Two Column Differential Pressure Ethanol Production Line Fuel
Process description of two-column differential pressure
The differential pressure of the process unit is: the differential
pressure between rectifying column T502 and beer stripping column
(mash column) T501.
1,The fermentation mash from fermentation section is preheated to
70 ℃ through primary preheater E502 (Fermentation mash is preheated
by crude alcohol vapor that is condensed at the top of the mash
column), secondary preheater E507 (Fermentation mash is double
preheated by waste distillers in mash column), and feed into the
mash column at the 24th tray. Fermentation mash is heated by the
bottom steam when downward in the mash column T501, alcohol vapor
is upward and separated from the waste mash. Waste mash is
discharged at the bottom of the column, and the alcohol content of
waste mash is no more than 0.05% and transported to the
environmental protection section. Upward crude alcohol is for
defoaming (low concentration alcohol) by 25th, 26th defoaming
plates and enters into 1 # preheater, part of the alcohol vapor is
condensed, uncooled alcohol vapor continues to be condensed by a
set of condenser. The condensate liquid is heated indirectly by
steam condensate water and residual distilling water (waste water
at the bottom of the column) of rectifying column and enters into
the rectifying column. Part of the crude alcohol refluxes (the
purpose is for defoaming the crude alcohol gas), while some
non-condensing gas is discharged into the atmosphere through the
Heating mode of mash column: the alcohol vapor at the top of the
rectifying column heats the mash column through the reboiler E501,
The reboiler uses a circulating pump for circulation. The mash
column works under the negative pressure, the negative pressure is
produced by the connection of the vacuum pump through the condenser
2,Light alcohol from mash column T501 is indirectly heated by the
steam condensate water, residual distilling water of rectifying
column, enters into the rectifying column at the 18th tray. While
the light alcohol is gradually concentrated, head impurities such
as methanol and aldehyde are upward with alcohol vapor to the top
of the column, part of impurities (such as oil) is retained on the
upper layers of the feed plate whereby as fusel oil produced into
the fusel oil separator for oil and alcohol separation. Fusel oil
enters into fusel oil storage tank V509, and light alcohol enters
into light alcohol tank and is pumped to the fermentation mash
tank. The head impurities can be removed by extracted part of the
reflux as industrial alcohol. The alcohol with a concentration of
95-96% (v/v) in the 6-8 trays below the reflux mouth of the column
top is extracted as the finished product, and after cooling, the
high concentration alcohol enters into the finished product alcohol
Heating mode of rectifying column is heated indirectly by fresh
steam through the rectifying column reboiler, and the condensate
water is flash steamed and sent to the crude alcohol preheater by
the condensate pump for exchanging heat with the crude alcohol and
then return to the boiler room for reuse. The flash steam is used
as part of the heat source of the beer stripping column.
Q: Are you trading company or manufacturer?
A: We are factory.
Q: How long is your delivery time?
A: It will take about 25 working days, exact time is according to
the time agreed by both parties.
Q: What is your nearest port?
A: Shanghai Port,China.