Solid material comminution or disintegration – Apparatus – Including means applying fluid to material
Reexamination Certificate
1999-03-26
2001-02-13
Husar, John M. (Department: 3725)
Solid material comminution or disintegration
Apparatus
Including means applying fluid to material
C241S046170, C241S185600
Reexamination Certificate
active
06186426
ABSTRACT:
SUMMARY OF THE INVENTION
The invention relates to a comminution and distribution device for comminutable, pumpable materials, in particular mechanically dewatered slurry. Mechanically dewatered slurry contains foreign objects, like metal particles, small stones, hair and plastic parts, which place special demands on comminution and distribution devices. Digested slurry also contains foreign objects like these, including hair.
Such comminution and distribution devices are known from publications WO 86/07049 and DE 2356039. In the instruction contained in WO 86/07049, a slurry dewatered to a pasty consistency is pressed through a perforated matrix by means of a screw conveyor. This gives rise to sausage-shaped particles that are fed to a belt dryer. DE 2356039 discloses a slurry distribution and metering device for incinerators with grate firing, in which a slurry pre-dewatered to a water content of 75-85% first exits the distribution and metering device, and then is cut up into small pieces by a cutting device equipped with knife blades, beater blades and cutting wires.
Both devices exhibit serious disadvantages. When conveying the slurry through a perforated matrix as instructed in WO 86/07049, the danger is that individual holes will become clogged by foreign objects contained in the slurry, e.g., hair, plastic parts or wood chips. This would also occur if foreign objects removed from the slurry by pressing it through a sieve were larger than the diameter of the holes in the perforated matrix. In particular, hair ends are frequently pushed through two different holes in the perforated matrix. This narrows the cross section, and subsequently clogs the holes, so that such perforated matrixes must be cleaned frequently. To prevent such clogging, WO 86/07049 provides a compression unit in the form of a flap, whose surface equals half the area of the perforated matrix, and which can swivel around an axis that centrally halves the matrix area. While this kind of flap does ensure that not all holes in the matrix halves covered by the flap become clogged, it cannot guarantee that all holes will remain open. With respect to the cutting device described in the instruction of DE 2356039, the danger is that the knife blades, beater blades and cutting wires will encounter hard pieces of rock or metal in the slurry, causing damage or rapid wearing to the cutting device.
Therefore, the object of the invention is to provide a comminution and distribution device for comminutable, pumpable materials, in particular mechanically dewatered slurry, with which roughly the same sized pieces can be fabricated and fed in controllable quantities to a downstream device, e.g., a dryer, wherein the mentioned disadvantages of the known comminution and distribution devices are avoided.
The object of the invention is achieved via the structural features of the comminution and distribution device mentioned in the main claim.
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Husar John M.
Millen White Zelano & Branigan P.C.
SEP Gesellschaft fur Technische Studien
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