CN211924265U - Stirling refrigeration cold-storage system of thermal power plant - Google Patents
Stirling refrigeration cold-storage system of thermal power plant Download PDFInfo
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- CN211924265U CN211924265U CN201922480997.6U CN201922480997U CN211924265U CN 211924265 U CN211924265 U CN 211924265U CN 201922480997 U CN201922480997 U CN 201922480997U CN 211924265 U CN211924265 U CN 211924265U
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Abstract
The utility model discloses a Stirling refrigeration cold-storage system of a thermal power plant, which comprises a power plant power generation module, wherein the power plant power generation module is provided with a pulverized coal boiler, a steam turbine and a generator which are connected with each other, and also comprises a power transmission and supply module and a Stirling refrigerator which are connected with each other; the cold energy produced by the Stirling electric refrigerator is sent into the cold accumulation device for cold accumulation. The Stirling electric refrigerator is arranged in the thermal power plant, and the surplus electric power of the thermal power plant with flexibility peak shaving is utilized to refrigerate, store cold and store energy; meanwhile, the circulating water of the condenser of the thermal power plant can be deeply cooled, the vacuum degree of the condenser of the thermal power plant in summer is improved, and the operation efficiency of the thermal power generating unit in summer can be greatly improved.
Description
Technical Field
The application relates to the technical field of Stirling refrigerators, in particular to a refrigerating and cold-storage system of a Stirling electric refrigerator in a thermal power plant.
Background
Generally, 120K is the dividing point between normal cooling (refrigeration) and cryogenic cooling (low temperature), below 120K is called cryogenic cooling (low temperature) technology, above 120K is called normal cooling (refrigeration) technology. Since the last 90 s, stirling refrigeration systems for commercial refrigeration (refrigeration temperatures above 120K) have been proposed and developed by stirling technology research institutes at home and abroad, the major research institutes of which include Sunpower corporation, infinia (stc) corporation, YUIST corporation, french electric power corporation, Twinbird corporation, Global cooling corporation, west university, chinese academy of sciences, and shanghai university, in the united states.
The integral Stirling refrigerating machine driven by the crank connecting rod mechanism in the Stirling refrigerating machine has the characteristics of high efficiency, high cooling rate, compact structure, wide refrigerating temperature range and the like, the refrigerating power range can cover to kilowatt level, the technology is mature, the cost is low, but lubricating oil required by a moving part of the integral Stirling refrigerating machine pollutes working media and influences the refrigerating performance. The large-capacity Stirling refrigerator is usually applied to low-temperature liquefaction occasions. The free piston type Stirling refrigerator avoids larger vibration and working medium pollution due to the change of the driving mode, but the technology is not mature, and the cost is higher, so the practical application in the large-cold-quantity occasion is still limited. Therefore, the Stirling refrigerating machine driven by the crank connecting rod has a good development prospect in large-capacity application occasions due to the advantages of outstanding refrigerating performance, manufacturing process cost and the like.
The Stirling refrigeration is greatly different from the traditional vapor compression throttling refrigeration, and the Stirling refrigeration technology generally adopts an integral Stirling refrigerator as a cold source and adopts helium expansion refrigeration as a principle, so that a throttling system and an evaporator are not needed. Compared with the traditional vapor compression throttling refrigeration system, the Stirling refrigeration system has the characteristics of high efficiency, green refrigerant, wide refrigeration temperature area and the like, and has obvious advantages in the aspects of environmental protection and energy conservation.
In addition, with the annual increase of the installed capacity of renewable energy power generation, in coastal areas in south China, especially in Fujian areas, due to the fact that many offshore wind power projects are built, the situation that the peak-load and frequency-modulation are difficult occurs in power grids in Fujian provinces. If the characteristic that the Stirling refrigerator can refrigerate rapidly at low temperature can be utilized, the peak-shaving frequency-modulation power is utilized to refrigerate, store cold and store energy in a thermal power plant, and the problem of peak-shaving frequency modulation of a power grid in the south of the future can be solved.
