CN104342784B - In the production of a kind of carbon fiber, the waste gas of low temperature carbonization furnace controls discharge method - Google Patents
In the production of a kind of carbon fiber, the waste gas of low temperature carbonization furnace controls discharge method Download PDFInfo
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- CN104342784B CN104342784B CN201310333070.4A CN201310333070A CN104342784B CN 104342784 B CN104342784 B CN 104342784B CN 201310333070 A CN201310333070 A CN 201310333070A CN 104342784 B CN104342784 B CN 104342784B
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Abstract
The present invention relates to the waste gas of low temperature carbonization furnace during a kind of carbon fiber produces and control discharge method; Electric with worm line is set at carbide furnace exhaust pipe outer wall, is heated to 400 DEG C; At exhaust pipe with low temperature carbonization furnace junction equipped with dish valve, the exhaust pipe after dish valve outlet port is furnished with four-way pipe; Large quantity of exhaust gas, by controlling the dish valve opening on exhaust pipe, controls the offgas discharge amount in low temperature carbonization furnace, makes low-temperature carbonization furnace pressure be in the state more than 1 air pressure 5��20Pa, and waste gas is discharged in gaseous form; This method solve low temperature carbonization furnace toxic emission problem, by installing drain valve, electric tracing and four-way pipe on waste line additional, achieve the waste gas that low temperature carbonization furnace is produced to process preferably, meet the requirement of fiber even running, the method technique is simple, effect is obvious, it is easy to realize industrialized production.
Description
Technical field:
The present invention relates to the waste gas of low temperature carbonization furnace during a kind of carbon fiber produces and control discharge method.
Background technology:
In producing carbon fiber process, polyacrylonitrile fibril is through the traction of actuating device, by multiple heating furnaces, completes each reaction process of carbonization, and final production goes out carbon fiber. Low temperature carbonization furnace is heating furnace comparatively crucial in carbon fiber production process, and furnace superintendent is between 10��15 meters, and operating temperature reaches as high as 800 DEG C. Low temperature carbonization furnace, when silicon carbide/polypropylene nitrile oxidization fiber, has N in stove2Deng noble gas as protective gas, oxidization fiber at high temperature can crack generation HCN, NH3��H2��CO��CO2In gas and substantial amounts of tar, these waste gas are unfavorable for fibers carbonization, and the quality of fiber is affected very big by especially substantial amounts of tar gas deposition, it is easy to cause fiber fracture of wire, so must be discharged by waste gas in time.
Summary of the invention:
It is an object of the invention to overcome prior art Problems existing, it is provided that in the production of a kind of carbon fiber, the waste gas of low temperature carbonization furnace controls discharge method, to meet carbon fiber even running in low temperature carbonization furnace, it is ensured that the steady quality of carbon fiber product.
The technical scheme is that in the production of a kind of carbon fiber, the waste gas of low temperature carbonization furnace controls discharge method, arranges electric with worm line at carbon fiber low-temperature carbonization furnace exhaust pipe outer wall, by heating temperatures to 400 DEG C, at electric with worm line arranged outside heat-insulation layer; At exhaust pipe with low temperature carbonization furnace junction equipped with dish valve, the exhaust pipe after dish valve outlet port is furnished with four-way pipe, and wherein Single port is connected with dish valve, and another port is Waste gas outlet, and all the other port flanges block; The protection N passed in low temperature carbonization furnace2And PAN-based stabilized fiber cracks the large quantity of exhaust gas of generation in low temperature carbonization furnace, by controlling the dish valve opening on exhaust pipe, control the offgas discharge amount in low temperature carbonization furnace, make the state more than 1 air pressure 5��20Pa in low temperature carbonization furnace, it is prevented that air enters in stove;Under electric with worm line and heat-insulation layer effect, make the waste gas of the overwhelming majority discharge in gaseous form, reduce the deposition that waste gas is coal-tar middle oil; Regularly open the flange of four-way pipe, check and clear up the tar of deposition in Waste gas outlet and pipeline, to ensure that waste gas is discharged smoothly.
The present invention compared with prior art has following significant progress:
(1) by being provided with electric with worm line at carbon fiber low-temperature carbonization furnace exhaust pipe outer wall, by heating temperatures to 400 DEG C, outside electric with worm line, it is provided with heat-insulation layer, it is prevented that the deposition that waste gas is coal-tar middle oil, makes the waste gas that low temperature carbonization furnace produces, discharge in a gaseous form;
(2) in exhaust pipe and low temperature carbonization furnace junction equipped with dish valve, after dish valve, exhaust pipe is furnished with in four-way pipe Single port and connects, another port discharge waste gas, and all the other port flanges block; By controlling the dish valve opening on exhaust pipe, control the gas discharge amount in low temperature carbonization furnace, make the state more than 1 air pressure 5��20Pa in low temperature carbonization furnace, it is prevented that air enters in stove;
(3) regularly open the flange of four-way pipe, check and clear up the tar of deposition in Waste gas outlet and pipeline, to ensure that waste gas is discharged smoothly.
The deposition of low temperature oven burner place tar is decreased by above technical measures, and decrease the generation of oil tar lump, thus solving owing to the oil tar lump of tar gas deposition drops to the problem causing tow impaired on tow, ensure that the even running of tow, make the accepted product percentage of product improve about 4%. Also assures that the reaction environment in low temperature oven is stable by above technical measures, improve reactive state so that the intensity index of product is brought up to 3.8GPa by 3.4GPa, make the steady long-term operation of low temperature carbonization furnace, it is ensured that the steady quality of product.
Detailed description of the invention:
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is that one carbon fiber low-temperature carbonization furnace waste gas of the present invention controls discharge technology schematic diagram.
