D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
92/52
D21D 5/20 (2006.01) B07B 1/20 (2006.01) D21D 1/02 (2006.01) D21D 5/02 (2006.01)
Patent
CA 1271073
ABSTRACT The invention refers to a device for screening of fiber suspensions, especially within the medium consistency range 6-15 % dry substance. The device comprises a housing (1) with connection for inject (2) at one end, a reject outlet (3) at a distance therefrom, and outlet (4, 5) for accept therebetween, a rotor (24) with ribs (25), which during the rotation of the rotor moves along a screen surface (6), as well as a grinding device (28, 29) for the reject before it leaves the screening device through a pumping and dilution zone. The invention constitutes a simplifi- cation of screening and reject treatment of fiber pulps by making it possible in one and the same device to screen in two or more stages as well as to grind the reject fraction in order to obtain a shives reduction. The screen can be used during screening of chemical, semichemical, chemimechanical and mechanical pulps.
511726
Fetherstonhaugh & Co.
Kvaerner Pulping Aktiebolag
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