CN-115370440-B - Air drying device system and method for compressed air energy storage

Abstract

The invention provides an air drying device system and method for compressed air energy storage, wherein the air drying device system utilizes an adsorption type air drying device to dry air in the compressed air energy storage process, so that corrosion of various devices and pipelines in the device system is effectively avoided, waste heat of exhaust gas at the tail end of an air turbine and a heat storage medium is reasonably utilized, the power consumption of a heat dissipating device is reduced, the energy utilization rate is improved, and the air drying device system has a large-scale industrialized popularization and application prospect.

Inventors

• JIANG LI
• LIU WANGKOU
• SHEN JINGJING
• LI SHIQI

Assignees

• 上海发电设备成套设计研究院有限责任公司

Dates

Publication Date

20260505

Application Date

20220818

Claims (10)

1. 1. An air drying method for compressed air energy storage, characterized in that the air drying method is carried out by adopting the following air drying device system for compressed air energy storage: The air drying device system comprises an air compression device, a cooling device, an air storage device, a heating device and an air turbine which are connected in sequence; The air drying device system also comprises an adsorption type air drying device and a heat dissipation device, wherein the adsorption type air drying device comprises an air inlet pipeline to be dried, a drying air exhaust pipeline, a first medium pipeline and a second medium pipeline; the adsorption type air drying device is connected with the heating device through a first medium pipeline and is connected with the heat dissipation device through a second medium pipeline; The air compressing device and the cooling device which are sequentially connected are used as a group of air treatment devices, and the adsorption type air drying device is also arranged between the former group of air treatment devices and the latter group of air treatment devices along the air flow direction; The air drying method further comprises the following steps: when compressed air stores energy, the air enters an adsorption type air drying device to be dried after being processed by a former group of air compression devices and cooling devices which are connected in sequence, and then enters an air storage device to be stored after being processed by a latter group of air compression devices and cooling devices which are connected in sequence; When the compressed air releases energy, the heat storage medium in the second heat storage medium storage device flows through the heating device and the adsorption type air drying device, and the waste heat of the heat storage medium is utilized to realize the regeneration of the drying agent; the pressure dew point of the adsorption type air drying device is-70 to-30 ℃.
2. 2. The air drying method according to claim 1, wherein the number of the air compressing devices is two or more.
3. 3. The air drying method according to claim 1, wherein the number of cooling devices is the same as the number of air compressing devices.
4. 4. The air drying method according to claim 1, wherein the number of heating means is the same as the number of air turbines.
5. 5. The air drying method according to claim 1, wherein the number of the air turbines is two or more.
6. 6. The air drying method of claim 1, wherein the number of air turbines is the same as the number of air compression devices.
7. 7. The air drying method of claim 1, wherein the air drying device system further comprises a first heat storage medium storage device and a second heat storage medium storage device.
8. 8. The air drying method according to claim 7, wherein the first heat storage medium storage device is connected to the cooling device and the second heat storage medium storage device in sequence.
9. 9. The air drying method according to claim 7, wherein the second heat storage medium storage device is connected to the heating device, the heat dissipating device, and the first heat storage medium storage device in this order.
10. 10. The air drying method according to claim 1, wherein the temperature of the waste heat for realizing the regeneration of the drying agent is 60-85 ℃.

Description

Air drying device system and method for compressed air energy storage Technical Field The invention relates to the technical field of energy, in particular to an air drying device system and method for compressed air energy storage. Background The compressed air energy storage is used as a novel energy storage technology with long period, large capacity and low cost, has the advantages of flexible site selection, safety and environmental protection, can realize renewable energy consumption, peak clipping and valley filling, supports stable power grid, can provide comprehensive energy sources such as cold, heat, electricity and industrial gas, and the like, and is receiving wide attention. CN112648076a discloses a compressed air energy storage system, comprising a compressed air energy storage subsystem, a compressed heat recovery subsystem, a gas storage subsystem, a compressed heat release subsystem and a compressed air energy release subsystem. The compressed air energy storage subsystem is connected with the compressed air recovery subsystem through a pipeline, the compressed air subsystem is connected with the air storage subsystem through a pipeline, the air storage subsystem is connected with the compressed air release subsystem, the compressed air release subsystem is connected with the compressed air energy release subsystem through a pipeline, and an air temperature raising device is arranged between the compressed air release subsystem and the compressed air energy release subsystem. The compressed air energy storage subsystem is connected with the compressed heat recovery subsystem, the compressed heat release subsystem is used for utilizing the compressed heat, and the temperature of air at the inlet of the compressed air energy release subsystem is increased by the air temperature increasing device before the air enters the compressed air energy release subsystem, wherein the air temperature increasing device is a waste heat resource of an industrial enterprise, so that higher generated energy is ensured. CN103644095A discloses a novel method and apparatus for storing energy of compressed air, which divides the variable working condition input power range of input electric energy into several levels, each power level corresponds to the pressure level of the compressed air energy storage system. When the power of the input electric energy is changed greatly, the variable working condition operation is realized by changing the pressure level of the compressed air energy storage system, and the electric energy is stored, and when the power of the input electric energy is changed less, the pressure level of the compressed air is kept unchanged, the variable working condition operation is realized by adjusting the flow of the compressed air, and the electric energy is stored. Compressed air with different pressures is stored respectively in a constant pressure storage mode. The compressed air energy storage device is used for storing the compressed air, so that all main equipment of the system always operates near the rated working condition under the condition that the input power of the electric energy is changed frequently, and the energy storage efficiency of the energy storage system is greatly improved. CN112096470a discloses a liquid compressed air energy storage peak shaving system and method coupled with a heating system, through which air compression heat of the liquid compressed air energy storage system is recovered. And in the non-heating season, condensation water is adopted to recycle the air compression heat, so that the energy consumption of the unit is reduced. And the whole operation efficiency of the system is improved through the coupling of the heat supply system of the coal-fired unit and the liquid compressed air energy storage system. Compared with a conventional liquid compressed air energy storage peak shaving system with a heat storage device, the air cooler is adopted to recycle air compression heat to the thermodynamic cycle of the unit, and the configuration of the heat storage system is canceled. The running efficiency of the whole system is effectively improved, and the investment of the whole engineering is reduced. However, the compressed air energy storage system does not consider that the compressed air is cooled, water is separated out due to the rise of the dew point, the inlet working condition of the next section of compressor is not facilitated, and the pipeline of the system equipment is corroded. Therefore, developing an air drying device system and method for storing energy of compressed air, and processing moisture in air is a problem to be solved in the compressed air energy storage system. Disclosure of Invention In view of the problems in the prior art, the invention provides an air drying device system and a method for compressed air energy storage, which can not only realize the drying of air and avoid the corrosion of equipment and pipelines, but a