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Cleaning system and cleaning method of dry-jet wet spinning spinneret plate for preparing polyacrylonitrile protofilaments

A technology of polyacrylonitrile, dry spray and wet spinning, applied in spinneret assembly, textile and papermaking, etc., can solve the problems of poor cleaning effect, long cleaning time, affecting the spinning quality, etc.

Active Publication Date: 2014-12-03
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the dry-jet wet spinning spinneret is relatively thick, there are disadvantages such as poor cleaning effect and long cleaning time in a single method, which seriously affects the spinning quality. Therefore, the cleaning of the dry-jet wet spinning spinneret for PAN raw silk has become an urgent need big problem solved

Method used

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  • Cleaning system and cleaning method of dry-jet wet spinning spinneret plate for preparing polyacrylonitrile protofilaments
  • Cleaning system and cleaning method of dry-jet wet spinning spinneret plate for preparing polyacrylonitrile protofilaments
  • Cleaning system and cleaning method of dry-jet wet spinning spinneret plate for preparing polyacrylonitrile protofilaments

Examples

Experimental program
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Effect test

Embodiment 1

[0060] This embodiment provides a cleaning system for dry-jet wet spinning spinnerets for preparing polyacrylonitrile precursors, which includes a pre-soaking device, a circulation cleaning device, and a steam treatment device, and its structures are as follows: figure 1 , figure 2 , image 3 shown.

[0061] Such as figure 1 As shown, the pre-soaking device includes a spinneret pre-soaking tank 1, one side of the spinneret pre-soaking tank 1 is provided with a desalinated water inlet 6, a DMSO inlet 5, a compressed air inlet 4, and a spinneret A horizontal partition 3 is arranged inside the presoak tank 1, the height of the partition 3 is between the desalted water inlet 6 and the DMSO inlet 5, and the compressed air inlet 4 is connected to the nozzle 2 located inside the spinneret presoak tank 1, For input compressed air;

[0062] The inside of the spinneret presoak tank 1 is connected with a steam heating device, which is a steam heating pipeline, and the steam heating ...

Embodiment 2

[0068] This embodiment provides a method for cleaning the spinneret for dry-jet wet spinning for preparing polyacrylonitrile precursor, which uses the cleaning system provided in Example 1 to clean the spinneret according to the following steps:

[0069] (1) Pre-cleaning with DMSO solvent

[0070] a. Inject DMSO solvent enough to immerse the spinneret into the spinneret pre-soaking tank 1 through the DMSO inlet 5 to keep the liquid level in the tank at 60-70%, and at the same time, pass compressed air into the tank through the compressed air inlet 4 , and sprayed out from the nozzle 2 to ensure that the cleaning liquid is submerged in the spinneret and is in a flowing state;

[0071]b. Place the spinneret on the partition plate 3 in the spinneret pre-soaking tank 1, steam enters through the steam inlet 7 to heat the DMSO solvent in the spinneret pre-soaking tank 1, and adjust the regulating valve group 9 and The temperature controller 11 controls the temperature of the DMSO s...

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Abstract

The invention relates to a cleaning system and a cleaning method of a dry-jet wet spinning spinneret plate for preparing polyacrylonitrile protofilaments. The cleaning system comprises a pre-soaking device used for pre-soaking the spinneret plate, a cyclic cleaning device used for carrying out cyclic cleaning on the spinneret plate and a steam treatment device used for carrying out steam treatment on the spinneret plate. The cleaning method comprises the following steps of pre-cleaning the spinneret plate by utilizing DMSO (Dimethylsulfoxide); flushing the pre-soaked spinneret plate through desalted water; cyclically cleaning the spinneret plate by the DMSO; flushing the cyclically cleaned spinneret plate through the desalted water; carrying out steam treatment on the spinneret plate through the steam; carrying out ultrasonic cleaning on the spinneret plate subjected to the stream treatment; blowing the spinneret plate subjected to the ultrasonic cleaning by compressed air; detecting the cleaned spinneret plate and repeatedly treating the unqualified spinneret plate until the spinneret plate is qualified. The cleaning method has the advantages of short process flow, less using equipment, simple equipment structure and very good cleaning effect, and the cleaning rate of attachments of the spinneret plate is up to 99.99%.

Description

technical field [0001] The invention relates to a cleaning system and method for a dry-jet wet-spinning spinneret for preparing polyacrylonitrile precursors, and belongs to the technical field of equipment cleaning for polymer material preparation. Background technique [0002] The dry-jet wet spinning spinneret is the main component for the preparation of high-performance carbon fiber polyacrylonitrile (PAN) precursors by dry-jet wet spinning. The silk liquid flows into the coagulation bath through a small air layer and coagulates to form primary fibers. [0003] During the spinning process of dry-jet wet spinning, due to the influence of factors such as high viscosity and high molecular weight of the spinning solution used in dry-jet wet spinning, poor filtration of the spinning solution, and poor uniformity of the spinning solution, the spinneret is easy to block holes, Dripping or diffuse plate, or even unable to spin, will greatly affect the spinnability and fiber qual...

Claims

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Application Information

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IPC IPC(8): D01D4/04
Inventor 蔡小平刘中强姜立军方静孙金峰邵洪芳刘军吴永兴李建卓谷峰
Owner PETROCHINA CO LTD
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