Apparatus for feeding lignocellulose-containing material through a steam screen into a refiner
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United States of America Patent
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-
Sep 4, 1990
Grant Date -
N/A
app pub date -
Nov 19, 1984
filing date -
Apr 12, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a refiner (40) with two opposed discs (47,48) rotatable relative to each other fibre pulp is manufactured from lignocellulose-containing material. The material is advanced in a channel comprising a plug pipe (20), through which the material is fed in compressed state, and a steam screen pipe (32) for discharging steam. The steam screen pipe (32) is located directly after the plug pipe (20) and has a cross-sectional area, which slightly exceeds that of the plug pipe in order to allow a limited expansion of the material plug. The steam is thereby allowed to flow through the material, at the same time as the material plug prevents clogging of the apertures (37,39) of the steam screen pipe.
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