CN112575412A - Continuous carbonization method of polyacrylonitrile short fiber - Google Patents
Continuous carbonization method of polyacrylonitrile short fiber Download PDFInfo
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- CN112575412A CN112575412A CN202011495556.4A CN202011495556A CN112575412A CN 112575412 A CN112575412 A CN 112575412A CN 202011495556 A CN202011495556 A CN 202011495556A CN 112575412 A CN112575412 A CN 112575412A
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- Prior art keywords
- polyacrylonitrile
- temperature
- carbonization
- conveyor belt
- fiber according
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Classifications
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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
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/04—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers
- D01F11/06—Chemical after-treatment of artificial filaments or the like during manufacture of synthetic polymers of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
- D06M13/08—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with halogenated hydrocarbons
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/16—Synthetic fibres, other than mineral fibres
- D06M2101/18—Synthetic fibres consisting of macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06M2101/26—Polymers or copolymers of unsaturated carboxylic acids or derivatives thereof
- D06M2101/28—Acrylonitrile; Methacrylonitrile
Abstract
The invention discloses a continuous carbonization method of polyacrylonitrile short fiber, which comprises the steps of loading the polyacrylonitrile short fiber into a split charging box, and filling a carbonization furnace with protective gas; the split charging boxes are sent into a carbonization furnace with the temperature of 180-300 ℃ in batches through a conveyor belt for electromagnetic oscillation heating; the subpackage boxes are sent into a cooling tank through a conveyor belt and are rapidly cooled to below 120 ℃; sending the cooled polyacrylonitrile carbonized fiber into an industrial washing machine through a conveyor belt, and adding an erosion liquid for erosion; drying the corroded polyacrylonitrile carbonized fiber at the temperature of 100 ℃. According to the invention, by adopting an electromagnetic oscillation heating mode, the uniform heating of the polyacrylonitrile short fibers in the packaging box is realized, and the carbonization effect is ensured; the continuous batch carbonization is realized by loading the polyacrylonitrile short fibers into the separate boxes and then conveying the polyacrylonitrile short fibers by the conveying belt.
Description
Technical Field
The invention relates to the technical field of carbonization, in particular to a continuous carbonization method of polyacrylonitrile short fibers.
Background
Polyacrylonitrile can be used for manufacturing synthetic fibers, artificial fibers, wool making yarns, knitted fabrics, woven fabrics and the like, and polyacrylonitrile short fibers are mostly blended with wool or wool-type chemical fibers and can be used for manufacturing articles such as nets, carpets, ropes, conveyor belts, screens and the like. Polyacrylonitrile staple fibers are widely used in the fields of textile, industry, medical treatment, and the like because of their properties.
In the production and processing process of the polyacrylonitrile carbonized short fiber, raw material polyacrylonitrile needs to be carbonized to prepare carbonized fiber. However, carbon fibers have high strength and are difficult to process into short fibers for material reinforcement. Therefore, it is necessary to process the polyacrylonitrile into short fibers having a desired size before carbonization, and then to perform carbonization. The conventional carbonization of polyacrylonitrile short fibers usually needs a small amount of carbonization for many times because the batch raw materials cannot be uniformly heated in the carbonization process, cannot realize batch continuous carbonization, and has low production efficiency.
Disclosure of Invention
The invention aims to provide a continuous carbonization method of polyacrylonitrile short fibers, which is used for continuously carbonizing the polyacrylonitrile short fibers in batches.
In order to solve the technical problem, the invention provides a continuous carbonization method of polyacrylonitrile short fiber, which comprises the following steps:
step 1: filling polyacrylonitrile short fibers into a split charging box, and filling a carbonization furnace with protective gas;
step 2: the subpackage boxes are fed into a carbonization furnace in batches through a conveyor belt for high-temperature carbonization, and polyacrylonitrile in the subpackage boxes is subjected to electromagnetic oscillation heating through an electromagnetic heating device at the bottom of the conveyor belt in the carbonization furnace, wherein the temperature in the carbonization furnace is 180-300 ℃;
and step 3: the subpackage boxes are sent into a cooling tank through a conveyor belt and are rapidly cooled to below 120 ℃;
and 4, step 4: sending the cooled polyacrylonitrile carbonized fiber into an industrial washing machine for erosion through a conveyor belt, and adding an erosion liquid at normal temperature and normal pressure for stirring erosion;
and 5: drying the corroded polyacrylonitrile carbonized fiber at the temperature of 100 ℃.
Further, the protective gas in the step 1 is gaseous heat conduction oil.
Further, the temperature of the gaseous heat transfer oil is 200 ℃.
Further, the temperature in the carbonization furnace in the step 2 is 220 ℃.
