Provided is a water-saving clarification and purification
system and a process thereof. Chemicals are added to to-be-treated
raw water in a
raw water tank and mixed through a multi-section type
pipe mixer, the water enters a
flocculation reactor with vanes having variable bore diameters for
flocculation through rotational flows, then enters a
sediment separator for
solid-liquid separation, and finally is filtered through a filter, and output water enters a
clean water tank to be used. Mud
slag separated through the
sediment separator is concentrated through a mud accumulation bucket, after concentration, a part of active mud
slag flows back to the
flocculation reactor through a circulation device, the remaining mud
slag is pressed and filtered through a pressing and filtering device, and filtrate flows to the
raw water tank, and filter
backwashing drain water flows back to the raw water tank. The steps of mixing, flocculation,
sediment and filtering are achieved in an integrated high-efficiency clarification and purification device. By means of concentration, circulation and
backwashing of the mud slag,
water content of the remaining mud slag is reduced. The filtrate of the pressing and filtering device and
backwashing water of the filter are recycled to the raw water tank so that exterior
drainage rate of the clarification and purification process is greatly decreased and
water saving performance of the water-saving clarification and purification
system is improved. Compared with a traditional coagulation clarification process, the process has good
water saving performance.