Thin Film Evaporator, Wiped Film EvaporatorIntroduction
Since their introduction more than 50 years ago by Luwa and Samesreuther, today Buss-SMS-Canzler, Thin Film Evaporators, which are also frequently called wiped film evaporators or agitated thin film evaporators have become a generally recognised and accepted solution for difficult and demanding process problems in the areas of distillation, concentration, degassing, drying and reactions.
Buss-SMS-Canzler offers the widest range of different types of Thin Film Evaporators available worldwide, such as: - different types of rotor to suit a wide range of different applications
- vertical or horizontal construction
- cylindrical or conical design
- counter or co-current working principle
Features
Thin Film Evaporators differ in the following main technical features from other evaporator types: - Continuous and trouble-free processing of viscous, fouling and contaminated fluids by high turbulence in the liquid film, which also reduces the required temperature difference accross the heating surface;
- Gentle product treatment because of the short residence time and the narrow residence time spectrum in the whole equipment;
- High evaporation performance because of high surface heat flux;
- High evaporation ratio in a single pass;
- Minimum losses in case of product change because of the low hold-up.
Operating Window
Buss-SMS-Canzler Thin Film Evaporators can be used within the following range:
Operating parameters | Operating window | Feed rate kg/h | 20 - 100.000 | Evaporation rate kg/h | up to 40.000 | Heating temperature °C | up to 380 1) | Pressure on process side barg | -1 to 30 | Product viscosity at operating temperature mPas | up to 70.000 | Residence time min | < 1 2) | Evaporation ratio (concentrate/feed) | up to 1:50 3) | Through put % | 20 - 100 3) |
1) evaporators with electrical inductive heating up to 600 °C
2) in horizontal evaporators longer residence times possible
3) depending on evaporator type to top
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