m.sc)( (ngl1200) - srbiau.ac.irsrbiau.ac.ir/files/environment/24583.pdf... fundamentals of natural...
Post on 26-May-2018
218 Views
Preview:
TRANSCRIPT
Islamic Azad University
Science & Research Campous
Master Science Energy Engineering Thesis
Subject
Improvement of energy utilization in Gachsaran NGL unit 1200 through reducing electricity consumption and increasing
the fractionate efficacy of demethanizer column
Superwiser Professor
Dr. H. Farzaneh
Consulant Professors
Dr.H. Reza Moghadam
Dr. A. Asghar Hamidi
Author
B. Abbasgholi
1388-1389
.............................................................................................................................
.................................................................................................................................
: ..........................................................................
-- .........................................................................................................
-- ..................................................................................................
-- ......................................................................................................
-- ) ( ............................................................................................
-- - ...................................................................................
-- - ................................................................ .............
-- ...............................................................................................................
-- - ..............................................................................................
-- ...................................................................................................................
-- ................................................................................................................
:NGL1200
-- ..............................................................................
-
-UTILITY ........................................................................................................
-- ......................................................................................................
-- .............................................................................................
-- ...............................................................................................................
-- .....................................................................................................
-- ......................................................................................................
-
- ............................................................
-- .................................................................................................................
-
-ACID ...............................................................
-- ......................................................................................................
-- .................................................................................................
: 1200 NGL
--HYSYS ....................................................................................
:NGL
--Turbo- Expanding ...........................................................
-- ........................................................................................................
-- .................................................................................
-- ..........................................
:
NGL
........................................................................................................
-- .........................
-- - .................................................................................................................
-- - ....................................................................................................
-- - ............................................................................................
-- -
................................................................................................ .............
-- - ................................ ............
--SGR ....................................................................................................
-- - ...........................................................................................................
:
................................................................................................................................
-- ................................................................ .............
-- - ....................................................................................
-- - .......................................................................................................
-- -PBR ...........................................................................................
.........................................................................................................................
...........................................................................................................................
...............................................................................................................................
......................................................................................................................
.....................................................................................................................
............................................................................................................................................
) -( ..............................................................................................
) -(NGL1200 ...........................................................................
) - (NGL1200 ......................................................
) -(NGL1200 .........................................................
) - (NGL1200)Turbo Expanding ( ....................................
) - (NGL1200
)Turbo ExpandingCCHP( .............
) -
(NGL1200)SGR ( ...............................
) -( ..........................................................................................
) -(SGR .................................
)
- ( .................................................................................................
) - (NGL .................................................................................
