CN2251122Y - External heating type furnace for preliminary heat treatment in oxidizing - Google Patents
External heating type furnace for preliminary heat treatment in oxidizing Download PDFInfo
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- CN2251122Y CN2251122Y CN 95226608 CN95226608U CN2251122Y CN 2251122 Y CN2251122 Y CN 2251122Y CN 95226608 CN95226608 CN 95226608 CN 95226608 U CN95226608 U CN 95226608U CN 2251122 Y CN2251122 Y CN 2251122Y
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Abstract
The utility model relates to an external heating type pre-oxidization furnace. The utility model has the vertical and horizontal structure. The interior of the furnace is provided with two to six furnace hearths (8) which are arranged in layer. The upper part and the lower part of the furnace hearth are provided with slide ways (13). A separated frame style heater (7) is provided with an upper heating surface and a lower heating surface is loaded in or dismounted along the slide ways. Each furnace hearth is respectively connected with a hot air furnace. The both sides of the furnace hearth are provided with hot air flow distribution pipes (12) to delivery air. The top of the furnace is provided with an air preheating pipe (6), a waste gas exhaust opening (4) and an air blowing inlet (14). Fiber operates in the wire walking narrow slits (3) of the furnace hearth. The utility model adopts the separated frame style heater, and then the maintenance and the replacement are convenient. The waste gas exhaust opening and the air inlet of the furnace body have obvious energy-saving and consumption-reduction effects through heat exchange.
Description
The utility model belongs to the pre-oxidation device in the carbon fiber production technology.
One of primary raw material that is used to produce carbon fiber is polyacrylonitrile fibre (PANF), this fiber need carry out pre-oxidation treatment earlier before carbonization, its objective is that the linear molecule chain that makes polyacrylonitrile is converted into heat-resisting trapezium structure,, and keep fibre morphology so that it is molten when high temperature cabonization, do not fire.Because the pre-oxidation stage is a principal element of control carbon fiber quality and output, so preoxidation process requires pre-oxidation furnace to have: furnace body temperature that (1) is wide as far as possible and temperature gradient distribution; (2) wind-warm syndrome, air quantity and the blast of big operating flexibility; (3) satisfy production efficiency and the furnace space of effective time of staying of tow; (4) energy-conservation; (5) be fit to suitability for industrialized production.The vertical heater of present more use is discrete stack, and combustion space is little, and the tow number of feeding is few, and wire travelling speed is slow, yields poorly, and energy consumption is big.Horizontal pre-oxidation furnace is generally internal heat type, and naked light is arranged in the burner hearth, easily causes catching fire of tow.And the heater element electric furnace heating wire of the horizontal pre-oxidation furnace of outer heat that has directly is wrapped in outside the burner hearth, keeps in repair very inconvenient.
The purpose of this utility model is to provide a kind of outer heating pre-oxidation furnace of horizontal type structure, and the effective warm area of this stove and accessory is long, and temperature regulating range is wide, and thermograde is adjustable, the characteristics of temperature multiple spot control.
External-heat pre-oxidation furnace of the present utility model is a horizontal chamber furnace (oven), 2-6 the burner hearth that has layering to be provided with in the stove, on burner hearth, have slideway, have the up and down split frame-type heater of two heating surfaces, can pack into or split out along slideway, each burner hearth all connects a hot-blast stove, blow by the hot-air flow distributor pipe that the burner hearth both sides are provided with, furnace roof is provided with economizer bank, and Waste gas outlet and air are blown into mouth, and fiber is by the operation of the wire slit between burner hearth.
Pre-oxidation furnace of the present utility model adopts the structure of horizontal burner hearth layering, has following advantage:
1. each pre-oxidation furnace comfort zone accumulation length is 66 meters (can supply the effective length of tow layering operation).
2. the equalizing section field width can reach 5-10, and temperature regulating range 150-300 ℃, effectively the time of staying is 40-66 minute.
3. if two pre-oxidation furnace series connection are used, then effective travel is 132 meters, and the time of staying reaches the 80-132 clock.
4. but split frame-type heater convenient for maintaining and replacing.
5. the exhaust gas entrance at body of heater top and fresh air inlet have considerable energy saving consumption reduction effect by heat exchanger.
