CN212389392U - A liquid compressed air energy storage peak regulation system driven by a back pressure steam turbine - Google Patents
A liquid compressed air energy storage peak regulation system driven by a back pressure steam turbine Download PDFInfo
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- CN212389392U CN212389392U CN202022197086.5U CN202022197086U CN212389392U CN 212389392 U CN212389392 U CN 212389392U CN 202022197086 U CN202022197086 U CN 202022197086U CN 212389392 U CN212389392 U CN 212389392U
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- 239000007788 liquid Substances 0.000 title claims abstract description 51
- 238000004146 energy storage Methods 0.000 title claims abstract description 47
- 238000000926 separation method Methods 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 7
- 238000000605 extraction Methods 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 3
- 230000006837 decompression Effects 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
本实用新型公开了一种背压式汽轮机驱动的液态压缩空气储能调峰系统，将燃煤发电机组与液态压缩空气储能系统相耦合，液态压缩空气储能系统空气压缩机采用背压式小汽轮机驱动，小汽轮机进汽汽源取自机组热再蒸汽，排汽用于对外工业供汽。与热再蒸汽减温减压对外供汽相比，实现了对抽汽能量的合理梯级利用，避免了减温减压所造成的能量浪费。背压式小汽轮机驱动空气压缩机运转，完成液态压缩空气储能系统空气压缩过程，降低储能系统电耗。
The utility model discloses a liquid compressed air energy storage peak regulation system driven by a back pressure type steam turbine, which couples a coal-fired generator set with a liquid compressed air energy storage system, and the air compressor of the liquid compressed air energy storage system adopts a back pressure type. Driven by a small steam turbine, the steam inlet steam source of the small steam turbine is taken from the hot re-steam of the unit, and the exhaust steam is used for external industrial steam supply. Compared with the external steam supply of hot re-steam desuperheating and decompression, the reasonable cascade utilization of extraction steam energy is realized, and the energy waste caused by desuperheating and decompression is avoided. The back pressure small steam turbine drives the air compressor to operate, completes the air compression process of the liquid compressed air energy storage system, and reduces the power consumption of the energy storage system.
Description
[ technical field ] A method for producing a semiconductor device
The utility model belongs to the technical field of heat energy comprehensive utilization, a back pressure steam turbine driven liquid compressed air energy storage peak shaving system is related to.
[ background of the invention ]
In order to cope with the gradual depletion of fossil fuels and environmental problems caused by the depletion, power generation using renewable energy resources such as wind energy and solar energy has been rapidly developed in recent years. The renewable energy power generation large-scale grid connection with volatility and randomness puts higher requirements on peak clipping and valley filling, and safe and stable operation level of a power grid. The construction of large-scale energy storage devices improves the operation flexibility and safety of the power system, and is an effective way for solving the problem of high-proportion consumption of new energy.
At present, the large-scale energy storage technology mainly comprises pumped storage, compressed air storage and electrochemical storage. The pumped storage technology is mature and has high efficiency, but the site selection condition is severe and the construction period is long; the electrochemical energy storage has the problems of short service life, industrial pollution and the like; the compressed air energy storage technology has the characteristics of long service life, small environmental pollution, low operation and maintenance cost and the like, and has large-scale popularization and application potential. Especially, the liquid compressed air energy storage technology realizes the liquid storage of the compressed air by carrying out the cryogenic liquefaction on the air, greatly reduces the storage volume and greatly improves the energy storage density of the system. But the whole energy storage efficiency of the conventional liquid compressed air energy storage system is lower, and the operation cost is higher.
[ summary of the invention ]
An object of the utility model is to solve the problem among the prior art, provide a back pressure steam turbine driven liquid compressed air energy storage peak shaving system, the utility model discloses a coupling of coal-fired generating set and liquid compressed air energy storage system adopts the unit to extract the surplus pressure of vapour and drives the little steam turbine of back pressure, drives liquid compressed air energy storage system air compressor operation. The reasonable cascade utilization of the extraction energy is realized, the power consumption of the compressed air energy storage system is reduced, and the overall operation efficiency of the system is improved.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a liquid compressed air energy storage peak shaving system driven by a back pressure turbine comprising:
the high-pressure cylinder, the intermediate pressure cylinder and the low-pressure cylinder drive the first generator to generate electricity;
the liquid compressed air energy storage system comprises a back pressure turbine and at least one stage of air compressor, and a steam source of the back pressure turbine is reheated steam of a boiler; the back pressure turbine drives an air compressor, a compressed air outlet of the air compressor is connected with a refrigeration expander, an outlet of the refrigeration expander is connected with a gas-liquid separation device, a gas outlet of the gas-liquid separation device is connected with an inlet of the air compressor, and a liquid outlet of the gas-liquid separation device is connected with an air storage tank; the outlet of the air storage tank is connected with a booster pump, and the outlet of the booster pump is connected with at least one stage of air expander through at least one stage of air heater; the air expander drives a second generator to generate electricity.
