Method and plant for producing high-yield pulp from pulp chip material containing lignocellulose
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United States of America Patent
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-
Nov 17, 1992
Issued Date -
N/A
app pub date -
Oct 29, 1991
filing date -
Nov 4, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method of producing high-yield pulp from pulp chip material containing lignocellulose the material is treated with steam in a steam treating station (1) for driving air out of the material and heating the latter. Heat treated material is mixed in a mixing station (8) with a liquid containing chemicals. The mixture of steam treated material and said liquid is transferred from the mixing station to an impregnation station (25) for impregnating the material by means of said chemicals. Impregnated material is supplied to a refining station (36) for refining the material. According to the invention the steam treated material is mixed with said liquid in proportions, such that the created mixture of material and liquid leaving the mixing station (8) assumes a flowing pumpable consistency. Further, said flowing mixture is pumped from the mixing station (8) to the impregnation station (25).
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