Commercial Floriculture

Evaporator

• The perfume laden solvent is led into the evaporator.
• The evaporator is a wide mouthed circular bowel made in stainless steel with a capacity to hold 25 litres of solvent.
• It has an air tight lid with a hole at the centre for the outlet of the solvent vapour.
• The evaporator is heated over a water bath at a constant temperature of 75⁰C.
• The water bath is heated electrically by 2000 watt heating elements and the temperature is kept 75⁰C by thermostatic control.
• Temperature control is essential as high temperature and prolonged heating at atmospheric pressure will spoil the quality and appearance of the concrete.
• The evaporator should never be directly heated. It should be heated either over a water bath or by steam circulation.
• As the temperature rises in the evaporator, the hexane evaporates and the vapour escapes through the hole in the lid which is led into the condenser through a stainless steel pipe.