Heating is performed by passing steam inside the tube bundle. Noniterative design of multiple effect evaporators using excel addins. In a singleeffect evaporator, steam provides energy for. Milk condensing in vacuum pan uses high amount of steam to evaporate water. Pdf single and multiple effect evaporators pranavv. Evaporators may be composed of one or more effects, where an effect is defined as one or more bodies operating at the same boiling temperature. Noniterative design of multiple effect evaporators using. In case of a singleeffect evaporator, the vapor from the boiling liquor is condensed and the concentrated. Water evaporated in the firsteffect vapor body is condensed in the secondeffect heat exchanger, which provides energy for evaporation in the secondeffect vapor body and so on for additional effects. Describes the operation of a tripleeffect evaporator to concentrate a solute liquid solution using significantly less energy than a singleeffect. Multiple effect evaporation remains one of the popular methods used for the concentration of aqueous solutions. Evaporation is the removal of solvent as vapor from a. Multiple effect evaporators mee dealing with the concentration of weak black liquor from pulp mill of paper industry consume a large amount of thermal energy in form of steam 2540%. Multiple effect evaporator is used for steam economy.
The heating steam loses its latent heat and condenses before it flows out of the tube bundle. During evaporation, a solution of cane juice is concentrated by the addition of heat. Water is removed from a solution by boiling the liquor in an evaporator and withdrawing the vapour. The feed is to be at 100f and is to be of such an amount as to contain 5 tons naoh per hour. A multipleeffect evaporator, as defined in chemical engineering, is an apparatus for efficiently using the heat from steam to evaporate water. Multiple effect evaporator the multipleeffect configuration combines two or more evaporator bodies to conserve steam, which is condensed in the firsteffect heat exchanger only.
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