CN117662267A - Gas-steam combined cycle power device - Google Patents

Gas-steam combined cycle power device Download PDF

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Publication number
CN117662267A
CN117662267A CN202311260565.9A CN202311260565A CN117662267A CN 117662267 A CN117662267 A CN 117662267A CN 202311260565 A CN202311260565 A CN 202311260565A CN 117662267 A CN117662267 A CN 117662267A
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China
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communicated
gas
channel
steam
heat exchanger
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CN202311260565.9A
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Chinese (zh)
Inventor
李华玉
李鸿瑞
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Individual
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    • 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
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • 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
    • F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • 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
    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
    • 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
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/34—Gas-turbine plants characterised by the use of combustion products as the working fluid with recycling of part of the working fluid, i.e. semi-closed cycles with combustion products in the closed part of the cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
    • F02C7/08—Heating air supply before combustion, e.g. by exhaust gases
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention provides a gas-steam combined cycle power device, and belongs to the technical field of thermodynamics and thermal dynamics. The outside is provided with an air channel which is communicated with a compressor, the compressor is also provided with a first air channel which is communicated with an expander through a heat regenerator, the expander is also provided with an air channel which is communicated with the outside through an intermediate heat exchanger, the compressor is also provided with a second air channel which is communicated with a combustion chamber, the outside is also provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is also provided with a gas channel which is communicated with a gas turbine, and the gas turbine is also provided with a gas channel which is communicated with the outside through the heat regenerator and the intermediate heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the intermediate heat exchanger through a booster pump, the intermediate heat exchanger is further provided with a steam channel which is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also communicated with the outside through a cooling medium channel, and the expander and the gas turbine are connected with the compressor and transmit power to form the gas-steam combined cycle power plant.

Description

Gas-steam combined cycle power device
Technical field:
the invention belongs to the technical field of thermodynamics and thermal dynamics.
The background technology is as follows:
power and electricity are two basic and important demands in human life and production; in the process of converting thermal energy into mechanical energy, the most basic requirement is to adopt the simplest possible technical measure to realize the high efficiency of thermal work-for this purpose, and the technicians are diligent.
The gas-steam combined cycle power device is a main means for obtaining power by using high-quality fuel combustion to form high-temperature heat load. In order to improve the power application value of high-quality fuel, the temperature of fuel gas formed by burning the fuel is improved as much as possible, and the temperature and the quantity of heat load of the fuel gas discharged by the gas turbine device are reduced. However, the higher the initial temperature of the gas, the higher the temperature of the gas turbine exhaust gas increases, and the heat transfer temperature difference loss between the upper and lower cycles in the gas-steam combined cycle system increases; therefore, advanced technological approaches are needed to reduce the irreversible loss of temperature differentials in premium fuel power applications.
The invention provides a fuel gas-steam combined cycle power device which has reasonable flow and simple structure, can reduce irreversible loss of intermediate heat transfer temperature difference and realize high-quality fuel high-temperature heat load high-efficiency power application, and is based on the basic principle of simply, actively, safely and efficiently utilizing energy to obtain power.
The invention comprises the following steps:
the invention mainly aims to provide a gas-steam combined cycle power plant, and the specific invention is described as follows:
1. the gas-steam combined cycle power plant mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump and a condenser; the outside is provided with an air channel which is communicated with a compressor, the compressor is also provided with a first air channel which is communicated with an expander through a heat regenerator, the expander is also provided with an air channel which is communicated with the outside through an intermediate heat exchanger, the compressor is also provided with a second air channel which is communicated with a combustion chamber, the outside is also provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is also provided with a gas channel which is communicated with a gas turbine, and the gas turbine is also provided with a gas channel which is communicated with the outside through the heat regenerator and the intermediate heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the intermediate heat exchanger through a booster pump, the intermediate heat exchanger is further provided with a steam channel which is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also communicated with the outside through a cooling medium channel, and the expander and the gas turbine are connected with the compressor and transmit power to form the gas-steam combined cycle power plant.
2. The gas-steam combined cycle power plant mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump and a condenser; the outside is provided with an air channel which is communicated with a compressor, the compressor is also provided with a first air channel which is communicated with an expander through a heat regenerator, the expander is also provided with an air channel which is communicated with the outside through an intermediate heat exchanger, the compressor is also provided with a second air channel which is communicated with a combustion chamber, the outside is also provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is also provided with a gas channel which is communicated with a gas turbine, and the gas turbine is also provided with a gas channel which is communicated with the gas turbine through the intermediate heat exchanger after being communicated with the gas turbine; the condenser is provided with a condensate pipeline which is communicated with the intermediate heat exchanger through a booster pump, the intermediate heat exchanger is further provided with a steam channel which is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also communicated with the outside through a cooling medium channel, and the expander and the gas turbine are connected with the compressor and transmit power to form the gas-steam combined cycle power plant.
