2b_heat exchanger equipments_ additional sec 2.1_eng

8/12/2019 2B_Heat Exchanger Equipments_ Additional Sec 2.1_ENG

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AES-VCM MONG DUONG

POWER COMPANY LIMITED Doosan Power Systems India

Volume- 2B - Heat Exchanger Equipments



AES-VCM MONG DUONG


Section 2.1 – Condenser

Section 2.2 – Condenser Vacuum Pump

Section 2.3 – Waterbox Vacuum Pump

Section 2.4 – Deaerator & Feed Water Storage Tank

Section 2.5 – HP Heater

Section 2.6 – LP Heater

Section 2.7 – Fuel Oil Heater / Return Line cooler



AES-VCM MONG DUONG


Section 2.1 – Condenser

- System Description

- P&IDs

- GA / Equipment Drawings

- Data Sheets

- O & M Manual

- Reference Drawings/Documents



- P&IDs


- Data Sheets

- SCR O & M Manual



- System Description- P&IDs




AES-VCM MONG DUONG


- Data Sheets

- ESP O & M Manual


Section 2.4 – Deaerator & Feed Water Storage Tank


- P&IDs


- Data Sheets

- FGD O & M Manual


Section 2.5 – HP Heater


- P&IDs


- Data Sheets

- FGD O & M Manual




AES-VCM MONG DUONG


Section 2.6 – LP Heater


- P&IDs


- Data Sheets

- FGD O & M Manual


Section 2.7 – Fuel Oil Heater / Return Line cooler


- P&IDs


- Data Sheets

- FGD O & M Manual




AES-VCM MONG DUONG


Section 2.1 - Condenser



AES-VCM MONG DUONG


System Description



System Description

CONDENSER

Design and performance shall be based on HEI standards. Allowable stresses for materialsused in the fabrication of shells, water boxes, tube support plates, structural supporting andreinforcing members, and connection nozzles shall be in accordance with those given in the ASME code (Division 1 only). The Condenser shall be split into two halves and capable ofoperation in part load with one half tubes taken out of service for repair and the steam turbinerunning at 50%.

The condenser at a minimum, shall be capable of:

i. Condensing the total steam flow from its associated steam turbine when operating at VWOload and at maximum cooling water temperature;

ii. Accepting the total steam system drain flows;

iii. Providing any and all required cooling medium to the auxiliary cooling system;

iv. Condensing the full capability of the steam turbine bypass system(s); and

v. Simultaneously operating with steam flow through the steam turbine and the steam turbinebypass system.

The condenser shall reduce oxygen content in condensate to a level not exceeding 0.010 cc perliter (equal to 14 ppb) maximum and a free CO2 content of zero over the entire operating rangeof the unit.The shell and hotwell plates and welds shall be provided with a corrosion allowance of 0.8 mmon each wetted side.The condenser shall be provided with sea water leak detection system.

Tubes and Tube Sheets

Tube material shall be titanium, with a minimum 25-BWG thickness. Tubes in the air removalsection of the condenser shall be a minimum 25-BWG thickness and tubes in the impingementzone shall be a minimum 22-BWG thickness. Tube velocities shall not exceed 3 m/sec.The thickness of the tube sheets shall not be less than 1.5 times the tube outside diameter.Tube support plates shall be provided with a corrosion allowance of 1.5 mm on each face. Totaltube support plate thickness, including corrosion allowance, shall not be less than 12 mm.

Hotwell

The hotwell shall be an integral part of the condenser shell. The hotwell shall have a capacitybetween normal and low level of no less than three minutes under conditions of maximum full-load condensate flow.



AES-VCM MONG DUONG


Data Sheets



AES-VCM MONG DUONG





AES-VCM MONG DUONG


System Description



How the CVP works

The main components of the vacuumpump are shown in Figure 1. An electricdrive motor is direct coupled to a pumpdrive shaft that is common to both stagesof the two-stage vacuum pump. Rotors in

each stage are rigidly mounted on theshaft and rotate at the same speed asthe shaft.

