Arrangement and method for the continuous steam pre-treatment of chips during the production of cellulose pulp
US8986500B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2009 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Sep 26, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21C7/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The arrangement and method for the steam pre-treatment of chips during the production of cellulose pulp avoids the blow-through of gases in the steam pre-treatment vessel. This prevents foul-smelling gases from being released into the atmosphere. The inlet of the vessel has an inclined feeder device in a feeder-housing. In the event of the initiation of the risk for blow-through of steam, the feeder housing is sprayed with cooling liquid in order to increase condensation capacity of the chips being fed into the vessel. Ultimately the feeder housing is filled with liquid that establishes a liquid lock, and preferably at the same time as the feeder drive (M) is shut off. This avoids the emission of gases from the chip bin when interruptions in the process occur so that the release of odors into the surroundings is minimized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.