CN116557094A - Thermoelectric cooperative system integrating compressed air energy storage and operation method - Google Patents
Thermoelectric cooperative system integrating compressed air energy storage and operation method Download PDFInfo
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- CN116557094A CN116557094A CN202310646420.6A CN202310646420A CN116557094A CN 116557094 A CN116557094 A CN 116557094A CN 202310646420 A CN202310646420 A CN 202310646420A CN 116557094 A CN116557094 A CN 116557094A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 17
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- 230000006835 compression Effects 0.000 claims abstract description 67
- 238000007906 compression Methods 0.000 claims abstract description 67
- 238000000605 extraction Methods 0.000 claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 230000001105 regulatory effect Effects 0.000 claims description 83
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 10
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- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 8
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 7
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 239000003570 air Substances 0.000 claims 8
- 239000012080 ambient air Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 238000010248 power generation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 3
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- 230000007613 environmental effect Effects 0.000 description 2
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- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
Classifications
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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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
- F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
- F01K3/14—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having both steam accumulator and heater, e.g. superheating accumulator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J15/00—Systems for storing electric energy
- H02J15/006—Systems for storing electric energy in the form of pneumatic energy, e.g. compressed air energy storage [CAES]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
Abstract
A thermoelectric cooperative system integrating compressed air energy storage and an operation method thereof are provided, wherein the system comprises a pumping condensing unit, a steam ejector, a compressor unit, a compression cooler unit, an expansion heater unit, an air storage chamber, a motor, a generator, a high back pressure unit, a heat supply condenser, various pipeline valves and the like. In the heating season energy storage stage, the compressor unit consumes electric energy and stores high-pressure air in the air storage chamber, and the multistage compression heat is used for assisting the heat supply of the heat supply network. In the heating Ji Shi energy stage, the air storage chamber releases high-pressure air and works in the expansion unit to drive the generator to generate electricity, and the heat supply network water is used as a multistage heating source required in the expansion process. Meanwhile, the heat supply network backwater adopts a step heating mode, and the steam extraction injection turbine steam extraction of the turbine of the high back pressure unit steam turbine is sequentially used as a heat source. The invention realizes the high-efficiency integration of the compressed air energy storage and the thermoelectric unit, and the energy efficiency level and the peak shaving capacity of the system are obviously improved.
Description
Technical Field
The invention relates to the technical fields of cogeneration, power station peak shaving and compressed air energy storage, in particular to a thermoelectric synergistic system integrating compressed air energy storage and an operation method.
Background
The new energy power generation such as solar energy and wind energy has strong volatility and anti-peak shaving characteristics, and the increase of the network surfing duty ratio of the new energy power generation brings great challenges to the peak shaving of the power grid. With the rapid development of clean energy industry in China, the problem of the consumption of new energy power generation is still serious, and phenomena such as wind abandoning, light abandoning and the like are common. At present, the thermal power generation capacity of China is excessive, the annual utilization hours of power generation equipment are low, and the continuous low-load operation or the deep peak regulation operation of the thermal power generating unit can become a normal state in the next years. The heat and power cogeneration unit has high specific gravity and high capacity in thermal power generation, and the improvement of the deep peak shaving capacity of the heat and power cogeneration unit is a key technology for effectively absorbing renewable energy sources for power generation. The conventional deep peak shaving technology of the thermoelectric unit at present has the following problems:
(1) The energy utilization level of peak regulation modes such as an electric boiler, bypass main steam and the like is low. In order to improve the heat supply capacity of the unit in the heat peak period, the energy efficiency level of the unit is reduced.
(2) The conventional cogeneration peak shaving system has the practical problems of inflexible parameter adjustment, inflexible heat source steam selection, low energy utilization efficiency, small peak shaving depth and the like.
