Pre-oxidation device for carbon fiber production

Abstract

The invention discloses a pre-oxidation device for carbon fiber production and belongs to the technical field of carbon fiber production and processing. The pre-oxidation device comprises a pre-oxidation furnace, an air supply system, an exhaust system, driving devices and a temperature detection control system; the pre-oxidation furnace is serially composed of a first pre-oxidation furnace body and a second pre-oxidation furnace body, each of the first pre-oxidation furnace body and the second pre-oxidation furnace body is provided with a plurality of hearths arrayed up and down in parallel, temperature of the hearths in the first pre-oxidation furnace body is gradually increased from bottom to top, and temperature in the second pre-oxidation furnace body 5 is gradually increased from top to bottom; the air supply system and the exhaust system are connected with the hearths of the first pre-oxidation furnace body and the second pre-oxidation furnace body through pipelines, and the driving devices are mounted at two ends of the hearths. The pre-oxidation device has the advantages of reasonable distribution of temperature regions and temperature gradient, temperature uniformity of a heating system and the like, the temperature in the hearths can be precisely controlled to be gradually varied within 100DEG C and 300DEG C, and temperature control precision is ensured not to be lower than + / -0.5DEG C.

Description

technical field [0001] The invention relates to a preoxidation device used for carbon fiber production, belonging to the technical field of carbon fiber production and processing. Background technique [0002] The first step in the production process of carbon fiber carbonization is the pre-oxidation process, the purpose of which is to transform the polyacrylonitrile precursor with linear macromolecular chains into a non-melting and non-combustible heat-resistant trapezoidal structure after high-temperature oxidation treatment, so that it can withstand The subsequent high-temperature carbonization process keeps the fiber state. [0003] The pre-oxidation process has a great influence on the quality and yield of carbon fiber. At present, there are many types of pre-oxidation furnaces at home and abroad, including internal heating pre-oxidation furnaces, external heating pre-oxidation furnaces, hot air circulation furnaces, solid-solid heat transfer furnaces, and pre-oxidatio...

AI Technical Summary

Problems solved by technology

At present, there are many types of pre-oxidation furnaces at home and abroad, including internal heating pre-oxidation furnaces, external heating pre-oxidation furnaces, hot air circulation furnaces, solid-solid heat transfer furnaces, and pre-oxidation furnaces with vulcanized layers. Each pre-oxidation furnace is based on its own Different processes have their own different characteristics, and the existing pre-oxidation equipment generally has phenomena such as poor sealing of the furnace body and uneven isothermal zones.

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