RU2576556C2 - Compressor station of main gas line with gas turbine expander power plant - Google Patents

Compressor station of main gas line with gas turbine expander power plant Download PDF

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Publication number
RU2576556C2
RU2576556C2 RU2014129237/06A RU2014129237A RU2576556C2 RU 2576556 C2 RU2576556 C2 RU 2576556C2 RU 2014129237/06 A RU2014129237/06 A RU 2014129237/06A RU 2014129237 A RU2014129237 A RU 2014129237A RU 2576556 C2 RU2576556 C2 RU 2576556C2
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gas
gas turbine
pressure
power plant
turbine expander
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RU2014129237/06A
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Russian (ru)
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RU2014129237A (en
Inventor
Владимир Анатольевич Субботин
Сергей Иванович Корнеев
Игорь Николаевич Шурухин
Константин Юрьевич Шабанов
Леонид Павлович Шелудько
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Общество с ограниченной ответственностью "Газпром трансгаз Самара"
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Priority to RU2014129237/06A priority Critical patent/RU2576556C2/en
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Abstract

FIELD: power industry.
SUBSTANCE: compressor station of the main gas line with the gas turbine expander power plant has gas turbine gas transfer units with natural gas blowers and air coolers. The gas turbine expander power plant contains a HP fuel gas line, a separator, a heat exchanger-regenerator, turbine expander with regulated nozzles block, and device for its control, a gas turbine plant. The HP fuel gas line is connected via the separator and the heat exchanger-regenerator with input of the turbine expander, and ensures fuel supply of the gas turbine expander power plant and all gas transfer units of the compressor station. The gas turbine expander power plant is made regenerative and additionally has the ejector turborefrigeration machine with LT working medium. The turbo expander output is connected via the MP fuel gas line, fuel gas line of the gas turbine expander power plant with the combustion chamber of this plant, and via the fuel gas lines with the combustion chambers of the gas turbine gas transfer units. The exhaust gas duct of the gas turbine of the gas turbine expander power plant is connected with atmosphere via the additional regenerative air heater and the heat exchanger-regenerator.
EFFECT: increased power and economical efficiency of the gas turbine expander plant and gas transfer units of the compressor station.
2 dwg

