Sedimentation tank blowdown equipment

The utility model belongs to the technical field of accessories of a sewage treatment system, provides sewage discharge equipment for a sedimentation tank, and aims to solve the problem that sludge in the existing sedimentation tank is inconvenient to clean. The utility model relates to sedimentation tank pollution discharge equipment, which comprises a sedimentation tank, a pollution discharge device is arranged on the sedimentation tank, the pollution discharge device discharges sludge settled in the sedimentation tank, the pollution discharge device comprises a conveyor belt and a driver for driving the conveyor belt to rotate, and the pollution discharge device further comprises a sludge receiving box for collecting the sludge conveyed by the conveyor belt, the conveyor belt comprises a first horizontal section located at the bottom of the sedimentation tank, a second horizontal section located outside the sedimentation tank and located above the mud receiving box and an inclined section located between t