Method for operation of gas-turbine power plant with spent gas recycling and corresponding gas-turbine power plant

FIELD: power industry.

SUBSTANCE: method for operation of a gas turbine plant (6) comprising a compressor (1) with an inlet cross-section, a combustion chamber (4, 14, 15) and a turbine (7, 16, 17). Gas with reduced oxygen content that has oxygen concentration below the average oxygen concentration in the stream at the compressor inlet and fresh air (2) are fed to the compressor in a radially separated manner. Fresh air is supplied through the outer part (3') of the inlet cross-section relative to the rotational axis of the compressor (1), and gas with reduced oxygen content is supplied through the inner part (3") of the inlet cross-section relative to the rotational axis of the compressor (1). A portion of cooling air in the gas turbine plant is withdrawn from the outer wall of the compressor casing via sampling points of the compressor. Fresh air is withdrawn in the compressor and sent past the combustion chamber in the form of cooling gas while maintaining a low oxygen flow in the compressor, and fed into the combustion chamber from the compressor outlet. The reliable operation of a gas turbine plant with two inlet flows with different gas compositions is achieved, in which the effect of the intake stream with reduced oxygen content on combustion is maximized.

EFFECT: possibility of gas mass flow application, with gas having a reduced proportion of oxygen, which provides a certain effect during combustion.

15 cl, 5 dwg

 



 

Same patents:

Gas turbine engine // 2557793

FIELD: engines and pumps.

SUBSTANCE: this engine comprises housing, cover sealing the engine inlet, electrolyte feed system composed of the nozzle with cavitator, compressor and turbine shaft arranged in said housing, electrolyser-cavitator and local channel contraction with central body. Said electrolyser-cavitator is sealed in separate case connected with combustion chamber to feed pressurized gas mix downstream of compressor via electrolyser-cavitator with central; body to combustion chamber with igniter. Combustion chamber outlet is provided with gas flow separator including supersonic nozzle, outer and inner coaxial tubes and channel to return subsonic flow back, into combustion chamber.

EFFECT: higher efficiency.

2 dwg

FIELD: power industry.

SUBSTANCE: invention refers to power industry. Method of main spent gas recirculation pipeline blowing in a gas turbine utilizes flow discharged from compressor, so that first part of discharged air is directed to main pipeline of spent gas recirculation for blowing, while second part of compressed air is fed via second main discharge pipeline to steam generator operated with by-product fuel. Additionally, invention describes gas turbine with main blowing pipeline as per invention.

EFFECT: reliable blowing of main pipelines of spent gas recirculation without the use of additional feed fans.

15 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed process consists in feed of hot gas tapped from the channel arranged downstream of turbine into channel arranged between inlet device and engine compressor in amount sufficient for maintenance of gas preset temperature at compressor inlet. Gas temperature at compressor inlet is kept constant and equal to air deceleration temperature at aircraft cruising speed. Air flow rate through engine and pressure difference at nozzle (at permanent gas temperature at compressor inlet) vary with variation of engine inlet air pressure.

EFFECT: higher fuel efficiency at high flight speeds.

3 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: flow of exhaust gases discharges from gas turbine engine. Exhaust gas flow is compressed in first compressor of CO2 separation unit. CO2 is separated from exhaust gas flow by forcing exhaust gases through diaphragm to isolate carbon dioxide and exhaust gas flow. Carbon dioxide-depleted exhaust gas is expanded in expander in CO2 separation unit to produce cooled carbon dioxide-depleted exhaust gas flow. Water entering the gas turbine engine second compressor is cooled by feeding cooled carbon dioxide-depleted exhaust gas flow through heat exchanger together with said air entering second compressor.

EFFECT: simplified method, higher efficiency.

10 cl, 3 dwg

FIELD: machine building.

