The invention relates to a process for treating oily
sludge through hot steam. The process comprises the following steps that an oily
sludge stock solution is pumped into a pre-
treatment system through a pipeline, and the
dehydration rate of
sludge reaches 93% to 98% under the
process conditions that the
sound intensity ranges from 0.5 W / cm<2> to 0.8 W / cm<2>, the frequency ranges from 5 kHz to 25 kHz, the action time ranges from 3 min to 8 min, the
demulsifier dosage ranges from 0.2% to 0.7%, the temperature ranges from 60 DEG C to 80 DEG C, and
sedimentation is conducted for 1 h to 2 h; then the oily sludge
stock solution is sent into a smashing unit, and large particles are ground into microparticles; the pretreated dehydrated sludge is conveyed to a heat
treatment system through a closed
conveyor belt, the pretreated dehydrated sludge meets with a hot steam
jet flow vertically in a treatment trough of the heat
treatment system, the oily sludge is directly decomposed into individual components, and
organic matter such as heavy oil and
asphaltene in the oily sludge is subjected to
pyrolysis under the action of a mesoporous
pyrolysis catalyst. According to the process, water of oily sludge is efficiently removed, the
treatment intensity of the subsequent process is reduced, most of
crude oil in the oily sludge can be recycled, the
organic matter such as the heavy oil and the
asphaltene can be subjected to
pyrolysis due to high temperature heating, and the efficiency and quality of recycled
oil can be improved.