A diffusive paper humidifying device

Abstract

The invention relates to the field of paper making equipment, in particular to diffusible paper moistening equipment. The diffusible paper moistening equipment at least comprises an upper moistening box above paper conveyed by a roller shaft, and an upper moistening chamber is formed between the upper moistening box and the paper. Upper moistening bins and a plurality of upper heating bins are arranged in the upper moistening box. The lower ends of the upper moistening bins are communicated with the upper moistening chamber, and upper steam spray openings communicated with an upper moistening steam pipeline are formed in the upper moistening bins. A top plate of the upper moistening chamber is formed by combining lower side face plates of the upper heating bins. The paper moistening equipment is good in moistening effect. On one hand, the problems that in the upper humidification process, steam is condensed into water drops, and the water drops drop on the paper to damage the paper are solved. On the other hand, the use standard for initial steam pressure is lowered.

Description

technical field [0001] The invention relates to the field of papermaking equipment, in particular to a diffuse paper humidifying equipment. Background technique [0002] The existing paper machine includes the following structure in sequence: sizing system→headbox→wire part→press part→drying part→calender→winding machine. However, the quality index "smoothness", "air permeability" and "tightness" of the paper produced by drying and calendering in the drying section are mutually restricted, and the overall quality of the paper cannot be guaranteed. Therefore, some people imagine calendering by calender before drying, but in practice, it will be found that this kind of semi-wet calendering cannot be realized at all. The reason is that the paper is wet as a whole before drying, including the inside and the surface. In calendering, the paper sticks to the calender rolls without formation. [0003] Aiming at the above-mentioned technical problems in the paper forming process, t...

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Problems solved by technology

However, in actual production, it was found that the paper humidifying equipment that was previously applied for had limitations in terms of conditions. Specifically, the paper humidifying equipment used nozzles and had a certain standard for the use of steam pressure. When the value is low, the steam in the nozzle cannot be ejected normally and water droplets will be generated, so that the paper cannot be humidified

[0004] Aiming at the problem of steam pressure, the solution is to provide steam with sufficient pressure from paper mills, but now many paper mills do not supply steam themselves, most of them are supplied by the park, and in order to neutralize the needs of various enterprises, the park has other There is a possibility that the steam pressure cannot meet the steam pressure standard of the humidification equipment; at the same time, there is also the possibility that some paper mills have lowered the temperature and pressure of the steam according to the steam needs of their own paper machines when the steam is transported into the factory

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