Patent · US Active

Method and arrangement for adding treatment liquors to cellulose material in a down flow vessel

US8852395B2 · kind B2 · utility

0Cited by

0References

8Claims

0Family size

Assignee

VALMET AB · SE

Inventors

Daniel Trolin · Karlstad, SE
Fredrik Wilgotson · Sundsvall, SE

Key dates

Filing date	Mar 25, 2011
Grant date	Oct 7, 2014
Priority date	—
Expiry date	Mar 25, 2031

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21C7/14
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The method and arrangement are for adding treatment liquid to comminuted cellulose material, preferably wood chips, during the manufacture of chemical pulp in a continuous process. The process is using a down-flow vessel wherein chips are descending down the vessel in a plug flow and wherein treated chips are continuously fed out at the bottom of the vessel. By arranging at least one telescopic pipe inside the vessel that extends down into the plug flow makes it possible to adjust the position for the addition of treatment liquid depending on current operational parameters.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.