... in to liquid through three stages cooling, they’re separately stored in water, gasoline/diesel, light lube oil, heavy lube ... Gasoline engine oil, diesel engine oil etc. all waste lube oil);2,No secondary pollution during processing:No waste gas, water ... tower,distillation kettle,circulation pump,heat exchanger;4,Cooling system:water pump,cooling water reservoir,first stage cooler,second stage cooler; ...