3. The gas-steam combined cycle power device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second regenerator; the outside is provided with an air channel which is communicated with the compressor, the compressor is also provided with a first air channel which is communicated with the expander through the heat regenerator, the expander is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger, the compressor is also provided with a second air channel which is communicated with the combustion chamber through the second heat regenerator, the outside is also provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is also provided with a gas channel which is communicated with the gas turbine, and the gas turbine is also provided with a gas channel which is communicated with the outside through the second heat regenerator, the heat regenerator and the intermediate heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the intermediate heat exchanger through a booster pump, the intermediate heat exchanger is further provided with a steam channel which is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also communicated with the outside through a cooling medium channel, and the expander and the gas turbine are connected with the compressor and transmit power to form the gas-steam combined cycle power plant.
4. The gas-steam combined cycle power device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second regenerator; the outside is provided with an air passage which is communicated with the compressor, the compressor is also provided with a first air passage which is communicated with the expander through the heat regenerator, the expander is also provided with an air passage which is communicated with the outside through the intermediate heat exchanger, the compressor is also provided with a second air passage which is communicated with the combustion chamber through the second heat regenerator, the outside is also provided with a fuel passage which is communicated with the combustion chamber, the combustion chamber is also provided with a gas passage which is communicated with the gas turbine, and the gas turbine is further provided with a gas passage which is communicated with the gas turbine through the intermediate heat exchanger after being communicated with the gas turbine through the second heat regenerator and the heat regenerator; the condenser is provided with a condensate pipeline which is communicated with the intermediate heat exchanger through a booster pump, the intermediate heat exchanger is further provided with a steam channel which is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also communicated with the outside through a cooling medium channel, and the expander and the gas turbine are connected with the compressor and transmit power to form the gas-steam combined cycle power plant.
5. The gas-steam combined cycle power device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second regenerator; the outside is provided with an air channel which is communicated with the compressor, the compressor is also provided with a first air channel which is communicated with the expander through the heat regenerator, the expander is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger, the compressor is also provided with a second air channel which is communicated with the compressor through the second heat regenerator, the compressor is also provided with an air channel which is communicated with the combustion chamber, the outside is also provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is also provided with a gas channel which is communicated with the gas turbine, and the gas turbine is also provided with a gas channel which is communicated with the outside through the second heat regenerator, the heat regenerator and the intermediate heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the intermediate heat exchanger through a booster pump, the intermediate heat exchanger is further provided with a steam channel which is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also communicated with the outside through a cooling medium channel, and the expander and the gas turbine are connected with the compressor and transmit power to form the gas-steam combined cycle power plant.
6. The gas-steam combined cycle power device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second regenerator; the outside is provided with an air channel which is communicated with the compressor, the compressor is also provided with a first air channel which is communicated with the expander through the heat regenerator, the expander is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger, the compressor is also provided with a second air channel which is communicated with the compressor through the second heat regenerator, the compressor is also provided with an air channel which is communicated with the combustion chamber, the outside is also provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is also provided with a gas channel which is communicated with the gas turbine, the gas turbine is also provided with a gas channel which is communicated with the compressor through the heat regenerator and the intermediate heat exchanger after the gas turbine is also provided with a gas channel which is communicated with the outside through the heat regenerator and the intermediate heat exchanger; the condenser is provided with a condensate pipeline which is communicated with the intermediate heat exchanger through a booster pump, the intermediate heat exchanger is further provided with a steam channel which is communicated with the steam turbine, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the condenser; the condenser is also communicated with the outside through a cooling medium channel, and the expander and the gas turbine are connected with the compressor and transmit power to form the gas-steam combined cycle power plant.
7. The gas-steam combined cycle power plant is characterized in that a diffuser pipe and a second intermediate heat exchanger are added in any one of the gas-steam combined cycle power plants in the 1 st to the 6 th, the communication between an air passage of the intermediate heat exchanger and the outside is adjusted to be that the air passage of the intermediate heat exchanger is communicated with the outside through the second intermediate heat exchanger, and the communication between the gas passage of the intermediate heat exchanger and the outside is adjusted to be that the gas passage of the intermediate heat exchanger is communicated with the outside through the second intermediate heat exchanger; the pressure boosting pump is communicated with the intermediate heat exchanger through a condensate pipeline, and the pressure boosting pump is communicated with the intermediate heat exchanger through a diffusion pipe after the condensate pipeline is communicated with the second intermediate heat exchanger, and then the second intermediate heat exchanger is communicated with the intermediate heat exchanger through a wet steam channel, so that the gas-steam combined cycle power device is formed.
8. The gas-steam combined cycle power plant is formed by adding a second booster pump and a low-temperature heat regenerator in any one of the gas-steam combined cycle power plants of the 1 st to 7 th, adjusting the communication of a condenser condensate pipe and the booster pump to the communication of the condenser condensate pipe and the low-temperature heat regenerator through the second booster pump, and adding a steam extraction channel to a steam turbine to communicate with the low-temperature heat regenerator, and communicating the low-temperature heat regenerator with the booster pump again to form the gas-steam combined cycle power plant.
9. The gas-steam combined cycle power plant is formed by adding an expansion speed increaser to any one of the gas-steam combined cycle power plants in the 7 th step and replacing a steam turbine.
