Method and system for stabilizing dry-based density of wood chips to be fed to a chip refining process
US8540845B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2011 |
| Grant date | Sep 24, 2013 |
| Priority date | — |
| Expiry date | Oct 7, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2021/845
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system for stabilizing dry-based density of wood chips from several sources feeding a chip processing stage upstream of a chip refining process, perform on-line estimation of a set of wood chip properties characterizing the wood chips, including light reflection-related property, moisture content and dry-based density, which are used by a reference model capable of comparing the estimated dry-based density with a predetermined target to produce error data, and selectively modifying discharge rate set points of one or more of the wood chip sources to minimize the error data within fluctuation limits around the target. The discharge rate of the wood chip sources is controlled in accordance with the set points to substantially stabilize the dry-based density of the wood chips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.