Disclosure of Invention
The problem that this application will be solved is: the heat-engine plant is combined with refrigeration and cold accumulation, and the problem that power grids and peak shaving frequency modulation are difficult in the prior art is solved.
In order to solve the technical problem, the following technical scheme is adopted in the application:
a Stirling refrigeration cold-storage system of a thermal power plant comprises a power plant power generation module, a power transmission and power supply module and a Stirling electric refrigerator, wherein the power plant power generation module is provided with a pulverized coal boiler, a steam turbine and a generator, and the power transmission and power supply module, the power plant power generation module and the Stirling electric refrigerator are mutually connected; the cold energy produced by the Stirling electric refrigerator is sent into the cold accumulation device for cold accumulation.
Furthermore, the system is also provided with a peak regulation control platform, and the peak regulation control platform controls the increase or decrease of the power consumption of the Stirling electric refrigerator and the cold storage capacity of the cold storage device through the power transmission and transformation and power supply module so as to respond to the peak regulation and frequency regulation load demand of the power grid on the thermal power plant.
Further, the Stirling electric refrigerator comprises an electric compressor and a compressor piston, an expander and an expander piston and a heat regenerator.
Further, the Stirling electric refrigerator is any one of a crank-connecting rod driving type refrigerator, a free piston type refrigerator, an integrated refrigerator, a split refrigerator, a single-stage refrigerator and a multi-stage refrigerator.
Further, the cold storage device is any one of an ice cold storage device, a water cold storage device and a liquefied air cold storage device.
Furthermore, the cold accumulation device is connected with a circulating water cooling pipeline of a condenser of a thermal power plant, and the cooling circulating water of the cold accumulation device is used for indirectly cooling the exhaust steam of a steam turbine in the condenser.
Furthermore, the cold accumulation device is a liquefied air cold accumulation device and is used for separating air, and the separated oxygen is connected with an oxygen-enriched combustion system of a boiler of a thermal power plant so as to meet the requirement of oxygen supply of an oxygen-enriched combustor.
Furthermore, the cold accumulation device is connected with a refrigeration air-conditioning system and a regional refrigeration system of the thermal power plant.
Further, the cold accumulation device is used for providing cold energy for the refrigeration house.
Further, the cold accumulation device is used for making ice or dry ice.
The beneficial effect of this application:
(1) according to the method, a Stirling electric refrigerator is arranged in a thermal power plant, surplus power of the thermal power plant in flexible peak shaving is utilized, wind is abandoned, light is abandoned, water is abandoned, and nuclear power is abandoned in a phase-changing mode to perform refrigeration, cold accumulation and energy storage of the Stirling electric refrigerator;
(2) according to the method, the Stirling refrigerator and the cold accumulation device are utilized to deeply cool the circulating water of the condenser of the thermal power plant, so that the vacuum degree of the condenser of the thermal power plant in summer is improved, and the operation efficiency of the thermal power unit in summer can be greatly improved;
(3) according to the method, peak-shaving frequency modulation cheap electric power is utilized, the cold accumulation of liquefied air and the separation of the liquefied air can be realized at low cost, high-purity nitrogen, oxygen or argon is prepared, and the operation economy of a thermal power plant is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 is a schematic diagram of a stirling refrigeration cold storage system of a thermal power plant according to embodiment 1 of the present application;
fig. 2 is a schematic diagram of a stirling refrigeration cold storage system of a thermal power plant according to embodiment 2 of the present application;
fig. 3 is a schematic diagram of a stirling refrigeration cold accumulation system of a thermal power plant according to embodiment 3 of the present application.
Description of the reference numerals
The system comprises a peak regulation control platform-1, a power grid dispatching center-101, a power plant centralized control center-102, a power transmission and transformation and power supply module-2, a power plant power generation module-3, a steam turbine-301, a generator-302, a pulverized coal boiler-303, a high-pressure heater-304, a low-pressure heater-305, a deaerator-306, a condenser-307, a water pump-308, a booster station-309, a Stirling electric refrigerator-4 and a cold accumulation device-5.
