What Are The Merits Of Using A Falling Film Evaporator?

1.	What Are The Merits Of Using A Falling Film Evaporator?
Answer» The advantages of using falling film EVAPORATORS are as follows: These types of evaporators have very high heat transfer coefficients ranging from 2000-5000 W/m(square) for water and 500 to 1000 for organic liquids. The residence times are short in case of HEATED surfaces, 5-10 seconds without RECIRCULATION. They have very low pressure drops, 0.2-0.5 kN/m(square). These evaporators are well suited for vacuum operations as well. The evaporation ratios are very high. 70 per cent without and 95 per cent with recirculation. They have a very wide operating RANGE, they can provide as much as 400% of the minimum throughput. In addition to the above advantages they have a low cost of operation and are less susceptible to fouling. The advantages of using falling film evaporators are as follows:

Answer»

The advantages of using falling film EVAPORATORS are as follows:

These types of evaporators have very high heat transfer coefficients ranging from 2000-5000 W/m(square) for water and 500 to 1000 for organic liquids.
The residence times are short in case of HEATED surfaces, 5-10 seconds without RECIRCULATION.
They have very low pressure drops, 0.2-0.5 kN/m(square).
These evaporators are well suited for vacuum operations as well.
The evaporation ratios are very high. 70 per cent without and 95 per cent with recirculation.
They have a very wide operating RANGE, they can provide as much as 400% of the minimum throughput.
In addition to the above advantages they have a low cost of operation and are less susceptible to fouling.

The advantages of using falling film evaporators are as follows:

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