gs_ep_ecp_101_en

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Exploration & Production

This document is the property of Total. It must not be stored, reproduced or dis closed to others without writ ten authorisation from the Company.

GS_EP_ECP_101_03_EN.doc

GENERAL SPECIFICATION

PROCESS

GS EP ECP 101

Glycol package unit

03 11/05 Updated to include EP in GS nomenclature

02 10/03 Update and change of Group name and logo

01 09/02 Replaces GS EXP 301

00 06/01 First issue

Rev. Date Notes

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General Specification Date: 11/05

GS EP ECP 101 Rev: 03


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Contents

1. Scope ....................................................................................................................... 42. Reference documents............................................................................................. 43. General..................................................................................................................... 53.1 Definition of terms.............................................................................................................. 53.2 Conflictive requirements .................................................................................................... 53.3 Referenced documents...................................................................................................... 53.4 Site environmental conditions............................................................................................ 53.5 Utilities............................................................................................................................... 63.6 Area classification.............................................................................................................. 64. Scope of supply ...................................................................................................... 64.1 Extent of supply ................................................................................................................. 64.2 Supply limits....................................................................................................................... 85. Process design minimum requirements ............................................................... 85.1 Main parameters................................................................................................................ 85.2 Glycol dehydration column .............................................................................................. 105.3 Glycol regeneration skid .................................................................................................. 136. Safety ..................................................................................................................... 256.1 Glycol skid ....................................................................................................................... 256.2 Gas and fire detection...................................................................................................... 256.3 Fire-fighting...................................................................................................................... 257. Layout and general requirements........................................................................ 268. Minimum information to be supplied by Vendor ................................................ 268.1 Tender documents........................................................................................................... 268.2 Documents for approval during detailed engineering ...................................................... 278.3 Final documentation ........................................................................................................ 289. Process guarantee ................................................................................................ 289.1 Water content .................................................................................................................. 289.2 Turn down ratio................................................................................................................ 289.3 Inlet gas filter separator ................................................................................................... 28

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9.4 Pressure drop/Temperature increase in the contactor .................................................... 289.5 Glycol losses.................................................................................................................... 289.6 Utilities consumption........................................................................................................ 289.7 Mechanical guarantee for internals.................................................................................. 28

APPENDIX

TECHNICAL EVALUATION

FIGURE 1 TYPICAL PROCESS FLOW DIAGRAM OF GLYCOL PACKAGE UNIT

FIGURE 2 TYPICAL PID OF DEHYDRATION COLUMN AND GLYCOL FINAL COOLER

FIGURE 3 TYPICAL PID OF GLYCOL REGENERATION SKID (LOW CAPACITY)

FIGURE 4 TYPICAL PID OF GLYCOL REGENERATION SKID (high capacity with fire tubeburner)

FIGURE 5 TYPICAL PID OF GLYCOL REGENERATION SKID (high capacity with externalreflux condenser)

FIGURE 6 CONTACTOR TOP RECOMMENDED ARRANGEMENT

FIGURE 7 LIQUID LEVELS IN DRUMS AND CONTACTOR

FIGURE 8 LIQUID LEVELS IN REBOILER

FIGURE 9 EQUILIBRIUM H2O DEWPOINT VERSUS TEMPERATURE AT VARIOUS TEGCONCENTRATIONS (metric and english units)

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1. Scope

This specification covers minimum requirements for the design, manufacture and guaranteedperformance of Tri Ethylene Glycol Package Unit.

This general specification does not remove the responsibility of the Vendor. In his proposal,Vendor will outline the clauses of this specification (if any) that are not in accordance with therequired performances to be guaranteed.

This specification is specific for Glycol Package Unit consisting of a glycol dehydration columnand a glycol regeneration skid. It should be adapted for other case (MEG - DEG injection).

Information contained in this specification is Proprietary and Confidential Informationand is

not be revealed to any outside of the necessary personnel within the bidder COMPANY.Deviations from this general specification and/orAPI 12 GDUlast edition shall be itemized withfull details of proposed alternatives under the heading "Exemptions to Specification" in theVendor's proposal. Otherwise, it shall be deemed that the equipment offered is in fullaccordance with the referred documents.

2. Reference documents

The reference documents listed below form an integral part of this General Specification. Unlessotherwise stipulated, the applicable version of these documents, including relevant appendicesand supplements, is the latest revision published at the EFFECTIVE DATE of the CONTRACT.

Standards

Reference Title

Not applicable

Professional Documents

Reference Title

API 12 GDU

API STD 674

Regulations

Reference Title

Not applicable

Codes

Reference Title

Not applicable

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Other documents

Reference TitleGPSA Engineering Data Book

Total General Specif ications

Reference Title

GS EP SAF 227 Safety rules for fired heaters

3. General3.1 Defin ition of terms

The following terms as defined below have been used through out this specification:

The COMPANY Total

Engineer As defined in the particular specification

Vendor MANUFACTURER or Vendor of material and/or equipment.

3.2 Conflictive requirements

In case of conflict between the inquiry and order, the information included in the order shallgovern.

In case of conflict between this specification, the documents listed in the requisition and datasheets, the following order of precedence shall govern:

Local regulations

Purchase requisition

This specification

API 12 GDUlast edition

Particular specifications and data sheets

Engineer's specifications

COMPANY's documents.

3.3 Referenced documents

The package equipment and all accessories shall be designed, fabricated and tested inaccordance with the specifications, codes, standards and regulations listed in the purchaserequisition (and specially GS EP SAF 227: Safety rules for fired heaters).

3.4 Site environmental conditions

The site environmental conditions are as stated in the particular specification.

The equipment shall be designed to operate satisfactorily over the entire temperature range andother adverse ambient conditions specified in the particular specification.
http://gs_ep_saf_227_en.pdf/http://gs_ep_saf_227_en.pdf/

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3.5 Utilities

All available utilities on the field are as stated in the particular specification.

Vendor to advise estimated utilities consumption with his proposal.

3.6 Area classi fication

The equipment shall be suitable for operation in hazardous area Zone 2, Group IIB, Class T3 asa minimum.

4. Scope of supply

4.1 Extent of supply

4.1.1 General

Engineering services for detailed engineering

Procurement activities, material and equipment supply

Fabrication and shop erection

Shop testing and services of personnel required during testing

Inspection, Quality Assurance/Quality Control

Spare parts for commissioning and start-up

Special tools for installation and maintenance if any

Packing and marking

All documents requested in the purchase requisition, including eventually additionaldocuments requested for certification by a third party

Pre-commissioning, commissioning and start-up procedures

Operating and maintenance manuals

Mechanical and performance guarantees.

4.1.2 Scrubbing system of the inlet gas

Scrubbing system is composed of a knock-outdrum plus an inlet gas filter separator installedupstream of the contactor and equipped with vane packs and cartridge filter for liquid/gasseparation.

4.1.3 Glycol dehydration column

The glycol dehydration column equipped with its internal (structured packing or trays and misteliminators).

