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Heat transfer to boiling liquid in evaporators. Physical and pharmaceutical factors affecting evaporation. Classification and study of pan, forced circulation, film, vacuum and multiple effect evaporator. Entrainment, prevention of foam and steam traps. Discuss the factors affecting evaporation. With a neat sketch describe the working principle of a standard type vertical evaporator.
Basic concept of phase equilibria, factors affecting evaporation, evaporators, film evaporator, single effect and multiple effect evaporator. Theoretically, evaporation means simply vaporization from the surface of the liquid. Evaporation is an unit operation by which a solvent is evaporated from a solution by boiling the liquor in a suitable vessel and withdrawing the vapor, leaving a concentrated liquid residue. To make a solution more concentrated. Generally extracts are concentrated in this way.