CN201817597U - Low-temperature carbonization furnace for producing continuous carbon fibers - Google Patents
Low-temperature carbonization furnace for producing continuous carbon fibers Download PDFInfo
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- CN201817597U CN201817597U CN2010205335653U CN201020533565U CN201817597U CN 201817597 U CN201817597 U CN 201817597U CN 2010205335653 U CN2010205335653 U CN 2010205335653U CN 201020533565 U CN201020533565 U CN 201020533565U CN 201817597 U CN201817597 U CN 201817597U
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- burner hearth
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- hearth
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Abstract
The utility model belongs to a low-temperature carbonization furnace for producing continuous carbon fibers. The carbonization furnace comprises a furnace body, a hearth, an insulating layer, a fireproof layer, a heating element and an exhaust pipe, wherein the hearth is arranged in the furnace body; the insulating layer, the fireproof layer and the heating layer are sequentially arranged between the furnace body and the hearth; the exhaust pipe is arranged on the furnace body and communicates the hearth with the atmosphere; the upper wall of the hearth close to a tow inlet and the horizontal plane forms an included angle of 2 to 30 degrees; and the height of the upper wall of the hearth linearly increases in the moving direction of fiber tows. The low-temperature carbonization furnace provided by the utility model solves the technical problem that waste gas generated during carbonization of carbon fibers can not be discharged smoothly to cause accumulation due to unreasonable structure of the hearth of the conventional carbonization furnace, and ensures that preoxidized fibers can be carbonized stably and continually, thus the production efficiency of carbon fibers is improved.
Description
Technical field
The utility model belongs to the new material production field, relates to a kind of carbon fiber production equipment, specifically a kind of low temperature carbonization furnace that is used to produce continuous carbon fibre.
Background technology
Carbon fiber is a kind of new carbon, has high specific strength, high ratio modulus, high temperature resistant, corrosion-resistant, creep resistant, low-thermal-expansion, high conduction and a series of excellent properties such as heat conduction, self-lubricating; And as fiber also have flexibility and can compile, weaving property, be widely used in civilian industries such as leading-edge fields such as space flight and aviation, national defense and military and senior Leisure Sport articles for use, medicine equipment, become one of main enhancing body of advanced composite material, be described as the most vital new material in 21 century.
In polyacrylonitrile (PAN) base carbon fibre production process, usually the PAN precursor is carried out pre-oxidation treatment in 200-300 ℃ of air atmosphere and make pre-oxidized fibers, then pre-oxidized fibers is successively carried out low-temperature carbonization and high temperature cabonization respectively and handle and make phosphorus content in the inert atmosphere of 300-900 ℃ and 1000-1800 ℃, then above-mentioned carbon fiber is carried out graphitization processing and makes high modulus carbon fiber (also claiming graphite fibre) in 2000-3000 ℃ of inert atmosphere at the carbon fiber more than 90%.Wherein, in above-mentioned carbonisation, pre-oxidized fibers is converted into the carbon fiber with random graphits structure by heat-resisting trapezium structure by reactions such as crosslinked, polycondensations; Being accompanied by said structure transforms, there is the quality (with respect to pre-oxidized fibers) of 30-40% to overflow approximately, and is discharged to the outer exhaust treatment system of carbide furnace by exhaust outlet with the inert gas in the carbide furnace with the form pyrolysis of carbonization waste gas and small molecule by-product.As shown in Figure 1, structural representation for original low temperature carbonization furnace, wherein, (a) for the carbonization waste gas that produces in the carbide furnace course of work and flow to schematic diagram, (b) be that attachment such as tar and shows the state that drops under these attachments on the carbon fiber at inboard, top and the adhesion condition on every side thereof of the tow import and the outlet of carbide furnace in the carbonisation; As can be seen from Figure 1, in carbon fiber production process, because burner hearth 2 structural designs of carbide furnace are unreasonable, it is not smooth to cause carbonization waste gas 14 to be discharged, and partially carbonized waste gas 14 is condensed into tar 15 attached to inboard, the top of the tow import 11 of carbide furnace and tow outlet 12 and locate on every side in stove; Tar 15 following of tar to a certain degree will occur in stove inwall deposition, pollute fibre bundle 10, gently then hardening, embrittlement, and heavy then fracture of wire, thus influence the serialization production of carbon fiber, the production efficiency of reduction carbon fiber.
