CN-121977290-A - Heat supply system, heat supply method and equipment based on chemical chain electricity storage

CN121977290ACN 121977290 ACN121977290 ACN 121977290ACN-121977290-A

Abstract

The application discloses a heat supply system, a heat supply method and equipment based on chemical chain electricity storage, wherein the heat supply system comprises an energy storage unit and an energy release unit which realize energy coupling through a metal oxygen carrier exchange system, the energy storage unit comprises a heat pump assembly, a reduction reactor and a first heat exchange assembly, the heat pump assembly and the reduction reactor are both connected with the first heat exchange assembly, water flowing through the heat pump assembly exchanges heat with oxygen discharged by the reduction reactor through the first heat exchange assembly, the energy release unit comprises an oxidation reactor and a second heat exchange assembly, the oxidation reactor is connected with the second heat exchange assembly, and water flowing into the second heat exchange assembly exchanges heat with flue gas discharged by the oxidation reactor. The application combines the chemical chain electricity storage technology with the heat supply system, utilizes the reduction reactor to convert the electric energy into high-density chemical energy and store the high-density chemical energy in the metal oxygen carrier in the green electricity sufficient period, and utilizes the oxidation reactor to release the chemical energy stored in the metal oxygen carrier in the green electricity insufficient period for producing hot water or steam. The system realizes space-time conversion and flexible scheduling between electric energy, chemical energy and heat energy, thereby improving comprehensive utilization efficiency of energy and heat supply reliability and reducing operation cost.

Inventors

ZHENG YAWEN
TENG WEI
Wen Qiaoyun
QIAO LIANG
JIANG PENG
FAN JUNMING
DUAN PENGFEI
GUAN XU
WU JUNQIN
LIU WEI

Assignees

赣州市华安能源技术有限公司
深圳市燃气集团股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260123

Claims (10)

1. The heat supply system based on chemical chain electricity storage is characterized by comprising an energy storage unit and an energy release unit; The energy storage unit comprises a heat pump assembly, a reduction reactor and a first heat exchange assembly, wherein the heat pump assembly and the reduction reactor are both connected with the first heat exchange assembly, and water flowing through the heat pump assembly exchanges heat with oxygen discharged by the reduction reactor through the first heat exchange assembly; the energy release unit comprises an oxidation reactor and a second heat exchange assembly, the oxidation reactor is connected with the second heat exchange assembly, and water flowing into the second heat exchange assembly exchanges heat with flue gas discharged by the oxidation reactor; The energy storage unit and the energy release unit are provided with a metal oxygen carrier exchange system therebetween, the metal oxygen carrier generated by the reduction reactor is interacted to the oxidation reactor through the metal oxygen carrier exchange system, and the oxidation-state metal oxygen carrier generated by the oxidation reactor is interacted to the reduction reactor through the metal oxygen carrier exchange system.
2. The chemical looping electricity storage based heating system of claim 1, wherein the energy storage unit includes a third heat exchange assembly positioned between a condenser and a compressor in the heat pump assembly and connected to the first heat exchange assembly, oxygen discharged from the reduction reactor passing through the first heat exchange assembly and entering the third heat exchange assembly where it exchanges heat with a refrigerant to be flowed into the compressor to heat the refrigerant to be flowed into the compressor.
3. A chemical looping electricity storage based heating system according to claim 1 or 2, further comprising an oxygen recovery device for storing oxygen discharged from the reduction reactor and connectable to the oxidation reactor for providing oxygen to the oxidation reactor.
4. The chemical looping electricity storage-based heating system according to claim 1, wherein the energy release unit further comprises a fourth heat exchange assembly, the fourth heat exchange assembly is disposed on the gas inlet pipe of the oxidation reactor and is connected to the second heat exchange assembly, and flue gas flowing through the second heat exchange assembly exchanges heat with the gas to be flowed into the oxidation reactor in the fourth heat exchange assembly to heat the gas to be flowed into the oxidation reactor.
5. The chemical-looping electricity-storage-based heating system according to claim 1, wherein the metal-oxygen carrier exchange system comprises a first connecting line and a second connecting line connecting the reduction reactor with the oxidation reactor, wherein the metal-oxygen carrier produced by the reduction reactor is transferred to the oxidation reactor through the first connecting line, and the metal-oxygen carrier in an oxidized state produced by the oxidation reactor is transferred to the reduction reactor through the second connecting line.
6. A chemical chain electricity storage based heating system according to claim 1, wherein the metal oxygen carrier exchange system comprises a first storage means for storing and transporting metal oxygen carriers in an oxidized state and a second storage means for storing and transporting metal oxygen carriers.
7. A chemical chain electricity storage based heating system according to any one of claims 1-6, further comprising a control unit; The control unit is used for controlling the energy storage unit to supply heat when the green energy source in the use scene of the heat supply system based on chemical chain electricity storage meets the preset requirement and/or the electricity price is less than or equal to the preset electricity price threshold value, When the green energy source in the use scene of the heat supply system based on chemical chain electricity storage does not meet the preset requirement and the electricity price is larger than the preset electricity price threshold value, the energy release unit is controlled to supply heat, And when the load of the user side is higher than the preset load, controlling the energy storage unit and the energy release unit to supply heat simultaneously.
8. A heating method, characterized in that it uses a heating system based on chemical-looping electricity storage according to any one of claims 1-7, said heating method comprising in particular: Acquiring green energy and real-time electricity price in a use scene of a heating system; If the green energy meets the preset requirement and/or the electricity price is smaller than or equal to the preset electricity price threshold value, starting the energy storage unit, heating water through the heat pump assembly, flowing into the first heat exchange assembly, and supplying the water to a user side after heat exchange with oxygen discharged by the reduction reactor in the first heat exchange assembly; and if the green energy source does not meet the preset requirement and the electricity price is larger than the preset electricity price threshold value, starting the energy release unit, and supplying water to a user side after heat exchange is performed between the water and the flue gas discharged by the oxidation reactor through the second heat exchange component.
9. A method of heating according to claim 8, further comprising: Monitoring the load of a user side in real time; When the load of the user side is higher than the preset load, the energy storage unit and the energy release unit are controlled to be started so as to supply water to the user side simultaneously through the energy storage unit and the energy release unit.
10. A terminal device is characterized by comprising a processor and a memory; The memory has stored thereon a computer readable program executable by the processor; the processor, when executing the computer readable program, implements the steps of the heating method according to any one of claims 8-9.