The operating principles of the vacuumpump, which is of the liquid ring type, isshown in Figure 2. A rotor revolves with-out metal contact in a circular body thatcontains a liquid compressant. The rotoris a casting consisting of a series ofblades that project from a hollow cylindri-cal hub through which the shaft is

pressed. These blades are shrouded atthe sides and form a series of chambers.The curvature of the blades is in the di-rection of rotation. The body is offsetfrom the centerline of the shaft.

Starting in view A, Figure 2, the rotorchambers are filled with liquid compres-sant. The liquid compressant rotateswith the rotor, but follows the contour ofthe body, and it recedes into the body asthe rotor advances (as shown in view B)

and empties the rotor chamber.

The converging body forces the liquidcompressant back into the rotor cham-ber, as shown in view C, until the rotorchamber is full again. This cycle occursonce during each revolution of the rotor. As the liquid compressant recedes fromthe rotor chamber in view B, the liquidcompressant is replaced by air drawnthrough an inlet port in the stationarycone that connects to the pump inlet. As

the rotor turns through 360 degrees andliquid compressant is forced by the bodyback into the rotor chamber, the air thathas filled the chamber is forced throughdischarge ports of the cone to the pumpdischarge, as shown in view D.

Evacuated gas and liquid compressantare discharged by the first stage of thevacuum pump into the second stage dis-charge manifold. During low-vacuumoperation, a check valve in the second

stage manifold is open, allowing the firststage discharge to flow directly to an ex-ternally located atmospheric dischargeseparator. Thus, at low vacuum, only thefirst stage of the vacuum pump performsan evacuation function. During high-vacuum operation, the check valve isautomatically closed. The first stage dis-charge is then routed to the inlet of thesecond stage and through the secondstage before being discharged through-the second stage manifold to the separa-

tor. Operation under low- and high-vacuum conditions is shown in Figure 3.

Liquid compressant (seal water) is ap-plied to the vacuum pump to provide themakeup for the liquid in the pump, and toseal the clearances between the coneand rotor. The liquid compressant entersthe vacuum pump at the first stageheads. It then flows through a passagein the heads to the cones and throughthe clearance between the cones and

rotor into the rotor chamber. Liquid com-pressant is discharged with the evacu-ated gas into the second stage manifold.From the second stage manifold itpasses directly into the atmospheric dis-charge separator (low-vacuum operation)or flows into the second stage inlet (high-vacuum operation) before being dis-charged with the evacuated gas into theseparator.

Stuffing boxes on the vacuum pump at

the first stage heads contain packingrings and, in the first stage stuffing boxesonly, lantern gland seals. These stuffingboxes are lubricated by the liquid com-pressant. Liquid compressant is appliedto the lantern glands under a pressure of

Gardner Denver Nash 14 Operation & Maintenance OM 5003 EN

Contents subject to change AT Edition 02/2009 A1



2 to 5 psig (115 to 136 kPa) from thesecond stage shroud (bracket). The sealthereby provided prevents atmosphericair from entering the vacuum pumpthrough the stuffing boxes.

B

Low pressure caused byreceding of liquid compressant

from rotor sector draws airthrough the inlet port

Centrifugal force empties rotorsector, forcing liquid compressant

toward body casing

Rotation ofrotor A

Liquid compressant fillsrotor sector

Air is compressed byconverging liquidcom ressant

Liquid compres-sant is forcedback towardcenter of rotorsector

Liquid cpressaand copressedare dis-chargethroughcone dicharge

CD

Figure 2: Vacuum Pump Operating Principles

1. Shaft 2. Body 3. Rotor 4. Cone





Low Vacuum Operation

High-Vacuum Operation

Figure 3: Low- and High-Vacuum Operation 1 Air Inlet2 Interstage Piping3 Discharge to Atmospheric Separator4 Check Valve





9 2013.06.11 TI.UM SD.CHOI CH.CHUN Added heat exchanger tag no.

8 2013.01.29 TI.UM SD.CHOI CH.CHUN Changed drain line number.

7 2013.01.11 TI.UM SD.CHOI CH.CHUN Added valves changed line number.

6 2013.01.03 TI.UM SD.CHOI CH.CHUN Added ball valves for maintenance.