Further, in the step 2, the subpackaging boxes are fed into a carbonization furnace in batches through a conveyor belt to be carbonized at high temperature, and the duration time of the high-temperature carbonization is 90 minutes.
Furthermore, the split charging box is of a hollow structure, and the diameter of the hollow is smaller than that of the polyacrylonitrile short fiber.
Further, the rapid cooling method in the cooling tank in the step 3 is to use low-temperature gas for cooling.
Further, the etching solution in the step 4 is a tetrachloroethylene solution.
Further, the concentration of the tetrachloroethylene solution was 97.6%.
Further, in the step 4, an etching solution is added at normal temperature and normal pressure to perform stirring etching, and the duration of the stirring etching is 30 minutes.
The invention has the beneficial effects that: according to the continuous carbonization method of the polyacrylonitrile short fibers, the polyacrylonitrile short fibers in the packaging box are uniformly heated in an electromagnetic oscillation heating mode, so that the carbonization effect is ensured; the continuous batch carbonization is realized by loading the polyacrylonitrile short fibers into the separate boxes and then conveying the polyacrylonitrile short fibers by the conveying belt.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features, or indirectly contacting the first and second features through intervening media. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements does not include a limitation to the listed steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment of the invention relates to a continuous carbonization method of polyacrylonitrile short fiber, which comprises the following steps:
step 1: the polyacrylonitrile short fiber is loaded into a separate packing box which is of a hollow structure, and the diameter of the hollow is smaller than that of the polyacrylonitrile short fiber. The carbonization furnace is filled with 200 ℃ gaseous heat transfer oil which is used for preheating and isolating oxygen.
Step 2: the subpackage boxes are fed into the carbonization furnace in batches through the conveyor belt to be carbonized at high temperature for 90 minutes, the electromagnetic heating device at the bottom of the conveyor belt in the carbonization furnace is used for carrying out electromagnetic oscillation heating on polyacrylonitrile in the subpackage boxes, and the temperature in the carbonization furnace is 180-plus-300 ℃. The subpackage boxes are fed into the carbonization furnace for carbonization in batches through the conveyor belt, and the conveyor belt is fed into the next batch after the carbonization of the batch is completed, so that continuous carbonization is realized. Set up electromagnetic heating device and continue to heat to the fine polypropylene in the partial shipment box bottom the conveyer belt, compare in traditional heating methods and can guarantee the even heating when energy-conserving. Preferably, the temperature in the carbonization furnace is controlled at 220 ℃.
And step 3: and (3) conveying the subpackaging boxes into a cooling tank through a conveyor belt, and rapidly cooling to below 120 ℃, wherein the cooling method in the cooling tank is to use low-temperature gas for cooling. The low-temperature gas enters the split charging box through the hollow holes on the split charging box, and the high-temperature polyacrylonitrile carbonized short fiber in the box is uniformly and rapidly cooled.
And 4, step 4: sending the cooled polyacrylonitrile carbonized fiber into an industrial washing machine for erosion by a conveyor belt, adding a tetrachloroethylene solution with the concentration of 97.6 percent at normal temperature and normal pressure, stirring and eroding for 30 minutes.
And 5: drying the corroded polyacrylonitrile carbonized fiber at the temperature of 100 ℃.
The invention has the beneficial effects that: according to the continuous carbonization method of the polyacrylonitrile short fibers, the polyacrylonitrile short fibers in the packaging box are uniformly heated in an electromagnetic oscillation heating mode, so that the carbonization effect is ensured; the continuous batch carbonization is realized by loading the polyacrylonitrile short fibers into the separate boxes and then conveying the polyacrylonitrile short fibers by the conveying belt.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.
Claims (10)
1. A continuous carbonization method of polyacrylonitrile short fiber is characterized by comprising the following steps:
step 1: filling polyacrylonitrile short fibers into a split charging box, and filling a carbonization furnace with protective gas;
step 2: the subpackage boxes are fed into a carbonization furnace in batches through a conveyor belt for high-temperature carbonization, and polyacrylonitrile in the subpackage boxes is subjected to electromagnetic oscillation heating through an electromagnetic heating device at the bottom of the conveyor belt in the carbonization furnace, wherein the temperature in the carbonization furnace is 180-300 ℃;
and step 3: the subpackage boxes are sent into a cooling tank through a conveyor belt and are rapidly cooled to below 120 ℃;
and 4, step 4: sending the cooled polyacrylonitrile carbonized fiber into an industrial washing machine for erosion through a conveyor belt, and adding an erosion liquid at normal temperature and normal pressure for stirring erosion;
and 5: drying the corroded polyacrylonitrile carbonized fiber at the temperature of 100 ℃.
