Solid material comminution or disintegration – Processes – With application of fluid or lubricant material
Reexamination Certificate
2007-07-10
2007-07-10
Francis, Faye (Department: 3725)
Solid material comminution or disintegration
Processes
With application of fluid or lubricant material
C241S028000, C241S034000
Reexamination Certificate
active
11133306
ABSTRACT:
A method is proposed for improving pulp quality at high production rates on conical disc refiners. It permits a reduction in refining intensity by enabling fibre residence time to increase by increasing consistency, while avoiding the problem of plate plugging normally associated with high discharge consistency. In practice, inlet consistency is increased by the in-feed dilution, flat zone dilution or both, but without allowing the discharge consistency to rise. Instead, the discharge consistency is controlled at a fixed optimum value by the addition of dilution water within the conical zone. The result is that residence time is increased, and refining intensity decreased, by raising the consistency in the inner region of the refining zone, while avoiding the plate plugging caused by excessive consistency in the outer region of the refining zone.
REFERENCES:
patent: 3802964 (1974-04-01), Forgacs et al.
patent: 4148439 (1979-04-01), Floden
patent: 4342618 (1982-08-01), Karnis et al.
patent: 4963229 (1990-10-01), Lisnyansky et al.
patent: 6024308 (2000-02-01), Bartels et al.
patent: 6336602 (2002-01-01), Miles
patent: 6567766 (2003-05-01), Johansson et al.
patent: 6587803 (2003-07-01), Johansson
patent: 6752165 (2004-06-01), Johansson
patent: 6778936 (2004-08-01), Johansson
patent: 6938843 (2005-09-01), Johansson
patent: 1267016 (1990-03-01), None
James Owen et al, “A Practical Approach to Operator Acceptance of Advanced Control With Dual Functionality”, Control Systems '98, Sep. 1-3, 1998, Porvoo, Finland, pp. 184 to 194.
K.D. Murton et al, “Production Rate Effect on TMP Pulp Quality and Energy Consumption”, Journal of Pulp and Paper Science: vol. 23, No. 8, Aug. 1997, pp. J411 to J416.
B.C. Strand et al, “The Effect of Production Rate on Specific Energy Consumption in High Consistency Chip Refining”.
K.B. Miles et al, “The Flow of Pulp in Chip Refiners”, Journal of Pulp and Paper Science: vol. 16, No. 2, Mar. 1990, pp. J63 to J72.
K.B. Miles, “A Simplified Method for Calculating the Residence Time and Refining Intensity in a Chip Refiner”, Paper and Timber 73 (1991):9, pp. 852 to 857.
K. Miles, “Refining Intensity and Pulp Quality in High-Consistency Refining”, Paper and Timber 72 (1990):5, pp. 508 to 514.
K.B Miles et al, “Predicting the Performance of a Chip Refiner; a Constitutive Approach”, Journal of Pulp and Paper Science: vol. 19, No. 6, Nov. 1993, pp. J268 to J274.
K.B. Miles et al, “Wood Characteristics and Energy Consumption in Refiner Pulps”, Journal of Pulp and Paper Science: vol. 21, No. 11, Nov. 1995, pp. J383 to J389.
Ettaleb Lahoucine
Miles Keith
Roche Alain André
FPInnovations
Francis Faye
Ogilvy Renault LLP
LandOfFree
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