Device and method for carbon fiber precursor washing

A technology of carbon fiber precursor and washing device, which is applied in the direction of processing textile material equipment configuration, liquid/gas/steam yarn/filament processing, continuous processing of textile materials, etc., which can solve the problem of short washing tank length, reduced washing effect, dead Area and other problems, to achieve the effect of increasing the effective stroke, reducing sodium ions, and improving quality

Pending Publication Date: 2017-10-20
兰州蓝星纤维有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This washing method mainly has two defects. On the one hand, the length of the washing tank is too short, only 6 meters long, and the tow stays in the water bath for a short time. Because the residual sodium ions in the tow are proportional to the washing time, it cannot be

Method used

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  • Device and method for carbon fiber precursor washing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 Shown is a device for washing carbon fiber precursors.

[0043] The device is arranged after the pickling treatment in the spinning process.

[0044] The devices include:

[0045] Washing machine godet roller group 9, circulating water tank 6, serpentine heating coil 7, spray water pump 5, spray nozzle 8, rinsing water tank 10, water retaining plate 12;

[0046] The serpentine heating coil 7 is laid on the bottom of the circulating water tank 6 to heat the washing water in the circulating water tank of the washing machine.

[0047] The washing machine godet roller group 9 is arranged above the circulating water tank 6, and the tow coming out of the pickling drawing roller group 4 is drawn through the washing machine by the washing machine godet roller group 9, enters the rinsing tank 10, and then is drawn by the washing drawing roller group 9. Group 11 is pulled to the next procedure.

[0048] The washing water in the circulating water tank 6 is tra...

Embodiment 2

[0055] One-step preparation of carbon fiber using sodium thiocyanate is usually using sodium thiocyanate as a solvent, acrylonitrile, the second monomer methyl acrylate, the third monomer itaconic acid as raw materials, and azobisisobutyronitrile as an initiator. Ternary polymerization reaction, polyacrylonitrile polymerization liquid is obtained after single removal and defoaming. The primary fiber tow is formed by wet spinning, and after the tow is washed with water and pickled, it is used figure 1 The device carries out the washing treatment of the second water washing. The concentration of the pickling solution is 1%, the temperature is 75°C, the tow passes through the pickling solution, and enters the washing machine for secondary washing, the temperature of the secondary washing water is 55°C, and the tow stays in the washing machine for 60 seconds. After washing, enter the rinsing tank, the desalinated water temperature in the rinsing tank is 50°C, the tow and the desa...

Embodiment 3

[0057] One-step preparation of carbon fiber using sodium thiocyanate is usually using sodium thiocyanate as a solvent, acrylonitrile, the second monomer methyl acrylate, the third monomer itaconic acid as raw materials, and azobisisobutyronitrile as an initiator. Ternary polymerization reaction, polyacrylonitrile polymerization liquid is obtained after single removal and defoaming. The primary fiber tow is formed by wet spinning, and after the tow is washed with water and pickled, it is used figure 1 The device carries out the washing treatment of the second water washing. The concentration of the pickling solution is 1%, the temperature is 75°C, the tow passes through the pickling solution, and enters the washing machine for secondary washing, the temperature of the secondary washing water is 60°C, and the tow stays in the washing machine for 120 seconds. After washing, enter the rinsing tank, the desalinated water temperature in the rinsing tank is 50°C, the tow and the des...

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Abstract

The invention discloses a device and method for carbon fiber precursor washing. The device comprises a rinsing machine silk guide roller group, a circulating water channel, a spraying water pump, a spraying nozzle and a rinsing water tank. The rinsing machine silk guide roller group is arranged above the circulating water channel, silk guide rollers are staggered up and down, an outlet is provided with an extrusion roll group, tows having undergone acid dipping enter the rinsing water tank through the rinsing machine silk guide roller group and the extrusion roll group, and the spraying nozzle is arranged above the rinsing machine silk guide roller group and connected with the spraying water pump. The method comprises a step 1) of conveying the desalted water to the rinsing water tank after the desalted water is heated; a step 2) of causing the desalted water in the rinsing water tank to enter the circulating water channel of a rinsing machine through overflow; a step 3) of causing the tows to undergo acid dipping and then enter the rinsing machine, spraying the sprayed water out of the spraying nozzle to form atomized water to wash the tows; a step 4) of washing the tows and then causing the tows to enter the rinsing water tank to be rinsed, and causing the advancing direction of the tows to be opposite to the flowing direction of the desalted water in the rinsing water tank. According to the device and method for carbon fiber precursor washing, sodium ions in the tows can be reduced, and quality of carbon fiber precursors is improved.

Description

technical field [0001] The invention relates to the field of carbon fiber production, and more particularly, relates to a carbon fiber precursor washing device and washing method. Background technique [0002] As a high-tech material, carbon fiber has the advantages of high strength, high modulus, low density, high temperature resistance, high electrical conductivity and thermal conductivity, and is widely used in aviation, automobile, cultural and sports fields. Polyacrylonitrile-based carbon fiber precursor is an important raw material for preparing carbon fiber, and the quality of the precursor plays a decisive role in the quality of carbon fiber. [0003] Sodium thiocyanate one-step method to prepare carbon fiber usually uses sodium thiocyanate as solvent, acrylonitrile, second monomer methyl acrylate, third monomer itaconic acid as raw materials, azobisisobutyronitrile as initiator Polymerization reaction, polyacrylonitrile polymerization solution is obtained after sin...

Claims

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Application Information

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IPC IPC(8): D06B21/00D06B1/02D06B3/04D06B23/20D06B23/04D06B23/02D06B23/22
CPCD06B1/02D06B3/04D06B21/00D06B23/023D06B23/04D06B23/20D06B23/22
Inventor 王斐尚文武刘扬宋勇军
Owner 兰州蓝星纤维有限公司
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