Defoaming device and defoaming method for aramid fiber III spinning solution

A fiber spinning and spinning liquid technology, which is applied in spinning solution filtration, fiber treatment, filament forming treatment, etc., can solve the problems of low defoaming efficiency, low production capacity, low production efficiency, etc., and achieve the reduction of liquid Effects of thickness, guaranteed stability, and accelerated efficiency

Inactive Publication Date: 2019-03-29
四川辉腾科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high dynamic viscosity of the spinning solution, it is difficult to remove the air bubbles
Generally, it is necessary to use a large storage tank for long-term decompression and degassing, and the long-term static stay of the spinning solution increases the turnover of the spinning solution, resulting in low production efficiency
[0004] At present, the domestic general use volume is 1 ~ 3m 3 Multiple parallel storage tank devices for static intermittent decompression degassing; usually 1m 3 The dynamic viscosity of the volume is 100000Pa.s. It takes more than 12 hours for the aramid fiber spinning solution to completely remove the bubbles, so the degassing efficiency of the device is very low, the production capacity is not high, and multiple degassing kettles are needed, which occupies an area Problems such as large area and high equipment cost

Method used

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  • Defoaming device and defoaming method for aramid fiber III spinning solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Prepare 500 kg of aramid fiber spinning solution with a dynamic viscosity of 1,000,000 Pa.s; turn on the vacuum system of the defoaming tower, and adjust the vacuum degree to -80kpa; turn on the thermostatic jacket device, and set the temperature to 25°C; Send into the umbrella plate type defoaming device of the present invention; Open delivery pump after 30min; Sampling aramid fiber III fiber spinning liquid; All the other enter spinning process and carry out single-station 1100dtex model spinning effect verification;

[0032] vs. 2m 3 See Table 1 for the monitoring result data of storage tank static defoaming spinning solution:

[0033] Table 1

[0034]

Embodiment 2

[0036] Prepare 500 kg of aramid fiber III fiber spinning solution with a dynamic viscosity of 1,250,000 Pa.s; turn on the vacuum system of the defoaming tower, and adjust the vacuum degree to -85kpa; turn on the thermostatic jacket device, and set the temperature at 28°C; Send into the umbrella plate type defoaming device of the present invention; Open delivery pump after 60min; Sampling aramid fiber III fiber spinning solution; All the other enter spinning procedure to carry out single-station 1100dtex model spinning effect verification;

[0037] vs. 2m 3 See Table 2 for the monitoring result data of storage tank static defoaming spinning solution:

[0038] Table 2

[0039]

Embodiment 3

[0041] Prepare 500kg of aramid fiber III fiber spinning solution with a dynamic viscosity of 1500000Pa.s; turn on the vacuum system of the defoaming tower and adjust the vacuum degree to -90kpa; turn on the thermostatic jacket device and set the temperature to 30°C; Send into the umbrella plate type defoaming device of the present invention; Open delivery pump after 60min; Sampling aramid fiber III fiber spinning solution; All the other enter spinning procedure to carry out single-station 1100dtex model spinning effect verification;

[0042] vs. 2m 3 See Table 3 for the monitoring result data of storage tank static defoaming spinning solution:

[0043] table 3

[0044]

[0045] It can be seen from the data in Tables 1 to 3 that the aramid III fiber spinning liquid multi-stage defoaming tower device provided by the embodiment of the present invention has faster defoaming, faster spinning liquid turnover, and lower equipment cost than the static decompression degassin...

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Abstract

The invention discloses a defoaming device and a defoaming method for an aramid fiber III spinning solution. The defoaming device comprises a defoaming tank and a circulatory system arranged on the outside of the defoaming tank, wherein a spinning solution feeding opening and a vacuum pump are arranged at the top of the defoaming tank; a discharging opening with a spinning solution delivery pump is formed in the bottom of the defoaming tank; the circulatory system is connected with the discharging opening and the spinning solution feeding opening; a multistage umbrella plate device for defoaming is arranged in the defoaming tank. According to the defoaming device disclosed by the invention, by adopting the multistage umbrella plate device, a high viscosity aramid fiber III spinning solution enters the multi-stage umbrella plate device in the defoaming tank through the feeding opening, the defoaming efficiency of a static mode in the prior art is improved and the structure of the defoaming tank is simplified. The device has the advantages of simple structure, low cost and small occupied area. When the device is used for a defoaming process, the number of the obtained minute bubbleswith the diameter below 0.03 mm is smaller than 5 and the loss amount of solvents in the defoaming process is smaller than 0.5 percent.

Description

technical field [0001] The invention belongs to the technical field of high-performance organic fiber manufacturing, and in particular relates to a defoaming device and a defoaming method for aramid fiber III fiber spinning solution. Background technique [0002] Aramid III fiber (heterocyclic aramid) refers to a type of para-aramid fiber containing aromatic heterocycles in the main chain, and the typical aromatic heterocycle is a benzimidazole ring. According to theoretical calculations, the strength of fibers synthesized by terpolymerization of p-phenylenediamine, terephthaloyl chloride and benzimidazole diamines can reach 4.5-5.5GPa. And it has high thermal stability. The decomposition temperature of fully aromatic polyamide fiber can reach 550°C. It can be used in national defense, aviation, aerospace, shipbuilding, automobile and other industrial fields. [0003] In the production process of aramid III fiber, when the aramid III fiber is sent to the spinning stage afte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D1/10
CPCD01D1/103
Inventor 张胜才姚靓爽张鸥
Owner 四川辉腾科技股份有限公司
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