The utility model discloses further improvement lies in:
the number of the air heaters and the number of the air expanders are the same.
The steam turbine set comprises a high-pressure cylinder, a steam outlet of the high-pressure cylinder is connected with an inlet of a reheater of the boiler, a reheated steam outlet is divided into two paths, one path is connected with a steam inlet of the intermediate pressure cylinder, the other path is connected with a steam inlet of the back pressure steam turbine, and the steam outlet of the intermediate pressure cylinder is connected with a steam inlet of the low-pressure cylinder.
And the outlet of the boiler reheater is connected with a back pressure turbine through a valve.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a coal-fired generating set and liquid compressed air energy storage power generation system's coupling realizes the reasonable step utilization of heat supply extraction steam energy, has avoided the direct desuperheating of extraction steam decompression external supply to cause the energy waste. Compare with conventional liquid compressed air energy storage system, the utility model discloses utilize the little steam turbine of steam residual pressure drive back pressure formula to drive air compressor operation, effectively reduced energy storage system power consumption. The overall operation efficiency of the coupling liquid compressed air energy storage system of the coal-fired generator set is improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of the thermodynamic system of the present invention.
Wherein: 1-boiler, 2-high pressure cylinder, 3-intermediate pressure cylinder, 4-low pressure cylinder, 5-first generator, 6-valve, 7-back pressure turbine, 8-air compressor, 9-refrigeration expander, 10-gas-liquid separation device, 11-air storage tank, 12-booster pump, 13-air heater, 14-air expander, 15-second generator.
[ detailed description ] embodiments
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings or the orientation or position relationship that the product of the present invention is usually placed when in use, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be interpreted as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the utility model discloses back pressure steam turbine driven liquid compressed air energy storage peak shaving system, including coal-fired generating set and liquid compressed air energy storage system.
The coal-fired power generating set comprises a boiler 1 and a steam turbine set, wherein the outlet of a reheater of the boiler 1 is divided into two paths, one path is connected with a middle pressure cylinder 3 for steam admission, the other path is connected with a liquid compressed air energy storage system, and a high pressure cylinder 2, the middle pressure cylinder 3 and a low pressure cylinder 4 drive a first power generator 5 to generate power; the steam turbine set comprises a high-pressure cylinder 2, a steam outlet of the high-pressure cylinder 2 is connected with a reheater inlet of a boiler 1, a reheated steam outlet is divided into two paths, one path is connected with a steam inlet of a middle-pressure cylinder 3, the other path is connected with a steam inlet of a back-pressure steam turbine 7, and a steam outlet of the middle-pressure cylinder 3 is connected with a steam inlet of a low-pressure cylinder 4. The outlet of the reheater of the boiler 1 is connected with a liquid compressed air energy storage system through a valve 6.
The liquid compressed air energy storage system comprises a back pressure turbine 7 and at least one air compressor 8, wherein a steam source of the back pressure turbine 7 is reheated steam of the boiler 1; the back pressure turbine 7 drives an air compressor 8, a compressed air outlet of the air compressor 8 is connected with a refrigeration expander 9, an outlet of the refrigeration expander 9 is connected with a gas-liquid separation device 10, a gas outlet of the gas-liquid separation device 10 is connected with an inlet of the air compressor 8, and a liquid outlet is connected with an air storage tank 11; the outlet of the air storage tank 11 is connected with a booster pump 12, and the outlet of the booster pump 12 is connected with at least one air expander 14 through at least one air heater 13; the air expander 14 drives a second generator 15 to generate electricity. The number of the air heaters 13 and the air expanders 14 is the same.
The utility model discloses a theory of operation:
when the liquid compressed air energy storage system operates in an energy storage mode, the valve 6 is opened, a part of reheated steam at the outlet of the boiler 1 enters the intermediate pressure cylinder 3 to do work through expansion, a part of reheated steam enters the back pressure turbine 7 through the valve 6 to drive the air compressor 8 to operate, and steam discharged by the back pressure turbine 7 is used for supplying steam to the external industry. High-pressure air at the outlet of the air compressor 8 enters a refrigeration expander 9, the air is expanded and released heat and then enters a gas-liquid separation device 10, liquid air is stored in an air storage tank 11, and separated gas air returns to the inlet of the air compressor 8 to be recompressed. And finishing the air compression energy storage process of the liquid compressed air energy storage system.
