CN115075895A - Integrated energy supply system for coupling liquefied air energy storage and thermal power generation - Google Patents
Integrated energy supply system for coupling liquefied air energy storage and thermal power generation Download PDFInfo
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- CN115075895A CN115075895A CN202210764112.9A CN202210764112A CN115075895A CN 115075895 A CN115075895 A CN 115075895A CN 202210764112 A CN202210764112 A CN 202210764112A CN 115075895 A CN115075895 A CN 115075895A
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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
- 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
- F01D15/08—Adaptations for driving, or combinations with, pumps
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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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/06—Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel or plant
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Abstract
The application relates to a comprehensive energy supply system for coupling liquefied air energy storage and thermal power generation. The specific scheme is as follows: the outlet of the boiler is respectively connected with the inlet of the steam turbine and the inlet of the small steam turbine; the outlet of the steam turbine is connected with the heating equipment; the small steam turbine is connected with the compressor unit; the outlet of the compressor unit is connected with the first inlet of the cold accumulation heat regenerator; the first outlet of the cold accumulation heat regenerator is connected with the inlet of the gas-liquid separator, the pure oxygen outlet of the gas-liquid separator is sequentially connected with the third inlet of the cold accumulation heat regenerator and the oxygen supply device, and the pure nitrogen outlet of the gas-liquid separator is sequentially connected with the fourth inlet of the cold accumulation heat regenerator and the nitrogen supply device; and a second outlet of the cold accumulation heat regenerator is connected with an inlet of an expansion unit, an outlet of the expansion unit is connected with fresh air supply equipment, and an energy storage unit is connected with a second generator shaft. The method and the device improve the deep peak shaving capacity of the thermal power generating unit.
Description
Technical Field
The application relates to the technical field of comprehensive energy supply, in particular to a comprehensive energy supply system for coupling liquefied air energy storage and thermal power generation.
Background
In the related art, the compressed air energy storage technology is considered as one of the technologies suitable for large capacity and long-term electric energy storage. The compressed air energy storage utilizes the compression heat generated in the compression process to heat the air entering the expansion machine to do work in the energy release stage, so that the electricity-electricity conversion efficiency of the system is improved to a certain extent. There is still a strong coupling between compressor heat rejection and expander heat absorption, limiting the flexible application of the system.
Disclosure of Invention
Therefore, the application provides an integrated energy supply system for coupling liquefied air energy storage and thermal power generation. The technical scheme of the application is as follows:
according to the comprehensive energy supply system for coupling liquefied air energy storage and thermal power generation provided by the embodiment of the application, the system comprises a thermal power device and a liquefied energy storage device, the thermal power device comprises a boiler, a steam turbine, a first generator and a small steam turbine, the liquefied energy storage device comprises an expansion unit, a compression unit, an energy storage unit and a second generator, the energy storage unit comprises a cold accumulation heat regenerator, a liquid air storage tank and a gas-liquid separator, wherein,
the outlet of the boiler is respectively connected with the inlet of the steam turbine and the inlet of the small steam turbine;
the steam turbine is connected with the first generator shaft through a transmission shaft, and an outlet of the steam turbine is connected with the heat supply equipment through a pipeline;
the small steam turbine is connected with the compressor unit through a transmission shaft;
a shell side inlet of the compressor unit is connected with an air source, and a shell side outlet of the compressor unit is connected with a first inlet of the cold accumulation heat regenerator;
the first outlet of the cold accumulation heat regenerator is connected with the inlet of the gas-liquid separator, the liquid outlet of the gas-liquid separator is sequentially connected with the liquid air storage tank and the second inlet of the cold accumulation heat regenerator, the pure oxygen outlet of the gas-liquid separator is sequentially connected with the third inlet of the cold accumulation heat regenerator and the oxygen supply device, and the pure nitrogen outlet of the gas-liquid separator is sequentially connected with the fourth inlet of the cold accumulation heat regenerator and the nitrogen supply device;
and a second outlet of the cold accumulation heat regenerator is connected with a pipe side inlet of the expansion unit, a pipe side outlet of the expansion unit is connected with fresh air supply equipment through a pipeline, and the energy storage unit is connected with the second generator shaft through a transmission shaft.
