CN106480553A - A kind of pre-oxidation device for carbon fiber production - Google Patents
A kind of pre-oxidation device for carbon fiber production Download PDFInfo
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- CN106480553A CN106480553A CN201610926303.5A CN201610926303A CN106480553A CN 106480553 A CN106480553 A CN 106480553A CN 201610926303 A CN201610926303 A CN 201610926303A CN 106480553 A CN106480553 A CN 106480553A
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- oxidation furnace
- temperature
- oxidation
- burner hearth
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/20—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products
- D01F9/21—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F9/22—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyacrylonitriles
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a kind of pre-oxidation device for carbon fiber production, belongs to carbon fiber production and processing technical field.The pre-oxidation device includes pre-oxidation furnace, air feed system, exhaust system, driving means and temperature measurement control system.Wherein, pre-oxidation furnace is composed in series by the first pre-oxidation furnace and the second pre-oxidation furnace, first pre-oxidation furnace and the second pre-oxidation furnace are respectively provided with some burner hearths arranged in parallel up and down, first pre-oxidation furnace internal furnace temperature is gradually risen from bottom to top, and the fire box temperature of the second pre-oxidation furnace 5 is gradually risen from top to bottom.Air feed system and exhaust system are connected with the burner hearth of the first pre-oxidation furnace and the second pre-oxidation furnace by pipeline, and driving means are installed in the two ends of each burner hearth.The pre-oxidation furnace has warm area and temperature gradient distribution rationally, the features such as heating system temperature is uniform, is accurately controlled in-furnace temperature and gradually changes between 100 DEG C 300 DEG C, and temperature control precision can ensure to be not less than ± 0.5 DEG C.
Description
Technical field
The present invention relates to a kind of pre-oxidation device for carbon fiber production, belongs to carbon fiber production and processing technical field.
Background technology
In carbon fibre carbonizing production process to the first step be exactly preoxidation process, its objective is to make with linear macromolecule
The polyacrylonitrile fibril of chain cannot not be changed into moltenly the heat-resisting trapezium structure not fired after high temperature oxidation process so as to stand follow-up
High temperature cabonization process and keep fiber condition.
Preoxidation process is very big to the quality of carbon fiber and the impact of yield.The pre-oxidation type of furnace both domestic and external has interior heat at present
Formula pre-oxidation furnace, external heating type furnace for preliminary, recirculation furnace, solid-solid heat transfer stove, the pre-oxidation furnace with sulfuric horizon are multiple, per
Kind of pre-oxidation furnace is according to each different technique with each different, and pre existing oxidation equipment generally existing body of heater is close
Seal bad grade, the unequal phenomenon of isothermal region.Therefore, it is badly in need of one kind and can meets polyacrylonitrile fibril pre-oxidation characteristic, technique bar
Part and production-scale pre-oxidation furnace.
Content of the invention
For solving above-mentioned technical problem the invention provides a kind of pre-oxidation device for carbon fiber production, is taken
Technical scheme is as follows：
A kind of pre-oxidation device for carbon fiber production, including pre-oxidation furnace, air feed system 2, exhaust system 3, drives
Device 4 and temperature measurement control system.Wherein, pre-oxidation furnace be by the first pre-oxidation furnace 1 and 5 series connection group of the second pre-oxidation furnace
Become, the first pre-oxidation furnace 1 and the second pre-oxidation furnace 5 are respectively provided with some burner hearths arranged in parallel up and down, in the first pre-oxidation furnace 1
The temperature of fire box temperature upper strata burner hearth is not less than the temperature of lower floor's burner hearth, the fire box temperature lower floor burner hearth of the second pre-oxidation furnace 5
Temperature is not less than the temperature of upper strata burner hearth；It is pre- with the first pre-oxidation furnace 1 and second that air feed system 2 and exhaust system 3 pass through pipeline
The burner hearth connection of oxidation furnace 5, driving means 4 are installed in the two ends of each burner hearth.
