[go: up one dir, main page]

US20070177969A1 - Method of power generation from pressure control stations of a natural gas distribution system - Google Patents

Method of power generation from pressure control stations of a natural gas distribution system Download PDF

Info

Publication number
US20070177969A1
US20070177969A1 US10/598,739 US59873905A US2007177969A1 US 20070177969 A1 US20070177969 A1 US 20070177969A1 US 59873905 A US59873905 A US 59873905A US 2007177969 A1 US2007177969 A1 US 2007177969A1
Authority
US
United States
Prior art keywords
natural gas
turbine
pressure control
pressure
distribution system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/598,739
Other languages
English (en)
Inventor
Jose Lourenco
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tri Gas and Oil Trade SA
Original Assignee
Tri Gas and Oil Trade SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tri Gas and Oil Trade SA filed Critical Tri Gas and Oil Trade SA
Assigned to TRI GAS & OIL TRADE SA reassignment TRI GAS & OIL TRADE SA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LOURENCO, JOSE
Publication of US20070177969A1 publication Critical patent/US20070177969A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
    • F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether

Definitions

  • the present invention relates to method of generating power from pressure control stations of a natural gas distribution system.
  • Natural gas distribution systems use three types of natural gas pipeline networks:
  • high pressure approximately 1,000 psig
  • medium pressure approximately 100 psig
  • low pressure approximately 5 psig
  • the pressure must be reduced from 1000 psig to 100 psig.
  • the pressure must be reduced from 100 psig to 5 psig. This is done through a series of pressure reducing control valves at facilities known as Pressure Control Stations.
  • the natural gas is pre-heated at the Pressure Control Stations before pressure is reduced, with a view to maintaining an outlet temperature of 5 degrees Celsius.
  • the mode of preheating the natural gas upstream of the pressure control valves is by consuming some of the natural gas in a hot water or low pressure steam boiler, which supplies heat to a heat exchanger. The heat exchanger is then used to preheat the incoming natural gas.
  • a method of generating power from a pressure control station of a natural gas distribution system involves channeling natural gas entering the pressure control station into a turbine which is powered by expansion of the natural gas as the pressure of the natural gas is reduced.
  • a second step involves capturing the output of the turbine for application for useful purposes.
  • the method described above utilizes energy that is presently lost across the stem of the pressure control valves and utilizes it in a form of turbine which is powered by expanding gases, commonly known as a Turbo-expander.
  • FIG. 1 labelled as PRIOR ART is a schematic diagram of a Pressure Control Station.
  • FIG. 2 is a schematic diagram of a Pressure Control Station constructed in accordance with the teachings of the present invention.
  • a high pressure pipeline network is indicated by reference numeral 12 and a low pressure pipeline network is indicated by reference numeral 14 .
  • a Pressure Control Station Interposed between high pressure pipeline network 12 and low pressure pipeline network 14 is a Pressure Control Station generally indicated by reference numeral 16 .
  • High pressure natural gas flowing from high pressure pipeline network 12 passes through a first line shut off valve 18 , a course control valve assembly, generally indicated by reference numeral 20 , a fine control valve assembly 22 , before encountering a second line shut off valve 24 .
  • a boiler 26 with an associated heat exchanger 28 is positioned on a diversion loop 30 .
  • Three valves 32 are provided which control the feed of natural gas into and out of heat exchanger 28 .
  • Natural gas is pre-heated in heat exchanger 28 .
  • the pre-heated natural gas is then directed through a series of pressure reducing control valves 34 .
  • a third line shut off valve 36 enables Pressure Control Station 16 to be isolated from low pressure pipeline network 14 .
  • a fuel gas supply conduit 38 diverts some of the processed low pressure natural gas for use in fueling boiler 26 .
  • the principle of operation is to preheat the natural gas in heat exchanger 28 to avoid the production of hydrates when the natural gas passes through the series of pressure reducing control valves 34 .
  • the energy generated as the pressure of the natural gas is produced is lost at pressure reducing control valves 34 .
  • energy input is needed in the form of gas consumption to power boiler 26 . There is, therefore, a net energy loss.
