CN102337936A - Flue gas reheating combined cycle power system - Google Patents
Flue gas reheating combined cycle power system Download PDFInfo
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- CN102337936A CN102337936A CN2011102699178A CN201110269917A CN102337936A CN 102337936 A CN102337936 A CN 102337936A CN 2011102699178 A CN2011102699178 A CN 2011102699178A CN 201110269917 A CN201110269917 A CN 201110269917A CN 102337936 A CN102337936 A CN 102337936A
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- turbine
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- flue gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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Abstract
The invention discloses a flue gas reheating combined cycle power system, and belongs to the technical field of fossil fuel power cycle power generation. The power system provided by the invention has the inherent high-efficiency characteristic of combined cycle and the high-efficiency characteristic of a gas turbine and steam turbine reheating technology. The gas turbine of an original combined cycle power system is divided into a high-pressure gas turbine and a medium-pressure gas turbine; gas at the outlet of the high-pressure gas turbine is reheated before entering the medium-pressure gas turbine, so that the endothermic average temperature of the overall gas turbine cycle rises, and the performance of the gas turbine cycle is improved. The flue gas reheating combined cycle power system provided by the invention has the advantages of high efficiency, low cost and low emission; and compared with the conventional combined cycle power plant, the flue gas reheating combined cycle power system is characterized in that: the net thermal efficiency is improved by 4 to 5 percent.
Description
Technical field
The invention belongs to fossil fuel power cycle technical field of power generation, be specifically related to a kind of flue gas reheat combined cycle power system.
Background technique
In the epoch that energy prices go up continuously, fossil fuel energy will be in consequence in the power industry midium or long term.Therefore, the power industry fossil fuel power cycle of always making great efforts development of new reaches purpose efficiently.The combined cycle power system is one of important selection that improves power station's efficient.
As everyone knows, between two gas turbines, heat is again carried out in combustion gas, the heat absorption mean temperature of whole gas turbine cycle can raise.Thereby the performance of gas turbine cycle will improve.Be difficult in the practice be implemented in and use heat exchanger that flue gas is carried out heat again between two gas turbines, because flue-gas temperature is too high.The present invention propose non-hot surface again thermal concept to address this problem.Combustion gas in the high pressure combustion turbine is only carried out partial combustion through the flow of control oxygen (or air).Through the flue gas pressurization of exhaust heat boiler (HRSG) outlet being sneaked into the FT of high pressure combustion turbine control high pressure combustion turbine.Flue gas (the comprising unburned combustion gas) temperature and pressure of high pressure combustion turbine outlet reduces.Power system when design, the flue gas pressures of high pressure combustion turbine gateway is optimized.In the firing chamber of middle compression ignite gas-turbine, need the additional oxygen (or air) of supply with the perfect combustion combustion gas.Through burning, in the outlet of firing chamber, flue-gas temperature reaches design load.
Because the significant variations of system layout, the flue gas operating mode of flue gas reheat combined cycle power system is different fully with traditional combined cycle gas turbine flue gas operating mode.One of variation is the gaseous-pressure of high pressure combustion turbine inlet, and the efficient of the high more power system of gaseous-pressure is high more.The gaseous-pressure of high pressure combustion turbine inlet is expected to reach 350bar even higher.Yet this can not influence the main structure of current gas turbine design.Unique variation is that the cylinder (overcoat) of gas turbine will be thickeied to adapt to high gaseous-pressure.The steam turbine that is operated in same stress level at present can be used as high pressure combustion turbine.The cylinder structure of current high-pressure steam turbine can be used for the handle high voltages combustion gas.In any case the thermal insulation of current gas turbine overcoat and cooling construction should still be used to handle the high temperature of combustion gas.
Summary of the invention
The object of the present invention is to provide a kind of flue gas reheat combined cycle power system.
Be applied to the flue gas reheat combined cycle power system (accompanying drawing 1) of scrubbed gas or liquid fuel; Flue gas compressor 1 and first air compressor 2 and a high pressure combustion turbine 3 and 9 coaxial linking to each other of first motor; From the recirculated compressed flue gas of flue gas compressor 1 with together get into high pressure combustion turbine 3 from the pressurized air of first air compressor 2 and high-pressure fuel gas and carry out partial combustion and demi-inflation; High pressure combustion turbine 3 and middle compression ignite gas-turbine 4 link to each other through fume pipe; From the high-pressure gas exhaust of high pressure combustion turbine 3 contain not clean-burning combustion gas together get into pressurized air from second air compressor 5 in compression ignite gas-turbine 4 carry out perfect combustion; Middle compression ignite gas-turbine 4 and second air compressor 5 and 10 coaxial connections of second generator; In compression ignite gas-turbine 4 and exhaust heat boiler 8 link to each other through flue, a part of fume pipe entering flue gas compressor 1 of passing through of the flue gas of exhaust heat boiler 8 outlets, another part enters atmosphere through chimney; Steam turbine 6 and 11 coaxial linking to each other of the 3rd generator; Steam turbine 6 and vapour condenser 7 link to each other through steam channel, and steam turbine 6 also links to each other through steam line with exhaust heat boiler 8, and water pump 12 passes through waterpipe successively and links to each other with exhaust heat boiler 8 with vapour condenser 7.
