Patent · US Active

Method for the continuous steam pre-treatment of chips during the production of cellulose pulp

US8088249B2 · kind B2 · utility

0Cited by

3References

7Claims

0Family size

Assignee

METSO PAPER SWEDEN AB · SE

Inventors

Kent Karlsson · Fellingsbro, SE
Daniel Trolin · Karlstad, SE

Key dates

Filing date	Nov 25, 2008
Grant date	Jan 3, 2012
Priority date	—
Expiry date	Mar 9, 2030

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21C1/02
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

The arrangement and method are for the steam pre-treatment of chips during the production of cellulose pulp to avoid the blow-through of gases in the steam pre-treatment vessel. This prevents foul-smelling gases from being released into the atmosphere. Spreader nozzles for the injection of cooling fluid are arranged in the gas phase of the steam pre-treatment vessel. In the event of the risk for blow-through of steam, cooling that is proportional to the risk is activated. It is possible to avoid the emission of gases from the chip bin when interruptions in the process occur, whereby the release of odors into the surroundings can be minimized.

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