How does vacuum dehydration work during the starch dewatering process?

The procedures of cassava starch production are as bellow: cassava roots conveying → cleaning and washing → peeling → grinding → centrifugal sieve to remove fiber and impurities → desanding → hydrocyclone to concentrate starch and remove sundries → dewatering → drying → packaging. Vacuum dehydration is used in the starch dewatering process.

 

Vacuum dehyration

So how does vacuum dehydration work during the starch dewatering process? 

 

Step one of vacuum dehydration: Firstly starch slurry enters into the starch slot until it reaches the rotating drum. 

 

Step two of vacuum dehydration: Then starch will stick on the surface of drum by the effect of vacuum pumping and water goes into the pump. There is a layer of screen on the surface of drum to prevent starch flour going through. 

Vacuum dehydration

Step three of vacuum dehydration: Finally the scraper on side will unload starch flour during the rotating of drum. Then starch with moisture around 38% will be sent to the next process for drying.

 

With advanced technology and newly design, vacuum dehydration have advantages of low energy consumption, small area, easy-operation and stable running.

 

The vacuum degydration is widely used in all kinds of starch dewatering process and the starch manufacturing factory.