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The Armfield FT68 Deodorising Unit is a floor-standing batch processing vessel, suitable for steam stripping of fatty acids from edible oils. For use in teaching/training and research and development.
The deodorising process vessel has a batch size of 25 litres and is mounted in a floor-standing stainless steel framework, which also houses the high-vacuum equipment, control console, discharge pump and polishing filter.
A 3.0kW electrical heating element is incorporated in the vessel to heat the oil to temperatures of up to 250°C. The vessel also contains a special steam distribution tube which enables the thorough steam/oil mixing required.
Operating temperature is selected on an electronic temperature controller and is recorded on a continuous chart recorder both of which are housed in the control console.
An immersed cooling water coil provides a means of reducing the oil temperature on completion of the process.
A multi-stage vacuum system incorporates a steam ejector, condenser and liquid-ring vacuum pump to achieve vacuum levels less than 5mm Hg (ABS), 6.5 mbar in the process vessel. Accurate indication of the vessel pressure is achieved using an electronic pressure transmitter, which indicates the vacuum level down to 1 Torr on a digital display in the control panel.
Fatty acids and other compounds carried over with the steam are condensed in a spray-type condenser and they pass to drain with the sealing water of the liquid-ring vacuum pump.
On completion of the deodorising process, the oil is pumped out of the vessel through a 'polishing' filter, which removes any remaining particles in the finished oil.
The deodoriser vessel is designed in accordance with the BS 5500 code for pressure vessels.
All materials in contact with process fluid are of stainless steel.