Scraper Thin Film Evaporator Information:

Details

Scraper thin film evaporator

Scraper thin film evaporator, it is a very adaptable evaporator, such as high viscosity, heat sensitive and easy crystallization, scaling materials are suitable. It is mainly composed of a heating jacket and a scraper, the jacket through the heating steam, the scraper is installed on the rotating shaft, the scraper and the heating jacket inner wall to maintain a small gap, usually 0.5 ~ 1.5 mm. After preheating, the material liquid is added by the upper part of the evaporator along the tangential direction. Under the action of gravity and rotating scraper, the material liquid is distributed in the inner wall to form a backspin film, and it is continuously evaporated and concentrated in the process of falling. The liquid is discharged from the bottom and the secondary steam escapes from the top. In some cases, this evaporator can steam the solution to get a solid product directly at the bottom.

Working principle: 

Material enters the horizontal evaporator continuously from the large-diameter end, [4] is accelerated and distributed by the scraped diaphragm and immediately forms a thin flowing film on the heating surface. Cone type film evaporator, relying on the rotor to apply a centrifugal force to the material, this centrifugal force has two effective, one perpendicular to the heating surface, the other towards the direction of the large diameter end body (note: The same results appear in vertical cone film evaporators) rely on these forces to produce material acceleration, and the incoming material ensures that the heating surface is sufficiently wet, independent of 

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