Gas-water injection device and dust control system for dust produced by cutting of coal cutter

Abstract

The invention discloses a gas-water injection device and a dust control system for dust produced by cutting of a coal cutter. The dust control system adopts the structure that a rocker is arranged on a coal cutter, a coal cutting roller is arranged at the front end of the rocker, an extracting dust removal blower is arranged on each of two sides of the coal cutter, air intake cylinders of the extracting dust removal blowers are arranged along the rocker and extend to the coal cutting roller; an obliquely arranged mounting bar is arranged on the rocker; the center of the tail end of the mounting bar and the center of the coal cutting roller are located on the same horizontal line; three gas-water injection devices are uniformly arranged at the tail end of the mounting bar with 120 degrees' angles formed among the gas-water injection devices. According to the gas-water injection device and the dust control system, the particle diameters of fog drops are reduced, a compact gas-water curtain with a relatively large gas specific weight is finally formed, dust is controlled by the gas-water curtain generated by the air-water linkage injection device, and dust produced by cutting of the coal cutter is extracted and processed by the extracting dust removal blowers, so that the dust concentration on a coal face is effectively reduced, the dust control system is formed, and at the same time, the visibility of the working face is improved.

Description

technical field [0001] The invention relates to a spray dust reduction technology, in particular to an air-water injection device and a dust control system used for cutting dust produced by a coal shearer. Background technique [0002] At present, the dust concentration of fully mechanized mining face can reach 2500 mg / m without dust prevention measures in coal mining face in my country. 3 ~3000mg / m 3 , Coal cutting by coal shearer is one of the main links of dust production. In order to reduce the dust concentration at the working face, reduce the harm of dust to workers and equipment, and avoid dust explosion accidents, most coal mines at home and abroad apply spray dust suppression technology near the shearer. [0003] Ordinary spray dust reduction technology mainly relies on the collision and contact of water mist and dust particles to complete dust reduction. During the operation, a large amount of water mist needs to be generated near the shearer. This method increas...

AI Technical Summary

Problems solved by technology

In fully mechanized mining or fully mechanized excavation working faces, the particle size of coal dust or rock dust below 7.07 μm is the most harmful to the human body, and the particle size of the droplets produced by the commonly used spray nozzles is generally greater than 100 μm. The field concentration is small and the dust cannot be effectively suppressed

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