Pulp and paper drying apparatus and method

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

1976-07-26

1978-04-04

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34119, 34124, 165 90, 165133, F28F 1318

Patent

active

040819132

ABSTRACT:
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 exchange relationship with the drums. Pressurized steam is directed into the interior of each of the drums, with a syphon 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 surface 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 .times. 60.

REFERENCES:
patent: 3242583 (1966-03-01), Calkins
patent: 3466189 (1969-09-01), Erb
patent: 3633662 (1972-01-01), Voll
patent: 3943638 (1976-03-01), Robson
"Engineering", Aug. 17, 1951, pp. 221-222, Heat Transfer During Condensation of Steam by H. Hampson.

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