Patent · US Active

Method and arrangement for impregnating chips

US7901541B2 · kind B2 · utility

1Cited by

4References

12Claims

0Family size

Assignee

Metso Fiber Karlstad AB · SE

Inventors

Vidar Snekkenes · Karlstad, SE
Lennart Gustavsson · Karlstad, SE
Daniel Trolin · Karlstad, SE
Mats Nasman · Karlstad, SE

Key dates

Filing date	Jul 14, 2005
Grant date	Mar 8, 2011
Priority date	—
Expiry date	Sep 29, 2027

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21C3/00
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The method is for the impregnation of chips during the manufacture of chemical pulp. The chips are continuously fed without preceding steam treatment to the top of an impregnation vessel that maintains atmospheric pressure. Impregnation fluid (BL) is added to the impregnation vessel and establishes a fluid level (LIQ_LEV). The chips that have been added establish a chips level (CH_LEV) that lies at least 3-5 meters over the fluid level. The temperature at the top of the vessel essentially corresponds to ambient temperature.Impregnation fluid BL is fed in to the impregnation vessel in such an amount and at such a temperature that the temperature that is established at the fluid level (LIQ_LEV) is established within the interval 90-115° C., preferably within the interval 95-105° C.

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