Coal mine underground gas pumping and purifying system

Abstract

The invention discloses a coal mine underground gas pumping and purifying system. The coal mine underground gas pumping and purifying system comprises a circulating pumping system and a purifying heatexchange system; the circulating pumping system comprises an overground gas inlet system and an underground gas exhaust system; the ground gas inlet system comprises an air feeder, a gas inlet pipeline and a gas inlet branch pipe which are arranged on the ground; the underground gas exhaust system comprises an air blower, a gas exhaust pipeline and a gas exhaust branch pipe which are arranged onthe ground; the gas inlet pipeline and the gas exhaust pipeline are both vertically and fixedly arranged in a soil layer through fixing lugs; the gas inlet branch pipe and the gas exhaust branch pipeare both arranged at the top of a mine through fixing sleeves; and the purifying heat exchange system comprises a hydrocarbon refrigerant storage tank, a hydrocarbon refrigerant circulating pump, a heat exchanger, a circulating water cooler and a circulating water cooling area. An original circulating device is replaced with a hydrocarbon refrigerant medium, so that the problems that the evaporation capacity is large, and a channel of the heat exchanger is blocked are solved; and gas in the mine is directly and preliminarily filtered and purified, the safety of constructors under the mine is guaranteed, a power source is arranged on the ground for facilitating maintenance, and thus safety is better realized.

Description

technical field [0001] The invention relates to the technical field of coal mine mining and utilization, in particular to an underground gas extraction and purification system for coal mines. Background technique [0002] Coal mining needs to open a mine underground. When mining coal in the mine, there will be gas gas entering the mine through the coal seam, and the gas contains carbon monoxide gas, which is toxic and easily poses a threat to the life of the miners. And the gas in the gas Methane, etc., when the concentration reaches a certain level, it is easy to burn and explode, causing mine mining accidents. Therefore, in the process of coal mining, it is necessary to pump the gas in the mine to avoid the increase of the internal gas concentration. [0003] Moreover, the purification of gas after gas extraction involves the exchange of heat between cold and hot media in the production process. The existing projects basically use water as the cold medium, and use a large ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a coal mine underground gas extraction and purification system to solve the above-mentioned problems in the prior art. Blockage and other problems; and the gas in the mine is directly filtered and purified to ensure the safety of the construction personnel in the mine, and the power source is installed on the ground for easy maintenance, which is safer

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