Pulp screening device
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsHiromi Fukudome, Koukichi Maedera
Life of this patent
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Abstract
The present invention is a pulp screening device which is capable of screening a large quantity of pulp with low power, by preventing clogging of a screen cylinder. The device is provided with one or a plurality of vanes which revolve within an agitation chamber formed between a pair of inner and outer screen cylinders, holding a predetermined small space from each of the inner and outer screen cylinders. The agitation chamber is practically partitioned in the circumferential direction by the vanes.
Claims12
A pulp screening device, comprising:
- a pair of inner and outer screen cylinders;
- and
- one or a plurality of vanes which revolve within an agitation chamber formed between said inner and outer screen cylinders, holding a predetermined small space from each of said inner and outer screen cylinders.
A pulp screening device, comprising:
- a screen cylinder;
- and
- one or a plurality of vanes which revolve within an agitation chamber formed outside or inside said screen cylinder, holding a predetermined small space from said screen cylinder;
- wherein a revolution-direction front portion of said vane has a wall face extending radially toward the peripheral surface of said screen cylinder, and said vane is formed so that the spacing between said vane and said screen cylinder widens gradually from said wall face toward a revolution-direction rear end.
A pulp screening device, comprising:
- a screen cylinder having a plurality of filter holes;
- and
- one or a plurality of vanes which revolve within an agitation chamber formed outside or inside said screen cylinder, holding a predetermined small space from said screen cylinder;
- wherein a plurality of conical hollow are provided in the peripheral surface of said screen cylinder which faces said agitation chamber, and said filter hole is formed to be offset from the center of said conical hollow in the direction opposite to the direction in which said vane revolves.
Dependencies are inferred from the claim text.