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CAT NO: DIDACTICHeat Equipments0024
Multi Effect Evaporator.
Multi Effect Evaporator
Evaporation deals with the concentration of a non-volatile Solute
from a solution by the removal of required amount of volatile solvent
Usually the solvent is water. By vaporizing a part of the solvent,
useful product i.e. the concentrated solution or thick liquor is
produced and the Vapour is discarded. Lung tube evaporators are usually
used for the concentration of foamy liquids. The set-up is consists of
two evaporators fitted in series. Each is made up of Stainless Steel
tubes surrounded by a Stainless Steel jacket and fitted with
accumulator. Dilute solution is feed to the first evaporator. Steam
from. a steam generator is supplied to evaporator to concentrate the
dilute feed solution to a desired level. The jacket is fitted with a
steam trap and the condensate is collected at the end of trap. The
vapours of volatile solvent produced in first evaporator are supplied to
the second evaporator. The vapours of volatile solvent are condensed in
a shell & tube type condenser and the balance non-volatile solute
collected in the accumulator is recycled through the evaporator.
Experiments
To concentrate a solution and to evaluate the following at steady state:
Material and Heat Balance
Economy and the capacity of the evaporator for different feeding arrangement
Overall heat transfer co-efficient.
Utilities Required
Water supply 10 lit/min (approx.) and Drain
Electricity Supply: 1 Phase, 220 V AC, 3-6 kW
Required Chemicals
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