10. The gas-steam combined cycle power plant is formed by adding an expansion speed increaser to replace a steam turbine, adding a newly added diffuser pipe and replacing a booster pump in any one of the gas-steam combined cycle power plants of 1-8.
Description of the drawings:
FIG. 1 is a schematic thermodynamic system diagram of a combined gas and steam cycle power plant according to the present invention.
FIG. 2 is a schematic thermodynamic system diagram of a combined gas and steam cycle power plant according to the present invention, principle 2.
FIG. 3 is a schematic thermodynamic system diagram of a gas-steam combined cycle power plant according to the present invention, in principle 3.
FIG. 4 is a schematic thermodynamic system diagram of a fuel gas-steam combined cycle power plant according to the present invention, no. 4.
FIG. 5 is a schematic thermodynamic system diagram of a gas-steam combined cycle power plant according to the present invention, in principle 5.
FIG. 6 is a schematic thermodynamic system diagram of a combined gas and steam cycle power plant according to the present invention.
FIG. 7 is a schematic thermodynamic system diagram of a 7 th principle of a combined gas and steam cycle power plant according to the present invention.
FIG. 8 is a schematic thermodynamic system diagram of a combined gas and steam cycle power plant according to the present invention, 8 th principles.
FIG. 9 is a schematic thermodynamic system diagram of a gas-steam combined cycle power plant according to the present invention, 9 th principles.
In the figure, a 1-compressor, a 2-expander, a 3-gas turbine, a 4-combustion chamber, a 5-regenerator, a 6-intermediate heat exchanger, a 7-turbine, an 8-booster pump, a 9-condenser, a 10-second regenerator, an 11-diffuser pipe, a 12-second intermediate heat exchanger, a 13-second booster pump, a 14-low temperature regenerator, an A-expansion speed increaser and a B-newly added diffuser pipe.
The following are also described here: taking fig. 1 as an example, for simplicity of drawing, "the expander 2 is also in communication with the outside via the intermediate heat exchanger 6" and "the gas turbine 3 is also in communication with the outside via the regenerator 5 and the intermediate heat exchanger 6" are represented in fig. 1 by sharing one passage with the air passage and the gas passage.
The specific embodiment is as follows:
it should be noted that the description of the structure and the flow is not repeated if necessary, and the obvious flow is not described. The invention is described in detail below with reference to the drawings and examples.
The gas-steam combined cycle power plant shown in fig. 1 is implemented as follows:
(1) Structurally, it mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump and a condenser; the outside is provided with an air channel which is communicated with the compressor 1, the compressor 1 is also provided with a first air channel which is communicated with the expander 2 through the heat regenerator 5, the expander 2 is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger 6, the compressor 1 is also provided with a second air channel which is communicated with the combustion chamber 4, the outside is also provided with a fuel channel which is communicated with the combustion chamber 4, the combustion chamber 4 is also provided with a gas channel which is communicated with the gas turbine 3, and the gas turbine 3 is also provided with a gas channel which is communicated with the outside through the heat regenerator 5 and the intermediate heat exchanger 6; the condenser 9 is provided with a condensate pipeline which is communicated with the intermediate heat exchanger 6 through a booster pump 8, then the intermediate heat exchanger 6 is further provided with a steam channel which is communicated with the steam turbine 7, and the steam turbine 7 is also provided with a low-pressure steam channel which is communicated with the condenser 9; the condenser 9 is also provided with a cooling medium passage communicating with the outside, and the expander 2 and the gas turbine 3 are connected to the compressor 1 and transmit power.
(2) In the flow, the external air enters the compressor 1 to be boosted and heated to a certain extent and then is divided into two paths, wherein the first path is subjected to heat absorption and heating through the heat regenerator 5, the second path is subjected to depressurization and work through the expander 2 and heat release and cooling through the intermediate heat exchanger 6 and then is discharged to the outside, and the second path is subjected to continuous boosting and heating and then enters the combustion chamber 4 to participate in combustion; the external fuel enters the combustion chamber 4, the fuel and the compressed air are mixed in the combustion chamber 4 and combusted to generate high-temperature fuel gas, the high-temperature fuel gas discharged by the combustion chamber 4 is depressurized and operated by the gas turbine 3, gradually releases heat and lowers temperature by the heat regenerator 5 and the intermediate heat exchanger 6, and is discharged to the outside; the condensate discharged by the condenser 9 is boosted by the booster pump 8, is subjected to heat absorption, temperature rise and vaporization by the intermediate heat exchanger 6, is subjected to pressure reduction and work by the steam turbine 7, and then enters the condenser 9 for heat release and condensation; the fuel provides driving heat load through the combustion chamber 4, the cooling medium takes away low-temperature heat load through the condenser 9, and the air and the fuel gas take away low-temperature heat load through the inlet and outlet flow; work output by the expander 2, the gas turbine 3 and the steam turbine 7 is provided for the compressor 1 and external power, or work output by the expander 2, the gas turbine 3 and the steam turbine 7 is provided for the compressor 1, the booster pump 8 and external power, so that a gas-steam combined cycle power device is formed.
