It is the pioneer product in China solving the problem of refining distillation of high boiler with strong corrosion and heat instable chemicals, which can greatly promote the recovery efficiency and quality of high boiler and heat instable chemicals, covering the advantages as: 1. The high vacuum and low temperature evaporation can make the compound difficult to decompose, so the product has high recovery efficiency. 2. The evaporation area is large with high efficiency. 3. The material retention time is short