Circular beating material feeding method in papermaking and device thereof

Abstract

The invention provides a circulation beating and feeding method in the papermaking process, specifically, the columnar solid pulp column in the conveying pipeline is dispersed by a dispersing member and falls into the circulation tower close to or along the tower wall; a circulation beating and feeding device, It includes a circulation tower body and a slurry collection pipe, and is characterized in that: it includes a slurry dispersion component, and the slurry dispersion component is connected to the circulation tower body and the slurry collection pipe respectively; the dispersion components can be radial dispersion channels, electric rotation Dispersion pipe and other structures. The present invention can transform the slurry from concentrated falling to scattered falling along the surroundings. At the same time, due to the impact of the falling slurry on the slurry in the tower, the blocking effect of the tower wall on the slurry in the tower is reduced, so that the slurry in the tower The material will drop in a steady state, reduce the degree of turbulent flow, and make the slurry flow out of the circulation tower in an orderly manner, thereby improving the beating quality, papermaking performance and paper quality.

Description

technical field [0001] The invention relates to a paper-making feeding technology, in particular to a method and a device for circulating beating and feeding during the paper-making process. Background technique [0002] In the production practice of disc refiner circulation beating in the existing papermaking process, the quality of beating cannot meet the requirements of production because the slurry is beaten through one or more disc refiners; at this time, in order to improve the beating quality, often In the way of circular beating, the slurry is passed through the same or multiple disc refiners again or multiple times until the beating quality of the slurry meets the production requirements; in order to realize the circular beating, it is necessary to transfer the circulation in the existing pre-milling tower Slurry, the circulating slurry is directly sent into the pre-mill tower through the slurry pipe, and the slurry is concentrated in a...

AI Technical Summary

Problems solved by technology

[0002] In the production practice of disc refiner circulation beating in the existing papermaking process, the quality of beating cannot meet the requirements of production because the slurry is beaten through one or more disc refiners; at this time, in order to improve the beating quality, often In the way of circular beating, the slurry is passed through the same or multiple disc refiners again or multiple times until the beating quality of the slurry meets the production requirements; in order to realize the circular beating, it is necessary to transfer the circulation in the existing pre-milling tower Slurry, the circulating slurry is directly sent into the pre-mill tower through the slurry pipe, and the slurry is concentrated in a solid column and falls at a certain point in the tower, resulting in a fast flow of the slurry at the drop point, while at other positions, especially in the tower Due to the friction between the slurry and the tower wall around the wall, the flow rate of the slurry is relatively slow. Therefore, the flow rate of the slurry at each position in the tower is different, and the front and rear slurry moves in a staggered manner, and cannot flow out of the circulation tower in a balanced and orderly manner. The beating effect of the pulp is uneven, which affects the beating performance of the pulp. This phenomenon is especially obvious for the medium-concentration pulp.

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