Vacuum concentration equipment for preparing composite melittin

The invention relates to vacuum concentration equipment for preparing composite melittin, the vacuum concentration equipment comprises an extraction tank and a concentrator, and the top of the extraction tank is provided with a feed liquid pipeline, a gas outlet pipeline, a first heating pipeline and a feed inlet. A bee venom raw material in the extraction tank can be heated through steam of the steam generator, and the extraction tank is of a double-layer structure and is formed by combining an inner tank and an outer tank; the bee venom raw materials can be uniformly heated by steam of the steam generator; the extraction tank is connected with the solvent storage tank, so that the filling process can be simplified, a heated bee venom raw material enters the first condenser, is subjected to gas-liquid conversion by the first condenser and then is cooled in the cooler, and an oil-water separator is matched with a filter to filter impurities, so that the purity of the bee venom is further improved; vacuum conc