Disclosure of Invention
In order to solve the problems of the prior art, the invention aims to provide a thermoelectric cooperative system integrating compressed air energy storage and an operation method thereof, wherein in a heating season energy storage stage, a compressor unit consumes electric energy and stores high-pressure air in an air storage chamber, and multistage compression heat is used for assisting a heat supply network to supply heat. In the heating season energy release stage, the air storage chamber releases high-pressure air and works in the expansion unit to drive the generator to generate electricity, and the heat supply network water is used as a multistage heating source required in the expansion process. Meanwhile, the heat supply network backwater adopts a step heating mode, and the steam exhausted by the low-pressure cylinder of the turbine of the high back pressure unit and the steam exhausted by the low-pressure cylinder of the turbine of the extraction condensing unit are sequentially used as heat sources. The invention realizes the high-efficiency integration of the compressed air energy storage and the thermoelectric unit, and the energy efficiency level and the peak shaving capacity of the system are obviously improved. The invention realizes the flexible and rapid switching of the working modes of the power station system in the peak-valley (energy storage-energy release) period, realizes the ordered utilization of energy steps in the peak regulation process, and has the advantages of high energy utilization efficiency, large peak regulation depth and flexible parameter adjustment.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the integrated compressed air energy storage thermoelectric cooperative system comprises a main steam side of a boiler 101, a high-pressure cylinder 102 of a suction condensing unit, a reheat steam side of the boiler 101, a middle pressure cylinder 103 of the suction condensing unit and a low pressure cylinder 104 of the suction condensing unit which are sequentially communicated; the steam exhaust pipeline of the high-pressure cylinder 102 of the extraction condensing unit is communicated with the first-stage regenerative steam extraction pipeline and is communicated with the injection steam side of the injector 113 through a control valve A111; the second-stage steam extraction pipeline, the third-stage steam extraction pipeline and the fourth-stage steam extraction pipeline which are communicated with the pressure of the pressure cylinder 103 in the extraction condensing unit and sequentially reduced are respectively communicated with the injection steam side of the injector 113 through a control valve B110, a control valve C109 and a control valve T108; the third stage extraction pipe is communicated with the deaerator 112; the steam exhaust pipeline of the low-pressure cylinder 104 of the extraction condensing unit is communicated with the ejected steam side of the ejector 113 through the regulating valve A106; the outlet of the injector 113 is in turn communicated with the shell side of the heat supply network heater 107 and the deaerator 112; the steam exhaust pipeline of the low pressure cylinder 201 of the high back pressure unit is sequentially communicated with a three-way regulating valve G202, an air-cooled condenser 203 and a back pressure unit backwater system, and the three-way regulating valve G202 is sequentially communicated with the shell side of a heat supply condenser 204 and the air-cooled condenser 203 through pipelines; the heat supply network backwater is divided into two paths after passing through the regulating valve B415, one path is sequentially communicated with the pipe side of the heat supply condenser 204, the pipe side of the heat supply network heater 107, the regulating valve C313 and the heat supply network water supply pipeline through pipelines, and the other path is sequentially communicated with the outlets of the control valve B416 and the variable-frequency water pump A319 through pipelines; the inlet of the variable-frequency water pump A319 is respectively communicated with the pipe side outlets of the expansion heater A305, the expansion heater B306, the expansion heater C307 and the expansion heater T308 through pipelines; the pipe side inlets of the expansion heater A305, the expansion heater B306 and the expansion heater C307 are respectively communicated with a three-way regulating valve A315, a three-way regulating valve B316 and a three-way regulating valve C317 through pipelines; the pipe side inlet of the expansion heater T308 is sequentially communicated with a three-way regulating valve C317, a three-way regulating valve B316, a three-way regulating valve A315, a control valve F314, a regulating valve C313 and a heat supply network water supply pipeline; the heat supply network water return pipeline is also communicated with pipe side inlets of the compression cooler A406, the compression cooler B407, the compression cooler C408 and the compression cooler D409 respectively through a control valve octyl 414; the pipe side outlets of the compression cooler A406, the compression cooler B407 and the compression cooler C408 are respectively communicated with a three-way regulating