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High-efficiency carbon fiber pre-carbonization process and equipment

A pre-carbonization and equipment technology, which is applied in the fields of fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of shortened metal muffle furnace life, affecting the performance and quality of carbon fiber, and furnace perforation, so as to reduce investment in equipment maintenance or repair , reduce the risk of fiber quality decline, and reduce the effect of deposition hazards

Active Publication Date: 2018-06-01
ATA CARBON FIBER TECH GUANGZHOU
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  • Application Information

AI Technical Summary

Problems solved by technology

However, a large amount of high-concentration exhaust gas and tar will be produced during the pre-carbonization process. These exhaust gases and tar will deposit on the metal muffle furnace, which will seriously corrode the metal muffle furnace at high temperature, causing the furnace to perforate and allow air to enter, which seriously affects the carbon fiber. performance and quality
At the same time, the life of the metal muffle furnace is greatly shortened, and it becomes a vulnerable part

Method used

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  • High-efficiency carbon fiber pre-carbonization process and equipment
  • High-efficiency carbon fiber pre-carbonization process and equipment
  • High-efficiency carbon fiber pre-carbonization process and equipment

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Embodiment

[0020] The invention relates to a high-efficiency carbon fiber pre-carbonization process and equipment. Such as figure 1 , Figure 2A and Figure 2B As shown, since the pre-carbonization thermochemical reaction is divided into two stages, the equipment order in which the fiber (4) passes through in turn is: the driving equipment (1), the muffle furnace (2a) of the first reaction stage, the driving equipment (1 ), the muffle furnace (3a) for the second reaction stage, and the drive equipment (1). The driving equipment (1) provides a tension field for the two stages of the pre-carbonization chemical reaction, the muffle furnace (2a) of the first reaction stage provides a temperature field of 300-500 degrees Celsius for the first reaction stage of the pre-carbonization, and the second The muffle furnace (3a) in the reaction stage provides a temperature field of 500-1000 degrees Celsius for the second reaction stage of pre-carbonization. High-concentration tar and waste gas ar...

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Abstract

The invention discloses a high-efficiency carbon fiber pre-carbonization process and equipment. According to the main chemical reaction and engineering characteristics of thermally-stabilized fiber pre-carbonization, the pre-carbonization reaction is completed by two states; each of the stages has different temperature fields and tension fields to better provide pre-carbonization thermo-chemical reaction conditions. Moreover, different Muffle furnace hearths and respective waste discharge systems are designed according to the concentration and the discharge quantity of discharge materials at different pre-carbonization reaction stages as well as the pollution to fibers and the corrosion to a Muffle furnace by the discharge materials, so that the purpose of high-efficiency pre-carbonizationis realized.

Description

technical field [0001] The invention belongs to the field of carbon fiber preparation technology and equipment, and is mainly used for the pre-carbonization (low-temperature carbonization) technology of carbon fibers of various substrates. Background technique [0002] Carbon fiber precursors are prepared into carbon fibers by thermal stabilization (or pre-oxidation), pre-carbonization (or low-temperature carbonization), and high-temperature carbonization. Usually, carbon fiber precursors are first subjected to a thermal stabilization process at 200-300 degrees Celsius to obtain thermally stabilized fibers (or pre-oxidized filaments); and then undergo a pre-carbonization process at 300-1000 degrees Celsius to convert thermally stabilized fibers into graphite-like sheets layer structure; and then undergo a high-temperature carbonization process at 1000-1600 degrees Celsius to remove more other nitrogen, hydrogen, and oxygen elements and become carbon fibers with a carbon cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/12
CPCD01F9/12
Inventor 林刚张永福乔荫春冯军
Owner ATA CARBON FIBER TECH GUANGZHOU
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