Two stage medium consistency pulp pumping

Details Two stage medium consistency pulp pumping Two stage medium consistency pulp pumping

F - Mech Eng,Light,Heat,Weapons

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F04D 1/10 (2006.01) F04D 7/04 (2006.01) F04D 29/22 (2006.01) F04D 29/44 (2006.01)

Patent

CA 1244284

19 TWO STAGE MEDIUM CONSISTENCY PULP PUMPING ABSTRACT OF THE DISCLOSURE A centrifugal pump for pumping suspensions having a consistency of about 6-20% (for example, for pumping paper pulp) has a second stage for increasing head. An auxiliary impeller is connected to the drive shaft in front of the main impeller, and upon rotation of the drive shaft directs the suspension being pumped axially into association with the main impeller. Mounted between the pump inlet and the auxiliary impeller are a plurality of stationary guide vanes, and mounted on the opposite side of the guide vanes from the auxiliary impeller are a plurality of pre- fluidizing vanes which are also connected to the drive shaft. The stationary guide vanes remove extreme pre- rotation of the suspension ahead of the auxiliary impeller, and change the turbulent and chaotic condition of the suspension into a directional flow at a definite angle of entrance. Utilizing the pump of the invention, there is no need to provide a vacuum system in order for the pump to operate properly.

503310

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