CN117189291A - Gas-steam combined cycle power device - Google Patents
Gas-steam combined cycle power device Download PDFInfo
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- CN117189291A CN117189291A CN202310193107.1A CN202310193107A CN117189291A CN 117189291 A CN117189291 A CN 117189291A CN 202310193107 A CN202310193107 A CN 202310193107A CN 117189291 A CN117189291 A CN 117189291A
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 104
- 239000000446 fuel Substances 0.000 claims abstract description 35
- 239000002826 coolant Substances 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 129
- 238000004891 communication Methods 0.000 claims description 12
- 239000002737 fuel gas Substances 0.000 claims description 12
- 238000009792 diffusion process Methods 0.000 claims description 11
- 238000000605 extraction Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000013021 overheating Methods 0.000 description 3
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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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 provides a gas-steam combined cycle power device, and belongs to the technical field of thermodynamics and thermal dynamics. The condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the high-temperature heat exchanger, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the steam turbine through a combustion chamber, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the outside is provided with an air channel which is communicated with the combustion chamber through the second compressor, the outside is provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is provided with a gas channel which is communicated with the gas turbine, and the gas turbine is provided with a gas channel which is communicated with the outside through the high-temperature heat exchanger; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power to form the gas-steam combined cycle power device.
Description
Technical field:
the invention belongs to the technical field of thermodynamics and thermal dynamics.
The background technology is as follows:
cold demand, heat demand, and power demand are common in human life and production; the chemical energy of the fuel is converted into heat energy through combustion, and then the heat energy is efficiently converted into mechanical energy through a thermal device, so that the thermal energy is an important means for providing power or electric power for human beings.
In a conventional gas-steam power device, high-quality energy sources such as gasoline, diesel oil and natural gas are used as fuel, the brayton cycle is used for converting high-temperature heat energy into mechanical energy, and the Rankine cycle is used for converting medium-temperature heat energy into mechanical energy, so that the stepwise utilization of heat energy is realized, and reasonable heat change work efficiency is obtained. From a component point of view, among the core components, gas turbines, steam turbines and air compressors, the position of the air compressor is of vital importance: on the one hand, it is desirable that the air compressor achieve a higher boost ratio to increase the temperature of the air after compression; on the other hand, there is a certain contradiction between the step-up ratio and the air flow rate; furthermore, the irreversibility of the compression process results in energy losses. In order to reduce the temperature of the premium fuel combustion products, the air compressor provides an amount of air to the combustion chamber that far exceeds the amount of air required for fuel combustion; obviously, reducing the load of the air compressor to a greater extent does not affect the normal combustion of the fuel, i.e. does not affect the input of the high temperature driving heat load.
Based on the basic principle of simply, actively, safely and efficiently utilizing fuel to obtain power, the invention provides the fuel gas-steam combined cycle power device with low excess air coefficient, and the improvement of the heat change work efficiency of the device and the reduction of the manufacturing cost are realized.
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 steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine and a combustion chamber; the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the high-temperature heat exchanger, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the steam turbine through a combustion chamber, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the outside is provided with an air channel which is communicated with the combustion chamber through the second compressor, the outside is provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is provided with a gas channel which is communicated with the gas turbine, and the gas turbine is provided with a gas channel which is communicated with the outside through the high-temperature heat exchanger; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power to form the gas-steam combined cycle power device.
2. The gas-steam combined cycle power device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature regenerator; the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the high-temperature heat exchanger, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the steam turbine through a combustion chamber, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the outside is provided with an air channel which is communicated with the combustion chamber through the second compressor and the high-temperature heat regenerator, the outside is provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is provided with a gas channel which is communicated with the gas turbine, and the gas turbine is provided with a gas channel which is communicated with the outside through the high-temperature heat regenerator and the high-temperature heat exchanger; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power to form the gas-steam combined cycle power device.
3. The gas-steam combined cycle power device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature regenerator; the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the high-temperature heat exchanger, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the steam turbine through a combustion chamber, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the outside is provided with an air channel which is communicated with the combustion chamber through the second compressor and the high-temperature heat regenerator, the outside is provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is provided with a gas channel which is communicated with the gas turbine, and then the gas turbine is provided with a gas channel which is communicated with the combustion chamber through the high-temperature heat regenerator, and the gas turbine is provided with a gas channel which is communicated with the outside through the high-temperature heat exchanger; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power to form the gas-steam combined cycle power device.
