Cleaning method and equipment of spinneret plate for polyacrylonitrile fiber

A technology of polyacrylonitrile and spinneret, applied in the direction of spinneret assemblies, chemical instruments and methods, detergent compositions, etc., can solve the problems of restricting fiber quality, long cleaning time, increasing the amount of raw silk, etc. To achieve the effect of increasing the probability of collision, reducing cleaning time and facilitating operation

Inactive Publication Date: 2015-07-15
ZHONGFU SHENYING CARBON FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Blocking or semi-blocking will increase the amount of raw silk, reduce the stability of the nozzle, and directly affect the quality of raw silk
However, under the current cleaning technology, there will be problems in the cleaning of the spinneret that the spinneret hole cannot be cleaned, the surface of the spinneret will be corroded at high temperature, the cleaning time is too long, and the cleaning solution cannot be reused. It greatly reduces the service life of the spinneret, brings instability to the nozzle, and restricts the improvement of fiber quality

Method used

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  • Cleaning method and equipment of spinneret plate for polyacrylonitrile fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Fix the spinneret on the spinneret holder, add 10% NaOH aqueous solution to pure dimethyl sulfoxide, control the pH value of the cleaning solution to 12, heat the cleaning solution to 50°C, turn on the circulation pump, and circulate and filter The system uses a 3um metal filter rod to filter, the vacuum degree is controlled at -100KPa, the ultrasonic device is turned on and the frequency is controlled at 25KHz, and the cleaning time is 2h.

[0029] After cleaning, the surface of the spinneret was smooth without corrosion, and the plugging rate of each spinneret hole was 0%.

Embodiment 2

[0031] Fix the spinneret on the spinneret holder, add KOH solution with a mass concentration of 1,5% to pure dimethyl sulfoxide, control the pH value of the cleaning solution to 14, heat the cleaning solution to 40°C, and turn on the circulation pump , The circulating filtration system uses a 5um metal filter rod for filtration, the vacuum degree is controlled at -90KPa, the ultrasonic device is turned on and the frequency is controlled at 25KHz, and the cleaning time is 2.5h.

[0032] After cleaning, the surface of the spinneret was smooth without corrosion, and the plugging rate of each spinneret hole was 0%.

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Abstract

The invention relates to a cleaning method of a spinneret plate, in particular to a cleaning method and cleaning equipment of the spinneret plate for polyacrylonitrile fiber. In the vacuum cleaning environment, an alkaline spinneret plate cleaning solution is heated, circulating dissolved cleaning is performed on polyacrylonitrile (PAN) on the spinneret plate, auxiliary cleaning of ultrasonic vibration wave oscillation is performed in the whole cleaning process, and the cleaning solution is filtered by an external circulating system, so that no impurity in the cleaning solution in the vacuum environment is guaranteed. The cleaning method has the advantages of short process flow, simple equipment and good cleaning effect, and the cleaning solution can be reused.

Description

technical field [0001] The invention relates to the technical field of spinneret cleaning in the polymer chemical fiber industry, in particular to a cleaning method and cleaning equipment for a spinneret for polyacrylonitrile (PAN) fibers. Background technique [0002] In the production of polyacrylonitrile fibers, the stability of the nozzle and the number of hairs have a great relationship with the cleanliness of the nozzle. Blocking or half-blocking will increase the quantity of raw silk, reduce the stability of the nozzle, and directly affect the quality of raw silk. However, under the current cleaning technology, there will be problems in the cleaning of the spinneret that the spinneret hole cannot be cleaned, the surface of the spinneret will be corroded at high temperature, the cleaning time is too long, and the cleaning solution cannot be reused. The service life of the spinneret is greatly reduced, the instability of the nozzle is brought, and the improvement of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D4/04C11D7/60C11D7/50
CPCD01D4/04C11D7/5009C11D7/5013
Inventor 陈秋飞王磊刘栋
Owner ZHONGFU SHENYING CARBON FIBER
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