F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
103/119
F04D 1/10 (2006.01) B01F 7/06 (2006.01) F04D 7/04 (2006.01) F04D 13/12 (2006.01)
Patent
CA 1333457
A pumping system is capable of handling a paper pulp suspension of medium consistency (e.g. about 8-15% solids consistency) utilizing a conventional centrifugal pump. A conventional pump system capable of handling 3-8% consistency pulp may be retrofit to handle 8-15% consistency pulp. A tube with vanes, and having an open end, extends through the inlet to the pump so that there is a small clearance between the vanes and the inlet, and so that the open end is adjacent but spaced from the hub of the pump impeller. A gas passage extends from the hollow interior of the tube to an area remote from the pump. The tube is rotated in a direction of rotation opposite to the direction of rotation of the pump impeller, and at a speed sufficient to fluidize pulp of about 8-15% consistency, and to force the pulp toward the pump. Gas which collects at the pump impeller is withdrawn through the tube, and a gas passage in a shaft connected to the tube, and for that purpose a vacuum pump may be utilized.
613870
Richter Johan C.f.c.
Richter Ole J.
Fetherstonhaugh & Co.
Kvaerner Pulping Aktiebolag
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