Waste engine oil staged recovery treatment system for chemical production

The invention discloses a waste engine oil staged recovery treatment system for chemical production, and relates to the technical field of chemical engineering. A staged treatment unit with an open top is fixedly mounted on the top end surface of an equipment bearing movable platform, and an oil-water primary separation unit is fixedly mounted on the top end surface of the staged treatment unit; and an odor treatment heat energy recovery unit is fixedly mounted on the top end surface of the equipment bearing movable platform and is positioned on the other side of the staged treatment unit. During actual use, according to the treatment sequence of engine oil, the method sequentially comprises the following steps: separating oil and water in the waste engine oil on a physical level, precipitating sewage, carrying out secondary evaporation dehydration on the waste engine oil, carrying out electrolytic purification on the separated sewage on a chemical level, and carrying out dosing purification on the waste engi