Pulp and paper drying apparatus and method

Details Pulp and paper drying apparatus and method Pulp and paper drying apparatus and method

D - Textiles, Paper

21

F

34/26

D21F 5/04 (2006.01) D21F 5/10 (2006.01) F28D 11/02 (2006.01)

Patent

CA 1079958

PULP AND PAPER DRYING APPARATUS AND METHOD Abstract of the Disclosure A wood pulp and paper drying machine comprising a plurality of drying drums around which a sheet of pulp or paper material travels in a circuitous path in heat ex- change relationship with the drums. Pressurized steam is directed into the interior of each of the drums, with a sy- phon removing condensate from the interior of each drum. To reduce the effect of the water condensate in the drum inhibiting heat transfer through the cylindrical wall of the drum to the pulp or paper material, the interior sur- face of each drum is made as a polished metal surface (such as stainless steel) having a roughness index no greater than about 125 and desirably in the order of 4 - 32 on General Electric Surface Roughness Scale Cat. No. 342 x 60. - 1 -

277689

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