Nnmultiple effect evaporator pdf merger

A multipleeffect evaporator, as defined in chemical engineering, is an apparatus for efficiently using the heat from steam to evaporate water. Multiple effect evaporation remains one of the popular methods used for the concentration of aqueous solutions. Consider two evaporators connected so that the vapour line from one is connected to the steam chest of the other as shown in fig. Multiple effect evaporator is used for steam economy.

Model and optimisation of a multieffect evaporator of sugarcane. A sugar evaporator is a heat exchanger tubular calandria. 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%. Example 55 a tripleeffect forcedcirculation evaporator is to concentrate a 10 per cent solution of sodium hyroxide to 50 per cent. During evaporation, a solution of cane juice is concentrated by the addition of heat. The heating steam loses its latent heat and condenses before it flows out of the tube bundle.

In the evaporator, the seawater fed in is heated to its boiling temperature and is partly evaporated by boiling. In a singleeffect evaporator, steam provides energy for. Evaporation is the removal of solvent as vapor from a. Pdf single and multiple effect evaporators pranavv.

Describes the operation of a tripleeffect evaporator to concentrate a solute liquid solution using significantly less energy than a singleeffect. The multipleeffect configuration combines two or more evaporator bodies to conserve steam, which is condensed in the firsteffect heat exchanger only. Pdf holistic optimisation of solarassisted multiple. 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. Noniterative design of multiple effect evaporators using excel addins. Heating is performed by passing steam inside the tube bundle. In a multipleeffect evaporator, vapor from one body heats a second body at a lower boiling temperature. In case of a singleeffect evaporator, the vapor from the boiling liquor is condensed and the concentrated. Milk condensing in vacuum pan uses high amount of steam to evaporate water. Dynamic simulation of multiple effect evaporators in paper. Noniterative design of multiple effect evaporators using.