Summary of the invention
Technical problem not smooth, that waste gas is piled up that the waste gas of the generation when causing carbon fibre carbonizing for the chamber structure that solves existing carbide furnace is unreasonable is discharged, the utility model provides a kind of low temperature carbonization furnace that is used to produce continuous carbon fibre.
Technical solution of the present utility model is:
A kind of low temperature carbonization furnace that is used to produce continuous carbon fibre, comprise body of heater 1, be arranged on the heat-insulation layer that sets gradually 4, flame retardant coating 3 and the heating element heater 5 between burner hearth 2, body of heater 1 and the burner hearth 2 in the body of heater 1 and be arranged on the blast pipe 6 that connects burner hearth and atmosphere on the body of heater, its special character is: described burner hearth upper wall surface near synnema inlet 11 becomes the height of 2～30 ° of angles and this place's burner hearth upper wall surface to increase along fibre bundle 10 traffic directions are linear with horizontal plane.
Above-mentioned burner hearth upper wall surface near synnema inlet 11 becomes 5～20 ° of angles with horizontal plane.
The upper wall surface of the burner hearth of above-mentioned close synnema outlet 12 becomes the height of 2～30 ° of angles and this place's burner hearth upper wall surface to reduce along fibre bundle 10 traffic direction linearities with horizontal plane.
The upper wall surface of the burner hearth of above-mentioned close synnema outlet 12 becomes 5～20 ° of angles with horizontal plane.
The beneficial effect that the utility model had:
The left side upper wall surface of the burner hearth of the low temperature carbonization furnace of the utility model by will being used to produce continuous carbon fibre and right side upper wall surface are designed to become with horizontal plane 2～30 ° of angles, the materials such as waste gas that pre-oxidized fibers can be produced in carbonisation in time discharge out of the furnace, avoid owing to waste gas for a long time in burner hearth the low temperature place stop and to be condensed into tar, and then prevent materials such as tar adhere at inboard wall of burner hearth, following, pollute fiber, cause fibre property decline, tow fracture.Guarantee the stabilisation and the serialization of pre-oxidized fibers carbonisation, improved the production efficiency of carbon fiber.
Description of drawings
Fig. 1 is existing low temperature carbonization furnace structural representation; Wherein a is the process schematic diagram that waste gas is piled up, and b is the structural representation that tar adheres at inboard wall of burner hearth;
Fig. 2 is a structural representation of the present utility model;
Wherein: 1-body of heater, 2-burner hearth, 3-flame retardant coating, 4-heat-insulation layer, 5-heating element heater, 6-blast pipe, 7-stove outer covering, 8-sealing device, 10-fibre bundle, the import of 11-tow, the outlet of 12-tow, 13-inert gas import, 14-waste gas, 15-tar.
The specific embodiment
The carbide furnace that the utility model is used to produce continuous carbon fibre comprises that burner hearth 2, flame retardant coating 3, heat-insulation layer 4, heating element heater 5, blast pipe 6, stove outer covering 7, carbide furnace two ends are provided with sealing device 8 as shown in Figure 2.Wherein, burner hearth 2 is a rectangular cross section, adopts high temperature resistant, corrosion resistance material to make; Between stove outer covering 7 and burner hearth 2, be provided with heating element heater 5, flame retardant coating 3 and heat-insulation layer 4 from the inside to the outside; Heating element heater 5 is used in fibre bundle 10 traffic directions formation thermograde from low to high; Also be provided with inert gas import 13 on the carbide furnace body of heater 1, sealing device 8 is connected with tow outlet 12 with the tow import 11 of carbide furnace body of heater 1 by flange, securing member etc., be used to guarantee be in the stove pressure-fired inert atmosphere, suppress the outer indoor air of stove and infiltrate in the stove, prevent that simultaneously the carbonization waste gas in the stove is disposed to outside the stove through import 11 of carbide furnace tow and tow outlet 12; Blast pipe 6 is arranged on the top of burner hearth 2, and is upward through flame retardant coating 3, heat-insulation layer 4, stove outer covering 7, extends to carbide furnace body of heater 1 outer certain distance.
