Paper making and fiber liberation – Apparatus – Automatic control
Patent
1998-02-17
1999-12-28
Drodge, Joseph W.
Paper making and fiber liberation
Apparatus
Automatic control
162272, 422185, 422242, D21D 500, D21C 1100
Patent
active
060076801
ABSTRACT:
Apparatus for safely carrying out pressurized peroxide bleaching of pulp in a bleaching vessel at a consistency exceeding 8%, the bleaching vessel designed for at least 0.5 MPa overpressure, with the pulp being pumped to the bleaching vessel through a mixer at a temperature exceeding 90.degree. C., wherein a bypass conduit is provided to bypass the mixer and wherein a valve is provided in the bleaching vessel, the valve opening when the pressure in the bleaching vessel or an affiliated part thereof reaches a first set point.
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Carlsson Torbjorn
Gustavsson Lennart
Drodge Joseph W.
Kvaerner Pulping AB
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