A coal mine gas water pressure relief separator

Abstract

A coal mine underground gas liquor pressure relief separator mainly comprises a spiral pressure reduction bin 2, a double-layer annular sieve aperture eliminator plate 3, a water and slag collection cylinder 6, an inverted cone cutting type automatic slag discharging outlet 7 and an automatic overflow water outlet 8. A high-pressure gas liquor mixture enters the spiral pressure reduction bin, water and slime sink under the action of a spiral flow deflector, flow into the water and slag collection cylinder, and are discharged through the inverted cone cutting type automatic slag discharging outlet, and an overflow water valve is automatically opened when the water amount is too much; and the upper portion of the spiral pressure reduction bin is connected with the annular sieve aperture eliminator plate, water spray and a gas generated by jetting water are separated, and the gas is introduced to an extraction system through a collection chamber. The separator aims at high pressure water carrying slime and gas, can rapidly reduce the pressure of the gas liquor mixture, and is an automatic device for effectively realizing the separation of coal, water and gas; and the separator makes the gas separated in the cylinder smoothly enter an underground extraction pipeline, can guarantee the safe and efficient running of an extraction system, and can avoid the gas over-limit caused by the entrance of toxic and harmful substances to an underground working surface.

Description

technical field [0001] The invention novelly relates to an underground coal gas water pressure relief separator. Background technique [0002] With the further intensification of underground gas control and surface coalbed methane development, hydraulic measures have been gradually recognized and used on a large scale in view of the low permeability and softness of most coal bodies in my country. Underground coal mines mainly adopt hydraulic measures such as coal seam high-pressure water injection, hydraulic slotting, hydraulic fracturing, etc. These measures are all aimed at increasing the air permeability of coal seams. Downhole drilling hydraulic fracturing has the characteristics of simple operation, small equipment, large fracturing control range, and good drainage effect. Affected by the production process and excavation succession, the working face needs to be connected to the gas drainage system as soon as possible after adopting hydraulic measures for gas drainage....

AI Technical Summary

Problems solved by technology

[0003] At present, ordinary drainers can be divided into manual drainers and automatic drainers, but for manual drainers, due to the large amount of water in the borehole and the short time interval of draining water, especially in the initial stage of connection, the drainer with a general volume cannot It meets the requirements and wastes a lot of manpower; for the automatic water release device, although it can solve the problem of excessive manpower investment, due to the influx of a large amount of coal slime, it is easy to cause drainage channel blockage and other phenomena

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