According to an embodiment of the application, the boiler comprises a burner, a boiler body, the energy storage unit further comprises an oxygen supply valve, wherein,
the burner is mounted on the boiler body;
a third outlet of the cold accumulation heat regenerator is connected with the first end of the oxygen supply valve;
the second end of the oxygen supply valve is connected with the inlet of the burner; and the third outlet of the cold accumulation heat regenerator is arranged corresponding to the third inlet of the cold accumulation heat regenerator.
According to one embodiment of the application, the system further comprises a heating valve, the boiler further comprises an air preheater, a secondary air heater, and a second valve, wherein,
the air preheater is installed inside an air inlet of the boiler body;
the outlet of the air preheater is sequentially connected with the tube side of the secondary air heater and the inlet of the burner through a pipeline;
a pipe side inlet of the compressor unit is connected with a heat exchange medium input pipeline;
a pipe side outlet of the compressor unit is connected with a first end of the second valve and a first end of the heat supply valve respectively;
the second end of the second valve is connected with a shell side inlet of the secondary air heater, and a shell side outlet of the secondary air heater is communicated with the outside;
and the second end of the heat supply valve is connected with the heat supply equipment.
According to one embodiment of the present application, the system further comprises an absorption chiller, wherein,
the outlet on the pipe side of the compressor unit is connected with the inlet of the absorption refrigerator;
and the outlet of the absorption refrigerator is connected with a cooling device.
According to one embodiment of the application, the shell side inlet of the expansion unit is connected with the cold exchange medium input pipeline, and the shell side outlet of the expansion unit is connected with the cold supply equipment.
According to one embodiment of the application, the system further comprises a cooling valve, wherein,
the pipe side outlet of the compressor unit is connected with the first end of the cold supply valve;
and the second end of the cold supply valve is connected with the inlet of the absorption refrigerator.
According to an embodiment of the application, the energy storage unit further comprises a throttle valve, wherein,
a first outlet of the cold accumulation heat regenerator is connected with a first end of the throttle valve;
the second end of the throttle valve is connected with the inlet of the gas-liquid separator.
According to an embodiment of the application, the energy storage unit further comprises a liquid pump, wherein,
the outlet of the liquid air storage tank is connected with the inlet of the liquid pump;
and the outlet of the liquid pump is connected with the second inlet of the cold accumulation heat regenerator.
According to an embodiment of the present application, the thermal power plant further comprises a first valve, wherein,
the outlet of the boiler is connected with the first end of the first valve;
and the second end of the first valve is connected with the inlet of the small steam turbine.
The technical scheme provided by the embodiment of the application at least has the following beneficial effects:
through coupling liquefaction energy memory and thermal power device, improved the ability of thermal power unit degree of depth peak regulation, can improve thermal power device's flexibility, when the power supply, through expander set, compressor unit and energy storage unit, realize the coproduction confession of cooling, heat supply, confession pure oxygen, confession pure nitrogen and confession new trend multiple type energy.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application and are not to be construed as limiting the application.
Fig. 1 is a schematic structural diagram of an integrated energy supply system coupling liquefied air energy storage and thermal power generation according to an embodiment of the present application.
Reference numerals
11. A boiler body; 12. a burner; 13. an air preheater; 14. a secondary air heater; 15. a steam turbine; 16. a first generator; 17. a first valve; 18. a small steam engine; 21. a compressor unit; 22. a cold storage heat regenerator; 23. a throttle valve; 24. a gas-liquid separator; 25. a liquid air storage tank; 26. a liquid pump; 27. an expander unit; 28. a second generator; 31. an absorption refrigerator; 32. a second valve; 33. a heat supply valve; 34. a cooling valve; 35. an oxygen supply valve.
