By Bento, Luis San Miguel
Posted on 2009-12-08 Last edited on 2010-08-10
On heating surfaces of evaporators, vacuum pans and other heating equipment some compounds in solution can precipitate forming incrustations or scale. This scale normally has a lower heat conductivity than metal from the equipment and heat transfer will decrease as scale forms. To minimize this problem periodical mechanical and/or chemical cleaning is necessary. This is a great inconvenient as the equipment must stop for cleaning. Therefore, capacity decreases or extra equipment is necessary.
Major components in scale of cane sugar mill evaporators are (Rein P., 2007; Doherty, 2000):
- In the first effects: Calcium phosphate (first two effects)
- In the last effects: Silica (last and penultimate effect)
Rein P., 2007, Cane Sugar Engineering, Verlag Dr.Albert Bartens KG, Berlin
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