In an innovative combination of 2.4G high frequency wireless transmission and digital voice broadcasting, the wireless transmission of voice broadcasting system and voice communication will help the rescue of trapped people in the event of underground power failure, local collapse, people trapped, power and traffic obstruction and other emergencies in large foundry. The key development issue is the distance that communication signals can travel through the collapse, and the high frequency signals can only travel through a few meters of the collapse. Rock mass signal long-distance transmission is an urgent problem to be solved. Therefore, we need expert support from 2.4G high frequency wireless transmission to solve the project bottleneck. The GJD tubular electrostatic precipitator produced by our company has been used in pellets, sintering machines, lime kilns and other production lines of casting co., LTD. Supporting equipment technology reached the international level, won the user's praise. Three scales of flue gas desulfurization system of desulfurization precipitator are solved: 1) dust scale at the inlet of absorption tower, dry and wet joint; 2) gypsum scale; 3) Calcium sulfite and sulfuric acid are mixed and crystallized.