DISTILLATION
Short Description:There are seven distillation column in this industry for separating the alcohol.These are1.Analyser column 2.Aldehyde column 3.Pre ectifying !olumn"P!# $.Purifying !olumn"P!# %.ectifying !olumn"!# &.'mpure Separation !olumn"'SP# (.Simmering !olumn Among these ( columns analyser)aldehyde)P! and P! are *ept at pressure less than atmospheric.! is *ept at high pressure mainly in +et,een 2.1 and 2.2 atm and 'SP and simmering are *ept at atmospheric pressure.
Purpose of distillation in ' : to separate ena "e/tra neutral alcohol# and rs "rectified spirit# from fermented mash.
eed: The fermented mash ,hich is produced +y fermentation process . eed temp : (2.(0 degree ! eed rate : 22 lph "litre per hour#
Process lo, Diagram:
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'ndividual Distillation !olumn Analysis :
1.AA4S5 : eed : fermented mesh. Temperature : 6pper section temp:&7.% degree ! y
2
o,er section temp:8%.& degree !.
Pressure :2.18 *g9cm2
P;!5SS D5S!'PT'; : 1. ermented mash coming at a temp. 3% degree ! is heated upto (2.( degree ! in a phe"plate heat e/changer#. 2. The heated mash is fed to the analser column. 3. rom this column the overhead product is fed to the aldehyde column for removal of aldehyde. $. ottom product is sent to decanter for further processing %. rom middle section the li
Process Diagram:
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2.AD5>4D5 !;6? : eed: overhead product of analyser. Temperature: 6pper section:%3.$ degree ! o,er section:&.1 degree !.
Pressure: 3.11% *g9cm2.
P;!5SS D5S!'PT'; : 1. Analyser overhead product is fed to the column. 2. rom overhead product "aldehyde vapour# a certain portion is reflu/ed to this column and the other part ,hich contains 7%= aldehyde is ta*en out as product. 3. ottom product containing mi/er of alcohols is send to P!.
Process
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diagram:
3.P5 5!T''!AT'; !;6?:
eed: the com+ined mi/ture of alcohol from analyser and aldehyde column.
Temp: 6pper section:$7.% degree ! o,er section:(7.% degree !
Pressure:.2&1 *g9cm2
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P;!5SS D5S!'PT';: 1. ;verhead product of this column that is li;"higher fusel oil# is removed and
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sent to the 'SP.ma/imum fraction of fusel oil from the alcohol is removed in this section. 3. The +ottom product is passed through the flash tan* ,here steam is generated.This steam is used to increase the temperature of analyser column. •
P;!5SS D'A@A?:
$.P6''!AT'; !;6?:
eed:the overhead product"higher concentrated alcohol mi/ture# of P!.
Temp: 6pper section:&% degree ! o,er section:&8.3 degree !
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P;!5SS D5S!'PT';:
1. 'n this column hydrostatic distillation is carried out. 2. A mi/er of high +oiling point *no,s as technical cutB is ta*en out as overhead product. 3. ottom product having lo, +oiling point is sent to the !. $. rom middle section ester is removed from alcohol ,hich is the main purpose of this column. %. >igher concentration of ester in alcohol ma*es it s,eet so its removal is necessary. •
P;!5SS D'A@A?:
%.5!T'4'@ !;6?: eed: +ottom product of P!. Temperature:
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6pper section:78.& degree ! o,er section:1%.3 degree !
Pressure:2.7% *g9cm2
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P;!5SS D5S!'PT';: 1. ;verhead product is sent to the re+oiler ,here it is heated up and this heated steam is passed through flash tan* ,here sufficient amount of steam is generated.this steam is used as heating source of analyser column. 2. A portion of the +ottom product is recycled to P! "lees# and the other portion is drained ,ith level maintanace. 3. rom middle section 5A ) ; and >; is ta*en out.5A is sent to the simmering column ,here as ; and >; is sent to the 'SP column. $. 5A ta*en out from this column has lo,er ethyle alcohol percentage so further processing is needed.
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P;!5SS D'A@A?:
&.'mpure Separation !olumn :
eed: technical cut) ester) and all the >; and ; that
is removed from other columns. Temperature :
6pper section :(8.( o! o,er section :1(.( o!
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P;!5SS D5S!'PT'; :
1. ectified spirit "S# is o+tained as overhead product. 2. rom middle of the column product is sent to the decanter ,here fusel oil is completely separated.and another portion of mi/er from decanter is recycled +ac* to the column. 3. ottom product is drained out through scru++er so that the trace amount of alcohol can +e removed. •
P;!5SS D'A@A?:
(.S'??5'@ !;6?:
eed:ena from !. Temperature: 6pper section:(7.1 o ! o,er section:8%.2 o !.
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P;!5SS D5S!'PT';: 1. ?ethanol) diacetyle) and propanol is ta*en out as overhead product. 2. 5A "7%= ethyle alcohol concentration# is o+tained as +ottom product ,hich is the main yield of the distillation. 3. This column is the only column ,hich can separate the impurities as mentioned a+ove.
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P;!5SS D'A@A?:
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Production ate :
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5A rate : & PD "litres per day# S : & PD. T;TA rate :&& PD.