The combined gas-steam cycle power plant shown in fig. 2 is implemented as follows:
(1) Structurally, it mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump and a condenser; the outside has air passage and compressor 1 to communicate, the compressor 1 has first air passage to communicate with expander 2 through the regenerator 5, the expander 2 has air passage to communicate with outside through the intermediate heat exchanger 6, the compressor 1 has second air passage to communicate with combustion chamber 4, the outside has fuel passage to communicate with combustion chamber 4, combustion chamber 4 has gas passage to communicate with gas turbine 3, gas turbine 3 has gas passage to communicate with oneself through the regenerator 5, gas turbine 3 has gas passage to communicate with outside through the intermediate heat exchanger 6 again after gas passage is communicated with oneself; the condenser 9 is provided with a condensate pipeline which is communicated with the intermediate heat exchanger 6 through a booster pump 8, then the intermediate heat exchanger 6 is further provided with a steam channel which is communicated with the steam turbine 7, and the steam turbine 7 is also provided with a low-pressure steam channel which is communicated with the condenser 9; the condenser 9 is also provided with a cooling medium passage communicating with the outside, and the expander 2 and the gas turbine 3 are connected to the compressor 1 and transmit power.
(2) In flow, compared with the gas-steam combined cycle power plant shown in fig. 1, the difference is that: the high-temperature gas discharged by the combustion chamber 4 enters the gas turbine 3 to perform depressurization and work, flows through the regenerator 5 to release heat and cool to a certain extent, enters the gas turbine 3 to continue depressurization and work, flows through the intermediate heat exchanger 6 to release heat and cool and is discharged to the outside, and a gas-steam combined cycle power device is formed.
The combined gas-steam cycle power plant shown in fig. 3 is implemented as follows:
(1) Structurally, the device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a heat regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second heat regenerator; the outside is provided with an air passage which is communicated with the compressor 1, the compressor 1 is also provided with a first air passage which is communicated with the expander 2 through the heat regenerator 5, the expander 2 is also provided with an air passage which is communicated with the outside through the intermediate heat exchanger 6, the compressor 1 is also provided with a second air passage which is communicated with the combustion chamber 4 through the second heat regenerator 10, the outside is also provided with a fuel passage which is communicated with the combustion chamber 4, the combustion chamber 4 is also provided with a gas passage which is communicated with the gas turbine 3, and the gas turbine 3 is also provided with a gas passage which is communicated with the outside through the second heat regenerator 10, the heat regenerator 5 and the intermediate heat exchanger 6; the condenser 9 is provided with a condensate pipeline which is communicated with the intermediate heat exchanger 6 through a booster pump 8, then the intermediate heat exchanger 6 is further provided with a steam channel which is communicated with the steam turbine 7, and the steam turbine 7 is also provided with a low-pressure steam channel which is communicated with the condenser 9; the condenser 9 is also provided with a cooling medium passage communicating with the outside, and the expander 2 and the gas turbine 3 are connected to the compressor 1 and transmit power.
(2) In flow, compared with the gas-steam combined cycle power plant shown in fig. 1, the difference is that: the second path of air discharged by the compressor 1 flows through the second heat regenerator 10 to absorb heat and raise temperature, and then enters the combustion chamber 4 to participate in combustion; the gas discharged by the gas turbine 3 is gradually released and cooled through the second heat regenerator 10, the heat regenerator 5 and the intermediate heat exchanger 6, and then is discharged to the outside, so that the gas-steam combined cycle power device is formed.
The combined gas-steam cycle power plant shown in fig. 4 is implemented as follows:
(1) Structurally, the device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a heat regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second heat regenerator; the outside is provided with an air channel which is communicated with the compressor 1, the compressor 1 is also provided with a first air channel which is communicated with the expander 2 through the heat regenerator 5, the expander 2 is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger 6, the compressor 1 is also provided with a second air channel which is communicated with the combustion chamber 4 through the second heat regenerator 10, the outside is also provided with a fuel channel which is communicated with the combustion chamber 4, the combustion chamber 4 is also provided with a gas channel which is communicated with the gas turbine 3, and the gas turbine 3 is also provided with a gas channel which is communicated with the gas turbine 3 after being communicated with the gas turbine 3 through the intermediate heat exchanger 6 after being communicated with the gas turbine 3 through the second heat regenerator 10 and the heat regenerator 5; the condenser 9 is provided with a condensate pipeline which is communicated with the intermediate heat exchanger 6 through a booster pump 8, then the intermediate heat exchanger 6 is further provided with a steam channel which is communicated with the steam turbine 7, and the steam turbine 7 is also provided with a low-pressure steam channel which is communicated with the condenser 9; the condenser 9 is also provided with a cooling medium passage communicating with the outside, and the expander 2 and the gas turbine 3 are connected to the compressor 1 and transmit power.