4. The gas-steam combined cycle power device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature regenerator; the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the high-temperature heat exchanger, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the steam turbine through a combustion chamber, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the second compressor is further provided with an air channel which is communicated with the second compressor through a high-temperature heat regenerator after the air channel is communicated with the second compressor, the second compressor is further provided with an air channel which is communicated with a combustion chamber, the outside is further provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is further provided with a gas channel which is communicated with a gas turbine, and the gas turbine is further provided with a gas channel which is communicated with the outside through the high-temperature heat regenerator and the high-temperature heat exchanger; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power to form the gas-steam combined cycle power device.
5. The gas-steam combined cycle power device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature regenerator; the condenser is provided with a condensate pipeline which is communicated with the evaporator through a booster pump, then the evaporator is provided with a steam channel which is communicated with the high-temperature heat exchanger, the compressor is provided with a steam channel which is communicated with the high-temperature heat exchanger, the high-temperature heat exchanger is also provided with a steam channel which is communicated with the steam turbine through a combustion chamber, and the steam turbine is also provided with a low-pressure steam channel which is communicated with the evaporator and then is divided into two paths, namely a first path which is communicated with the compressor and a second path which is communicated with the condenser; the second compressor is further provided with an air channel which is communicated with the second compressor through the high-temperature heat regenerator after the air channel is communicated with the second compressor, the second compressor is further provided with an air channel which is communicated with the combustion chamber, the outside is further provided with a fuel channel which is communicated with the combustion chamber, the combustion chamber is further provided with a gas channel which is communicated with the gas turbine, and the gas turbine is further provided with a gas channel which is communicated with the second compressor through the high-temperature heat regenerator, and the gas turbine is further provided with a gas channel which is communicated with the outside through the high-temperature heat exchanger; the condenser is also provided with a cooling medium channel which is communicated with the outside, the steam turbine is connected with the compressor and transmits power, and the gas turbine is connected with the second compressor and transmits power to form the gas-steam combined cycle power device.
6. The gas-steam combined cycle power plant is characterized in that in any one of the gas-steam combined cycle power plants in the 1 st to the 5 th, a gas channel is additionally arranged on an evaporator and communicated with the outside, so that the gas-steam combined cycle power plant is formed.
7. 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 the 6 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 the compressor to communicate with the low-temperature heat regenerator, wherein the low-temperature heat regenerator is further communicated with the booster pump through the condensate pipe.
8. The gas-steam combined cycle power plant is formed by adjusting the communication between a low-pressure steam channel of a steam turbine and an evaporator in any one of the gas-steam combined cycle power plants of 1-7 to the communication between an intermediate steam channel of the steam turbine and the evaporator, and then communicating the low-pressure steam channel of the steam turbine with the evaporator after the communication between the intermediate steam channel of the steam turbine and the high-temperature heat exchanger.
9. The gas-steam combined cycle power plant is formed by adding a new evaporator and a new diffusion pipe in any one of the gas-steam combined cycle power plants of the 1 st to 8 th, adjusting the connection between a condensate pipe of a booster pump and the evaporator to the connection between the condensate pipe of the booster pump and the evaporator through the new evaporator and the new diffusion pipe, adjusting the connection between a low-pressure steam passage of a steam turbine and the evaporator to the connection between the low-pressure steam passage of the steam turbine and the new evaporator through the evaporator and the connection between the new evaporator or the gas passage and the outside.
10. The gas-steam combined cycle power plant is formed by adjusting the communication between the low-pressure steam passage of the steam turbine and the evaporator to the communication between the low-pressure steam passage of the steam turbine and the evaporator through the high-temperature heat exchanger in any one of the gas-steam combined cycle power plants of the 1 st to the 7 th.
11. The gas-steam combined cycle power plant is characterized in that in any one of the gas-steam combined cycle power plant in the 10 th aspect, a new evaporator and a new diffusion pipe are added, a condensate pipe with a booster pump is communicated with the evaporator and is adjusted to be communicated with the evaporator through the new evaporator and the new diffusion pipe, a low-pressure steam channel with a steam turbine is communicated with the evaporator through a high-temperature heat exchanger and then is divided into two paths, and the low-pressure steam channel with the steam turbine is divided into two paths after being communicated with the new evaporator through the high-temperature heat exchanger and the evaporator, and the new evaporator or the gas channel is communicated with the outside, so that the gas-steam combined cycle power plant is formed.
12. The gas-steam combined cycle power plant is characterized in that an expansion speed increaser is added to replace a steam turbine, a dual-energy compressor is added to replace a compressor, a diffusion pipe is added to replace a booster pump in any one of the gas-steam combined cycle power plants in the 1 st to the 6 th; the expansion speed increaser is connected with the dual-energy compressor and transmits power to form the gas-steam combined cycle power device.
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.
FIG. 10 is a schematic thermodynamic system diagram of a combined gas and steam cycle power plant according to the 10 th principle of the present invention.
FIG. 11 is a schematic thermodynamic system diagram of a combined gas and steam cycle power plant 11 according to the present invention.