The place that the burner hearth 2 of carbide furnace body of heater 1 is finished its low-temperature carbonization technology for fibre bundle 10 mainly is made up of fibre bundle inducer I, introduction segment II, main paragraph III, five parts such as derivation section IV, outlet section V.Wherein, the burner hearth upper wall surface and the horizontal plane of fibre bundle 10 introduction segments have certain included angle α, general α gets 2～30 °, and best 5～20 °, and the burner hearth upper wall surface of fibre bundle 10 introduction segments increases along fibre bundle 10 traffic directions are linear apart from the distance of carbon fiber 10 on the plane; The burner hearth upper wall surface of fibre bundle 10 main paragraphs is the level of state, and its upper wall surface height is consistent with the burner hearth upper wall surface height of fibre bundle introduction segment end; Burner hearth upper wall surface and horizontal plane that fibre bundle is derived section have certain included angle β, and general β gets 2～30 °, and best 5～20 °, and the burner hearth upper wall surface of fibre bundle derivation section reduces along fibre bundle 10 traffic direction linearities; Fibre bundle introduction segment below is provided with inert gas induction part 13, be used in stove, feeding a certain amount of inert gas, take away the waste gas 14 that pre-oxidized fibers 10 is produced when guaranteeing to be the pressure-fired inert atmosphere in the stove in carbonisation, finally enter exhaust treatment system outside the stove through above-mentioned blast pipe 6; The airintake direction of inert gas should be along the traffic direction of fibre bundle in the stove 10, and air inflow evenly distributes better in burner hearth 2 cross sections.
When adopting carbide furnace of the present utility model to work, the tow import 11 of fibre bundle 10 through sealing device 8, carbide furnace imported in the burner hearth 2, through the tow of carbide furnace outlet 12, sealing device 8 carbon fiber is derived carbide furnace then, finish the low-temperature carbonization of pre-oxidized fibers and handle.In above-mentioned processing procedure, to produce waste gas 14, because the area of space of burner hearth fibre bundle introduction segment II and derivation section IV is narrow, waste gas is difficult for stopping, for example, under the effect of inert gas driving force, move to burner hearth fibre bundle outlet section V direction, finally enter exhaust treatment system outside the stove from blast pipe 6 along the gas passage.
Adopt specific embodiment that the utility model is done more detailed explanation below.
As shown in Figure 2, in low temperature carbonization furnace of the present utility model PAN base preoxidized fiber 10 is carried out low-temperature carbonization and handle, the fiber speed of service is 60m/h.Burner hearth 2 total length L of carbide furnace are 10m, and wherein, the length of fibre bundle inducer I, introduction segment II, main paragraph III, derivation section IV and outlet section V is respectively 0.5m (L
I), 0.6m (L
II), 7.8m (L
III), 0.6m (L
IV), 0.5m (L
V), the length l of blast pipe 6 right side wall identity distance fibre bundle main paragraph III ends is 0.1m; Burner hearth 2 cross section overall height H are 0.18m, wherein, and fibre bundle inducer I depth of section H
IThe height that moves place plane separation burner hearth 2 upper wall surfaces for fibre bundle in 0.08m, the fibre bundle introduction segment II cross section 10 increases to 0.14m (H by the 0.04m linearity
II), fibre bundle 10 operation planes, place to the height of burner hearth 2 upper wall surfaces is that 0.14m, fibre bundle are derived the height of fibre bundle 10 operation place plane separation burner hearth 2 upper wall surfaces in the section IV cross section by 0.14m (H in the main paragraph III cross section
III) linearity is decreased to 0.04m, fibre bundle outlet section V depth of section H
VBe 0.08m, the angle α on the burner hearth upper wall surface of fibre bundle introduction segment II and plane, carbon fiber 10 place is 9.5 °, fibre bundle derives the burner hearth upper wall surface of section IV and the angle β on plane, fibre bundle 10 place is 9.5 °; Burner hearth 2 cross section overall width B are 0.6m; Heating element heater 5 in the low temperature carbonization furnace is made up of multistage, but the traffic direction of the fibre bundle 10 in the burner hearth 2 formation thermograde from low to high, and its temperature range is 300～900 ℃, and can set 6 warm areas at most.
Under these conditions, low temperature carbonization furnace of the present utility model moves two months continuously, does not find following of material, pollution fiber phenomenons such as tar in the burner hearth 2; Burner hearth 2 out of service, as to check low temperature carbonization furnace 1 found that at fibre bundle introduction segment, derivation section etc. and locates that extremely slight attachment deposition is only arranged.
