Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Mechanical defibration in the presence of heated gas or gas...
Patent
1987-07-06
1991-09-10
Alvo, Steve
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Mechanical defibration in the presence of heated gas or gas...
162 28, 241 28, D21C 112
Patent
active
050471180
ABSTRACT:
The energy consumption of a cellulosic fibrous material refiner is significantly reduced, while the capacity is maintained by reducing grinding frequency while increasing the retention time and power amplitude (edge bar load). The grinding frequency is maintained between about 200-2,000 Hz, preferably between about 300-900 Hz. The retention time is more than a second, being increased at least about 100 times compared to conventional disk refiners. The power amplitude is at least doubled. Retention time is increased by greatly increasing the retention volume by removing the majority (at least about 90% of the steam at approximately the area that it is generated, minimizing the number of cutting elements, and disposing the grinding surfaces of the refiner so that they define a volume of revolution (e.g. a frusto-conical or cylindrical volume).
REFERENCES:
patent: 2980350 (1961-04-01), Lejuene
patent: 3305183 (1967-02-01), Monden
patent: 3815834 (1974-06-01), Gilbert
patent: 4401280 (1983-08-01), Reinhall
patent: 4600475 (1986-07-01), Reinhall et al.
Rydholm, "Pulping Processes", Inerscience Publishing, N.Y., Sep. 1967, p. 326-331.
Salmen, N. L. and Fellers, C., "The Fundamentals of Energy Consumption During Viscoelastic and Plastic Deformation of Wood", Trans. Tech. Sec. (Can. Pulp Pap. Ass.) 9 (4):TR 93 (1982).
Salmen et al., "Fatigue of Wood-Characterization of Mechanical Defibration", J. Pulp Pa. Sci. 11 (3):J 68 (1985).
Atack, D., "Fundamental Differences in Energy Requirement . . . ", Sven Papperstidn. 84 (14):22 (1981).
Pearson, A. J., "Towards a Unified Theory of Mechanical Pulping . . . ", Paper presented at 1983 Mechanical Pulping Conf., Wash., D.C., Jun. 14-14, 1983.
Salmen, "Chip Refining: Influence of Mechanical and Chemical Treatments on the Energy Consumption . . . ", STFI-meddelande serie A Nr 964; Stockholm, 12/86.
Alvo Steve
Kamyr AB
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