NOVELTY - System for removing methanol from biodiesel based on multilayer evaporator, comprises e.g. a multilayer evaporator (4) provided with 6-12 layers of heating plates (6), where heating coils (12) and technical liquid thermometer (14) are arranged in heating plate for heating medium to go in and out. The multilayer evaporator is provided with a liquid inlet (5) facing upper layer heating plate. A conveying pump is connected with the liquid inlet by material control valve and liquid flow meter, and a gas outlet is arranged at top of the multilayer evaporator and is connected with a condenser.    USE - The system is useful for removing methanol from biodiesel based on multilayer evaporator.    ADVANTAGE - The system: has short heating time of material, and simple and easy operation; and realizes continuous process of removing methanol from biodiesel.    DETAILED DESCRIPTION - System for removing methanol from biodiesel based on multilayer evaporator, comprises a multilayer evaporator (4), where inside of the multilayer evaporator is provided with 6-12 layers of heating plates (6). Single heating plate is arranged at central circle and double-layer heating plates are arranged at annular sticking wall, liquid overflowing position of upper layer heating plate is corresponding to that of a next layer of heating plate. Heating coils (12) and technical liquid thermometer (14) are arranged in heating plate for heating medium to go in and out. The multilayer evaporator is provided with a liquid inlet (5) facing the upper layer heating plate. A conveying pump is connected with the liquid inlet by material control valve and liquid flow meter. A liquid outlet is arranged at bottom of the multilayer evaporator, and a gas outlet is arranged at top of the multilayer evaporator and is connected with a condenser. An INDEPENDENT CLAIM is also included for process of removing methanol from biodiesel based on multilayer evaporator, comprising: (i) passing materials through a conveying pump, the material control valve and the liquid inlet to enter the upper layer heating plate of the multilayer evaporator, where after the material is fully filled in the upper layer heating plate, it overflows and gradually flows to lower layer till the lower layer heating plate is fully filled, and then stopping charging the material; (ii) heating materials in each layer of heating plate, when condensed fluid collects in the condenser, again charging the material such that each layer of heating plate is full of liquid; (iii) when the technical liquid thermometer in the lower layer heating plate displays temperature as 100-120 degrees C, continuously charging the material, and controlling values of the technical liquid thermometers to be in graded distribution from 64-120 degrees C; and (iv) collecting liquid overflowing the lower layer heating plate to a crude biodiesel storage tank after it leaves the liquid outlet, where the liquid is methanol removed crude biodiesel, and then collecting methanol solution obtained from the condenser to a methanol storage tank.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the system for removing methanol from biodiesel based on multilayer evaporator.    Multilayer evaporator (4)    Liquid inlet (5)    Heating plates (6)    Heating coils (12)    Technical liquid thermometer (14)