A method and device for collecting exhaust air gas in a coal mine

Abstract

The invention discloses a collection method and a collection device for coal mine ventilation air methane. The collection device comprises a transitional pipeline and an air collection pipeline, wherein the transitional pipeline is a reducer pipe of which the diameter is reduced gradually; the large end of the transitional pipeline is connected to an air collection opening which is adjacent to the streamline ending position of an outlet on the outer side of a diffuser of a main ventilator of a mine; and the air collection pipeline is connected to an outlet at the small end of the transitional pipeline. In the collection device, the air collection pipeline collects ventilation air methane by utilizing the loss of the kinetic energy of the ventilation air methane under the guiding action of the transitional pipeline, so the normal work condition of the coal mine main ventilator is not influenced, new energy consumption is also not formed, the utilization rate of coal mine methane is improved, and a greenhouse gas effect is avoided. The collection device has a simple structure, is convenient to use, low in collection cost and high in recovery benefit, and can be widely suitable for collecting the ventilation air methane discharged from the diffuser of the coal mine main ventilator.

Description

technical field [0001] The invention relates to a collection of gas, in particular to a method and a device for collecting exhaust gas in coal mines, belonging to the field of coal mine supporting equipment. Background technique [0002] Studies have shown that the vast majority of mine gas in my country is discharged into the atmosphere in the form of exhaust air. Statistics show that in 2010 my country's coal mine gas emission was about 20 billion m 3 About 18 million tons of crude oil or 30 million tons of standard coal are wasted every year. Not only that, the greenhouse effect produced by methane in exhaust wind is CO 2 21 times that of CO, and its ability to destroy the ozone layer is about CO 2 7 times. The direct emission of exhaust gas from coal mines into the atmosphere, on the one hand, causes serious waste of limited non-renewable resources, and on the other hand, aggravates air pollution and greenhouse gas effects. [0003] Since the 1990s, in order to redu...

AI Technical Summary

Problems solved by technology

These technologies all involve the collection and treatment of coal mine exhaust air, but the technology is relatively simple, and only simple devices are used to realize the connection between the exhaust outlet of the mine main ventilator diffuser and the air collection device and pipes, and lack of coal mine exhaust air collection. Systematic and in-depth research on its connection technology with mine

Images