| 摘要 |
Used Motor Oil (UMO) is reprocessed by vaporization and partial condensation. The UMO vapor fraction from the thermal reactor (10) may contain gasoline and chlorinated solvents, and will contain vaporized lubricating oil boiling range components and surfactants or other additives in an amount sufficient to form an emulsion if the UMO vapor is condensed to a temperature sufficient to produce a liquid water phase. Partial cooling of the vapor in heat exchange means (20), at a temperature above the boiling point of water, ensures that a dry, emulsion-free, liquid hydrocarbon product is produced. The vapor phase remaining, after condensation of the lube oil boiling range hydrocarbons in the hot separator (30), is then condensed to produce a liquid phase, which can be processed in conventional wastewater treatment facilities. The process permits re-refining of UMO by vaporization without venting or flaring any vapor streams directly derived from the UMO process. |