Rev Date Prepared Checked Approved Details of RevisionOwner :

Consultant

Contractor

Project

Mong Duong II 2 x 560MW(NET)

COAL FIRED POWER PROJECT

PC T10206

UAS XG02

UNIT P0

Title

Condenser Vacuum Pump - P & I Diagram

KKS MAJ

Reg. No. 410001

Rev. 9

Document No.

T10206-XG02-P0MAJ-410001Page-No.

1 of 2

AES-VCM MONG DUONG

POWER COMPANY LIMITED

POWER ENGINEERING CONSULTING

JOINT STOCK COMPANY 2

Doosan Heavy Industries & Construction Co., Ltd.



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AES-VCM MONG DUONG


Operation & Maintenance Manual



AES-VCM MONG DUONG





AES-VCM MONG DUONG


System Description



Water Boxes

The water boxes shall be constructed of steel complying with the requirements of ASME Boiler& Pressure Vessel Code Section VIII or equivalent acceptable internationally recognizedStandard. The water boxes shall be rubber lined or epoxy coated.

Water box plates and welds shall be designed with a corrosion allowance of 1.5 mm on eachwetted side. Water boxes and nozzles shall be rubber lined to protect against corrosive riverwater.

Each water box shall be provided with eye bolts or lugs for lifting.Water box drains shall permit complete waterside draining in 15 minutes. Necessary supportsshall be provided for people working inside the water box during such cleaning of debris thatmay pass through the Water Intake band screen and online debris filters and periodicinspection.

Tube Cleaning System

The sponge type ball cleaning system shall be provided for online cleaning of debris blockingcondenser tube inlets and deposits inside the tubes. The system shall be complete with ballrecirculation pumps, ball charging and collection piping, motor operated ball collection strainers,differential pressure indicating transmitter for ball strainer, local control panel, ball sizemeasuring tray, ball counter, etc. In case of strainer jamming by debris, they can be opened byapplying external torque with specially designed tool to be supplied by the vendor. The systemcan be operated locally and from the control room. The control panel shall be located atelevation above potential flooding by recalculating water or condensate drain.

Evacuation System

Each condenser shell shall be provided with an air-removal section designed to prevent any

stagnant accumulation of air, non-condensable gases, and corrosive vapors.

Air off-take piping from each air-removal section shall be located at the cold end of the coolingwater circuit terminating outside the shell.

The evacuation system shall include two 100%-capacity systems mounted on skids, includingpiping, valves, controllers, and other accessories.

The system design shall allow operation of a single system to maintain vacuum during thenormal operating condition. The evacuation system shall provide the capability to permit theturbine generator to accept full load within 30 minutes of startup. Provisions shall beincorporated in equipment design to prevent loss of vacuum by backflow of air from atmospheric

pressure through the equipment into the condenser. Vacuum system suction and dischargepiping shall be continuously sloped and be free from non-drainable pocketed areas.



10 2013.06.11 TI.UM SD.CHOI CH.CHUN Changed tag no. for suction valves and added heat exchanger tag no.

9 2013.04.09 TI.UM SD.CHOI CH.CHUN Changed line number and added valve tag number.

8 2013.01.29 TI.UM SD.CHOI CH.CHUN Changed drain line number.

7 2013.01.11 TI.UM SD.CHOI CH.CHUN Added gate valves for drain, changed line number and deleted vent ball valves..

Rev Date Prepared Checked Approved Details of RevisionOwner :

Consultant

Contractor

Project



PC T10206

UAS XG02

UNIT P0

Title

Waterbox Vacuum Pump-P & I Diagram

KKS MAJ

Reg. No. 410002

Rev. 10

Document No.

T10206-XG02-P0MAJ-410002Page-No.