In the figure, a 1-turbine, a 2-compressor, a 3-booster pump, a 4-condenser, a 5-evaporator (waste heat boiler), a 6-high temperature heat exchanger, a 7-second compressor, an 8-gas turbine, a 9-combustion chamber, a 10-high temperature regenerator, a 11-second booster pump, a 12-low temperature regenerator, a 13-expansion speed increaser, a 14-dual-energy compressor and a 15-diffuser pipe; a is an additional evaporator, and B is an additional diffuser.
The specific embodiment is as follows:
it is to be noted that the description of the structure and the flow is not repeated if necessary; obvious procedures are 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 turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine and a combustion chamber; the condenser 4 is provided with a condensate pipeline which is communicated with the evaporator 5 through the booster pump 3, then the evaporator 5 is provided with a steam channel which is communicated with the high-temperature heat exchanger 6, the compressor 2 is provided with a steam channel which is communicated with the high-temperature heat exchanger 6, the high-temperature heat exchanger 6 is also provided with a steam channel which is communicated with the steam turbine 1 through the combustion chamber 9, and the steam turbine 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 5 and then is divided into two paths, namely a first path which is communicated with the compressor 2 and a second path which is communicated with the condenser 4; the outside is provided with an air channel which is communicated with the combustion chamber 9 through the second compressor 7, the outside is provided with a fuel channel which is communicated with the combustion chamber 9, the combustion chamber 9 is provided with a gas channel which is communicated with the gas turbine 8, and the gas turbine 8 is provided with a gas channel which is communicated with the outside through the high-temperature heat exchanger 6; the condenser 4 is also provided with a cooling medium passage communicated with the outside, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) In the flow, the external air flows through the second compressor 7 to be boosted and heated, then enters the combustion chamber 9, the external fuel enters the combustion chamber 9, and the fuel and the air are mixed in the combustion chamber 9 and burnt into high-temperature fuel gas; the fuel gas produced by the combustion chamber 9 is depressurized and works through the gas turbine 8, is discharged to the outside after being cooled through the high-temperature heat exchanger 6; the condensate of the condenser 4 is boosted by the booster pump 3, is subjected to heat absorption and temperature rise, vaporization and overheating by the evaporator 5, and then enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature, and the steam discharged by the compressor 2 enters the high-temperature heat exchanger 6 to absorb heat and raise the temperature; the steam discharged by the high-temperature heat exchanger 6 flows through the combustion chamber 9 to absorb heat and raise temperature, then enters the steam turbine 1 to decompress and apply work, the low-pressure steam discharged by the steam turbine 1 flows through the evaporator 5 to release heat and lower temperature, and then is divided into two paths, wherein the first path enters the compressor 2 to raise pressure and raise temperature, and the second path enters the condenser 4 to release heat and condense; the fuel provides high-temperature driving heat load through combustion, the cooling medium takes away low-temperature heat load through the condenser 4, and the air and the fuel gas take away low-temperature heat load through an inlet and outlet flow; the work output by the turbine 1 and the gas turbine 8 is provided for the compressor 2, the second compressor 7 and the external power, or the work output by the turbine 1 and the gas turbine 8 is provided for the compressor 2, the booster pump 3, the second compressor 7 and the external power, so as to form the gas-steam combined cycle power device.
