CN112879161A - Temperature control heating type solar and gas combined cycle power generation system and method thereof - Google Patents
Temperature control heating type solar and gas combined cycle power generation system and method thereof Download PDFInfo
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- CN112879161A CN112879161A CN202110129956.1A CN202110129956A CN112879161A CN 112879161 A CN112879161 A CN 112879161A CN 202110129956 A CN202110129956 A CN 202110129956A CN 112879161 A CN112879161 A CN 112879161A
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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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
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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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/34—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of extraction or non-condensing type; Use of steam for feed-water heating
- F01K7/44—Use of steam for feed-water heating and another purpose
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- 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
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
- F03G6/064—Devices for producing mechanical power from solar energy with solar energy concentrating means having a gas turbine cycle, i.e. compressor and gas turbine combination
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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]
Abstract
The embodiment of the invention discloses a temperature control heating type solar gas combined cycle power generation system and a method thereof. In order to increase the steam output of the outlet of the solar heat collector, a method for extracting steam from a superheated steam pipeline or a steam turbine to heat the inlet water of the solar heat collector is provided, so that the optimal steam output is achieved, and the energy utilization rate of the combined cycle is improved. The water inlet proportion entering the solar heat collector and the steam extraction quantity of the superheated steam pipeline or the steam turbine are automatically adjusted according to the intensity of solar radiation and the exhaust gas temperature, the temperature of the inlet water of the solar heat collector is ensured to reach the temperature value corresponding to the temperature difference of the design approach point of the solar heat collector, the cascade complementation and the comprehensive utilization of energy are realized, and the operation efficiency of the solar combined cycle system is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of power generation equipment, in particular to a temperature control heating type solar gas combined cycle power generation system and a method thereof.
Background
Energy and environmental problems are always hot problems in the world at present, and with continuous progress of scientific technology and improvement of living standard of people, the demand of modern society on electric energy is higher and higher, and the environmental problems are more and more important. The gas-steam combined cycle power plant using clean energy such as natural gas has the advantages of quick start, high power supply efficiency, small occupied area, short construction period of the power station, low investment, high reliability, small environmental pollution, small unit noise and the like, the proportion is gradually increased in the power industry of China, the gas-steam combined cycle power plant becomes a main unit of big cities such as wide and deep in the north, meanwhile, solar energy is used as clean renewable energy, powerful supplement can be provided for non-renewable energy such as coal, petroleum, natural gas and the like, the solar energy can be coupled in a gas-steam combined cycle (GTCC) system to form a solar gas-steam combined cycle (ISCC) system based on the principle of energy cross-over and gradient utilization, the water supply is realized by using a solar heating part, the system performance is influenced differently by different coupling modes, and how to couple the solar energy in the gas-steam combined cycle to obtain higher combined cycle operation efficiency becomes the combined cycle operation efficiency Necessary problems of research are solved, and the method has great practical significance for sustainable development strategies in China.
Disclosure of Invention
Therefore, the embodiment of the invention provides a temperature control heating type solar gas combined cycle power generation system and a method thereof, so as to obtain higher combined cycle operation efficiency.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
according to a first aspect of the embodiments of the present invention, a temperature-controlled heating type solar gas combined cycle power generation system is provided, the system includes a gas turbine subsystem, a steam turbine subsystem, a trough type solar heat collection subsystem and a waste heat boiler subsystem;
the gas turbine subsystem comprises a gas compressor, a combustion chamber, a gas turbine and a generator which are sequentially connected, and the outlet of the gas turbine is connected with the waste heat boiler subsystem through an exhaust pipeline so as to recycle the exhaust gas of the gas turbine; the steam turbine subsystem comprises a high-pressure cylinder, a low-pressure cylinder and a generator which are sequentially connected;
the trough type solar heat collection subsystem comprises a solar heat collector, an inlet water heater, a first high-pressure water pump and a first mixer, wherein the inlet of the solar heat collector is connected with the outlet of the water inlet heater, the inlet of the inlet water heater is connected with the outlet of the first high-pressure water pump, and the inlet of the first high-pressure water pump is connected with the outlet of the first mixer;
the waste heat boiler subsystem comprises a condenser, a low-pressure water pump, a first flow divider, a second mixer, a condensed water preheater, a second flow divider and a high-pressure superheater, the condenser is connected with a low-pressure cylinder, the low-pressure water pump is connected with the condenser, an inlet of the first flow divider is connected with the low-pressure water pump, a first path outlet of the first flow divider is connected with a first path inlet of the second mixer, a second path inlet of the second mixer is connected with a heat source medium outlet of an inlet water heater, an outlet of the second mixer is connected with an inlet of the condensed water preheater, an outlet of the condensed water preheater is connected with an inlet of the second flow divider, a first path outlet of the second flow divider is connected with a first path inlet of the first mixer, a second path outlet of the first flow divider is connected with a second path inlet of the first mixer, and an outlet of the solar collector is connected with an inlet of the, and the outlet of the high-pressure superheater is connected with the high-pressure cylinder.
