Principle of Multiple Effect Evaporator:
- Utilizes the vapor produced from one effect (stage) to heat the next effect, thus reusing energy and improving overall efficiency.
Construction of Multiple Effect Evaporator:
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- Effects (Stages): Multiple evaporators connected in series.
- Heat Exchangers: In each effect where the liquid is heated.
- Condensers: To condense the vapor from each effect.
- Feed and Product Tanks: For the initial liquid and concentrated output.
Working:
- The feed liquid enters the first effect, where it is heated by steam and partially evaporated.
- The vapor from the first effect is used as the heating medium for the second effect.
- This process continues through multiple effects, with each subsequent effect operating at a lower pressure and temperature.
- The final product is a concentrated liquid, and the vapor is condensed.
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Uses:
- Concentrating solutions in the sugar, desalination, pulp and paper, and chemical industries.
Merits:
- High energy efficiency due to vapor reuse.
- Lower operating costs compared to single-effect evaporators.
- Effective for large-scale continuous operations.
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Demerits:
- Complex design and operation.
- High initial investment.
- Maintenance can be challenging due to multiple stages.
Thank you for reading from Firsthope's notes, don't forget to check YouTube videos!
