Pre-oxidizing furnace

A pre-oxidation furnace and furnace body technology, applied in the field of oxidation furnace, can solve the problems affecting fiber pre-oxidation, heat accumulation, dead zone without wind, etc., and achieve good pre-oxidation effect

Active Publication Date: 2019-11-22
ZHEJIANG JINGGONG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The air outlets of the existing distributors are all set at the end of the wire-traveling channel, so that the airflow direction of the hot air blown out by the distributor is parallel to the direction of the fiber, ensuring uniform temperature and stable wind speed in the wire-traveling channel; however, adjacent The tow channels between the distributors tend to form dead zones without wind, causing heat build-up, which affects the pre-oxidation of the fibers in the tow channels

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as Figure 1-9 As shown, the pre-oxidation furnace of this embodiment includes a furnace body 1, an air outlet device 2 and a return air device 3 installed in the furnace body, and guide rollers 4 installed corresponding to the left and right ends of the furnace body 1 .

[0049] Specifically, as figure 1 and 2 As shown, the furnace body 1 is surrounded by two vertical side walls 1a opposite in the length direction, two vertical end walls opposite in the width direction, a top wall 1b, and a bottom wall 1c. Hollow cuboid structure; the end walls at the left and right ends of the furnace body have seven sets of through-holes arranged at vertical intervals; the furnace body 1 has a wire-running channel 10 distributed along its length, that is, the hollow structural space in the furnace body, As a space for fiber pre-oxidation treatment.

[0050] Additionally, if figure 2As shown, the furnace body 1 also has two mutually independent return air ducts 11, and the t...

Embodiment 2

[0057] The difference between the preoxidation furnace of the present embodiment and embodiment one is:

[0058] Such as Figure 10 As shown, a first mesh plate A corresponding to the first air return port and a second mesh plate B corresponding to the second air return port are installed in the furnace body to ensure the uniformity and stability of the return air.

[0059] The long-term movement of the pre-oxidation furnace will easily block the first mesh plate A and the second mesh plate B; therefore, it is necessary to clean the first mesh plate and the second mesh plate online, specifically, as Figure 11 and 12 As shown, the furnace body of the present embodiment has a draw-in port C corresponding to the first mesh plate and the second mesh plate one by one, and the draw-in port C is equipped with a thermal insulation sealing plug D. By pulling out the insulation sealing plug, the first mesh plate or the second mesh plate can be pulled out to realize online cleaning, w...

Embodiment 3

[0066] The difference between the preoxidation furnace of the present embodiment and embodiment one is:

[0067] The distributor of this embodiment is the combination of the first box and the second box of the distributor of the first embodiment without spacing, that is, the first box and the second box are integrated to improve the installation efficiency of the distributor.

[0068] The pre-oxidation furnace of this embodiment is used to manufacture carbon fibers, and the effect of pre-oxidation treatment is good.

[0069] Other structures can refer to Embodiment 1.

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Abstract

The invention relates to a pre-oxidizing furnace. The pre-oxidizing furnace comprises a furnace body, an air outlet device and an air return device, wherein the furnace body is internally provided with silking channels distributed in the length direction of the furnace body; the furnace body is internally provided with two mutually independent air return channels; the air outlet device comprises multiple distributors arranged at vertical intervals, and the vertical intervals between the adjacent distributors form tow channels; the air return device comprises multiple air return boxes arrangedat vertical intervals; the two ends of each distributor are provided with first air outlet ports communicated with the corresponding tow channels respectively, and the air outlet directions of the first air outlet ports are parallel to the silking direction; the two sides of each distributor are provided with second air outlet ports communicated with the corresponding silking channels respectively, and the air outlet directions of the second air outlet ports face the corresponding tow channels. According to the pre-oxidizing furnace, through the creative design of the distributors, the defectthat air-free dead zones are easily formed in the tow channels between the adjacent distributors is overcome; in the process of producing carbon fibers, the pre-oxidation effect of the fibers is good.

Description

technical field [0001] The invention belongs to the technical field of oxidation furnaces, and in particular relates to a pre-oxidation furnace for oxidizing fibers. Background technique [0002] In the process of carbon fiber production, the pre-oxidation of the precursor plays a role of connecting the past and the future, and the pre-oxidation process of the precursor directly affects the yield and performance of carbon fiber. The purpose of the pre-oxidation process is to convert the thermoplastic PAN linear macromolecular chain into a non-plastic heat-resistant trapezoidal structure, making it infusible and non-combustible at high carbonization temperatures, maintaining the fiber shape, and thermodynamically in a stable state, and finally transforming into a turbostratic graphite structure. carbon fiber. According to the requirements of the pre-oxidation process, the pre-oxidation furnace came into being. [0003] Existing pre-oxidation furnaces generally include: [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/32
CPCD01F9/32Y02P70/62
Inventor 傅建根金振峰卫国军王永法韩剑飞朱吉元赵淼江
Owner ZHEJIANG JINGGONG SCI & TECH
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