Microwave heating preparation device for pre-oxidized fiber

A technology of microwave heating and pre-oxygenation, which is used in textiles and papermaking, fiber chemical characteristics, etc., can solve the problems of low dielectric constant, closed equipment, large energy consumption, etc., and achieves improved bulk density, stable wave absorption, and novel methods. Effect

Inactive Publication Date: 2018-05-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the low dielectric constant of the precursor and the thin fiber diameter, it is difficult to efficiently absorb microwaves, so the utilization rate of microwave energy is too low, and the radial structure of the fibers is difficult to effectively control
The current microwave heating equipmen

Method used

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  • Microwave heating preparation device for pre-oxidized fiber
  • Microwave heating preparation device for pre-oxidized fiber

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] like Figures 1 to 2 As shown, the device for preparing pre-oxygen wire by microwave heating includes microwave oven 2, carrier tube 5 and wave-absorbing coating 6, the interior of microwave oven 2 is provided with horizontal carrier tube 5, and the inner surface of carrier tube 5 is sprayed with wave-absorbing coating 6 , the carrier tube 5 is made of mullite (3Al 2 O 3 • 2SiO 2 , diameter 100mm, thickness 20mm) no absorbing material, absorbing coating 6 is ferrite, thickness 1mm.

[0019] It also includes a first protective cover 3, asbestos 4, a wire outlet 7, a first rolling shaft 8, a second rolling shaft 9, a wire inlet 10 and a second protective cover 12, and the outer surface of the carrier tube 5 is provided with asbestos 4. A second protective cover 12 and a first protective cover 3 are respectively provided on the contact surface of the carrier tube 5 and the microwave oven 2, and the second protective cover 12 and the first protective ...

Example Embodiment

[0021] Example 2

[0022] like Figures 1 to 2 As shown, the device for preparing pre-oxygen wire by microwave heating includes microwave oven 2, carrier tube 5 and wave-absorbing coating 6, the interior of microwave oven 2 is provided with horizontal carrier tube 5, and the inner surface of carrier tube 5 is sprayed with wave-absorbing coating 6 , the carrier tube 5 is made of mullite (3Al 2 O 3 • 2SiO 2 , diameter 100mm, thickness 20mm) without absorbing material, absorbing coating 6 is silicon carbide absorbing material, thickness 2mm.

[0023] It also includes a first protective cover 3, asbestos 4, a wire outlet 7, a first rolling shaft 8, a second rolling shaft 9, a wire inlet 10 and a second protective cover 12, and the outer surface of the carrier tube 5 is provided with asbestos 4. A second protective cover 12 and a first protective cover 3 are respectively provided on the contact surface of the carrier tube 5 and the microwave oven 2, and the second protective co...

Example Embodiment

[0025] Example 3

[0026] like Figures 1 to 2 As shown, the device for preparing pre-oxygen wire by microwave heating includes microwave oven 2, carrier tube 5 and wave-absorbing coating 6, the interior of microwave oven 2 is provided with horizontal carrier tube 5, and the inner surface of carrier tube 5 is sprayed with wave-absorbing coating 6 , the carrier tube 5 is made of corundum (Al 2 O 3 , diameter 100mm, thickness 20mm) without absorbing material, absorbing coating 6 is ferrite absorbing material, thickness 3mm.

[0027] It also includes a first protective cover 3, asbestos 4, a wire outlet 7, a first rolling shaft 8, a second rolling shaft 9, a wire inlet 10 and a second protective cover 12, and the outer surface of the carrier tube 5 is provided with asbestos 4. A second protective cover 12 and a first protective cover 3 are respectively provided on the contact surface of the carrier tube 5 and the microwave oven 2, and the second protective cover 12 and the fir...

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Abstract

The invention relates to a microwave heating preparation device for a pre-oxidized fiber and belongs to the technical field of microwave heating. The microwave heating preparation device comprises a microwave oven, a carrier tube and a wave-absorbing coating, wherein the transversely placed carrier tube is arranged in the microwave oven; the inner surface of the carrier tube is coated with the wave-absorbing coating; the carrier tube is made of a mullite or corundum non-wave-absorbing material; and the wave absorption coating is made of a ferrite or silicon carbide wave-absorbing material. Themicrowave heating preparation device is novel in method and clear in structure. As the non-wave-absorbing material has very strong microwave permeability, energy released by microwaves is more uniform; the wave-absorbing coating can dilute microwaves, so that the material can absorb waves more stably; the carrier tube is coated with asbestos, so that energy released by the microwaves can be stored; through the above treatment, a 'skin core' structure of the pre-oxidized fiber is eliminated, the pre-oxidized fiber is more uniform in the radial direction, the bulk density is improved, and a foundation is laid for acquiring a high-performance carbon fiber.

Description

technical field [0001] The invention relates to a device for preparing pre-oxygen wire by microwave heating, belonging to the technical field of microwave heating technology. Background technique [0002] The pre-oxidation process of the raw silk is carried out between 180 and 280 ℃, and it is mainly realized by traditional heating methods such as muffle furnace. The traditional heating method is to heat from the surface to the inside through radiation, convection and conduction. The pre-oxidation process is a double diffusion process. Oxygen diffuses from the surface to the inside of the fiber, and the internal non-carbon small molecule gas products diffuse outward. With the progress of the pre-oxidation reaction, the molecular chain of the fiber surface first forms a dense trapezoidal structure, which hinders the diffusion of oxygen to the core, and makes the fiber form a cyclized core with a low degree of cross-linking. The pre-oxidation reaction proceeds gradually from...

Claims

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Application Information

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IPC IPC(8): D01F9/12
CPCD01F9/12
Inventor 刘建华张程彭金辉郭胜惠张利波许磊
Owner KUNMING UNIV OF SCI & TECH
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