Preferably, the heating furnace body of pre-oxidation furnace includes burner hearth 11, the pre-oxidation furnace heat-insulation layer 12 in 11 outside of burner hearth and logical
Pre-oxidation furnace temperature sensor 13 and pre-oxidation furnace heater 14 that oversampling circuit is connected with temperature measurement control system；Wherein pre-oxidation furnace
Temperature sensor 13 and pre-oxidation furnace heater 14 are arranged between burner hearth 11 and pre-oxidation furnace heat-insulation layer 12, to realize in burner hearth
The detection of temperature and control.
Preferably, air feed system 2 includes pressure fan 21, and the blast main 22 being connected with 21 air outlet of pressure fan, with air-supply
22 connection of supervisor the blowpipe 23 being connected with side in the middle part of each burner hearth of pre-oxidation furnace respectively, blowpipe 23 is near entrance
Outside is provided with air blowing control valve 24, is provided with supply air sensor 26 and air-supply heater 25, in air-supply inside blowpipe 23
Ajutage heat-insulation layer 27 is additionally provided with outside pipe 23.
It is highly preferred that supply air sensor 26 is chain with temperature measurement control system with air-supply heater 25, so as to being supplied
The temperature of wind is controlled.
Preferably, exhaust system 3 is respectively arranged at two ends with the first air-out in the first pre-oxidation furnace 1 and the second pre-oxidation furnace 5
Pipe 31 and the second discharge pipe 32, the first discharge pipe 31 and the second discharge pipe 32 by respectively with going out that each burner hearth two ends is connected
Wind arm 33 is connected.
Preferably, first pre-oxidation furnace 1 and the second pre-oxidation furnace 5 have 7 burner hearths arranged in parallel up and down, silk respectively
Bundle 9 is entered from the bottom of the first pre-oxidation furnace 1 by driving means 4, and is entered back into the top of the second pre-oxidation furnace 5 by Base top contact
Portion, then driven by the bottom extraction of the second pre-oxidation furnace 5 by driving means 4.Continuous integration can be set in each burner hearth
Heating warm area, may also be employed the heating warm area of discontinuous discontinuous.For example, 6 are arranged along its length in a burner hearth
Heating warm area.
Preferably, first pre-oxidation furnace 1 and the second pre-oxidation furnace 5 have 7 burner hearths arranged in parallel up and down respectively, the
In one pre-oxidation furnace 1, the temperature of each layer burner hearth is successively raised from bottom to top；In second pre-oxidation furnace 5, the temperature of each layer burner hearth is by upper
Successively raise downwards.
Preferably, first pre-oxidation furnace 1 and the second pre-oxidation furnace 5 have 7 burner hearths arranged in parallel up and down respectively, the
In one pre-oxidation furnace 1, the temperature of each layer burner hearth is successively raised to layer 6 upwards by the bottom, and layer 7 is that temperature is not elevated
Constant temperature transition region；In second pre-oxidation furnace 5, the temperature of each layer burner hearth is successively raised down to layer 6 by top, layer 7 temperature
The not elevated constant temperature transition region of degree.
The present invention obtain beneficial effect be：
The pre-oxidation furnace of the present invention is provided with the heating compensation device chain with control device in body of heater, being capable of precise control
In-furnace temperature is gradually changed between 100 DEG C -300 DEG C, can meet the needs of PAN precursor pre-oxidation reaction well.This is pre-
Rationally, heating system temperature is uniform, and temperature control precision can ensure to be not less than ± 0.5 for the warm area of oxidation furnace and temperature gradient distribution
℃.
Meanwhile, the heat-insulating property of the pre-oxidation furnace and energy-efficient performance are good, can make furnace outer wall temperature less than 25 DEG C.The stove
Interior heat circulating system air quantity, wind-warm syndrome and blast adjustable, waste gas can be discharged by dedicated system, will not be revealed to workshop.
