Title:
連続蒸煮方法及び装置
Document Type and Number:
Japanese Patent JP5049980
Kind Code:
B2
Abstract:
The continuous digester system has an inlet defined therein for the feed of a chips suspension and an outlet for the output of a cooked suspension of pulp. The suspension of chips is fed in to the inlet through a line at the beginning of the cook, where the chips suspension has a volume of starting cooking fluid that establishes a fluid/wood ratio that is greater than 3.5. A final cooking fluid is present during the cook for the major part of the cock and is withdrawn through a withdrawal strainer only during the final 15 minutes of the cook. The final cooking fluid ensures a fluid/wood ratio that is greater than 3.5 in association with the withdrawal. The withdrawn final cooking fluid during the final 15 minutes of the cook consists of spent black liquor that maintains a residual alkali level that lies under 15 g/l.
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Inventors:
Vidal, Sneckness
Lindstrom, Michael
Lindstrom, Michael
Application Number:
JP2008542280A
Publication Date:
October 17, 2012
Filing Date:
November 24, 2006
Export Citation:
Assignee:
Metso Paper Sweden Activolag
International Classes:
D21C7/12; D21C3/24
Domestic Patent References:
| JP2005220510A | ||||
| JP2005133219A | ||||
| JP2004300603A | ||||
| JP2002523640A | ||||
| JP2004522873A | ||||
| JP2005515311A |
Foreign References:
| US5885414 |
Attorney, Agent or Firm:
Takao Hamano
Teruichi Hirai
Teruichi Hirai