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M/s. Everest Blower Systems did a typical study on De-odourisation of Edible oil in a company which is into Refining of Edible.
The company manufactures and export of all kinds of edible oils, cotton seed, maize oil, soyabin oil, groundnut oil, cotton seeds etc.
Particularly we did study on two plants:-
(a.) 200 ton per day capacity plant for Cotton seed oil .
(b.) 400 ton per day capacity plant for Palm Oil.
In existing plant they made vacuum from 2-stages Booster and 2-stages steam jet ejector combination.
Principle of process: Removal of Free Fatty Acid from oil under Vacuum by sparging steam into the oil. (Deodorization of Cotton seed oil & Palm oil).
Nature of process: Continuous process cycle.
Case Studies: Study of Cotton Seed Oil Deodorization.
Process: Refining & Deodorization of Crude Cotton Seed Oil.
Nature of Process: Continuous type.
Existing Vacuum System: 2-stage Booster & 2- stage Steam jet ejector.
Existing Vacuum Recorded: 60 torr (on Dial gauge)
Steam Pressure in Boiler: 8.5 Kg/cm2 (Working Pressure: 10.5 kg/cm2)
Raw material: Crude Cotton Seed Oil.
Percentages of FFA in Crude Cotton Oil: 0.1 -0.2
Percentages of FFA in Refined Oil: 0.04
In Cotton Seed Oil Refining they are using manually Hand Firing Boiler.
Raw fuel: Coal
Boiler Make: Vashpa.
Capacity of Boiler: 3 ton.
Working Pressure: 10.5 Kg/cm2.
Coal Consumption: 11.5 ton per day.
I.D Fan Rating: 30 H.P
Water Feeding Pump into boiler motor Rating: 20 H.P.
Steam generation time: 4 hrs.
Pressure Variation: 8.5 Kg/cm2 – 10.5 Kg/cm2
Problem: Vacuum level is not achieved properly.
In Palm Oil Refining they are using Fluidized Bed Combustion Boiler
Raw Fuel: Meshed Coal or Powdered Coal.
Boiler Make: Thermax
Capacity: 6 ton
Working Pressure: 10.5 Kg/cm2
F.D fan motor Rating: 12.5 H.P
In Cotton Seed Oil Refining
Primary Barometric Condenser:
Water flow rate: 125 m3/hr
Secondary Barometric Condenser:
Water flow rate: 4 m3/hr
In Palm Oil Refining
Primary Barometric Condenser:
Water flow rate: 172 m3/hr
Secondary Barometric Condenser:
Water flow rate: 6 m3/hr.
Circulation Pump details:
Flow rate: 143 m3/hr.
Head: 40 mtr.
Power: 14.8 kw
R.p.m=2900 r.p.m
Make: Johonson Pump India Ltd.
∆T=5 0c.
Win=280c Wout=330c
Capacity of Cooling Tower:236 TR.
Calculation:
Conversion Factors:
1 Kg/cm2 = 14.19 Psig.
1 lb/hr = 0.45 Kg/hr.
| Placement & Number of orifices | Diameter of Orifices (mm) | Steam Pressure (Psig.) | Steam Flow Rate (Kg/hr) |
| Deo. Column(5 no.s) | 2.5 | 7 | 13.6 |
| Deaerator top | 2.8 | 7 | 2.7 |
| Deaerator bottom | 2.8 | 7 | 11.36 |
| Packed bottom | 2.8 | 7 | 3.6 |
Total Steam Consumption by Graphical Method: 35 Kg/hr (approx.)
Total Non-Condensable Load: 8 Kg/hr.
Free Fatty Acid Load: 10 Kg/hr.
Deodorizer: 35.32 m3 …..……..………………… Height: 7.2 mtr.Diameter: 2.5 mtr.
Packed Column: 2.08 m3 ………………………..Height: 1.7 mtr. Diameter: 1.43 mtr.
Stripping Column: 6.4 m3 …………………………Height: 7 mtr. Diameter: 1.08 mtr.
Deaerator: 7.6 m3 …………………………………Height: 4.6 mtr. Diameter: 1.25 mtr.
Duct Length: 9.65 m3 ………………………………Height: 38 mtr. Diameter: 0.6 mtr.
Fatty Scrubber: 5.2 m3………………………………Height: 3 mtr. Diameter: 1.5 mtr.
Total System Volume = 65 m3 (approx.)
