High-performance carbon fiber pre-oxidation furnace

Abstract

The invention discloses a high-performance carbon fiber pre-oxidation furnace which is specially designed for carrying out heat treatment on a high-performance carbon fiber material at a temperature below 350 DEG C. A furnace body is designed into a building block structure and is convenient to assemble and disassemble. For the design of the furnace, the requirements of a preparation process of the high-performance carbon fiber material are fully considered and understood and the key special requirements of the preparation process of the high-performance carbon fiber material are met to the greatest extent. According to the requirements of the preparation process of the material, a circulating hot air heating mode is adopted for the pre-oxidation furnace; for a circulating air traveling mode, air is blown to two ends of the furnace body from the middle of the furnace body; and a plurality of heat treatment cavities are connected in series and in parallel to form a system with a certain temperature gradient. An anticorrosion stainless steel structure is adopted for an inner hearth totally; a full-fiber superlight material is adopted as a heat insulating material to carry out heat insulation; a PLC (Programmable Logic Controller) temperature control module is used for temperature control and has the characteristics of high temperature control accuracy, high temperature stability and the like; and according to the pre-oxidation furnace, in a pre-oxidation process, the problems of low heat treatment efficiency, inaccurate temperature control and unideal temperature uniformity in the heat treatment cavities are solved, protofilament combustion is prevented, sufficient supplementation of the oxygen content in the hearth is realized and waste gas is reasonably discharged. The integral high-performance carbon fiber pre-oxidation furnace has relatively low energy consumption and is durable.

Description

Technical field: [0001] The invention relates to the field of chemical production equipment, in particular to a high-performance carbon fiber pre-oxidation furnace. Background technique: [0002] The pre-oxidation furnace is a heat treatment furnace for oxidizing and heat-treating raw silk to prepare oxidized fibers. A number of guide rollers are arranged outside the pre-oxidation furnace to guide the raw silk. The basic oxidation process of the precursor is as follows: use the oxidized fiber precursor for carbon fiber, such as polyacrylonitrile (PAN)-based continuous fiber, to make it run through the heat treatment chamber along a zigzag path under the guidance of many guide rollers. The raw silk will be gradually pre-oxidized when passing through the heat treatment chamber. In the entire process of preparing high-performance carbon fibers, the pre-oxidation process is a very important and critical step, and it is a bridge connecting the former (raw silk) and the latter (...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a high-performance carbon fiber pre-oxidation furnace to solve the problems of low heat treatment efficiency, inaccurate temperature control, unsatisfactory temperature uniformity in the heat treatment chamber, prevention of raw silk combustion and oxygen content in the furnace during the pre-oxidation process. Sufficient replenishment and reasonable discharge of exhaust gases

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