4.1.4 Glycol regeneration skid

Equipment for the regeneration skid must include as a minimum:

One flash drum

Two cartridges filters (one stand-by)

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One activated carbon filter

One still column

One integrated reflux condenser or one external reflux condenser with receiver drum andreflux pumps

One reboiler, equipped either with fire tubes or electrical bundle or hot oil bundle

One stripping column if required

One or two rich/lean glycol heat exchanger(s)

One surge drum

Two or three injection pumps (one stand-by) driven by electrical motors, equipped withnecessary pulsation dampeners installed both on suction and discharge

One final lean glycol cooler

One glycol make-up facilities

One close drain storage with one recirculating pump if required

Two chemical injection skids (pH control, antifoam)

One CO2snuffing system.

Fabricated steel skid to mount above equipment, with all necessary access/maintenanceplatforms, stairways, handrails and walkways.

The total area of the skid is covered with a drip pan to collect all spilled and/or drained liquids.

Drip pan is constructed with a minimum slope of 10 mm per meter. The drip pan is provided witha specific valved drain piped (3" minimum) to the edge of the skid at the lowest point. The drainpipe is terminated with a flange.

All on-skid pipework, pipe supports and valves for process, utilities, drains, vents and reliefsystems.

All instruments, instrument supports, instrument cabling, instrument air headers, cable and/orpipe trays. Control panel will be either locally mounted or installed in control room as perparticular specification.

The unit shall be designed in order to avoid piping, valves, vessels, structural and instrumentvibration. Adequate supports and structure shall be designed in accordance with the vibrationstudy included in the scope of work.

Internal earthing loop, branch connection with 2 (two) earthing bosses located at opposite sidesfor external earth connections.

Lighting system if required in the particular specification.

Painting of complete package.

Heat insulation required for heat retention or personnel protection as necessary.

Check points for corrosion inspection should be accessible through the insulation.

Heat tracing when necessary.

Lifting equipment (spreader bar, shackles and slings) to lift the completely assembled unit.

Lifting devices for maintenance.

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Removable equipment supports as necessary for package transport to site.

Fire and gas detection system if required and as defined in the particular specification or in the

safety concept.

Deluge system if required in the particular specification or in the safety concept.

4.2 Supply limits

Vendor shall provide all materials and equipment described in this specification in the particularone and any other item which may be considered necessary for efficient and simple workingand maintenance, completely assembled and ready for hook-up to services connections.

The limits of scope of supply shall be as follows:

Piping: all on-skid process and utilities pipework to terminate by a flange at the skid edge

Electrical: power and control cables will be supplied and installed by COMPANY up to theA.C. junction box/terminal box complete with glands located on motors and/or electricalbundles. Cable routing, cable trays and supports shall be supplied by Vendor

Instrumentation and fire and gas detection: wired up to local control panel if installed onskid or to the junctions boxes.

5. Process design minimum requirements

5.1 Main parameters

1. Type of glycol to be used

Use of TEG is only considered in this specification.

2. Water content of Feed Gas

If water content of the wet gas is not given in the particular specification, adopt the highervalue of water content obtained with:

The more conservative correlation from Vendor know how (This one must be presented inthe proposal).

The charts given in the last edition of the GPSA Engineering Data Book with salinity andrelative density correction (This value must be multiplied by 1.1),

The charts given by Wichert in Oil and Gas Journal (March 29, 1993) with salinity andrelative density correction (This value must be multiplied by 1.1).

Note:

In all cases corrections for acid gas components have to be taken into account.

Water content shall be calculated for the most stringent operating conditions (minimumpressure, maximum temperature).

3. A margin of 5C on guaranteed dew point value is usually taken depending on contractualpenalties attached to this guaranteed value.

4. Glycol flow rate

A low ratio of lean TEG per kilogram of removed water is used when water content is high(low pressure and high temperature feed gas), and high ratio is used when water content is

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low (high pressure and low temperature or non water saturated gas) or when the capacity ofthe dehydration unit is very low.

Table hereafter gives the minimum lean TEG/removed water ratio versus the water contentof the wet gas to be used by Vendor.

Water content of wet gasLean TEG/Removed water

ratio

mg/Sm3kg/MMSCF(x 0.0283)

lb/MMSCF(x 0.0624)

kg/kgUSG/lb

(x 0.1089)

5000 141 312 15 1.6

3000 - 5000 85 - 141 187 - 312 18 2.0

2000 - 3000 57 - 85 125 - 187 20 2.2

1200 - 2000 34 - 57 75 - 125 22 2.4

800 - 1200 23 - 34 50 - 75 25 2.7

600 - 800 17 - 23 37.5 - 50 27.5 3.0

400 - 600 11 - 17 25 - 50 30 3.3

400 11 25 35 3.8

Furthermore, to insure a good wetting of the structured packing, a minimum glycol flow rateof one cubic meter per hour per square meter of dehydration column area section is

requested.

Increasing the glycol flow rate and purity may reduce the structured packing height, but thegain obtained by reduction on the glycol contactor height is counter balanced by the increaseof the regeneration unit size since more glycol have to be treated.

5. Purity of the lean glycol

Even if the purity of the lean glycol does not required it, the installation of a strippingcolumn must be considered.

At least, provis ion for direct st ripping gas in jection into the reboiler must be provided.(applicable at small uni ts on ly).

If the wet feed gas is not water saturated the lean glycol purity and the number of equilibriumstage in the contactor will be defined by assuming the feed gas is water saturated.

The lean glycol concentration shall be determined with a margin of 10C between therequired water dew point and the theoretical equilibrium dewpoint.

6. A detailed material balance including all components (H2O, TEG, high and heavyhydrocarbons, aromatics, H2S, CO2, etc.) must be submitted.

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Glycol losses shall be explicited: liquid carry over and vapor tension in dry gas, flash drum,still column overhead, pumps leakage, etc.

Detailed calculation according to GPSA Engineering Data Book for aromatics shall besubmitted to COMPANY.

7. If no aromatic content is specified in the feed gas composition, consider for the design thata minimum value of 10 mol % of the C6+are composed of aromatics.

Special care must be taken for the design of the stripping column, still column, overheadcondenser and charcoal filter to account for aromatics from gas dissolved in the glycol.

5.2 Glycol dehydration column

5.2.1 Scrubbing system of the inlet gas

5.2.1.1 Scrubbing system description

To prevent gas dehydration unit troubles it is essential and highly recommended to have acomplete scrubbing of the incoming wet gas always contaminated by solids and free liquids(hydrocarbons, water and specially brine, compressor oil, drilling mud, corrosion inhibitor, pipedirt, formation solids, etc. ).

Scrubbing system shall be located close to the absorber to prevent condensate forming in theinlet scrubber-absorber line due to pressure drop and ambient temperature effect (line shall beinsulated). Scrubbing system is composed of:

1. a knock-out drum, not part of the package unit, to separate the liquid slugs carried by thewet gas,

2. a filter/separator installed downstream the knock-out drum, to remove liquid droplets or dustparticles contained in the gas leaving the knock-out drum (carry over).

Filter/separator may be part or not of the glycol package unit. If the supplier of the glycolpackage unit must guarantee the efficiency of this unit it is a good practice to considerfilter/separator part of the package unit.