valve T411, a three-way regulating valve F412 and a three-way regulating valve F413; the pipe side outlet of the compression cooler T409 is sequentially communicated with a three-way regulating valve I413, a three-way regulating valve F412, a three-way regulating valve T411, a variable-frequency water pump B418, a control valve G318 and the pipe side outlet of the heat supply network heater 107; the environmental air pipeline is sequentially communicated with the shell side of a compression cooler butyl 409, the shell side of a compression cooler butyl 405, the shell side of a compression cooler C408, the shell side of a compression cooler C404, the shell side of a compression cooler B407, the shell side of a compression cooler B403, the shell side of a compression cooler A406, a compressor A402, a control valve decyl 410, an air storage chamber 312, a control valve nonyl 311, a throttle valve 310, the shell side of an expansion heater butyl 308, the shell side of an expansion heater C307, the shell side of an expansion heater C303, the shell side of an expansion heater B306, the shell side of an expansion heater B302, the shell side of an expansion heater A305, an expansion machine A301 and an expansion unit exhaust pipeline; the first compressor 402, the second compressor 403, the third compressor 404 and the fourth compressor 405 are respectively connected with the rotating shaft of the motor 401 through mechanical shafts; the expander A301, the expander B302, the expander C303 and the expander D304 are sequentially connected with a rotating shaft of the generator 309 through mechanical shafts; the high-pressure cylinder 102, the middle-pressure cylinder 103 and the low-pressure cylinder 104 of the extraction-condensation unit are sequentially connected with the rotating shaft of the generator 105 of the extraction-condensation unit through a mechanical shaft; the high back pressure unit generator 205 is connected with the high back pressure unit low pressure cylinder 201 through a mechanical shaft; the high back pressure unit generator 205 is connected in turn to the switch 417 and the motor 401 via an electrical circuit.
The operation method of the thermoelectric cooperative system integrating compressed air energy storage is characterized in that the heating season energy storage stage operates according to the following modes: the expansion train and expansion heater are not operating, while the compressor train and compression cooler are operating, so that high pressure air is stored in the air reservoir 312; closing the control valve nonyl 311, the control valve pentyl 314, the control valve hexyl 416 and the variable frequency water pump A319, closing the switch 417, and opening the control valve heptyl 318, the control valve octyl 414, the control valve decyl 410 and the variable frequency water pump B418; adjusting the variable-frequency water pump B418 to enable working media in the pipeline to flow from the variable-frequency water pump B418 to a heat supply network water supply pipeline, and adjusting the total flow of the working media flowing through the variable-frequency water pump B418 to enable the temperature difference between the working media at the side outlet of each compression cooler pipe and the heat supply network water supply to be controlled within a preset temperature difference; the temperature difference of the working media at the side of the tube of the compression cooler A406, the compression cooler B407, the compression cooler C408 and the compression cooler D409 is controlled within a preset temperature difference by adjusting the three-way adjusting valve T411, the three-way adjusting valve F412 and the three-way adjusting valve F413.
The operation method of the thermoelectric cooperative system integrating compressed air energy storage is characterized in that heating Ji Shi can be operated in the following way: the expansion train and expansion heater are operated, while the compressor train and compression cooler are not operated, and high pressure air is released from the air reservoir 312; opening the control valve non311, the control valve pent314, the control valve hexol 416 and the variable frequency water pump A319, opening the switch 417, closing the control valve hept 318, the control valve oct 414, the control valve dec 410 and the variable frequency water pump B418; adjusting the variable-frequency water pump A319 to enable the working medium in the pipeline to flow from the variable-frequency water pump A319 to the pipe side of the heat supply condenser 204, and adjusting the total flow of the working medium flowing through the variable-frequency water pump A319 to enable the temperature difference between the outlet working medium at the pipe side of each expansion heater and the return water of the heat supply network to be controlled within a preset temperature difference; the temperature difference of the working mediums at the side outlets of the expansion heater A305, the expansion heater B306, the expansion heater C307 and the expansion heater D308 is controlled within a preset temperature difference by adjusting the three-way regulating valve A315, the three-way regulating valve B316 and the three-way regulating valve C317.
