Vacuum pyrolysis of oil sludge

The vacuum pyrolysis of oil sludge was investigated.The effects of technical conditions such as final pyrolysis temperature,system pressure,holding time and condensation temperature were discussed in details.The experimental results show that when vacuum pyrolysis is carried out at pyrolysis temperature of 500 ℃,system pressure of 10 kPa,holding time of 30 min,condensation temperature of ?20 ℃,the yields of pyrolysis solid,pyrolysis liquid and pyrolysis gas are 9.4%,85.8% and 4.8%,respectively.After separation of water from pyrolysis liquid,pyrolysis oil with the content of 31.25% of oil sludge can be obtained.All the materials from oil sludge can be satisfactorily recycled by vacuum pyrolysis.