Pressure-reduction, anti-explosion and dust-removal device for aerodynamic reservoir reform of coal-bed gas well

Abstract

The invention provides a pressure-reduction, anti-explosion and dust-removal device for aerodynamic reservoir reform of a coal-bed gas well, and is applicable to the technical field of gas power operation of the coal-bed gas well. The pressure-reduction, anti-explosion and dust-removal device mainly comprises a dust remover (1), a diffusion tube (2) and a gas feeding tube (3). During technical construction of a gas power reform coal storage reservoir, high-flow-speed gas is not directly released in air in a pressure releasing stage, is guided by the gas feeding tube (1) to enter the diffusion tube (2), and is subjected to eight pressure reduction effects under the action of eight wind shields (12) in the diffusion tube (2). Gas flows to the dust remover (1) through auxiliary round ventilating holes (5) in the wind shields (12), and coal (rock) powders or particles in the gas are stopped by the wind shields (12), drop, are blown by the gas, enter the dust remover through a coal passing hole (6) and then are removed. A four-stage blade type vortex plate tower tray (7) is arranged in the dust remover (1), the gas is forced to spirally rise by using the four-stage blade type vortex plate tower tray (7), and liquid flow is formed by water flow injected through a water injection tube, is distributed on blades of the vortex plate tower tray (7), is thrown to a wall of a tower by centrifugal force, and then flows in a water draining hole (9).

Description

technical field [0001] The invention belongs to the technical field of coalbed gas well gas power operation, and mainly relates to a decompression, explosion-proof and dust removal device for coalbed gas well aerodynamic reservoir transformation. Background technique [0002] In coalbed methane wells, the transformation of coal reservoirs by gas power is an effective technical means to improve the productivity of coalbed methane wells. The principle is: inject high-pressure air into the coalbed methane well, and the high-pressure air will expand the cracks in the coal reservoir, and then release the pressure. The purpose of dredging and expanding reservoir fractures is to generate new induced fractures, thereby enhancing the permeability of coal reservoirs and improving the gas production capacity of coal reservoirs. [0003] Generally speaking, the process of coal reservoir transformation by gas power is divided into seven stages, including: test injection stage, initial i...

AI Technical Summary

Problems solved by technology

In the gas injection stage, the air compressor compresses the air into the coalbed methane well. When the pressure reaches above 10MPa, it enters the pressure release stage after closing the pressure. (Rock) powder or particles, gas gas is directly thrown into the air, and the coal (rock) powder or particles carried are easy to collide with objects and generate sparks, causing gas deflagration, damaging the facilities around the construction site and threatening personal safety

At the same time, when the high-pressure gas is released, the noise is huge, and the coal particles and dust seriously pollute the environment and affect the lives of nearby residents.

So far, there is no relevant supporting device and technology to solve the practical problems existing in the prior art

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