Vertical -flow sedimentation basin

The utility model discloses a vertical -flow sedimentation basin, including the sedimentation tank cell body, toper collection mud groove, the center draft tube, the inlet tube, the outlet pipe, arrange the mud device, rectangle overflow weir and water catch bowl, the tangential is connected with an inlet tube on the side of center draft tube, it serves and is equipped with a return bend to lie in central draft tube inside on the inlet tube, the return bend opening is vertical upwards, the open end of return bend is equipped with a horn mouth no. 2, the draft tube inside return bend below that is located in center is equipped with a screw -tupe fin, it includes mud pipe no. 1 to arrange the mud device, mud pipe no. 2, mud pipe no. 3, trachea and conveyer pipe, three vertical fixations of mud pipe are on the intermediate position of mud pipe no. 2, the vertical mud pipe no. 1 that is equipped with is gone up to mud pipe no. 3, the top of mud pipe no. 1 is connected with a horizontal movement pipe, mud pipe low