Description

The invention relates to compressor stations of main gas pipelines and can be used to increase the power and efficiency of a gas turbine expander power plant and gas compressor units KS.
Known gas pumping unit (GPU) of the compressor station of the main pipelines, equipped with an ejector turbo-refrigerating machine (ETXM) with a low-temperature working fluid (NRT), which ensures utilization of the heat of the exhaust gases of the gas turbine and air cooling in front of the GPU compressor. ETHM contains an ejector with an expansion nozzle, a mixing chamber and a diffuser, an HPT condenser, a pump, a butterfly valve, an HPT high-pressure steam generator, an evaporator-air cooler, high and low pressure steam pipelines, and an HPT condensate line. ETHM has steam and refrigeration circuits. Due to the utilization of the heat of the exhaust gas of the gas compressor unit, the high-pressure steam NRT is generated in the NRT steam generator and fed to the ejector.
Then it is expanded in the nozzle of the ejector, creating a vacuum in the mixing chamber, low pressure steam is sucked into it and mixed with expanded steam in the nozzle. The mixture of these flows is compressed in a diffuser, the pressure is increased, and the mixture of steam flows in the HPT condenser is condensed. The condensate vapor is divided into two streams. The first of them is compressed in a pump, fed to the HPT high-pressure steam generator and then sent to an ejector. The second stream is throttled in a throttle valve and fed to the evaporator-air cooler, where it is evaporated with the formation of low-pressure steam НРТ and air is cooled by it in front of the GPU compressor. Then this steam is sucked from the evaporator-air cooler and fed into the mixing chamber of the ejector (RN Radchenko, NN Radchenko. Energy-saving in-cycle trigeneration in gas turbine installations of compressor stations. "Aerospace Engineering and Technology", 2011, No. 10 ( 87), p. 99, fig. 2). This technical solution allows for the cooling of cyclic air and increase the thermal efficiency of the gas compressor unit. But its drawbacks are the possibility of using ETHM only in the summer period at elevated outdoor temperatures, as well as the need to use a special NRT air condenser at the compressor station.
The closest in technical essence to the invention is an energy gas turbine expander (EGTD), used to generate electricity at gas distribution stations of the GDS, containing a gas turbine expander with an adjustable nozzle apparatus (RSA), an aircraft gas turbine engine with an air compressor, a combustion chamber, high and low gas turbines pressure. A high-pressure circuit shaft connects the air compressor to a high-pressure gas turbine of an aircraft gas turbine engine; a low-pressure circuit shaft connects a low-pressure gas turbine to a gas turbine expander and through a gearbox with an electric generator rotor. The high pressure gas pipeline is connected by pipelines through a heat exchanger-regenerator and a gas turboexpander with the combustion chamber of the aircraft engine and with the gas outlet line. The heat exchanger-regenerator is installed in the exhaust duct of a low pressure gas turbine. The joint useful work of a low-pressure gas turbine and a gas turbine expander is used to generate electricity in an electric generator, and the natural gas entering a gas turbine expander is heated by the heat of exhaust gases from an aircraft engine. When changing the gas pressure in the high pressure gas pipeline, by means of the SAR, a constant gas pressure is maintained in the gas outlet line and in the combustion chamber of the aircraft engine (RF Patent No. 2091592, F01K 27/00, F02C 6/00). This technical solution is taken as a prototype of the invention.
At the same time, the prototype is characterized by a number of disadvantages:
- the prototype is used to generate electricity at gas distribution stations and hydraulic fracturing with the passage of large volumes of natural gas through a turboexpander with a pressure of 4-5.5 MPa and supplying low pressure gas to consumers of 0.6-1.2 MPa, so it cannot be used on compressor stations, since the pressure of the fuel gas in the GPU combustion chambers is 2-3 MPa;
- the gas turbine of the aircraft engine and the expander are connected by a common shaft to the rotor of the electric generator through a reduction gear, which reduces the reliability of the power gas turbine expander;
- since only fuel gas is expanded in a turboexpander for a compressor station of a gas turbine expander, this installation will have a small capacity.
The technical task of the invention is to increase the power and efficiency of a gas turbine expander power plant and gas pumping units KS.
