Waste paper recycling device

Abstract

A papermaking unit (13) comprises: a papermaking wire mesh unit for forming a wet paper web (12) from pulp suspension (8); and a headbox unit for supplying the pulp suspension to the papermaking wire mesh unit. A control unit (700) comprises a papermaking initial-period control functional unit for controlling the papermaking unit (13) during a papermaking initial period. The papermaking initial-period control functional unit controls the thickness of a leading edge region of the wet paper web formed during the papermaking initial period to a papermaking initial-period set thickness, wherein the papermaking initial-period set thickness is set to be thicker than a papermaking normal-state set thickness, which is a thickness of a normal-state region of the wet paper web, the normal-state region of the wet paper web being formed following the leading edge region of the wet paper web.

Description

technical field [0001] The present invention relates to a waste paper regeneration treatment device installed in offices where waste paper is generated, etc., capable of regenerating paper, and more specifically relates to paper thickness control technology at the initial stage of papermaking. Background technique [0002] In the past, as a waste paper regeneration treatment device of a paper machine, a pulp suspension containing recycled pulp regenerated from waste paper was injected into the papermaking screen of the papermaking section and then made into wet paper, and then the wet paper was passed from the papermaking wire The web is transferred to the felt belt in the dewatering section, and the wet paper is dehydrated with the felt belt, and then the wet paper is dried in the drying section, and the dried dry paper is transferred to the finishing section. [0003] As a prior art document of such a papermaking technique, there exists, for example, Japanese Patent Laid-O...

AI Technical Summary

Problems solved by technology

[0005] However, when the wet paper is not transferred from the papermaking wire mesh to the felt belt well, the front edge of the wet paper becomes torn, and the front edge of the wet paper transferred to the felt belt does not have a straight line in the paper width direction. shape, and becomes a zigzag fracture shape in which a protruding area protruding forward in the paper feeding direction and a receding area receding backward are mixed

[0006] Therefore, when the dry paper is peeled from the drying section with a scraper, part of the front edge of the peeled paper enters the front side of the scraper, and the other part enters the back side of the scraper, so the front edge of the paper is torn by the scraper. The phenomenon of cracking becomes the cause of paper jam

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