Efficient coaxial air curtain dedusting system for coal mine

Abstract

The invention relates to an efficient coaxial air curtain dedusting system for a coal mine. The efficient coaxial air curtain dedusting system for the coal mine comprises an inner air cylinder and an outer air cylinder and is characterized in that the inner air cylinder is a horn-shaped opening, the end, with a small diameter, of the inner air cylinder is concentric with the outer air cylinder and is sleeved with the outer air cylinder in a non-contact mode, the end, sleeved with the outer air cylinder, of the inner air cylinder is closed, the inner diameter of the outer air cylinder is larger than the diameter of the end, with the small diameter, of the inner air cylinder and is smaller than the diameter of the end, with the large diameter, of the inner air cylinder, a pressure fan is arranged in the outer air cylinder, an air outlet pipe is arranged on the side wall of the inner air cylinder, and an exhaust fan is arranged in the air outlet pipe. The efficient coaxial air curtain dedusting system for the coal mine is high in dedusting efficiency and small in power consumption.

Description

technical field [0001] The invention belongs to the field of mine equipment, and in particular relates to a high-efficiency coaxial air curtain dust removal system for coal mines. Background technique [0002] Most of the coal seams are far from the surface, so surface mining cannot be used. Underground mining accounts for 60% of the world's coal mine production. In pits, the room-and-pillar method is often used to advance through the coal seam, with beams and columns used to support the pit. However, in the process of coal mining, the depth of the mine is often hundreds of meters or even thousands of meters, and the content of foreign gas inside is low, and the content of toxic gas is high. Therefore, it is necessary to blow fresh air into the mine and discharge the toxic gas and dust in the mine. Existing mine dust removal mostly uses high-power dust removal fans and air ducts for dust removal and air supply. Often 45KW*2 dust removal fans are used, but the power of th...

AI Technical Summary

Problems solved by technology

However, in the process of coal mining, the depth of the mine is often hundreds of meters or even thousands of meters, and the content of foreign gas inside is low, and the content of toxic gas is high. Therefore, it is necessary to blow fresh air into the mine and discharge the toxic gas and dust in the mine. Existing mine dust removal mostly uses high-power dust removal fans and air ducts for dust removal and air supply. Often 45KW*2 dust removal fans are used, but the power of the fans is relatively large, the use cost is high, and there will be formation at the end of the air duct. In the negative pressure area, it is often impossible to remove dust in the negative pressure area, resulting in poor dust removal effect, and the dust on the operating surface will disperse, resulting in relatively large operating flour dust, which affects the health of workers

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