关键词: 稠油污泥, 脱水, 干化剂, 脱水油泥

Abstract: A dehydration-drying treatment for oily sludge was proposed using oily sludge from the settling tank of an oilfield sewage plant as research object. The effects of dehydration agents and amount, cationic polyacrylamide (CPAM) dosage, curing agents and amount on the treatment were investigated. It was found that using 2% of an optimal dehydration agent A, under the conditions of adding 200 mg/L CPAM prior to high speed stirring and 400 mg/L CPAM prior to low speed stirring, the water content of dehydrated oily sludge was reduced to 65% from the original of 85%. During the drying tests, adding 5% CaO or mixing with breeze (with a mass ratio of sludge/breeze=1/1.5), drying under sunlight for 3-4 h and calcination at 800 ℃ for 10-15 min, the obtained granules were combustible, thus the oily component in sludge was fully reused.

Key words: heavy crude oily sludge, dehydration, solidification agent, dehydrated sludge