Note:

1. knock-out drum is a 3 phases separator.

2. It is not recommended to integrate an inlet separator at the bottom of the dehydrationcolumn (or contactor) instead of the scrubbing system.

5.2.1.2 Gas filter/separator description and performance

This filter (horizontal or vertical) will be a two stages filter (solids filtrations and coalescing of thesmall liquid droplets: cartridges - liquid removing: vane pack) and will achieve the followingfunctions:

Removing of the solid particules. This filter will be designed to remove 99.0 % of theparticules with a diameter greater than 1 micron.

Coalescing of the liquid fog contained in the gas and removing with high efficiency thecoalesced droplets. This filter will be designed to remove 99.0 % of the liquid droplets witha diameter greater than 0.3 microns. If not specified in the particular specification, this

filter will be also design for:

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Liquid content of the inlet gas: 1 m3/106 Nm3of gas or 1000 ppm wt

Liquid content of the outlet gas: 5 liter/106 Nm3of gas or 5 ppm wt.

Operating pressure of the first section is equal at the operating pressure of the second sectionplus the gas pressure drop through the cartridges. Since the operating pressures in thetwo sections can be different by 0.5 bar (with fouled cartridges), each section shall be equippedwith its own liquid outlet and its instrumentation.

No spare is required for this service, but a by-pass of the filter with isolating valves will beinstalled.

This filter will be equipped with a quick opening closure. It will be also equipped withdepressurization and nitrogen inerting facilities. Provision for future methanol injection will beprovided in the two liquid outlets.

Ladders and/or platform brackets are provided.Heat tracing of level instruments has to be carefully studied to avoid hydrates formation in deadends during cold season under wind effects.

Minimum instrumentation:

Level controller with automatic level control valve on the two liquid outlets

Level glasses

Low low level switch with emergency shutdown valve on the two liquid outlets

High high level switch with alarm on the second stage

High differential pressure gauge/alarm

Pressure safety valve

One BDV (if required).

5.2.2 Dehydration column

The glycol contactor is normally fitted with structured packing. Nevertheless bubble cap trayscontactor can be considered for special cases (onshore project with low gas pressure).

An overdesign of 10 % on the maximum operating gas flow is to be considered for the design ofthe dehydration column, to take into account gas flow fluctuations.

Gas distribution system at the bottom of the contactor and top glycol distributor tray shall be

guaranteed by the structured packing Vendor. An inlet divertor and a tray must be fitted at thegas inlet section. Their design has to insure a good gas distribution through the structuralpacking by avoiding channelling.

The minimum glycol surge (NLL-LAL) time in the dehydration column is 10 minutes (seefigure 7 Liquid levels in drums and contactor).

For contactor levels could be installed in the hemispherical head with a minimum distance of300 mm for the LALL/bottom distance.

The diameter of the column and the height of structured packing are calculated and guaranteedby the SUPPLIER/MANUFACTURER of structured packing.

The minimum height of structured packing is 3 meters.

The minimum number of trays is 6.

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At the top of the dehydration column, a mist eliminator to eliminate 99.0 % of droplets largerthan three microns plus a vane pack are installed to minimize glycol looses which are

guaranteed for less than 10 l/106

Nm3

(0.07 USG/MMSCF).The distance between the top of the structured packing and the mist eliminator must be at least1200 mm. The distance between the mist eliminator and the vane pack must be at least400 mm.

Any liquid collected from the vane pack shall be drain to avoid reentrainement and foaming.

The distance between vane pack and top must be at least as shown on figure 6.

Installation of an external filter downstream of the contactor to minimize TEG looses could beconsidered for particular projects (Supply of glycol is difficult. Liquid glycol is not acceptable inthe treated gas).

Insulation of the dehydration section has to be provided to avoid hydrocarbon condensationduring cold season, specially in hot countries, or in country with heavy rains.

Instead of insulation, protection against heavy rain could be acceptable for tropical countries.

In any case, insulation supports are provided.

Ladders and/or platforms brackets are provided.

Heat tracing of level instruments has to be carefully studied in dead ends during cold seasonand/or under wind effects.

316L stainless steel lining up to one meter in the structured packing bed shall be provided. Incase of presence of H2S, the whole column should be preferably 316L SS cladded (advise fromTDO/TEC corrosion specialist is required, depending on the H2S content).

Skimming device must be installed inside the glycol column to remove possible hydrocarboncarried over from the upstream equipment (bypass of the inlet gas filter) or condensed in theglycol contactor (retrograde condensation) (see figure 2 Typical PID of dehydration columnand glycol final cooler).

Interface level glass shall be installed to allow hydrocarbon skimming.


Level controller with automatic level control valve (See note)

Level glass

Low low level switch with emergency shutdown valve on the glycol outlet

High high level switch

Differential pressure gauge with alarm high across the structured packing


BDV (if required): two BDV's upstream and downstream of the packing shall be preferablyinstalled to avoid high flow rate through the packing (refer to PID figure 2).

Note: Level control valve for glycol outlet should be preferably located on the regeneration skidto avoid vibration due to long two phases flowline.

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5.3 Glycol regeneration skid

5.3.1 Flash drumThis drum is an horizontal three phases separator.

Operating temperature of the flash drum must be included in the range 70 to 100C. Ifnecessary, one rich/lean glycol heat exchanger must be installed upstream the flash drum.

Normal operating pressure of the flash drum is 2 to 5 bar g.

An impactor is located on the glycol inlet, vortex breaker is located on glycol outlet.

The design of this flash drum can be based on:

Either a vertical weir to separate TEG from liquid hydrocarbons, in this case a vortexbreaker is located on liquid hydrocarbons outlet

Or a liquid hydrocarbon outlet formed by a vertical pipe connected to an horizontal pipe,located inside the flash drum at a level higher than the TEG high high level switch. Thetwo ends of the horizontal pipe are closed and several ports are located on the lower partof the pipe. Total area of the ports is twice the area of the nozzle.

Retention time of glycol in the flash drum is at least 30 minutes (see figure 7 Liquid levels indrums and contactor).

Minimum requirement for liquid levels are two minutes of glycol flow rate or 100 mm between:

Normal Liquid Level (NLL) and alarm levels

Alarm levels and shutdown levels.

Sizing of the glycol level control valve must take into account solubility of natural gas in glycol.Calculation of vaporization of all components of gas, including H2S, CO2, heavy hydrocarbons,aromatics, etc., has to be done prior to valve sizing.

Pressure Safety Valve is sized for the two following cases:

Case one: external fire

Case two: gas coming from the glycol dehydration column considering that glycol level islost in the glycol dehydration column and glycol level control valve of the glycoldehydration column and by-pass valve are full simultaneously open.

In case of glycol contactor operated at high pressure, two LCV (one in operation, one in

stand-by) with one manual interlock of the upstream block valves can be installed in order toreduce gas blow-by flowrate and therefore the size of this PSV.

Insulation for heat conservation or insulation for personnel protection can be necessary.

Mechanical design pressure of flash drum to be at least 10 bar g.