Detailed Description
In order to make the technical solutions of the present application better understood by those of ordinary skill in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
It should be noted that, in the related art, the compressed air energy storage technology is considered to be one of the technologies suitable for large capacity and long time electric energy storage. The compressed air energy storage utilizes the compression heat generated in the compression process to heat the air entering the expansion machine to do work in the energy release stage, so that the electricity-electricity conversion efficiency of the system is improved to a certain extent. There is still a strong coupling between compressor heat rejection and expander heat rejection, limiting the flexible application of the system.
In view of the above problems, the present application provides an integrated energy supply system for coupling liquefied air energy storage and thermal power generation, and fig. 1 is a schematic structural diagram of an integrated energy supply system for coupling liquefied air energy storage and thermal power generation provided in an embodiment of the present application.
As shown in fig. 1, the integrated energy supply system for coupling liquefied air energy storage and thermal power generation includes: the thermal power device comprises a boiler, a steam turbine 15, a first generator 16 and a small steam turbine 18, the liquefaction energy storage device comprises an expansion unit 27, a compression unit 21, an energy storage unit and a second generator 28, and the energy storage unit comprises a cold accumulation heat regenerator 22, a liquid air storage tank 25 and a gas-liquid separator 24.
Wherein, the outlet of the boiler is respectively connected with the inlet of the steam turbine 15 and the inlet of the small steam turbine 18; the steam turbine 15 is connected with the first generator 16 through a transmission shaft, and an outlet of the steam turbine 15 is connected with the heating equipment through a pipeline; the small steam engine 18 is connected with the compressor unit 21 through a transmission shaft; a shell side inlet of the compressor unit 21 is connected with an air source, and a shell side outlet of the compressor unit 21 is connected with a first inlet of the cold accumulation regenerator 22; a first outlet of the cold accumulation heat regenerator 22 is connected with an inlet of a gas-liquid separator 24, a liquid outlet of the gas-liquid separator 24 is sequentially connected with a liquid air storage tank 25 and a second inlet of the cold accumulation heat regenerator 22, a pure oxygen outlet of the gas-liquid separator 24 is sequentially connected with a third inlet of the cold accumulation heat regenerator 22 and an oxygen supply device, and a pure nitrogen outlet of the gas-liquid separator 24 is sequentially connected with a fourth inlet of the cold accumulation heat regenerator 22 and a nitrogen supply device; the second outlet of the cold accumulation heat regenerator 22 is connected with the inlet of the tube side of the expansion unit 27, the outlet of the tube side of the expansion unit 27 is connected with the fresh air supply device through a pipeline, and the energy storage unit is connected with the second generator 28 through a transmission shaft.
It should be noted that "heat supply" in fig. 1 indicates that heat is supplied to the outside through a heat supply device, "fresh air supply" indicates that air is supplied to the outside through a fresh air supply device, "oxygen" indicates that oxygen is supplied to the outside through an oxygen supply device, and "nitrogen" indicates that nitrogen is supplied to the outside through a nitrogen supply device. The tube side may be a side of the apparatus for transferring a low temperature medium, and the shell side may be a side of the apparatus for transferring a high temperature medium. Wherein, the low temperature medium can be water, and the high temperature heat medium can be water.
As a possible example, when the thermal power generating unit needs low-load operation, the load changing rate of the steam turbine 15 is fast, the load changing delay of the boiler is high, in order to enable the steam turbine 15 and the boiler to respond to load reduction more quickly on the premise of power adaptation, a part of main steam can be extracted, the main steam rushes the small steam turbine 18 to drive the compressor in the compressor unit 21 to rotate, energy loss can be reduced, and higher-quality electric energy does not need to be consumed to drive the motor, so that the compressor is driven to rotate to do work.
In some embodiments of the present application, the thermal power plant further comprises a first valve 17, wherein the outlet of the boiler is connected to a first end of the first valve 17; a second end of the first valve 17 is connected to an inlet of a small steam turbine 18.
