System for treating oily solid material and method for treating oily solid material

A method for treating oily solid material, comprising:

• filling a heat treatment chamber of a vertical furnace body with an oily solid material to be treated, wherein the heat treatment chamber is enclosed by a top wall, a bottom wall and a sidewall connecting the top wall and the bottom wall, and an electromagnetic induction heating coil assembly is arranged at an outer side of the sidewall of the vertical furnace body, and the electromagnetic induction heating coil assembly comprises a plurality of coil units sequentially arranged in a vertical direction;
• turning on at least part of the plurality of coil units into a heating state to heat the oily solid material to be treated in the heat treatment chamber;
• determining at least one of the at least part of the plurality of coil units which have been turned on as a coil unit to be regulated, and at least another of the at least part of the plurality of coil units which have been turned on as a reference coil unit, according to a change of filling rate of the oily solid material to be treated in the heat treatment chamber, wherein the reference coil unit is closer to the bottom wall of the vertical furnace body than the coil unit to be regulated in the vertical direction;
• and
• reducing a heating power of the coil unit to be regulated while keeping the reference coil unit in the heating state.