Furthermore, the waste heat boiler subsystem further comprises a second high-pressure water pump, a high-pressure economizer, a high-pressure evaporator, a high-pressure steam drum and a third mixer, wherein a second path of outlet of the second flow divider is connected with an inlet of the second high-pressure water pump, an outlet of the second high-pressure water pump is connected with an inlet of the high-pressure economizer, an outlet of the high-pressure economizer is connected with inlets of the high-pressure steam drum and the high-pressure evaporator, an outlet of the high-pressure evaporator is connected with a first path of inlet of the third mixer, an outlet of the solar collector is connected with a second path of inlet of the third mixer, and an outlet of the third mixer is connected with an inlet of the high-pressure superheater.
Furthermore, the waste heat boiler subsystem further comprises a low-pressure evaporator, a low-pressure steam pocket and a low-pressure superheater, wherein a third path of outlet of the second flow divider is connected with inlets of the low-pressure steam pocket and the low-pressure evaporator, an outlet of the low-pressure steam pocket is connected with an inlet of the low-pressure superheater, and an outlet of the low-pressure superheater is connected with the low-pressure cylinder.
Further, the heat source for the inlet water heater is derived from extraction in the superheated steam line of the steam turbine subsystem or system.
Furthermore, a heat source inlet of the inlet water heater is connected with a flow controller, the flow controller is used for controlling the steam extraction amount of a steam turbine subsystem or a system superheated steam pipeline, and the steam extraction amount is adjusted in real time according to the inlet water parameter of the inlet water heater, so that the outlet temperature of the inlet water heater is maintained to a designed value.
Furthermore, the waste heat boiler subsystem further comprises a temperature controller, a second path of outlet of the first flow divider is connected with an inlet of the temperature controller, an outlet of the temperature controller is connected with a second path of inlet of the first mixer, the temperature controller controls the flow of the first flow divider flowing out according to the smoke exhaust temperature of the waste heat boiler subsystem, when the smoke exhaust temperature of the waste heat boiler subsystem is higher than a design value, the flow of outlet water entering the condensate water preheater is increased, and when the smoke exhaust temperature of the waste heat boiler subsystem is lower than the design value, the flow of outlet water entering the condensate water preheater is reduced.
According to a second aspect of the embodiments of the present invention, there is provided a method for operating a temperature controlled heating type solar gas combined cycle power generation system, the method including:
the gas compressor inputs compressed air into the combustion chamber through a pipeline, the input air and fuel are fully mixed and then are combusted to generate high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters the gas turbine through the pipeline to do work and drive the generator to generate electricity, and exhaust gas at the outlet of the gas turbine enters the waste heat boiler subsystem for heating working medium water to be recycled;
steam which does work through a high-pressure cylinder and a low-pressure cylinder of a steam turbine subsystem enters a condenser through a pipeline to be condensed into condensed water, the generated condensed water enters a low-pressure water pump through the pipeline to be boosted and then enters a first flow divider to be divided into two paths, the first path of condensed water enters a second mixer and then is mixed with fluid at a heat source outlet of an inlet water heater, the second path of condensed water enters the first mixer, and outlet water of the second mixer enters a condensed water preheater to be preheated and then enters the second flow divider to be divided;
the first path of working medium water separated by the second flow divider enters the first mixer and then is mixed with the second path of condensed water from the first flow divider, then the mixed feed water is conveyed to an inlet water heater for heating through a first high-pressure water pump, a heat source of the inlet water heater is from steam extraction in a steam turbine subsystem or a system superheated steam pipeline, working medium water in the inlet water heater is heated to a temperature value corresponding to the designed close point temperature difference of a solar heat collector by the steam extraction, the heat source enters a second mixer for mixing after the steam extraction and the heat release, the heated water in the inlet water heater enters an inlet of the solar heat collector, and the inlet water is heated to a high-pressure saturated steam state by solar energy, and then the steam is introduced into a high-pressure superheater for heating and then enters a high-pressure cylinder of a steam turbine subsystem for expansion and work application, and the steam which does work through a low-pressure cylinder is condensed through a condenser and then continues to the next cycle.
