Refiner steam separation system for reduction of dryer...

Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Mechanical defibration in the presence of heated gas or gas...

Reexamination Certificate

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Details

C162S021000, C162S028000, C162S234000, C241S049000

Reexamination Certificate

active

07905983

ABSTRACT:
A refiner steam separation system according to the present invention includes a blowline for transporting a mixture of fiber material from a refiner to an inlet of a steam separator. Waste steam is discharged from the separator through a waste steam outlet. Cleaned fiber material is discharged from the separator through an exit, which prevents a substantial portion of the waste steam from passing through the exit. A relay pipe communicates with the exit and a dryer duct, and transports cleaned fiber material therebetween. A resin input communicates with the relay pipe, and supplies resin therein. The resin is mixed with the cleaned fiber material prior to the cleaned fiber material being dried in the dryer duct. The present invention is also directed to a method of reducing VOC emissions generated during refining cellulosic fibrous material.

REFERENCES:
patent: 4298425 (1981-11-01), Ranzen et al.
patent: 5034175 (1991-07-01), Safstrom
patent: 6464826 (2002-10-01), Safstrom et al.
patent: 7718034 (2010-05-01), Vaders

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