The combined gas-steam cycle power plant shown in fig. 2 is implemented as follows:
(1) Structurally, the device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature heat regenerator; the condenser 4 is provided with a condensate pipeline which is communicated with the evaporator 5 through the booster pump 3, then the evaporator 5 is provided with a steam channel which is communicated with the high-temperature heat exchanger 6, the compressor 2 is provided with a steam channel which is communicated with the high-temperature heat exchanger 6, the high-temperature heat exchanger 6 is also provided with a steam channel which is communicated with the steam turbine 1 through the combustion chamber 9, and the steam turbine 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 5 and then is divided into two paths, namely a first path which is communicated with the compressor 2 and a second path which is communicated with the condenser 4; the outside is provided with an air channel which is communicated with the combustion chamber 9 through the second compressor 7 and the high-temperature heat regenerator 10, the outside is provided with a fuel channel which is communicated with the combustion chamber 9, the combustion chamber 9 is provided with a fuel gas channel which is communicated with the gas turbine 8, and the gas turbine 8 is provided with a fuel gas channel which is communicated with the outside through the high-temperature heat regenerator 10 and the high-temperature heat exchanger 6; the condenser 4 is also provided with a cooling medium passage communicated with the outside, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) In flow, compared with the gas-steam combined cycle power plant workflow shown in fig. 1, the difference is that: the external air enters the combustion chamber 9 after being boosted and warmed by the second compressor 7 and absorbed and warmed by the high-temperature regenerator 10; the gas produced by the combustion chamber 9 is depressurized and works through the gas turbine 8, gradually releases heat and lowers temperature through the high-temperature regenerator 10 and the high-temperature 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. 3 is implemented as follows:
(1) Structurally, the device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature heat regenerator; the condenser 4 is provided with a condensate pipeline which is communicated with the evaporator 5 through the booster pump 3, then the evaporator 5 is provided with a steam channel which is communicated with the high-temperature heat exchanger 6, the compressor 2 is provided with a steam channel which is communicated with the high-temperature heat exchanger 6, the high-temperature heat exchanger 6 is also provided with a steam channel which is communicated with the steam turbine 1 through the combustion chamber 9, and the steam turbine 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 5 and then is divided into two paths, namely a first path which is communicated with the compressor 2 and a second path which is communicated with the condenser 4; the outside is provided with an air channel which is communicated with the combustion chamber 9 through the second compressor 7 and the high-temperature heat regenerator 10, the outside is provided with a fuel channel which is communicated with the combustion chamber 9, the combustion chamber 9 is provided with a fuel channel which is communicated with the gas turbine 8, the gas turbine 8 is provided with a fuel channel which is communicated with the outside through the high-temperature heat regenerator 10, and the gas turbine 8 is provided with a fuel channel which is communicated with the outside through the high-temperature heat exchanger 6; the condenser 4 is also provided with a cooling medium passage communicated with the outside, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) In flow, compared with the gas-steam combined cycle power plant workflow shown in fig. 1, the difference is that: the external air enters the combustion chamber 9 after being boosted and warmed by the second compressor 7 and absorbed and warmed by the high-temperature regenerator 10; the gas produced by the combustion chamber 9 enters the gas turbine 8 to be depressurized and work to a certain extent, flows through the high-temperature regenerator 10 to release heat and cool down, and then enters the gas turbine 8 to be depressurized and work continuously; the gas discharged by the gas turbine 8 flows through the high-temperature heat exchanger 6 to release heat and cool, and then is discharged to the outside to form the gas-steam combined cycle power plant.
The combined gas-steam cycle power plant shown in fig. 4 is implemented as follows:
(1) Structurally, the device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature heat regenerator; the condenser 4 is provided with a condensate pipeline which is communicated with the evaporator 5 through the booster pump 3, then the evaporator 5 is provided with a steam channel which is communicated with the high-temperature heat exchanger 6, the compressor 2 is provided with a steam channel which is communicated with the high-temperature heat exchanger 6, the high-temperature heat exchanger 6 is also provided with a steam channel which is communicated with the steam turbine 1 through the combustion chamber 9, and the steam turbine 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 5 and then is divided into two paths, namely a first path which is communicated with the compressor 2 and a second path which is communicated with the condenser 4; after the air channel is communicated with the second compressor 7, the second compressor 7 is further communicated with the second compressor through a high-temperature heat regenerator 10, the second compressor 7 is further communicated with a combustion chamber 9, the outside is further communicated with the combustion chamber 9 through a fuel channel, the combustion chamber 9 is further communicated with a gas turbine 8, and the gas turbine 8 is further communicated with the outside through the high-temperature heat regenerator 10 and the high-temperature heat exchanger 6; the condenser 4 is also provided with a cooling medium passage communicated with the outside, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) In flow, compared with the gas-steam combined cycle power plant workflow shown in fig. 1, the difference is that: the external air enters the second compressor 7 to be boosted and heated to a certain degree, then flows through the high-temperature heat regenerator 10 to absorb heat and heat, then enters the second compressor 7 to be boosted and heated continuously, and the air discharged by the second compressor 7 enters the combustion chamber 9; the gas produced by the combustion chamber 9 is depressurized and works through the gas turbine 8, gradually releases heat and lowers temperature through the high-temperature regenerator 10 and the high-temperature 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. 5 is implemented as follows:
(1) Structurally, the device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature heat regenerator; the condenser 4 is provided with a condensate pipeline which is communicated with the evaporator 5 through the booster pump 3, then the evaporator 5 is provided with a steam channel which is communicated with the high-temperature heat exchanger 6, the compressor 2 is provided with a steam channel which is communicated with the high-temperature heat exchanger 6, the high-temperature heat exchanger 6 is also provided with a steam channel which is communicated with the steam turbine 1 through the combustion chamber 9, and the steam turbine 1 is also provided with a low-pressure steam channel which is communicated with the evaporator 5 and then is divided into two paths, namely a first path which is communicated with the compressor 2 and a second path which is communicated with the condenser 4; the outside has air passage and second compressor 7 after communicating, the second compressor 7 has air passage and self-communication of high-temperature regenerator 10 again, the second compressor 7 has air passage and combustion chamber 9 to communicate, the outside has fuel passage and combustion chamber 9 to communicate, the combustion chamber 9 has gas passage and gas turbine 8 after communicating, the gas turbine 8 has gas passage and self-communication of high-temperature regenerator 10 again, the gas turbine 8 has gas passage and outside to communicate through the high-temperature heat exchanger 6; the condenser 4 is also provided with a cooling medium passage communicated with the outside, the steam turbine 1 is connected with the compressor 2 and transmits power, and the gas turbine 8 is connected with the second compressor 7 and transmits power.
