Device for evacuating blow back steam in pulp refining...

Details Device for evacuating blow back steam in pulp refining... Device for evacuating blow back steam in pulp refining...

D - Textiles, Paper

21

D

92/41

D21D 1/00 (2006.01) D21B 1/12 (2006.01) D21D 1/30 (2006.01)

Patent

CA 1068960

DEVICE FOR EVACUATING BLOW BACK STEAM IN PULP REFINING APPARATUS ABSTRACT OF THE DISCLOSURE A device for evacuating blow-back steam in a pulp refining apparatus in which lignocellulosic pulp stock is ground in an en- vironment of superatmospheric steam in a grinding space defined be- tween a pair of grinding members which rotate relatively to one another in a closed housing having a feed-in opening into which the pulp stock is advanced by means of a feed screw which rotates within a feed-in passage. A jacket having a perforate wall is arranged about the feed-in passage for receiving the blow-back steam separ- ated from the pulp stock, and which steam is evacuated therefrom through a conduit connected to the jacket. The feed screw rotates in close proximity to the perforate wall to maintain it free of pulp stock particles.

294145

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