A pretreatment method and device for producing bio-jet fuel from oil waste

Abstract

The application discloses a pretreatment method and device for producing bio-jet fuel from oil waste, and relates to the technical field of bio-jet fuel production, which comprises the following steps: S1, feeding oil waste, water and hydrochloric acid into an acidification settling tank at a set ratio, standing and depositing, and obtaining upper oil; S2, filtering the oil and feeding the filtered oil into an alkali washing and emulsifying tank 3, adding lye and water into the alkali washing and emulsifying tank 3 to neutralize the oil, and obtaining neutralized oil; S3, coalescing and demulsifying the neutralized oil, separating oil and water, extracting upper clear oil, and filtering the clear oil; S4, performing electric desalting treatment on the clear oil, and obtaining refined oil; S5, feeding the refined oil into a hydrogenation and deoxygenation device after dehydration and drying treatment, performing hydrogenation and deoxygenation treatment, and obtaining qualified bio-jet fuel; and during the hydrogenation and deoxygenation treatment, part of the refined oil is extracted from the hydrogenation and deoxygenation device, desalted and dehydrated by cyclone, and then recycled into the hydrogenation and deoxygenation device, so that the content of salt substances in the oil is reduced.

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