The fuel that said flue gas reheat combined cycle power system is used is scrubbed gas or liquid fuel.
Beneficial effect of the present invention: flue gas reheat combined cycle power system of the present invention has the advantage of high energy efficiency, low cost, low emission, improves 4～5% than traditional combined-cycle power plant's net thermal efficiency.
Description of drawings
Accompanying drawing 1 is a flue gas reheat combined cycle power system schematic representation;
In the accompanying drawing; 1-flue gas compressor, 2-first air compressor, 3-high pressure combustion turbine link to each other, compression ignite gas-turbine among the 4-, 5-second air compressor, 6-steam turbine,, 7-aggegation device, 8-exhaust heat boiler, 9-first generator, 10-second generator, 11-the 3rd generator, 12-water pump.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is further specified.
A kind of flue gas reheat combined cycle power system; Shown in accompanying drawing 1; Flue gas compressor 1 and first air compressor 2 and a high pressure combustion turbine 3 and 9 coaxial linking to each other of first motor; From the flue gas recycled of the compression of flue gas compressor 1 with together get into high pressure combustion turbine 3 from the pressurized air of first air compressor 2 and high-pressure fuel gas and carry out partial combustion and demi-inflation; High pressure combustion turbine 3 and middle compression ignite gas-turbine 4 link to each other through fume pipe; From the high-pressure gas exhaust of high pressure combustion turbine 3 contain not clean-burning combustion gas together get into pressurized air from second air compressor 5 in compression ignite gas-turbine 4 carry out perfect combustion, middle compression ignite gas-turbine 4 and second air compressor 5 and 10 coaxial connections of second generator, middle compression ignite gas-turbine 4 and exhaust heat boiler 8 link to each other through flue; The flue gas part of exhaust heat boiler 8 outlets gets into flue gas compressor 1 through fume pipe; Another part enters atmosphere through chimney, and steam turbine 6 and 11 coaxial linking to each other of the 3rd generator, steam turbine 6 and vapour condenser 7 link to each other through steam channel; Steam turbine 6 also links to each other through steam line with exhaust heat boiler 8, and water pump 12 passes through waterpipe successively and links to each other with exhaust heat boiler 8 with vapour condenser 7.
Combustion gas in the high pressure combustion turbine 3 is only carried out partial combustion through the flow of control oxygen (or air).Through the flue gas pressurization of exhaust heat boiler 8 outlets being sneaked into the FT of high pressure combustion turbine 3 control high pressure combustion turbines.Flue gas (the comprising unburned combustion gas) temperature and pressure of high pressure combustion turbine 3 outlets reduces compression ignite gas-turbine 4 in the entering of back.Power system when design, the flue gas pressures of high pressure combustion turbine 3 gateways is optimized.In the firing chamber of middle compression ignite gas-turbine 4, need the additional oxygen (or air) of supply with the combustion gas of perfect combustion residue.Through burning, the outlet in the firing chamber, flue-gas temperature should reach design load.
The efficient of the high more power system of gaseous-pressure of high pressure combustion turbine 3 inlets is high more.The gaseous-pressure of high pressure combustion turbine inlet is expected to reach 350bar even higher.Yet this can not influence the main structure of current gas turbine design.Unique variation is that the cylinder (overcoat) of gas turbine will be thickeied to adapt to high gaseous-pressure.The steam turbine that is operated in same stress level at present can be used as high pressure combustion turbine.The cylinder structure of current high-pressure steam turbine can be used for the handle high voltages combustion gas.In any case the thermal insulation of current gas turbine overcoat and cooling construction should still be used to handle the high temperature of combustion gas.The comparable traditional combined-cycle power plant of flue gas reheat combined cycle power system net thermal efficiency that present embodiment proposes is high by 4～5%.
Claims (2)
1. flue gas reheat combined cycle power system; It is characterized in that; Flue gas compressor (1) and first air compressor (2) and high pressure combustion turbine (3) and coaxial linking to each other of first generator (9); From the recirculated compressed flue gas of flue gas compressor (1) with together get into high pressure combustion turbine (3) from the pressurized air of first air compressor (2) and high-pressure fuel gas and carry out partial combustion and demi-inflation; High pressure combustion turbine (3) links to each other through fume pipe with middle compression ignite gas-turbine (4); From the high-pressure gas exhaust of high pressure combustion turbine (3) contain not clean-burning combustion gas together get into pressurized air from second air compressor (5) in compression ignite gas-turbine (4) carry out perfect combustion, middle compression ignite gas-turbine (4) links to each other through flue with exhaust heat boiler (8) with second air compressor (5) and coaxial connection of second generator (10), middle compression ignite gas-turbine (4); The flue gas part of exhaust heat boiler (8) outlet gets into flue gas compressor (1) through fume pipe; Another part enters atmosphere through chimney, steam turbine (6) and coaxial linking to each other of the 3rd generator (11), and steam turbine (6) links to each other through steam channel with vapour condenser (7); Steam turbine (6) also links to each other through steam line with exhaust heat boiler (8), and water pump (12) links to each other with exhaust heat boiler (8) with vapour condenser (7) through waterpipe successively.
