Question: Please answer completely and legibly. 1. Reverse feed double-effect evaporator is used to concentrate a feed of 10% solids to evaporator, each of which has

Please answer completely and legibly.

Please answer completely and legibly. 1. Reverse feed double-effect evaporator is used

1. Reverse feed double-effect evaporator is used to concentrate a feed of 10% solids to evaporator, each of which has a surface area of 800ft2. Both the rise in boiling point and the heat of solution may be regarded as insignificant. The feed enters the 2 nd evaporator at 100F, and steam enters the first evaporator number 1 at 100 psi. The 2 nd evaporator's vapor space is under 2 psia of pressure. Assume that liquid water has the same thermal capacity as all other liquid solutions. Determine the solution's feed rate (F) and product rate (L1) for a 20% solids solution. Initial assumptions for feed rate and inlet steam temperature are 1000lbm/hr and 350F

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