This stove is handled fiber dimensious 3-320K, maximum operation tow number 100-120 bundle, yearly productive capacity: little tow 30-40 ton, big tow 50-80 ton.
Describe structure of the present utility model and embodiment in detail below by the accompanying drawing that provides.
Figure 1 shows that according to the outer heating pre-oxidation furnace structural representation that the utility model proposes.
Fig. 2 is that Fig. 1 K is to view.
Fig. 3 is the A-A view of Fig. 1.
Fig. 4 is a hot-air flow distributor pipe air-supply distribution schematic diagram in the burner hearth.
1 is polyacrylonitrile fibre among the figure, the 2nd, and godet, the 3rd, wire slit, the 4th, Waste gas outlet, the 5th, heat-barrier material, the 6th, economizer bank, the 7th, heating tube, the 8th, burner hearth, the 9th, surge chamber, the 10th, heat-barrier material, the 11st, furnace tubing, the 12nd, hot-air flow distributor pipe, the 13rd, slideway, the 14th, air intake, the 15th, pore.
As shown in the figure, this oxidation furnace is horizontal body of heater, but layering arranges 2-6 burner hearth 8 in the stove, among Fig. 1 What draw is four burner hearths, has slideway 13 on the burner hearth, and frame-type divides body heater 7 to fill along slideway Enter, be convenient to install or split out maintenance, the up and down position of heater 7 is equipped with heating element heater. Establish the burner hearth both sides Put the hot blast tracheorrhaphy stringing 12 of Heterogeneous Permutation, have pore 15 on the pipe 12. Each burner hearth all connects one Hot-blast stove, hot-blast stove be by surge chamber 9, and furnace tubing 11 forms, two groups of electric furnace heating wires in the furnace tubing with Parallel form is installed, and fire door adopts just open-type flange seal. Hot blast is by hot-air flow distributor pipe 12 15 up and down two in-planes (such as figure four) that are blown into vertical operation tow from the hole, arrow is depicted as hot blast and blows The direction that goes out. The air quantity adjustable range that hot-blast stove provides is 0-300 cubic meter/time, blast 0.003-0.035MPa, body of heater centre wind speed 0.13-0.25 meter per second is continuously adjustable. The body of heater top If Waste gas outlet 4, air intake 14 and heat exchange air economizer bank 6. Air is sent into after metering in advance Oxidation body of heater top makes the hot waste gas that gives off in the stove and the fresh air of sending into carry out heat exchange, after Hold in both hands out waste gas, give fresh air after the heat and import each hot-blast stove and be heated to and send into correspondence after temperature required Each burner hearth. Utilize the external dispersed heat preheating of pre-oxidation furnace body to advance the air of stove, can be with 240 cubes In rice/time,, air was increased to 60-120 ℃ from room temperature, saved electrical power 9-20KW. Polyacrylonitrile fibre 1 by Godet 2 is pulled in back and forth operation in the wire slit 3 between the burner hearth, carries out in 200-270 ℃ of scope Fully pre-oxidation. With the matching used in addition drafter of pre-oxidation furnace, 2-4 dominant draft dress arranged Put, 4-10 secondary drafting system arranged, available frequency converter is arbitrarily regulated the degree of draft of different warm areas. No matter Dominant draft device or secondary drafting system, driven roll all can regulate and drive roll between spacing, with Adapt to the demand degree of draft different with adjusting when wearing thread. Temperature control system available digital formula temperature controller, also The control of available microcomputer network is so that institute's controlling temperature is required ± 3 ℃.