Minimum equipment, instrumentation:

Glycol and hydrocarbons level controllers with automatic control valves (See note)

Level glasses for glycol/hydrocarbons and hydrocarbons/gas interfaces (See note)

Glycol high high level switch with emergency shutdown valve on the glycol inlet to avoidglycol losses

Two pressure control valves one to release pressure to the flare, the other to maintain ablanketting fuel gas pressure in the vessel

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Pressure gauge

Temperature gauge

Flow indicator with isolating and by-pass valves located on the glycol outlet piping

Three liquid sample connections located at the glycol/liquid hydrocarbon interface level, atplus 150 mm and at minus 150 mm.

Note:The position of the nozzles of the level instrument should be:

TEG/HC liquid phases interface: One nozzle in TEG and one nozzle in HC liquid phase

HC liquid/gas interface: One nozzle in HC liquid phase and one nozzle in gas phase.

5.3.2 Cartr idge fi ltersTwo identical cartridge filters are installed on the rich glycol line leaving the flash drum: one inoperation, one in stand-by.

Each filter is designed to handle 125 % (one hundred and twenty five) of the total flow of richglycol.

Pressure drop through the cartridge filter will not exceed:

Clean condition: 0.1 bar

Fouled conditions: 0.7 bar.

Filtration efficiency of cartridge filters is an absolute efficiency of 99 % for any particles with

diameter greater than 10 microns under normal conditions.

Minimum filtration area is 0.2 m2per m3of TEG.

During initial start-up one set of cartridges per filter shall be provided to remove 99 % of all solidparticles 25 microns and over. They will be supplied as commissioning spare parts.

Each filter shall be equipped with a connected vent line with a sight flow indicator (to check ifgas is trapped at the top of the filter).

Design of filters (bolted cover for high pressure and quick release cover for low pressurecomplete with safety interlocks to prevent accidental opening under pressure) and adequateaccess allow a quick change of cartridges.

Insulation for heat conservation or insulation for personnel protection can be necessary.Mechanical design pressure of cartridge filter to be at least 10 bar g.


Isolating, vent and drain valves

By-pass valve

One pressure safety valve

One differential pressure gauge.

5.3.3 Activated carbon filter

One activated carbon filter is installed downstream the two cartridges filters.

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This filter is designed to handle a minimum of 15 % of the rich glycol flow rate, flow balance isflowing through the bypass.

Pressure drop through the activated carbon filter will not exceed:

Clean condition: 0.1 bar

Fouled conditions: 0.7 bar

Activated carbon is contained in cartridges in order to facilitate maintenance and to avoidactivated carbon particles carry over.

Design of filter (quick release cover complete with safety interlocks to prevent accidentalopening under pressure) and adequate access allow a quick change of cartridges.

Insulation for heat conservation or insulation for personnel protection can be necessary.

Mechanical design pressure of activated carbon filter to be at least 10 bar g.

In case of presence of aromatics in high concentration, installation of activated carbon filter onthe lean glycol has to be carefully studied (downstream injection pumps or partial pump aroundon the surge drum).


Isolating, vent and drain valves

Bypass valve

One pressure safety valve

One differential pressure gauge.

5.3.4 Still column

The still column is fitted with two beds of one meter high minimum of 316 stainless steel randompacking (PALL rings or equivalent) per bed.

Ceramic saddles are prohibited.

Each bed of packing is limited by a supporting grid and a liquid distributor tray.

Design of internals allows an horizontal transportation of the column.

Design of the column allows packing installation with minimum operation and maintenancepersonnel.

Insulation for heat conservation is required.

Still column to be in corrosive resistant material (SS 316L or equivalent).

Design pressure of still column to be in accordance with maximum operating pressure of theflare and to be at least 2 bar g.


Temperature gauge on the vapor outlet.

5.3.5 Still column condenser

The reflux condenser shall be sized for a minimum reflux ratio of 30 % based on the total

quantity of water to be removed.Reflux condenser systems to be in corrosive resistant material (SS 316L or equivalent).

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Design pressure of still column to be in accordance with maximum operating pressure of theflare and to be at least 2 bar g.

5.3.5.1 Solution with integrated condenser

This solution is applicable for units with low capacity.

This reflux condenser located at the top of the still column is a shell and tubes heat exchanger(coil must be avoided).

Insulation for heat conservation is necessary (heavy rain).


Upstream isolating and manual control bypass valves

Temperature gauges located upstream the condenser and downstream the bypass.

5.3.5.2 Solution with external condenser

This condenser allows to condensate the maximum of water and heavy hydrocarbons.

Heat exchanger type: air cooler or cooling water. Refer also 5.3.11.2and 5.3.11.3.

Receiver drum:

Type: horizontal 3-phase separator (vertical drum could be acceptable depending ondisposal of condensed water)

Gas to be sent to the LP flare

Recovered liquid hydrocarbon should be sent by gravity to the oily closed drain system

through a siphon (safety precaution must be considered to avoid back pressure from otherclose drains). If pressure allows a control valve should be installed (refer to PID inappendix)

Condensed oily water: to be pumped, partially to the still column to assure the refluxthrough a flow control valve, balance to the oily water treatment through a level controlvalve


Level glass on the water side

Low low level switch on the water side to shut-off the recirculating pump

Temperature gauge

Instrumentation requested following the chosen solution.

Condensed reflux pumps

Two pumps are installed: one on duty, one stand-by

These pumps are electric motor driven centrifugal pump and are installed complete withisolating valves, non-return discharge valve, inlet "Y" strainer, discharge pressure gaugeand recirculating pressure safety valve.

Piping

Special care should be taken when selecting material as condensed water could becorrosive.

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5.3.6 Reboiler

Design of the glycol regeneration unit should be based on a temperature at the reboiler not

exceeding 204C. If possible a lower temperature should be selected.

A detailed calculation note of the reboiler duty must be submitted to COMPANY forapproval.

The reboiler duty is calculated taking into account the following assumptions:

Inlet temperature of rich glycol not higher than 150C

Reflux in still column considered as 30 % of water flow to be removed as a minimum

Desorption of aromatics if any

Thermal losses to be calculated.

Duty of reboiler has to be oversized, to take into account start-up periods, as follows:

20 % for electrical heaters

10 % for hot oil or fire tube reboilers.

Duty of the reboiler expressed in kcal per kg of water removed must not be lower than:

Lean TEG/Water ratio, kg/kg 15 25 35

Calculated 1,380 1,720 2,070

Installed(oversizing included)

Hot oil or fire tube (Note 1) 1,520 1,890 2,270

Electrical 1,660 2,060 2,480

Above data are based on:

Temperature of rich glycol of 150C at still column inlet

Reflux of 30 %

10 % of thermal losses

No aromatics, in the rich glycol.

Note 1:Formula for interpolation: Q = kg/kg x 37.5 + 957

Average heat flux across fire tube or electrical bundle wall cannot exceed20,000 kcal/h m2 (2.3 W/cm2) at design duty. Calculation shall be provided to COMPANY.

In any case, the skin temperature of the heating element will not exceed the degradation limitof glycol, i.e. 230C.

Detailed calculation must be provided.

Two coils to heat fuel gas are installed in the bottom of the reboiler:

The first one to heat the stripping gas up to 120/150C

The second one to heat the burner fuel gas up to 60/80C.

A drain pot, with a manual drain, is installed upstream the preheating coils.


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Design pressure of the reboiler to be in accordance with maximum operating pressure ofthe flare and to be at least 2 bar g.


Pressure gauge

Pressure Safety Valve (PSV) calculated for reboiler blocked outlet and fire case

Temperature controller

Temperature gauge

High temperature alarm

High high temperature switch

Low temperature alarm

Low low temperature switch if requested by the gas processing

Level glass

Low low level switch located at the top of the fire tube or electrical bundle.

Minimum instrumentation on the stripping gas line:

One automatic pressure control valve

One pressure gauge

One flow indicator with manual adjustable, isolating and bypass valves

One temperature indicator.

5.3.6.1 Hot oil reboiler

If hot oil (minimum temperature 250C) is available on site, this technology is the preferred one.

Hot oil bundle is made from "U" tubes, 1" diameter.

Bundle is removable.

5.3.6.2 Fire tube reboi ler

This technology is used for heavy duty reboilers.

Section of fire tube has to be calculated with a heat flux not exceeding 20 000 kcal/(h.m2) basedon design duty of the burner.

Multi return tubes directly welded on the main tube require COMPAGNY approval. Direct firedU tube type is preferred. Mitre bend both sides welded (internal, external) is acceptable.

Fire tube must be seamless type.

When length of fire tube is longer than 10 meters or diameter > 24", or when duty to betransferred to TEG is higher than 750,000 kcal/h, two fire tubes must be preferably installed.

In case of duty to be transferred higher than 1,500,000 kcal/h i.e. quantity of water to beremoved higher than about 800 kg/h, two reboilers should be preferably installed.

Fire tube is properly supported and the supports are designed taking into account the

differential expansion between the shell and the fire tube. Fire tube shall be field removable forinspection. Minimum wall thickness of the fire tube must be 10 mm.

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To ensure that fire tube is always immersed in glycol, normal liquid level must be 150 mm abovethe fire tube (see figure 8 Liquid levels in reboiler).

Thermal duty of the burner must be at least 1.7 time the heat to be transferred to the TEG.

A heat resistant firing cylinder where the flame burns is located in the fire tube. Tertiary air withmanual tertiary air register control is flowing between the cylinder and the fire tube.

A peep hole allows to inspect the flame pattern (main flame and pilot) within the burner and firetube.

The vent stack shall be externally supported on an appropriate structure and fitted with a sparkarrestor.

Air Flow and fuel/air radio control: Forced draught is the preferred solution. For details refer toTotal General Specification GS EP SAF 227Safety rules for fired heaters.

Dampers and flame arrestors: gas tight dampers shall be installed on the air inlet of the forceddraught fired heaters. Refer to GS EP SAF 227.

Igniters: Each burner shall be provided with its own igniter. "Pilots" shall be avoided. Refer toGS EP SAF 227.

The flame detection system is either an Ultra Violet self-checking detector or an ionization rod.

Flame detectors based on temperature effects are not accepted.

The safety shutdown system is closing fuel gas to the main burner (and to the pilot, if pilot isdesigned for a continuous operation) under the following abnormal conditions:

Too high fuel gas pressure

No flame

Too high reboiler temperature

External ESD

High temperature (TSHH) in the stack.

Two automatic SDV valves and one automatic purge valve are installed on the main burner lineand on the pilot line.

For small duty natural draft burner could be acceptable subject to a derogation from COMPANY.

In this case:

Primary and secondary manual air registers are provided.

Air intake(s) to burner prevents wind blow dust to enter the burner and is fitted with aflame arrestor(s).

The ignition system includes a forced purge cycle to prevent the introduction of fuel gasinto the fire tube before the pre-set purge cycle is satisfactorily completed.

The system includes a flame detection device on the pilot burner which prevents theopening of the main burner control valve until the pilot flame is established and detected.

Following calculations have to be submitted:

Chimney draft

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Pressure drop across the air inlet, including flame arrestor, fire tube and stack. To beacceptable, the chimney draft has be to higher than the pressure drop by a minimum of

30 %.

5.3.6.3 Electrical bundle

This technology which is reliable and easy to operate must be considered especially for lowduty reboilers.

An extra 10 % electrical resistances is installed but not connected, to allow good operationof the plant in case of failure of some resistances without heavy maintenance works.

Temperature control:

If not mentioned in particular specification or data sheet, regulation may be 100 % viathyristor power (For electrical power less than 100 kW).

For higher duty, the control system should be based on a mixed system in order to avoiddisturbances due to harmonics. This system includes:

n sets of resistances fed in mode ON/OFF by means of electromagnetic contactors.These sets of resistances ensure the bulk regulation of the temperature

One set of resistances fed via a power thyristor. This set of resistances insures the trimregulation. Thyristor technology will be of batched full series waves type.

Shutdown system: the protection of the electrical heater is performed through:

One high high temperature switch on the TEG liquid to shut-off the electrical power

Four high temperature switches on skin temperature of resistances: two installed onON/OFF fed resistances of different types (RTD and thermocouple), and two installed onthyristor fed resistance. In case of one high temperature detected by one detector, theelectrical heater is automatically shut off

Low Liquid Level (LSLL) External ESD.

5.3.7 Stripping column

The stripping column is fitted with one bed of 1.2 meter high minimum of 316 stainless steelrandom packing (PALL rings or equivalent).

Ceramic saddles are prohibited.The packing is limited by a supporting grid and a liquid distributor tray.

Design of internals allows an horizontal transportation of the column.

Design of the column allows packing installation with minimum operation and maintenancepersonnel.

A balance line allows the stripping gas to flow to the reboiler in a different pipe than the glycol toavoid any disturbance to the glycol.


No instrumentation is required.

Material to be carbon steel with 5 mm corrosion allowance or Stainless Steel.

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5.3.8 Rich/lean glycol heat exchanger(s)

For the case with external reflux condenser, a rich/lean heat exchanger must be installed

upstream the flash drum in order to operate the flash drum at a temperature of 70C minimum.

For the case with integrated reflux condenser the glycol entering the flash drum is heated in theexchanger installed on top of the still column.

On lean glycol stream heat exchangers may be located between the stripping column and thesurge drum, or between the surge drum and the injection pumps.

Rich/lean glycol heat exchangers are welded stainless steel plate heat exchangers (compablocfrom VICARB or equivalent).

Plate and gasket heat exchangers are prohibited due to leaks during transitory periods.

An over design of 25 % extra heat transfer area is taken for fouling.



Four temperature gauges located on the inlets and outlets of the heat exchanger.

5.3.9 Surge drum

The surge drum (see figure 7 Liquid levels in drums and contactor) is sized as follow:

Low low level shutdown is not lower than 200 mm above the lowest point of the shell or30 seconds on glycol flow rate, whichever is the highest.

The glycol volume between the Low Level Alarm and the Low Low Level shutdown (LAL-

LALL) is at least 3 (three) days of estimated consumption of the whole glycol packageunit (1) or 100 mm.

