Oily sludge treatment and washing technology (WRT Technology ™) can achieve lower investment and operation cost, and recover as much crude oil as possible. Craun oily sludge treatment equipment is a multi-stage chemical washing process, and then through multi-stage separation to achieve solid, oil and water separation. The oil content of the separated residue can be as low as 2%. Integrated skid mounted design, samll footprint and flexible layout.