Methods for preparing pulpwood for digestion

Solid material comminution or disintegration – Processes – With classifying or separating of material

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Details

241 28, B02C 402, B02C 2308

Patent

active

055688969

ABSTRACT:
Methods for processing wood chips for digestion utilize a chip destructuring apparatus. The method includes an initial disc screen for removing the gross overthick and oversized chips which are discarded or are processed through a rechipper. After the initial disc screen, the entire stream of chips is processed to eliminate tramp metal. The entire chip stream is screened to remove fines. The stream of chips is fed to the chip destructuring apparatus from a surge bin with a star feeder. The star feeder is a metering device and is operated by a controller which monitors the level of chips in the surge bin. The controller uses the star feeder to feed a steady supply of chips to the chip destructuring apparatus which allows the destructuring apparatus to be configured for a maximum feed rate.

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"DynaYield Chip Conditioner Cost effective overthick chip processing" Rader Companies, Portland, Oregon-Brochure (no date).
"Rader Cyclo-Screen Rader Cyclone that screens out chip fines dust and dirt" Rader Companies, Portland, Oregon-Brochure (no date).
Henry, John T. "Conditioning of Over-Thick Chips: An Alternative to Chip Slicing" TAPPI 1993, pp. 805-832.
"Rader Companies Rader Disc Screen" Rader Companies, Portland, Oregon-Brochure (no date).
"Rader Air Density Separator. The most efficient and versatile protection device for chip slicers and pulp mill equipment" Rader Companies, Portland, Oregon-Brochure (no date).

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