D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
209/102
D21D 5/06 (2006.01) D21D 5/02 (2006.01)
Patent
CA 1330206
AN APPARATUS FOR SCREENING A SUSPENSION OF FIBROUS CELLULOSE PULP A B S T R A C T An apparatus for screening a suspension of fibrous cellulose pulp is described which comprises a housing and a rotor shaft, said housing having an inject section, first and second screening sec- tions, each of which comprising rotor members mounted on the rotor shaft and a cylindrical screening plate cooperating therewith and defining an outer accept chamber and an inner screening chamber, and a reject section for the removal of fiber suspension remaining at screening, said inject section communicating with the screening chamber of the first screening section. According to the invention the inject section is disposed between the first screening section and the second screening section, and the screening chamber of the first screening section communicates with the adjacent reject sec- tion. The housing includes an inlet section disposed at the end of the second screening section facing away from the inject section, so that an internal space of the inlet section communicates with the screening chamber of the second screening section, whereas the accept chamber of the first screening section communicates with the internal space of the inlet section via a communication extending outside the housing for transferring the fiber suspen- sion screened off in the first screening section to the second screening section. Further, the screening chamber of the second screening section communicates with the adjacent inject section for circulation of the remaining fiber suspension passing axially through the screening chamber, the accept chamber of the second screening section having an outlet for discharging fiber suspen- sion which has been screened off.
602484
Ekholm Rolf
Hillstrom Rune
Fetherstonhaugh & Co.
Kvaerner Pulping Aktiebolag
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