Graded rectification and extraction device for plant effective components

According to the plant effective component grading rectification extraction device, after being heated in a heating bin, materials are rapidly boiled in a vacuum environment to form steam with different components, due to different boiling points, the components with high boiling points are firstly condensed into liquid and are recovered by a liquid collecting tank, and the effective components are sequentially rectified and condensed according to the boiling points; and finally, the component with the highest boiling point enters the condenser I and is condensed into a liquid state, so that the multi-stage rectification extraction effect is achieved. In the separation process of the middle stages such as the second stage and the third stage, the separated and condensed liquid components enter the local heat exchangers in the upper stage to serve as cooling media, and due to the fact that the boiling points are close, the effective components in the middle local heat exchangers are accurately condensed, the r