(2) In flow, compared with the gas-steam combined cycle power plant shown in fig. 1, the difference is that: the second path of air discharged by the compressor 1 flows through the second heat regenerator 10 to absorb heat and raise temperature, and enters the combustion chamber 4 to participate in combustion; the high-temperature gas discharged by the combustion chamber 4 enters the gas turbine 3 to perform depressurization and work, flows through the second heat regenerator 10 and the heat regenerator 5 to gradually release heat and cool to a certain extent, then enters the gas turbine 3 to continue depressurization and work, and then flows through the intermediate heat exchanger 6 to release heat and cool and discharge to the outside to form the gas-steam combined cycle power device.
The combined gas-steam cycle power plant shown in fig. 5 is implemented as follows:
(1) Structurally, the device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a heat regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second heat regenerator; the outside is provided with an air channel which is communicated with the compressor 1, the compressor 1 is also provided with a first air channel which is communicated with the expander 2 through the heat regenerator 5, the expander 2 is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger 6, the compressor 1 is also provided with a second air channel which is communicated with the compressor 1 through the second heat regenerator 10, then the compressor 1 is also provided with an air channel which is communicated with the combustion chamber 4, the outside is also provided with a fuel channel which is communicated with the combustion chamber 4, the combustion chamber 4 is also provided with a gas channel which is communicated with the gas turbine 3, and the gas turbine 3 is also provided with a gas channel which is communicated with the outside through the second heat regenerator 10, the heat regenerator 5 and the intermediate heat exchanger 6; the condenser 9 is provided with a condensate pipeline which is communicated with the intermediate heat exchanger 6 through a booster pump 8, then the intermediate heat exchanger 6 is further provided with a steam channel which is communicated with the steam turbine 7, and the steam turbine 7 is also provided with a low-pressure steam channel which is communicated with the condenser 9; the condenser 9 is also provided with a cooling medium passage communicating with the outside, and the expander 2 and the gas turbine 3 are connected to the compressor 1 and transmit power.
(2) In flow, compared with the gas-steam combined cycle power plant shown in fig. 1, the difference is that: the external air enters the compressor 1 to be boosted and heated to a certain extent and then is divided into two paths, wherein the first path flows through the heat regenerator 5 to absorb heat and then enters the expander 2 to be decompressed and work, and the second path continuously boosts and heats to a certain extent and then enters the second heat regenerator 10 to absorb heat and heat; the air discharged by the second heat regenerator 10 enters the compressor 1 to continuously boost and heat, and then enters the combustion chamber 4 to participate in combustion; the high-temperature gas discharged by the combustion chamber 4 is depressurized and works through the gas turbine 3, gradually releases heat and lowers temperature through the second heat regenerator 10, the heat regenerator 5 and the intermediate heat exchanger 6, and is discharged to the outside to form the gas-steam combined cycle power device.
The combined gas-steam cycle power plant shown in fig. 6 is implemented as follows:
(1) Structurally, the device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a heat regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second heat regenerator; the outside is provided with an air channel which is communicated with the compressor 1, the compressor 1 is also provided with a first air channel which is communicated with the expander 2 through a heat regenerator 5, the expander 2 is also provided with an air channel which is communicated with the outside through an intermediate heat exchanger 6, the compressor 1 is also provided with a second air channel which is communicated with the compressor through a second heat regenerator 10, then the compressor 1 is also provided with an air channel which is communicated with the combustion chamber 4, the outside is also provided with a fuel channel which is communicated with the combustion chamber 4, the combustion chamber 4 is also provided with a gas channel which is communicated with the gas turbine 3, and the gas turbine 3 is also provided with a gas channel which is communicated with the outside through the heat regenerator 5 and the intermediate heat exchanger 6 after the gas channel is also provided with the gas channel which is communicated with the compressor 3 through the second heat regenerator 10; the condenser 9 is provided with a condensate pipeline which is communicated with the intermediate heat exchanger 6 through a booster pump 8, then the intermediate heat exchanger 6 is further provided with a steam channel which is communicated with the steam turbine 7, and the steam turbine 7 is also provided with a low-pressure steam channel which is communicated with the condenser 9; the condenser 9 is also provided with a cooling medium passage communicating with the outside, and the expander 2 and the gas turbine 3 are connected to the compressor 1 and transmit power.
(2) In flow, compared with the gas-steam combined cycle power plant shown in fig. 1, the difference is that: the external air enters the compressor 1 to be boosted and heated to a certain extent and then is divided into two paths, wherein the first path flows through the heat regenerator 5 to absorb heat and then enters the expander 2 to be decompressed and work, and the second path continuously boosts and heats to a certain extent and then enters the second heat regenerator 10 to absorb heat and heat; the air discharged by the second heat regenerator 10 enters the compressor 1 to continuously boost and heat, and then enters the combustion chamber 4 to participate in combustion; the high-temperature gas discharged by the combustion chamber 4 enters the gas turbine 3 to perform depressurization and work, flows through the second heat regenerator 10 to release heat and cool to a certain extent, then enters the gas turbine 3 to continue depressurization and work, and then flows through the heat regenerator 5 and the intermediate heat exchanger 6 to perform gradual heat release and cool down and discharge to the outside, so that the gas-steam combined cycle power device is formed.
