Buchi B-290 - Dehumidifier B-296

4 Description of function
24
B-290 Operation Manual, Version M
4.5 Dehumidifier B-296
Mini Spray Dryer B-290
Dehumidifier B-296
5
1
3
4
2
7
6
8
a Ambient air
b Condensation
c Cooling unit
d Condensed water
e Product
f Exhaust gas
g Compressed air as spray gas
h Feed
Fig. 4.4: Open loop Mini Spray Dryer B-290 with Dehumidifier B-296 for inlet air conditioning
Use as inlet air conditioning
The Dehumidifier B-296 is an accessory to enable a drying under constant and reproducible humidity
conditions cooling to a dew point of 3–5 °C.
The drying air is passing the refrigerator of the Dehumidifier B-296. The humidity in the ambient air
condenses in the refrigerator and is collected in a closed bottle.
The dry air is then heated up by the heater of the Mini Spray Dryer B-29.
Use in the closed mode
The Dehumidifier B-296 is an accessory to enable the safe use of a water-organic solvent mixture in a
closed loop with up to 50 % organic solvents content.
The inert gas is loaded with water-solvent mixture from the spray drying process in an external preheat
exchanger.
The solvent condenses in the Dehumidifier B-296 and is collected in a receiving vessel.