The problem is solved due to the fact that the compressor station of the main gas pipeline with a gas turbine expander power plant, equipped with gas turbine gas pumping units with natural gas blowers and air cooling apparatuses (ABO) of compressed natural gas, while the gas turbine expander power plant contains a high pressure fuel gas pipeline, a separator, heat exchanger-regenerator, turboexpander with an adjustable nozzle apparatus and a device for its control, g a nitrogen turbine unit with a compressor, a combustion chamber, a gas turbine, an electric generator, while a high pressure fuel gas pipeline is connected through a separator and a heat exchanger-regenerator to the turbine expander inlet, and a high pressure fuel gas pipeline provides fuel to the gas turbine expander power plant and all gas pumping units of the compressor station, this gas turbine expander power plant is made regenerative and is additionally equipped with an ejector turbo-refrigerating machine with a low-temperature working fluid (НРТ), which has an additional fuel gas heater, a medium-pressure heated gas gas pipeline, an НРТ steam condenser serving as a medium-pressure fuel gas heater, a medium-pressure heated gas gas pipeline, an НРТ pump, a butterfly valve, a low-pressure steam pipeline NRT pressure, air cooler, NRT condensate line, high pressure gas pipeline, ejector, low pressure steam pipe, additional compressed gas cooler natural gas, gas heat recovery unit GPA, which serves as a high-pressure steam generator НРТ and a heat carrier heater; at the same time, the output of the turboexpander is connected through the medium pressure fuel gas pipeline, the fuel gas pipeline of the gas turbine expander with the combustion chamber of this installation, and also through the gas pipelines of the fuel gas with the GPU combustion chambers; the exhaust gas duct of a gas turbine of a gas turbine expander power plant is connected to the atmosphere through an additional regenerative air heater and a heat exchanger-regenerator, the rotor of a turboexpander is connected by a common shaft to the rotor of a compressor, the rotor of a gas turbine is connected by a shaft to the rotor of an electric generator, the regenerative air heater is located in the exhaust gas turbine of the gas turbine a regenerator; the HPT steam condenser, which serves as a medium-pressure fuel gas heater, is installed in the medium-pressure fuel gas pipeline at the outlet of the turbine expander, the GPA exhaust heat heat exchanger, which serves as the HPT high-pressure steam generator, is located in the exhaust gas duct of the gas pumping unit, an additional fuel gas heater is connected by supply and heat-transfer pipes with a heat recovery unit of the GPA flue gas, which simultaneously serves as an HPT high-pressure steam generator; an additional gas cooler for compressed natural gas is installed after the ABO in the high pressure gas pipeline of the gas compressed in the GPA supercharger; the air cooler is placed in the duct in front of the compressor of the gas turbine expander power plant and is connected by low pressure steam pipelines НРТ with a butterfly valve and with the mixing chamber of the ejector; the control device is connected by impulse lines to an adjustable nozzle apparatus of a turboexpander and to a medium-pressure fuel gas pipeline; the output of the NRT steam condenser, which serves as a medium-pressure fuel gas heater, is connected through the NRT condensate line, the NRT pump, an additional compressed natural gas gas cooler, the NRT high pressure steam generator and the NRT high pressure steam line with an ejector nozzle, and its output diffuser is connected to the inlet of the NRT steam condenser , which serves as a medium pressure fuel gas heater, in addition, the HPT condensate line is connected to the ejector mixing chamber through a throttle valve, the HPT low pressure steam line and air Cooler.
In FIG. 1 shows a block diagram of the proposed compressor station of the main gas pipeline with a gas turbine expander. It consists of blocks including a gas turbine expander power plant I, an ejector turbo-refrigerating machine (ETHM) II, a compressor station of the gas main III.
In FIG. 2 shows the thermal diagram of the compressor station of the main gas pipeline III.
Gas turbine expander power plant of the main gas pipeline compressor station - block I, includes: high pressure fuel gas pipeline 1, separator 2, heat exchanger-regenerator 3, turboexpander with adjustable nozzle apparatus (PCA) 4, compressor 5, gas turbine 6, electric generator 7, control device PCA 8, medium pressure fuel gas pipeline 9, regenerative air heater 10, combustion chamber of a gas turbine expander power plant 11, exhaust gas duct of a gas turbine 12, gas pipeline oplivnogo gazoturbodetandernoy gas power plant 19.
Ejector turbo-refrigerating machine (ETHM) - block II, includes: НРТ 16 steam condenser serving as a medium pressure fuel gas heater, medium pressure heated gas gas pipeline 18, НРТ 13 pump, throttle valve 14, НРТ 15 low pressure steam line, air cooler 17, additional fuel gas heater 20, condensate pipe НРТ 22, high pressure gas pipe 23, ejector 24, exhaust gas heat recovery unit GPA, which serves as a high-pressure steam generator НРТ and heat carrier heater 25, coolant piping 26, coolant discharge duct 27, compressed natural gas gas cooler 28.
The compressor station of the main gas pipeline - block III, contains: ABO 29, superchargers 30 GPA, gas pipelines of gas fuel GPA 21, gas turbine units GPA 31, combustion chambers GPA 32, main gas pipeline 33.
