CN-122014317-A - Mine compression heat treatment system and method based on compressed air energy storage

CN122014317ACN 122014317 ACN122014317 ACN 122014317ACN-122014317-A

Abstract

The application discloses a mine compression heat treatment system and method based on compressed air energy storage, wherein the system comprises an aboveground compressed air energy storage unit and an underground ventilation heat control and regulation unit, the aboveground compressed air energy storage unit comprises an air compressor, a cooler and a gas storage device which are sequentially communicated, the underground ventilation heat control and regulation unit comprises a shaft air supply pipeline and a pressure regulation device, an inlet of the shaft air supply pipeline is communicated with an outlet of the gas storage device, and the pressure regulation device is arranged in a pipeline in which the inlet of the shaft air supply pipeline is communicated with the outlet of the gas storage device, so that the pressure of air fed into the shaft air supply pipeline can be regulated and controlled according to underground actual requirements. The application eliminates the refrigeration energy consumption aiming at self-compression heat treatment from the root, and realizes the technical fusion and energy collaborative utilization of energy storage technology and mine heat damage treatment.

Inventors

DONG KAIJUN
LEI YAPING
SUN QIN
ZHANG BOBO

Assignees

中国科学院广州能源研究所

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (10)

1. The mine compression heat treatment system based on compressed air energy storage is characterized by comprising an aboveground compressed air energy storage unit and an underground ventilation heat control and regulation unit; The aboveground compressed air energy storage unit comprises an air compressor, a cooler and a gas storage device which are sequentially communicated; The underground ventilation thermal control adjusting unit comprises a shaft air supply pipeline and a pressure adjusting device, wherein an inlet of the shaft air supply pipeline is communicated with an outlet of the air storage device, and the pressure adjusting device is arranged in a pipeline with the inlet of the shaft air supply pipeline communicated with the outlet of the air storage device and used for adjusting and controlling air pressure fed into the shaft air supply pipeline according to underground actual requirements.
2. The mine compression heat treatment system based on compressed air energy storage as claimed in claim 1, further comprising a power generation unit, wherein the power generation unit comprises an expander and a generator, an outlet of the gas storage device is communicated with an air inlet of the expander, a power output end of the expander is connected with the generator, and an air outlet of the expander is connected to an inlet of the shaft air supply pipeline.
3. The mine compression heat treatment system based on compressed air energy storage as claimed in claim 2, wherein a first valve is installed in a pipeline in which an outlet of the gas storage device is communicated with the pressure regulating device; And a second valve is arranged in a pipeline of the outlet of the gas storage device communicated with the gas inlet of the expander.
4. The mine compression heat treatment system based on compressed air energy storage as claimed in claim 2, further comprising a compression heat recovery unit, wherein the compression heat recovery unit comprises a heat regenerator and a heat storage device, the heat exchange side of the cooler is connected with the heat storage end of the heat storage device and is used for recovering compression heat generated in the compression process of the air compressor and storing the compression heat in the heat storage device, the heat exchange side of the heat regenerator is connected with the heat release end of the heat storage device, and the medium side of the heat regenerator is connected between the gas storage device and the expansion machine in series and is used for preheating compressed air flowing to the expansion machine by using the compression heat stored by the heat storage device.
5. The mine compression heat treatment system based on compressed air energy storage as claimed in claim 4, wherein a first valve is installed in a pipeline of which the outlet of the gas storage device is communicated with the pressure regulating device; and a second valve is arranged in a pipeline connected with the outlet of the gas storage device and the heat regenerator.
6. The mine compression heat treatment system based on compressed air energy storage of claim 1, wherein the cold source of the cooler can utilize a natural cold source, and the natural cold source comprises one or a combination of more of surface low-temperature wind, mine backwater and spray cooling.
7. The mine compression heat treatment system based on compressed air energy storage as claimed in claim 1, wherein the gas storage device is any one of a pressure vessel, an underground salt cavern structure or a abandoned mine hole, and the bottom of the gas storage device is provided with a water drainage device.
8. The mine compression heat treatment system based on compressed air energy storage as claimed in claim 1, wherein the shaft air supply pipeline is an explosion-proof seamless steel pipe, and the outer wall of the shaft air supply pipeline is coated with an insulating layer and an anti-corrosion layer.
9. A method for mine compression heat treatment by using the system of claim 2, which is characterized by comprising an energy storage stage and an energy release heat control stage; selecting a low-valley period of a power grid to run, filtering and dedusting the air on the well, then entering an air compressor, compressing the air into high-pressure high-temperature air, then entering a cooler to remove compression heat, and storing the cooled normal-temperature high-pressure air into a gas storage device for energy storage; The energy release and heat control stage comprises the following steps: The pure energy release and heat control mode is that high-pressure air at the outlet of the air storage device is directly sent to the inlet of a shaft air supply pipeline, regulated and controlled by a pressure regulating device to a preset pressure value matched with the corresponding depth in the pit, and then is conveyed to the pit through the shaft air supply pipeline; The energy release power generation and heat control mode includes selecting power grid peak period to operate, expanding high pressure air in the air storage device to produce work to drive the generator to generate power, and regulating the exhaust of the expander to the pressure value corresponding to the depth of the well via the pressure regulator and conveying the pressure value to the well via the well.
10. A method for mine compression heat treatment by using the system as claimed in claim 4 or 5, which comprises an energy storage stage and an energy release heat control stage; The energy storage stage comprises selecting a low-valley period of a power grid to run, filtering and dedusting the air on the well, then entering an air compressor, compressing the air into high-pressure high-temperature air, then entering a cooler to remove compression heat, and storing the cooled normal-temperature high-pressure air in a gas storage device for energy storage; The energy release and heat control stage comprises the following steps: The pure energy release and heat control mode is that high-pressure air at the outlet of the air storage device is directly sent to the inlet of a shaft air supply pipeline, regulated and controlled by a pressure regulating device to a preset pressure value matched with the corresponding depth in the pit, and then is conveyed to the pit through the shaft air supply pipeline; Energy release power generation and heat control mode: The method comprises the steps of selecting a peak period of an electric network to run, enabling high-pressure air at an outlet of a gas storage device to enter a heat regenerator, preheating the high-pressure air which is about to enter an expander by utilizing compression heat stored in the heat storage device in the heat regenerator, enabling the preheated high-pressure high-temperature air to expand and do work in the expander so as to drive a generator to generate electricity, enabling exhaust gas of the expander to be sent to an inlet of a shaft air supply pipeline, and enabling the exhaust gas to be conveyed to the underground through the shaft air supply pipeline after being regulated and controlled to a preset pressure value matched with the underground corresponding depth by a pressure regulating device.