When the liquid compressed air energy storage system releases energy to generate electricity, liquid air at the outlet of the air storage tank 11 is boosted by the booster pump 12, enters the air heater 13 to be heated and heated, and then enters the air expander 14 to be expanded and do work to drive the second generator 15 to generate electricity. And finishing the energy releasing and power generating process of the liquid compressed air energy storage system.
The air compressor 8 may be one or more stages.
The air heater 13 and the air expander 14 may be one or more stages, and the number of the air heater 13 corresponds to the number of the air expander 14.
The utility model relates to a back pressure steam turbine driven liquid compressed air energy storage peak shaving system, with coal-fired generating set and liquid compressed air energy storage system looks coupling, liquid compressed air energy storage system air compressor adopts the little steam turbine drive of back pressure formula, and little steam turbine admission vapour source is got from unit heat steams, and the steam extraction is used for external industry steam supply. Compared with the external steam supply by reducing the temperature and the pressure of the hot re-steam, the reasonable cascade utilization of the steam extraction energy is realized, and the energy waste caused by reducing the temperature and the pressure is avoided. The back pressure type small steam turbine drives the air compressor to operate, the air compression process of the liquid compressed air energy storage system is completed, and the power consumption of the energy storage system is reduced.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A liquid compressed air energy storage peak shaving system driven by a back pressure turbine, comprising:
the system comprises a coal-fired generating set, wherein the coal-fired generating set comprises a boiler (1) and a steam turbine set, the steam inlet of a medium pressure cylinder (3) of the steam turbine set is connected with a liquid compressed air energy storage system, and a high pressure cylinder (2), the medium pressure cylinder (3) and a low pressure cylinder (4) drive a first generator (5) to generate electricity;
the liquid compressed air energy storage system comprises a back pressure turbine (7) and at least one stage of air compressor (8), wherein a steam source of the back pressure turbine (7) comes from reheated steam of the boiler (1); the back pressure turbine (7) drives an air compressor (8), a compressed air outlet of the air compressor (8) is connected with a refrigeration expander (9), an outlet of the refrigeration expander (9) is connected with a gas-liquid separation device (10), a gas outlet of the gas-liquid separation device (10) is connected with an inlet of the air compressor (8), and a liquid outlet is connected with an air storage tank (11); an outlet of the air storage tank (11) is connected with a booster pump (12), and an outlet of the booster pump (12) is connected with at least one stage of air expander (14) through at least one stage of air heater (13); the air expander (14) drives a second generator (15) to generate electricity.
2. A back pressure turbine driven liquid compressed air energy storage peaking system according to claim 1, characterized in that the number of air heaters (13) and air expanders (14) is the same.
3. The liquid compressed air energy storage and peak shaving system driven by the back pressure turbine as claimed in claim 1, wherein the turbine unit comprises a high pressure cylinder (2), the steam outlet of the high pressure cylinder (2) is connected with the inlet of the reheater of the boiler (1), the outlet of the reheated steam is divided into two paths, one path is connected with the steam inlet of the intermediate pressure cylinder (3), the other path is connected with the steam inlet of the back pressure turbine (7), and the steam outlet of the intermediate pressure cylinder (3) is connected with the steam inlet of the low pressure cylinder (4).
4. A back pressure turbine driven liquid compressed air energy storage peaking system according to claim 2 or 3, characterized in that the boiler (1) reheater outlet is connected to the back pressure turbine (7) through a valve (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022197086.5U CN212389392U (en) | 2020-09-29 | 2020-09-29 | A liquid compressed air energy storage peak regulation system driven by a back pressure steam turbine |
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| CN202022197086.5U CN212389392U (en) | 2020-09-29 | 2020-09-29 | A liquid compressed air energy storage peak regulation system driven by a back pressure steam turbine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202586A (en) * | 2021-06-09 | 2021-08-03 | 中国科学院理化技术研究所 | Liquid air energy storage power generation system jointly operated with thermal power plant |
| CN114109543A (en) * | 2021-11-09 | 2022-03-01 | 西安热工研究院有限公司 | Liquid compressed air energy storage method and system utilizing steam turbine bypass for heat supplement |
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- 2020-09-29 CN CN202022197086.5U patent/CN212389392U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113202586A (en) * | 2021-06-09 | 2021-08-03 | 中国科学院理化技术研究所 | Liquid air energy storage power generation system jointly operated with thermal power plant |
| CN114109543A (en) * | 2021-11-09 | 2022-03-01 | 西安热工研究院有限公司 | Liquid compressed air energy storage method and system utilizing steam turbine bypass for heat supplement |
| CN114109543B (en) * | 2021-11-09 | 2024-01-19 | 西安热工研究院有限公司 | Liquid compressed air energy storage method and system utilizing bypass heat supplement of steam turbine |
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