Process method and device for continuous production of N-ethoxy oxalyl-L-lactamic acid ethyl ester

The invention discloses a process method and device for continuous production of N-ethoxy oxalyl-L-lactamic acid ethyl ester. Benzene is used as a dehydrating agent; raw materials are dissolved in a material preparation kettle for preparing raw material mixed liquid; the prepared raw material mixed liquid is conveyed into a preheater for preheating; the materials are heated to 70 to 85 DEG C through a reboiler for continuous reaction; the benzene is conveyed into a reaction rectifying tower; the benzene is used as a dehydrating agent for continuously removing moisture generated through reaction; water generated through reaction is discharged out through steaming from the tower top of the reaction rectifying tower in a benzene, ethanol and water ternary azeotrope form; after the condensation by a condenser, automatic phase splitting is performed through a conglomeration phase splitter; after the phase splitting, a benzene phase containing little water and ethanol at an upper layer flowsback to the reaction rec