Detailed Description
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Example 1
As shown in fig. 1, a stirling refrigeration cold-storage system of thermal power plant, including power plant's power generation module 3, send and become electricity and power module 2, peak regulation control platform 1, stirling electric refrigerator 4 and cold-storage device 5, send and become electricity and power module 2 and link to each other with peak regulation control platform 1, stirling electric refrigerator 4 and power plant's power module 3 respectively, peak regulation control platform 1 links to each other with sending and become electricity and power module 2, power plant's power module 3, stirling electric refrigerator 4 respectively, stirling electric refrigerator 4 links to each other with cold-storage device 5 for carry out the cold-storage with the cold energy that stirling electric refrigerator 4 produced.
The peak regulation control platform 1 is formed by connecting a power grid dispatching center 101 and a power plant centralized control center 102. As an example of the present invention, the power transmission and supply module 2 includes an inverter and an electric switch. The electric switch in the power transmission, transformation and power supply module 2 is connected with a bus at the outlet of the generator 302 of the thermal power plant, or connected with a high-voltage bus behind the booster station 309, or connected with a variable bus of the thermal power plant in the thermal power plant, so that the power consumption requirements of the Stirling electric refrigerator 4 and the cold accumulation device 5 are met. For example, one end of the electric switch is connected to the generator 302 and the booster 309, and the other end of the electric switch is connected to the inverter. The power grid dispatching center 101 issues a peak regulation instruction to the power plant centralized control center 102 according to the market demand change, and the power plant centralized control center 102 issues a power supply instruction to the power transmission, transformation and power supply module 2; after receiving the power supply instruction, the power transmission and transformation and power supply module 2 adjusts the opening and closing of the electric switch 202 in real time, and adjusts the generated energy of the power plant power generation module 3 and the power consumption of the Stirling electric refrigerator 4 and the cold accumulation device 5 so as to respond to the peak regulation requirement of the power grid.
The power plant power generation module 3 comprises a condenser 307, a low-pressure heater 305, a deaerator 306, a water pump 308, a high-pressure heater 304, a pulverized coal boiler 303 and a steam turbine 301 which are connected in sequence, the power plant power generation module 3 further comprises a generator 302 and a booster station 309, and the generator 302 is connected with the steam turbine 301 and the booster station 309 respectively. During the power generation of power plant, the water passes through water pump 308 and pumps high pressure feed water heater 304 and preheats, and the water after preheating gets into pulverized coal boiler 303 in the operation in order to produce high-pressure steam, and in high-pressure steam got into steam turbine 301, turn into kinetic energy with high-pressure steam's heat energy, and then drive generator 302 and produce the electric energy, merge into the national grid after stepping up through booster station 309. The exhaust steam of the steam turbine 301 can enter a condenser 307 or a deaerator 306; when the exhaust steam enters the condenser 307 and is liquefied into water, the water is primarily heated by the low-pressure heater 305, is treated by the deaerator 306 and then returns to the high-pressure heater 304 by the water pump 308 for recycling. Preferably, the low-pressure heater 305 and the high-pressure heater 304 can both heat the water body by the steam discharged by the steam turbine 301.
The stirling electric refrigerator 4 comprises an electric compressor and a compressor piston, an expander and an expander piston and a heat regenerator, and the connection relationship among the components is the prior art and is not described again. The Stirling electric refrigerator 4 can be any one of a crank-connecting rod driving type, a free piston type, an integral type, a split type, a single-stage type or a multi-stage type. Preferably, the stirling cryocooler 4 is of a crank-link drive type.
