The Improved Design of a Mist Dust Removal Device for Coal Mining

With the development of a fully mechanized mining face, comprehensive mechanized mining face, and high-capacity and high-efficiency mining face in the coal mine, the level of mechanization and productivity is being improved, as well as dust capacity. If dust density is not reduced, it will be a hazard to the respiratory system of the miners seriously, even trigger pneumoconiosis, and the normal running of pieces of equipment will be affected, accelerating insulation equipment aging, and causing an explosion. Miners’ health and safety, normal running of equipment, and economic efficiency are being injured severely. Mist dust removal is the most widely used in coal mining, and it has been proven very effective. But the dust removal effect is affected because of the low interference resistance of the light control sensor, and small application scope of the solenoid valve, low agility of the spray device. In the paper, mist dust removal from coal mining was selected as the research background, and dust concentration detection and mechanism of mist dust removal were studied. The light control sensor, dust concentration sensor, and spray device were improved. By the mist dust removal device, online and real-time dust concentration monitoring can be achieved, and automatic dust removal can be realized according to the dust concentration. So, the dust concentration can be effectively reduced, working conditions can be improved, and safe production in enterprises and miners’ health can be guaranteed. The main work of the paper includes the following aspects. ① the paper studied the application background and research actuality of dust removal at home and abroad, and analyzed the existing technology of dust removal, and pointed out the research aim and main content. ②  to provide academic support for the improved design of a mist dust removal device, the paper analyzed dust concentration detection, mechanism of mist dust removal and main affecting factors of dust removal. ③ Through needs analysis, the paper presented overall architecture and functional module design. ④ Control module, dust concentration sensor, light control sensor, and spray device were improved. at the same time, the performance tests were also discussed. ⑤ the paper run the laboratory tests and field tests, the test results showed that the device can measure dust concentration truly, and realize automatic dust removal, and reduce the dust concentration effectively.