(2) In flow, compared with the gas-steam combined cycle power plant workflow shown in fig. 1, the difference is that: the external air enters the second compressor 7 to be boosted and heated to a certain degree, then flows through the high-temperature heat regenerator 10 to absorb heat and heat, then enters the second compressor 7 to be boosted and heated continuously, and the air discharged by the second compressor 7 enters the combustion chamber 9; the gas produced by the combustion chamber 9 enters the gas turbine 8 to be depressurized and work to a certain extent, flows through the high-temperature regenerator 10 to release heat and cool down, and then enters the gas turbine 8 to be depressurized and work continuously; the gas discharged by the gas turbine 8 flows through the high-temperature heat exchanger 6 to release heat and cool, and then is discharged to the outside to form the gas-steam combined cycle power plant.
The combined gas-steam cycle power plant shown in fig. 6 is implemented as follows:
in the gas-steam combined cycle power plant shown in fig. 1, a gas channel is additionally arranged on the evaporator 5 and communicated with the outside; the gas discharged by the gas turbine 8 flows through the high-temperature heat exchanger 6 and the evaporator 5 to gradually release heat and cool, and then is discharged to the outside; the condensate of the condenser 4 is boosted by the booster pump 3 and then enters the evaporator 5, and simultaneously absorbs the low-pressure steam from the steam turbine 1 and the heat in the fuel gas discharged from the high-temperature heat exchanger 6, and is heated, evaporated and superheated, and then is supplied to the high-temperature heat exchanger 6 to form the fuel gas-steam combined cycle power plant.
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 device shown in fig. 1, a second booster pump and a low-temperature heat regenerator are added, a condensate pipe of the condenser 4 is communicated with the booster pump 3, the condensate pipe of the condenser 4 is communicated with the low-temperature heat regenerator 12 through the second booster pump 11, a steam extraction channel is additionally arranged on the compressor 2 and is communicated with the low-temperature heat regenerator 12, and the condensate pipe of the low-temperature heat regenerator 12 is communicated with the booster pump 3.
(2) In flow, compared with the gas-steam combined cycle power plant workflow shown in fig. 1, the difference is that: the condensate discharged by the condenser 4 flows through the second booster pump 11 to be boosted and then enters the low-temperature heat regenerator 12 to be mixed with the extracted steam from the compressor 2, absorbs heat and heats up, and the extracted steam is released into condensate; the condensate of the low-temperature heat regenerator 12 is boosted by the booster pump 3, is subjected to heat absorption and temperature rise, vaporization and overheating by the evaporator 5, then enters the high-temperature heat exchanger 6 to absorb heat and temperature rise, and the steam discharged by the compressor 2 enters the high-temperature heat exchanger 6 to absorb heat and temperature rise; the steam discharged by the high-temperature heat exchanger 6 flows through the combustion chamber 9 to absorb heat and raise temperature, then enters the steam turbine 1 to decompress and apply work, the low-pressure steam discharged by the steam turbine 1 flows through the evaporator 5 to release heat and reduce temperature, and then is divided into two paths, namely, the first path enters the compressor 2, and the second path enters the condenser 4 to release heat and condense; the low-pressure steam entering the compressor 2 is boosted and heated to a certain degree and then is divided into two paths, wherein the first path is provided for the low-temperature heat regenerator 12, and the second path is continuously boosted and heated and then enters the high-temperature heat exchanger 6 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) In the structure, in the gas-steam combined cycle power plant shown in fig. 1, the low-pressure steam channel of the steam turbine 1 is communicated with the evaporator 5, so that the intermediate steam channel of the steam turbine 1 is communicated with the gas turbine through the high-temperature heat exchanger 6, and then the low-pressure steam channel of the steam turbine 1 is communicated with the evaporator 5.
(2) In flow, compared with the gas-steam combined cycle power plant workflow shown in fig. 1, the difference is that: the steam produced by the combustion chamber 9 enters the steam turbine 1 to be depressurized and work to a certain extent, then flows through the high-temperature heat exchanger 6 to release heat and cool down, and then enters the steam turbine 1 to be depressurized and work continuously; the low-pressure steam discharged by the steam turbine 1 flows through the evaporator 5 to release heat and cool, and then enters the compressor 2 to raise the pressure and heat and enters the condenser 4 to release heat and condense respectively, so as to form the gas-steam combined cycle power device.
