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CN-224230804-U - Pressurized storage power station heat storage system of public heat storage medium circulating pump

CN224230804UCN 224230804 UCN224230804 UCN 224230804UCN-224230804-U

Abstract

The utility model discloses a pressure storage power station heat storage system of a public heat storage medium circulating pump, and relates to the technical field of non-afterburning type compressed air energy storage power station heat storage systems. The high-temperature storage tank is connected with an inlet main pipe of the circulating pump, the low-temperature storage tank is connected with an inlet main pipe of the circulating pump, the inlet main pipe of the circulating pump is connected with the common circulating pump, the common circulating pump is connected with an outlet main pipe of the circulating pump, and an outlet main pipe of the circulating pump is connected with the high-temperature storage tank through a high Wen Muguan and is connected with the low-temperature storage tank through a low-temperature main pipe. The utility model adopts the public circulating pump, can obviously reduce the configuration quantity of the heat storage medium circulating pumps in the heat storage system, optimize the system configuration and reduce the occupied area of pump rooms, thereby effectively reducing the construction cost of a power station.

Inventors

  • HAN LIANG
  • WANG AO
  • XUE FU
  • LIU FANGQI
  • ZHANG KAI
  • RUAN GANG
  • DUAN QUANPENG
  • LI XIN

Assignees

  • 中国电力工程顾问集团中南电力设计院有限公司

Dates

Publication Date
20260512
Application Date
20250513

Claims (9)

  1. 1. The pressure storage power station heat storage system of the public heat storage medium circulating pump is characterized by comprising a high-temperature storage tank (100), a low-temperature storage tank (200) and a public circulating pump (300); The high-temperature storage tank (100) is connected with a circulating pump inlet main pipe (410) through a high-temperature side circulating pump inlet main pipe (420), the low-temperature storage tank (200) is connected with a circulating pump inlet main pipe (410) through a low-temperature side circulating pump inlet main pipe (430), and the circulating pump inlet main pipe (410) is connected with a public circulating pump (300); The public circulating pump (300) is connected with a circulating pump outlet main pipe (440), and the circulating pump outlet main pipe (440) is connected with the high-temperature storage tank (100) through a high Wen Muguan (450) and is connected with the low-temperature storage tank (200) through a low Wen Muguan (460); The high-temperature main pipe (450) is connected with a compression side heat exchanger (510), and the low Wen Muguan (460) is connected with an expansion side heat exchanger (520).
  2. 2. The heat storage system of a pressurized storage power station of a public heat storage medium circulating pump according to claim 1, wherein the high-temperature storage tank (100) is connected with a high-temperature side circulating pump inlet main pipe (420) through a high-temperature storage tank inlet and outlet shutoff valve (110), and the high-temperature side circulating pump inlet main pipe (420) is provided with a high-temperature side circulating pump inlet main pipe shutoff valve (421); The low-temperature storage tank (200) is connected with a low-temperature side circulating pump inlet main pipe (430) through a low-temperature storage tank inlet and outlet shutoff valve (210), and the low-temperature side circulating pump inlet main pipe (430) is provided with a low-temperature side circulating pump inlet main pipe shutoff valve (431); A circulating pump inlet shutoff valve (411) is arranged on the circulating pump inlet main pipe (410), and a circulating pump outlet shutoff valve (441) is arranged on the circulating pump outlet main pipe (440); The inlet of the high-temperature main pipe (450) is provided with a high Wen Muguan inlet shutoff valve (451), the outlet of the high-temperature main pipe is provided with a high Wen Muguan outlet shutoff valve (452), the inlet of the low Wen Muguan (460) is provided with a low Wen Muguan inlet shutoff valve (461), and the outlet of the high-temperature main pipe is provided with a low-temperature main pipe outlet shutoff valve (462).
  3. 3. The heat storage system of a pressurized storage station of a public heat storage medium circulating pump according to claim 2, further comprising a circulating pump minimum flow recirculation pipeline (600), wherein an inlet of the circulating pump minimum flow recirculation pipeline (600) is connected with a circulating pump outlet main pipe (440), an outlet of the circulating pump minimum flow recirculation pipeline (600) is connected with a circulating pump inlet main pipe (410), and a circulating pump minimum flow recirculation pipeline inlet shutoff valve (610), a circulating pump minimum flow recirculation pipeline regulating valve (620) and a circulating pump minimum flow recirculation pipeline outlet shutoff valve (630) are sequentially arranged from the inlet to the outlet.
  4. 4. The heat storage system of a pressurized storage station of a public heat storage medium circulating pump according to claim 2, further comprising a compression side start-up recirculation pipeline (700), wherein an inlet of the compression side start-up recirculation pipeline (700) is connected with a high temperature main pipe (450), a connection is positioned between a high Wen Muguan outlet shutoff valve (452) and a compression side heat exchanger (510), and an outlet of the compression side start-up recirculation pipeline (700) is connected with a low temperature storage tank (200).
  5. 5. A pressurized storage plant heat storage system of a utility heat storage medium circulating pump as described in claim 4 wherein said compression side activated recirculation line (700) is provided with a compression side activated recirculation line inlet shutoff valve (710) at the inlet and a compression side activated recirculation line outlet shutoff valve (720) at the outlet.
  6. 6. A pressurized storage plant heat storage system with a common heat storage medium circulation pump according to claim 2 further comprising an expansion side start-up recirculation line (800), wherein the inlet of the expansion side start-up recirculation line (800) is connected to the low Wen Muguan (460) at a connection between the cryogenic main outlet shutoff valve (462) and the expansion side heat exchanger (520), and the outlet of the expansion side start-up recirculation line (800) is connected to the circulation pump inlet main (410).
  7. 7. A pressurized storage plant heat storage system of a common heat storage medium circulating pump as described in claim 6 wherein said expansion side activated recirculation line (800) is provided with an expansion side activated recirculation line shut-off valve (810).
  8. 8. The heat storage system of a pressurized storage power station of a public heat storage medium circulating pump as set forth in claim 2, wherein a check valve (470) and a regulating valve (480) are disposed on both the high temperature main pipe (450) and the low Wen Muguan (460).
  9. 9. A pressurized storage station heat storage system of a common heat storage medium circulation pump as defined in claim 1 wherein: When the time length of the compression energy storage phase is equal to the time length of the expansion power generation phase, the common circulating pump (300) is configured by adopting 2 multiplied by 100 percent capacity or 3 multiplied by 50 percent capacity, and the common circulating pump (300) operates according to a 1-operation 1-standby mode or a 2-operation 1-standby mode in the compression energy storage phase and the expansion power generation phase; When the ratio of the duration of the compression energy storage stage to the duration of the expansion power generation stage is 2:1, the common circulating pump (300) adopts 3X 50% capacity configuration, the common circulating pump (300) operates according to a 1-operation 2-standby mode in the compression energy storage stage, and the common circulating pump (300) operates according to the 2-operation 1-standby mode in the expansion power generation stage; When the ratio of the duration of the compression energy storage phase to the duration of the expansion power generation phase is 3:2, the common circulating pump (300) adopts 4 multiplied by 33% capacity configuration, the common circulating pump (300) operates according to a 2-operation 2-standby mode in the compression energy storage phase, and the common circulating pump (300) operates according to a 3-operation 1-standby mode in the expansion power generation phase.

