Page 310 - Chemical Process Equipment - Selection and Design
P. 310
274 DRYERS AND COOLING TOWERS
Air diffuser Exhaust air
plates
Product
(a)
AIR
120
t
11
AIR 230 4 II I e- FEED
220 220
60
,Feed 180 180
4
210
2LO 2LO
2 70
303 300
+
PRODUCT PRODUCT
(d)
Figure 9.14. Spray dryer arrangements and behavior. (a) Spray dryer equipped with spray wheel; straight section L/D = 0.5-1.0 (Proctor and
Schwurfz Inc.). (b) Spray dryer equipped with spray nozzle; straight section LID = 4-5 (Nonhebel and Moss, 1971). (c) Spray dryer for very
heat sensitive products; flat bottom, side air ports and air sweeper to cool leaving particles. (d) Distribution of air temperatures in parallel
and countercurrent flows (Masters, 1976, p. 18, Fig. 1.5). (e) Droplet-forming action of a spray wheel (Stork-Bowen Engineering Co.).
