﻿KILN DRYING HANDBOOK. 



51 



since the air leaving the sprays and passing through the baffles is at 

 its dew point, a recording thermometer is usally placed in the baffles. 

 This thermometer shows the dew point rather than the wet-bulb 

 temperature, and for convenient use in water-spray kilns, the drying 

 schedules should be modified to show the dew-point temperature as 

 well as the wet-bulb temperature. 



CAA/VAS CUffTA/N 



CAA/VAS CUffTAIN' 



^^&^^^^ ^m^M^^2^^sm%gm 





jm 



A 



vmr 



ran 



2m: 



■b6WI H 



ymrj 



jggl 



h&ll II 



T5W 



y m ~ 



jm: 



y 



JSffl- 



£Mi 



A 



ME 





E2C 



II :•:". 



^ 



f\ 



^ 



A 



^111, l_L_LJ_ 



fffTt/ffAf Dl/cr 



X! 



ym\ti&t$&\ 



ii ii ns§ 



*§||g 





H^ 



IJ3I 



i i i i Ea , 



it ii ik*i 



PUC 



as 



ii ii*^ . 



n^~ 



ig%%r 



^JT 



H Ihftfrl 



JEgS; 



W3 





j F^'l , 



HI 



E^^a^a^a: 



/ML£T DUCT * 



/7FSS/Z A//? /A/TXtf? 

 Pie. 9. — Cross section of blower compartment kiln. 



BLOWER KILNS. 



_ Fans or blowers are used in several types of kilns for forcing the 

 circulation. Blower kilns for drying lumber are, almost without ex- 

 ception, of the recirculating compartment type, and those in commer- 

 cial use are mostly of the external-blower type. Figure 9 is a dia- 

 grammatical cross section of a blower kiln and illustrates the path of 