The glycol volume between the low level and high level alarms (LAL-LAH) is at least15 (fifteen) days of estimated consumption of the whole glycol package unit (1)

If not specified in the particular specification, the capacity of the reboiler plus the glycoldehydration column, considered at the working temperature, must be stored above thehigh level pre-alarm.

Note 1:Estimated consumption based on 1 l/MMSCF (35.4 l/106Sm3) or guaranteed valuewhichever is the highest.

Insulation for heat conservation is not required, insulation for personnel protection may benecessary.


Level glass

Low level alarm

Low low level switch

High level alarm.

A balance line between the stripping column and the reboiler shall be provided.

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5.3.10 Glycol circu lation pumps

The pumps (one or more on duty, one stand-by) are positive displacement type designed to

API STD 674. Nevertheless, speed values indicated in Table 1 ofAPI 674: maximum allowablespeed ratings for power pumps in continuous service must be decreased by 20 %.

Pumps are heavy duty pump types.

Crankshaft is made of forged steel. Pumps valves and seat shall be hardened 410 SS. Plungershall be colmonoy overlay and pump packing shall be braided PTFE.

The pumps are mounted on a fabricated baseplate complete with electrical motor and drivemechanism entirely protected. Pump shall be driven by constant speed electrical motors. Motorhorsepower shall be adequate for 110 % of the maximum flow rate and maximum pressuredrop.

During normal operation, suction temperature shall not exceed 90C.

Suction pressure has to be higher than atmospheric pressure.

Suction and discharge piping must be equipped with static pulsation dampeners.

Pulsation dampener calculations taking into account the pump, the suction and discharge linecharacteristics must be submitted to COMPANY.

Pneumatic pulsation dampeners are prohibited to avoid any malfunction due to bad pressuresetting.

NPSH calculations shall be provided.

A minimum margin of 1.5 meters is to be planed between the required and the available NPSH.

Liquid velocity expressed in m/s on suction and discharge lines of the injection pumps shall notexceed.

RPM of pump Suction Discharge

250 max. 0.6 1.8

330 max. 0.45 1.35

Over 330 0.3 0.9

The suction piping shall be one or two time larger than the suction connection of the pump(API 12 GDU- D10). It should be short with a minimum of elbows and fittings.


Suction "Y" strainer with baskets, which can be removed without dismantling pipework,and isolating valve. The filtration area of the baskets is sufficient to assure one monthfiltration without any cleaning

Suction pressure gauge

Discharge pressure safety valve

Discharge pressure gauge

Discharge check valve with isolating valve

Liquid flow rate at the inlet of the glycol contactor.

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Note:All equipment installed from suction isolating valve (included) must be designed for thesame rating than the discharge line if automatic change from one pump to the other is

requested in the particular specification.

5.3.11 Final lean glycol cooler

This final lean glycol cooler, installed upstream the absorber, must be designed with an outlettemperature of lean glycol 5 to 10C higher than the dry gas temperature.

Temperature of lean glycol must be higher than temperature of dry gas to avoid hydrocarboncondensation at the top of the adsorber that can create foaming problem.

Temperature of lean glycol must be as low as possible to enhance water absorption and toreduce glycol losses.

10 % of extra surface must be provided as margin for fouling.

Insulation for heat conservation is not required, insulation for personnel protection may benecessary.


One temperature gauge on the TEG outlet.

5.3.11.1 Dry gas/Lean glyco l heat exchanger

This heat exchanger is of shell and tube type installed vertically on the dehydration column.

This solution is technically acceptable if there are not limitations on the gas pressure and thegas temperature (Through this heat exchanger dry gas temperature rises and dry gas pressure

drops).Drawback: temperature of lean glycol leaving this heat exchanger is gas flow rate dependent.This solution does not allow an accurate control of this temperature.

5.3.11.2 Cooling water/Lean glycol heat exchanger

If soft cooling water is available on site, this solution is technically acceptable.

If cooling water available on site is seawater, this solution should be avoided taking into accountthe fouling and corrosion problems.

Additional minimum instrumentation: One differential temperature controller (between dry gasand lean glycol temperatures) with temperature control valve located on the water network.

5.3.11.3 Air cooler

This solution is technically acceptable and should be used if dry gas or soft cooling watercannot be used.

The thermal rating shall be determined by the Vendor who shall demonstrate that hot airrecirculation has been taken into account, either by means of preventing hot air recirculating,when the overall layout has to be considered, or by raising the design air inlet temperature.

Air temperature indicated in basis of design corresponds to still air in open space. Considerationshall be given to proximity of reboiler, chimney hot equipment, possible recirculation of hot air,additional radiations from surrounding reflecting surface.

Fin on carbon steel tube shall be double "L" footed or extructed.

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Exchangers shall be designed for 110 % of the maximum specified process flow conditions. TheVendor shall ensure that the specified heat duty includes this extra 10 % and shall state this

clearly on the data sheet.In anticipation of fouling and possible damage to fins, the rating of the motor and thecorresponding point on the fan characteristic performance curve shall each be advanced by afactor of 1.2 times the air side pressure drop over the bundle. The motor rating thus calculatedshall be checked for the condition at specified minimum air temperature.

Turbulators in lean glycol air cooler are acceptable.

Additional minimum instrumentation: One differential temperature controller (between dry gasand lean glycol temperatures) with temperature control actuating the louvers of the air cooler ora control by-pass valve.

5.3.12 Fresh glycol make-up facil iti es

Fresh glycol make-up facilities consist of:

One glycol storage tank

One glycol make-up pump to fill the surge tank.

Fresh glycol storage tank (preferably installed, refer to data sheets):

Size: two weeks of estimated TEG consumption of the whole glycol package (refer tonote 1 5.3.9)


Level gauge

Blanketing with fuel gas: one PCV to pressurize the tank, one PCV to release thepressure to the flare

One pressure relief valve.

Fresh glycol make-up pump:

Electric motor driven centrifugal pump with local ON/OFF pushbutton, or pneumatic pumpmanually operated

Complete with isolating valves, discharge non-return valve, upstream pressure relief valve

To avoid too large flow of cold glycol to the hot surge drum, a manual flow control valve is

provided with a pump mini flow One solid particule filter to be installed at the pump discharge.

Glycol filtration: For gas with a high aromatic content it is recommended to install the possibilityto send a part of the regenerated glycol (without aromatics) into the charcoal filter by using themake up pump, refer to PID 0004 (Figure 5 Typical PID of glycol regeneration skid highcapacity with external reflux condenser) for optional possibility.

5.3.13 Closed drain facil ities

These facilities should be preferably installed to avoid pollution of the oily water treatment by theglycol.

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Close drain facilities consist of:

One close drain storage tank to recover close drain from the pumps, the filters and thelevel instruments if required

One recirculating pump to empty the drain storage tank into the surge drum.

Close drain storage tank

Size: 1 cubic meter


Level gauge

One pressure relief valve

One vacuum relief valve.

Recirculating pump:

Electric motor driven centrifugal pump

Complete with isolating valves, discharge non-return valve, upstsream filter andrecirculating pressure relief valve.