Further, the method further comprises:
and the second path of working medium water separated by the second flow divider enters a second high-pressure water pump to be pressurized and then flows into an inlet of the high-pressure economizer, the outlet water of the high-pressure economizer enters a high-pressure steam drum and an inlet of the high-pressure evaporator, the high-pressure saturated steam at the outlet of the high-pressure evaporator enters a third mixer to be mixed with the high-pressure saturated steam from the solar heat collector, and then enters a high-pressure superheater to be heated and then enters a high-pressure cylinder of the steam turbine subsystem to be expanded and do work.
Further, the method further comprises:
and the third path of working medium water separated by the second flow divider enters the inlets of the low-pressure steam drum and the low-pressure evaporator, and saturated steam at the outlet of the low-pressure steam drum enters the inlet of the low-pressure superheater and enters the low-pressure cylinder of the steam turbine to expand and do work after being heated by the low-pressure superheater.
The embodiment of the invention has the following advantages:
the temperature control heating type solar gas combined cycle power generation system and the method thereof provided by the embodiment of the invention comprise a gas turbine subsystem, a steam turbine subsystem, a groove type solar heat collection subsystem and a waste heat boiler subsystem, wherein the gas turbine subsystem is used as a main part for outputting work, and exhaust gas of the gas turbine subsystem is used as a main heat source of the waste heat boiler subsystem and is used for heating condensed water to a superheated steam state so as to improve the working capacity of steam; the waste heat boiler subsystem utilizes water as a circulating working medium, so that waste heat loss of the gas turbine subsystem caused by overlarge exhaust temperature is reduced; the groove type solar heat collector subsystem is used as an auxiliary heat source and used for heating partial feed water of the waste heat boiler to enable the partial feed water to reach a high-pressure saturated steam state, and the working capacity of the steam is improved; the inlet water heater and the solar heat collector are used for heating part of feed water of the waste heat boiler subsystem, working capacity of working media is increased, fuel consumption under unit power is reduced, energy is saved, pollutant emission is reduced, and economy of combined cycle is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
Fig. 1 is a schematic structural diagram of a temperature-controlled heating type solar-gas combined cycle power generation system provided in embodiment 1 of the present invention.
In the figure: 1. a compressor; 2. a combustion chamber; 3. a gas turbine; 4. a generator; 5. a condenser; 6. a low-pressure water pump; 7. a first splitter; 8. a second mixer; 9. a condensate preheater; 10. a second flow splitter; 11. a first mixer; 12. a first high pressure water pump; 13. an inlet water heater; 14. a solar heat collector; 15. a third mixer; 16. a second high pressure water pump; 17. a low pressure evaporator; 18. a low pressure steam drum; 19. a high-pressure economizer; 20. a low pressure superheater; 21. a high pressure evaporator; 22. a high pressure steam drum; 23. a high pressure superheater; 24. a high pressure cylinder; 25. a low pressure cylinder; 26. a temperature controller; 27. a flow controller.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment 1 of the invention provides a temperature-control heating type solar gas combined cycle power generation system, which comprises a gas turbine subsystem, a steam turbine subsystem, a groove type solar heat collection subsystem and a waste heat boiler subsystem as shown in fig. 1. The system comprises a groove type solar heat collecting subsystem, a steam turbine, a water heater, a steam turbine, a steam generator and a steam generator, wherein the groove type solar heat collecting subsystem is used as an auxiliary heat source and used for heating feed water of the inlet water heater to a high-pressure saturated steam state and increasing the flow; the gas turbine subsystem is used as a main component of output work, and exhaust gas of the gas turbine subsystem is used as a main heat source of the waste heat boiler subsystem and is used for heating condensed water; the waste heat boiler subsystem utilizes solar energy and the exhaust waste heat of the gas turbine, reduces waste heat loss caused by overhigh exhaust temperature of the gas turbine subsystem, and improves the efficiency of the combined cycle system.