  • FIG. 2 a configuration in accordance with the present method is illustrated as being super-imposed upon the PRIOR ART Pressure Control Station of FIG. 1 . It is envisaged that the existing infrastructure will be kept in place to maintain redundant systems for reasons of public safety.
  • natural gas is diverted by passing heat exchanger 28 and series of pressure reducing control valves 34 .
  • a key aspect of the present method is channeling natural gas entering Pressure Control Station along line 50 and into a turbine 52 which is powered by expansion of the natural gas as the pressure of the natural gas is reduced. The output of turbine 52 is then captured for application for useful purposes. It is preferred that the turbine be used to power an electrical generator 54 .
  • the use of turbine 52 can be done either with or without the natural gas being pre-heated, as will hereinafter be further described.
  • Turbine 52 is preferably a turbine known as a “turbo-expander”. It is a radial inflow turbine with variable inlet guide vanes for flow control, which are used to extract energy from a gas stream.
  • the method uses the turbo-expander (turbine 52 ) to generate power in Pressure Control Stations 16 in a natural gas distribution system.
  • the expansion across the inlet guide vanes and expander wheel produces torque and therefore shaft power that can be used to turn power generator 54 .
  • turbine 52 can be used without preheating the natural gas.
  • the natural gas is channeled into turbine 52 , with a view to intentionally generating cold temperatures.
  • a heat exchanger 56 is provided to capture the cold temperatures generated for use in either refrigeration or air conditioning.
  • a fluid circulation can then be provided through heat exchanger 56 which can be used for air conditioning of nearby facilities or refrigeration of nearby cold storage warehouses.
  • the refrigeration achieved by expansion of the gas is usually much more than achieved by Joule-Thompson (J-T) expansion across a valve.
  • J-T Joule-Thompson
  • boiler 26 replaced by a gas fueled turbine power generator 58 , sometimes referred to as a “micro-turbine”.
  • a portion of the high pressure natural gas is diverted along conduit 60 and passed through a gas conditioning system 62 to condition the natural gas so that the natural gas is suitable to power gas fueled turbine power generator 58 .
  • Exhaust gases from gas fueled turbine power generator flow along conduit 64 and are passed through a first heat exchanger 66 .
  • a hot water circulation circuit is provided which includes expansion tank circulation conduit 68 , expansion tank 70 , a pump 74 and valves 76 .
  • Expansion tank 70 provides make up water for circulation conduit 68 , as required.
  • Pump 74 is used to circulate hot water through circulation conduit 68 .
  • Water is circulated through conduit 68 , which passes heat exchanger 66 , so that a heat transfer takes place with the hot exhaust gases from gas fueled turbine power generator 58 and heating the water.
  • the exhaust gases are then released to atmosphere.
  • a secondary heat exchange then takes place in a second heat exchanger 78 between the hot water and the natural gas.
  • the natural gas, which has been preheated in second heat exchanger 78 is then channeled through line 50 to turbine 52 .
  • the output of gas fueled turbine power generator 58 is also captured for useful purposes of power generation through generator portion 54 .
  • the intent of the method is to capture and use energy that is currently being wasted. Depending upon the circumstances, it may be desirable to position a dehydrator upstream of second heat exchanger 78 , to dry the natural gas.
  • Suitable dehydrators which use absorbent medium are well known in the art. Normally two are used. One is always in service, while the absorbent medium in the other is being regenerated. Of course, where the objective is to generate low temperatures for the purpose of air conditioning or refrigeration, the hot water circulation circuit will not be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Control Of Eletrric Generators (AREA)
US10/598,739 2004-03-09 2005-03-09 Method of power generation from pressure control stations of a natural gas distribution system Abandoned US20070177969A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CA2461086A CA2461086C (fr) 2004-03-09 2004-03-09 Methode de production d'energie a partir de postes de commande de la pression d'un systeme de distribution de gaz naturel
CA2461086 2004-04-09
PCT/CA2005/000359 WO2005085603A1 (fr) 2004-03-09 2005-03-09 Procede de generation d'energie a partir de postes de regulation de pression d'un systeme de distribution de gaz naturel

Publications (1)

Publication Number Publication Date
US20070177969A1 true US20070177969A1 (en) 2007-08-02

Family

ID=34916939

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/598,739 Abandoned US20070177969A1 (en) 2004-03-09 2005-03-09 Method of power generation from pressure control stations of a natural gas distribution system

Country Status (10)

