Separation device and separation method for gas, water and coal slag in coal mine gas extraction pipeline

Abstract

The invention relates to a separation device for gas, water and coal slag in a coal mine gas extraction pipeline. The separation device comprises a water and slag storage device, and an inlet pipeline and an outlet pipeline of the water and slag storage device, wherein a gas, water and coal slag separator is arranged in a storage device cavity of the slag storage device; mixed gas containing water and coal slag is exhausted into the storage device cavity through the inlet pipeline for gas, water and coal slag separation treatment; and the separated gas subjected to separation treatment is exhausted through the outlet pipeline. The separation device also comprises an automatic water discharging device, the automatic water discharging device is arranged at the bottom of the storage device cavity at one end of the outlet pipeline and is used for discharging water after separation treatment. The invention also provides a separation method for gas, water and coal slag. The method comprises the three separation steps of decelerating the air speed, achieving the blocking effect of the separator, absorbing water by a water absorption saturated material, performing interception again by a gas, water and slag separation water curtain, and reducing dust. The separation device is simple in structure and good in separation effect, the gas extraction efficiency is improved, and the separation device can be popularized and used in similar coal seam gas extraction.

Description

technical field [0001] The invention relates to a coal seam gas extraction device, in particular to a gas, water and slag separation device and method for a gas extraction pipeline. Background technique [0002] In the process of coal mining, due to the large amount of gas in the coal seam, in order to mine safely and greenly, it is necessary to extract the gas from the coal seam and collect it for reuse. During the gas extraction process, under the action of negative pressure, the water and cinder contained in the coal seam enter the gas extraction pipeline, and the water and cinder gradually accumulate in the gas extraction pipeline to block the drainage pipeline, making it difficult for gas to enter in time The main drainage pipe affects gas drainage and brings hidden dangers to coal mine safety production, so it is necessary to discharge water and slag in time. [0003] The gas drainage water discharge and slag discharge device is a device that collects cinders and wate...

AI Technical Summary

Problems solved by technology

First of all, due to the negative pressure in the gas drainage pipeline, the wind speed of the gas drainage pipeline is relatively high, resulting in a large amount of cinder mixed in the gas drainage pipeline, and the cinder is substituted into the gas drainage pipeline under the action of the negative pressure of the gas drainage. It is easy to cause blockage of the drainage pipeline, which seriously affects the drainage effect; secondly, the water in the gas drainage process accumulates in the drainage pipeline, and mixes with coal slag to form coal slime, which also easily leads to blockage of the drainage pipeline, and also Seriously affect the drainage effect; moreover, the traditional drainage and slag discharge devices of the drainage pipeline have the disadvantages of not being able to realize the automatic drainage function, high cost, complex structure, poor drainage and slag discharge effect, etc.

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