The gas turbine subsystem comprises a gas compressor 1, a combustion chamber 2, a gas turbine 3 and a generator 4 which are sequentially connected, and the outlet of the gas turbine 3 is connected with the waste heat boiler subsystem through an exhaust pipeline so as to recycle the exhaust gas of the gas turbine. The steam turbine subsystem comprises a high-pressure cylinder 24, a low-pressure cylinder 25 and a generator 4 which are connected in sequence.
The trough type solar heat collecting subsystem comprises a solar heat collector 14, an inlet water heater 13, a first high-pressure water pump 12 and a first mixer 11, wherein the inlet of the solar heat collector 14 is connected with the outlet of the water inlet heater, the inlet of the inlet water heater 13 is connected with the outlet of the first high-pressure water pump 12, and the inlet of the first high-pressure water pump 12 is connected with the outlet of the first mixer 11.
The waste heat boiler subsystem comprises a condenser 5, a low-pressure water pump 6, a first flow divider 7, a second mixer 8, a condensed water preheater 9, a second flow divider 10 and a high-pressure superheater 23, wherein the condenser 5 is connected with a low-pressure cylinder 25, the low-pressure water pump 6 is connected with the condenser 5, an inlet of the first flow divider 7 is connected with the low-pressure water pump 6, a first path outlet of the first flow divider 7 is connected with a first path inlet of the second mixer 8, a second path inlet of the second mixer 8 is connected with a heat source medium outlet of an inlet water heater 13, an outlet of the second mixer 8 is connected with an inlet of the condensed water preheater 9, an outlet of the condensed water preheater 9 is connected with an inlet of the second flow divider 10, a first path outlet of the second flow divider 10 is connected with a first path inlet of a first path mixer 11, a second path outlet of the first flow divider 7 is connected with a second path inlet of the first mixer 11, an, the outlet of the high-pressure superheater 23 is connected to a high-pressure cylinder 24.
In this embodiment, the waste heat boiler subsystem further includes a second high-pressure water pump 16, a second high-pressure water pump 19, a high-pressure evaporator 21, a high-pressure steam drum 22 and a third mixer 15, a second path of outlet of the second flow divider 10 is connected to an inlet of the second high-pressure water pump 16, an outlet of the second high-pressure water pump 16 is connected to an inlet of the second high-pressure water pump 19, an outlet of the second high-pressure water pump 19 is connected to inlets of the high-pressure steam drum 22 and the high-pressure evaporator 21, an outlet of the high-pressure evaporator 21 is connected to a first path of inlet of the third mixer 15, an outlet of the solar heat collector 14 is connected to a second path of inlet of the third mixer 15, and an outlet of the third mixer 15 is connected to an inlet of the high.
In this embodiment, the waste heat boiler subsystem further includes a low-pressure evaporator 17, a low-pressure steam drum 18 and a low-pressure superheater 20, a third path of outlet of the second flow divider 10 is connected to inlets of the low-pressure steam drum 18 and the low-pressure evaporator 17, an outlet of the low-pressure steam drum 18 is connected to an inlet of the low-pressure superheater 20, and an outlet of the low-pressure superheater 20 is connected to the low-pressure cylinder 25.
In this embodiment, the heat source of the inlet water heater 13 is extracted from the steam in the turbine subsystem or the superheated steam pipeline of the system, and all the devices or pipelines capable of generating superheated steam in the whole system can be used as the heat source of the extracted steam of the inlet water heater 13. The heat source inlet of the inlet water heater 13 is connected with a flow controller 27, the flow controller 27 is used for controlling the steam extraction amount of a steam turbine subsystem or a system superheated steam pipeline, and the steam extraction amount is adjusted in real time according to the inlet water parameter of the inlet water heater 13, so that the outlet temperature of the inlet water heater 13 is maintained to a designed value.
