Top net forming machine capable of adjusting two-side difference of paper

Abstract

The invention discloses a top net forming machine capable of adjusting a two-side difference of paper. The top net forming machine comprises a top net suction box and a bottom net suction box. The top net suction box is composed of a plurality of top net suction areas arranged in the heading direction of the paper in sequence, each top net suction area comprises a water scraping plate used for scraping moisture on the surface of the paper and arranged on the lower surface of the top net suction box, a water blocking plate preventing backflow of water in the top net suction areas and a top net drain pipe arranged on the bottom portion of the top net suction areas, and a water suction channel is formed between each water scraping plate and each water blocking plate. The bottom net suction box comprises a plurality of bottom net suction area arranged in the heading direction of the paper in sequence, a blastpipe arranged in the bottom net suction areas and a bottom net drain pipe. Through the mentioned structure, the top net forming machine has the advantages of independently adjusting the upward dehydration amount and the downward dehydration amount of wet paper and the two-side difference of the paper on the basis of not influencing the normal operating of a top net and paper evenness adjusting.

Description

technical field [0001] The invention relates to the technical field of pulp and papermaking, in particular to a top wire former capable of adjusting the difference between two sides of paper. Background technique [0002] The traditional fourdrinier paper machine relies on one side for dehydration, so that the retention of fillers and fine fibers on the web side is low, and the web side of the formed paper is rougher than the front side, resulting in a large difference between the two sides of the paper. At the same time, with the dehydration of the wire part, the concentration of the pulp layer continues to increase, and the fibers in the pulp layer begin to flocculate. With the increase of the concentration, the degree of flocculation also begins to intensify, resulting in poor evenness of the paper. [0003] In some domestic paper mills, in order to improve the paper formation of fourdrinier paper machines, in addition to selecting a good headbox, they often improve the f...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, provide a top wire former that can adjust the difference between the two sides of the paper, and solve the problem that the prior art cannot independently adjust the dehydration amount of the wet paper sheet up and down and the difference between the two sides of the paper Shortcomings

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