Filtering and fire inhibiting device for coal mine gas extraction pipeline

Abstract

The invention discloses a filtering and fire inhibiting device for a coal mine gas extraction pipeline. The filtering and fire inhibiting device comprises a filtering and fire inhibiting tank as well as a gas delivery assembly, a filtering medium assembly and a water quantity control and residue removal assembly which are mounted on the filtering and fire inhibiting tank. The filtering and fire inhibiting device has the characteristics of high filtering efficiency, simple structure, convenience in operation, work stability, economy, practicability and the like and can be applied to gas outlets of collecting pipes, gas extraction branch pipes, main pipes and the like of gas extraction drilling fields.

Description

technical field [0001] The invention relates to a coal mine gas drainage pipeline filtering fire suppressing device, which belongs to the technical field of coal mine gas drainage. Background technique [0002] Underground coal mine gas drainage methods can be divided into: coal seam gas pre-drainage, pressure relief coal seam gas drainage and goaf gas drainage according to the drainage mechanism. During the extraction process, due to different temperature differences between points, water in the coal and rock mass itself or water conduction in cracks, condensed water and seepage water will accumulate in the gas extraction system, affecting the normal operation of the extraction system, increasing the resistance of gas extraction and reducing gas Drainage effect: Due to the disturbance construction of coal and rock mass such as drilling and mining, through the negative pressure extraction of the drilling hole or the action of crushed gangue and dust self-weight, some of the ...

AI Technical Summary

Problems solved by technology

The main problem of this method is: large resistance, the fire suppressing device and filter screen installed directly on the extraction pipeline, in addition to increasing the resistance of the extraction system itself, the broken gangue and dust intercepted by the filter will greatly increase the pressure of the extraction system. Resistance; low efficiency, most of the water release device is branched from the extraction pipeline, relying on the water's own weight to flow into the water release device, but most of the gas-water mixture is pumped away with the air flow due to inertia, and flows in the pipeline or accumulates somewhere ; The investment is large, and the unit price of the gas drainage pipeline fire suppression device is as high as 200,000 RMB. The mine drainage system needs to be installed in many places, and the investment is large. Because the pipeline filter residue, water release and fire suppression device are independent, there is also a lot of maintenance manpower input

Images