Description of the drawings
Fig. 1 is that the present invention first pre-oxidizes body of heater structural representation.
Fig. 2 is that the present invention second pre-oxidizes body of heater structural representation.
Fig. 3 is the structural representation of inventive vent and burner hearth junction.
In figure：1, the first pre-oxidation furnace；2, air feed system；3, exhaust system；4, driving means；5, the second pre-oxidation furnace；
9, tow；11, burner hearth；12, pre-oxidation furnace heat-insulation layer；13, pre-oxidation furnace temperature sensor；14, pre-oxidation furnace heater；21, air-supply
Machine；22, blast main；23, blowpipe；24, control valve；25, heater of blowing；26, supply air sensor；27, ajutage is protected
Warm layer；31, the first discharge pipe；32, the second discharge pipe；33, air-out arm；101, the first burner hearth；102, the second burner hearth；103, the
Three burner hearths；104, the 4th burner hearth；105, the 5th burner hearth；106, the 6th burner hearth；107, the 7th burner hearth；108, the 8th burner hearth；109,
9th burner hearth；110, the tenth burner hearth；111, the 11st burner hearth；112, the 11st burner hearth；113, the 13rd burner hearth；114, the 14th
Burner hearth.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described in further details, but described further below is not intended as the limit to the present invention
Fixed.
Wherein, Fig. 1 is that the present invention first pre-oxidizes body of heater structural representation.Fig. 2 is that the present invention second pre-oxidizes body of heater knot
Structure schematic diagram.In Fig. 1 and Fig. 2, the direction of arrow is the direction of advance of fibre bundle.Fig. 3 is connected with burner hearth for inventive vent
The structural representation at place.The flow direction of the hot blast that the direction of arrow is provided for air feed system in Fig. 3.
Knowable to Fig. 1-Fig. 3, the pre-oxidation device includes two pre-oxidation furnaces being connected in series, i.e. the first pre-oxidation furnace 1
With the second pre-oxidation furnace 5, and the air feed system 2 of wind regime is provided for each pre-oxidation furnace, the exhaust system 3 for scavenging, Gu
It is scheduled on the driving means 4 of pre-oxidation furnace both sides.Meanwhile, it is additionally provided with by cable circuit and each part heating element heater and temperature sensing
The temperature measurement control system of element connection, to realize the precise control of overall to pre-oxidation device and each spot temperature.
First pre-oxidation furnace 1 mainly by from upper first burner hearth 101 arranged in parallel successively upwards, the second burner hearth 102, the
Three burner hearths 103, the 4th burner hearth 104, the 5th burner hearth 105, the 6th burner hearth 106 and the 7th burner hearth 107 constitute.And the second pre-oxidation furnace
5 mainly by the 8th burner hearth 108 arranged in parallel successively from the top down, the 9th burner hearth 109, the tenth burner hearth 110, the 11st stove
Thorax 111, the 11st burner hearth 112, the 13rd burner hearth 113 and the 14th burner hearth 114 constitute.It is designed with driving on the both sides of each burner hearth
Dynamic roller drives tow 9 to advance as driving means 4.In use, the temperature of 101 to the 14th burner hearth 114 of the first burner hearth
Incremented by successively, tow 9 are entered from the left side of first burner hearth of bottom 101 of the first pre-oxidation furnace 1, are drawn by the right side of the 7th burner hearth 107
Go out and enter the left side of the 8th burner hearth 108 of the second pre-oxidation furnace 5, finally drawn by the right side of the 14th burner hearth 114.Using
During, also can be using the 7th burner hearth 107 and the 14th burner hearth 114 as temperature-resistant constant temperature transition region.
