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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8052843 B1

PDFFull Text
Expired
Date of Patent:
Nov. 08, 2011

Filed:

Nov. 30, 2006

System and a method for the steam pre-treatment of chips in association with the production of chemical cellulose pulp

Applicants:

Vidar Snekkenes, Oslo, NO;

Linda Almqvist, Sundsvall, SE;

Daniel Trolin, Karlstad, SE;

Lennart Gustavsson, Karlstad, SE;

Inventors:

Vidar Snekkenes, Oslo, NO;

Linda Almqvist, Sundsvall, SE;

Daniel Trolin, Karlstad, SE;

Lennart Gustavsson, Karlstad, SE;

Assignee:

Metso Paper Sweden AB, Karlstad, SE;

Attorneys:

Rolf Fasth

Fasth Law Offices

Primary Examiner:

Matthew Daniels

Assistant Examiner:

Anthony Calandra

Int. Cl.
CPC ...
D21C 7/00 (2006.01); D21C 1/02 (2006.01);
U.S. Cl.
CPC ...
Abstract

The vessel in which the chips are pre-treated with steam (ST) is provided with a ventilation channel at the top of the vessel for the leading away of weak gases to a weak gas system (NCG). A simple safety system has been installed with the aim of guaranteeing that these weak gases do not reach a level of concentration at which these weak gases become explosive. The safety system has a control unit (CPU) that detects a process parameter that is indicative of the fraction of moisture in the weak gases and opens dilution lines that supply air for the dilution of the weak gases in the ventilation channel. It is appropriate that the dilution take place in stages, where the dilution lines are opened in stages with successively increasing temperature of the weak gases.

Find Patent Forward Citations

Snekkenes, Vidar. (2011). System and a method for the steam pre-treatment of chips in association with the production of chemical cellulose pulp (U.S. Patent No. 8052843). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8052843

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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