Classifying – separating – and assorting solids – Sifting – Feeding and discharging
Patent
1989-07-10
1991-05-28
Huppert, Michael S.
Classifying, separating, and assorting solids
Sifting
Feeding and discharging
209250, 209254, 209291, 209297, 209380, 209407, B07B 124, B07B 155
Patent
active
050192485
DESCRIPTION:
BRIEF SUMMARY
This invention relates to apparatus for the separation of dry material into distinct phases, and more particularly for the separation of fibrous bark from core material of chopped or crushed stalks of a crop such as Kenaf.
BACKGROUND ART
In the case of the kenaf plant it is composed of stalk having a fibrous bark and core, of which the former possesses long fibres capable of producing a high quality paper pulp, while the latter is of lesser quality short fibre composition. In some areas of the world the process of recovering the bark fibre comprises cutting and bundling of the stalks, which are dried in the field and then retted with the bark fibre being scutched from the central woody stem. This is a time-consuming task and the bark fibre that is obtained is not in best form for paper pulping.
Proposals have been made for machine processing of the harvested stalks and this has entailed firstly crushing, grinding or chopping of the stalks, and subsequently separation of the bulk material into separate phases. A similar form of crushing mill to that utilised in the sugar cane industry has, in one instance, been utilised, although modified, for the first stage of processing, while in another instance a forage harvester has been used to gather the crop for baling in a finely chopped condition. It has not been possible to achieve high quality grading with conventional separation apparatus.
DISCLOSURE OF THE INVENTION
It is the main object of the invention to provide apparatus for grading fibrous material which is efficient and achieves a high degree of separation of the phases of the material.
In accordance with the invention there is provided apparatus for grading fibrous material comprising a hollow body for rotation on an inclined axis and having a perforated wall and upper inlet and lower outlet ends, an end plate at the inlet end of the body having an opening for the introduction of fibrous material for grading, a plurality of annular partitions within the body and spaced along its axis to define axially aligned compartments within the body, and a plurality of longitudinally extending, circumferentially spaced baffles within each of said compartments and extending between adjacent ones of said partitions, whereby with rotation of said body while downwardly inclined form said inlet to said outlet ends a fibrous phase of the material is conveyed by the baffles through a central opening in each of said annular partitions and via each of said compartments in turn to discharge from the outlet end, while a more solid phase is discharged through said perforated wall of the body.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described in more detail with reference to the accompanying drawings, in which:
FIG. 1 is a side elevation, partly in broken section, of separation apparatus according to this invention;
FIG. 2 is a diagrammatic representation in perspective of the internal construction of the apparatus;
FIG. 3 is a diagrammatic representation in end elevation thereof;
FIG. 4 is a diagrammatic transverse section on the line IV--IV of FIG. 5; and,
FIG. 5 is a side elevation of an installation showing bulk input being applied to the separation apparatus from a bale breaking machine.
A preferred embodiment is shown in the drawings, and with reference to FIGS. 1 to 3 it will be seen that the separation apparatus of this invention consists of a hollow, cylindrical, perforated body 10 rotatable upon a series of support wheels 11 which wheel 11A is supplied with driving power via the shaft 12 in order to effect rotation of the body 10. Additional wheels 11 may also be supplied with driving power. The support wheels 11 are fixed upon an upper beam 13 carried by a frame 14 in such a way that the beam 13 is downwardly inclined from an input end 15 of the apparatus. Almost the entire body 10 is enclsed by a housing 16 preferably provided with a removable top cover 17. The main body of the housing 16 is divided into three separate longitudinally arranged sections 16A, 16B and 16C with the floor 18 of e
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Ankal Pty Limited
Huppert Michael S.
Wacyra Edward M.
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