Table of Contents
What does the multiple-effect evaporator do?
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 mee ETP?
MEE is widely used for product concentration and has now been used for recovery of water from wastewater which can be reused for industrial operations thus reducing overall fresh water demand of the industry leading zero liquid discharge and sustainable development.
Which is better single effect evaporator or multiple-effect evaporator?
It is more economical to use a multiple effect evaporator than a single effect evaporator because the vapors generated in one effect will feed vapors in another effect, and so on. Evaporative capacity and steam consumption decrease as the efficiency of the process increases.
Who invented evaporators?
Norbert Rillieux
Norbert Rillieux (March 17, 1806 – October 8, 1894) was an Louisiana Creole inventor who was widely considered one of the earliest chemical engineers and noted for his pioneering invention of the multiple-effect evaporator.
What is MEE and atfd?
SALT DRYER & ATFD UNIT 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.
What is multiple 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.
Who invented the multiple effect evaporator?
Norbert Rillieux (1806-1894), widely considered to be one of the earliest chemical engineers, revolutionized sugar processing with the invention of the multiple effect evaporator under vacuum.
Which feed is used in multiple effect evaporator?
The multiple-effect evaporator used for the conventional sugar juice evaporation process is the forward-feed multiple-effect evaporator, in which steam and sugar juice flow in the same direction.
What is ATFD system?
ATFD is an ideal apparatus for continuous processing of concentrated material into dry solids. The device consists of a cylindrical and vertical body covered with a heating jacket. Equipped inside is a row of pendulum blades that spread the wet feed product in the form of a thin film.
How does a calandria work?
The calandria vessel is surrounded by a separate water system that provides radiation shielding located in the shield tank. This water provides a means of cooling the wall of the calandria vessel by nucleate pool boiling heat transfer, thereby halting the progression of core degradation and damage [69].
Why was Rillieux invention important?
Norbert Rillieux (1806-1894) revolutionized sugar processing with the invention of the Multiple Effect Evaporator under Vacuum. Rillieux’s great scientific achievement was his recognition that at reduced pressure the repeated use of latent heat would result in the production of better quality sugar at lower cost.
What is multiple effect evaporator (Mee)?
The Multiple Effect Evaporator (MEE) is an apparatus for efficiently using the heat from steam to evaporate water. In a multiple-effect evaporator, water is boiled in a sequence of vessels, each held at a lower pressure than the last.
The multiple-effect evaporator was invented by an African-American inventor and engineer Norbert Rillieux. Although he may have designed the apparatus during the 1820s and constructed a prototype in 1834, he did not build the first industrially practical evaporator until 1845.
What are the advantages of multi-effect evaporators?
14. Applications of Multi-Effect Evaporators: Advantages: ‒ Product Concentration . ‒ Solvent Volume Reduction is a solution. ‒ Water/Solvent Recovery. ‒ Crystallization ‒ Advanced System. ‒ Easy Operation and Maintenance.
Can an evaporator have more than 4 stages?
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.