Pipeline static mixers are made of three types: FRP, carbon steel and stainless steel. The use of FRP material has the advantages of easy processing, durability, corrosion resistance, etc. The pipeline dynamic mixer is not made of SS316 and is composed of a motor, a chamber and an injection stirring mixing fan blade. Variable frequency control, automatically adjusts the ratio according to the flow rate in the pipe. Motor power is optional from 1.5kw-7.5kw. Scope of application 1. Mix various coagulants and coagulants in urban domestic water and industrial water supply treatment 2. Various coagulants and coagulants are added to municipal domestic sewage and industrial wastewater treatment for mixing; 3. Water supply and drainage, gas-water mixing in environmental protection projects, adding liquid chlorine, ozone and other chemicals for disinfection treatment; 4. Acid-base neutralization and mixing of industrial wastewater; 5. Several types of industrial wastewater are mixed and homogenized.