Description

Heat supply system, heat supply method and equipment based on chemical chain electricity storage Technical Field The application relates to the technical field of heat supply, in particular to a heat supply system, a heat supply method and equipment based on chemical chain electricity storage. Background Currently, the supply of hot water/steam relies primarily on conventional fuel direct combustion technology or electrically driven heat pump systems. However, although the fuel combustion mode is widely used, the energy conversion efficiency is relatively low, so that a large amount of energy is dissipated in the form of waste heat in the combustion process, and meanwhile, the environment is continuously stressed along with remarkable carbon dioxide and other pollutant emission. On the other hand, the green electric drive heat pump technology has higher energy efficiency and low carbon potential, but in actual operation, the technology faces the double challenges of dynamic change of heat load for users, intermittence and instability of renewable energy sources. The unmatched problem not only affects the stability and reliability of the heating system, but also restricts the control of the heating cost and the improvement of the carbon reduction effect. There is thus a need for improvements and improvements in the art. Disclosure of Invention The application aims to solve the technical problem of providing a heat supply system, a heat supply method and equipment based on chemical chain electricity storage aiming at the defects of the prior art. In order to solve the technical problems, the first aspect of the application provides a heat supply system based on chemical chain electricity storage, wherein the heat supply system based on chemical chain electricity storage comprises an energy storage unit and an energy release unit, the energy storage unit comprises a heat pump assembly, a reduction reactor and a first heat exchange assembly, the heat pump assembly and the reduction reactor are both connected with the first heat exchange assembly, water flowing through the heat pump assembly exchanges heat with oxygen discharged by the reduction reactor through the first heat exchange assembly, the energy release unit comprises an oxidation reactor and a second heat exchange assembly, the oxidation reactor is connected with the second heat exchange assembly, and water flowing into the second heat exchange assembly exchanges heat with flue gas discharged by the oxidation reactor. The energy storage unit and the energy release unit are provided with a metal oxygen carrier exchange system therebetween, the metal oxygen carrier generated by the reduction reactor is interacted to the oxidation reactor through the metal oxygen carrier exchange system, and the oxidation-state metal oxygen carrier generated by the oxidation reactor is interacted to the reduction reactor through the metal oxygen carrier exchange system. The heat supply system based on chemical chain electricity storage, wherein the energy storage unit comprises a third heat exchange component, the third heat exchange component is positioned between a condenser and a compressor in the heat pump component and is connected with the first heat exchange component, oxygen discharged by the reduction reactor enters the third heat exchange component after passing through the first heat exchange component, and heat exchange is carried out between the oxygen discharged by the reduction reactor and a refrigerant to be flowed into the compressor in the third heat exchange component so as to heat the refrigerant to be flowed into the compressor. The chemical-looping electricity-storage-based heating system further comprises an oxygen recovery device, wherein the oxygen recovery device is used for storing oxygen discharged by the reduction reactor, and the oxygen recovery device can be connected with the oxidation reactor to provide oxygen for the oxidation reactor. The heat supply system based on chemical chain electricity storage, wherein, the energy release unit still includes fourth heat exchange component, fourth heat exchange component set up in the gas intake pipe of oxidation reactor, and with second heat exchange component is connected, the flue gas that flows through second heat exchange component in fourth heat exchange component with the gas that waits to flow into oxidation reactor carries out heat transfer to heat the gas that waits to flow into oxidation reactor. The heat supply system based on chemical chain electricity storage, wherein the metal oxygen carrier exchange system comprises a first connecting pipeline and a second connecting pipeline which are used for connecting the reduction reactor and the oxidation reactor, wherein the metal oxygen carrier generated by the reduction reactor is transmitted to the oxidation reactor through the first connecting pipeline, and the metal oxygen carrier in an oxidation state generated by the oxidation reactor