Method and system for stabilizing dry-based density of wood...

Details Method and system for stabilizing dry-based density of wood... Method and system for stabilizing dry-based density of wood...

D - Textiles, Paper

21

C

D21C 1/00 (2006.01) B27L 11/00 (2006.01) G01N 21/55 (2006.01)

Patent

CA 2714235

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.

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