2. according to the said a kind of flue gas reheat combined cycle power system of claim 1, it is characterized in that the fuel that said flue gas reheat combined cycle power system is used is scrubbed gas or liquid fuel.
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| CN2011102699178A CN102337936A (en) | 2011-09-13 | 2011-09-13 | Flue gas reheating combined cycle power system |
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| CN2011102699178A CN102337936A (en) | 2011-09-13 | 2011-09-13 | Flue gas reheating combined cycle power system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701244A (en) * | 2017-11-02 | 2018-02-16 | 国电龙源节能技术有限公司 | Steam turbine coaxially drags the system and its combination method of two asynchronous generating units |
| CN110425569A (en) * | 2019-08-27 | 2019-11-08 | 华能国际电力股份有限公司 | A kind of combined cycle thermoelectric system and method using fume afterheat deep exploitation and flue gas recirculation |
| CN110989342A (en) * | 2019-11-19 | 2020-04-10 | 华北电力大学 | Real-time T-S fuzzy modeling method for combined cycle unit heavy-duty gas turbine |
| WO2022161113A1 (en) * | 2021-01-27 | 2022-08-04 | 李华玉 | Dual-fuel combined cycle power device |
| CN114856735A (en) * | 2022-04-25 | 2022-08-05 | 中国能源建设集团江苏省电力设计院有限公司 | Air turbine coupling gas turbine power generation system based on compressed air energy storage |
| WO2022193796A1 (en) * | 2021-03-19 | 2022-09-22 | 李华玉 | Dual-fuel combined cycle power apparatus |
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| JPH1082306A (en) * | 1996-09-06 | 1998-03-31 | Ishikawajima Harima Heavy Ind Co Ltd | Gasification compound power generating installation |
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| CN101238341A (en) * | 2005-08-10 | 2008-08-06 | 阿尔斯托姆科技有限公司 | Method for operating a gas turbine and a gas turbine for implementing the method |
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2011
- 2011-09-13 CN CN2011102699178A patent/CN102337936A/en active Pending
Patent Citations (7)
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| JPH1082306A (en) * | 1996-09-06 | 1998-03-31 | Ishikawajima Harima Heavy Ind Co Ltd | Gasification compound power generating installation |
| CN1898499A (en) * | 2003-12-23 | 2007-01-17 | 阿尔斯通技术有限公司 | Thermal power plant with sequential combustion and reduced co2 emissions and method for operating a plant of this type |
| US20080010967A1 (en) * | 2004-08-11 | 2008-01-17 | Timothy Griffin | Method for Generating Energy in an Energy Generating Installation Having a Gas Turbine, and Energy Generating Installation Useful for Carrying Out the Method |
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| US20100326084A1 (en) * | 2009-03-04 | 2010-12-30 | Anderson Roger E | Methods of oxy-combustion power generation using low heating value fuel |
| EP2287456A1 (en) * | 2009-08-17 | 2011-02-23 | Alstom Technology Ltd | Gas turbine and method for operating a gas turbine |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701244A (en) * | 2017-11-02 | 2018-02-16 | 国电龙源节能技术有限公司 | Steam turbine coaxially drags the system and its combination method of two asynchronous generating units |
| CN110425569A (en) * | 2019-08-27 | 2019-11-08 | 华能国际电力股份有限公司 | A kind of combined cycle thermoelectric system and method using fume afterheat deep exploitation and flue gas recirculation |
| CN110989342A (en) * | 2019-11-19 | 2020-04-10 | 华北电力大学 | Real-time T-S fuzzy modeling method for combined cycle unit heavy-duty gas turbine |
| CN110989342B (en) * | 2019-11-19 | 2021-04-16 | 华北电力大学 | Real-time T-S fuzzy modeling method for combined cycle unit heavy-duty gas turbine |
| WO2022161113A1 (en) * | 2021-01-27 | 2022-08-04 | 李华玉 | Dual-fuel combined cycle power device |
| WO2022193796A1 (en) * | 2021-03-19 | 2022-09-22 | 李华玉 | Dual-fuel combined cycle power apparatus |
| CN114856735A (en) * | 2022-04-25 | 2022-08-05 | 中国能源建设集团江苏省电力设计院有限公司 | Air turbine coupling gas turbine power generation system based on compressed air energy storage |
| CN114856735B (en) * | 2022-04-25 | 2023-11-17 | 中国能源建设集团江苏省电力设计院有限公司 | Air turbine coupling gas turbine power generation system based on compressed air energy storage |
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Application publication date: 20120201 |