Description

Pressurized storage power station heat storage system of public heat storage medium circulating pump Technical Field The utility model relates to the technical field of heat storage systems of non-afterburning type compressed air energy storage power stations, in particular to a heat storage system of a compressed air energy storage power station of a public heat storage medium circulating pump. Background The non-post combustion type compressed air energy storage system is also called an advanced compressed air energy storage system, which stores heat generated by compressed air of a compressor in a heat storage device through water, heat conduction oil, molten salt or other heat storage medium, then transfers the stored heat to turbine inlet air through a heat exchanger in an energy release stage, and further improves the output work of a turbine. Compared with the traditional post-combustion type compressed air energy storage system, the advanced adiabatic compressed air energy storage system does not need to consume fuel, has no post-combustion link, has the advantages of environmental friendliness, no pollution and the like, is more in line with the current development requirements of green, environment protection and low carbon, is highly valued in China and rapidly developed gradually, a non-post-combustion type system compressed air energy storage power station adopting water, heat conducting oil or molten salt as a heat storage medium generally stores a high-temperature heat storage medium after absorbing heat in a high-temperature storage tank, and a low-temperature heat storage medium after releasing heat is stored in a low-temperature storage tank, and the system utilizes a heat exchanger to extract and store compression heat to heat turbine air instead of fuel, dissipates the compression heat instead of a cooler, so that the system efficiency can be greatly improved. At present, a non-afterburning type compressed air energy storage power station heat storage system generally adopts the following scheme that in an energy storage stage, low-temperature heat storage media of a low-temperature storage tank are pressurized through a low-temperature circulating pump and then flow through a compression side heat exchanger to absorb heat of air at an outlet of a compressor, heated and warmed high-temperature heat storage media flow into the high-temperature storage tank, in an energy release stage, the high-temperature heat storage media of the high-temperature storage tank flow through an expansion side heat exchanger to heat turbine inlet air after being pressurized through the high-temperature circulating pump, cooled and cooled low-temperature heat storage media flow into the low-temperature storage tank, and meanwhile, in order to ensure that the outlet flow of the circulating pump is above the minimum allowable flow in a starting and low-load stage, the high-temperature circulating pump and the low-temperature circulating pump are respectively provided with a minimum flow recirculation bypass pipeline. According to the scheme of the conventional non-afterburning compressed air energy storage power station heat storage system, the high-temperature circulating pump, the low-temperature circulating pump and the corresponding minimum flow recirculation bypass are required to be respectively configured, certain redundancy is required to be considered in consideration of the fact that the circulating pump is key equipment for guaranteeing stable operation of the power station, 3 circulating pumps with 50% capacity or 2 circulating pumps with 100% capacity can be selected according to the capacity of a unit, and therefore when the scheme of the conventional heat storage system is adopted, the high-temperature circulating pump and the low-temperature circulating pump are more in number and complex in system, so that the occupied area of a pump room of the heat storage system is large, the cost is high and the operation is complex. Therefore, under the premise of fully guaranteeing the stable operation of the compressed air energy storage power station, the development of the compressed air energy storage power station heat storage system for the public heat storage medium circulating pump has the advantages of effectively reducing the quantity of the heat storage medium circulating pumps, reducing the investment of the circulating pumps and auxiliary facilities thereof, simplifying the system operation, optimizing the pipeline system and having good economic benefit. Disclosure of utility model The utility model aims to solve the problems of equipment redundancy, low system integration level, large investment, large occupied area of pump rooms and complex operation caused by independent arrangement of high-temperature and low-temperature circulating pumps of the conventional compressed air energy storage power station heat storage system, and provides a pressurized storage power station heat storage syst