Negative pressure adjustment system of coalbed methane collecting and conveying system in coal mining area and adjustment method of negative pressure adjustment system

Abstract

The invention relates to the field of coal mine safety, in particular to a negative pressure adjustment system of a coalbed methane collecting and conveying system in a coal mining area. The negative pressure adjustment system comprises a methane concentration sensor, a negative pressure regulation device and a control device, wherein the methane concentration sensor and the negative pressure regulation device are arranged in a pipe of a coalbed methane collecting and conveying pipe network in the coal mining area at interval; and the control device is used for receiving methane concentration data acquired by the methane concentration sensor and judging whether the methane concentration data is less than a threshold value and controlling the negative pressure regulation device, at one side close to a pump, of the corresponding methane concentration sensor to reduce atmospheric pressure in the pipe if the methane concentration data is less than a threshold value. The invention also discloses a coalbed methane conveying system in the coal mining area and a negative pressure adjustment method of the coalbed methane conveying system. By the negative pressure adjustment system and method for the coalbed methane conveying system in the coal mining area, the methane concentration of the coalbed methane in the coalbed methane collecting and conveying pipe network is monitored in real time, the methane concentration of the coalbed methane is controlled by adjusting the negative pressure of the pipe, the safe conveying of the underground extracted coalbed methane in the coal mining area is realized, and the utilization efficiency of the extracted coalbed methane is improved.

Description

technical field [0001] The invention relates to the field of coal mine safety, in particular to a negative pressure regulating system and a negative pressure regulating method for a coalbed gas gathering and transportation system in a coal mining area. Background technique [0002] Coalbed methane, also known as coalbed gas or coalbed methane, is a self-storage natural gas that exists in coal seams and solid rocks in an adsorbed or free state through biochemical pyrolysis during the coal formation process. It belongs to unconventional natural gas and is high-quality Chemical and energy raw materials. [0003] The concentration of coalbed methane in the coal mining area is determined by the extraction method and technology and the sealing state of the gathering and transportation pipeline of the extraction system. The size of the gas negative pressure in the pipeline determines the level of its extraction concentration. At present, among the coalbed methane extracted underg...

AI Technical Summary

Problems solved by technology

At present, among the coalbed methane extracted underground in coal mining areas, the concentration of a few better extraction pumping stations is only about 50%, and the extraction concentration of more than 60% of the pumping stations is lower than 30%.

On the one hand, this causes a great waste of the capacity of the drainage system. On the other hand, in the part of the pumping station whose extraction concentration is lower than 30%, a large part of the concentration is just in the explosive concentration range, thus making the extraction and collection There are great potential safety hazards in the process of transporting or even emptying this part of coalbed methane

At the same time, the low concentration of coalbed methane will also have a negative impact on its utilization

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