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Efficient cleaning method and device for dry-jet wet-spinning carbon fiber precursor spinneret plate

A carbon fiber precursor, dry-jet wet-spinning technology, applied in the direction of textiles, papermaking, spinneret assembly, etc., can solve the problems of too long cleaning solution, can not be reused, spinneret thickness, etc., to improve the collision probability, Reduced cleaning time, environmentally friendly effect

Pending Publication Date: 2021-08-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Because dry-jet wet spinning is high-pressure spinning, the spinneret is relatively thick, and the long diameter of the capillary holes of the spinneret is relatively large (compared to the wet spinning spinneret). Under the current traditional cleaning technology conditions, The slurry remaining in the spinneret hole cannot be cleaned
Moreover, the spinneret is subjected to high-temperature solvent cooking and concentrated sulfuric acid or chromic acid chemical cleaning or physical mechanical cleaning, the surface of the spinneret is prone to corrosion and damage to the channels, and the cleaning time is too long and the cleaning solution cannot be reused. , which greatly reduces the service life of the spinneret, brings about unstable factors of the nozzle, and restricts the quality improvement of the raw silk

Method used

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  • Efficient cleaning method and device for dry-jet wet-spinning carbon fiber precursor spinneret plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] An efficient cleaning method for dry spray wet spinning carbon fiber precursor spinneret, the specific steps are:

[0066] 1) The spinneret and its components are connected to the branch bypass of the circulating cleaning device through quick connections, and are vertically fixed to the upper cover of the solvent tank. The cleaning agent is a mixture of sulfoxide and dimethylacetamide, the purity of sulfoxide is 99.9%; the mass ratio of sulfoxide to dimethylacetamide is 10:2; the temperature of the cleaning agent is 80-95°C, rinse spray The time for silk board is 20min, and the pressure of cleaning agent flushing is 0.45MPa.

[0067] 2) Start the circulating pump and filter (including the filter and corresponding valves and other structures, so that the cleaning agent flows from the solvent tank to the spinneret).

[0068] 3) After the slurry in the spinneret is sprayed out with the solvent, stop the circulation pump, switch the spinneret and its components from the by...

Embodiment 2

[0074] An efficient cleaning method for dry spray wet spinning carbon fiber precursor spinneret, the specific steps are:

[0075] 1) The spinneret and its components are connected to the branch bypass of the circulating cleaning device through quick connections, and are vertically fixed to the upper cover of the solvent tank. The cleaning agent is a mixture of sulfoxide and dimethylacetamide, the purity of sulfoxide is 99.9%; the mass ratio of sulfoxide to dimethylacetamide is 9:2; the temperature of the cleaning agent is 80-95°C, rinse spray The time for silk board is 20min, and the pressure of cleaning agent flushing is 0.45MPa.

[0076] 2) Start the circulation pump and filter system.

[0077] 3) After the slurry in the spinneret is sprayed out with the solvent, stop the circulation pump. Switch the spinneret and its components from the bypass to the solvent circulation tank, and install it vertically on the positioning tank through a quick connection.

[0078] 4) Restar...

Embodiment 3

[0083] An efficient cleaning method for dry spray wet spinning carbon fiber precursor spinneret, the specific steps are:

[0084] 1) The spinneret and its components are connected to the branch bypass of the circulating cleaning device through quick connections, and are vertically fixed to the upper cover of the solvent tank. The cleaning agent is a mixture of sulfoxide and dimethylacetamide, the purity of sulfoxide is 99.9%; the mass ratio of sulfoxide to dimethylacetamide is 9:2; the temperature of the cleaning agent is 80-95°C, rinse spray The time for silk board is 20min, and the pressure of cleaning agent flushing is 0.45MPa.

[0085] 2) Start the circulating pump and filter.

[0086] 3) After the slurry in the spinneret is sprayed out with the solvent, stop the circulation pump. Switch the spinneret and its components from the bypass to the solvent circulation tank, and install it vertically on the positioning tank through a quick connection.

[0087] 4) Restart the c...

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Abstract

The invention relates to an efficient cleaning method and device for a dry-jet wet-spinning carbon fiber precursor spinneret plate. The method comprises the specific steps that (1) the spinneret plate and an assembly thereof are connected with a branch bypass of a circulating cleaning device through a quick connector and are vertically fixed to an upper cover of a solvent tank; (2) a circulating pump and a filter are started; (3) after slurry in the spinneret plate is sprayed out along with the solvent, the circulating pump is stopped, the spinneret plate and the assembly thereof are switched into a solvent circulating tank from a bypass, and are vertically mounted on a positioning groove through the quick connector; 4) the circulating pump and the filter are re-started; and (5) after cleaning in the step (4) is completed, the spinneret plate is soaked in water, and ultrasonic cleaning is conducted on the spinneret plate, and the cleaned spinneret plate is obtained. The cleaning effect of the spinneret plate is provided, the surface of the spinneret plate is made to be smooth and free of damage and corrosion, then ultrasonic cleaning in deionized water is conducted, the removal effect is enhanced, and slurry remaining in spinneret holes in the spinneret plate is completely removed.

Description

technical field [0001] The invention belongs to the technical field of spinneret cleaning, and in particular relates to an efficient cleaning method and device for a dry-jet wet spinning carbon fiber precursor spinneret. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] High-performance polyacrylonitrile-based carbon fiber has excellent properties such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, electrical conductivity, heat transfer and small thermal expansion coefficient, so it is widely used in aerospace and military fields. Formalized and large-scale applications have been rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D4/04
CPCD01D4/04
Inventor 朱波律建国赵圣尧刘亚运康万平纪进涛王洪利
Owner SHANDONG UNIV