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Pre-mixing device used for lyocell fiber preparation

A premixer and fiber technology, applied in the direction of feeding the solution to the spinneret, etc., can solve the problems of uneven upper and lower mixing, fast outflow of liquid medium, and white core formation, so as to avoid the decline of fiber quality and improve the effect of fiber quality.

Active Publication Date: 2015-12-02
SHANDONG YINGLI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Uneven pre-mixing can easily lead to problems such as uneven fiber solid content and white core formation, which will bring difficulties to subsequent transportation, filtration, spinning and other processes, and directly affect the quality of lyocell fibers
[0003] At present, the vertical pre-mixer is the mainstream of production, but it is suitable for low-viscosity media. For high-viscosity materials, using a vertical pre-mixer will easily lead to uneven mixing from top to bottom.
In addition, some manufacturers use horizontal pre-mixers, but there are still problems such as uncontrolled pre-mixing time and rapid outflow of liquid media.

Method used

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  • Pre-mixing device used for lyocell fiber preparation
  • Pre-mixing device used for lyocell fiber preparation
  • Pre-mixing device used for lyocell fiber preparation

Examples

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Embodiment 1

[0029] Such as figure 1 with figure 2 Commonly shown, a premixer for lyocell fiber preparation includes a premixer body 1 arranged horizontally, specifically, the inner diameter of the premixer body is 20-30 cm, and the length is 50-500 cm. 1 is provided with a stirring screw 2 along the axial direction, and a propeller blade 3 is provided on the stirring screw 2. The pulp material inlet 4 and the solvent and additive inlet 5 are arranged on the top of one end of the premixer body 1, and the bottom of the other end is provided with a row The feed opening 6, the pre-mixer body 1 is provided with a baffle 7 which slides along the circumferential direction, the propeller blade 3 is provided with a gap for accommodating the baffle 7, and the pre-mixer body 1 is provided with an adjustment mechanism for controlling the sliding of the baffle 7.

[0030] In this embodiment, the inner wall of the pre-mixer body 1, the stirring screw 2, the propeller blade 3 and the surface of the ba...

Embodiment 2

[0038] Such as image 3As shown, this embodiment has basically the same structure as Embodiment 1, the difference is that the pulp material inlet 4 and the solvent and additive inlet 5 are arranged close to each other, specifically, the pulp material inlet 4 and the solvent and additive inlet 5 Arranged side by side on the 1st circumference of the pre-mixer body.

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Abstract

The invention belongs to the technical field of lyocell fiber, and particularly relates to a pre-mixing device used for lyocell fiber preparation. The pre-mixing device comprises a pre-mixing device body which is transversely arranged. A stirring threaded rod is axially arranged in the pre-mixing device body. A spiral propeller blade is arranged on the stirring threaded rod. A pulp material inlet and a solvent and additive inlet are formed in the top of one end of the pre-mixing device body. A material outlet is formed in the bottom of the other end of the pre-mixing device body. A baffle is arranged in the pre-mixing device body in the circumferential direction in a sliding mode. A gap used for containing the baffle is formed in the spiral propeller blade. A regulation device used for controlling the baffle to slide is arranged on the pre-mixing device body. The pre-mixing device is uniform in feeding, controllable in ratio, capable of effectively controlling the pre-mixing time and the material outflow speed, good in pre-mixing effect, and free of cellulose pulp not infiltrated by solvent.

Description

technical field [0001] The invention belongs to the technical field of Lyocell fiber, and in particular relates to a premixer for preparing Lyocell fiber. Background technique [0002] Lyocell fiber (that is, soluble fiber) is known as the green fiber of the 21st century. It uses N-methylmorpholine-N-oxide (NMMO) as a solvent for regenerated cellulose fiber by wet spinning. Lyocell fiber has the advantages of high strength, good dyeability, good spinning performance, short production process and no pollution, and wide industrial application. Therefore, the market demand for Lyocell fiber has continued to increase in recent years. The preparation of spinning dope is the most critical process of Lyocell fiber production. Cellulose has high crystallinity, rigid chains, and many hydrogen bonds, so it is difficult to dissolve smoothly in concentrated NMMO aqueous solution, and the premixing effect of cellulose pulp and concentrated NMMO aqueous solution with a content of about 8...

Claims

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Application Information

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IPC IPC(8): D01D1/06
Inventor 孙永连朱波李贵山李晓东刘建伟潘召军袁法超
Owner SHANDONG YINGLI IND
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