During the dehydration process, fine gypsum particles can clog the filter cloth. After the filter cake has fallen off, the filter cloth should be cleaned before and after. After the filter cloth is regenerated, return to the original position and rinse the filter cloth with a cleaning tube. In front of; another cleaning tube is used to rinse the other side of the filter cloth. It is installed below the discharge end of the vacuum belt dewatering machine. The nozzles are arranged according to the water pressure and flow rate and the distance between the nozzle and the filter cloth and the spray angle. The water flow from the nozzle should be fan shaped and the adjacent fan spray areas should overlap. The gypsum particles remain in the grooves of the belt and also require rinsing. In order to ensure the moisture content and chloride ion content of the filter cake, a filter cake cleaning device is provided.
The calibration system for the filter cloth is a pneumatic control system. The system consists of a baffle arm and a pneumatic control valve, air bag and rubber correction roller. The arm is always in contact with the filter cloth and its rotation controls the pneumatic control valve such that one end of the balloon expands at one end and the air contracts at one end. The deviation of the filter cloth (reciprocation of the filter cloth) is completed by the correction roller, and the self-aligning bearing housing is fixed to one end of the frame, and the other end is connected to the deviation of the airbag to automatically move to the correct filter cloth. The limit switches are mounted on both sides of the vacuum belt dehydrator frame. When the filter cloth is severely deflected, the limit switch will be squeezed to stop the vacuum belt dewatering machine.