Deodorization is the ﬁnal stage of the reﬁning process, which is a steam distillation at elevated temperature under vacuum pressure to remove FFA, volatile compounds like oxidative compounds (aldehydes and ketones) and other contaminants based on their vapor pressure and volatility.
The current deodorization stage has three main concerns which are stripping of volatile components such as FFA and secondary oxidation products, removal of off-flavour, and thermal destruction of pigments. CONTINUOUS DEODORIZATION improves the flavour and oxidative stability of the refined oil by nearly a complete removal of FFA and other volatile odour and flavour compounds by thermal destruction of hydroperoxides. The peroxide value of oil is brought down to the minimum value possible in this process.
Ferro provides SS-316 and SS-304 ( as per customer requirement) vertical pressure vessel named FX-Deodorizer which is used to carry out the Deodorizing Process. It has 5-6 compartments/stages from top to bottom having various process friendly mechanisms within the compartments helping the efﬁcient deodorization of bleached oil. With any heat introduced here, permanent damage is being done, which means the free fatty acids along with aldehydes, ketones, etc. in the oil are already quickly stripped off. The bottom compartment of deodorizer works as economiser in which the discharging oil is cooled by the incoming oil. Then this oil is passed through Polish ﬁlter and series of cooling heat exchangers to bring oil to atmospheric temperature.
In Ferro’s Deodorising section, the main equipments are Fx-Deodorizer vessel, Deaerator vessel, Thermic ﬂuid heater system, Vacuum system, Steam PRS, Plate type heat exchangers, Polish ﬁlter, Cooling tower, etc along with various sub-parts like ﬂowmeters, pumps, control valves, etc.