Solid material comminution or disintegration – Apparatus – Including means applying fluid to material
Patent
1984-04-11
1986-08-26
Rosenbaum, Mark
Solid material comminution or disintegration
Apparatus
Including means applying fluid to material
241 4617, 2412601, B02C 2336
Patent
active
046078029
ABSTRACT:
The invention relates to a primary pulper turbine for processing recycled paper, of the type having the general shape of an helix.
This turbine is formed of a shaft (2) carrying at least two helical disks (3, 4) coaxial to the shaft (2) and having a small pitch. These disks extend over at most 360.degree. and are spaced from each other along the shaft (2) by a distance of at least 1.5 times the helical pitch of a disk. The turbine carries on its base a set of radially extending fins (6, 7, 8), each one of which is curved into a spiral starting from the shaft (2).
Preferably, the slant of the helical disks (3, 4, 5) relative to a plane perpendicular to the shaft (2) is approximately 15.degree., and the disks are angularly spaced from each other by a same angle approximately equal to 360.degree. divided by the number of disks, for providing a proper dynamic balance of the turbine.
The turbine of the invention is designed so as to have a high separation power for fibers, and to separate contaminants, such as plastics, from the paper pulp, without breaking them up into small pieces. This design lends itself to the building of small efficient primary pulpers, the volume of which may be less than 5 m.sup.3, as well as of larger ones.
REFERENCES:
patent: 2626132 (1953-01-01), Reed
patent: 3323570 (1967-06-01), Tullock et al.
E et M Lamort
Eley Timothy V.
Rosenbaum Mark
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