This operation is used to simulate thin film evaporation. Thin film evaporation is a modified falling film evaporation process in which feed enters the top of the jacketed evaporator section and via agitation spreads into a thin turbulent film. The concentrate flows down the bottom outlet of the evaporator and the vapor exits from the top.
● Thin Film Evaporation Procedure
Material and Energy Balances
The model consists of the same set of equations eq. (A.273)- eq. (A.277) as the Flash operation (see Flash Evaporation: Modeling Calculations).
The sizing variable of the evaporator is the heat transfer area, A. In Design mode, the heat transfer area is calculated byeq. (A.279).
The interface of this operation has the following tabs:
● Oper. Cond’s, see Thin Film Evaporation: Oper. Conds Tab
● Toolbox, see Flash Evaporation: Toolbox Options Tab
● Numerics, see Flash Evaporation: Numerics Tab
● Labor, etc, see Operations Dialog: Labor etc. Tab
● Description, see Operations Dialog: Description Tab
● Batch Sheet, see Operations Dialog: Batch Sheet Tab
● Scheduling, see Operations Dialog: Scheduling Tab