Embodiment 1
Polyacrylonitrile fibre 6K, 60 bundles, 80 meters of the tow speeds of service/time, back and forth moving 11 layers, pre-oxidation furnace is provided with 5 sections of temperature (separate unit body of heater), temperature range 225-265 ℃.The heating air blast, without the heat exchange of pre-oxidation body of heater, hot-blast stove add quantity of hot air be respectively 55,55,60,55 cubic metres/time.Wind-warm syndrome: 220,225,250 ℃, blast 0.01MPa.During dynamic balancing, hot blast protects adduction power 23.38KW.The product test result, intensity 250MPa, elongation 13%, silk footpath 10.1 μ m, density 1.406g/cm
3
Embodiment 2
Polyacrylonitrile fibre 6K, 80 bundles, 85 meters of the tow speeds of service/time, in the stove reciprocal 11 layers.Pre-oxidation furnace is provided with temperature range: 205-270 ℃ of 5 sections of warm area (separate unit body of heater).Air is sent into hot-blast stove heating after the preheating of pre-oxidation furnace body, 195,215,230,250 ℃ of heating-up temperatures, air quantity be respectively 70,70,75,70 cubic metres/time, blast: 0.01MPa.During dynamic balancing, hot-blast stove adduction power 15KW.Product test result: intensity 303MPa, elongation 13.5%, silk footpath 9.87 μ m, density 1.38g/cm
3
Claims (1)
1. external-heat pre-oxidation furnace, be horizontal type structure, it is characterized in that having in the stove 2-6 the burner hearth (8) of layering setting, on burner hearth, have slideway (13), split frame-type heater (7) with two heating surfaces up and down can be packed into or splits out along slideway, each stove subjectively all connects a hot blast and is jealous of, blow by the hot-air flow distributor pipe (12) that the burner hearth both sides are provided with, furnace roof is provided with economizer bank (6), Waste gas outlet (4) and air are blown into mouthful (14), and fiber is by the operation of the wire slit (3) between burner hearth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95226608 CN2251122Y (en) | 1995-11-27 | 1995-11-27 | External heating type furnace for preliminary heat treatment in oxidizing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95226608 CN2251122Y (en) | 1995-11-27 | 1995-11-27 | External heating type furnace for preliminary heat treatment in oxidizing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2251122Y true CN2251122Y (en) | 1997-04-02 |
Family
ID=33872718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95226608 Expired - Fee Related CN2251122Y (en) | 1995-11-27 | 1995-11-27 | External heating type furnace for preliminary heat treatment in oxidizing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2251122Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660810A (en) * | 2012-03-21 | 2012-09-12 | 上海联川自动化科技有限公司 | Fireproof layers of carbon fiber oxidation furnace |
| CN107557909A (en) * | 2017-08-25 | 2018-01-09 | 中国科学院宁波材料技术与工程研究所 | A kind of air oxidation stove and its application |
| CN108716857A (en) * | 2018-07-26 | 2018-10-30 | 青岛海源实业有限公司 | A kind of layering burner hearth Liftable type multilayer resistance-heated furnace |
| CN114318592A (en) * | 2022-01-28 | 2022-04-12 | 新创碳谷控股有限公司 | Novel carbon fiber pre-oxidation furnace with air distribution structure |
| CN114775111A (en) * | 2022-05-16 | 2022-07-22 | 清华大学 | Carbon fiber pre-oxidation system and high-temperature tail gas backflow method |
-
1995
- 1995-11-27 CN CN 95226608 patent/CN2251122Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660810A (en) * | 2012-03-21 | 2012-09-12 | 上海联川自动化科技有限公司 | Fireproof layers of carbon fiber oxidation furnace |
| CN102660810B (en) * | 2012-03-21 | 2014-04-09 | 上海联川自动化科技有限公司 | Fireproof layers of carbon fiber oxidation furnace |
| CN107557909A (en) * | 2017-08-25 | 2018-01-09 | 中国科学院宁波材料技术与工程研究所 | A kind of air oxidation stove and its application |
| CN107557909B (en) * | 2017-08-25 | 2020-07-14 | 中国科学院宁波材料技术与工程研究所 | Air oxidation furnace and application thereof |
| CN108716857A (en) * | 2018-07-26 | 2018-10-30 | 青岛海源实业有限公司 | A kind of layering burner hearth Liftable type multilayer resistance-heated furnace |
| CN108716857B (en) * | 2018-07-26 | 2024-04-19 | 青岛海源碳烯铝合金新材料科技有限公司 | Layered hearth lifting type multilayer resistance heating furnace |
| CN114318592A (en) * | 2022-01-28 | 2022-04-12 | 新创碳谷控股有限公司 | Novel carbon fiber pre-oxidation furnace with air distribution structure |
| CN114775111A (en) * | 2022-05-16 | 2022-07-22 | 清华大学 | Carbon fiber pre-oxidation system and high-temperature tail gas backflow method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |