【Daily Question】Production, Storage, and Transportation – 20190729
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The AC version of Production, Storage and Transportation offers a question per day; answering it correctly earns 5 wealth points； Effective participation grants 2 units of wealth ； Extra points will be given to those who provide a reasonable explanation first. Multiple-choice question: Compared to single-effect evaporation, under the same conditions, multi-effect evaporation ( ) (A) has a greater production capacity; (B) makes more efficient use of thermal energy; (C) requires lower equipment costs; (D) is easier to operate. (B) Makes more efficient use of thermal energy
Heated steam is introduced into an evaporator, causing the solution to boil. In multi-effect evaporation, the secondary steam can be used as heating steam and fed into another evaporator; as long as the pressure in the evaporation chamber of that latter evaporator and the boiling point of the solution there are lower than those in the original evaporator, the secondary steam can serve as a heat source for heating.
(B) More efficient utilization of thermal energy
(B) More efficient utilization of thermal energy