In this embodiment, the exhaust-heat boiler subsystem further includes a temperature controller 26, the second way outlet of the first shunt 7 is connected to the inlet of the temperature controller 26, the outlet of the temperature controller 26 is connected to the second way inlet of the first mixer 11, the temperature controller 26 controls the flow rate of the first shunt 7 flowing out according to the smoke exhaust temperature of the exhaust-heat boiler subsystem, when the smoke exhaust temperature of the exhaust-heat boiler subsystem is higher than the design value, the outlet water flow rate of the condensed water preheater 9 is increased, and when the smoke exhaust temperature of the exhaust-heat boiler subsystem is lower than the design value, the outlet water flow rate of the condensed water preheater 9 is reduced.
The operation method of the temperature control heating type solar gas combined cycle power generation system in the embodiment 1 of the invention comprises the following steps:
the gas compressor 1 inputs compressed air into the combustion chamber 2 through a pipeline, the input air and fuel are fully mixed and then are combusted to generate high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters the gas turbine 3 through the pipeline to do work and drive the generator 4 to generate electricity, and exhaust gas at the outlet of the gas turbine 3 enters the waste heat boiler subsystem for heating working medium water to be recycled;
steam which does work through a high-pressure cylinder 24 and a low-pressure cylinder 25 of a steam turbine subsystem enters a condenser 5 through a pipeline to be condensed into condensed water, the generated condensed water enters a low-pressure water pump 6 through the pipeline to be boosted and then enters a first flow divider 7 to be divided into two paths, the first path of condensed water enters a second mixer 8 and then is mixed with fluid at a heat source outlet of an inlet water heater 13, the second path of condensed water enters a first mixer 11, and outlet water of the second mixer 8 enters a condensed water preheater 9 to be preheated and then enters a second flow divider 10 to be divided;
the first path of working medium water separated by the second flow divider 10 enters the first mixer 11 and then is mixed with the second path of condensed water from the first flow divider 7, then the mixed feed water is delivered to an inlet water heater 13 for heating through a first high-pressure water pump 12, the heat source of the inlet water heater 13 comes from steam extraction in a steam turbine subsystem or a system superheated steam pipeline, working medium water in the inlet water heater 13 is heated to a temperature value corresponding to the designed close point temperature difference of a solar heat collector 14 by the steam extraction, the heat source extracts steam and releases heat and then enters a second mixer 8 for mixing, the heated water in the inlet water heater 13 enters an inlet of the solar heat collector, and the inlet water is heated to a high-pressure saturated steam state by solar energy, then the steam is introduced into a high-pressure superheater 23 for heating and then enters a high-pressure cylinder 24 of the steam turbine subsystem for expansion and work application, and the steam which is subjected to work application by a low-pressure cylinder 25 is condensed by a condenser 5 and then continues to the next cycle.
Further, the method further comprises:
the second path of working medium water separated by the second flow divider 10 enters a second high-pressure water pump 16 to be pressurized and then flows into an inlet of the second high-pressure water pump 19, outlet water of the second high-pressure water pump 19 enters a high-pressure steam drum 22 and an inlet of a high-pressure evaporator 21, high-pressure saturated steam at an outlet of the high-pressure evaporator 21 enters a third mixer 15 and then is mixed with high-pressure saturated steam from a solar heat collector, and then enters a high-pressure superheater 23 to be heated and then enters a high-pressure cylinder 24 of a steam turbine subsystem to be expanded and do work.
Further, the method further comprises:
and the third path of working medium water separated by the second flow divider 10 enters the inlets of the low-pressure steam drum 18 and the low-pressure evaporator 17, and the saturated steam at the outlet of the low-pressure steam drum 18 enters the inlet of the low-pressure superheater 20, is heated by the low-pressure superheater 20, and then enters the steam turbine low-pressure cylinder 25 for expansion and work.
