4.12. Nature of the feed

Foaming tendency
For foaming to occur it is necessary for gas bubbles to be formed, and for the drainage of the liquid films surrounding the bubbles to be retarded. Drainage of the films is slower in highly viscous liquids, but the chief causes of foaming are surface properties, which are usually unpredictable. For this reason the foaming tendency is best judged on the basis of experience of similar cases. Laboratory tests may also give an indication of the foaminess of the system.

Table 4.6

Performance Comparison of Various Separators

KO DrumWire Mesh DemisterVane-Type DemisterCycloneVertical Multi- Cyclone SeparatorFilter Separator
Gas handling ...

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