With the development of modern industry, the prevention of environmental pollution has become a common concern of people. At the same time, it is an important way to make comprehensive utilization, to be harmful, to be useful, to be useful, to save investment, to save energy and to improve economic efficiency. In a lot of metal surface treatment products (pickling, electroplating, chemical milling process, etc.) need to use sulfuric acid, hydrochloric acid, nitric acid, acid gas will escape from a certain concentration, the content of acid gas exceeds the standard, causing serious harm to human health, animal and plant growth and buildings will be so. More and more countries to be of great importance.I often set in the relevant scientific research units to assist, successfully developed BJS series of mist purification tower, the purification tower made of glass steel and polyethylene material. It has the advantages of high purification efficiency, high corrosion resistance, high strength, low noise, low power consumption, small size, convenient disassembly and assembly, beautiful appearance, and so on. At present, there are 1.5 types of models, type 3, type 5, type 7.5, type 10, type 20, type 30, type 40, type 50 and type nine. BJS type mist purification tower processing harmful gas for acid (H 2 SO 4) (HCL), hydrogen chloride, and hydrogen fluoride gas (HF) gas, chromium acid (GrO 3), hydrocyanic acid (HCN), hydrogen sulfide (H S 2) and ammonia (NH 3), the water soluble alkali vapor gas.Sodium hydroxide is used as absorption solution, the solution concentration is 2~6%, and the purification efficiency is above 95%. The purification tower adopts production, the external surface of the tower with water resistance, anti aging aging gel coat resin layer, coating layer thickness not less than 0.5mm, the strength layer and the inner surface and the outer surface of the inalkali wax twistless box as anti-aging coating cloth, the resin content of not less than 75%, the number of laying by large technology the standard requirements, the resin content was 60~70%, the strength of the tower body is absolutely reliable.