A kind of oily sludge advanced treatment process
A technology for advanced treatment and sludge, applied in water/sludge/sewage treatment, dehydration/drying/thickened sludge treatment, water/sewage multi-stage treatment, etc. Improve the recovery rate, complex process operation and other problems, achieve good demulsification effect, improve recovery rate, and wide application range
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[0034] The concrete embodiment of the present invention is illustrated by taking the oil sludge at the bottom of a refinery as an example. The analysis of the oily sludge content of the feed is shown in Table 1. The weight percentage of each component of the demulsifier is: disodium fatty alcohol polyoxyethylene ether sulfosuccinate monoester (R=C 18 ) 18wt%, potassium lauryl ether phosphate (chemical formula: RO(CH 2 CH 2 O) n -PO(OK) 2 , R=C 14 , n=9) 15wt%, styrene 1wt%, oxalic acid 0.6wt%, water 65.4wt%. The dosage of demulsifier is 3% of the sludge weight. The mixing time of the demulsifier in the sludge mixing tank is 30 minutes, and the temperature of the mixing tank is controlled at about 65°C. Using the process of the present invention to treat oily sludge, the water content of the discharged mud cake is reduced to 50.3%-53.8%, and the oil content is 17.0%-21.4%, as shown in Table 2. Through material balance calculation, the volume of sludge after dehydration t...
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