The Sludge Conditioning Magnetization-coagulation And Dehydration Process And Equipment Research

Dalian SKF Bearing Factory the metal chips liquid waste sludge and emulsion wastewater homemade sludge sludge dewatering to take sludge conditioning magnetic coagulation+magnetic separation device mechanical dewatering process technology, in-depth investigation and commissioned a magnetic separator for sludge dewatering and sponge iron (industrial waste, gray and black, slim and very light particles), Fe3O4(superfine, for experimental comparison), the steel recycling iron powder, debris iron powder magnetic seed sludge conditioning effect of its physical and chemical properties and composition analysis. By controlling the magnetic seed coagulant and coagulant dosage and dosing order to determine the optimal dosage of sludge conditioning and dewatering and feeding order and the mode of operation in the sludge dewatering process has been explored Inquiry by the above process, expect to explore the optimal dosage and sludge dewatering of sludge conditioning optimal dosage and run, and ultimately achieve sludge dewatering moisture content below80%.Experimental results show that:sludge conditioning coagulant, coagulant, magnetic seed dosing should take in order to achieve the best results of sludge conditioning and dewatering.SKF Bearing Factory97.1%of the the metal chips liquid waste sludge, select the best magnetic species of sponge iron, oily higher COD content should be using raw sludge+diluted times way dosing PAC, PAM, by adding appropriate amount of NaOH to control pH around7.5, the optimal dosage of PAC to22g/L, PAM to20mg/L, sponge iron optimal dosage to10g/L, the best delivery order of the sequence of PAC+the magnetic seed+PAM+stirring constantly, the conditioned sludge minimum moisture content of94.5%, the mechanical dewatering minimum moisture content of74.04%, the lowest intermittent operation mode after sludge moisture content74.04%sludge in continuous operation mode after the minimum moisture content of76.34%, should adopt a batch of sludge mechanical dewatering process.For the emulsion wastewater homemade sludge (water content was96.865%), choose the best reaction magnetic seed still sponge iron, oily higher COD content should be using the original sludge+diluted double cast plus PAC, PAM, throw to take PAC+the magnetic seed+PAM+stirring constantly order to determine the optimum reaction pH of8.0, where the best PAC dosage of25g/L, the best PAM dosage of15mg/L, the sponge iron optimal dosage of12g/L the sludge conditioning lowest moisture content of93.70%, the mechanical dewatering minimum moisture content of69.70%, including intermittent the lowest mode of operation after sludge moisture content of69.70%. the lowest continuous operation mode after sludge moisture content of72.31%, should adopt a batch of sludge mechanical dewatering process.