SUBSTANCE: steam generating plant includes pressure unit, burner device and steam generator. Pressure unit consists of gas turbine and air compensator connected to it via power train, for example, shaft. Compensator input is connected to atmosphere. Steam generator has channels of hot and cold heat-transfer mediums with inlets and outlets correspondingly. Burner device is equipped with inlet for air, fuel supply and hot gas outlet. The outlet of pressure unit compensator is connected to burner device inlet for air supply. The inlet of pressure unit gas turbine is connected to the outlet of burner device through hot heat-transfer medium channel of steam generator and turbine outlet - to the atmosphere. The inlet of cold heat-transfer medium channel of steam generator is connected to the source of heated medium, and the channel outlet - to the receiving device of heated medium. The plant additionally contains air booster compressor, ballast gas compressor, second gas turbine, everything with inlets and outlets correspondingly and useful load, for example, electric generator. Air booster compressor, ballast gas compressor, second gas turbine and electric generator are mounted on one shaft. The outlet of pressure unit air compressor is connected to the inlet of burner device through air booster compressor. The inlet of hot heat-transfer medium channel of steam generator is connected to the hot gas outlet of burner device through the second gas turbine. The outlet of hot heat-transfer medium channel of steam generator is additionally connected to the inlet of burner device through ballast gas compensator.

EFFECT: invention allows increasing coefficient of performance and operational life of the plant, reducing its size, material consumption and cost, reducing the number of nitrogen oxides generated during operation.

1 dwg

FIELD: power industry.

SUBSTANCE: fuel and the received mixture of ambient air with cooled recirculating gaseous combustion products are compressed. Chamber combustion of fuel is performed under pressure in the environment of the received compression mixture of atmospheric air with cooled recirculating combustion products with formation of high-temperature gaseous combustion products. The formed high-temperature combustion products are subject to gas-turbine decompression so that decompression non-cooled gaseous combustion products can be obtained and separated into two flows. One flow is supplied to the boiler gas duct. The other - to gas line of recirculating gaseous combustion products for cooling and mixing with ambient air prior to compression. Ambient air is cooled prior to compression. Cooling of recirculating gaseous combustion products and ambient air is performed with cooling agent generated in turbine expander and circulating via closed circuit with cooling agent.

EFFECT: reducing auxiliary costs and increasing the efficiency; maintaining low concentration level of nitrogen oxides in flue gases taken from the boiler to atmosphere.

1 dwg

FIELD: power industry.

SUBSTANCE: operating method of power plant with gas-turbine unit involves air compression in compressor, supply and combustion of fuel in combustion chamber, supply of steam to the flow part of gas-turbine unit, formation of steam-gas mixture, its expansion in turbine to convert heat energy to mechanical energy, cooling of steam-gas mixture in heat exchange device, obtaining of condensate and its conversion to the steam supplied to flow part, and discharge of the remaining cooled steam-gas mixture to atmosphere. Steam obtained from condensate in heat exchange device is completely introduced to flow part of gas-turbine unit between combustion chamber and turbine, and pressure is increased before turbine. Introduced steam is obtained by heating the condensate obtained from steam-gas mixture at pressure which is by 15-30% higher than the pressure in combustion chamber to the temperature equal to steam saturation temperature by controlling the condensate flow directed to heat exchanger as cold heat carrier.

EFFECT: improving fuel energy use efficiency, reducing heat pollution of the environment.

6 cl, 1 dwg

FIELD: heat power engineering.

SUBSTANCE: proposed method of power generation at thermal power stations combustion organic fuel and furnished with gas-turbo-electric generators is carried out by delivering flows of oxygen, fuel and gas ballast into exother moreactive chamber under pressure. Hot combustion products obtained also under pressure are delivered into working space of turbine to transmit rotating force to drive of electric generator. Used as gas ballast are own combustion products, and additional generation of power is effected using nitrogen. To generate energy first liquefied and then compressed flows of oxygen and nitrogen are delivered, after heating before delivery into exothermoreactive chamber in its cooling system and by heat of combustion products and nitrogen brought out into atmosphere. Heated flow of nitrogen is directed to additional gas-turbo-electric generator. Returned combustion products are liquefied and then compressed in liquefied state, and are heated before delivering into exotheroreactive chamber.

EFFECT: reduced discharge of nitrogen oxides and power consumption at generation of electric energy.

3 dwg

The invention relates to gas turbine units (GTU), in particular, implements a semi-closed circuit workflow and utilization of exhaust heat

The invention relates to internal combustion engines, and particularly to gas turbine engines

FIELD: heat power engineering.

SUBSTANCE: proposed method of power generation at thermal power stations combustion organic fuel and furnished with gas-turbo-electric generators is carried out by delivering flows of oxygen, fuel and gas ballast into exother moreactive chamber under pressure. Hot combustion products obtained also under pressure are delivered into working space of turbine to transmit rotating force to drive of electric generator. Used as gas ballast are own combustion products, and additional generation of power is effected using nitrogen. To generate energy first liquefied and then compressed flows of oxygen and nitrogen are delivered, after heating before delivery into exothermoreactive chamber in its cooling system and by heat of combustion products and nitrogen brought out into atmosphere. Heated flow of nitrogen is directed to additional gas-turbo-electric generator. Returned combustion products are liquefied and then compressed in liquefied state, and are heated before delivering into exotheroreactive chamber.