Country Link
US (1) US20070177969A1 (fr)
EP (1) EP1723314A4 (fr)
BR (1) BRPI0507437A (fr)
CA (1) CA2461086C (fr)
IL (1) IL177976A0 (fr)
MX (1) MXPA06010263A (fr)
NO (1) NO20064377L (fr)
RU (2) RU2006135344A (fr)
UA (1) UA86795C2 (fr)
WO (1) WO2005085603A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102383870A (zh) * 2011-11-17 2012-03-21 重庆川然节能技术有限公司 自适应后端负荷变化的天然气压差发电系统
US20170059091A1 (en) * 2015-08-28 2017-03-02 Chevron U.S.A. Inc. Energy recovery from reduction in pressure of a dense phase hydrocarbon fluid
CN110230771A (zh) * 2019-06-06 2019-09-13 上海航天智慧能源技术有限公司 一种可移动冷能发电装置的lng气化系统
CN114622961A (zh) * 2020-12-10 2022-06-14 中国石油化工股份有限公司 一种天然气余压发电和制冰循环利用系统及利用方法
CN119572944A (zh) * 2023-09-05 2025-03-07 中国石油天然气股份有限公司 一种天然气压力能发电调压装置及方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1905948B1 (fr) 2006-09-12 2012-10-24 Cryostar SAS Machine de récuperation de l'énergie
DE102014216755A1 (de) 2014-08-22 2016-02-25 Rwe Deutschland Ag Verfahren zur Stromerzeugung innerhalb eines Gasnetzes sowie Gasdruckentspannungseinrichtung zur Verwendung bei dem Verfahren
CN109322745A (zh) * 2017-07-31 2019-02-12 上海电气燃气轮机有限公司 天然气加热系统、调压站和燃气轮机联合循环机组
CN110185506B (zh) * 2019-05-27 2022-02-08 西南石油大学 一种天然气调压站压力能综合利用系统
CN114165291B (zh) * 2021-10-22 2023-11-24 上海工程技术大学 一种气动叶轮

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608323A (en) * 1967-01-31 1971-09-28 Liquid Air Canada Natural gas liquefaction process
US3735600A (en) * 1970-05-11 1973-05-29 Gulf Research Development Co Apparatus and process for liquefaction of natural gases
US5337554A (en) * 1990-12-03 1994-08-16 Asea Brown Boveri Ltd. Method for reducing the pressure of a gas from a primary network
US5372010A (en) * 1992-07-10 1994-12-13 Mannesmann Aktiengesellschaft Method and arrangement for the compression of gas
US5394686A (en) * 1992-06-26 1995-03-07 Texaco Inc. Combined power cycle with liquefied natural gas (LNG) and synthesis or fuel gas
US5425230A (en) * 1992-05-25 1995-06-20 Aktsionernoe Obschestvo "Kriokor" Gas distribution station with power plant
US5473900A (en) * 1994-04-29 1995-12-12 Phillips Petroleum Company Method and apparatus for liquefaction of natural gas
US6167692B1 (en) * 1998-06-29 2001-01-02 General Electric Co. Method of using fuel gas expander in power generating plants
US20030177785A1 (en) * 2002-03-20 2003-09-25 Kimble E. Lawrence Process for producing a pressurized liquefied gas product by cooling and expansion of a gas stream in the supercritical state
US7272932B2 (en) * 2002-12-09 2007-09-25 Dresser, Inc. System and method of use of expansion engine to increase overall fuel efficiency

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58106109A (ja) * 1981-12-18 1983-06-24 Chiyoda Chem Eng & Constr Co Ltd タ−ビンによるｌｎｇからの動力回収法
US4995234A (en) * 1989-10-02 1991-02-26 Chicago Bridge & Iron Technical Services Company Power generation from LNG
EP0596143A4 (fr) * 1992-05-25 1994-12-07 Aktsionernoe Obschestvo Kryoko Station de distribution de gaz a installation de production d'energie.
TW432192B (en) * 1998-03-27 2001-05-01 Exxon Production Research Co Producing power from pressurized liquefied natural gas
EP1781902A4 (fr) * 2004-07-14 2009-08-12 Fluor Tech Corp Configurations et procedes de production d'energie avec regazeification integree de gaz naturel liquefie

