NOVELTY - Device for methyl esterification and dealcoholization of biodiesel comprises a connecting pipeline, a methanol condenser (6) and a vacuum device. The device further comprises a conveying pump (1), a feeding valve (2), a flash vaporization tower (3) with multi-layer tower distribution plate (32) and an inner tower plate, a cup and a discharging check valve. The conveying pump outlet is connected with feeding check valve through the pipeline. The low-boiling outlet at the top of the flash vaporization tower is connected with the cup and the methanol condenser through the pipeline.    USE - The device is useful for methyl esterification and dealcoholization of biodiesel.    ADVANTAGE - The device ensures rapid and efficient dealcoholization process, ensures the removal of methanol before entering of fatty acid methyl ester into the next process and does not affect the deposition of glycerol and dissolved soap.    DETAILED DESCRIPTION - Device for methyl esterification and dealcoholization of biodiesel comprises a connecting pipeline, a methanol condenser (6) and a vacuum device. The device further comprises a conveying pump (1), a feeding check valve (2), a flash vaporization tower (3) with multi-layer tower distribution plate (32) and an inner tower plate, a cup and a discharging check valve. The conveying pump outlet is connected with feeding valve through the pipeline. The feeding valve is connected with the flash vaporization tower inlet. The low-boiling outlet at the top of the flash vaporization tower is connected with the cup and the methanol condenser through the pipeline. The bottom of the flash vaporization tower discharging port is connected with the discharging check valve through the pipeline.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the device for methyl esterification and dealcoholization of biodiesel.    Conveying pump (1)    Feeding check valve (2)    Flash vaporization tower (3)    Methanol condenser (6)    Multi-layer tower distribution plate (32)