1 low temperature carbonization furnace, 2 tow, 3 nitrogen tube, 4 electric tracings, 5 four-way pipes, 6 dish valves.
It can be seen from figure 1 that the waste gas of low temperature carbonization furnace 1 controls discharge method in the production of a kind of carbon fiber, it is provided with electric tracing 4 at carbon fiber low-temperature carbonization furnace exhaust pipe outer wall, outside electric tracing, is provided with heat-insulation layer; At exhaust pipe with low temperature carbonization furnace 1 junction equipped with dish valve 6, after dish valve, exhaust pipe is furnished with four-way pipe 5, and wherein Single port is connected with dish valve 6, and another port is for discharge waste gas, and all the other port flanges block; By nitrogen tube 3 to the protection N passed in low temperature carbonization furnace2, PAN-based stabilized fiber bundle 2 in low temperature carbonization furnace, crack the large quantity of exhaust gas of generation, by controlling the dish valve opening on exhaust pipe, control the gas discharge amount in low temperature carbonization furnace, make in low temperature carbonization furnace, to be in the state more than 1 air pressure 5��20Pa, it is prevented that air enters in stove; Under electric with worm line and heat-insulation layer effect, heating-up temperature is in 400 DEG C, makes the waste gas of the overwhelming majority discharge in gaseous form, reduces the deposition that waste gas is coal-tar middle oil; Regularly open the flange of four-way pipe, check and clear up the tar of deposition in Waste gas outlet and pipeline, to ensure that waste gas is discharged smoothly.
1) oxidization fiber of polyacrylonitrile fibril is through low temperature carbonization furnace carbonization treatment;
2) protective gas N is passed in low temperature carbonization furnace stove2;
3) by regulating drain valve, toxic emission flow is controlled, it is ensured that pressure-fired in stove;
4) equipped with electric tracing on toxic emission pipeline, its heating-up temperature is set as > 400 DEG C, it is prevented that tar deposition in-line;
5) regularly open the flange of four-way pipe, check and clear up the tar of deposition in Waste gas outlet and pipeline.
Claims (1)
1. the toxic emission method of low temperature carbonization furnace in a carbon fiber production, it is characterised in that:
Electric with worm line is set at carbon fiber low-temperature carbonization furnace exhaust pipe outer wall, by heating temperatures to 400 DEG C, outside electric with worm line, is provided with heat-insulation layer; At exhaust pipe with low temperature carbonization furnace junction equipped with dish valve, the exhaust pipe after dish valve outlet port is furnished with four-way pipe, and wherein Single port is connected with dish valve, and another port is Waste gas outlet, and all the other port flanges block; The protection N passed in low temperature carbonization furnace2And PAN-based stabilized fiber cracks the large quantity of exhaust gas of generation in low temperature carbonization furnace, by controlling the dish valve opening on exhaust pipe, control the offgas discharge amount in low temperature carbonization furnace, make low-temperature carbonization furnace pressure be in the state more than 1 air pressure 5��20Pa, it is prevented that air enters in stove; Under electric with worm line and heat-insulation layer effect, the waste gas of the overwhelming majority is discharged in gaseous form, reduces the deposition that waste gas is coal-tar middle oil; Regularly open the flange of four-way pipe, check and clear up the tar of deposition in Waste gas outlet and pipeline, to ensure that waste gas is discharged smoothly.
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| CN201310333070.4A CN104342784B (en) | 2013-08-02 | 2013-08-02 | In the production of a kind of carbon fiber, the waste gas of low temperature carbonization furnace controls discharge method |
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| CN201310333070.4A CN104342784B (en) | 2013-08-02 | 2013-08-02 | In the production of a kind of carbon fiber, the waste gas of low temperature carbonization furnace controls discharge method |
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| CN104342784A CN104342784A (en) | 2015-02-11 |
| CN104342784B true CN104342784B (en) | 2016-06-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107164844A (en) * | 2017-06-07 | 2017-09-15 | 广州赛奥碳纤维技术有限公司 | A kind of high-efficiency carbon fibre low temperature carbonization furnace waste discharge pipe-line system |
| CN110242973A (en) * | 2019-06-13 | 2019-09-17 | 浙江精功碳纤维有限公司 | A kind of carbon fiber production exhaust-gas treatment pipe-line system |
| CN112760753B (en) * | 2021-01-18 | 2023-01-17 | 荣成碳纤维科技有限公司 | Vertical low-temperature carbonization furnace and production process thereof |
| CN115434042B (en) * | 2022-09-23 | 2023-10-03 | 山西钢科碳材料有限公司 | Atmosphere control method for polyacrylonitrile-based carbon fiber pre-oxidized fiber in carbonization process |
Citations (3)
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|---|---|---|---|---|
| CN201280433Y (en) * | 2008-03-26 | 2009-07-29 | 威海拓展纤维有限公司 | Low-temperature carbonization furnace with dehumidifier |
| 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 |
| CN202909561U (en) * | 2012-10-22 | 2013-05-01 | 陕西天宏硅材料有限责任公司 | Novel tail gas filtering device of polycrystalline silicon reduction furnace and thermal hydrogenation furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2010021123A1 (en) * | 2008-08-22 | 2010-02-25 | 株式会社マイクロ・エナジー | Gasification device, fuel generation system, gasification method, and fuel generation method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201280433Y (en) * | 2008-03-26 | 2009-07-29 | 威海拓展纤维有限公司 | Low-temperature carbonization furnace with dehumidifier |
| 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 |
| CN202909561U (en) * | 2012-10-22 | 2013-05-01 | 陕西天宏硅材料有限责任公司 | Novel tail gas filtering device of polycrystalline silicon reduction furnace and thermal hydrogenation furnace |
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