The rotating bell sand remover is a newly introduced technology, used in water supply and drainage projects to remove most sand particles above Caliber 0.2mm, with a removal rate of more than 98%. The sewage enters from the tangential direction of the grit chamber and has a certain flow rate, which generates centrifugal force on the sand particles, causing the heavier sand particles to settle into the sand collection tank at the bottom of the pool along the wall and the unique structure of the grit chamber, while preventing fine sand particles from sinking. Shen. The advanced air lifting system provides good conditions for the discharge of sand and directly transports the sand to the Sand Water Separator equipment to achieve complete separation of sand and sewage. During operation, the bell-type desander Series has high inlet and outlet water flow rates, large throughput, good sand output, small footprint, simple equipment structure and energy saving, reliable operation, easy to operate and maintain, and is suitable for use in large, medium and small sewage treatment plants.