B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
182/46
B01D 33/00 (2006.01) B01D 33/21 (2006.01) B01D 33/46 (2006.01) B01D 33/74 (2006.01) B01D 33/76 (2006.01) B01D 33/82 (2006.01)
Patent
CA 1219530
Abstract A rotatable filter assembly comprises a rotor, in bearings in a container for fibre suspension. The centre of the rotor is formed by axial discharge tubes, into which hollow filter elements, forming annular filter discs open. A collecting hopper is provided extending into the centre of the filter assembly. The filter elements are provided to keep separately, at least dur- ing part of the rotation turn, a lower pressure inside than outside. Accor- ding to the invention the filter assembly is characterized in that each of the axial discharge tubes (6) is permanently connected to its own accumula- tor chamber (9) for filtrate, which is provided to keep during a first part (16) of the rotation turn of said drum (4) such a pressure, preferably atmospheric pressure that filtrate is brought to accumulate in the accumula- tor chamber (9), and that during a second part of the rotation turn of said drum (4) said accumulator chamber is provided to communicate with a device for filtrate discharge (11, 26) which is dimensioned to discharge the filt- rate from tube and accumulator chamber during this second part of the rota- tion turn.
443413
Borden Ladner Gervais Llp
Celleco Ab
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