What is multi effect?
Definition of multiple-effect : relating to or consisting of a series of evaporators in which the pressure decreases progressively from one to the next so that the vapor from each unit except the last heats the liquid in the next unit.
What are the multiple-effect of chemical?
In the multiple-effect system, developed for the American sugar industry in 1843, steam is used to heat the first of a series of evaporators. The juice is boiled and drawn to the next evaporator, which is heated by vapour from the first evaporator.
What is Med process?
MED process is designed to produce distilled water with steam or waste heat from power production or chemical processes, and/or to produce potable water.
What are the advantages of multistage flash distillation?
Advantages of a multi-stage flash distillation system include: 1) a low operating cost when waste heat is used for the distillation process; 2) the quality of the feedwater is not as important when compared with the reverse osmosis system technology; and, 3) the multi-stage flash system has a high gain output ratio ( …
What are the disadvantages of multiple-effect evaporator?
- high head-room requirements.
- higher pressure drop through the tubes than in a falling film evaporator.
- hydrostatic head at the bottom of the tubes may increase product temperature and cause temperature-sensitivity problems.
What is multiple effect evaporators how it works?
A multiple-effect evaporator uses the water vapor from one effect as the heating medium for the next effect, which operates at a lower boiling point. The latent heat in water vapor can also be reused by thermally or mechanically compressing the vapor to a higher pressure and temperature.
What is meant by multiple effect evaporation?
A multiple effect evaporator is an apparatus that efficiently uses the heat from steam to evaporate water. • In a multiple effect evaporator, water is boiled in a sequence of vessels, each of which is at a lower pressure than the last.
What is vapor compression distillation?
In terms of distillation, Vapor Compression, or VC, refers to Mechanical Vapor Compression (MVC) technology, which is utilized to impart energy (in the form of heat) to evaporated water (i.e. vapor) through centrifugal compression. The result is vastly improved efficiency over other distillation methods.