The operation method of the thermoelectric cooperative system integrating compressed air energy storage is characterized in that when the heating Ji Chuneng and energy release phases are operated: flexibly selecting the injection steam parameters of the injector 113 according to the heat load, namely dividing the heat load into four grades according to the change from maximum to minimum of the heat supply network water heat load, and sequentially adopting and only adopting a first-stage steam extraction opening control valve A111, a second-stage steam extraction opening control valve B110, a third-stage steam extraction opening control valve C109 and a fourth-stage steam extraction opening control valve T108 of a steam turbine of the extraction condensing unit as the injection steam of the injector 113; and in each heat load level, the opening of the regulating valve A106 and the opening of the valve of the injection steam pipeline are regulated according to the injection steam parameters of the injector 113, and the outlet flow distribution proportion of the three-way regulating valve G202 is regulated according to the heat load, so that the water supply temperature of the heat supply network is kept within a required range.
Compared with the prior art, the invention has the following advantages:
(1) The heat supply network backwater adopts high back pressure unit exhaust steam and ejector cascade heating to realize ordered utilization of energy cascade.
(2) The extraction and condensation unit steam turbine is adopted to extract steam and jet the low-pressure cylinder to exhaust steam, so that the waste heat recovery and utilization are fully realized, and the energy efficiency level of the system is improved.
(3) The compressed air energy storage system and the thermoelectric unit heat and electric energy flows are complementarily exchanged, and the steam ejector is adopted to realize high-grade heat increment, so that the heating season energy efficiency level and the operation flexibility of the extraction condensation type and Gao Beiya type cogeneration unit are improved.
(4) The invention improves the flexible switching speed of the working modes of the heating season cogeneration system in the peak-valley period, and has large peak regulation depth and flexible parameter adjustment.
Drawings
FIG. 1 is a schematic diagram of a thermoelectric co-system and method of operation of the present invention integrating compressed air energy storage.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
In order to realize efficient and flexible coupling of a compressed air energy storage technology and a cogeneration unit, the invention relates to a thermoelectric collaborative system integrating compressed air energy storage, which is shown in fig. 1, and comprises a main steam side of a boiler 101, a high-pressure cylinder 102 of a suction condensing unit, a reheat steam side of the boiler 101, a middle pressure cylinder 103 of the suction condensing unit and a low-pressure cylinder 104 of the suction condensing unit which are sequentially communicated; the steam exhaust pipeline of the high-pressure cylinder 102 of the extraction condensing unit is communicated with the first-stage regenerative steam extraction pipeline and is communicated with the injection steam side of the injector 113 through a control valve A111; the second-stage steam extraction pipeline, the third-stage steam extraction pipeline and the fourth-stage steam extraction pipeline which are communicated with the pressure of the pressure cylinder 103 in the extraction condensing unit and sequentially reduced are respectively communicated with the injection steam side of the injector 113 through a control valve B110, a control valve C109 and a control valve T108; the third stage extraction pipe is communicated with the deaerator 112; the steam exhaust pipeline of the low-pressure cylinder 104 of the extraction condensing unit is communicated with the ejected steam side of the ejector 113 through the regulating valve A106; the outlet of the injector 113 is in turn communicated with the shell side of the heat supply network heater 107 and the deaerator 112; the steam exhaust pipeline of the low pressure cylinder 201 of the high back pressure unit is sequentially communicated with a three-way regulating valve G202, an air-cooled condenser 203 and a back pressure unit backwater system, and the three-way regulating valve G202 is sequentially communicated with the shell side of a heat supply condenser 204 and the air-cooled condenser 203 through pipelines; the heat supply network backwater is divided into two paths after passing through the regulating valve B415, one path is sequentially communicated with the pipe side of the heat supply condenser 204, the pipe side of the heat supply network heater 107, the regulating valve C313 and the heat supply network water supply pipeline through pipelines, and the other path is sequentially communicated with the outlets of the control valve B416 and the variable-frequency water pump A319 through pipelines; the inlet of the variable-frequency water pump A319 is respectively communicated with the pipe side outlets of the expansion heater A305, the expansion heater B306, the expansion heater C307 and the expansion heater T308 through pipelines; the pipe side inlets of the expansion heater A305, the expansion heater B306 and the expansion heater C307 are respectively communicated with a three-way regulating valve A315, a three-way regulating valve B316 and a three-way regulating valve C317 through pipelines; the pipe