Optimization of backwashing water treatment technology of high speed filter in hot rolling waste water recirculating system

The backwashing water treatment process of the high-pressure filter in the hot rolling waste water recirculating system was described. According to some typical cases analysis, it was found that there were some defects in the operation of the backwashing treatment process of the high-pressure filter in the hot rolling waste water recirculating system, such as the sludge accumulation in the horizontal sedimentation tank, backwashing water regulating pool, and sludge concentration tank, the water quality of waste water in hot rolling above the standard and the low sludge yield of plate-frame press filter. With the optimized process, the quality of wast water in hot rolling after the treatment by the high-speed filter of the hot-rolled water treatment system was obviously improved and the sludge discharge was increased, sludge accumulation in horizontal sedimentation tank, backwashing water regulating tank, sludge concentration tank, is reduced, sludge treatment facilities failure rate is low, thus reducing equipment maintenance and spare parts costs, realizing equipment automation operation. The results showed that new systems operated well.