Film evaporator

The utility model discloses a film evaporator. Thin film evaporator comprising a thin film evaporator body, a feeding pipeline and a discharging pipeline are connected to the outer portions of the twosides of the film evaporator body correspondingly. The exterior of the discharging pipeline is connected with a cold hydrazine main body; the cold hydrazine body comprises a cold hydrazine inlet pipe, a cold hydrazine separation pipe is connected to the outer portion of the lower portion of the cold hydrazine inlet pipe in an embedded mode, a material outlet pipeline is connected to the upper portion of the side edge of the cold hydrazine separation pipe, an oil wax outlet pipeline is connected to the lower portion of the bottom end of the material outlet pipeline, and a vacuum unit is connected to the outer portion of the side edge of the material outlet pipeline. The film evaporator can condense oil wax brought out from an outlet of the film evaporator and prevent the oil wax from entering a vacuum unit to dama