Fiberboards 



2825 



INFEED. 

 (] 



BURNER 



GAS 



OIL 



HEAT EXCHANGER 





%: 



AIR GATE 



2Z 



AN 



YCLONE 



AIR GATE-.^ _^ 



OUTFEED 



a) 



PRESSURIZED 



"DOUBLE DISC. REFINER 



'FIBER MADE FROM ANY 



TYPE RESIDUE - 



(SAWDUST, ShIAVINGS, CHIPS S BARK) 



OUTFEED 



Figure 23-55. — Tube dryers. (Top) Single-stage. (Bottom) Double-stage. (Drawing after 

 Buikatl971.) 