The combined gas-steam cycle power plant shown in fig. 7 is implemented as follows:
(1) In the structure, in the gas-steam combined cycle power plant shown in fig. 1, a diffuser pipe and a second intermediate heat exchanger are added, the communication between the air passage of the intermediate heat exchanger 6 and the outside is adjusted to be that the air passage of the intermediate heat exchanger 6 is communicated with the outside through the second intermediate heat exchanger 12, and the communication between the gas passage of the intermediate heat exchanger 6 and the outside is adjusted to be that the gas passage of the intermediate heat exchanger 6 is communicated with the outside through the second intermediate heat exchanger 12; the booster pump 8 with condensate line is connected to the intermediate heat exchanger 6, so that after the booster pump 8 with condensate line to the second intermediate heat exchanger 12, the second intermediate heat exchanger 12 is connected to the intermediate heat exchanger 6 via a diffuser 11.
(2) In flow, compared with the gas-steam combined cycle power plant shown in fig. 1, the difference is that: the air discharged from the expander 2 is gradually released and cooled through the intermediate heat exchanger 6 and the second intermediate heat exchanger 12, and then discharged to the outside; the fuel gas discharged by the heat regenerator 5 flows through the intermediate heat exchanger 6 and the second intermediate heat exchanger 12 to release heat and cool gradually, and then is discharged to the outside; the condensate discharged from the condenser 9 is boosted by the booster pump 8, is subjected to heat absorption and temperature rise, partial vaporization and speed increase by the second intermediate heat exchanger 12, is subjected to speed reduction and pressure boost by the diffuser pipe 11, is subjected to heat absorption and vaporization by the intermediate heat exchanger 6, and then enters the steam turbine 7 to be subjected to pressure reduction and work to form the gas-steam combined cycle power plant.
The combined gas-steam cycle power plant shown in fig. 8 is implemented as follows:
(1) Structurally, in the gas-steam combined cycle power device shown in fig. 1, a second booster pump and a low-temperature heat regenerator are added, a condensate pipe of the condenser 9 is communicated with the booster pump 8, the condensate pipe of the condenser 9 is communicated with the low-temperature heat regenerator 14 through the second booster pump 13, a steam turbine 7 is additionally provided with a steam extraction channel to be communicated with the low-temperature heat regenerator 14, and the condensate pipe of the low-temperature heat regenerator 14 is communicated with the booster pump 8.
(2) In flow, compared with the gas-steam combined cycle power plant shown in fig. 1, the difference is that: the condensate discharged by the condenser 9 flows through the second booster pump 13 to be boosted and then enters the low-temperature regenerator 14 to be mixed with the extraction steam from the steam turbine 7, absorbs heat and heats up, and the extraction steam is released to form condensate; condensate of the low-temperature heat regenerator 14 is boosted by the booster pump 8, is subjected to heat absorption, temperature rise and vaporization by the intermediate heat exchanger 6, and then enters the steam turbine 7 to be subjected to pressure reduction and work; the steam entering the steam turbine 7 is decompressed and worked, and is divided into two paths after reaching a certain degree, wherein the first path is provided for the low-temperature heat regenerator 14, and the second path is continuously decompressed and worked, enters the condenser 9 to release heat and condense, so that the gas-steam combined cycle power device is formed.
The combined gas-steam cycle power plant shown in fig. 9 is implemented as follows:
(1) Structurally, in the gas-steam combined cycle power plant shown in fig. 1, an expansion speed increaser a is added to replace a steam turbine 7, and a new diffuser pipe B is added to replace a booster pump 8.
(2) In flow, compared with the gas-steam combined cycle power plant shown in fig. 1, the difference is that: the condensate of the condenser 9 is subjected to speed reduction and pressure increase through a newly added diffuser pipe B, is subjected to heat absorption, temperature rise and vaporization through an intermediate heat exchanger 6, is subjected to pressure reduction, work and speed increase through an expansion speed increaser A, and then enters the condenser 9 to release heat and be condensed; work output by the expander 2, the gas turbine 3 and the expansion speed increaser A is provided for the compressor 1 and external power to form a gas-steam combined cycle power plant.
The gas-steam combined cycle power device provided by the invention has the following effects and advantages:
(1) The combustion products are directly used as the circulating working medium, and the driving heat load formed by the high-quality fuel is utilized in a grading way, so that the heat efficiency is improved.
(2) In the power application process of the gas turbine for discharging the gas heat load, the temperature difference loss is small in the process of acquiring the heat load by the heat regenerator; compared with the prior art, the irreversible loss of the temperature difference in the heat transfer process between the upper and lower circulation subsystems is obviously reduced.
(3) The thermodynamic perfection of the thermal power system is obviously improved, the high-temperature heat load high-efficiency power utilization of the high-quality fuel is realized, and the high-temperature heat load utilization level and value of the high-quality fuel are improved.
(4) The flow is reasonable, the structure is simple, the manufacturing cost of the thermal power changing device is reduced, and the economical efficiency of the system is improved.
(5) By utilizing the characteristics of working media, the temperature difference utilization level in the heat transfer process is obviously improved by adopting a simple technical means, and the heat efficiency is improved.
