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Cotton Seed Oil Refining Plant Process
Cotton Seed Oil Refinery consists of the following process steps:
Cotton Seed Oil Refining Plant Process:
Degumming
The crude oil is pumped to the Neutralizer from the storage tank. In Neutralizer the oil is heated up to 60-70 degree C by means of the live and indirect steam provided in to the Neutralizer. The required quantity of Phosphoric acid is slowly added and allow this to react for 30 mins and after that raise, the temperature to 70 degrees centigrade, the required amount of caustic is added to neutralize the free fatty acid. Allow this to react for 10 mins and give a hot water wash, to allow the soap stock to settle. After 4-6 hours, soap stock is drained off. After removing soap stock give a hot water wash to remove the traces of Soap.
Neutralization
In continuous process the hydrated water degummed, Gums are
separated in the self-cleaning centrifugal separator.
This degummed oil is further heated by a steam in heat exchanger, then mixed properly with hot water with the help of knife mixer and getting water washed by a centrifugal separator. Finally, this water
washed oil is dried under vacuum in a vacuum drier.
Bleaching
In the bleaching process, the degummed oil is mixed with the bleaching earth in the bleacher. After proper holding & mixing this oil is sent to Pressure Leaf Filter followed by polishing filters. Then it is cooled by shell and tube cooler.
Deodorization
Deodorizing is nothing but The Distillation process. In which fatty acid is distilled from oil. Under high temperature condition and in presence of high vacuum, with the help of sparging & agitation steam. Further this fatty acid in vapors form, is condensed & recovered in liquid form by the vapors scrubbing system.
Deodorizer is multi-compartment vertical vessel, where each tray are specially designed which Ensures uniform distillation of odoriferous substances. Oil is overflows from tray to tray. Specially designed trays provide sufficient mass transfer surface for effective removal of volatile matters. Flow control system at the outlet of the deodorizer, ensures the maintenance of required level at the bottom tray. The steam used for stripping off volatile matters in the oil is distributed evenly and intensively, the steam meets the deodorized oil. Stripped off the volatile matter and rises through the vacuum. Stripping the volatile matter from the oil. The counter- current flow of steam and oil like this in specially designed trays lower steam consumption, than the conventional deodorizers. The deodorized oil leaving regenerative heat exchanger and finally cooled by
water in heat exchanger finally this oil is passed through the alternatively operating set of polishing filters.
Vapour Scrubbing
The volatile matters consisting of free fatty acid and other odoriferous substances stripped from the deodorizer are led to the vapour scrubber located at the outside of the deodorizing column. In the scrubber, volatile material rises through the bed of pall rings and meets liquid fatty acid sprayed from the top. Vapours are condensed, cooled, and then recalculated to condensed fresh vapours. Excess distillate collected is led to the storage tank, whenever high level reached in storage space below the
scrubber. Fatty acid scrubber is specially designed for minimum carryover of fatty materials, to the vacuum system.