According to the temperature control heating type solar gas combined cycle power generation system and the method thereof provided by the embodiment of the invention, a gas turbine subsystem is used as a main part for outputting work, and exhaust gas of the gas turbine subsystem is used as a main heat source of a waste heat boiler subsystem and is used for heating condensed water to a superheated steam state so as to improve the working capacity of steam; the waste heat boiler subsystem utilizes water as a circulating working medium, so that waste heat loss of the gas turbine subsystem caused by overlarge exhaust temperature is reduced; the groove type solar heat collector subsystem is used as an auxiliary heat source and used for heating partial feed water of the waste heat boiler to enable the partial feed water to reach a high-pressure saturated steam state, and the working capacity of the steam is improved; the inlet water heater heats the solar inlet water by using the extracted steam of the steam turbine or the superheated steam pipeline, so that the work-doing capacity and the comprehensive energy utilization efficiency of the combined cycle are improved; the temperature controller and the flow controller are utilized to control the flow distribution of the working medium at the outlets of different devices, and the high-efficiency operation of the combined cycle is maintained; the inlet water heater and the solar heat collector are used for heating part of feed water of the waste heat boiler subsystem, working capacity of working media is increased, fuel consumption under unit power is reduced, energy is saved, pollutant emission is reduced, and economy of combined cycle is improved.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. A temperature control heating type solar gas combined cycle power generation system is characterized by comprising a gas turbine subsystem, a steam turbine subsystem, a groove type solar heat collection subsystem and a waste heat boiler subsystem;
the gas turbine subsystem comprises a gas compressor, a combustion chamber, a gas turbine and a generator which are sequentially connected, and the outlet of the gas turbine is connected with the waste heat boiler subsystem through an exhaust pipeline so as to recycle the exhaust gas of the gas turbine; the steam turbine subsystem comprises a high-pressure cylinder, a low-pressure cylinder and a generator which are sequentially connected;
the trough type solar heat collection subsystem comprises a solar heat collector, an inlet water heater, a first high-pressure water pump and a first mixer, wherein the inlet of the solar heat collector is connected with the outlet of the water inlet heater, the inlet of the inlet water heater is connected with the outlet of the first high-pressure water pump, and the inlet of the first high-pressure water pump is connected with the outlet of the first mixer;
the waste heat boiler subsystem comprises a condenser, a low-pressure water pump, a first flow divider, a second mixer, a condensed water preheater, a second flow divider and a high-pressure superheater, the condenser is connected with a low-pressure cylinder, the low-pressure water pump is connected with the condenser, an inlet of the first flow divider is connected with the low-pressure water pump, a first path outlet of the first flow divider is connected with a first path inlet of the second mixer, a second path inlet of the second mixer is connected with a heat source medium outlet of an inlet water heater, an outlet of the second mixer is connected with an inlet of the condensed water preheater, an outlet of the condensed water preheater is connected with an inlet of the second flow divider, a first path outlet of the second flow divider is connected with a first path inlet of the first mixer, a second path outlet of the first flow divider is connected with a second path inlet of the first mixer, and an outlet of the solar collector is connected with an inlet of the, and the outlet of the high-pressure superheater is connected with the high-pressure cylinder.
2. The temperature-controlled heating type solar and gas combined cycle power generation system according to claim 1, wherein the waste heat boiler subsystem further comprises a second high-pressure water pump, a high-pressure economizer, a high-pressure evaporator, a high-pressure steam drum and a third mixer, wherein a second path of outlet of the second flow divider is connected with an inlet of the second high-pressure water pump, an outlet of the second high-pressure water pump is connected with an inlet of the high-pressure economizer, an outlet of the high-pressure economizer is connected with inlets of the high-pressure steam drum and the high-pressure evaporator, an outlet of the high-pressure evaporator is connected with a first path of inlet of the third mixer, an outlet of the solar collector is connected with a second path of inlet of the third mixer, and an outlet of the third mixer is connected with an inlet of the high-pressure superheater.
3. The temperature-controlled heating type solar-gas combined cycle power generation system according to claim 1, wherein the waste heat boiler subsystem further comprises a low-pressure evaporator, a low-pressure steam drum and a low-pressure superheater, a third path of outlet of the second flow divider is connected with inlets of the low-pressure steam drum and the low-pressure evaporator, an outlet of the low-pressure steam drum is connected with an inlet of the low-pressure superheater, and an outlet of the low-pressure superheater is connected with the low-pressure cylinder.
4. A temperature controlled heating type solar gas combined cycle power generation system as claimed in claim 1 wherein the heat source of the inlet water heater is from extraction in the steam turbine subsystem or system superheated steam line.
