The invention relates to an oily
sludge treatment system which comprises a
sludge dewatering and deoiling device, a
cyclone separation device and a
tail gas treatment device, the
sludge dewatering and deoiling device comprises a condensation cavity, a second-stage heating cavity and a first-stage heating cavity which are sequentially arranged in a sleeving manner, the first-stage heating cavity is used for heating and
dewatering primary sludge, the second-stage heating cavity is used for heating and
cracking oil in the first-stage sludge, and the condensation cavity is used for cooling first-stage gas and second-stage gas; the
cyclone separation device comprises a
cyclone cylinder and is used for carrying out oil-gas-water separation on the oil-water-gas mixed liquid; the
tail gas treatment device comprises a
tail gas
barrel used for purifying acid
waste gas components in tail gas. The oily sludge
treatment system realizes integrated treatment of
sludge dewatering, oily liquid
recovery and tail gas purification, and the
sludge dewatering and deoiling device not only realizes
continuous operation of water and oil in sludge and improves the sludge treatment efficiency, but also enables the secondary heating cavity to utilize heat of the primary heating cavity and saves the operation treatment cost.