The cold storage device 5 can be set as required, and can be any one of an ice cold storage device, a water cold storage device and a liquefied air cold storage device. As an example of the present invention, the cold storage device 5 is connected to the circulating water cooling pipeline of the condenser 307 of the thermal power plant, and the cooling circulating water of the cold storage device 5 is used to indirectly cool the steam exhaust of the steam turbine 301 in the condenser 307. Preferably, the cold storage device 5 is a liquefied air cold storage device, and can be used for separating air, and the separated oxygen can be conveyed into an oxygen-enriched combustion system of the pulverized coal boiler 303 of the thermal power plant, so as to meet the oxygen supply of an oxygen-enriched combustor. The cold accumulation device 5 can be connected with a refrigeration air-conditioning system and a regional refrigeration system of a thermal power plant, can also be used for providing cold energy for a refrigeration house, or can be used for making ice or preparing dry ice.
After receiving the peak regulation instruction, the peak regulation control platform 1 can adjust the load of the pulverized coal boiler 303 or the steam turbine 301 to reduce the generated energy of the power generation module 3 of the power plant to regulate the peak correspondingly; or through the opening degree of an electric switch of the power transmission and transformation and power supply module 2, part of electric energy is transmitted to the Stirling electric refrigerator 4 and the refrigerating device 5 to increase the power consumption of at least one of the Stirling electric refrigerator and the refrigerating device to reduce the electric quantity merged into the national power grid through the booster station 309. The Stirling electric refrigerator 4 adjusts the operation load according to the peak regulation requirement, the generated cold energy can enter the cold accumulation device 5 for temporary storage, or indirectly cool the exhaust steam of the steam turbine 301 in the condenser 307 through the cooling circulating water of the cold accumulation device 5, or connect the refrigeration air conditioning system and the regional refrigeration system through the cold accumulation device 5 for temperature regulation.
Example 2
As shown in fig. 2, a stirling refrigeration cold-storage system of thermal power plant, including power plant's power generation module 3, send and become electricity and power module 2, peak regulation control platform 1, stirling electric refrigerator 4 and cold-storage device 5, send and become electricity and power module 2 and link to each other with peak regulation control platform 1, stirling electric refrigerator 4 respectively, peak regulation control platform 1 links to each other with sending and become electricity and power module 2, power plant's power generation module 3, stirling electric refrigerator 4 respectively, stirling electric refrigerator 4 links to each other with cold-storage device 5. The cold storage device 5 is a water cold storage device, the water cold storage device is connected with a circulating water cooling pipeline of the condenser 307, and the cooling circulating water of the cold storage device 5 is used for indirectly cooling the exhaust steam of the steam turbine 301 in the condenser 307, so that the generating efficiency of the unit is improved when the power on the internet needs to be increased. The water cold storage device can also be replaced by an ice cold storage device.
Example 3
As shown in fig. 3, a stirling refrigeration cold-storage system of thermal power plant, including power plant's power generation module 3, send and become electricity and power module 2, peak regulation control platform 1, stirling electric refrigerator 4 and cold-storage device 5, send and become electricity and power module 2 and link to each other with peak regulation control platform 1, stirling electric refrigerator 4 respectively, peak regulation control platform 1 links to each other with sending and become electricity and power module 2, power plant's power generation module 3, stirling electric refrigerator 4 respectively, stirling electric refrigerator 4 links to each other with cold-storage device 5. The cold accumulation device 5 is a liquefied air cold accumulation device, the liquefied air after cold accumulation enters an air separation device, nitrogen, oxygen and argon are obtained after separation, and the oxygen can be conveyed into an oxygen-enriched combustion system of the pulverized coal boiler 303; when the grid electricity quantity needs to be increased, the combustion efficiency of the pulverized coal boiler 303 is improved, and therefore the generated energy of the power generation module 3 of the power plant is improved. The nitrogen and the argon can be sold for the outside. The cold energy stored in the cold storage device 5 can also be used for making ice or dry ice and selling the ice or dry ice to the outside. As another example of the present invention, a large-sized cryogenic refrigerator is provided in the thermal power plant, and the cold storage device 5 is connected to the cryogenic refrigerator, so as to satisfy the refrigeration requirements of fishery seafood, fruits and vegetables.
Although the present application is disclosed above, the present application is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present disclosure, and it is intended that the scope of the present disclosure be defined by the appended claims.
