... pretreatment,waste oil pumped into the distillationKettle,heati to working temperature,can get the base oil , ... quality.this is the most advanced technology in the world in the waste oil recycling line,and ... coal,gas or fuel oil to make the oil in the kettle up to the working temperature.this system ... . Filtration system:rapidly filter out mechanical impurities in the base oil,gasoline and diesel,get the ...