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High-temperature carbide furnace capable of producing carbon fibers in large scale

A high-temperature carbonization furnace and carbon fiber technology, which is applied in the chemical characteristics of fibers, textiles and papermaking, etc., can solve the problems of poor airtightness of the furnace body, poor thermal insulation performance of the furnace type, and can not meet the requirements, and achieves long life, high heating temperature and high performance. Safe and reliable effect

Active Publication Date: 2014-05-28
ATA CARBON FIBER TECH GUANGZHOU
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Problems solved by technology

The maximum operating temperature does not exceed 1400°C, the furnace type has poor thermal insulation performance, the furnace body has poor airtightness, and the furnace life is short, which cannot meet the needs of preparing higher modulus carbon fibers

Method used

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  • High-temperature carbide furnace capable of producing carbon fibers in large scale

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Embodiment

[0012] The present invention is a high-temperature carbonization furnace for large-scale production of carbon fibers, such as figure 1 shown. When the furnace is working, the heating element (3) is energized and heated, so that the temperature of the graphite furnace cavity (5) is raised to 1000-1600°C. The carbon fibers are carbonized in 2-7 temperature zones in the graphite furnace cavity (5). The heat preservation system (1) is located between the heating element (3) and the furnace shell (4), and is composed of 200-400mm thick graphite hard felt and other materials. Most of the heat preservation materials are plate-shaped, and the plates are overlapped. The transformer with taps (6) controls and adjusts the graphite heating element (3) due to the progress of oxidation and the aging of the cross-sectional surface, and the voltage change caused by the increase of heating resistance and the increase of graphite resistance increases to maintain the stability of the heating vo...

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Abstract

The invention discloses a high-temperature carbide furnace capable of producing carbon fibers in a large scale with heating temperature of 1000-1600 DEG C. The high-temperature carbide furnace structurally comprises a graphite muffle hearth, wherein the hearth is divided into a uniform temperature region and a heating region, heating devices are arranged on the upper face and the lower face of the hearth, and the heating devices are formed by connecting graphite heating elements and graphite electrodes through screw threads. A large amount of graphite hard felts are adopted in a furnace body as a thermal insulation system, an outer layer of the thermal insulation system is a furnace shell in a steel structure, and a detachable cold water board is stuck out of the furnace shell. According to the invention, unsteady change of voltage of the graphite heating elements caused by larger heating resistance and larger graphite resistance due to oxidation and ageing of a transverse surface can be counteracted through utilizing a transformer provided with a tap.

Description

technical field [0001] The invention belongs to the technical field of high-temperature carbonization heating equipment for large-scale production of carbon fibers, and is particularly suitable for large-scale production of carbon fibers with high performance and high modulus. Background technique [0002] Carbon fiber and carbon fiber products have excellent properties such as light weight, high strength, good thermal stability and dimensional stability, so they are widely used in the fields of spacecraft and aerospace as reinforcement materials for the main structure. [0003] In the carbon fiber production process, high temperature carbonization equipment is extremely critical. The carbonization furnace has become the key equipment in large-scale production lines because of its high working temperature, great influence on the performance of carbon fiber, and high requirements for comprehensive technical level. Due to the late start of carbon fiber high-temperature carbon...

Claims

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Application Information

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