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Hydrodynamic inclined-wire stock discharge box

A headbox, hydraulic technology, used in the paper industry, can solve the problems of fiber flocculation, slow pulp speed, fiber floating or sinking, etc., to achieve good uniformity and air permeability, less floor space, and easy operation. Effect

Inactive Publication Date: 2011-08-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The headbox belongs to the open headbox, and there are certain restrictions when using it: (1) When the slurry passes through the headbox, one side communicates with the atmosphere, and there is a free slurry surface, so it is only suitable for medium and low speed inclined screens (2) It is suitable for making fibers with the same specific gravity and water, and it is not suitable for fibers with large differences in specific gravity and water, because the pulp speed is slow when the slurry passes through the upper net area with a high liquid level, which will easily cause fiber flocculation and fibers with different specific gravity float or sink

Method used

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  • Hydrodynamic inclined-wire stock discharge box
  • Hydrodynamic inclined-wire stock discharge box
  • Hydrodynamic inclined-wire stock discharge box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 Production of single-layer hydraulic inclined-wire headbox and dry bag paper

[0026] Such as figure 1 As shown, the single-layer hydraulic inclined wire headbox is composed of an adjustment mechanism 1, a side plate 2, an upper lip plate 3, a lower lip plate 4, a damping element 5, a top plate 6, a bottom plate 7, a banner dilution water device 8, and a section expander 9 And support 10 constitutes. The expander 9 is fixed on the pulp inlet side of the box; the adjustment mechanism 1 is fixed on the upper lip 3 of the box; the banner dilution water device 8 is fixed on the top plate 6 of the box; the box is connected to the upper part of the support 10 through a flange, The lower part of the support is installed on the inclined wire frame through the hinge chain, and the headbox is rotated by external force to adjust the angle of the headbox and the distance between the headbox and the inclined wire.

[0027] Such as figure 2 As shown, the damping element...

Embodiment 2

[0031] Example 2 Double-layer hydraulic type inclined wire headbox and papermaking of tea filter paper

[0032] Such as image 3 As shown, the double-layer hydraulic inclined wire headbox is composed of an adjustment mechanism 1, a side plate 2, an upper lip plate 3, a lower lip plate 4, a damping element 5, a top plate 6, a bottom plate 7, a banner dilution water device 8, and a section expander 9 , Support 10, floating sheet 11 and partition 12 constitute. The main difference between it and the single-layer hydraulic headbox is that there are two sets of expander and horizontal dilution water device. The horizontal dilution water device of the upper layer of slurry is fixed on the top plate of the box body; On the bottom plate of the box; there are two groups of damping elements along the slurry feeding direction of each layer of slurry. The two layers of slurry are separated by a partition. Float up and down to adjust the pressure balance of the two layers of slurry.

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Abstract

The invention discloses a hydrodynamic inclined-wire stock discharge box. The stock discharge box is arranged above an inclined wire part of an inclined wire machine, and comprises an adjusting mechanism, a box, a supporting seat, more than two groups of damping elements, more than one set of transverse-amplitude water diluting device and more than one set of section amplifying device, wherein the box is connected to the upper part of the supporting seat through a flange; the lower part of the supporting seat is arranged on an inclined wire frame through a hinge; and under the action of external force, the stock discharge box is rotated, and the angle of the stock discharge box and the distance between the stock discharge box and the inclined wire part are adjusted. The hydrodynamic inclined-wire stock discharge box can be applied to single-layer sizing and multi-layer sizing, is particularly suitable for the inclined wire machine, and has the advantages of compact structure, small floor area, easiness and convenience for operation and the like. The hydrodynamic inclined-wire stock discharge box can be used for manufacturing long fibered pulp with low concentration together with an inclined wire former and producing special paper with high uniformity and high air permeability.

Description

technical field [0001] The invention relates to the field of papermaking industry, in particular to a hydraulic inclined wire headbox, which can be used in cooperation with an inclined wire former to produce special paper types. Background technique [0002] Using non-plant fibers such as mineral fibers, metal fibers and synthetic fibers, or blending with plant fibers, or making them separately, many functional papers with excellent performance can be produced to meet the different needs of various industries. [0003] The non-plant fibers or some long plant fibers used for papermaking are relatively long (up to more than ten millimeters), and ordinary non-plant fibers are also hydrophobic, so the slurry suspension containing non-plant fibers needs to be highly diluted (to a low concentration of 0.02%-0.08%), in order to obtain good dispersion and sheet formation. The low forming concentration of long fibers means that a large amount of water needs to be removed during pape...

Claims

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Application Information

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IPC IPC(8): D21F1/00
Inventor 樊慧明刘建安马雅琦
Owner SOUTH CHINA UNIV OF TECH
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