(6) And a plurality of regenerative technical means are provided, so that the coordination among the load, the thermal efficiency and the step-up ratio of the device is improved.
(7) The method provides a plurality of specific technical schemes, is beneficial to improving the reasonable utilization level of energy and expanding the application range and the value of the fuel gas-steam combined cycle power plant.

Claims (10)

1. The gas-steam combined cycle power plant mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump and a condenser; the outside is provided with an air channel which is communicated with the compressor (1), the compressor (1) is also provided with a first air channel which is communicated with the expander (2) through the heat regenerator (5), the expander (2) is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger (6), the compressor (1) is also provided with a second air channel which is communicated with the combustion chamber (4), the outside is also provided with a fuel channel which is communicated with the combustion chamber (4), the combustion chamber (4) is also provided with a gas channel which is communicated with the gas turbine (3), and the gas turbine (3) is also provided with a gas channel which is communicated with the outside through the heat regenerator (5) and the intermediate heat exchanger (6); the condenser (9) is provided with a condensate pipeline which is communicated with the intermediate heat exchanger (6) through a booster pump (8), the intermediate heat exchanger (6) is further provided with a steam channel which is communicated with the steam turbine (7), and the steam turbine (7) is also provided with a low-pressure steam channel which is communicated with the condenser (9); the condenser (9) is also communicated with the outside through a cooling medium channel, and the expander (2) and the gas turbine (3) are connected with the compressor (1) and transmit power to form the gas-steam combined cycle power device.
2. The gas-steam combined cycle power plant mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump and a condenser; the outside is provided with an air channel which is communicated with the compressor (1), the compressor (1) is also provided with a first air channel which is communicated with the expander (2) through the heat regenerator (5), the expander (2) is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger (6), the compressor (1) is also provided with a second air channel which is communicated with the combustion chamber (4), the outside is also provided with a fuel channel which is communicated with the combustion chamber (4), the combustion chamber (4) is also provided with a gas channel which is communicated with the gas turbine (3), and after the gas turbine (3) is also provided with a gas channel which is communicated with the gas turbine (3) through the heat regenerator (5), the gas channel is also provided with a gas channel which is communicated with the outside through the intermediate heat exchanger (6); the condenser (9) is provided with a condensate pipeline which is communicated with the intermediate heat exchanger (6) through a booster pump (8), the intermediate heat exchanger (6) is further provided with a steam channel which is communicated with the steam turbine (7), and the steam turbine (7) is also provided with a low-pressure steam channel which is communicated with the condenser (9); the condenser (9) is also communicated with the outside through a cooling medium channel, and the expander (2) and the gas turbine (3) are connected with the compressor (1) and transmit power to form the gas-steam combined cycle power device.
3. The gas-steam combined cycle power device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second regenerator; the outside is provided with an air channel which is communicated with the compressor (1), the compressor (1) is also provided with a first air channel which is communicated with the expander (2) through the heat regenerator (5), the expander (2) is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger (6), the compressor (1) is also provided with a second air channel which is communicated with the combustion chamber (4) through the second heat regenerator (10), the outside is also provided with a fuel channel which is communicated with the combustion chamber (4), the combustion chamber (4) is also provided with a gas channel which is communicated with the gas turbine (3), and the gas turbine (3) is also provided with a gas channel which is communicated with the outside through the second heat regenerator (10), the heat regenerator (5) and the intermediate heat exchanger (6); the condenser (9) is provided with a condensate pipeline which is communicated with the intermediate heat exchanger (6) through a booster pump (8), the intermediate heat exchanger (6) is further provided with a steam channel which is communicated with the steam turbine (7), and the steam turbine (7) is also provided with a low-pressure steam channel which is communicated with the condenser (9); the condenser (9) is also communicated with the outside through a cooling medium channel, and the expander (2) and the gas turbine (3) are connected with the compressor (1) and transmit power to form the gas-steam combined cycle power device.
4. The gas-steam combined cycle power device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second regenerator; the outside is provided with an air channel which is communicated with the compressor (1), the compressor (1) is also provided with a first air channel which is communicated with the expander (2) through the heat regenerator (5), the expander (2) is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger (6), the compressor (1) is also provided with a second air channel which is communicated with the combustion chamber (4) through the second heat regenerator (10), the outside is also provided with a fuel channel which is communicated with the combustion chamber (4), the combustion chamber (4) is also provided with a gas channel which is communicated with the gas turbine (3), and the gas turbine (3) is also provided with a gas channel which is communicated with the outside through the intermediate heat exchanger (6) after the gas channel is communicated with the gas turbine (3) through the second heat regenerator (10) and the heat regenerator (5); the condenser (9) is provided with a condensate pipeline which is communicated with the intermediate heat exchanger (6) through a booster pump (8), the intermediate heat exchanger (6) is further provided with a steam channel which is communicated with the steam turbine (7), and the steam turbine (7) is also provided with a low-pressure steam channel which is communicated with the condenser (9); the condenser (9) is also communicated with the outside through a cooling medium channel, and the expander (2) and the gas turbine (3) are connected with the compressor (1) and transmit power to form the gas-steam combined cycle power device.
