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What is the economy of multiple-effect evaporator?

What is the economy of multiple-effect evaporator?

In multiple effect evaporators, steam economy has to be paid for by increased capital costs of the evaporators….The economy of multiple effect evaporators.

Number of effects Steam consumption (kg steam/kg water evaporated) Total running cost (relative to a single-effect evaporator)
One 1.1 1
Two 0.57 0.52
Three 0.40 0.37

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.

Which product obtained from multiple-effect evaporator is?

salt production …evaporated salt is produced by multiple-effect vacuum evaporators, and an important quantity is made in so-called open crystallizers or grainers that produce a type of crystal preferred for use in some of the food industries.

What is the disadvantage of a multiple-effect evaporator?

Disadvantages are: 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.

How do you calculate multi effect evaporator?

5.2.3 Calculations for multiple- effect evaporators Usually, the areas of each effect are assumed equal. The calculations are done using material balances, heat balances, and the capacity equations q = UA∆T for each effect.

How many types of mee plants are there?

Multi Effect Evaporator [MEE] Types of industrial evaporators: Falling Film Evaporator. Forced Circulation Evaporator. Rising Film Evaporator.

What is the capacity of multiple effect evaporator?

Ketav Multiple Effect Evaporator, Capacity: 550 Kld

Capacity 550 KLD
Brand Ketav
Voltage 220 V, 380 V
Max Temperature 120 C
Pressure 0.098 Mpa

Why multiple effect evaporator is preferred over single effect?

The latent heat of the vapor leaving in single effect evaporator is not used but is discarded. Much of this latent heat, however, can be recovered and reused by employing a multiple – effect evaporator, that is, vapor from one effect serves as the heating medium for the next.

How can you increase the efficiency of a multiple effect evaporator?

Diagnosis involves leakage detection in MEE by vacuum testing and hydro testing followed by high pressure cleaning along with chemical cleaning to remove the scaling in the evaporator which will improve the efficiency of the MEE.

What is the benefit of multiple effect evaporator?

Major Advantages of RDG Multi-effect systems: Reduced energy required to run full system. Reduced condensing load with additional effects (less cooling water needed) Liquor flow control. Convenient foul condensate collection and processing.

What is the economy of an evaporator?

Economy (or steam economy) is the number kilogram of water vaporized from all the effects per kilogram of steam used. For single effect evaporator, the steam economy is about 0.8 (<1). The capacity is about n-times that of a single effect evaporator and the economy are about 0.8n for n-effect evaporators.

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