F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
103/17
F04D 1/10 (2006.01) B01F 7/08 (2006.01) F04D 7/04 (2006.01)
Patent
CA 1324033
ABSTRACT OF THE DISCLOSURE The invention relates to a method and an apparatus for treating high-consistency fiber suspension. The method and apparatus according to the invention are especially suitable for short distance conveyances of thick fiber suspensions having consistency of more than 15%, in pulp and paper industry, for example for discharge of mass towers either with a pump or without any actual pump. The treatment of fiber suspension having consistency of more than 15% is not possible with the known technique without a displacement type of pump, which is expensive and easy to break. Additionally, in discharging of the mass tower, drop leg, etc. fiber suspension causes trouble by arching. According to the invention, a feed apparatus (31) is arranged in the pulp chamber, which feeds fiber suspension to a fluidizing rotor (21), which fluidizes the fiber suspension, whereafter the suspension flows onwards. On the other hand, the feeder apparatus is characterized in that it is to raise the pressure of the fiber suspension sufficiently for the fluidization, but not too high, in which case the operational members would be stressed redundantly. For said reason fiber suspension is fed excessively to the rotor (21), whereby the feeding pressure of fiber suspension is controlled by throttling devices (34) which are arranged separate from the feeder apparatus in the back-circulation duct or passage.
570222
Gowling Lafleur Henderson Llp
Sulzer Pumps Ltd.
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