5. The temperature-controlled heating type solar-gas combined cycle power generation system as claimed in claim 4, wherein a flow controller is connected to a heat source inlet of the inlet water heater, the flow controller is used for controlling the steam extraction amount of a steam turbine subsystem or a system superheated steam pipeline, and the steam extraction amount is adjusted in real time according to the inlet water parameter of the inlet water heater, so that the outlet temperature of the inlet water heater is maintained to a designed value.
6. The temperature-controlled heating type solar-gas combined cycle power generation system according to claim 1, wherein the waste heat boiler subsystem further comprises a temperature controller, the second outlet of the first flow divider is connected with an inlet of the temperature controller, an outlet of the temperature controller is connected with the second inlet of the first mixer, the temperature controller controls the flow of the exhaust gas of the waste heat boiler subsystem according to the size of the exhaust gas temperature of the waste heat boiler subsystem, when the exhaust gas temperature of the waste heat boiler subsystem is higher than a design value, the outlet water flow entering the condensate water preheater is increased, and when the exhaust gas temperature of the waste heat boiler subsystem is lower than the design value, the outlet water flow entering the condensate water preheater is decreased.
7. Method of operating a temperature controlled heating type solar gas combined cycle power generation system according to any of claims 1 to 6, characterized in that it comprises:
the gas compressor inputs compressed air into the combustion chamber through a pipeline, the input air and fuel are fully mixed and then are combusted to generate high-temperature and high-pressure gas, the high-temperature and high-pressure gas enters the gas turbine through the pipeline to do work and drive the generator to generate electricity, and exhaust gas at the outlet of the gas turbine enters the waste heat boiler subsystem for heating working medium water to be recycled;
steam which does work through a high-pressure cylinder and a low-pressure cylinder of a steam turbine subsystem enters a condenser through a pipeline to be condensed into condensed water, the generated condensed water enters a low-pressure water pump through the pipeline to be boosted and then enters a first flow divider to be divided into two paths, the first path of condensed water enters a second mixer and then is mixed with fluid at a heat source outlet of an inlet water heater, the second path of condensed water enters the first mixer, and outlet water of the second mixer enters a condensed water preheater to be preheated and then enters the second flow divider to be divided;
the first path of working medium water separated by the second flow divider enters the first mixer and then is mixed with the second path of condensed water from the first flow divider, then the mixed feed water is conveyed to an inlet water heater for heating through a first high-pressure water pump, a heat source of the inlet water heater is from steam extraction in a steam turbine subsystem or a system superheated steam pipeline, working medium water in the inlet water heater is heated to a temperature value corresponding to the designed close point temperature difference of a solar heat collector by the steam extraction, the heat source enters a second mixer for mixing after the steam extraction and the heat release, the heated water in the inlet water heater enters an inlet of the solar heat collector, and the inlet water is heated to a high-pressure saturated steam state by solar energy, and then the steam is introduced into a high-pressure superheater for heating and then enters a high-pressure cylinder of a steam turbine subsystem for expansion and work application, and the steam which does work through a low-pressure cylinder is condensed through a condenser and then continues to the next cycle.
8. The method of operating a temperature controlled heating type solar gas combined cycle power generation system as claimed in claim 7, further comprising:
and the second path of working medium water separated by the second flow divider enters a second high-pressure water pump to be pressurized and then flows into an inlet of the high-pressure economizer, the outlet water of the high-pressure economizer enters a high-pressure steam drum and an inlet of the high-pressure evaporator, the high-pressure saturated steam at the outlet of the high-pressure evaporator enters a third mixer to be mixed with the high-pressure saturated steam from the solar heat collector, and then enters a high-pressure superheater to be heated and then enters a high-pressure cylinder of the steam turbine subsystem to be expanded and do work.
9. The method of operating a temperature controlled heating type solar gas combined cycle power generation system as claimed in claim 7, further comprising:
and the third path of working medium water separated by the second flow divider enters the inlets of the low-pressure steam drum and the low-pressure evaporator, and saturated steam at the outlet of the low-pressure steam drum enters the inlet of the low-pressure superheater and enters the low-pressure cylinder of the steam turbine to expand and do work after being heated by the low-pressure superheater.
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