Thin Film Evaporation

General Description

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.

Unit Procedure Availability

      Thin Film Evaporation Procedure

Thin Film Evaporation: Modeling Calculations

 

Material and Energy Balances

The model consists of the same set of equations eq. (A.257)- eq. (A.261) as the Flash operation (see Flash Evaporation: Modeling Calculations).

Equipment Sizing

The sizing variable of the evaporator is the heat transfer area, A. In Design mode, the heat transfer area is calculated byeq. (A.263).

Thin Film Evaporation: Interface

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