Device for evacuating blow-back steam in pulp refining apparatus

Details Device for evacuating blow-back steam in pulp refining apparatus Device for evacuating blow-back steam in pulp refining apparatus

1977-12-27

1979-08-07

Fisher, Richard V.

Solid material comminution or disintegration

Apparatus

Cooperating comminuting surfaces

162 46, 162 47, 162261, 241244, B02C 700, B02C 2302, B02C 2326, D21B 112

Patent

active

041635256

ABSTRACT:
A device for evacuating blow-back steam in a pulp refining apparatus in which lignocellulosic pulp stock is ground in an environment of superatmospheric steam in a grinding space defined between 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 separated 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.

REFERENCES:
patent: 3921918 (1975-11-01), Peterson
patent: 4037792 (1977-07-01), Peterson
patent: 4059237 (1977-11-01), Mannstrom

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