The main gas pipeline 33 through the superchargers 30 of gas turbine gas pumping units, ABO 29 and the gas cooler of compressed natural gas 28 is connected to the high pressure gas pipeline 23. In addition, the main gas pipeline 33 is connected via the high pressure fuel gas pipeline 1, separator 2 and the heat exchanger-regenerator 3 to the turbine expander 4 equipped with an adjustable nozzle apparatus. The output of the turboexpander 4 through the medium pressure fuel gas pipeline 9, the НРТ 16 steam condenser serving as the medium pressure fuel gas heater, the medium pressure heated gas gas pipeline 18 and the fuel gas pipeline of the gas turbine expander power plant 19 are connected to the combustion chamber 11 of the gas turbine expander power plant, and also through GPA fuel gas pipelines 21 with GPA combustion chambers 32 GPA gas turbine units 31. An additional fuel gas heater 20 is connected conductive coolant conduit 26 and coolant discharge line 27 to heat exchanger 25 serving as high-pressure steam generator and HPT preheater coolant.
The rotor of the turboexpander 4 is connected by a common shaft with the rotor of the compressor 5, the rotor of the gas turbine 6 is connected by a shaft with the rotor of the electric generator 7. A regenerative air heater 10 and a heat exchanger-regenerator 3 are installed in the exhaust duct 12 of the gas turbine 6.
The operation of the gas turbine expander power plant own needs of the compressor station is as follows. Natural gas of high pressure 5-7 MPa from the main gas pipeline 33 is fed through a high pressure fuel gas pipeline 1 to the inlet of the turbine expander 4, having previously been cleaned of impurities in the separator 2 and heated in the heat exchanger-regenerator 3 due to the heat of the gases expanded in the gas turbine 6 of the gas turbine expander power plant and partially cooled in a regenerative air heater 10, supplied to it through the exhaust gas duct of the gas turbine 12. In the turbine expander 4, the fuel gas expands to a pressure of 2-3 M Pa, doing useful work used to drive the compressor 5 of the gas turbine expander power plant. The fuel gas expanded in the turboexpander 4 through the medium pressure fuel gas pipeline 9, the HPT steam condenser 16, which serves as the medium pressure fuel gas heater, and the medium pressure fuel gas pipeline 18, is heated in the additional fuel gas heater 20 by the heat of the coolant heated in the heat recovery boiler serving HPT high-pressure steam generator and coolant heater 25, supplied to the fuel gas heater 20 through the coolant supply pipe 26 and the outlet from it through the coolant discharge pipe 27. In the steam condenser НРТ 16, which serves as a medium pressure fuel gas heater, due to the cold fuel gas expanded in the turboexpander 4, the НРТ steam supplied to it from the ejector 24 is condensed. The НРТ condensate is compressed by the pump 13 and through the condensate pipe НРТ 22 it is supplied to the gas cooler of compressed natural gas 28, where it additionally cools the high-pressure gas compressed in the supercharger 30, previously cooled in ABO 29. After partial heating in gas cooler In the body 28, НРТ condensate is supplied to the input of a heat utilizer, which serves as a high-pressure steam generator НРТ and a heat carrier heater 25, where it is heated to a temperature of about 170 ° C due to the heat of the exhaust gases of the gas turbine 31 GPA. The HPT high-pressure steam heated to this temperature is fed into the nozzle of the ejector 24, expands in it, and then, after compression in its diffuser, is fed to the input of the HPT steam condenser, which serves as a medium-pressure fuel gas heater 16, where this HPT vapor is condensed with fuel of gas supplied through the medium pressure fuel gas pipeline 9. When the pressure in the main gas pipeline 33 is changed using the control device 8, an impact on the adjustable nozzle apparatus of the turboexpander 4 s maintaining the required pressure in the pipelines of the heated fuel gas of medium pressure 18, 19 and 21, in the combustion chamber of the gas turbine expander power plant 11 and in the combustion chambers 32 of the gas turbine gas pumping units.
The use of an ejector turbo-refrigerating machine II allows the use of a low temperature of fuel gas expanded in a turboexpander for additional cooling of high-pressure natural gas compressed in a GPU supercharger and for cooling atmospheric air in front of a compressor of a gas-turbine expander power plant, which will increase its thermal efficiency.
Using the heat of the exhaust gases of the gas turbine of the gas turbine to generate high pressure steam НРТ and for heating fuel gas of medium pressure allows to increase the efficiency of gas turbine expander power plant and gas compressor units KS.
The connection of a high-speed turbo-expander 6 with a compressor by a common shaft allows using the mechanical energy of the turbo-expander 6 to drive the compressor, increasing the number of revolutions of the turbo-expander and compressor, increasing the power and efficiency of the gas-turbine-expanding unit, and also reducing the number of compressor stages and increasing its efficiency.
The electric generator drive from the gas turbine shaft of the gas turbine expander power plant allows you to refuse to use a reduction gear.
The use of a regenerative air heater, which heats up the compressed air in front of the combustion chamber of a gas turbine expander power plant, can reduce fuel consumption and increase the efficiency of this plant.

