Drying device for papermaking

Abstract

The invention provides a drying device for papermaking. The device comprises a plurality of sets of dry mesh loops and a plurality of rows of drying cylinder sets, wherein the drying cylinder sets inevery two adjacent rows are staggered, and each set of the dry mesh loop cooperatively used by the corresponding drying cylinders compress paper sheets on the surfaces of the heated drying cylinders from top or from bottom respectively; each dry mesh loop comprises a dry net and a plurality of guiding roller used for supporting the corresponding dry net, and is further provided with at least one heating roller used for heating the corresponding polyester woven dry net. The drying device for papermaking has the advantages that since the heating rollers are arranged in drying boxes, also heat the polyester woven dry nets and remove moisture of the polyester woven dry nets, when the polyester woven dry nets compress the paper sheets on the surfaces of the heated drying cylinders from top or from bottom respectively, the paper sheets are heated both internally and externally, so that the moisture loss inside and outside the paper sheets is basically the same, thereby achieving the situation that the moisture distribution inside and outside the paper sheets is uniform, and the gloss, color and other physical properties of the front and back faces of the paper sheets are kept consistent.

Description

technical field [0001] The invention relates to the technical field of drying devices, in particular to a drying device for a paper machine. Background technique [0002] The paper machine is the combined equipment for paper making, mainly composed of wire, press and drying. There are two types of wire mesh, cylinder wire and fourdrinier wire, the press section is composed of press rolls and papermaking felt, and the drying section is composed of one or several drying cylinders. [0003] In the drying section, it is divided into front group drying cylinders and rear group drying cylinders, generally each has 6 drying cylinders, totaling 12 drying cylinders. At the same time, two sets of dryer wire loops (flat wires) are used in conjunction with the front and rear dryer cylinders, one from above and the other from below to press the paper sheet tightly onto the surface of the heated cylinder. The drying of the paper sheet is to achieve the dryness required by the product pr...

AI Technical Summary

Problems solved by technology

[0005] Polyester Woven Dryer Fabric When one presses the sheet tightly onto the heated cylinder surface from above and the other from below, the polyester woven fabric will also A large amount of moisture is attached; in this way, during the drying process of the paper sheet, the moisture near the dryer cylinder is quickly dried; and because the polyester woven dry mesh will also adhere to a large amount of moisture; the moisture outside the paper sheet near the dryer cylinder cannot It is dried in time; the moisture distribution inside and outside the paper is uneven, which causes the gloss, color and other physical properties of the front and back of the dried paper to be inconsistent.

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