The principle is to heat at constant temperature under vacuum conditions, so that the rotating bottle rotates at constant speed, the material forms a large area of film on the bottle wall, and the efficient evaporation. The solution steam is cooled by the high-efficiency glass condenser and recycled in the collection bottle, which greatly improves the evaporation efficiency, and is especially suitable for the concentration and purification of biological products that are easily decomposed and denatured at high temperature.
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