EFFECT: reduced discharge of nitrogen oxides and power consumption at generation of electric energy.

3 dwg

FIELD: power industry.

SUBSTANCE: operating method of power plant with gas-turbine unit involves air compression in compressor, supply and combustion of fuel in combustion chamber, supply of steam to the flow part of gas-turbine unit, formation of steam-gas mixture, its expansion in turbine to convert heat energy to mechanical energy, cooling of steam-gas mixture in heat exchange device, obtaining of condensate and its conversion to the steam supplied to flow part, and discharge of the remaining cooled steam-gas mixture to atmosphere. Steam obtained from condensate in heat exchange device is completely introduced to flow part of gas-turbine unit between combustion chamber and turbine, and pressure is increased before turbine. Introduced steam is obtained by heating the condensate obtained from steam-gas mixture at pressure which is by 15-30% higher than the pressure in combustion chamber to the temperature equal to steam saturation temperature by controlling the condensate flow directed to heat exchanger as cold heat carrier.

EFFECT: improving fuel energy use efficiency, reducing heat pollution of the environment.

6 cl, 1 dwg

FIELD: power industry.

SUBSTANCE: fuel and the received mixture of ambient air with cooled recirculating gaseous combustion products are compressed. Chamber combustion of fuel is performed under pressure in the environment of the received compression mixture of atmospheric air with cooled recirculating combustion products with formation of high-temperature gaseous combustion products. The formed high-temperature combustion products are subject to gas-turbine decompression so that decompression non-cooled gaseous combustion products can be obtained and separated into two flows. One flow is supplied to the boiler gas duct. The other - to gas line of recirculating gaseous combustion products for cooling and mixing with ambient air prior to compression. Ambient air is cooled prior to compression. Cooling of recirculating gaseous combustion products and ambient air is performed with cooling agent generated in turbine expander and circulating via closed circuit with cooling agent.

EFFECT: reducing auxiliary costs and increasing the efficiency; maintaining low concentration level of nitrogen oxides in flue gases taken from the boiler to atmosphere.

1 dwg

FIELD: machine building.

SUBSTANCE: steam generating plant includes pressure unit, burner device and steam generator. Pressure unit consists of gas turbine and air compensator connected to it via power train, for example, shaft. Compensator input is connected to atmosphere. Steam generator has channels of hot and cold heat-transfer mediums with inlets and outlets correspondingly. Burner device is equipped with inlet for air, fuel supply and hot gas outlet. The outlet of pressure unit compensator is connected to burner device inlet for air supply. The inlet of pressure unit gas turbine is connected to the outlet of burner device through hot heat-transfer medium channel of steam generator and turbine outlet - to the atmosphere. The inlet of cold heat-transfer medium channel of steam generator is connected to the source of heated medium, and the channel outlet - to the receiving device of heated medium. The plant additionally contains air booster compressor, ballast gas compressor, second gas turbine, everything with inlets and outlets correspondingly and useful load, for example, electric generator. Air booster compressor, ballast gas compressor, second gas turbine and electric generator are mounted on one shaft. The outlet of pressure unit air compressor is connected to the inlet of burner device through air booster compressor. The inlet of hot heat-transfer medium channel of steam generator is connected to the hot gas outlet of burner device through the second gas turbine. The outlet of hot heat-transfer medium channel of steam generator is additionally connected to the inlet of burner device through ballast gas compensator.

EFFECT: invention allows increasing coefficient of performance and operational life of the plant, reducing its size, material consumption and cost, reducing the number of nitrogen oxides generated during operation.

1 dwg

FIELD: engines and pumps.

SUBSTANCE: flow of exhaust gases discharges from gas turbine engine. Exhaust gas flow is compressed in first compressor of CO2 separation unit. CO2 is separated from exhaust gas flow by forcing exhaust gases through diaphragm to isolate carbon dioxide and exhaust gas flow. Carbon dioxide-depleted exhaust gas is expanded in expander in CO2 separation unit to produce cooled carbon dioxide-depleted exhaust gas flow. Water entering the gas turbine engine second compressor is cooled by feeding cooled carbon dioxide-depleted exhaust gas flow through heat exchanger together with said air entering second compressor.