Claims (4)
1. low temperature carbonization furnace that is used to produce continuous carbon fibre, comprise body of heater (1), be arranged on the heat-insulation layer that sets gradually (4), flame retardant coating (3) and the heating element heater (5) between burner hearth (2), body of heater (1) and the burner hearth (2) in the body of heater (1) and be arranged on the blast pipe (6) that connects burner hearth and atmosphere on the body of heater, it is characterized in that: described burner hearth upper wall surface near synnema inlet (11) becomes the height of 2～30 ° of angles and this place's burner hearth upper wall surface to increase along fibre bundle (10) traffic direction is linear with horizontal plane.
2. the low temperature carbonization furnace that is used to produce continuous carbon fibre according to claim 1 is characterized in that: described burner hearth upper wall surface near synnema inlet (11) becomes 5～20 ° of angles with horizontal plane.
3. the low temperature carbonization furnace that is used to produce continuous carbon fibre according to claim 1 and 2 is characterized in that: the upper wall surface of the burner hearth of described close synnema outlet (12) becomes the height of 2～30 ° of angles and this place's burner hearth upper wall surface to reduce along fibre bundle (10) traffic direction linearity with horizontal plane.
4. the low temperature carbonization furnace that is used to produce continuous carbon fibre according to claim 2 is characterized in that: the upper wall surface of the burner hearth of described close synnema outlet (12) becomes 5～20 ° of angles with horizontal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205335653U CN201817597U (en) | 2010-09-17 | 2010-09-17 | Low-temperature carbonization furnace for producing continuous carbon fibers |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205335653U CN201817597U (en) | 2010-09-17 | 2010-09-17 | Low-temperature carbonization furnace for producing continuous carbon fibers |
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| CN201817597U true CN201817597U (en) | 2011-05-04 |
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| CN2010205335653U Expired - Lifetime CN201817597U (en) | 2010-09-17 | 2010-09-17 | Low-temperature carbonization furnace for producing continuous carbon fibers |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956248A (en) * | 2010-09-17 | 2011-01-26 | 西安航科等离子体科技有限公司 | Low-temperature carbide furnace for producing continuous carbon fibers |
| CN101956250A (en) * | 2010-09-17 | 2011-01-26 | 西安航科等离子体科技有限公司 | Low-temperature carbide furnace for producing continuous carbon fiber |
| CN104611785A (en) * | 2013-11-05 | 2015-05-13 | 中国科学院宁波材料技术与工程研究所 | Low-temperature carbonization furnace |
| CN109652870A (en) * | 2018-12-28 | 2019-04-19 | 安徽天富环保科技材料有限公司 | A kind of pre- oxygen equipment of activated carbon fibre low temperature |
-
2010
- 2010-09-17 CN CN2010205335653U patent/CN201817597U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956248A (en) * | 2010-09-17 | 2011-01-26 | 西安航科等离子体科技有限公司 | Low-temperature carbide furnace for producing continuous carbon fibers |
| CN101956250A (en) * | 2010-09-17 | 2011-01-26 | 西安航科等离子体科技有限公司 | Low-temperature carbide furnace for producing continuous carbon fiber |
| CN101956250B (en) * | 2010-09-17 | 2012-06-20 | 西安航科等离子体科技有限公司 | Low-temperature carbide furnace for producing continuous carbon fiber |
| CN104611785A (en) * | 2013-11-05 | 2015-05-13 | 中国科学院宁波材料技术与工程研究所 | Low-temperature carbonization furnace |
| CN104611785B (en) * | 2013-11-05 | 2016-08-31 | 中国科学院宁波材料技术与工程研究所 | Low-temperature carbonization furnace |
| CN109652870A (en) * | 2018-12-28 | 2019-04-19 | 安徽天富环保科技材料有限公司 | A kind of pre- oxygen equipment of activated carbon fibre low temperature |
| CN109652870B (en) * | 2018-12-28 | 2021-05-18 | 安徽天富环保科技材料有限公司 | Activated carbon fiber low-temperature pre-oxidation equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: JIANGSU HANGKE COMPOSITE MATERIALS TECHNOLOGY CO., LTD. Assignor: Xi'an Hangke Plasma Science and Technology Co., Ltd. Contract record no.: 2012320000398 Denomination of utility model: Low-temperature carbide furnace for producing continuous carbon fiber Granted publication date: 20110504 License type: Exclusive License Record date: 20120405 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110504 Effective date of abandoning: 20120620 |