As an example of a possible implementation, the main steam flow entering the small steam turbine 18 from the boiler can be adjusted by adjusting the opening and closing angle of the first valve 17, thereby increasing the flexibility of peak shaving.
In some embodiments of the present application, the energy storage unit further includes a throttle valve 23, wherein a first outlet of the cold storage regenerator 22 is connected to a first end of the throttle valve 23; a second end of the throttle valve 23 is connected to an inlet of the gas-liquid separator 24.
It can be understood that the air may have un-liquefied air during liquefaction, and the oxygen and nitrogen are separated by the gas-liquid separator 24 according to their boiling points, so that pure oxygen and pure nitrogen can be provided after the cold energy is released in the cold storage regenerator 22.
As an example of a possible implementation, the opening and closing angle of the throttle valve 23 can be adjusted to change the pressure after the throttle valve 23, and further adjust the gas phase fraction, so as to distribute the liquefied air amount suitable for expansion power generation and the unliquefied air amount for separating pure oxygen and pure nitrogen.
In some embodiments of the present application, the energy storage unit further comprises a liquid pump 26, wherein an outlet of the liquid air storage tank 25 is connected to an inlet of the liquid pump 26; the outlet of the liquid pump 26 is connected to a second inlet of the cold storage regenerator 22.
As an example of a possible implementation, the liquid pump 26 feeds the liquid air in the liquid air storage tank 25 into the cold storage regenerator 22.
In some embodiments of the present application, the boiler comprises a burner 12, a boiler body 11, and the energy storage unit further comprises an oxygen supply valve 35, wherein the burner 12 is mounted on the boiler body 11; a third outlet of the cold accumulation regenerator 22 is connected with a first end of an oxygen supply valve 35; the second end of the oxygen supply valve 35 is connected to the inlet of the burner 12; wherein, the third outlet of the cold accumulation regenerator 22 is arranged corresponding to the third inlet of the cold accumulation regenerator 22.
As a possible implementation example, the opening and closing angle of the oxygen supply valve 35 can be adjusted according to the actual requirement of the oxygen-enriched combustion of the boiler, so as to supply pure oxygen to the boiler, thereby improving the combustion effect of the boiler and reducing the combustion pollutants of the boiler.
In some embodiments of the present application, the system further comprises a heating valve 33, the boiler further comprises an air preheater 13, a overfire air heater 14 and a second valve 32, wherein the air preheater 13 is installed inside the air inlet of the boiler body 11; the outlet of the air preheater 13 is sequentially connected with the tube side of the secondary air heater 14 and the inlet of the combustor 12 through a pipeline; the inlet at the tube side of the compressor unit 21 is connected with a heat exchange medium input pipeline; the pipe-side outlets of the compressor group 21 are connected to the first end of the second valve 32 and the first end of the heat supply valve 33, respectively; a second end of the second valve 32 is connected to a shell-side inlet of the overfire air heater 14, and a shell-side outlet of the overfire air heater 14 is communicated with the outside; the second end of the heating valve 33 is connected to the heating apparatus.
As a possible example, after heat exchange is performed between the heat exchange medium in the compressor unit 21 and the heat generated by the compression work of the compressor unit 21, the heat exchange medium is input into the secondary air heater 14, a part of the air enters the boiler body 11 through the air preheater 13, another part of the air enters the secondary air heater 14 to exchange heat with the heat exchange medium, and the heat exchanged air enters the combustor 12 as secondary air, so as to improve the combustion efficiency of the boiler.
In some embodiments of the present application, the system further comprises an absorption chiller 31, wherein the tube-side outlet of the compressor string 21 is connected to the inlet of the absorption chiller 31; the outlet of the absorption chiller 31 is connected to a cooling device.
As a possible example, the heat exchange medium exchanges heat with heat generated by compression work of the compressor unit 21 in the compressor unit 21, and is input to the absorption refrigerator 31, so that cooling can be assisted during a cooling peak.
In some embodiments of the present application, the shell-side inlet of the expansion unit 27 is connected to the cool medium input line, and the shell-side outlet of the expansion unit 27 is connected to the cooling device.
In some embodiments of the present application, the system further comprises a cooling valve 34, wherein the tube side outlet of the compressor unit 21 is connected to a first end of the cooling valve 34; a second end of the cold supply valve 34 is connected to an inlet of the absorption chiller 31.
In the valley period of power utilization, the steam turbine 15 operates at low load, part of high-temperature and high-pressure main steam enters the small steam turbine 18 from the boiler to do work, the compressor unit 21 is driven to rotate, and clean air is pressurized and input to the energy storage unit to be liquefied and stored. In the peak period of power utilization, the vaporized high-pressure air drives the second generator 28 to generate power by acting in the expansion unit 27, so that the overall power generation amount of the system is increased, and the peak regulation capacity of the steam turbine 15 is improved. The expansion process in the air expansion unit 27 can generate expansion cold quantity, so that the cold quantity can be supplied to the outside, and meanwhile, the expanded clean air can also supply fresh air to the outside.
As a possible example of implementation, the process of compressing air in the compressor unit 21 generates compression heat, and the heating valve 33 can be opened, the second valve 32 and the cooling valve 34 can be closed, so that the heat exchange medium can assist the extraction steam of the steam turbine 15 to supply heat together during the heating peak; opening the cold supply valve 34, closing the second valve 32 and the heat supply valve 33, and exchanging heat through the absorption refrigerator 31 at the cold supply peak so as to generate cold quantity for assisting cold supply; the second valve 32 is opened, the heat supply valve 33 and the cold supply valve 34 are closed, and heat exchange is carried out through the secondary air heater 14 during non-heat supply and cold supply peaks, so that heat is transferred to secondary air, the temperature of the secondary air is further increased, and the combustion efficiency of the boiler is improved; the opening and closing and corresponding opening of any one or more of the second valve 32, the heating valve 33 and the cooling valve 34 can be adjusted according to the actual energy supply requirement, so that the compression heat generated in the compressor unit 21 can be converted simultaneously and the co-production and co-supply of various types of energy sources can be met.
According to the comprehensive energy supply system of coupling liquefied air energy storage and thermal power generation of this application embodiment, carry out energy storage through the liquefaction energy memory of air, take up an area of for a short time, green high-efficient, and longe-lived, with liquefaction energy memory and thermal power device coupling, can improve thermal power device's flexibility, in the power supply, can satisfy the multiple demands of cooling, heat supply, confession pure oxygen, confession pure nitrogen and confession new trend. In addition, in the electricity consumption valley period, the steam turbine runs at low load, part of high-temperature and high-pressure main steam enters the small steam turbine to do work, the compressor unit is driven to rotate, and clean air is pressurized and liquefied and stored; in the peak period of power utilization, the vaporized high-pressure air applies work through the expansion unit to generate power, so that the overall power generation amount of the system is increased, and the peak regulation capacity of the steam turbine is improved. In addition, the heat generated by the compressor unit and secondary air are subjected to heat exchange through the secondary air heater, the temperature of the secondary air is further improved, the stability of ignition during low-load operation is improved, and combustion is enhanced, so that the boiler efficiency is improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (9)
1. A comprehensive energy supply system for coupling liquefied air energy storage and thermal power generation is characterized by comprising a thermal power device and a liquefied energy storage device, wherein the thermal power device comprises a boiler, a steam turbine, a first generator and a small steam turbine, the liquefied energy storage device comprises an expansion unit, a compressor unit, an energy storage unit and a second generator, the energy storage unit comprises a cold accumulation heat regenerator, a liquid air storage tank and a gas-liquid separator,
the outlet of the boiler is respectively connected with the inlet of the steam turbine and the inlet of the small steam turbine;
the steam turbine is connected with the first generator shaft through a transmission shaft, and an outlet of the steam turbine is connected with the heat supply equipment through a pipeline;
the small steam turbine is connected with the compressor unit through a transmission shaft;
a shell side inlet of the compressor unit is connected with an air source, and a shell side outlet of the compressor unit is connected with a first inlet of the cold accumulation regenerator;
the first outlet of the cold accumulation heat regenerator is connected with the inlet of the gas-liquid separator, the liquid outlet of the gas-liquid separator is sequentially connected with the liquid air storage tank and the second inlet of the cold accumulation heat regenerator, the pure oxygen outlet of the gas-liquid separator is sequentially connected with the third inlet of the cold accumulation heat regenerator and the oxygen supply device, and the pure nitrogen outlet of the gas-liquid separator is sequentially connected with the fourth inlet of the cold accumulation heat regenerator and the nitrogen supply device;
and a second outlet of the cold accumulation heat regenerator is connected with a pipe side inlet of the expansion unit, a pipe side outlet of the expansion unit is connected with fresh air supply equipment through a pipeline, and the energy storage unit is connected with the second generator shaft through a transmission shaft.
2. The system of claim 1, wherein the boiler comprises a burner, a boiler body, the energy storage unit further comprises an oxygen supply valve, wherein,
the burner is mounted on the boiler body;
a third outlet of the cold accumulation heat regenerator is connected with the first end of the oxygen supply valve;
the second end of the oxygen supply valve is connected with the inlet of the burner; and the third outlet of the cold accumulation heat regenerator is arranged corresponding to the third inlet of the cold accumulation heat regenerator.
3. The system of claim 2, further comprising a heating valve, the boiler further comprising an air preheater, a overfire air heater, and a second valve, wherein,
the air preheater is installed inside an air inlet of the boiler body;
the outlet of the air preheater is sequentially connected with the tube side of the secondary air heater and the inlet of the burner through a pipeline;
a pipe side inlet of the compressor unit is connected with a heat exchange medium input pipeline;
a pipe side outlet of the compressor unit is respectively connected with a first end of the second valve and a first end of the heat supply valve;
the second end of the second valve is connected with a shell-side inlet of the secondary air heater, and a shell-side outlet of the secondary air heater is communicated with the outside;
and the second end of the heat supply valve is connected with the heat supply equipment.
4. The system of claim 1, further comprising an absorption chiller, wherein,
the outlet on the pipe side of the compressor unit is connected with the inlet of the absorption refrigerator;
and the outlet of the absorption refrigerator is connected with a cooling device.
5. The system of claim 4,
and a shell side inlet of the expansion unit is connected with a cold exchange medium input pipeline, and a shell side outlet of the expansion unit is connected with the cold supply equipment.
6. The system of claim 4, further comprising a cooling valve, wherein,
the pipe side outlet of the compressor unit is connected with the first end of the cold supply valve;
and the second end of the cold supply valve is connected with the inlet of the absorption refrigerator.
7. The system of claim 1, wherein the energy storage unit further comprises a throttle valve, wherein,
a first outlet of the cold accumulation heat regenerator is connected with a first end of the throttle valve;
the second end of the throttle valve is connected with the inlet of the gas-liquid separator.
8. The system of claim 1, wherein the energy storage unit further comprises a liquid pump, wherein,
the outlet of the liquid air storage tank is connected with the inlet of the liquid pump;
and the outlet of the liquid pump is connected with the second inlet of the cold accumulation heat regenerator.
9. The system of claim 1, wherein the thermal power plant further comprises a first valve, wherein,
the outlet of the boiler is connected with the first end of the first valve;
and the second end of the first valve is connected with the inlet of the small steam turbine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210764112.9A CN115075895A (en) | 2022-06-30 | 2022-06-30 | Integrated energy supply system for coupling liquefied air energy storage and thermal power generation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210764112.9A CN115075895A (en) | 2022-06-30 | 2022-06-30 | Integrated energy supply system for coupling liquefied air energy storage and thermal power generation |
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