Oil LNG gasifaction fractional distillation apparatus

The utility model relates to an oil LNG gasifaction fractional distillation apparatus, including depropanizator, return tank and deethanizer, be provided with feeding control valve on the third pipeline, be provided with ejection of compact control valve on the fourth pipeline, be connected with the 5th pipeline between feeding control valve and the ejection of compact control valve, and be provided with the pipeline governing valve on the 5th pipeline. The utility model discloses increased the cross -line between feeding control valve the deethanizer before and the ejection of compact control valve after the deethanizer, in the time of need not utilizing component such as deethanizer desorption C2 when refined carbon no. 3, the tank field is delivered to with C3 component autogenous pressure to accessible regulation feeding control valve, ejection of compact control valve, pipeline governing valve, when needs used deethanizer, feeding control valve was opened to the closed pipeline governing valve, and it ca