CN102995343A - Oxidizing furnace for pre-oxidizing PAN (polyacrylonitrile)-based fiber mat - Google Patents
Oxidizing furnace for pre-oxidizing PAN (polyacrylonitrile)-based fiber mat Download PDFInfo
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- CN102995343A CN102995343A CN2012105203696A CN201210520369A CN102995343A CN 102995343 A CN102995343 A CN 102995343A CN 2012105203696 A CN2012105203696 A CN 2012105203696A CN 201210520369 A CN201210520369 A CN 201210520369A CN 102995343 A CN102995343 A CN 102995343A
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Abstract
The invention discloses an oxidizing furnace for pre-oxidizing a PAN (polyacrylonitrile)-based fiber mat. Draught fans are arranged at the top of the furnace, and fan blades of the draught fans are arranged in a furnace body; three groups of airflow channel clapboards are arranged in the furnace body and correspond to the daurght fans respectively; a hanger is arranged below air directors of the three groups of airflow channel clapboards; one side of each draught fan is provided with three thermocouples, and the other side of each draught fan is provided with three exhaust gas discharge pipes; and electrical heating tubes are symmetrically and uniformly distributed on the inner walls of the two sides in the furnace body. According to the invention, the centrifugal circulation draught fans and air guide holes in the bottom of the furnace are combined to ensure that hot air in the furnace can circulate smoothly from top to bottom and can fully contact the hung PAN-based fiber mat after entering a hearth through the air guide holes; and the fiber mat is prevented from blocking the circulation of the hot air, so that the temperatures of all parts in the furnace tend to be uniform, reaction heat can be taken away rapidly, and the rate of finished products is improved. The oxidizing furnace has the characteristic of being convenient to maintain.
Description
Technical field
The present invention relates to a kind of PAN pre-oxidation field, specifically a kind of oxidation furnace that fibrofelt is carried out pre-oxidation.
Background technology
The charcoal felt has the excellent performances such as thermal conductivity factor is little, thermal capacity is low, density is little, high temperature resistant, heat-resisting hitting property is strong, chemical resistance is strong; be used as heat-insulating heat-preserving material in the high-temperature electric resistance furnace under vacuum or inert gas shielding, aspect economize on electricity, also obtain significant effect.
After the basic charcoal felt of polyacrylonitrile (PAN) can adopt the acupuncture of PAN staple fibre to become fibrofelt, after air pre-oxidation in inert atmosphere high temperature carbonization and getting.The effect of pre-oxidation is that thermoplasticity PAN linear molecule chain is converted into heat-resisting trapezium structure, and thermodynamics is in stable state, stands high temperature carbonization and keeps fibre morphology.
In being the patent of CN98240659.2, the patent No. introduced a kind of rotary counter-flow type preoxidation furnace that the PAN fibrofelt is carried out pre-oxidation treatment.It adopts the furnace chamber top that supply air system and heating system are set, and narrow gap layer is set in burner hearth, utilize the air after the High Rotation Speed of impeller blows heating, moving along annular narrow gap laminar flow from top to bottom, be blown into the stove from the stove inner bottom part, with hang on rotating disk on fully contact with the material of rotating disk synchronous rotary, make it temperature and progressively raise and reach pre-oxygen purpose, the negative pressure that the air after the heat exchange is formed by impeller sucks the again row heating and circulating of the thermal treatment zone, top.It adopts rotary type raw material suspension arrangement, this raw material suspension arrangement is realized by a rotating disk main shaft rotation, this rotating disk main shaft is formed by connecting by a pair of conical tooth and rotating disk fixed axis, and radial ball bearing, taper roll bearing and rotating disk are from top to bottom fixed with the rotating disk fixed axis successively.This covering device no doubt can make raw material be in dynamically by thermal process, can guarantee that raw material fully contacts with hot-air, each position heat energy temperature homogeneity is better, but its heating system is between rotary raw material suspension arrangement and supply air system, this heating system is evenly distributed along disk by resistance wire again and consists of, if resistance wire damages after repeatedly using, because the resistance wire tray is installed between supply air system and the suspension arrangement, often need when changing resistance wire to remove the rotating disk that its below hangs raw material, cause later period maintenance very inconvenient.
