Distillation equipment is a separation technology carried out under high vacuum conditions, characterized by low distillation temperature, high system vacuum degree, short material heating time, and high separation degree; And the separation process is irreversible, with no boiling or bubbling phenomenon. Specially suitable for separating high boiling point, thermosensitive, and easily oxidizable substances, it has been widely used in various industries such as the extraction of vitamins and active ingredients in traditional Chinese medicine, petrochemicals, food industry, cosmetics industry, and agriculture.

The main features of distillation equipment are:

**Energy saving. Adopting a low resistance plate shape, reducing the kettle temperature, and establishing a distillation process that utilizes energy at all levels in a reasonable manner through appropriate reflux; Try to use instrument control or microcomputer self-control system to keep the equipment in the best load state.

Secondly, the production intensity is high. **The vapor-liquid flux per unit tower section, especially in the design of the mash tower, should pay more attention to the relationship between its vapor-liquid ratio. One of the methods to make the equipment more compact, with increased production intensity and processing capacity, is to use * * tray instead of the old tower calibration (the tower body remains stationary).

Thirdly, it has good pollutant discharge performance. While minimizing the fiber content in mature mash as much as possible, the equipment should also be considered to adapt to the distillation of fermentation broth containing solids, and minimize the number of shutdowns and tower cleaning.

Fourthly, fully consider the amplification effect of the tower. Especially for tower equipment with an annual output of over 15000 tons, due to the tower diameter being greater than 1.5 meters, active and advanced measures should be taken for large-diameter tower equipment to reduce the decrease in separation efficiency.

Fifth, the structure is simple and the cost is reduced. If the process conditions permit, choose a new type of tray with simple tray structure and high efficiency.