Question

for which of the following purposes is an agent film evaporator sustainable​

Answer 1

Explanation:

Falling Film Evaporators

Falling film evaporators are used much like conventional evaporators, except the mechanism of evaporation in each stage is different. These evaporators are being used in many countries to produce black liquor slurry with up to 80% solids content for firing in the recovery boiler (Vakkilainen and Holm, 2000). This evaporator design relies either on tubes or on plates as heat transfer surfaces. In tubular units, liquor is processed on the inside of the surface, whereas in plate designs, the liquor is processed on the outside of the heat transfer surface.

In each stage, steam (or sometimes hot water in the first stage) is used as the heat source and flows between stainless steel plates about 30 mm (1.25 in.) apart. Large banks of these plates are aligned radially outward in each effect. Dimples in the metal plates keep the plates a fixed distance apart and increase the strength of the metal plates. Fig. 17.6 shows a section of the plates.plz mark as the brainest