side inlet of the expansion heater T308 is sequentially communicated with a three-way regulating valve C317, a three-way regulating valve B316, a three-way regulating valve A315, a control valve F314, a regulating valve C313 and a heat supply network water supply pipeline; the heat supply network water return pipeline is also communicated with pipe side inlets of the compression cooler A406, the compression cooler B407, the compression cooler C408 and the compression cooler D409 respectively through a control valve octyl 414; the pipe side outlets of the compression cooler A406, the compression cooler B407 and the compression cooler C408 are respectively communicated with a three-way regulating valve T411, a three-way regulating valve F412 and a three-way regulating valve F413; the pipe side outlet of the compression cooler T409 is sequentially communicated with a three-way regulating valve I413, a three-way regulating valve F412, a three-way regulating valve T411, a variable-frequency water pump B418, a control valve G318 and the pipe side outlet of the heat supply network heater 107; the environmental air pipeline is sequentially communicated with the shell side of a compression cooler butyl 409, the shell side of a compression cooler butyl 405, the shell side of a compression cooler C408, the shell side of a compression cooler C404, the shell side of a compression cooler B407, the shell side of a compression cooler B403, the shell side of a compression cooler A406, a compressor A402, a control valve decyl 410, an air storage chamber 312, a control valve nonyl 311, a throttle valve 310, the shell side of an expansion heater butyl 308, the shell side of an expansion heater C307, the shell side of an expansion heater C303, the shell side of an expansion heater B306, the shell side of an expansion heater B302, the shell side of an expansion heater A305, an expansion machine A301 and an expansion unit exhaust pipeline; the first compressor 402, the second compressor 403, the third compressor 404 and the fourth compressor 405 are respectively connected with the rotating shaft of the motor 401 through mechanical shafts; the expander A301, the expander B302, the expander C303 and the expander D304 are sequentially connected with a rotating shaft of the generator 309 through mechanical shafts; the high-pressure cylinder 102, the middle-pressure cylinder 103 and the low-pressure cylinder 104 of the extraction-condensation unit are sequentially connected with the rotating shaft of the generator 105 of the extraction-condensation unit through a mechanical shaft; the high back pressure unit generator 205 is connected with the high back pressure unit low pressure cylinder 201 through a mechanical shaft; the high back pressure unit generator 205 is connected in turn to the switch 417 and the motor 401 via an electrical circuit. According to the system configuration of the invention, the energy cascade ordered utilization of the system can be realized by exhausting steam through the high back pressure unit and heating the backwater of the heat supply network through the cascade of the ejector.
In order to more scientifically and effectively develop the economical and flexibility potential of the thermoelectric synergistic system integrating compressed air energy storage, the heating season energy storage stage of the system operates in the following manner: the expansion train and expansion heater are not operating, while the compressor train and compression cooler are operating, so that high pressure air is stored in the air reservoir 312; closing the control valve non311 to block the flow of air from the air reservoir 312 to the expansion unit; closing the control valve penta 314 and the control valve penta 416 to prevent working medium in a pipeline where the valve is positioned from flowing; closing the variable-frequency water pump A319 so that the pipeline working medium does not circulate; closing switch 417 to operate the motor, opening control valve heptyl 318 and control valve octyl 414 to allow working fluid water to flow through each compression cooler; opening the control valve decyl 410 to allow high pressure air to flow from the compressor train to the reservoir 312; opening a variable-frequency water pump B418, adjusting the variable-frequency water pump B418 to control the flow direction of working media flowing through the water pump, so that the working media in a pipeline where the working media are positioned flow from the variable-frequency water pump B418 to a heat supply network water supply pipeline, and adjusting the total flow of the working media flowing through the variable-frequency water pump B418, so that the temperature difference between the working media at the side outlet of each compression cooler pipe and the heat supply network water supply is controlled within 3 ℃; and the opening degrees of the three-way regulating valve T411, the three-way regulating valve F412 and the three-way regulating valve F413 are regulated, so that the hot water flow of the outlet pipeline of the three-way valve is reasonably distributed, and the temperature difference of outlet working media at the side of the compression cooler A406, the compression cooler B407, the compression cooler C408 and the compression cooler T409 is controlled within 3 ℃. The extraction and condensation unit steam turbine is adopted to extract steam and jet the low-pressure cylinder to exhaust steam, so that the waste heat recovery and utilization of the system can be fully realized, and the energy efficiency level of the system is improved.