5. The gas-steam combined cycle power device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second regenerator; the outside is provided with an air channel which is communicated with the compressor (1), the compressor (1) is also provided with a first air channel which is communicated with the expander (2) through the heat regenerator (5), the expander (2) is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger (6), the compressor (1) is also provided with a second air channel which is communicated with the compressor (1) through the second heat regenerator (10), the compressor (1) is also provided with an air channel which is communicated with the combustion chamber (4), the outside is also provided with a fuel channel which is communicated with the combustion chamber (4), the combustion chamber (4) is also provided with a fuel gas channel which is communicated with the gas turbine (3), and the gas turbine (3) is also provided with a fuel gas channel which is communicated with the outside through the second heat regenerator (10), the heat regenerator (5) and the intermediate heat exchanger (6); the condenser (9) is provided with a condensate pipeline which is communicated with the intermediate heat exchanger (6) through a booster pump (8), the intermediate heat exchanger (6) is further provided with a steam channel which is communicated with the steam turbine (7), and the steam turbine (7) is also provided with a low-pressure steam channel which is communicated with the condenser (9); the condenser (9) is also communicated with the outside through a cooling medium channel, and the expander (2) and the gas turbine (3) are connected with the compressor (1) and transmit power to form the gas-steam combined cycle power device.
6. The gas-steam combined cycle power device mainly comprises a compressor, an expander, a gas turbine, a combustion chamber, a regenerator, an intermediate heat exchanger, a steam turbine, a booster pump, a condenser and a second regenerator; the outside is provided with an air channel which is communicated with the compressor (1), the compressor (1) is also provided with a first air channel which is communicated with the expander (2) through the heat regenerator (5), the expander (2) is also provided with an air channel which is communicated with the outside through the intermediate heat exchanger (6), the compressor (1) is also provided with a second air channel which is communicated with the compressor through the second heat regenerator (10) and then is communicated with the combustion chamber (4), the outside is also provided with a fuel channel which is communicated with the combustion chamber (4), the combustion chamber (4) is also provided with a gas channel which is communicated with the gas turbine (3), and the gas turbine (3) is also provided with a gas channel which is communicated with the outside through the heat regenerator (5) and the intermediate heat exchanger (6) after the gas channel is also communicated with the compressor (3) through the second heat regenerator (10); the condenser (9) is provided with a condensate pipeline which is communicated with the intermediate heat exchanger (6) through a booster pump (8), the intermediate heat exchanger (6) is further provided with a steam channel which is communicated with the steam turbine (7), and the steam turbine (7) is also provided with a low-pressure steam channel which is communicated with the condenser (9); the condenser (9) is also communicated with the outside through a cooling medium channel, and the expander (2) and the gas turbine (3) are connected with the compressor (1) and transmit power to form the gas-steam combined cycle power device.
7. In the fuel gas-steam combined cycle power plant, a diffuser pipe and a second intermediate heat exchanger are added in any one of the fuel gas-steam combined cycle power plants of claims 1-6, the air passage of the intermediate heat exchanger (6) is communicated with the outside and is adjusted to be communicated with the outside through the second intermediate heat exchanger (12), and the fuel gas passage of the intermediate heat exchanger (6) is communicated with the outside and is adjusted to be communicated with the outside through the second intermediate heat exchanger (12); the condensate pipeline of the booster pump (8) is communicated with the intermediate heat exchanger (6) and is adjusted to be that after the condensate pipeline of the booster pump (8) is communicated with the second intermediate heat exchanger (12), the second intermediate heat exchanger (12) is communicated with the intermediate heat exchanger (6) through a diffusion pipe (11) to form the gas-steam combined cycle power device.
8. A gas-steam combined cycle power plant is characterized in that a second booster pump and a low-temperature heat regenerator are added in any one of the gas-steam combined cycle power plants in claims 1-7, a condensate pipe of a condenser (9) is communicated with the booster pump (8) and is adjusted to be communicated with the low-temperature heat regenerator (14) through the second booster pump (13), a steam extraction channel is additionally arranged in a steam turbine (7) and is communicated with the low-temperature heat regenerator (14), and a condensate pipe of the low-temperature heat regenerator (14) is communicated with the booster pump (8) to form the gas-steam combined cycle power plant.
9. The gas-steam combined cycle power plant is formed by adding an expansion speed increaser (A) and replacing a steam turbine (7) in any one of the gas-steam combined cycle power plants in claim 7.
10. In the fuel gas-steam combined cycle power plant, an expansion speed increaser (A) is added to replace a steam turbine (7), a new diffusion pipe (B) is added to replace a booster pump (8) in any one of the fuel gas-steam combined cycle power plants of claims 1-8, so that the fuel gas-steam combined cycle power plant is formed.
CN202311260565.9A 2022-09-27 2023-09-23 Gas-steam combined cycle power device Pending CN117662267A (en)

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CN202211250190 2022-09-27
CN2022112501903 2022-09-27

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