1 of 2

AES-VCM MONG DUONG







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AES-VCM MONG DUONG





AES-VCM MONG DUONGPOWER COMPANY LIMITED

Doosan Power Systems India

Guideline for O&M Manual

The O&M Manual submitted by Vendor for this equipment is

quite extensive. This volume consists only a part of this O&M

Manual that will give overall view to the operation and

maintenance personnel. However, if you need more detailed

manual of this equipment which includes all drawings and

catalogs the same is available in Volume - 5



1 2013.07.16 T.I.UM S.D.CHOI H.D.KIM For Construction

0 2012.11.26 T.I.UM S.D.CHOI H.D.KIM For Construction

Rev Date Prepared Checked Approved Details of Revision

Owner :

Consultant

Contractor

Project



PC T10206

UAS CH01

UNIT P0

Title

Waterbox Vacuum Pump

Operation and Maintenance Manual

KKS ZEN

Reg. No. 410003

Rev. 1

Document No.T10206-CH01-P0ZEN-410003

Page-No.1 of 48

AES-VCM MONG DUONG







AES-VCM MONG DUONG


Section 2.4 - Deaerator & Feed Water StorageTank



AES-VCM MONG DUONG


System Description



Deaerator

A deaerator shall also be provided as a stage of feedwater heating. The deaerator shall be atray/spray-type heater consisting of a heater and storage tank. The storage tank will be sized tosupply feedwater to the feedwater pumps for more than 5 minutes at BMCR load operation withthe tank at normal operating level. The deaerator shall be guaranteed to remove all dissolved

oxygen in the feedwater in excess of 0.005 cc/liter (7 ppb) at all loads up to and including themaximum rated capacity, and during start-up and steam bypass operation. The deaerator shallbe complete including, but not limited to, level control; vacuum breaker; gauge glass standpipe;two-gauge glass kits; pressure gauge; safety relief valve(s); two thermometers; high-, high-high,low-, and low-low level alarm switches; and overflow system. Design of the deaerator shallincorporate the following features:

Heater and storage section and appurtenances shall conform to the ASME Boiler andPressure Vessel Code, Section VIII, Pressure Vessels, Division 1 and to all internationaland local safety requirements that may govern.

Heater design shall provide for a minimum 1.6 mm corrosion allowance.

All shells and heads shall be constructed of carbon steel plates conforming to ASME SA-515, Grade 70, or ASME SA-516, Grade 70.

Suitable means of access shall be provided for all internal parts. A suitable door shall beprovided above the water level for removal of trays or for access to the heater section.The heater and storage section shall each have a davitted manway. Doors, manholes,handholes, and frames shall be the same material as the shell. Access openings shallbe hinged or equipped with davit assembly and shall be provided with permanent-typegaskets.

Tray system shall consist of completely interchangeable stainless steel trays. Tray

supports, tray enclosure, and other internal parts coming in contact with noncondensablegases or non-deaerated water shall be constructed of or lined with stainless steel.

The deaerating heater shall be provided with supports capable of supporting the entireweight of the unit (heater and storage section) with all spaces flooded. The minimumclearance between the bottom of the supports and the bottom of the storage tank shallbe 228 mm.

Each storage section water outlet shall be provided with a weir of sufficient height toprevent foreign objects or sludge from entering the pump suction piping. A grid-typestrainer shall be provided over each storage section water outlet. The strainer shall be ofheavy-duty construction and shall be firmly attached. Each storage section water outlet

shall be provided with vortex-eliminating baffles.

Vent condenser shall be of the internal type, mounted within the heater section andarranged to properly condense the condensable portion of the vent mixture and vent thenoncondensable gases to the atmosphere.



AES-VCM MONG DUONG


Section 2.5 - HP Heater



AES-VCM MONG DUONG


System Description



Closed Feedwater Heaters

Seven stages of horizontal, full-capacity, U-tube feedwater heaters with stainless steel (SS)-304tubes. The low-pressure heaters and high-pressure heaters shall be designed in accordancewith HEI standards for closed feedwater heaters and shall be constructed in accordance withthe ASME Code, Section VIII. Except HP heater No. 6 and 7, each heater shall be provided with

full capacity individual bypass complete with isolation valves and be capable of individuallybypassed in the event it is out of service while the Unit is in operation. HP heater No. 6 and 7shall be bypassed in group.

With the No. 8 HP heater out of service and bypassed, the Unit shall be capable of generatingthe guaranteed electrical output.

Each heater shall be designed, constructed, tested, and inspected in strict accordance with theapplicable requirements of the ASME Boiler and Pressure Vessel Code, Section VIII, PressureVessels, Division 1. Requirements of the HEI standards for closed feedwater heaters shallapply. Each heater shall also be in compliance with all international and local codes that maygovern.

