The manual mud valve of the sedimentation tank of the domestic water plant has low automation, high labor intensity, and high failure rate of the mud valve. (Because it uses the principle of lever operation, the valve groove is often stuck with sand or foreign matter, which is easy to wear, and the operator uses excessive force. For major reasons, the gate valve is often broken to make it leak). After using the electromagnetic pneumatic rapid sludge discharge valve, the failure rate of the electromagnetic pneumatic rapid sludge discharge valve is low (the valve has no groove and uses a pressure sealing ring); through the GE-102 ultrasonic sludge sounder, the sludge interface in the pool The position is continuously detected online to provide real-time measurement data for related processes, thereby optimizing the control of mud discharge and dosing, and then through the mud layer control of the sedimentation tank for effective adjustment and control, improving the sedimentation efficiency, saving the dosage of chemicals, and optimizing drinking water quality.