Negative pressure ventilating and dust removing device for mine

Abstract

The invention discloses a negative pressure ventilating and dust removing device for a mine, which comprises an air cylinder, a multi-stage fan communicated with one end of the air cylinder and a horn-shaped connecting pipe communicated with the other end of the air cylinder. One end of the horn-shaped connecting pipe, away from the air cylinder, is connected with an air collecting pipe, and the horn mouth of the horn-shaped connecting pipe connected with the air cylinder is larger than the horn mouth of the horn-shaped connecting pipe connected with the air collecting pipe. The air collectingpipe comprises a pipe body and air guide fins which are spirally arranged on the pipe body, a plurality of meshes are arranged on the air collecting pipe sections between two adjacent spiral rings inthe air guide fin, one end of the pipe body is communicated with the horn-shaped connecting pipe, and the other end of the pipe body is an air collecting port of the air collecting pipe. Accoriding to the invention, the device is novel in design, by using the multi-stage fan, the pressure difference between the air in the dust removing device and the external air is increased, the flow velocity of the air is accelerated, the dust removing capacity is increased, the dust is guided by the air guide fins to enter the pipe body in a spiral shape, and the air flow obtains the rotary motion, the dust entering the pipe body forms vortex, thereby increasing the dust collecting range and the dust absorption speed and improving the dust removing effect.

Description

technical field [0001] The invention belongs to the technical field of dust removal safety in coal mines, and in particular relates to a negative pressure ventilation and dust removal device for mines. Background technique [0002] As one of the five natural disasters in coal mines, mine dust seriously endangers human health. If people inhale respirable dust for a long time, it will cause lung fibrous disease, leading to pneumoconiosis (silicosis, coal lung disease, coal silicosis), dust It not only deteriorates the underground working environment, but also under certain conditions, underground coal dust can explode, causing casualties and serious damage to mine equipment, leading to serious mine disasters and seriously threatening underground safety production. At present, the more practical mine dust collectors include wet dust collectors and dry ventilation dust collectors. Among them, wet dust collectors use water mist or foam spray to remove dust. The principle is to ma...

AI Technical Summary

Problems solved by technology

[0002] As one of the five natural disasters in coal mines, mine dust seriously endangers human health. If people inhale respirable dust for a long time, it will cause lung fibrous disease, leading to pneumoconiosis (silicosis, coal lung disease, coal silicosis), dust It not only deteriorates the underground working environment, but also the underground coal dust can explode under certain conditions, causing casualties and serious damage to mine equipment, leading to serious mine disasters and seriously threatening underground safety production.

At present, the more practical mine dust collectors include wet dust collectors and dry ventilation dust collectors. Among them, wet dust collectors use water mist or foam spray to remove dust. The principle is to make the dust particles stick to each other after wetting. Condensation and growth make it easy to separate from the atmosphere. In addition, for relatively high-temperature flue gas, direct spraying to achieve evaporative cooling can cool the flue gas with a small amount of water, shrink the volume, and achieve dust removal. However, spraying water mist or spraying foam During dust removal, it is difficult to achieve uniform spraying by liquid spraying. Where the liquid spraying does not reach, the dust concentration is still high, and after the dust particles are wetted, it takes a period of time for the dust particles to stick together, coagulate, and grow up. The speed of dust removal is slow. And further increase the humidity of the underground environment. In addition, the wet dust collector needs to install a large number of spray devices in a suitable position in advance, which consumes a lot of manpower and material resources; the existing dry ventilation dust collector dust removal fan suction port Short range, it is difficult to adapt to a large amount of dust environment underground

Images