The maximum temperature permitted for carbon steel pressure parts shall be 412°C; chrome-moly steel shall be used above 412°C.

Design of heaters shall incorporate the following features:

Access manways through hemi-head channels shall be 450-mm minimum ID to providemaximum accessibility for inspection, cleaning, and repair. The manway shall be ofgasketed configuration and not require a welded diaphragm connection. Low-pressureheaters shall have full access channel covers.

Facilities for drainage of steam and water spaces without breaking piping connections,

except provisions for drainage of water spaces in vertical U-tube heaters, will not berequired.

Drain inlet and steam inlet openings on all heaters shall be provided with heavy internal-welded stainless steel impingement baffle plates designed to prevent vibration and toprevent tube erosion.

Suitable lifting attachments shall be provided on each heater to facilitate access to tubebundle for maintenance.

Heater shells shall be provided with a suitable number of adequately sized ventconnections, including vent orifices, located and sized to ensure proper venting under all

load conditions.



AES-VCM MONG DUONG


Section 2.6 - LP Heater



AES-VCM MONG DUONG


System Description



Closed Feedwater Heaters

Seven stages of horizontal, full-capacity, U-tube feedwater heaters with stainless steel (SS)-304tubes. The low-pressure heaters and high-pressure heaters shall be designed in accordancewith HEI standards for closed feedwater heaters and shall be constructed in accordance withthe ASME Code, Section VIII. Except HP heater No. 6 and 7, each heater shall be provided with

full capacity individual bypass complete with isolation valves and be capable of individuallybypassed in the event it is out of service while the Unit is in operation. HP heater No. 6 and 7shall be bypassed in group.

With the No. 8 HP heater out of service and bypassed, the Unit shall be capable of generatingthe guaranteed electrical output.

Each heater shall be designed, constructed, tested, and inspected in strict accordance with theapplicable requirements of the ASME Boiler and Pressure Vessel Code, Section VIII, PressureVessels, Division 1. Requirements of the HEI standards for closed feedwater heaters shallapply. Each heater shall also be in compliance with all international and local codes that maygovern.

The maximum temperature permitted for carbon steel pressure parts shall be 412°C; chrome-moly steel shall be used above 412°C.

Design of heaters shall incorporate the following features:

Access manways through hemi-head channels shall be 450-mm minimum ID to providemaximum accessibility for inspection, cleaning, and repair. The manway shall be ofgasketed configuration and not require a welded diaphragm connection. Low-pressureheaters shall have full access channel covers.

Facilities for drainage of steam and water spaces without breaking piping connections,

except provisions for drainage of water spaces in vertical U-tube heaters, will not berequired.

Drain inlet and steam inlet openings on all heaters shall be provided with heavy internal-welded stainless steel impingement baffle plates designed to prevent vibration and toprevent tube erosion.

Suitable lifting attachments shall be provided on each heater to facilitate access to tubebundle for maintenance.

Heater shells shall be provided with a suitable number of adequately sized ventconnections, including vent orifices, located and sized to ensure proper venting under all

load conditions.



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AES-VCM MONG DUONG


Refer Engineering Database



AES-VCM MONG DUONG


Section 2.7 - Fuel Oil Heater / Return Line cooler



AES-VCM MONG DUONG





AES-VCM MONG DUONG


System Description



Fuel Oil Heater / Return Line Cooler

Secondary Fuel Oil Unloading Heater

There are One (1) Secondary Fuel Oil unloading steam heaters. The heater is designed

to heat a flow of 82 cubic meters per hour of Secondary Fuel Oil from 30ºC to 50ºC

Secondary Fuel Oil Heater

There are Two (2) Secondary Fuel Oil steam heaters. The heaters are designed to heata flow of 65 cubic meters per hour of Secondary Fuel Oil from 55ºC to 120ºC.Secondary Fuel Oil Return Line Cooler

There is One (1) Secondary Fuel Oil Return Line Cooler. The cooler is designed to coolSecondary Fuel Oil from 120ºC to 55ºC.