Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator ?
Correct answer: C. Agitated film evaporator
- A. Long vertical evaporator
- B. Horizontal tube evaporator
- C. Agitated film evaporator
- D. Calandria vertical tube evaporator
Explanation
An agitated film evaporator uses mechanical agitation to force and renew the liquid film over the heating surface, making it suitable for viscous, scaling, or salting liquors. The other listed units generally rely on natural circulation or conventional film flow.
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