2. The continuous carbonizing method of polyacrylonitrile staple fiber according to claim 1, characterized in that: the protective gas in the step 1 is gaseous heat conducting oil.
3. The continuous carbonizing method of polyacrylonitrile short fiber according to claim 2, characterized in that: the temperature of the gaseous heat conducting oil is 200 ℃.
4. The continuous carbonizing method of polyacrylonitrile staple fiber according to claim 1, characterized in that: the temperature in the carbonization furnace in the step 2 is 220 ℃.
5. The continuous carbonizing method of polyacrylonitrile staple fiber according to claim 1, characterized in that: and in the step 2, the subpackaging boxes are fed into a carbonization furnace in batches through a conveyor belt to be carbonized at high temperature, and the duration time of the high-temperature carbonization is 90 minutes.
6. The continuous carbonizing method of polyacrylonitrile staple fiber according to claim 1, characterized in that: the distribution box is of a hollow structure, and the diameter of the hollow is smaller than that of the polyacrylonitrile short fibers.
7. The continuous carbonizing method of polyacrylonitrile staple fiber according to claim 1, characterized in that: the rapid cooling method in the cooling tank in the step 3 is to use low-temperature gas for cooling.
8. The continuous carbonizing method of polyacrylonitrile staple fiber according to claim 1, characterized in that: and 4, the erosion liquid in the step 4 is tetrachloroethylene solution.
9. The continuous carbonizing method of polyacrylonitrile staple fiber according to claim 8, characterized in that: the concentration of the tetrachloroethylene solution was 97.6%.
10. The continuous carbonizing method of polyacrylonitrile staple fiber according to claim 1, characterized in that: and in the step 4, adding an etching solution at normal temperature and normal pressure for stirring and etching, wherein the stirring and etching duration is 30 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011495556.4A CN112575412A (en) | 2020-12-17 | 2020-12-17 | Continuous carbonization method of polyacrylonitrile short fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011495556.4A CN112575412A (en) | 2020-12-17 | 2020-12-17 | Continuous carbonization method of polyacrylonitrile short fiber |
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| Publication Number | Publication Date |
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| CN112575412A true CN112575412A (en) | 2021-03-30 |
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| CN202011495556.4A Pending CN112575412A (en) | 2020-12-17 | 2020-12-17 | Continuous carbonization method of polyacrylonitrile short fiber |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115262038A (en) * | 2022-06-15 | 2022-11-01 | 浙江技立新材料股份有限公司 | Polyacrylonitrile preoxidation carbonization equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4543241A (en) * | 1983-04-18 | 1985-09-24 | Toho Beslon Co., Ltd. | Method and apparatus for continuous production of carbon fibers |
| WO2006101084A1 (en) * | 2005-03-23 | 2006-09-28 | Bridgestone Corporation | Carbon fiber and processes for (continuous) production thereof, and catalyst structures, electrodes for solid polymer fuel cells, and solid polymer fuel cells, made by using the carbon fiber |
| CN101421448A (en) * | 2006-04-15 | 2009-04-29 | 东邦特耐克丝株式会社 | Continuous process for the production of carbon fibres |
| US20160160396A1 (en) * | 2014-12-05 | 2016-06-09 | Cytec Industries Inc. | Continuous carbonization process and system for producing carbon fibers |
-
2020
- 2020-12-17 CN CN202011495556.4A patent/CN112575412A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4543241A (en) * | 1983-04-18 | 1985-09-24 | Toho Beslon Co., Ltd. | Method and apparatus for continuous production of carbon fibers |
| WO2006101084A1 (en) * | 2005-03-23 | 2006-09-28 | Bridgestone Corporation | Carbon fiber and processes for (continuous) production thereof, and catalyst structures, electrodes for solid polymer fuel cells, and solid polymer fuel cells, made by using the carbon fiber |
| CN101421448A (en) * | 2006-04-15 | 2009-04-29 | 东邦特耐克丝株式会社 | Continuous process for the production of carbon fibres |
| US20160160396A1 (en) * | 2014-12-05 | 2016-06-09 | Cytec Industries Inc. | Continuous carbonization process and system for producing carbon fibers |
Non-Patent Citations (2)
| Title |
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| 世界卫生组织: "《饮用水水质准则 第四版》", 31 December 2014, 上海交通大学出版社 * |
| 徐樑华等: "《聚丙烯腈基碳纤维》", 31 August 2018, 国防工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115262038A (en) * | 2022-06-15 | 2022-11-01 | 浙江技立新材料股份有限公司 | Polyacrylonitrile preoxidation carbonization equipment |
| CN115262038B (en) * | 2022-06-15 | 2023-08-15 | 浙江技立新材料股份有限公司 | Polyacrylonitrile preoxidation carbonization equipment |
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