The combined gas-steam cycle power plant shown in fig. 9 is implemented as follows:
(1) In the structure, in the gas-steam combined cycle power plant shown in fig. 1, a new evaporator and a new diffusion pipe are added, the condensate pipeline of the booster pump 3 is communicated with the evaporator 5 through the new evaporator A and the new diffusion pipe B, the low-pressure steam channel of the steam turbine 1 is communicated with the evaporator 5 and then divided into two paths, and the low-pressure steam channel of the steam turbine 1 is communicated with the new evaporator A through the evaporator 5 and then divided into two paths.
(2) In flow, compared with the gas-steam combined cycle power plant workflow shown in fig. 1, the difference is that: condensate of the condenser 4 flows through the booster pump 3, then enters the newly added evaporator A, absorbs heat, heats up, partially vaporizes and increases speed, flows through the newly added diffuser pipe B, decreases speed and increases pressure, and then enters the evaporator 5 to absorb heat and vaporize; the low-pressure steam discharged by the steam turbine 1 is gradually released and cooled through the evaporator 5 and the newly added evaporator A, and then respectively enters the compressor 2 for boosting and heating and enters the condenser 4 for releasing heat and condensing, so that the gas-steam combined cycle power device is formed.
The combined gas-steam cycle power plant shown in fig. 10 is implemented as follows:
(1) In the gas-steam combined cycle power plant shown in fig. 1, the low-pressure steam passage of the steam turbine 1 is communicated with the evaporator 5, and the low-pressure steam passage of the steam turbine 1 is communicated with the evaporator 5 through the high-temperature heat exchanger 6.
(2) In flow, compared with the gas-steam combined cycle power plant workflow shown in fig. 1, the difference is that: the low-pressure steam discharged by the steam turbine 1 is gradually released and cooled through the high-temperature heat exchanger 6 and the evaporator 5, and then respectively enters the compressor 2 for boosting and heating and enters the condenser 4 for releasing heat and condensing, so that the gas-steam combined cycle power plant is formed.
The combined gas-steam cycle power plant shown in fig. 11 is implemented as follows:
(1) Structurally, in the gas-steam combined cycle power plant shown in fig. 1, an expansion speed increaser 13 is added to replace a steam turbine 1, a dual-energy compressor 14 is added to replace a compressor 2, and a diffuser pipe 15 is added to replace a booster pump 3; the expansion speed increaser 13 is connected with a dual-energy compressor 14 and transmits power.
(2) In flow, compared with the gas-steam combined cycle power plant workflow shown in fig. 1, the difference is that: the condensate of the condenser 4 is subjected to speed reduction and pressure increase through a diffuser pipe 15, is subjected to heat absorption and temperature rise, vaporization and overheating through an evaporator 5, then enters a high-temperature heat exchanger 6 to absorb heat and temperature rise, and the steam discharged by the dual-energy compressor 14 enters the high-temperature heat exchanger 6 to absorb heat and temperature rise; the steam discharged by the high-temperature heat exchanger 6 flows through the combustion chamber 9 to absorb heat and raise temperature, then enters the expansion speed increaser 13 to reduce pressure and do work and increase speed, the low-pressure steam discharged by the expansion speed increaser 13 flows through the evaporator 5 to release heat and reduce temperature, then is divided into two paths, wherein the first path enters the dual-energy compressor 14 to raise pressure and raise temperature and reduce speed, and the second path enters the condenser 4 to release heat and condense; the work output by the gas turbine 8 and the expansion speed increaser 13 is provided for the second compressor 7, the dual-energy compressor 14 and the 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) Effectively reduces the heat absorption temperature difference and the heat release temperature difference, has small temperature difference loss and high heat changing work efficiency.
(2) The two paths of circulating working media (fuel gas and water vapor) jointly acquire high-temperature heat load, and the two paths of circulating working media (fuel gas and water vapor) respectively provide heat load for bottom circulation, so that the fuel gas load/flow is obviously reduced.
(3) On the premise that the load scale of two core components (a steam turbine and a gas turbine) is basically unchanged, the air flow of the second compressor is greatly reduced (the excess air coefficient is obviously reduced), so that the manufacturing cost of the device is reduced.
(4) The working load of the second compressor is obviously reduced, and accordingly, the energy loss of the second compressor is reduced, and the heat-changing work efficiency of the system is improved.