) -( ........................................................................
) -(SGR .........................................................................
) -(NGLSGR ...................................................................................
) - ( .......................................................................................
) - (SGR ........................................................................................
) ( .......................................................................................
) (SGR
................................................................................................................
:
-
-
3-A.J.Kinday,W. R.parrish , fundamentals of natural gas processing , Taylor
and Francis Group , Boca Raton , Londen, New York,2006
4-A. J. Kidnay &W. Parrish (2006) Fundamental Natural Gas processing, GPP.INC
5-B.Tirandazi, M.Mehrpooya, A.Vatani , effect of the valve pressure drop in exergy analysis of c2+ recovery plants refragiration cycle , international jornal of electrical power and energy systems engineering 1(4)(2008)
6-D.W. Wu, R.Z. Wang-,2006 Combined cooling, heating and power, GPP.INC
7-G.Yao,J.J.Chen,S.Land , D.G.Elliot, enhanced recovery process, patent 5,992,175(1999)
8- HVAC System and Equipment Hand book,2008,SI edition
9- L. Giaccone, A. Canova,2009, Economical comparison of CHP systems for
industrial user with large steam demand, GPP.INC
10-L.Roger Chen,J. yao,Retrofit for NGL Recovery Performance Using a Novel
Stripping Gas Refrigeration Schem.IPSIllc,Hostune,Texas USA
11 - J.H .Horlock,2003 ,Advanced Gas Turbine Cycle ,Thirth Edittion,
GPP.INC
12- J.P. Berry, Cogeneration Potential in Western Canada, Marcel Dekker,INC
,second edition
13- M.Peters ,K. B.Time ,2003, Plant Design &Economics For Chemical
Engineering ,Forth edition,McGraw-Hill
14-M. Kanoglu , I. Dincer ,2009,Performance assessment of cogeneration
plants,CRC press
15- G. Chicco, P.Mancarella,2008 ,Assessment of the Models and indicators
greenhouse gas emissions from cogeneration and trigeneration
systems,Campbell petrelium series
16- M.Kamaruddin, A. Hamid,2008,HYSYS An Introduction to Chemical
Engineering Simulate,department chemical engineering Maleysia
17-M.Mehrpooya, A.vatani, S.M.A.Mosavi,2010,Introduction a novel
integrated NGL recovery process configuration with minimum energy
requirment.jornal Elsevier chemical engineering proccessing49(2010)376-388
18- M.V. Biezma, J.R. San Cristo´bal ,2006,Investment criteria for the selection
of cogeneration plants,
19-R.J.Lee,Y.Z.Jame,S.Y.Juh,D.G.Elliot,International refrigeration for enhanced NGl recovery , us,patent 2006(150,627)
20- S. mokhatab&W .Pot&J.Speight (2006) Natrul Gas Transmission
&Processing, GPP.INC
21-S. Papile,1989, Natural Gas Liquid Plant Optimization And Aplication of
L inear Program, McGraw-Hill
22-W. Lyones (2007) Standard Hand Book Of petroleume &Natrul Gas
Engineering,Thirth edition,Elsevier
W. County&north Dakota (2007) Natural gas engineering, McGraw-Hill -23
24-X.Q. Kong, R.Z. Wang, X.H. Huang, 2004,Energy efficiency and economic
feasibility of CCHP driven by stirling engine, McGraw-Hill
Subject: Improvement of energy utilization in Gachsaran NGL unit 1200 through
reducing electricity consumption and increasing the fractionate efficacy of
demethanizer column
Superwiser: Dr. H. Farzaneh
Counsulants Professor: Dr.H. R. Moghadam Dr. A.H amidi
Author: B.Abbasgholi
Abstract:
In recent years, there has been great incentive to improve the energy utilization with which
the existing capital in offshore and onshore surface facilities is utilized. On of the most
energy intensive process in oil upstream industry is natural gas liquid or NGL recovery plant.
Recovery of natural gas liquids (NGL) components in gas not only may be required for
hydrocarbon dew point control in a natural gas stream, but also yields a source of revenue,
e.g., natural gas may include up to about fifty percent by volume of heavier hydrocarbons
recovered as NGL. Most of the NGL plants in operation today use conventional single-stage
turbo expander technology for moderately high ethane recovery. Based on this technology,
after the inlet gas is treated to remove water and other contaminants, it s cooled by cold
residue gas in gas/gas exchangers. Propane refrigeration is often required to help in
condensing the heavy components for a rich gas. Then, liquid condensed from the inlet gas is
separated and fed to the tower for further fractionation after being flashed to the tower
pressure. The remaining non-condensed vapor portion is subject to turbo-expansion to the top
section of the demethanizer column, with the cold liquids acting as the top reflux to enhance
recovery of heavier hydrocarbon components. The main gorge of energy consumption in
conventional NGL plants is propane refrigeration. Hence, more attention should be focused
on the effective utilization of propane chillers in a NGL plant. In this study, a novel process
configuration for recovery of natural gas liquids in NGL plant is purposed. The required
refrigeration in this configuration is obtained by a self-refrigeration system. The novel
process utilizes a slipstream from the demethanizer bottom. This stream is totally or partially
vaporized, providing additional refrigeration for inlet gas cooling. The flashed vapor
generated from the self-refrigeration cycle is recycled back to the column, where it serves as
stripping gas. Stripping gas increases the critical pressure thus enhancing the relative
volatility. In summary, the novel scheme generates refrigeration internally, decreasing
cooling load of propane chiller and providing additional refrigeration for inlet gas cooling
due to plant capacity increase. Besides, the recycled stripping gas also eliminates the need for
external reboiler heat. The warmer the stripping gas, the less demand is placed upon the
bottom reboiler, thereby saving fuel and energy cost. In this investigation, a simulation model
has been developed on the basis of using novel configuration in Gachsaran NGL1200 in
south of Iran. The model has been applied for evaluating of energy utilization in this plant.
Results of the model show decreasing in total electricity demand of the plant from
164/5kWh/tNGL to 175 kWh/tNGL by decreasing cooling load and electricity consumption in
propane chiller. Also, the need for reboiler heat is satisfied .Finally, economical analysis of
the new retrofit has been studied.
top related