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US 4,440,635 AGranted
Process and apparatus for the recovery of cellulose fibers from paper-plastic mixtures
AssigneesHaigh M. Reiniger, Toste W. Moller
InventorHaigh M. Reiniger
Life of this patent
Estimating the term…
Abstract
A process, and apparatus for recovering cellulose fibers from contaminated paper-plastic mixtures by exposing the mix to controlled wetting to increase the weight of paper cellulose components relative to the weight of the plastic components; subjecting the wetted mixture to abrasive forces to fiberize the paper component and then separating the fiberized paper cellulose product from the plastics and other contaminants, to yield several classified products showing distinctly improved quality.
Claims34
A process for reclaiming low density moisture absorbent materials from a material mixture, comprising:
- inputting a material mixture containing high and low density moisture inabsorbent and low density moisture absorbent materials
- selectively and controllably applying moisturizers to said material mixture and increasing the moisture content of said material mixture to a predetermied value to moisturize said low density absorbent materials and increase the weight and density thereof to form high density moisturized materials and a moisture weighted material mixture;
- establishing a centrifugal field and segregating said moisture weighted material mixture in said field to produce a high density fraction and a low density fraction;
- partially fiberizing said high density moisturized materials to selectively reduce the size thereof;
- separating said segregated high density fraction into an oversize and an undersized fraction;
- and collecting the undersized fraction as recovered product and discharging the oversized fraction as an unreclaimed product.
3 more elements
A process for the recovery of cellulose fibers from LW-MSW comprising:
- (a) cutting the LW-MSW to a size between 2" and 6" ;
- (b) segregating the LW-MSW in a centrifugal field into a high density fraction and a low density fraction;
- (c) removing the heavy undersized contaminants including grit, glass and vegetable matter from the cut, segregated LW-MSW;
- (d) controlling the moisture content of the decontaminated LW-MSW to a predetermined level;
- (e) partially fiberizing the paper fraction of the moisture controlled LW-MSW to selectively reduce the size of the paper;
- (f) segregating the LW-MSW in a centrifugal field into a high density fraction and a low density fraction;
- (g) separating said centrifugally segregated high density fraction into an oversized and undersized fraction;
- and collecting the undersized fraction as recovered product;
- (h) selectively removing the low density fraction from said centrifugal field by inducing a controlled air stream within said centrifugal field.
6 more elements
An apparatus for separating cellulose fiber from a chopped paper-plastic mixture comprising:
- (a) means to control the moisture content of the paper-plastic mixture;
- (b) means to partially fiberize the paper fraction of the mositure controlled paper plastic mixture;
- (c) means to induce a centrifical field to separate the paper-plastic mixture into a high density region and a low density region;
- (d) screen means surrounding the centrifical field means adapted to segregated the undersized fraction of the high density fraction from the oversized fraction;
- (e) means to collect the segregated undersized fraction.
2 more elements
An apparatus for separating cellulose fiber from a chopped paper-plastic mixture comprising:
- (a) means to control the moisture content of the paper-plastic mixture;
- (b) a rotor chamber is communication with said moisture control means to partially fiberize the paper component of the paper-plastic mixture and to induce a centrifical field to separate the paper-plastic mixture into a high density fraction and a low density fraction;
- (c) a classifier screen surrounding the rotor chamber and adapted for the passage of the partially fiberized paper fraction of the paper mixture;
- (d) means to collect the partially fiberized paper passing through the classifier screen;
- (e) a blower at the bottom of said rotor chamber to create a low pressure area within said centrifical field to induce a downward force on the low density fraction in the rotor chamber;
- (f) venturi means incommunication with said blower to intensify the downward force induced by the blower;
- (g) means to collect the paper-plastic mixture from the bottom of the rotor chamber.
4 more elements
A process for treating and separating a mixture of municipal solid waste comprising:
- feeding said mixture to a first reduction means for chopping and screening substantially all the heavy materials and metals from the mixture to leave a residual mixture comprising high and low density inabsorbent materials and low density absorbent materials;
- feeding said residual mixture to a first rotor chamber and subjecting said mixture to ballistic attrition for removing residual gross contaminants;
- feeding said decontaminated residual mixture to a moisture control section for selectively and controllably increasing the moisture content of said decontaminated residual mixture to a predetermined value for increasing the weight and mositure content of said low density absorbent materials for forming a moisturized weighted mixture;
- feeding said moisturized weighted mixture into a second centrifugal field for fiberizing and segregating said weighted and moisturized absorbent materials of said moisturized weighted mixture;
- subjecting at least part of said centrifugally segregated and fiberized weighted and moisturized absorbent materials to an abrasion means for additionally fiberizing said materials;
- propelling said abraded centrifugally segregated and fiberized weighted and moisturized absorbent materials against a classifier means for discharging therethrough undersized centrifugally segregated and fiberized weighted and moisturized materials.
3 more elements
An apparatus for reclaiming fibrous materials from a mixture of materials containing high and low density inabsorbent materials and low density absorbent materials comprising:
- means for receiving said mixture for selectively and controllably increasing the moisture content of said mixture to a predetermined value by moisturizing said mixture and increasing the weight of said low density moisture absorbent materials for forming a moisture weighted mixture containing high density moisture absorbent materials;
- means for inducing a centrifugal field in said moisture weighted material mixture for at least partially fiberizing said high density moisture absorbent materials and segregating said material into high and low density fractions;
- means for selectively passing an undersized portion of said high density moisture absorbent materials to output.
Dependencies are inferred from the claim text.