5.3.14 Chemical injection facilities

Chemical injection facilities may consist of:

One atmospheric tank with one dosing pump for the injection of the PH control/corrosioninhibitor chemical (same chemical for the two functions).

One atmospheric tank with one dosing pump for the injection of anti foam chemical.

Typical quantity to be injected in glycol is 0.1 to 1 liter per cubic meter of glycol.

Common products used for pH control and corrosion inhibitor are NACAP, NORUST, etc.

6. Safety

6.1 Glycol skid

Number of flanges on fuel gas and glycol piping shall be reduced to a strict minimum.Instruments on reboiler and glycol flash drum, drain points (process and instruments) and

flanges shall be located as far as practicable from the combustion air inlet.

6.2 Gas and fire detection

The gas dehydratation package shall have fire detectors designed and installed integrated intopackage. The detection signals are transmitted to F&G systems in the control room.

In the vicinity of each glycol reboiler air inlet gas detection shall be provided connected to theF&G system.

6.3 Fire-fighting

The CO2fire-fighting fixed equipment is included into gas dehydratation units.

If continuously available CO2 could be replaced by inert gas.

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Note:Requirement for F&G detection and CO2fire-fighting system are defined in the particularspecifications or in the safety concept.

7. Layout and general requirements

The design and layout of the package must take into account the need for regular maintenance.Equipment and piping arrangement shall afford adequate safe access for operation,maintenance and component removal for equipment, tube bundles, valves and controls.

For this purpose safe access ladders, platforms and railings shall be provided according to theproject standard.

For protection of personnel (for operating temperature above 70 C) the contact preventingprotection or the insulation shall be provided by Vendor.

The maximum temperature of any non electrical equipment under normal operating andabnormal conditions, shall not exceed 250C. This requirement can be fulfilled either by thermalinsulation or by construction glycol reboiler external hot parts (T > 250C) shall be heatinsulated (as gas tight as practicable) even if not located in a hazardous area as they are in arestricted area.

Check points should be accessible for corrosion inspection through the heat insulation.

Platform, ladders, railing, piping, etc., shall be removable where required for shipping,installation, and major maintenance.

Drip pans and trays shall be integral with the skid such that under no circumstance canglycol/hydrocarbon liquids be spilled into the surrounding areas.

The skid shall be provided with integrated drip pans and they shall have sloped bottoms andflanged drain nozzles(s) at the edge of the base frame.

The Vendor shall avoid protrusion of piping, structural, electrical and instrument installationoutside the boundary limits of the package. Where design or drawings incorporate suchprotrusions, the Vendor shall provide adequate temporary supports and/or protection devices asnecessary to prevent any damage of such items during transportation, lifting or installation.Where specified on the drawings, protrusions such as platforms and stairways are to beremovable and installed separately.

Grating shall be provided where personnel access is required for operation and regularmaintenance.

Lifting pads shall be installed for skid handling.

8. Minimum information to be supplied by Vendor

8.1 Tender documents

Data for bid tabulation refer to appendix for example

Process flow diagram

P&ID (the typical PID's included in the call for Tender must be followed as close aspossible by the Vendor)

Layout with main dimensions Detailed material balance including aromatics

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Equipment data sheet with details of internal specially for glycol contactor inlet gas filter,flash drum, surge drum and reboiler, fouling factor for exchangers, etc.

Glycol purity/flow rate

Process calculation notes (water content, glycol purity and flow rate, gas velocity incontactor, etc.)

Maximum guaranteed glycol losses in the contactor and in the regeneration package

Number of theoretical trays or height of packing in the glycol contactor and still column

Reboiler duty, heater surface temperature, heat flux and any allowance made for foulingof heaters

Vendor calculation/data sheets for exchanger, air cooler and pumps (if available)

Wheter derating factors (if any) have been applied to column loading to account forfoaming

Detailed weight breakdown (dry, operating, test, lift)

Utility consumption (normal and peak rates) including electrical power, fuel gas, coolingwater, instrument air, chemical product, etc. Individual motor horsepower ratings shall befurnished

Recommended spare parts for two years operations

Recommended spare parts for commissioning and start-up

Fabrication, inspection and testing capabilities of Vendor and any Vendors proposed

Place of fabrication and final assembly including methods of transportation and shipmentto site

References list.

8.2 Documents for approval during detailed engineering

All tender documents reissued for approval

Logic diagrams

Estimated glycol inventory of the system

Calculated and required NPSH for the glycol pumps

Vibration study

Calculation for reboiler burner

Dimensioned outline drawings showing plans and elevations of all equipment andcomponents on the glycol contactor and regeneration package and location ofpiping/electrical/instrumentation terminations on the contactor and the package

COMPANY connection requirements of all interface connections for piping, electrical andinstrumentation, details of method to support reboiler package on deck (bolts, welding,etc.)

CO2fire-fighting system specification

Interface documentation including:

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Skids dimensions, weights, centrum of gravity indication, lifting lugs/trunnions position

Lifting procedure

Interconnecting data for piping, electrical, instrumentations.

8.3 Final documentation

All documents here above

VENDOR catalogue data of major equipment including pumps, exchangers, filters, etc.

Operating manual

Maintenance manual.

9. Process guarantee

9.1 Water content

The water content of the dry gas shall be guaranteed for the design conditions.

9.2 Turn down ratio

Gas phase: 30 to 110 % of the design flow rate or as specified in the data sheet if morestringent turndown ratio is required.

9.3 Inlet gas fil ter separator

Maximum pressure drop across the filter: 0.1 bar (clean)

Liquid content of the outlet gas: 5 liters per 106m3 of gas or 5 ppm wt

Filtration efficiency: 99 % on liquid droplets with diameter greater than 0.3 microns

9.4 Pressure drop/Temperature increase in the contactor

Pressure drop through glycol contactor shall not exceed 0.5 bar.

Gas temperature shall not increase by more than 3C, providing glycol inlet temperature doesnot exceed specified operating value.

9.5 Glycol losses

Process glycol losses shall not exceed 10 liters/106Nm3(0.07 USG/MMSCF) for the contactor,and 4.3 liters/106Nm3 (0.03 USG/MMSCF) for the skid.

This excludes leakage at valve and pump packing and spillage to drain system.

9.6 Utilities consumpt ion

Utilities consumption (electricity, fuel gas, instrument air, etc.) and stripping gas flow rate shallbe guaranteed.

9.7 Mechanical guarantee for internals

Turn up ratio: 110 % of design flow rate.

