In the sewage treatment industry, slurry pumps are widely used in the pumping process of sludge and suspension. For example, in municipal sewage treatment plants, slurry pumps are used to extract sludge containing solid particles from the settling tank or the bottom of the settling tank and then transport it to the sludge treatment equipment for treatment. In industrial wastewater treatment, slurry pumps are used to deliver waste water pumps containing granular materials to filters or other treatment equipment to purify wastewater and improve water quality.