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Large-tow carbon fiber pre-oxidation furnace and pre-oxidation method

A pre-oxidation furnace, carbon fiber technology, applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of difficult to control tension, uneven tension in different areas, etc., to achieve the effect of simple implementation, simple and easy control of tension, and low energy consumption

Pending Publication Date: 2022-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] One of the technical problems to be solved by the present invention is the tension control method in the pre-oxidation process of the existing large-tow carbon fiber, which mainly solves the problem that the tension is difficult

Method used

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  • Large-tow carbon fiber pre-oxidation furnace and pre-oxidation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The guide roller system of the oxidation furnace is integrated into the heating system. The large tow strands enter the oxidation furnace through the driving device, and go through the guide roller in an S-shaped reciprocating manner in the furnace. The driving device is on the left and right sides of the oxidation furnace. A five-roller or seven-roller is used, the upper wrap angle of the driving roller is 120°, the guide roller is set in the air-sealing area inside the furnace, and is made of high-temperature resistant stainless steel. The air-sealing medium around the guide roller is air, and the air temperature is lower than The process temperature in the furnace temperature zone is 10°C, and the wrap angle of the guide roller is 180°. Each group of drive units and guide units is equipped with a tension sensor, and the roller speed is automatically adjusted by the tension on the fiber. The speed of the inlet and outlet drive devices in the same temperature zone is man...

Embodiment 2

[0034] The guide roller system of the oxidation furnace is integrated into the heating system. The large tow strands enter the oxidation furnace through the driving device, and go through the guide roller in an S-shaped reciprocating manner in the furnace. The driving device is on the left and right sides of the oxidation furnace. A five-roller or seven-roller is used, the upper wrap angle of the driving roller is 135°, the guide roller is set in the air-sealing area inside the furnace, and is made of high-temperature resistant stainless steel. The air-sealing medium around the guide roller is air, and the air temperature is lower than where the oxidation The process temperature in the furnace temperature zone is 10°C, and the wrap angle of the guide roller is 180°. Each group of drive units and guide units is equipped with a tension sensor, and the roller speed is automatically adjusted by the tension on the fiber. The speed of the inlet and outlet drive devices in the same tem...

Embodiment 3

[0036] The guide roller system of the oxidation furnace is integrated into the heating system. The large tow strands enter the oxidation furnace through the driving device, and go through the guide roller in an S-shaped reciprocating manner in the furnace. The driving device is on the left and right sides of the oxidation furnace. A five-roller or seven-roller is used, the upper wrap angle of the driving roller is 135°, the guide roller is set in the air-sealing area inside the furnace, and is made of high-temperature resistant stainless steel. The air-sealing medium around the guide roller is air, and the air temperature is lower than where the oxidation The process temperature in the furnace temperature zone is 20°C, and the wrap angle of the guide roller is 180°. Each group of drive units and guide units is equipped with a tension sensor, and the roller speed is automatically adjusted by the tension on the fiber. The speed of the inlet and outlet drive devices in the same tem...

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Abstract

The invention relates to a large-tow carbon fiber pre-oxidation furnace and a pre-oxidation method, and mainly solves the technical problems that in the existing large-tow carbon fiber pre-oxidation process, the tension is difficult to control, and the tension in different areas of the same temperature area is not uniform. The carbon fiber pre-oxidation furnace comprises a pre-oxidation furnace box body, a hearth and guide rollers, wherein the guide rollers are arranged in the hearth and are respectively positioned at two ends of the hearth; the pre-oxidation furnace box body is provided with an air extractor and an air inlet; the technical scheme is characterized in that the guide roller area is an air seal area, the problem is well solved, and the air seal device can be applied to the field of industrial production of large-tow carbon fibers.

Description

technical field [0001] The invention relates to a large tow carbon fiber preoxidation furnace and a preoxidation method, which can effectively solve the problem of tension control of the large tow carbon fiber and improve production efficiency. [0002] technical background [0003] With the continuous progress and development of technology, in recent years, polyacrylonitrile-based carbon fibers have gradually developed into two types of large tow and small tow. These two types of carbon fiber materials are comparable in performance and cost. The preparation of small tow carbon fibers has high requirements and excellent performance, and has always been the key development direction of carbon fiber materials, while large tow carbon fibers have lower production and subsequent application costs. , generally used in civilian products, so the use is more extensive. For the above two types of carbon fiber materials, there are certain differences in the technical paths chosen by Ja...

Claims

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Application Information

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IPC IPC(8): D01F9/12D01F9/32
CPCD01F9/12D01F9/32
Inventor 昌志龙沈志刚陈辉
Owner CHINA PETROLEUM & CHEM CORP