Description

Mine compression heat treatment system and method based on compressed air energy storage Technical Field The invention relates to the technical field of mine heat damage treatment and air compression energy storage, in particular to a mine compression heat treatment system and method based on compressed air energy storage. Background As mineral resource exploitation continues to extend to deep, heat damage has become a core bottleneck restricting safe production and efficient exploitation. The high-temperature and high-humidity underground environment not only seriously damages the physical health of operators and greatly reduces the labor production efficiency, but also is extremely easy to induce various safety accidents, so that the effective mine cooling is a rigid requirement for ensuring the smooth proceeding of deep resource exploitation. The heat source of deep mines has a complex composition, wherein the self-compression heat generated by air when descending along the shaft under the action of gravity is particularly prominent. For a one kilometer deep well, the temperature rise caused by air self-compression can reach more than 10 ℃, and the main source of underground basic heat load is formed. However, at present, a systematic treatment means is not available for self-compression heat, and the existing mine cooling mainly depends on an electric-driven mechanical refrigeration system, such as a water chilling unit, so that the problems of high energy consumption, high running cost and the like exist. How to radically eliminate the generation condition of the self-compression heat of the mine air is a technical blank in the current mine heat damage treatment field. The Compressed Air Energy Storage (CAES) technology is used as a large-scale physical energy storage mode, and can utilize low-valley electric power of a power grid to compress and store air, and release power generation in peak time to realize peak clipping and valley filling. However, in the conventional CAES system, a large amount of compression heat generated in the compression process is usually directly discharged, and low-temperature air generated in the expansion process is not effectively utilized, so that the overall energy efficiency of the system is low, and a significant waste heat utilization potential exists. In summary, the prior art has a cutting state that mine compression heat treatment is challenged by high cost and high energy consumption, and the compressed air energy storage technology has the bottlenecks of residual pressure, waste heat waste and efficiency improvement. Disclosure of Invention In order to solve the defects in the prior art, the invention provides a mine compression heat treatment system and method based on compressed air energy storage. The system combines compressed air energy storage and mine heat damage treatment, and effectively solves the problem of self-compression heat of the deep mine air by regulating and controlling the air on the well to be in a pressure state suitable for the underground in advance and eliminating the self-compression heat generation condition in the descending process of the mine air from the root. In order to achieve the above purpose, the technical scheme of the invention is as follows: In a first aspect, the invention provides a mine compression heat treatment system based on compressed air energy storage, which comprises an aboveground compressed air energy storage unit and an underground ventilation heat control and regulation unit; The aboveground compressed air energy storage unit comprises an air compressor, a cooler and a gas storage device which are sequentially communicated; The underground ventilation thermal control adjusting unit comprises a shaft air supply pipeline and a pressure adjusting device, wherein an inlet of the shaft air supply pipeline is communicated with an outlet of the air storage device, and the pressure adjusting device is arranged in a pipeline with the inlet of the shaft air supply pipeline communicated with the outlet of the air storage device and used for adjusting and controlling air pressure fed into the shaft air supply pipeline according to underground actual requirements. Therefore, the system combines compressed air energy storage with mine heat damage treatment, and the self-compression heat generation condition in the descending process of the mine air is eliminated from the root by regulating and controlling the air on the well to be in a pressure state suitable for the well in advance, so that the problem of self-compression heat of the mine air in the deep part is effectively solved. As an improvement of the invention, the system also comprises a power generation unit, the power generation unit comprises an expander and a generator, the outlet of the gas storage device is communicated with the air inlet of the expander, the power output end of the expander is connected with the generator, the air outlet of the expander i