The operation method of the thermoelectric cooperative system integrating compressed air energy storage is characterized in that heating Ji Shi can be operated in the following way: the expansion train and expansion heater are operated, while the compressor train and compression cooler are not operated, and high pressure air is released from the air reservoir 312; opening a control valve non311 to enable high-pressure air in the air storage chamber 312 to flow to the expansion unit; opening a control valve F314, a control valve F416 and a variable-frequency water pump A319 to enable working medium in a pipeline where the valve is positioned to circulate; opening switch 417 deactivates motor 401; closing the control valve heptyl 318 and the control valve octyl 414 to prevent working medium in a pipeline where the valve is positioned from flowing; closing the control valve decyl 410 blocks the flow of air from the compressor package to the reservoir 312; turning off the variable-frequency water pump B418; adjusting the variable-frequency water pump A319 to control the flow direction of the working medium in the pipeline, so that the working medium in the pipeline flows from the variable-frequency water pump A319 to the pipe side of the heat supply condenser 204, and adjusting the total flow of the working medium flowing through the variable-frequency water pump A319, so that the temperature difference between the outlet working medium at the pipe side of each expansion heater and the return water of the heat supply network is controlled within 3 ℃; and opening degrees of the three-way regulating valve A315, the three-way regulating valve B316 and the three-way regulating valve C317 are regulated, so that hot water flow of outlet pipelines of the three-way valves is reasonably distributed, and temperature differences of outlet working media at the pipe sides of the expansion heater A305, the expansion heater B306, the expansion heater C307 and the expansion heater T308 are controlled within 3 ℃. The invention realizes high-grade heat increment by complementarily exchanging the compressed air energy storage system with the heat and electric energy flow of the thermoelectric unit and adopting the steam ejector, thereby improving the energy efficiency level and the operation flexibility of the heating season of the extraction condensing type and Gao Beiya type cogeneration units.
The operation method of the thermoelectric cooperative system integrating compressed air energy storage is characterized in that when the heating Ji Chuneng and energy release phases are operated: flexibly selecting the injection steam parameters of the injector 113 according to the heat load, namely dividing the heat load into four grades according to the change from maximum to minimum of the heat supply network water heat load, and sequentially adopting and only adopting a first-stage steam extraction opening control valve A111, a second-stage steam extraction opening control valve B110, a third-stage steam extraction opening control valve C109 and a fourth-stage steam extraction opening control valve T108 of a steam turbine of the extraction condensing unit as the injection steam of the injector 113; and in each heat load level, the opening of the regulating valve A106 and the opening of the valve of the injection steam pipeline are regulated according to the injection steam parameters of the injector 113, and the outlet flow distribution proportion of the three-way regulating valve G202 is regulated according to the heat load, so that the water supply temperature of the heat supply network is kept within a required range. Through reasonable matching of the operation method and the system configuration, the invention can realize flexible switching speed of the working modes of the heating season heat motor unit in the peak-valley period, large peak regulation depth and flexible parameter adjustment.
