Air curtain and water mist linked system for preventing and controlling dust on comprehensive excavation surfaces

Abstract

The invention relates to an air curtain and water mist linked system for preventing and controlling dust on comprehensive excavation surfaces. The air curtain and water mist linked system is composed of a water inflow pipe, a pipeline filter, a main gas inflow pipe, a linkage valve, branch gas inflow pipes, adjusting valves, pressure gauges, an air curtain generator, a water mist generator and a water mist conveying pipe, wherein the pipeline filter is arranged at the initial segment of the water inflow pipe; the linkage valve is arranged between the water inflow pipe and the main gas inflow pipe and is used for simultaneously controlling the on and off of water and gas; the main gas inflow pipe is divided into two branch gas inflow pipes by a tee joint; the air curtain generator is connected with one branch gas inflow pipe; the water mist generator is connected with the water inflow pipe and the other branch gas inflow pipe; and the adjusting valves and the pressure gauges are sequentially arranged on the branch gas inflow pipes and the water inflow pipe and used for adjusting the working pressure of water and gas. The air curtain and water mist linked system has the characteristics that: when the linkage valve and adjusting valves are opened to form an air curtain and generate a dust isolation region, the water mist is injected into the dust isolation region, thus the effective control to the dust on the comprehensive excavation surfaces is achieved; and the system is simple and convenient to operate, free of electrical elements, agile to move as well as safe and reliable, and has broad practicability.

Description

technical field [0001] The invention relates to an air curtain and fine water mist system for preventing and controlling dust, in particular to an air curtain and fine water mist linkage system for preventing and controlling flour dust during fully mechanized excavation in coal mines. Background technique [0002] In order to prevent the hazards of flour dust in fully mechanized excavation, devices such as internal and external spraying of roadheaders, coal seam water injection, and dust removal fans are generally used, but the dust prevention effect is not ideal due to the limitations of these devices. For example, the coal seam water injection system and process are complex, water consumption is large, and a large number of water injection holes need to be constructed, which requires a large amount of engineering and high cost; the nozzles for internal and external spraying are easily blocked, the efficiency of dust suppression is low, and the utilization rate of dust suppr...

AI Technical Summary

Problems solved by technology

[0002] In order to prevent the hazards of flour dust in fully mechanized excavation, devices such as internal and external spraying of roadheaders, coal seam water injection, and dust removal fans are generally used, but the dust prevention effect is not ideal due to the limitations of these devices.

For example, the coal seam water injection system and process are complex, water consumption is large, and a large number of water injection holes need to be constructed, which requires a large amount of engineering and high cost; the nozzles for internal and external spraying are easily blocked, the efficiency of dust suppression is low, and the utilization rate of dust suppression water is low; the dust removal fan The effective suction range is short, the dust collection rate is low, it is too bulky, it is inconvenient to move, and there are electrical safety hazards

In addition, there is currently a dust reduction device that is used in combination with an air curtain and a dust removal fan. In addition to the above-mentioned defects of the dust removal fan itself, the dry dust removal device has a relatively high concentration of dust and gas in the enclosed area. Sparks generated during coal and rock can easily induce coal dust, gas explosions and other vicious accidents

[0003] As an excellent dust-reducing medium, fine water mist has unique advantages that ordinary water mist cannot match, such as small particle size, slow settling velocity, and rapid dispersion. Utilizing the air curtain to form a closed dust-proof space while injecting ultra-fine water mist into the closed area) is a new method with great application prospects to prevent and control dust in fully mechanized excavation, but there is no matching method at home and abroad. The equipment system is not conducive to the development and application of this new technology

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