D - Textiles – Paper – 21 – B
Patent
D - Textiles, Paper
21
B
92/34
D21B 1/12 (2006.01)
Patent
CA 1277530
ABSTRACT OF THE DISCLOSURE In the production of mechanical pulp, the pulp and process steam that are discharged from the refiner (defibrator) are passed through a series of pulp/steam separation devices (such as centrifugal separators, separator conveyors, and the like). The steam separated in the first separator is valuable process steam, which is passed to a reboiler to produce fresh steam. Turpentine, methanol, and like products may be reclaimed from the condensate of the reboiler. The steam separated in succeeding separator stages is used for other purposes suited to steam of the pressure and character produced in the successive separation stages. For instance the steam separated by the second separator is passed to a pre-steaming device for steaming of the chips (or like comminuted cellulosic fibrous material) being fed to the refiner. A cyclotube is provided after the last steam separation stage, and produces moisture laden hot air, which is passed through a heat exchanger to produce hot process water. The cyclotube is directly connected up to a latency tank, or like pulp storage tank.
503217
Bereskin & Parr
Kvaerner Pulping Aktiebolag
Nilsson Bengt Henry
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