Claims (3)
1. A thermoelectric cooperative system integrating compressed air energy storage comprises a main steam side of a boiler (101), a high-pressure cylinder (102) of a suction condensing unit, a reheat steam side of the boiler (101), a middle-pressure cylinder (103) of the suction condensing unit and a low-pressure cylinder (104) of the suction condensing unit which are sequentially communicated; the steam exhaust pipeline of the high-pressure cylinder (102) of the extraction condensing unit is communicated with the first-stage regenerative steam extraction pipeline and is communicated with the injection steam side of the injector (113) through a control valve A (111); the second-stage steam extraction pipeline, the third-stage steam extraction pipeline and the fourth-stage steam extraction pipeline which are communicated with the pressure of a pressure cylinder (103) in the extraction condensing unit and sequentially reduced are respectively communicated with the injection steam side of an injector (113) through a control valve B (110), a control valve C (109) and a control valve T (108); the third-stage steam extraction pipeline is communicated with the deaerator (112); the exhaust pipeline of the low-pressure cylinder (104) of the extraction condensing unit is communicated with the ejected steam side of the ejector (113) through an adjusting valve A (106); the outlet of the ejector (113) is sequentially communicated with the shell side of the heat supply network heater (107) and the deaerator (112); the steam exhaust pipeline of the low-pressure cylinder (201) of the high-back pressure unit is sequentially communicated with the three-way regulating valve heptyl (202), the air-cooled condenser (203) and the back pressure unit backwater system, and the three-way regulating valve heptyl (202) is sequentially communicated with the shell side of the heat supply condenser (204) and the air-cooled condenser (203) through pipelines; the heat supply network backwater is divided into two paths after passing through the regulating valve B (415), one path is sequentially communicated with the pipe side of the heat supply condenser (204), the pipe side of the heat supply network heater (107), the regulating valve C (313) and the heat supply network water supply pipeline through pipelines, and the other path is sequentially communicated with the outlets of the control valve A (416) and the variable-frequency water pump A (319) through pipelines; the inlet of the variable-frequency water pump A (319) is respectively communicated with the pipe side outlets of the expansion heater A (305), the expansion heater B (306), the expansion heater C (307) and the expansion heater D (308) through pipelines; the pipe side inlets of the expansion heater A (305), the expansion heater B (306) and the expansion heater C (307) are respectively communicated with a three-way regulating valve A (315), a three-way regulating valve B (316) and a three-way regulating valve C (317) through pipelines; the pipe side inlet of the expansion heater T (308) is sequentially communicated with a three-way regulating valve C (317), a three-way regulating valve B (316), a three-way regulating valve A (315), a control valve F (314), a regulating valve C (313) and a heat supply network water supply pipeline; the heat supply network water return pipeline is also communicated with pipe side inlets of a compression cooler A (406), a compression cooler B (407), a compression cooler C (408) and a compression cooler D (409) through a control valve octyl (414) respectively; the pipe side outlets of the compression cooler A (406), the compression cooler B (407) and the compression cooler C (408) are respectively communicated with a three-way regulating valve T (411), a three-way regulating valve F (412) and a three-way regulating valve F (413); the pipe side outlet of the compression cooler T (409) is sequentially communicated with a three-way regulating valve I (413), a three-way regulating valve F (412), a three-way regulating valve T (411), a variable-frequency water pump B (418), a control valve G (318) and the pipe side outlet of the heating network heater (107); the ambient air pipeline is sequentially communicated with a compression cooler butyl (409) shell side, a compressor butyl (405), a compression cooler C (408) shell side, a compressor C (404), a compression cooler B (407) shell side, a compressor B (403), a compression cooler A (406) shell side, a compressor A (402), a control valve decyl (410), an air storage chamber (312), a control valve nonyl (311), a throttle valve (310), an expansion heater butyl (308) shell side, an expansion heater butyl (304), an expansion heater C (307) shell side, an expansion heater C (303), an expansion heater B (306) shell side, an expansion heater B (302), an expansion heater A (305) shell side, an expansion machine A (301) and an expansion unit exhaust pipeline; the first compressor (402), the second compressor (403), the third compressor (404) and the fourth compressor (405) are respectively connected with the rotating shaft of the motor (401) through mechanical shafts; the expander A (301), the expander B (302), the expander C (303) and the expander D (304) are sequentially connected with a rotating shaft of a generator (309) through a mechanical shaft; the high-pressure cylinder (102), the middle-pressure cylinder (103) and the low-pressure cylinder (104) of the extraction-condensation unit are sequentially connected with the rotating shaft of the generator (105) of the extraction-condensation unit through a mechanical shaft; the high back pressure unit generator (205) is connected with the low pressure cylinder (201) of the high back pressure unit through a mechanical shaft; the high back pressure unit generator (205) is connected with the switch (417) and the motor (401) in turn through a circuit.
