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Carbon fiber production stock solution post-treatment method and device

A carbon fiber and dope technology, applied in chemical post-treatment of rayon, chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of inconvenient operation, uneven mixing, insufficient reaction, etc., and achieve improved stability, simple structure, and easy operation. handy effect

Active Publication Date: 2021-11-30
山东永成新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims at the technical problems of uneven mixing, insufficient reaction, and difficult quantitative control of the degree of ammoniation during ammonification of the existing carbon fiber production stock solution, which lead to unstable stock solution quality, inconvenient operation, and difficulty in realizing high-load continuous production. A post-treatment method and device for carbon fiber production stock solution capable of accurately controlling the degree of ammoniation of stock solution, uniform mixing of ammonia gas and stock solution, convenient operation, and high-load continuous production

Method used

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  • Carbon fiber production stock solution post-treatment method and device
  • Carbon fiber production stock solution post-treatment method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The original solution after the removal of the order is transported to the defoaming tower 8 through the gear pump I6, ammonia enters the pipeline I11 through the ammonia nozzle 3, starts the gear pump I6, adjusts the opening of the gear pump I6, and calculates the copolymerization of the original solution Monomer itaconic acid (hereinafter referred to as M 2 ) number of moles, to obtain 0.65 times the amount of ammonia gas M 2 The number of moles, the control state is manual at this time, and the pressure before the inlet of the gear pump I 6 is 0.01-0.03MPa. Open the valve of ammonia steel cylinder 5, ammonia enters in the pipeline I11 through the pressure reducing valve on the pipeline III 13, filter 4, thermal flowmeter 2, adjust the ammonia flow to be 0.65 times M 2 The number of moles, the outlet pressure of the ammonia gas after passing through the filter 4 is adjusted at 0.2-0.3MPa, after completion, the manual state is converted into an automatic state. Ammon...

Embodiment 2

[0045] Different from embodiment 1, adjust the opening degree of gear pump I 6, calculate M in the stoste 2 The number of moles, to get 0.75 times the amount of ammonia gas M 2 Number of moles, adjust the ammonia flow rate to 0.75 times M 2 The number of moles, sampling inspection, the pH value of the stock solution is 9.2, the degree of neutralization of ammonia is 1.11, and there is no bubble.

Embodiment 3

[0047] Different from embodiment 1, adjust the opening degree of gear pump I 6, calculate M in the stoste 2 Number of moles, get 0.85 times the amount of ammonia gas M 2 Number of moles, adjust the ammonia flow rate to 0.85 times M 2 The number of moles, sampling inspection, the pH value of the stock solution is 9.6, the neutralization degree of ammonia is 1.24, and there is no bubble.

[0048] The technical scheme of the application has simple structure, convenient operation, and the stability of the stock solution after full ammoniation is significantly improved, which provides a basic guarantee for the production of high-quality carbon fibers.

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Abstract

The invention provides a carbon fiber production stock solution post-treatment method and device. The device is provided with a demonomerisation tower, a defoaming tower, a stock solution storage tank and an ammonia gas steel cylinder, wherein the demonomerisation tower is connected with the defoaming tower through a pipeline I; the defoaming tower is connected with the stock solution storage tank through a pipeline II; the pipeline I is provided with a gear pump I and a static mixer; the static mixer is located at the downstream of the gear pump I; the pipeline II is provided with a gear pump II; the ammonia gas steel cylinder is provided with a pipeline III; the pipeline III is provided with an ammonia gas nozzle; the pipeline III is connected onto the pipeline I through the ammonia gas nozzle; and the pipeline III is further provided with a filter and a thermal flow meter. The technical problems that in existing carbon fiber production stock solution post-treatment, during ammoniation, mixing is uneven, reaction is insufficient, the ammoniation degree is difficult to quantitatively control, consequently, the stock solution quality is unstable, operation is inconvenient, and high-load continuous production is difficult to achieve are solved. The carbon fiber production stock solution post-treatment method and device provided by thee invention can be widely applied to carbon fiber production.

Description

technical field [0001] The invention relates to a method and a device for after-treatment of a carbon fiber stock solution, in particular to a method and a device for a post-treatment of a carbon fiber production stock solution. Background technique [0002] In the process of carbon fiber production, there are many post-processing methods for raw liquid, including single removal, defoaming, cooling, ammoniation, concentration, storage, etc. If each step is not properly processed, it will affect the quality of carbon filaments. For carbon fiber production using DMSO as a solvent, post-treatment ammoniation is particularly important. Because DMSO is used in the air for a long time, an oxidation reaction will occur. After the oxidation reaction, the aqueous solution of DMSO will be acidic. DMSO is easy to decompose under acidic conditions, and spinning under acidic conditions will easily form holes inside the original silk, causing the original The silk is not dense, which aff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/32
CPCD01F9/32D01F11/12
Inventor 刘运波宋立志周占发张超赵彦国张伟张立坚沈传石王春晓王恩波杨昆陈志敏孙毅刘根房
Owner 山东永成新材料有限公司