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Method and device for treating waste gas in production of polyacrylonitrile-based carbon fiber precursor

A technology of polyacrylonitrile-based carbon fiber and exhaust gas treatment device, which is applied in the direction of separation methods, chemical instruments and methods, and separation of dispersed particles, achieving the effects of reasonable design, high application value, and convenient operation

Inactive Publication Date: 2016-10-26
ZHONGFU SHENYING CARBON FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the existing waste gas treatment methods in the production of polyacrylonitrile carbon fiber precursors, there is no general-purpose waste gas treatment method and device

Method used

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  • Method and device for treating waste gas in production of polyacrylonitrile-based carbon fiber precursor
  • Method and device for treating waste gas in production of polyacrylonitrile-based carbon fiber precursor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The waste gas treatment device in the production of polyacrylonitrile-based carbon fiber precursor provided by the present invention includes a waste gas collection port 1, a fan 2, a centrifugal pump 3, an atomizing spray device 4, countercurrent absorption towers 51, 52, and an absorption liquid storage tank 6. Packed absorption tower 7, liquid level control pneumatic valve 9, packing layer 8 and exhaust gas content monitor 10; exhaust gas enters from exhaust gas collection port 1, and hydrogen peroxide aqueous solution with a mass concentration of 10% is used as the absorption liquid. The feed mass ratio is 95-105:1, and enters the countercurrent absorption tower 52 from the air inlet pipe at the top of the countercurrent absorption tower 52 through the fan 2, and is absorbed by the absorption liquid at the bottom of the tower; the inlet pipe is located at the liquid surface of the countercurrent absorption tower 51 and 52 At 600-700mm below, the residual waste gas is...

Embodiment 2

[0028] Changing the adsorbent to an aqueous peracetic acid solution with a mass concentration of 8%, the filler layer being activated carbon nanotubes, and the remaining parts are the same as in Example 1. After testing, under this method, the total content of exhaust gas in the exhaust gas is less than or equal to 10ppm, which meets the exhaust gas emission standards and environmental assessment requirements.

Embodiment 3

[0030] Changing the adsorbent is a sodium percarbonate aqueous solution with a mass concentration of 5%, the filler layer is a mixture of activated carbon fiber balls and activated carbon nanotubes, and the remaining parts are the same as in Example 1. After testing, under this method, the total content of exhaust gas in the exhaust gas is less than or equal to 10ppm, which meets the exhaust gas emission standards and environmental assessment requirements.

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Abstract

The invention relates to the technical field of waste gas treatment in macromolecule chemical fiber industry and specifically relates to a method and a device for treating waste gas in production of polyacrylonitrile-based carbon fiber precursor. The method comprises the following steps of: bubbling in reverse flow absorbing towers; spraying and absorbing; and absorbing filling. The device comprises a waste gas collecting port (1), a fan (2), a centrifugal conveying pump (3), an atomizing spraying device (4), reverse flow absorbing towers (51, 52), an absorbing liquid storage tank (6), a filling absorbing tower (7), a liquid level control pneumatic valve (9), a filling layer (8) and a waste gas content monitor (10). The method for treating the waste gas provided by the invention is fit for the waste gas in the production of polyacrylonitrile-based carbon fiber precursor; multi-level reverse flow type absorption is applied to the absorbing process; in each absorbing tower, the pressure of the waste gas is smartly utilized and the absorbing method combining bubbling with spraying is adopted, so that the waste gas absorbing efficiency and the waste gas treating efficiency are efficiently increased and the comprehensive treatment for the waste gas is realized.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment in the polymer chemical fiber industry, in particular to a method and device for treating waste gas in the production of polyacrylonitrile-based carbon fiber precursors. Background technique [0002] In the production process of polyacrylonitrile-based carbon fiber precursors, there are many waste gas emission points, including: polymerization of acrylonitrile ingredients, reaction process waste gas discharge, recovery solvent waste gas discharge, spinning machine, water washing, water pulling during the spinning process Volatile exhaust gas emission during the process, volatile exhaust gas emission during component cleaning process, etc. There are many components in these exhaust gases, and the components are complex. There are ingredients such as acrylonitrile and its monomers, ingredients and solvents (such as: dimethyl sulfoxide, sodium thiocyanate, nitric acid, etc.), and solvents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/18B01D53/04B01D53/78B01D53/72
CPCB01D53/1406B01D53/04B01D53/1487B01D53/18B01D53/72B01D53/78B01D2251/106B01D2253/102
Inventor 陈秋飞刘栋常维平王磊庄惠祥
Owner ZHONGFU SHENYING CARBON FIBER