Summary of the invention
For overcoming the too deficiency of complexity and inconvenient maintenance of the structure that exists in the prior art, the present invention proposes a kind of oxidation furnace for pre-oxidation PAN base fibrofelt.
The present invention includes electric heating tube, blower fan, gas channel dividing plate, thermocouple, product hanger and waste gas comb; Described blower fan is positioned at furnace roof, and the fan blade of each blower fan is placed in the body of heater; Three groups of gas channel dividing plates all are positioned at body of heater and respectively corresponding blower fan; Hanger is positioned at the wind scooper below of three groups of gas channel dividing plates; Three thermocouples are installed in respectively a side of each blower fan; Three waste gas combs are installed in respectively the opposite side of each blower fan; Electric heating tube is spared on the both sides inwall of cloth in body of heater symmetrically.
Described gas channel dividing plate is comprised of two air guiding sleeves, two wind scoopers and wind deflector; Described symmetry be fixed on the fan blade both sides, the two ends of two air guiding sleeves are connected with the vertical edge welding of two wind scooper ends adjacent with fan blade respectively, make the in addition both sides that are fixed on fan blade of two wind scooper symmetries; The surface of described wind deflector is parallel with the furnace body inside wall, and is connected by flange and the inboard wall of furnace body of these wind deflector both sides; Be useful on the spacing of airflow between the sidewall of this wind deflector and the furnace body inside wall, also be useful on the spacing of airflow between the inner surface of the base plate of this wind deflector and body of heater base plate; Lower end at the biside plate of described wind deflector is distributed with air-guiding hole, also is distributed with air-guiding hole on the base plate of described wind deflector.
The described air guiding sleeve that is fixed on each fan blade both sides lays respectively at the body of heater length direction; The symmetrical in addition wind scooper of both sides that is fixed on fan blade lays respectively at the body of heater width.The aperture of described air-guiding hole is 10mm, and the center distance of two adjacent air-guiding holes is 100mm.
Spacing between the sidewall of described wind deflector and the furnace body inside wall is 100mm; Spacing between the inner surface of the base plate of this wind deflector and body of heater base plate also is 100mm.
The upper end of described electric heating tube passes furnace roof and is fixed on the outer surface of furnace roof, adopts the triangle connected mode that each electric heating tube is linked together by wire; Each electric heating tube after will connecting with the line box covers.
The lower end of described thermocouple is passed furnace roof and is inserted in the body of heater, and the terminal box of this thermocouple upper end is positioned on the furnace roof outer surface.
Among the present invention, oxidation furnace is comprised of furnace shell heat-insulation layer, heating system, supply air system, gas channel, product hanger, waste gas comb etc.The furnace shell heat-insulation layer is filled by soft felt of aluminium silicate fibre and is formed, and the temperature of outer furnace wall is no more than 45 ℃.Heating system is by forming along the equally distributed some groups of electric heating tubes of body of heater both sides inwall, and the upper end of these heating tubes is being fixed on furnace roof with screw, then covers its top with the line box.The heat resistant centrifugal fan that supply air system is comprised of with being positioned at the impeller on furnace chamber top the motor that furnace roof is installed.Described centrifugal blower distributes along the body of heater axis.The gas channel that is " returning " font on the gap Formation cross-section between polylith corrosion resistant plate and the inboard wall of furnace body, and on bottom, air channel, both sides and base plate the equally distributed air-guiding hole of fully-jewelled.When fan starting, the circulated air that the rotation fan blade produces from top to bottom moves along gas channel, and enters burner hearth by the air-guiding hole of bottom of furnace body, after this is extracted into the blade place by the centrifugal force in blower fan axle center again, thus again and again circulation.The product hanger that is arranged at supply air system below is used for hanging the PAN fibrofelt of being furnished with S type hook by being welded into level, latticed product hanger along the angle steel of stove cross direction with along the galvanized pipe of furnace superintendent direction.Waste gas comb and centrifugal blower are adjacent, and at same straight line.Thermal resistance also is installed on the furnace roof axis, in order to measure the temperature of each position in the stove.
Compared with prior art, the useful result that the present invention has is: the Combination application of centrifugal circulating fan and bottom air-guiding hole makes smoothly from top to bottom circulation of hot-air in the stove, and enter behind the burner hearth by air-guiding hole and fully to contact with the PAN fibrofelt that hangs, avoid the phenomenon that fibrofelt stops hot air circulate occurs, thereby make in the stove temperature everywhere be tending towards even.Simultaneously can take away rapidly reaction heat, make the raw material can be because of the inhomogeneous Ignition Phenomena that occurs that is heated, thereby yield rate be high.After electric heating tube damaged, the maintenance personal only need arrive furnace roof and open the line box, lays down the clamp nut on electric heating tube top, got final product to interior electric heating tube is extracted of stove again, did not relate to miscellaneous part, thus can be easily to the equipment maintenance of being correlated with.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is side view of the present invention;
Fig. 3 is the A-A cutaway view of Fig. 1;
Fig. 4 is the B-B cutaway view of Fig. 2.
Fig. 5 is the top view of wind deflector.Among the figure:
1. fire door 2. furnace walls 3. heat-insulation layers, 4. electric heating tubes 5. line boxes
6. blower fan 7. fan blades 8. gas channel dividing plates 9. air guiding sleeves 10. wind scoopers
11. wind deflector 12. subplate bearers 13. air-guiding holes 14. product hangers
15. thermocouple 16. waste gas combs
The specific embodiment
This example is a kind of oxidation furnace for the pre-oxidation of PAN fibrofelt, and box frame is steel construction piece, comprises door 1, furnace wall 2, heat-insulation layer stove 3, electric heating tube 4, blower fan 6, gas channel dividing plate 8, product hanger 14 and waste gas comb 15.
Described oxidation furnace body of heater for the pre-oxidation of PAN fibrofelt is cuboid, at the two ends of the oxidation furnace of this PAN fibrofelt pre-oxidation fire door 1 is arranged.Furnace wall 2 usefulness carbon steel sheet are made.Interior table in this furnace wall 2 is coated with the heat-insulation layer 3 that soft felt of aluminium silicate fibre is made.
Gas channel dividing plate 8 has three groups, all is positioned at the oxidation furnace body of heater, and corresponds respectively to a blower fan.The architectural feature of three groups of gas channel dividing plates 8 is identical, in the present embodiment, only take wherein one group described as example.
Described gas channel dividing plate 8 is comprised of the wind deflector 11 of two air guiding sleeves 9, two wind scoopers 10, " recessed " font.Described wind scooper 10 is the plates that are fan-shaped, and the surface of this wind scooper 10 is the groove shape; Two wind scoopers are along on the inwall that is fixed on fan blade 7 both sides body of heater top boards of the width symmetry of body of heater.Described air guiding sleeve 9 is that 1/4 circular arc is tabular; The radius of this arc is slightly larger than the appearance and size of fan blade 7; The two ends of two air guiding sleeves 9 are connected with the welding of the vertical edge of two wind scoopers 10 and fan blade 7 adjacent ends respectively, and what make two air guiding sleeve 9 symmetries is fixed on fan blade 7 both sides, and lay respectively at the length direction of body of heater.
The wind deflector 11 of " recessed " font adopts corrosion resistant plate to make.The width of this wind deflector is slightly less than cavity length in 1/3 body of heater, after each gas channel dividing plate 8 is in place, between the adjacent wind deflector spacing is arranged, and installs with convenient.The dual-side of the biside plate short transverse of described " recessed " font wind deflector has respectively outside flange, and this flange is perpendicular to the biside plate of wind deflector.Lower end at the biside plate of described " recessed " font wind deflector is distributed with air-guiding hole 13, and the aperture of this air-guiding hole is 10mm, and the center distance of adjacent two air-guiding holes is 100mm.Also be distributed with air-guiding hole on the base plate of the wind deflector 11 of " recessed " font, the aperture of this air-guiding hole is 10mm, and the center distance of adjacent two air-guiding holes is 100mm.
When described wind deflector 11 is installed, this wind deflector biside plate flanging welded is fixed on the inwall of body of heater length direction both sides, and makes the surface of described wind deflector parallel with the furnace body inside wall, the spacing of 100mm is arranged between this wind deflector and the furnace body inside wall; The upper end of these wind deflector 11 two sides is welded and fixed with the side of wind scooper 10 respectively; The base plate of this wind deflector is positioned at the blower fan below, is supported by subplate bearer 12, and the spacing of 100mm is arranged between the lower surface of the base plate of this wind deflector and the body of heater plate inner surface.This subplate bearer 12 adopts channel-section steel, is evenly distributed on furnace bottom, and is welded on the furnace bottom skeleton.
After gas channel dividing plate 8 was installed in the body of heater, the groove wind deflector 11 on wind scooper 10 surfaces and the spacing between the inboard wall of furnace body had formed the circulation road of air-flow.When fan starting, the circulated air that the rotation fan blade produces enters by in the spacing between wind deflector and the inboard wall of furnace body along the groove on wind scooper 10 surfaces, operation from top to bottom, and enter burner hearth by the air-guiding hole of bottom of furnace body, after this be extracted into the blade place by the centrifugal force in blower fan axle center again, thus again and again circulation.
Thermocouple 15 has three, all is positioned on the center line of furnace roof length direction, is installed in a side of blower fan 6, and the lower end of this thermocouple 15 passes furnace roof and insert in the body of heater, and the terminal box of these thermocouple 15 upper ends is positioned on the furnace roof outer surface.
Claims (6)
1. an oxidation furnace that is used for pre-oxidation PAN base fibrofelt is characterized in that, comprises electric heating tube, blower fan, gas channel dividing plate, thermocouple, product hanger and waste gas comb; Described blower fan is positioned at furnace roof, and the fan blade of each blower fan is placed in the body of heater; Three groups of gas channel dividing plates all are positioned at body of heater and respectively corresponding blower fan; Hanger is positioned at the wind scooper below of three groups of gas channel dividing plates; Three thermocouples are installed in respectively a side of each blower fan; Three waste gas combs are installed in respectively the opposite side of each blower fan; Electric heating tube is spared on the both sides inwall of cloth in body of heater symmetrically; Described gas channel dividing plate is comprised of two air guiding sleeves, two wind scoopers and wind deflector; Described symmetry be fixed on the fan blade both sides, the two ends of two air guiding sleeves are connected with the vertical edge welding of two wind scooper ends adjacent with fan blade respectively, make the in addition both sides that are fixed on fan blade of two wind scooper symmetries; The surface of described wind deflector is parallel with the furnace body inside wall, and is connected by flange and the inboard wall of furnace body of these wind deflector both sides; Be useful on the spacing of airflow between the sidewall of this wind deflector and the furnace body inside wall, also be useful on the spacing of airflow between the inner surface of the base plate of this wind deflector and body of heater base plate; Lower end at the biside plate of described wind deflector is distributed with air-guiding hole, also is distributed with air-guiding hole on the base plate of described wind deflector.
2. be used for as claimed in claim 1 the oxidation furnace of pre-oxidation PAN base fibrofelt, it is characterized in that, the air guiding sleeve that is fixed on each fan blade both sides lays respectively at the body of heater length direction; The symmetrical in addition wind scooper of both sides that is fixed on fan blade lays respectively at the body of heater width.
3. be used for as claimed in claim 1 the oxidation furnace of pre-oxidation PAN base fibrofelt, it is characterized in that, the aperture of described air-guiding hole is 10mm, and the center distance of two adjacent air-guiding holes is 100mm.
4. be used for as claimed in claim 1 the oxidation furnace of pre-oxidation PAN base fibrofelt, it is characterized in that, the spacing between the sidewall of described wind deflector and the furnace body inside wall is 100mm; Spacing between the inner surface of the base plate of this wind deflector and body of heater base plate also is 100mm.
5. be used for as claimed in claim 1 the oxidation furnace of pre-oxidation PAN base fibrofelt, it is characterized in that, the upper end of described electric heating tube passes furnace roof and is fixed on the outer surface of furnace roof, adopts the triangle connected mode that each electric heating tube is linked together by wire; Each electric heating tube after will connecting with the line box covers.
6. be used for as claimed in claim 1 the oxidation furnace of pre-oxidation PAN base fibrofelt, it is characterized in that, the lower end of described thermocouple is passed furnace roof and is inserted in the body of heater, and the terminal box of this thermocouple upper end is positioned on the furnace roof outer surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105203696A CN102995343A (en) | 2012-12-03 | 2012-12-03 | Oxidizing furnace for pre-oxidizing PAN (polyacrylonitrile)-based fiber mat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105203696A CN102995343A (en) | 2012-12-03 | 2012-12-03 | Oxidizing furnace for pre-oxidizing PAN (polyacrylonitrile)-based fiber mat |
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|---|---|
| CN102995343A true CN102995343A (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105203696A Pending CN102995343A (en) | 2012-12-03 | 2012-12-03 | Oxidizing furnace for pre-oxidizing PAN (polyacrylonitrile)-based fiber mat |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323506A (en) * | 2016-08-03 | 2017-01-11 | 广东优科检测技术服务有限公司 | System for measuring resistance temperature characteristics of resistor |
| CN113862942A (en) * | 2021-09-29 | 2021-12-31 | 因达孚先进材料(苏州)有限公司 | Pre-oxidation furnace system for producing viscose-based carbon felt |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201193260Y (en) * | 2008-03-26 | 2009-02-11 | 威海拓展纤维有限公司 | Preoxidation furnace |
| CN201567295U (en) * | 2009-11-17 | 2010-09-01 | 合肥日新高温技术有限公司 | Heated-air circulation degreasing furnace |
| CN201971859U (en) * | 2010-12-27 | 2011-09-14 | 苏州新长光热能科技有限公司 | Efficient air circulation flow guiding device applicable to thermal treatment furnaces |
-
2012
- 2012-12-03 CN CN2012105203696A patent/CN102995343A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201193260Y (en) * | 2008-03-26 | 2009-02-11 | 威海拓展纤维有限公司 | Preoxidation furnace |
| CN201567295U (en) * | 2009-11-17 | 2010-09-01 | 合肥日新高温技术有限公司 | Heated-air circulation degreasing furnace |
| CN201971859U (en) * | 2010-12-27 | 2011-09-14 | 苏州新长光热能科技有限公司 | Efficient air circulation flow guiding device applicable to thermal treatment furnaces |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323506A (en) * | 2016-08-03 | 2017-01-11 | 广东优科检测技术服务有限公司 | System for measuring resistance temperature characteristics of resistor |
| CN106323506B (en) * | 2016-08-03 | 2019-02-12 | 广东优科检测技术服务有限公司 | A kind of system measuring resistance resistivity-temperature characteristics |
| CN113862942A (en) * | 2021-09-29 | 2021-12-31 | 因达孚先进材料(苏州)有限公司 | Pre-oxidation furnace system for producing viscose-based carbon felt |
| CN113862942B (en) * | 2021-09-29 | 2023-08-15 | 因达孚先进材料(苏州)股份有限公司 | Pre-oxidation furnace system for producing viscose-based carbon felt |
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Application publication date: 20130327 |