First pre-oxidation furnace 1 is identical with the length of each burner hearth in the second pre-oxidation furnace 5, and two ends alignment.In each stove
The centre of thorax is nearby connected with the blowpipe 23 of air feed system 2 side, to realize wind-force supply.Air feed system 2 is provided with air-supply
Machine 21, and the blast main 22 being connected with 21 air-supply outlet of pressure fan, blast main 22 respectively with above-mentioned blowpipe 23
Connection.Control valve 24 is provided near connecting portion of the blowpipe 23 with blast main 22, in order to control air output.In air-supply
Air-supply heater 25 and supply air sensor 26 (Fig. 3) is provided with arm 23, and is additionally provided with ajutage heat-insulation layer 27 outside tube wall.
In the same manner, pre-oxidation furnace temperature sensor 13 is provided between each burner hearth 11 and the pre-oxidation furnace heat-insulation layer 12 being wrapped in outside burner hearth 11
With pre-oxidation furnace heater 14, and above-mentioned heater and sensor all practiced by cable circuit and temperature measurement control system
Level, to realize to the detection of temperature and control in blow pipeline and burner hearth.Above-mentioned heater and sensor can be used as temperature-compensatings
Device and control device, such as computer, the temperature being electrically connected in accurate chain control burner hearth of the furnace body.
Be mounted on exhaust system 3 on each pre-oxidation furnace, exhaust system 3 be by the first discharge pipe 31, the second discharge pipe
32 and 14 air-out arms 33.Wherein, the first discharge pipe 31 and the second discharge pipe 32 are vertically arranged, each installed in pre-oxidation furnace
The both sides of burner hearth, and connected by the sidepiece near both sides end points of the air-out arm 33 with each burner hearth or top, in order to incite somebody to action
The waste gas produced in preoxidation process is excluded from body of heater.
Although the present invention is disclosed as above with preferred embodiment, which is not limited to the present invention, any is familiar with this
The people of technology, without departing from the spirit and scope of the present invention, can do various changes and modification, therefore the protection of the present invention
Scope should be by being defined that claims are defined.
Claims (8)
1. a kind of pre-oxidation device for carbon fiber production, including pre-oxidation furnace, air feed system (2), exhaust system (3), drives
Dynamic device (4) and temperature measurement control system, it is characterised in that pre-oxidation furnace be by the first pre-oxidation furnace (1) and the second pre- oxygen
Change stove (5) to be composed in series, the first pre-oxidation furnace (1) and the second pre-oxidation furnace (5) are respectively provided with some stoves arranged in parallel up and down
Thorax, the temperature of the first pre-oxidation furnace (1) internal furnace temperature upper strata burner hearth are not less than the temperature of lower floor's burner hearth, the second pre-oxidation furnace
(5) temperature of fire box temperature lower floor burner hearth is not less than the temperature of upper strata burner hearth；Air feed system (2) and exhaust system (3) pass through
Pipeline is connected with the burner hearth of the first pre-oxidation furnace (1) and the second pre-oxidation furnace (5), and driving means (4) are installed in each burner hearth
Two ends.
2. the pre-oxidation device described in claim 1, it is characterised in that the heating furnace body of pre-oxidation furnace includes burner hearth (11), stove
Pre-oxidation furnace heat-insulation layer (12) and the pre-oxidation furnace temperature being connected with temperature measurement control system by circuit on the outside of thorax (11) is passed
Sensor (13) and pre-oxidation furnace heater (14)；Wherein pre-oxidation furnace temperature sensor (13) and pre-oxidation furnace heater (14) are installed
Between burner hearth (11) and pre-oxidation furnace heat-insulation layer (12).
3. the pre-oxidation device described in claim 1, it is characterised in that air feed system (2) includes pressure fan (21), with pressure fan
(21) air outlet connection blast main (22), be connected with blast main (22) and respectively with each burner hearth medial side of pre-oxidation furnace
The blowpipe (23) of face connection, blowpipe (23) is provided with air blowing control valve (24) on the outside of entrance, in blowpipe
(23) inside is provided with supply air sensor (26) and air-supply heater (25), is additionally provided with ajutage insulation outside blowpipe (23)
Layer (27).
4. the pre-oxidation device described in claim 3, it is characterised in that supply air sensor (26) and air-supply heater (25) and temperature
Degree detecting and controlling system is chain.
