Apparatus for drying a fibrous web

Details Apparatus for drying a fibrous web Apparatus for drying a fibrous web

1980-03-14

1982-05-11

Gilreath, Stanley N.

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34155, 226 95, F26B 1102, B65H 1730

Patent

active

043286267

ABSTRACT:
A wet and air-permeable fibrous web, such as a cellulosic sheet coming from a paper mill, is dried by being led around a rotating drum with peripheral interstices centered on a perforated suction tube. The latter opens into a low-pressure chamber inside a stationary sectorial shield which has a wall, facing against the direction of drum rotation, provided with one or more apertures for the moisture-laden air to be exhausted. The peripheral interstices are formed by strips lying between a pair of axially spaced end rings, these strips intersecting a plane transverse to the axis of rotation along lines whose distance from that axis increases progressively in the direction of rotation whereby air drawn through the web by suction is also mechanically accelerated, against the centrifugal force, toward the center of the drum.

REFERENCES:
patent: 3118582 (1964-01-01), Rapoza
patent: 3142428 (1964-07-01), Faeber
patent: 3276140 (1966-10-01), Walser et al.
patent: 3587962 (1971-06-01), Herzhoff et al.
patent: 4251927 (1981-02-01), Luthi

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