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3608323A (en) * 1967-01-31 1971-09-28 Liquid Air Canada Natural gas liquefaction process
US3735600A (en) * 1970-05-11 1973-05-29 Gulf Research Development Co Apparatus and process for liquefaction of natural gases
US5337554A (en) * 1990-12-03 1994-08-16 Asea Brown Boveri Ltd. Method for reducing the pressure of a gas from a primary network
US5425230A (en) * 1992-05-25 1995-06-20 Aktsionernoe Obschestvo "Kriokor" Gas distribution station with power plant
US5394686A (en) * 1992-06-26 1995-03-07 Texaco Inc. Combined power cycle with liquefied natural gas (LNG) and synthesis or fuel gas
US5372010A (en) * 1992-07-10 1994-12-13 Mannesmann Aktiengesellschaft Method and arrangement for the compression of gas
US5473900A (en) * 1994-04-29 1995-12-12 Phillips Petroleum Company Method and apparatus for liquefaction of natural gas
US6167692B1 (en) * 1998-06-29 2001-01-02 General Electric Co. Method of using fuel gas expander in power generating plants
US20030177785A1 (en) * 2002-03-20 2003-09-25 Kimble E. Lawrence Process for producing a pressurized liquefied gas product by cooling and expansion of a gas stream in the supercritical state
US7272932B2 (en) * 2002-12-09 2007-09-25 Dresser, Inc. System and method of use of expansion engine to increase overall fuel efficiency

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102383870A (zh) * 2011-11-17 2012-03-21 重庆川然节能技术有限公司 自适应后端负荷变化的天然气压差发电系统
US20170059091A1 (en) * 2015-08-28 2017-03-02 Chevron U.S.A. Inc. Energy recovery from reduction in pressure of a dense phase hydrocarbon fluid
CN110230771A (zh) * 2019-06-06 2019-09-13 上海航天智慧能源技术有限公司 一种可移动冷能发电装置的lng气化系统
CN114622961A (zh) * 2020-12-10 2022-06-14 中国石油化工股份有限公司 一种天然气余压发电和制冰循环利用系统及利用方法
CN119572944A (zh) * 2023-09-05 2025-03-07 中国石油天然气股份有限公司 一种天然气压力能发电调压装置及方法

Also Published As

Publication number Publication date
UA86795C2 (uk) 2009-05-25
RU2006135344A (ru) 2008-04-20
EP1723314A1 (fr) 2006-11-22
MXPA06010263A (es) 2007-01-19
BRPI0507437A (pt) 2007-07-24
IL177976A0 (en) 2006-12-31
CA2461086C (fr) 2010-12-21
WO2005085603A1 (fr) 2005-09-15
RU106307U8 (ru) 2012-02-20
CA2461086A1 (fr) 2005-09-09
NO20064377L (no) 2006-11-07
RU106307U1 (ru) 2011-07-10
EP1723314A4 (fr) 2008-06-18

Similar Documents

Publication Publication Date Title
RU2537118C2 (ru) Система для эффективного снижения давления текучей среды
RU2719413C2 (ru) Системы с замкнутым регенеративным термодинамическим циклом выработки электроэнергии и способы их работы
JP6245404B1 (ja) 燃焼装置および発電設備
CN107388230B (zh) 一种联合回热系统
WO2017093396A1 (fr) Système et procédé de commande pour stations de baisse de pression
JP2018536794A (ja) 高温ヒートポンプによるプロセス蒸気の発生
CN101865033A (zh) 用于使压缩机放出排气膨胀的方法
US7950214B2 (en) Method of and apparatus for pressurizing gas flowing in a pipeline
US20070177969A1 (en) Method of power generation from pressure control stations of a natural gas distribution system
KR102061275B1 (ko) 하이브리드형 발전 시스템
US9404395B2 (en) Selective pressure kettle boiler for rotor air cooling applications
CN105888845A (zh) 一种天然气差压冷能利用装置
RU2004833C1 (ru) Теплоэнергетическа установка
JP2009097389A (ja) エネルギー回収機能を備えた減圧設備
JP2001241304A (ja) ガス圧力エネルギを利用した複合発電システム
JPH11270347A (ja) Ｌｎｇを用いるガスタービンコンバインド発電装置
JP2009180101A (ja) エネルギー回収機能を備えた減圧設備
KR20170134127A (ko) 복수의 팽창기를 구비한 열병합 발전시스템
CN106703919B (zh) 一种燃气锅炉房余压余热综合利用系统
KR20180017752A (ko) 복수의 팽창기를 구비한 열병합 발전시스템
CN120990717A (zh) 过热蒸汽能源梯度利用的方法

Legal Events

Date Code Title Description
AS Assignment

Owner name: TRI GAS & OIL TRADE SA, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LOURENCO, JOSE;REEL/FRAME:018241/0873

Effective date: 20060908

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION