： Structure :
The grit chamber consists of the inlet, the outlet, the grit area, the sand bucket, the turbine drive device, and the sand removal system. Sewage flows into the grit area from the direction of the tangent of the inlet, and a drop weir is set up in the water inlet channel, so that the sand that may be deposited at the bottom of the channel slides downward into the grit basin; a baffle is also provided to allow the water flow and sand to enter the grit basin. Popular to the bottom of the pool and strengthen the wall effect. A speed-adjustable paddle board is provided in the middle of the grit chamber to keep the water flow in the tank in a circular flow. The paddle board, the baffle and the inlet water flow are combined. The rotating turbine blades make the sand particles flow in a spiral shape, which promotes the separation of organic matter and sand particles. Due to the different centrifugal forces, the relatively dense sand particles are thrown towards the pool wall. Gravity sinks into the sand bucket; lighter organics are separated from the sand in the middle of the settling pond, and the organics are carried out of the pond with the vortex of the effluent. By adjusting the rotation speed, the best sand setting effect can be achieved. The sand settling in the sand bucket can be removed by air lifting, sand pumping and other methods, and then separated by sand and water to achieve the standard of clean sand drainage.
： Advantages of swirling sand settling pond :
( 钟氏及比氏 ) 具有占地省、除砂效率高、操作环境好、设备运行可靠等特点， The swirling sand settling tank ( Zhong's and Bi's ) has the characteristics of land occupation, high sand removal efficiency, good operating environment, and reliable equipment operation.
1. Strong ability to adapt to flow changes;
6mm ； 2. Small head loss, typical loss is only 6mm ;
140 （ 0.104mm ）目的细砂也可达 73% ； 3. Fine sand removal rate is high, and fine sand with 140 ( 0.104mm ) mesh can reach 73% ;
4. High kinetic energy efficiency.