Pulper device for the recovery of paper production waste, plant comprising said device and associated method for recovery of the waste

a technology of paper production waste and pulverizer, which is applied in the field of pulverizing device for the recovery of paper production waste, can solve the problems of serious danger, cutting of the web, and production waste around the machine, and achieves the effect of suitable recovery

Inactive Publication Date: 2004-05-20
FAPER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

0009] According to a first aspect, an object of the present invention is to provide a device which avoids the abovementioned drawbacks an...

Problems solved by technology

During the continuous production of the paper web, breakages of the web with consequent waste production may occur.
Moreover, the edges of the web are cut with the formation of trimmings since they have irregularities which would be unacceptable in the finished product.
At present, the waste which is produced underneath the ya...

Method used

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  • Pulper device for the recovery of paper production waste, plant comprising said device and associated method for recovery of the waste
  • Pulper device for the recovery of paper production waste, plant comprising said device and associated method for recovery of the waste
  • Pulper device for the recovery of paper production waste, plant comprising said device and associated method for recovery of the waste

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Embodiment Construction

[0034] FIG. 1 illustrates schematically the terminal part of the line for the production of a web or strip of paper, in particular tissue paper. 1 denotes the last wire or the last felt for conveying the partially dried layer of slurry formed in a manner known per se. The felt 1 is tangential to a yankee drier 3 so as to transfer the moist web from the external surface of the felt to the external cylindrical surface of the yankee drier 3 which is heated internally. The yankee drier 3 is embraced by the web over a wide contact arc, between the zone of tangential contact with the felt 1 and a doctor or separator blade 5. In a manner known per se the web V, which is dried owing to the heat exchange with the yankee drier 3, is separated from the cylinder and wound so as to form a reel B intended for further processing.

[0035] Below the yankee drier 3, and in particular in the zone where the doctor blade 5 is arranged, there is a device 7 for collection and recovery of the waste or scrap ...

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Abstract

The pulper device for waste paper material comprises: a container (9) for collecting said waste, having an inlet opening (11) for said waste, at least one pressurized water nozzle (13; 15) which produces a jet of water which intercepts the waste which falls into said container, and a first pump (27) which removes the water and waste from said container.

Description

DESCRIPTION[0001] 1. Technical field[0002] The present invention relates to a device for recovery of paper production waste in paper mills for the continuous production of paper webs, in particular but not exclusively of so-called "tissue" paper. More particularly, the invention relates to a pulper to be combined with a yankee drier in a continuous paper production machine, for the recovery and recycling of processing waste from the drier itself.[0003] The invention also relates to a method for recovery and recycling of the production waste.[0004] 2. State of the Art[0005] In the production of paper, and in particular in the production of tissue paper, typically used as toilet paper, multipurpose drying paper and for other uses, a slurry of cellulose fibers and water is distributed from a head box onto a forming wire or onto a felt for forming a web. By means of successive passes, during which the water content in the slurry is gradually reduced, the web is conveyed to a section of ...

Claims

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Application Information

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IPC IPC(8): D21B1/34D21F7/04
CPCD21F7/04D21B1/345
Inventor PERINI
Owner FAPER
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