A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator__________________?
Correct answer: D. Both B. & C.
- A. Is economical in operation
- B. Employs high velocity, high heat transfer rate and less heating surface requirement
- C. Employs a centrifugal pump placed between external downtake from vapor drum and inlet to
- D. Both B. & C.
- E. tube bundle
Explanation
Forced circulation evaporators use a centrifugal pump to drive liquor through the tube bundle at high velocity, increasing heat-transfer coefficients and reducing the required heating surface. Hence both statements B and C describe the equipment.
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