» Products » Refining » Batch Refining
We use best technology for batch refining that primarily include pre treatment, bleaching, de-acidification & deodorization and cooling. The premium technologies used in batch refining are designed by skilled engineers and technocrats of our company. We offer all these at the market leading prices.
The feed oil is heated to 65-70°C in the Economiser by outgoing
deodorized oil followed by feed heater in batch refinery (during start up). Concentrated
phosphoric acid (0.05 - 0.10%) is injected by the Acid Metering Pump and
intensively mixed with the oil in the Acid Mixer before entering the
Conditioning Reactor. The oil is discharged into the slurry mixer above the
Bleacher. These process is done through batch refinery
The Pre-treated oil is pumped in to the Bleacher vessel which is kept under
vacuum, and heated up to Bleaching temperature under continuous mechanical
agitation. The calculated quantity of bleaching earth is charged to Bleacher
under oil level in order to avoid earth entry to the bleaching vacuum
system. The earth adsorbs any residual gums and soap as well as trace
metals, color bodies and other polar impurities. The Bleacher has mechanical
agitator operates under vacuum to ensure complete moisture and air removal.
The dried oil-earth mixture is discharged to the Filters with the help of
pump, where the spent earth is removed.
Filter Management: The bleaching system is based on the use of one filter
of sufficient filtration area. This filter can separate bleaching earth,
which is equivalent to two batches of bleacher. After completion of
filtration filter is being cleaned and prepared for the next cycle. The
cleaning procedure begins by first pressurizing the filter with steam to
expel residual oil into the Recovered Oil Tank and dry the spent filter
cake. The oil recovered from the filter cake is collected in the tank and
can usually be recycled to the Bleacher. After drying, the filter is opened
and the spent cake is dislodged and discharged via a hopper. The filter is
then closed and readied for the next batch.
De-Acidification / Deodorization
The Feed Pump pumps bleached oil to Deodorizer from the Intermediate
Bleached oil Tank through heat exchanger cooler if offered. The oil is
heated up to full processing temperature by thermal fluid or high pressure
steam in the Deodorizer vessel operated under full vacuum under continuous
sparging steam. As a result, free fatty acids (formed because hydrolysis) in
the oil and other remaining volatile impurities will be flashed off with the
steam as the oil temperature increases. The oil is maintained at this
temperature under full vacuum and sparge steam for 3-4 hours. The prolonged
thermal action breaks down carotene and other color bodies, resulting in a
lighter oil color. Also, the amount of remaining free fatty acids in the oil
is reduced to an absolute minimum. The stripping steam and resulting vapor
from the Deodorizer is routed through the catchall. Accumulated distillate
is discharged (drained) from the catchall at the interval of cycle.
The deodorized oil is dropped by gravity to heat exchanger-cum-cooler or
cooled inside the deodorizer .In the heat exchanger-cum-cooler if offered;
cooling of the oil is done by feed bleached oil circulated through coils
provided. Further this oil is cooled to the moderate filtration temperature
and pumped to storage tank through the polishing filters.