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| Example Flow
Schemes |
| Zero
Discharge System For Effluents |
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Effluent feed is concentrated
in a multiple effect evaporator
system using vapor recompression
to minimize steam consumption.
The effluent feed is passed
through a Rising Film Evaporator
(RFE) and Forced Circulation
Evaporators (FCE) in series
to concentrate it to a desired
level. This concentrated mass
is then passed to a “sludge
dryer” to convert effluent
sludge to powder.
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Up gradation of Wax |
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The melting point and hardness
of wax is increased by passing
the soft wax feed through a
Falling Film Evaporator (FFE),
an Agitated Thin Film Evaporator
(ATFE) and two Short Path Distillation
Units (SPDU). The mixed volatiles
and soft wax are stripped off
in stages.
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DMSO recovery |
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DMSO
is recovered from water and
salts by pre-concentrating it
in a Rising Film Evaporator
(RFE), then removing the salts
in an Agitated Thin Film Dryer
(ATFD) and finally separating
it from water by distillation. |
|
Pyridine Recovery |
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Water and pyridine, which form
an azeotrope are separated by
passing the mixture into a Distillation
Column, followed by a Liquid-liquid
Extractor (LLE) and another
Column which gives almost 99.5%
pure pyridine at the bottom
and an azeotropic mixture of
pyridine-water at the top which
is recycled back to the LLE.
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