Compressing-deslagging-drilling dust remover for coal pits

Abstract

The invention discloses a compressing-deslagging-drilling dust remover for coal pits, which relates to a device for ventilation and dust removal in a coal pit. The dust remover comprises a Venturi tube mixer, wherein the Venturi tube mixer comprises a gas inlet chamber, a constricted tube section, a straight tube section and a conical divergent section; a high pressure gas inlet tube is arranged in the gas inlet chamber; the outer end of the high pressure gas inlet tube is arranged outside the gas inlet chamber; the inner end of the high pressure gas inlet tube is connected with at least one straight tube which is parallel to the central axis of the Venturi tube mixer; the other end of the straight tube is provided with a high pressure gas injection head; the outlet of the high pressure gas injection head is arranged in the Venturi tube mixer; the Venturi tube mixer is also provided with a water inlet tube; the water inlet tube is provided with a valve; the inner end of the water inlet tube is connected with a water atomization injection head; and the water atomization injection head is arranged in the Venturi tube mixer. By using the high pressure gas injection principle and the wet dust removal technique, the dust remover has the advantages of simple structure, small size, light weight, convenient transportation and high dust removal efficiency.

Description

technical field [0001] The invention relates to an underground ventilation and dust removal device for coal mines, which is mainly used for dry drilling dust removal on coal seam walls of underground roadways in coal mines, dust reduction by anchor spraying technology, and belt coal transportation and reloading points. Background technique [0002] Because gas threatens the safety of coal mining, it is an important link before coal mining to drill holes in the wall of coal mines to drain gas from coal seams. For some soft coal seams, only dry drilling can be used, and the compressed air blowing process is used to make the coal powder and compressed air generated during drilling spray out along the gap between the drill pipe and the hole wall. Although the flow rate of the blowing dust gas is not large, the energy of the compressed air is large, and the impact force of the formed airflow is strong, and the amount of dust carried is as high as 3000mg / m 3 Above, the environmen...

AI Technical Summary

Problems solved by technology

Although the flow rate of the blowing dust gas is not large, the energy of the compressed air is large, and the impact force of the formed airflow is strong, and the amount of dust carried is as high as 3000mg / m 3 Above, the environment of the working face is very harsh, which seriously threatens the health of the operators; the gas concentration of the jet air is high, and due to the high safety production requirements, the dust reduction method of the dust blowing process prohibits fan extraction

[0003] In order to improve the serious environmental pollution problem in dry drilling, the current method is to install a dust collector for the drill pipe casing at the hole of the dry drilling. The small casing goes deep into the coal seam, and the large casing is close to the wall of the roadway. The blowing dust of compressed air is sprayed out along the gap between the drill pipe and the small casing into the large casing, and the dust is sprayed in the large casing to reduce the dust. The dust removal efficiency is between 50% and 60%. Although the dust reduction effect is obvious, it is difficult to achieve work Environmental Hygiene Standards

At present, there are other forms of process equipment for orifice dust removal, such as multi-stage non-powered orifice dust collector (200920032546.X), mine wet orifice dust collector (200620110816.0), but due to the large size of the equipment, it is difficult to quickly remove, install and Difficult to carry and difficult to adapt to the needs of frequent replacement of drilling positions

Images