EFFECT: simplified method, higher efficiency.

10 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed process consists in feed of hot gas tapped from the channel arranged downstream of turbine into channel arranged between inlet device and engine compressor in amount sufficient for maintenance of gas preset temperature at compressor inlet. Gas temperature at compressor inlet is kept constant and equal to air deceleration temperature at aircraft cruising speed. Air flow rate through engine and pressure difference at nozzle (at permanent gas temperature at compressor inlet) vary with variation of engine inlet air pressure.

EFFECT: higher fuel efficiency at high flight speeds.

3 cl, 4 dwg

FIELD: power industry.

SUBSTANCE: invention refers to power industry. Method of main spent gas recirculation pipeline blowing in a gas turbine utilizes flow discharged from compressor, so that first part of discharged air is directed to main pipeline of spent gas recirculation for blowing, while second part of compressed air is fed via second main discharge pipeline to steam generator operated with by-product fuel. Additionally, invention describes gas turbine with main blowing pipeline as per invention.

EFFECT: reliable blowing of main pipelines of spent gas recirculation without the use of additional feed fans.

15 cl, 2 dwg

Gas turbine engine // 2557793

FIELD: engines and pumps.

SUBSTANCE: this engine comprises housing, cover sealing the engine inlet, electrolyte feed system composed of the nozzle with cavitator, compressor and turbine shaft arranged in said housing, electrolyser-cavitator and local channel contraction with central body. Said electrolyser-cavitator is sealed in separate case connected with combustion chamber to feed pressurized gas mix downstream of compressor via electrolyser-cavitator with central; body to combustion chamber with igniter. Combustion chamber outlet is provided with gas flow separator including supersonic nozzle, outer and inner coaxial tubes and channel to return subsonic flow back, into combustion chamber.

EFFECT: higher efficiency.

2 dwg

FIELD: machine building.

SUBSTANCE: invention relates to recirculation of flue gas in gas turbine units, namely to elements for the flue gas mixing with ambient air upstream the compressor. Suction section (2) upstream the compressor (1) input of gas turbine unit (1-7) with the flue gas recirculation contains section (22) with inflow (31) created by side wall (28-30), in it the fresh sucked air flows along the main direction (33) of air flow. Section contains at least two mixing tubes (32) continuing in the inflow (31) from at least one side wall (28-30). Each mixing tube (32) contains inlet (34) on the said at least one side wall (28-30) to receive recirculated flue gas (41), and contains outlet hole (37) located at distance from the said side wall (28-30), to blow down the circulated flue gases (41) from the mixing tube (32) in the air flow. At least two mixing tubes (32) are located in row, at that said row is aligned substantially along direction (33) of air flow, and most top along flow mixing tube (32) creates the front edge of this row.

EFFECT: uniform mixing and increased fail-safety of the device.

24 cl, 7 dwg

FIELD: power engineering.

SUBSTANCE: invention relates to control of exit gas recirculation gas-turbine power plant (38) and to gas-turbine power plant to implement method. Said gas-turbine power plant (38) comprises gas turbine (6), controller (39), steam generator (9) with heat recovery and divider (29) of exhaust gases, which divides exhaust gases (8, 19) of gas turbine power plant to first partial flow (21) of exhaust gases recirculation in sucked flow gas turbine (6) and at second partial flow (20, 24) of exhaust gases for emission to atmosphere, and element (11, 29) to control first flow (21) of exhaust gases and secondary cooler (27) of exhaust gases. Preset concentration of one component (CC) is determined from the specified value of concentration of one component (Ccl) of gas from control circuit for working variable, related to combustion in gas turbine (6), values of anticipatory control of given concentration of gas component (Cmap) and correction of preset concentration (Ccor) component gas obtained by means of feedback circuit. Controller (39) of said gas-turbine power plant (38) comprises three level controller for determination of preset concentration (CC) one component, where first level controller comprises closed control loop for preset concentration (CC) one component, second level controller comprises proactive control for given concentration (CC) one component, and third level controller includes feedback circuit, by means of which preset anticipatory control is corrected in compliance actual working behaviour of gas turbine power plant.

EFFECT: ensured is reliable protection of said gas-turbine power plant due to control content of at least one component of working medium.

16 cl, 4 dwg

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