2. A method of operating an integrated compressed air energy storage thermoelectric co-system according to claim 1, wherein: the heating season energy storage stage operates in the following manner: the expansion unit and expansion heater are deactivated and the compressor unit and compression cooler are activated, thereby causing the high pressure air to be stored in the air reservoir (312); closing a control valve non (311), a control valve penta (314), a control valve de (416) and a variable frequency water pump A (319), closing a switch (417), opening a control valve heptyl (318), a control valve octyl (414), a control valve decyl (410) and a variable frequency water pump B (418); adjusting the variable-frequency water pump B (418) to enable working media in the pipeline to flow from the variable-frequency water pump B (418) to a heat supply network water supply pipeline, and adjusting the total flow of the working media flowing through the variable-frequency water pump B (418) to enable the temperature difference between the working media at the side outlet of each compression cooler pipe and the heat supply network water supply to be controlled within a preset temperature difference; the three-way regulating valve T (411), the three-way regulating valve F (412) and the three-way regulating valve F (413) are respectively regulated to control the temperature difference of the working media at the side outlets of the compression cooler A (406), the compression cooler B (407), the compression cooler C (408) and the compression cooler T (409) within a preset temperature difference.
Heating Ji Shi can be staged as follows: the expansion unit and the expansion heater are operated, the compressor unit and the compression cooler are not operated, and high-pressure air is released from the air storage chamber (312); opening a control valve non (311), a control valve penta (314), a control valve de (416) and a variable frequency water pump A (319), opening a switch (417), closing a control valve heptyl (318), a control valve octyl (414), a control valve decyl (410) and a variable frequency water pump B (418); the variable-frequency water pump A (319) is regulated to enable working media in a pipeline to flow from the variable-frequency water pump A (319) to the pipe side of the heat supply condenser (204), and the total flow of the working media flowing through the variable-frequency water pump A (319) is regulated to enable the temperature of the working media at the outlet of the pipe side of each expansion heater and the temperature difference of the backwater of the heat supply network to be controlled within a preset temperature difference; and the temperature difference of the working media at the side outlets of the expansion heater A (305), the expansion heater B (306), the expansion heater C (307) and the expansion heater T (308) is controlled within a preset temperature difference by adjusting the three-way regulating valve A (315), the three-way regulating valve B (316) and the three-way regulating valve C (317) respectively.
3. A method of operating an integrated compressed air energy storage thermoelectric co-system according to claim 2, wherein: in the heating Ji Chuneng and energy release stages, flexibly selecting injection steam parameters of an injector (113) according to the heat load, namely dividing the heat load into four grades according to the maximum-to-minimum change of the heat load of water supply of a heat supply network, and respectively adopting a first-stage steam extraction opening control valve A (111), a second-stage steam extraction opening control valve B (110) and a third-stage steam extraction opening control valve C (109) of a steam extraction condensing unit turbine and a fourth-stage steam extraction opening control valve T (108) as injection steam of the injector (113) in sequence;
and in each heat load level, adjusting the opening of the regulating valve A (106) and the opening of the valve of the injection steam pipeline according to the injection steam parameters of the injector (113), and adjusting the outlet flow distribution proportion of the three-way regulating valve G (202) according to the heat load, so that the water supply temperature of the heat supply network is kept in a required range.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117329740A (en) * | 2023-11-29 | 2024-01-02 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Injection assembly and aircraft thermal management system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117329740A (en) * | 2023-11-29 | 2024-01-02 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Injection assembly and aircraft thermal management system |
| CN117329740B (en) * | 2023-11-29 | 2024-01-30 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Injection assembly and aircraft thermal management system |
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