Claims (10)
1. A Stirling refrigeration cold storage system of a thermal power plant comprises a power plant power generation module (3), wherein the power plant power generation module (3) is provided with a pulverized coal boiler (303), a steam turbine (301) and a generator (302) which are connected with each other, and is characterized by further comprising a power transmission and power supply module (2) and a Stirling electric refrigerator (4), wherein the power transmission and power supply module (2), the power plant power generation module (3) and the Stirling electric refrigerator (4) are connected with each other; the cold energy produced by the Stirling electric refrigerator (4) is sent into the cold accumulation device (5) for cold accumulation.
2. The Stirling refrigeration cold-storage system of the thermal power plant as claimed in claim 1, wherein the system is further provided with a peak regulation control platform (1), and the peak regulation control platform (1) controls the power consumption of the Stirling electric refrigerator (4) and the increase or decrease of the cold storage capacity of the cold storage device (5) through the power transmission and transformation and power supply module (2) so as to respond to the peak regulation and frequency regulation load demand of the power grid on the thermal power plant.
3. A stirling refrigeration cold storage system according to claim 1, wherein the stirling electric refrigerator (4) comprises an electric compressor and compressor piston, an expander and expander piston and a regenerator.
4. The stirling refrigeration cold accumulation system of the thermal power plant as claimed in claim 1, wherein the stirling electric refrigerator (4) is any one of crank-connecting rod driven, free piston, monolithic, split, single-stage or multi-stage.
5. The stirling refrigeration cold accumulation system of the thermal power plant according to claim 1, wherein the cold accumulation device (5) is any one of an ice cold accumulation device, a water cold accumulation device and a liquefied air cold accumulation device.
6. The stirling refrigeration cold accumulation system of the thermal power plant according to claim 1, wherein the cold accumulation device (5) is connected with a circulating water cooling pipeline of a condenser (307) of the thermal power plant, and the cooling circulating water of the cold accumulation device (5) is used for indirectly cooling the exhaust steam of the steam turbine (301) in the condenser (307).
7. The Stirling refrigeration cold accumulation system for the thermal power plant as claimed in claim 5, wherein the cold accumulation device (5) is a liquefied air cold accumulation device and is used for separating air, and separated oxygen is connected with an oxygen-enriched combustion system of a boiler of the thermal power plant to meet the oxygen supply of an oxygen-enriched combustor.
8. The stirling refrigeration cold accumulation system of the thermal power plant according to claim 1 or 5, wherein the cold accumulation device (5) is connected with a refrigeration air-conditioning system and a regional refrigeration system of the thermal power plant.
9. The stirling refrigeration cold accumulation system of thermal power plant according to claim 1, wherein the cold accumulation device (5) is used for providing cold energy for a cold storage.
10. The stirling refrigeration cold accumulation system of thermal power plant according to claim 1, wherein the cold accumulation device (5) is used for making ice or dry ice.
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| CN201922480997.6U CN211924265U (en) | 2019-12-31 | 2019-12-31 | Stirling refrigeration cold-storage system of thermal power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914951A (en) * | 2021-10-15 | 2022-01-11 | 西安热工研究院有限公司 | Nuclear power plant peak regulation system based on compressed air energy storage and operation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113914951A (en) * | 2021-10-15 | 2022-01-11 | 西安热工研究院有限公司 | Nuclear power plant peak regulation system based on compressed air energy storage and operation method |
| CN113914951B (en) * | 2021-10-15 | 2024-01-19 | 西安热工研究院有限公司 | Nuclear power plant peak shaving system based on compressed air energy storage and operation method |
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Address after: 100176 Room 201, 2 / F, building 12, yard 18, Kechuang 13th Street, economic and Technological Development Zone, Daxing District, Beijing Patentee after: HEPP Energy Environment Technology Co.,Ltd. Address before: 100176 No. 12 building, 18 Chuang thirteen street, Daxing District economic and Technological Development Zone, Beijing Patentee before: Hep Energy and Environment Technology Co.,Ltd. |
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