Dilution water ring addition device of head box

Abstract

The invention provides an annular dilution water addition device which is suitable for a head box of a high speed paper machine. The device includes a header pipe of dilution water, a stepping motor, a dilution water valve, a branch pipe of the dilution water and an annular addition board of the dilution water. The header pipe of the dilution water is respectively connected with a plurality of branch pipes of the dilution water by the dilution water valve, and the dilution water valve is connected with the stepping motor, and a plurality of branch pipes of the dilution water are connected with the annular addition board of the dilution water; the annular addition board of the dilution water consists of a plurality of addition units which are transversely arranged on a dilution water board; the inlet of a water inlet tank is connected with the branch pipe of the dilution water and a plurality of outlets thereof are respectively connected with an annular groove; and the annular groove is positioned at the periphery of a pulp inlet hole and the inner side thereof is connected with the pulp inlet hole by an addition opening. The dilution water enters the annular addition board of the dilution water from the header pipe through the dilution water valve and the branch pipe and is evenly added into the pulp of the corresponding pipe bundle in an annular way so as to ensure that the dilution water in the local area of the addition chamber can be uniformly mixed with the pulp and improve the uniformity of the transverse local quantitative distribution of the paper.

Description

technical field [0001] The invention relates to the technical field of pulping and papermaking, in particular to a dilution water adding device for the headbox of a high-speed paper machine that controls the lateral quantitative distribution of paper sheets by adjusting the concentration of the slurry with dilution water, and specifically relates to multiple dilution water injection points at the same time. The device for uniformly adding dilution water meets the requirements of the headbox of the high-speed paper machine for the quantitative distribution of paper sheets in the transverse direction. Background technique [0002] At present, there are generally two ways to control the lateral quantitative distribution of paper sheets in paper machines. One is to partially fine-tune the opening of the headbox lip. It also follows the change; the other is to control the quantitative control of the paper sheet in the transverse direction by adding dilution water to adjust the sl...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency of local slurry concentration unevenness caused by the existing method of adding dilution water in the headbox, the present invention provides a ring-shaped dilution water adding device for the headbox, which can uniformly mix the dilution water and the slurry, and improve the concentration of the slurry. Concentration Uniformity

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