5. the pre-oxidation device described in claim 1, it is characterised in that exhaust system (3) is in the first pre-oxidation furnace (1) and second
Pre-oxidation furnace (5) be respectively arranged at two ends with the first discharge pipe (31) and the second discharge pipe (32), the first discharge pipe (31) and second
Discharge pipe (32) is connected by the air-out arm (33) being connected with each burner hearth two ends respectively.
6. the pre-oxidation device described in claim 1, it is characterised in that the first pre-oxidation furnace (1) and the second pre-oxidation furnace
(5) there are 7 burner hearths arranged in parallel up and down respectively, tow (9) passes through bottom of the driving means (4) from the first pre-oxidation furnace (1)
Enter, and the top of the second pre-oxidation furnace (5) is entered back into by Base top contact, then driven by the second pre- oxygen by driving means (4)
The bottom for changing stove (5) is drawn.
7. the pre-oxidation device described in claim 6, it is characterised in that the first pre-oxidation furnace (1) and the second pre-oxidation furnace
(5) there are 7 burner hearths arranged in parallel up and down respectively, the temperature of each layer burner hearth is successively risen from bottom to top in the first pre-oxidation furnace (1)
High；
In second pre-oxidation furnace (5), the temperature of each layer burner hearth is successively raised from top to bottom.
8. the pre-oxidation device described in claim 6, it is characterised in that the first pre-oxidation furnace (1) and the second pre-oxidation furnace
(5) have 7 burner hearths arranged in parallel up and down respectively, in the first pre-oxidation furnace (1) temperature of each layer burner hearth by the bottom upwards to
Layer 6 is successively raised, and layer 7 is the not elevated constant temperature transition region of temperature；The temperature of each layer burner hearth in second pre-oxidation furnace (5)
Successively raised down to layer 6 by top, the not elevated constant temperature transition region of layer 7 temperature.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610926303.5A CN106480553B (en) | 2016-10-31 | 2016-10-31 | A kind of pre-oxidation device for carbon fiber production |
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| CN201610926303.5A CN106480553B (en) | 2016-10-31 | 2016-10-31 | A kind of pre-oxidation device for carbon fiber production |
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| CN106480553A true CN106480553A (en) | 2017-03-08 |
| CN106480553B CN106480553B (en) | 2018-07-17 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN109402795A (en) * | 2017-08-16 | 2019-03-01 | 中国石油化工股份有限公司 | Improve the method for pre-oxidizing and equipment of carbon fiber mechanical property |
| CN109402794A (en) * | 2017-08-16 | 2019-03-01 | 中国石油化工股份有限公司 | Weaken the equipment and heat treatment method of skin-core structure in carbon fiber |
| CN111394835A (en) * | 2020-05-12 | 2020-07-10 | 天华化工机械及自动化研究设计院有限公司 | Carbon fiber oxidation furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109402795A (en) * | 2017-08-16 | 2019-03-01 | 中国石油化工股份有限公司 | Improve the method for pre-oxidizing and equipment of carbon fiber mechanical property |
| CN109402794A (en) * | 2017-08-16 | 2019-03-01 | 中国石油化工股份有限公司 | Weaken the equipment and heat treatment method of skin-core structure in carbon fiber |
| CN109402795B (en) * | 2017-08-16 | 2021-05-11 | 中国石油化工股份有限公司 | Pre-oxidation method and equipment for improving mechanical property of carbon fiber |
| CN109402794B (en) * | 2017-08-16 | 2021-05-28 | 中国石油化工股份有限公司 | Apparatus and heat treatment method for weakening skin-core structure in carbon fiber |
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| CN111394835A (en) * | 2020-05-12 | 2020-07-10 | 天华化工机械及自动化研究设计院有限公司 | Carbon fiber oxidation furnace |
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|---|---|
| CN106480553B (en) | 2018-07-17 |
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