(5) The working load of the second compressor is obviously reduced, so that the boosting ratio of the second compressor is improved, and the heat absorption temperature and the heat change work efficiency are improved; or on the premise of not changing the working load of the second compressor, the high-temperature load of the combustion chamber is increased, and the high-load power device is constructed.
(6) Simple structure, reasonable flow and rich scheme, and is beneficial to reducing the manufacturing cost of the device and expanding the application range of the technology.
Claims (12)
1. The gas-steam combined cycle power plant mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine and a combustion chamber; the condenser (4) is provided with a condensate pipeline which is communicated with the evaporator (5) through a booster pump (3), then the evaporator (5) is further provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the compressor (2) is provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the steam turbine (1) through a combustion chamber (9), and the steam turbine (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (5) and then is divided into two paths, namely a first path which is communicated with the compressor (2) and a second path which is communicated with the condenser (4); the outside is provided with an air channel which is communicated with the combustion chamber (9) through the second compressor (7), the outside is provided with a fuel channel which is communicated with the combustion chamber (9), the combustion chamber (9) is provided with a gas channel which is communicated with the gas turbine (8), and the gas turbine (8) is provided with a gas channel which is communicated with the outside through the high-temperature heat exchanger (6); the condenser (4) is also communicated with the outside through a cooling medium channel, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power to form the gas-steam combined cycle power device.
2. The gas-steam combined cycle power device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature regenerator; the condenser (4) is provided with a condensate pipeline which is communicated with the evaporator (5) through a booster pump (3), then the evaporator (5) is further provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the compressor (2) is provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the steam turbine (1) through a combustion chamber (9), and the steam turbine (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (5) and then is divided into two paths, namely a first path which is communicated with the compressor (2) and a second path which is communicated with the condenser (4); the outside is provided with an air channel which is communicated with the combustion chamber (9) through the second compressor (7) and the high-temperature heat regenerator (10), the outside is provided with a fuel channel which is communicated with the combustion chamber (9), the combustion chamber (9) is provided with a gas channel which is communicated with the gas turbine (8), and the gas turbine (8) is provided with a gas channel which is communicated with the outside through the high-temperature heat regenerator (10) and the high-temperature heat exchanger (6); the condenser (4) is also communicated with the outside through a cooling medium channel, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power to form the gas-steam combined cycle power device.
3. The gas-steam combined cycle power device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature regenerator; the condenser (4) is provided with a condensate pipeline which is communicated with the evaporator (5) through a booster pump (3), then the evaporator (5) is further provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the compressor (2) is provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the steam turbine (1) through a combustion chamber (9), and the steam turbine (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (5) and then is divided into two paths, namely a first path which is communicated with the compressor (2) and a second path which is communicated with the condenser (4); the outside is provided with an air channel which is communicated with a combustion chamber (9) through a second compressor (7) and a high-temperature heat regenerator (10), the outside is provided with a fuel channel which is communicated with the combustion chamber (9), the combustion chamber (9) is provided with a gas channel which is communicated with a gas turbine (8), the gas turbine (8) is provided with a gas channel which is communicated with the gas turbine through the high-temperature heat regenerator (10), and the gas turbine (8) is provided with a gas channel which is communicated with the outside through a high-temperature heat exchanger (6); the condenser (4) is also communicated with the outside through a cooling medium channel, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power to form the gas-steam combined cycle power device.
4. The gas-steam combined cycle power device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature regenerator; the condenser (4) is provided with a condensate pipeline which is communicated with the evaporator (5) through a booster pump (3), then the evaporator (5) is further provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the compressor (2) is provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the steam turbine (1) through a combustion chamber (9), and the steam turbine (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (5) and then is divided into two paths, namely a first path which is communicated with the compressor (2) and a second path which is communicated with the condenser (4); after the air channel is communicated with the second compressor (7), the second compressor (7) is further communicated with the second compressor through the high-temperature heat regenerator (10), the second compressor (7) is further communicated with the combustion chamber (9), the external fuel channel is further communicated with the combustion chamber (9), the combustion chamber (9) is further communicated with the gas turbine (8), and the gas turbine (8) is further communicated with the external through the high-temperature heat regenerator (10) and the high-temperature heat exchanger (6); the condenser (4) is also communicated with the outside through a cooling medium channel, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power to form the gas-steam combined cycle power device.
