Cooling system for water supplied to high-temperature coal working face

Abstract

The invention discloses a cooling system for water supplied to a high-temperature coal working face. The cooling system comprises a ground water reservoir and a tube wall type heat exchanger arranged at a return airway of the underground coal working face, wherein the tube wall type heat exchanger is provided with a normal-temperature water inlet, a normal-temperature water outlet, a cold water pipe inlet and a cold water pipe outlet; the ground water reservoir is connected with the normal-temperature water inlet through a water conveying pipeline; the normal-temperature water outlet is connected to a spraying water valve arranged on the coal working face; the cold water pipe inlet and the cold water pipe outlet are connected with an underground refrigeration station. By utilizing cold water produced by the underground refrigeration station, the water conveyed by the water conveying pipeline is pre-cooled in the tube wall type heat exchanger and conveyed to the coal working face through the water conveying pipeline; a water-water heat exchange mode is adopted and the heat exchanger is arranged in the return airway, so that the environmental temperature of the coal working face can be effectively reduced and a good cooling effect is achieved.

Description

technical field [0001] The invention relates to a mine heat damage control technology, in particular to a water supply cooling system for a high-temperature coal mining face. Background technique [0002] As the mining depth of mines gradually increases, the original temperature of surrounding rocks also gradually increases, causing more and more mines to face the impact of high temperature heat damage. The heat dissipation of surrounding rock is often the main source of heat damage in high-temperature mines. In many mines, the coal mining face and the driving face are the most seriously affected areas. At the same time, the mining face is also the area where underground workers work most intensively. Since the mining face is always in the state of heat exchange between the flowing air and the newly exposed surrounding rock, the temperature of the newly exposed surrounding rock is the highest, the temperature difference between the flowing air and the newly exposed surroundi...

AI Technical Summary

Problems solved by technology

However, there are many defects in arranging cooling equipment in the air inlet lane and adopting the gas-liquid heat exchange method. First, there are many equipments in the air inlet lane of the mine, which occupies the space of the air inlet lane and increases the wind resistance of the air inlet flow; secondly, the workers in the air inlet lane move frequently, and the equipment Too much is not conducive to the passage of workers, and there are a lot of potential safety hazards; again, if the temperature of the air inlet is too low, on the one hand, when workers pass through the cooling equipment, it is easy to cause frostbite to workers; on the other hand, workers are often in the process of working. The low-temperature end near the air inlet lane of the coal mining face and the high-temperature end near the return air lane of the working face circulate back and forth. Workers work in this cycle of changing climates between cold and hot climates, which can easily cause colds and colds, which seriously affect The workers are in good health; finally, because the coal mining face usually works for a long time, if the cooling equipment is arranged in the air inlet lane, it will be transported to the vicinity of the air return lane, and the transmission line will be long, which will seriously reduce the cooling effect of the mine

Images