In sewage treatment plants, in the sodium hypochlorite feeding system, when the concentration of sodium hypochlorite needs to be diluted to 1%, it is easy to cause salt solidification in the conveying pipeline and storage tank. As gas accumulates in the system to cause various hazards, it is easy to cause gas processing problems. In this case, a pump that is not affected by gas processing and crystallization and has good chemical corrosion resistance is required. Accumulate in the pump head. Due to its own characteristics, the peristaltic pump can be easily competent in this process.