5. The gas-steam combined cycle power device mainly comprises a steam turbine, a compressor, a booster pump, a condenser, an evaporator, a high-temperature heat exchanger, a second compressor, a gas turbine, a combustion chamber and a high-temperature regenerator; the condenser (4) is provided with a condensate pipeline which is communicated with the evaporator (5) through a booster pump (3), then the evaporator (5) is further provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the compressor (2) is provided with a steam channel which is communicated with the high-temperature heat exchanger (6), the high-temperature heat exchanger (6) is also provided with a steam channel which is communicated with the steam turbine (1) through a combustion chamber (9), and the steam turbine (1) is also provided with a low-pressure steam channel which is communicated with the evaporator (5) and then is divided into two paths, namely a first path which is communicated with the compressor (2) and a second path which is communicated with the condenser (4); the outside is provided with an air channel which is communicated with the second compressor (7), then the second compressor (7) is further provided with an air channel which is communicated with the second compressor through the high-temperature heat regenerator (10), the second compressor (7) is further provided with an air channel which is communicated with the combustion chamber (9), the outside is further provided with a fuel channel which is communicated with the combustion chamber (9), the combustion chamber (9) is further provided with a fuel gas channel which is communicated with the gas turbine (8), then the gas turbine (8) is further provided with a fuel gas channel which is communicated with the second compressor through the high-temperature heat regenerator (10), and the gas turbine (8) is further provided with a fuel gas channel which is communicated with the outside through the high-temperature heat exchanger (6); the condenser (4) is also communicated with the outside through a cooling medium channel, the steam turbine (1) is connected with the compressor (2) and transmits power, and the gas turbine (8) is connected with the second compressor (7) and transmits power to form the gas-steam combined cycle power device.
6. The gas-steam combined cycle power plant is characterized in that in any one of the gas-steam combined cycle power plants in claims 1-5, a gas channel is additionally arranged on the evaporator (5) and communicated with the outside to form the gas-steam combined cycle power plant.
7. A gas-steam combined cycle power device is formed by adding a second booster pump and a low-temperature heat regenerator in any one of the gas-steam combined cycle power devices in claims 1-6, adjusting the communication of a condensate pipe of a condenser (4) and the booster pump (3) to the communication of the condensate pipe of the condenser (4) and the low-temperature heat regenerator (12) through a second booster pump (11), adding a steam extraction channel in the compressor (2) and the low-temperature heat regenerator (12), and communicating the condensate pipe of the low-temperature heat regenerator (12) and the booster pump (3).
8. In the gas-steam combined cycle power plant, in any one of claims 1-7, the communication between the low-pressure steam channel of the steam turbine (1) and the evaporator (5) is adjusted to be that the middle steam channel of the steam turbine (1) is communicated with the gas-steam combined cycle power plant through the high-temperature heat exchanger (6), and then the low-pressure steam channel of the steam turbine (1) is communicated with the evaporator (5) to form the gas-steam combined cycle power plant.
9. In the gas-steam combined cycle power plant, a new evaporator and a new diffusion pipe are added in any one of the gas-steam combined cycle power plant of claims 1-8, a condensate pipe of a booster pump (3) is communicated with an evaporator (5) and is adjusted to be communicated with the evaporator (5) through the new evaporator (A) and the new diffusion pipe (B), a low-pressure steam channel of a turbine (1) is communicated with the evaporator (5) and is divided into two paths, and the low-pressure steam channel of the turbine (1) is communicated with the new evaporator (A) through the evaporator (5) and is divided into two paths, and the new evaporator (A) or the gas channel is communicated with the outside, so that the gas-steam combined cycle power plant is formed.
10. In the fuel gas-steam combined cycle power plant, in any one of the fuel gas-steam combined cycle power plants of claims 1-7, the low-pressure steam passage of the steam turbine (1) is communicated with the evaporator (5) and is adjusted to be communicated with the evaporator (5) through the high-temperature heat exchanger (6), so that the fuel gas-steam combined cycle power plant is formed.
11. A gas-steam combined cycle power plant is characterized in that in any one of the gas-steam combined cycle power plants in claim 10, a new evaporator and a new diffusion pipe are added, a condensate pipe arranged on a booster pump (3) is communicated with an evaporator (5) and is adjusted to be communicated with the evaporator (5) through the new evaporator (A) and the new diffusion pipe (B), a low-pressure steam channel arranged on a steam turbine (1) is communicated with the evaporator (5) through a high-temperature heat exchanger (6), and then is divided into two paths, and the low-pressure steam channel arranged on the steam turbine (1) is communicated with the new evaporator (A) through the high-temperature heat exchanger (6) and the evaporator (5), and then the new evaporator (A) or the gas channel is communicated with the outside, so that the gas-steam combined cycle power plant is formed.
12. In the fuel gas-steam combined cycle power plant, an expansion speed increaser (13) is added to replace a steam turbine (1), a dual-energy compressor (14) is added to replace a compressor (2), and a diffuser pipe (15) is added to replace a booster pump (3); the expansion speed increaser (13) is connected with the dual-energy compressor (14) and transmits power to form the gas-steam combined cycle power device.
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