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.
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How does a multiple-effect evaporator work?
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.
How does a mee plant work?
A solution containing a desired product is feed into the evaporator and it is heated by a heat source like steam. Because of the applied heat, the water in the solution is converted into vapour and is condensed while the concentrated solution is either removed or feed into a second evaporator for further concentration.
Which multi effect evaporator arrangement?
Multiple-effect evaporators in the sugar industry operate in the forward-feed arrangement, in which steam and sugar juice flow in the same direction.
How does a multi effect still work?
It consists of multiple stages or “effects”. In each stage the feed water is heated by steam in tubes, usually by spraying saline water onto them. Some of the water evaporates, and this steam flows into the tubes of the next stage (effect), heating and evaporating more water.
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.
How many evaporators are attached in multiple effect evaporator?
Advantages of Multiple Effect Evaporator About 5 evaporators can be attached.
What is single effect evaporator?
A conventional evaporator is heated by steam which condenses and transmits heat energy to the solution to be evaporated. As this solution boils it in turn releases vapor which may: – Either be condensed in a condenser, in which case the process is known as “single effect” evaporation.
What is MEE salt?
It Is used to evaporate the residue water from MEE concentrated liquid and generate dry salt for dispose. MEE concentrated liquid have large amount of water content which is not possible to dispose so salt dryer is used after MEE to reduce water content from MEE concentrated liquid.
How many stages are practically possible in a multi effect evaporator?
While in theory, evaporators may be built with an arbitrarily large number of stages, evaporators with more than four stages are rarely practical except in systems where the liquor is the desired product such as in chemical recovery systems where up to seven effects are used.
What is thermal desalination process?
Thermal desalination is a process that involves changing saline water into vapor. This vapor, or steam, is generally free of the salt, minerals, and other contaminants that were in the saline water. When condensed, this vapor forms a high-purity distilled water.
How many evaporators are attached in multiple-effect evaporator?