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Technical evaluation

Process evaluation Unit Recom'dedvalue Vendor data Comment

General data

Gas Flow rate

Normal MMSCFD

Design MMSCFD

Nm3/h

kg/h

Gas temperature (maxi) C

Gas pressure (mini) barg

Gas density kg/m2

Water content

Feed kg/MMm3

Export kg/MMm3

Water to be removed

Normal kg/h

Design kg/h

Glycol

Mini. Flow rate kg/kg water

Lean glycol flow rate kg/h

Process data

Glycol circulation rate m3/h

Purity of lean glycol prior to stripping %

Purity of lean glycol after stripping %Purity of rich glycol %

Stripping gas rate scf/gal lean TEG

Aromatic flow rate (outlet reflex drum) kg/h

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Process evaluation UnitRecom'ded

valueVendor data Comment

Guaranteed values

Total glycol losses l/MMSCF 0.4

Inlet gas filter:

Filtration efficiency 99 % - micron 1

Liquid content in outlet gas ppm 5

Pressure drop in contactor bar < 0.1

Fuel gas consumption MMSCFD

Utility consumptionFuel gas:

Stripping MMSCFD

Burner MMSCFD

Max garanteedvalue

Electricity kW

Instrument air Nm3/h

Equipmentdata

Gas filter separator

Guaranteed performance (liq.) ppm wt 5

Diameter x Length m x m -

Pressure drop (clean) bar 0.3

Glycol contactor

Gas velocity m/s

Diameter m

Length/height m -

Packing height/nb of tray m

Packing type/tray type Melapach 250Y

Packing/manufacturer/tray Sulzer

Top vane pack area m2

Top mesh pad area m2

Distance packing/vane pack m

Distance vane pack/mesh m

Top mist eliminator efficiency

316L cladding height m

Skimming device - Yes

Max. glycol carry over in contactor USG/ MMSCF 0.07

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Gas inlet/outlet connections

Regeneration skid

Flash drum

H or V H

Diameter x length m x m -

Pressure (operating) barg 3 - 5

Pressure (design) barg 10

Temperature op/design C 90/105

Baffle or inside skimming device B

Volume m3

Corrosion Allowance (CA) mm

Cartridge Filters

Design flow rate % 125 % glycol

Delta P clean/dirty bar 0.1

Filtration area m2/m

3glycol 0.2

Set of cartridge for start up Yes

Particle to be removed micron 99 % >10 m

Diameter x length m x m

Cartridge size/number

Design pressure barg

InsulationAct ivated carbon f il ters

Design flow rate % 15 % glycol flow

Pressure drop clean/dirty bar 0.1/-

Design pressure barg 10

Insulation Yes


Volume m3

Still column

Diameter x height m x m -

Bed 1 height/bed 2 height m/m 1/1

Packing type PALL rings

Material SS

Design pressure barg > 2

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Insulation Yes

Still Column Condenser

Reflux ratio % prod. water 30 %

Material SS


Duty MMkcal/h

Temperature in/out C

Integrated or external ext.

Area m2

Length x width m x m

Motor kW

Receiver Drum

H or V H

Baffle Baffle

Design pressure (barg) 2

Material SS

Diameter (OD) x Length (TT) m x mVolume m

3

CA mm

Reflux pumps

Nb. 2

Flow rate m3/h

Pressure drop bar

Temperature C

Power kW

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value Vendor data Comment

Reboiler


Glycol temperature C < 204

Inlet temperature C < 150

Oversizing factor % 10 %

Operating pressure barg

Duty MMkcal/h

Average heat flux kcal/h.m2 20,000 maxi

Maximum skin temperature C 230

Coil for fuel gas: temp. outlet C 60/80

Coil for stripping gas: temp. outlet C 120/150

Design pressure barg 1.2 + liq.

Heat density for fired tubes kcal/h.cm2 < 580

Direct fired U tubes yes

Multi return tube no

Fired tube length m < 10

Fired tube dia. inches 24"

Fired tube wall thickness W. CA mm 10

Number of burner 2

Burners normal heat release MMkcal/h

Min./max. heat release MM kcal/h

Heat resistant cylinder in burner Yes

Flame detector type U.V./ion

Natural/forced draft burner natural

Chimney diameter inches

Chimney length m

Chimney insulation

Stripping column

Diameter m

Length m

Packing type PALL, SS

Packing height m 1.2

Material SS or 5 mm CA

Design pressure/temp. barg/C

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Glycol preheater

Duty MMkcal/h

Temp. inlet/out reach glycol C 45/150

Temp. inlet/out lean glycol C 195/95

Manufacturer VICARB

Type COMPABLOC

Overdesign factor on surface % 25

Surface m2

Fouling factors

Rich/lean exchanger

Duty MMkcal/h

Temp. inlet/out reach glycol C 45/150

Temp. inlet/out lean glycol C 195/95

MANUFACTURER VICARB

Type COMPABLOC

Overdesign factor on surface % 25

Surface m

2

Surge drum


Total volume m3


Retention time min.

Volume for glycol from reboiler m3

Glycol circulation pumps

Flow rate m3/h

Type and number

Temperature C < 90

NPSH R/A m

RPM

Stroke length

Static pulsation dampener:

Type Static Yes

Location Up/Downstream Yes/yes

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Final lean glycol cooler

Inlet temperature C

Outlet temperature C

Duty MMkcal/h

Area (bare tube) m2

Overdesign factor % 10

Material CS

Design pressure barg

Length x width m x m

Motor power kW

Glycol make-up facilities

Storage tank volume m3

Pump flow rate m3/h

Cartridge Filter yes

Closed drain

Drum: diameter and lengthClosed drain pump

Flow rate m3/h 15

Head bar 1

Motor power kW

Chemical injection package

Antifoam Yes

pH control Yes

Skid General Data

Glycol consumption (carry over + regen.loss)

USG/MMSCF 0.03

Overall height m -

Overall length m -

Overall width m -

Total weight t -

CO2snuffing system

Gas detection Ionisation

Fire detection IV/IR

Delivery Month

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General Specification

GS EP ECP 101

This document is the property of Total. It must not be stored, reproduced or dis closed to others without wri tten authorisation from the


FIGURE 1 TYPICAL PROCESS FLOW DIAGRAM OF GLYCOL P

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GS EP ECP 101



FIGURE 2 TYPICAL PID OF DEHYDRATION COLUMN AND GLYCOL FINAL COOLER

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GS EP ECP 101



FIGURE 3 TYPCIAL PID OF GLYCOL REGENERATION SKID (LOW CAPACITY)

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GS EP ECP 101



FIGURE 4 TYPICAL PID OF GLYCOL REGENERATION SKID (high capacity with fire tub

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GS EP ECP 101



FIGURE 5 TYPICAL PID OF GLYCOL REGENERATION SKID (high capacity with extern

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This document is the property of Total. It must not be stored, reproduced or dis closed to others without written author isation from the Company.


FIGURE 6 CONTACTOR TOP RECOMMENDED ARRANGEMENT

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FIGURE 7 LIQUID LEVELS IN DRUMS AND CONTACTOR

This document is the property of Total. It must not be stored, reproduced or d isclosed to others without w ritten authorisation from the Company.


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FIGURE 8 LIQUIDS LEVELS IN REBOILER

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FIGURE 9 EQUILIBRIUM H2O DEWPOINT VERSUS TEMPERATURE AT VARIOUSTEG CONCENTRATIONS (metric and english uni ts)

(From GPSA Engineering Data Book)

gs_ep_ecp_101_en

Documents

gs nomenclature02

gs exp

glycol skid

date notes5282018 gs

scope of supply

glycol regeneration

glycol package unit03

property of total