Method and system for reducing temperature locally under coal mine shaft

Abstract

The invention discloses a method and a system for reducing temperature locally under a coal mine shaft and belongs to the field of temperature reduction under coal mine shafts. The whole system consists of a ground part and an underground part, wherein the ground part consists of an air compressor, a cooler, an oil and water separator, a voltage stabilizer, an evaporation condenser and a drying tower; and the underground part consists of a filter, a temperature regulation valve, a heat regenerator, a high-pressure water separator, a turbine cooler, a fan, a gas mixing regulation valve and an air diffuser. Dried air provided by the ground part is filtered and is subjected to temperature regulation and then enters the turbine cooler, and then exchanges heat with the dried air in the heat generator at the outlet of a turbine, and liquid water is separated from the air flow cooled by the heat generator in a high-pressure water separator, and then the cooled air flow enters the turbine and is expanded and subjected to heat content and temperature reduction in the turbine, and then is returned and mixed once, and conveyed to the surrounding of miners through the fan and the air diffuser. The system for reducing the temperature locally under the shaft has the advantages of capacity of stably running for a long term, obvious temperature reduction effect, low energy consumption, small volume and the like.

Description

technical field [0001] The invention relates to a method and system for local cooling in underground coal mines, in particular to an air flow expansion enthalpy-reducing self-operated method and system for local cooling in underground coal mines, belonging to the field of cooling in coal mines. Background technique [0002] With the deepening of coal mine mining year by year, underground heat damage is becoming more and more serious. The air dry bulb temperature of some excavation working faces has exceeded 30°C, and the relative humidity can reach 100%. Heat damage has caused harm to the health of miners, a threat to mine safety, and greatly reduced labor productivity. According to the national safety production regulations, cooling measures must be implemented in coal mines. [0003] When non-refrigeration measures such as heat source isolation and enhanced ventilation are not enough to eliminate underground heat damage, or the technical and economic effects are not good, ...

AI Technical Summary

Problems solved by technology

However, there are two disadvantages in this mine local cooling machine: (1) due to the moisture contained in the air flow, the moisture will be converted into ice particles at low temperature, and the high-speed turbine will be damaged by the ice particles after long-term operation, resulting in The cooling machine cannot run stably for a long time; (2) Due to the small cooling capacity, it is difficult to meet the requirement of reducing the dry bulb temperature of the air in the entire excavation face area from 32°C to below 26°C

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