Filtering device for discharged frozen mother liquor

The utility model provides a discharged frozen mother liquor filtering device in the field of zero discharge of discharged frozen mother liquor treatment, which comprises a tank body, a water inlet pipe connected to the outer side of the bottom of the tank body, a blow-off pipe connected to the bottom end of the tank body, a fixed frame plate fixedly arranged inside the bottom end of the tank body, and a mounting hole formed inside the fixed frame plate, a filter cartridge is placed in the mounting hole, an inner sealing ring is mounted at the top end of the filter cartridge, a limiting block is fixedly connected to the outer side of the bottom of the filter cartridge, the top cover and the tank body are fixedly connected through a fastening bolt, a water outlet pipe is arranged at the top end of the top cover, and a connector is fixedly connected to the bottom end of a water guide pipe; sodium sulfate is introduced into the tank body through the water inlet pipe to discharge frozen mother liquor, so that mir