Method of and apparatus for disposing of wastes from wastepaper recycling
AssigneeOschatz GmbH
InventorsNorbert Srowig, Gerhard Golkowski, Wilhelm Lutterbach
Life of this patent
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Abstract
To dispose of a dewatered collected product consisting predominantly of cellulosic materials in a solids phase and a residue consisting predominantly of plastics in wastepaper recycling, the collected product is dried to at most 25% weight percent moisture content as based upon the solids and is then layered onto an oscillating grate. The residue is applied as a second layer on the first layer and the resulting two-layer bed is burned on the grate with bottom-blowing with slag formation and collection. The heat content of the combustion gas can in part be recovered by the generation of steam.
Claims23
A method of disposing of wastes from wastepaper recycling in the paper and cardboard industry, comprising the steps of:
- (a) separately recovering from a wastepaper recycling process a wet dewatered collected product of solids consisting predominantly of cellulosic material and a residue consisting predominantly of plastic pieces separated from waste paper prior to recycling treatment;
- (b) drying said collected product to a residual water content of at most 25% by weight of the collected product;
- (c) continuously layering the collected product dried in step (b) to form a continuously advancing layer thereof;
- (d) depositing upon said layer of the collected product dried in step (b), a layer of said residue to form a continuously advancing two-layer bed;
- and
- (e) burning said continuously advancing two-layer bed while subjecting same to bottom blowing with an air-containing gas to substantially destroy said collected product and said residue while recovering a slag from the resulting combustion and producing a combustion gas.
An apparatus for disposing of wastes from wastepaper recycling in the paper and cardboard industry, comprising:
- means for separately recovering from a wastepaper recycling process a wet dewatered collected product of solids consisting predominantly of cellulosic material and a residue consisting predominantly of plastic pieces separated from waste paper prior to recycling treatment;
- means for drying said collected product to a residual water content of at most 25% by weight of the collected product;
- means for continuously layering the dried collected product to form a continuously advancing layer thereof;
- means for depositing upon said layer of the collected product, a layer of said residue to form a continuously advancing two-layer bed;
- and
- means for burning said continuously advancing two-layer bed while subjecting same to bottom blowing with an air-containing gas to substantially destroy said collected product and said residue while recovering a slag from the resulting combustion and producing a combustion gas.
Dependencies are inferred from the claim text.