Claims (1)

  1. The compressor station of the main gas pipeline with a gas turbine expander power plant equipped with gas turbine gas pumping units with natural gas blowers and air coolers, while the gas turbine expander power plant contains a high pressure fuel gas pipeline, a separator, a heat exchanger-regenerator, a turboexpander with an adjustable nozzle device and its device gas turbine installation with compressor, combustion chamber, gas turbine, a gas generator, while the high pressure fuel gas pipeline is connected through a separator and a heat exchanger-regenerator to the inlet of the turbo expander, characterized in that the high pressure fuel gas pipeline provides fuel to the gas turbine expander power plant and all gas pumping units of the compressor station, the gas turbine expander power plant is regenerative and additionally provided turbo-refrigerating machine with a low-temperature working fluid (НРТ), the second one contains an additional fuel gas heater, a medium pressure heated gas pipeline, an HPT steam condenser that serves as a medium pressure fuel gas heater, a medium pressure heated gas pipeline, an HPT pump, a butterfly valve, an HPT low pressure steam line, an air cooler, an HPT condensate line, a high pressure gas pipeline pressure, ejector, low pressure steam line, additional gas cooler for compressed natural gas, gas heat exchanger utilizing gas compressor unit, serving High pressure steam eratorom HPT and the coolant preheater; at the same time, the output of the turboexpander is connected through the medium pressure fuel gas pipeline, the fuel gas pipeline of the gas turbine expander with the combustion chamber of this installation, and also through the gas pipelines of the fuel gas with the GPU combustion chambers; the exhaust gas duct of a gas turbine of a gas turbine expander power plant is connected to the atmosphere through an additional regenerative air heater and a heat exchanger-regenerator, the rotor of a turboexpander is connected by a common shaft to the rotor of a compressor, the rotor of a gas turbine is connected by a shaft to the rotor of an electric generator, the regenerative air heater is located in the exhaust gas turbine of the gas turbine a regenerator; the HPT steam condenser, which serves as a medium-pressure fuel gas heater, is installed in the medium-pressure fuel gas pipeline at the outlet of the turbine expander, the GPA exhaust heat heat exchanger, which serves as the HPT high-pressure steam generator, is located in the exhaust gas duct of the gas pumping unit, an additional fuel gas heater is connected by supply and heat-transfer pipes with a heat recovery unit of the GPA flue gas, which serves as an HPT high-pressure steam generator; an additional gas cooler for compressed natural gas is installed after the air-cooling apparatus in the high-pressure gas pipeline of gas compressed in the GPU supercharger; the air cooler is placed in the duct in front of the compressor of the gas turbine expander power plant and is connected by low pressure steam pipelines НРТ with a butterfly valve and with the mixing chamber of the ejector; the control device is connected by impulse lines to an adjustable nozzle apparatus of a turboexpander and to a medium-pressure fuel gas pipeline; the output of the NRT steam condenser, which serves as a medium-pressure fuel gas heater, is connected through the NRT condensate line, the NRT pump, an additional compressed natural gas gas cooler, the NRT high pressure steam generator and the NRT high pressure steam line with an ejector nozzle, and its output diffuser is connected to the inlet of the NRT steam condenser , which serves as a medium pressure fuel gas heater, in addition, the HPT condensate line is connected to the ejector mixing chamber through a throttle valve, the HPT low pressure steam line and air Cooler.
RU2014129237/06A 2014-07-15 2014-07-15 Compressor station of main gas line with gas turbine expander power plant RU2576556C2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2656769C1 (en) * 2017-04-13 2018-06-06 федеральное государственное автономное образовательное учреждение высшего образования "Самарский национальный исследовательский университет имени академика С.П. Королёва" Thermal power plant gas turboexpander power unit operation method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1592666A (en) * 1976-12-10 1981-07-08 Sulzer Ag Method of operating an open circuit gas-turbine plant cooperating with a vapour power circuit
RU2013615C1 (en) * 1992-01-16 1994-05-30 Валерий Игнатьевич Гуров Gas-turbine expander unit operating on natural gas
RU2091592C1 (en) * 1994-08-23 1997-09-27 Валерий Игнатьевич Гуров Method of operation of gas turbo-expander plant
RU2096640C1 (en) * 1994-11-30 1997-11-20 Научно-производственное товарищество с ограниченной ответственностью "Аэротурбогаз" Gas-turbine expansion machine operation process
RU2196233C1 (en) * 2001-06-21 2003-01-10 Открытое акционерное общество "А.Люлька-Сатурн" Cooled turbine of gas turbine engine
RU133250U1 (en) * 2013-05-07 2013-10-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Казанский государственный энергетический университет" (ФГБОУ ВПО "КГЭУ") Gas distribution station

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1592666A (en) * 1976-12-10 1981-07-08 Sulzer Ag Method of operating an open circuit gas-turbine plant cooperating with a vapour power circuit
RU2013615C1 (en) * 1992-01-16 1994-05-30 Валерий Игнатьевич Гуров Gas-turbine expander unit operating on natural gas
RU2091592C1 (en) * 1994-08-23 1997-09-27 Валерий Игнатьевич Гуров Method of operation of gas turbo-expander plant
RU2096640C1 (en) * 1994-11-30 1997-11-20 Научно-производственное товарищество с ограниченной ответственностью "Аэротурбогаз" Gas-turbine expansion machine operation process
RU2196233C1 (en) * 2001-06-21 2003-01-10 Открытое акционерное общество "А.Люлька-Сатурн" Cooled turbine of gas turbine engine
RU133250U1 (en) * 2013-05-07 2013-10-10 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Казанский государственный энергетический университет" (ФГБОУ ВПО "КГЭУ") Gas distribution station

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2656769C1 (en) * 2017-04-13 2018-06-06 федеральное государственное автономное образовательное учреждение высшего образования "Самарский национальный исследовательский университет имени академика С.П. Королёва" Thermal power plant gas turboexpander power unit operation method

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