A paper press device

Abstract

The invention discloses a paper pressing device which comprises a first press roll set, a second press roll set, a third press roll set and a drying cylinder which are arranged sequentially in the paper moving direction. Each press roll set comprises an upper roll and a lower roll; polyurethane encapsulation layers are arranged on the surface of the upper roll and the surface of the lower roll, a pressure sensor is arranged in the polyurethane encapsulation layer of each upper roll, blind holes and grooves are formed in the outer surfaces of the polyurethane encapsulation layers of the upper rolls and the lower rolls, the grooves are spirally distributed in the surfaces of the polyurethane encapsulation layers, and the blind holes and the grooves are alternately formed in the surfaces of the polyurethane encapsulation layers; two or more vacuum water drawing holes are formed in the bottom of each groove, vacuum pipelines are arranged in the upper rolls and the lower rolls, one end of each vacuum pipeline is connected to an external vacuumizing device, and the other ends of the vacuum pipelines are connected to the vacuum water drawing holes in the bottoms of the grooves through branch pipelines. The paper pressing device is high in dehydration rate, energy consumption is effectively reduced, and pressed paper is high in flatness.

Description

technical field [0001] The invention relates to the field of papermaking equipment, in particular to a paper pressing device for drying wet paper in the papermaking process. Background technique [0002] In the existing papermaking process, after the paper sheet is formed by the wire section, the wet paper sheet at the wire section still contains 80% of water, and must be further forced to dehydrate through mechanical pressing. While increasing the dryness, it also improves the paper quality. Physical properties, optical properties and other indicators, and then enter the drying section. From the point of view of saving energy, every time the wet paper moisture in the press section is reduced by 1%, the drying section can save 5% of steam and 10% of the cost. Paper machine output and cost reduction play an important role. [0003] The traditional paper press roll is a rubber roll, and its outer layer is covered with rubber, and blind holes are opened on the surface of the ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention provides a paper press device, which is used to solve the problems of low dryness of paper press rollers, easy folding of paper sheets and uneven dirty water in existing paper press rolls

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