CN101984155A - Method for drying ultra-high molecular weight polyethylene fibers - Google Patents
Method for drying ultra-high molecular weight polyethylene fibers Download PDFInfo
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- CN101984155A CN101984155A CN 201010508194 CN201010508194A CN101984155A CN 101984155 A CN101984155 A CN 101984155A CN 201010508194 CN201010508194 CN 201010508194 CN 201010508194 A CN201010508194 A CN 201010508194A CN 101984155 A CN101984155 A CN 101984155A
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Abstract
The invention discloses a method for drying ultra-high molecular weight polyethylene fibers. The preparation process of the ultra-high molecular weight polyethylene fibers comprises the following steps: mixing ultra-high molecular weight polyethylene powder with white oil; after the ultra-high molecular weight polyethylene powder is dissolved, jetting the mixture out of the spinneret orifice so that the mixture is suddenly cooled to solidify to obtain jel yarns; extracting the jel yarns to remove mineral oil; drying the extracted yarns to remove an extractant; and finally, carrying out multistage ultra-drawing to obtain the finished fibers. The drying process comprises a drying plant, a gas recovery device and a gas drying processor, wherein the drying plant is formed by connecting two or more than two stages of drying boxes in series; every adjacent two drying boxes are connected through a pipeline or channel; and the flow direction of the dry gas in the drying boxes is opposite to the motion direction of the fiber yarn bundle. The method has the advantages of simple and reasonable structure technique, energy conservation, consumption reduction, no exhaust emission, high safety, environmental protection and the like.
Description
Technical field
The invention relates to a kind of technology of preparing of superhigh molecular weight polyethylene fibers, the drying means of fibre bundle in particularly a kind of superhigh molecular weight polyethylene fibers production process.
Background technology
Superhigh molecular weight polyethylene fibers is the third generation high-performance fiber that occurs after carbon fiber, aramid fiber, is the fiber of the extended-chain configuration of height-oriented, highly crystalline.Because especially little, high-strength, the Gao Mo of its density, good shock-absorbing performance, performances such as good resistance to impact, corrosion resistance make it have the prospect of extensive use in fields such as national defence, aviation and navigation, medical treatment.
To be the seventies in 20th century at first succeeded in developing by the Capaccio and the Ward of Leeds, England university superhigh molecular weight polyethylene fibers, and used at that time molecular weight of polyethylene has only 100,000.After this Dutch DSM N. V. utilizes decahydro how to make solvent and has invented gel spinning, has prepared the UHMWPE fiber, and has applied for patent in 1979, and nineteen ninety has been realized suitability for industrialized production.The Allied Signal of the U.S. (back merges with Honeywell, claims Honeywell company) has bought HOII P, and solvent has been changed into mineral oil, has declared the patent of oneself, has realized commercially producing in 1988 years.
Employing mineral oil is that the technological process of solvent is at present: ultra-high molecular weight polyethylene and solvent are mixed with uniform spinning solution, to dissolve after the spinning pack ejection in this solution feeding double screw extruder, enter quenching curing in the coagulating bath immediately, form the nascent gel spun fiber that contains a large amount of solvents.With extractant solvent extraction is come out again, the drying operation forms the dry freeze glue fiber, after multistage multistage hot-stretch obtains finished fiber, the dry gas that contains extractant that produces of extraction enters the organic gas retracting device, most of extractant is recovered the back and is utilizing, a small amount of extractant with toxic emission in atmosphere.In above-mentioned flow process, can produce toxic emission inevitably, thereby environment is polluted.
Proposing with the carrene in the Chinese patent 200710063815.4 is extractant, and drying equipment is divided into a plurality of zones of heating, and adopts the mode that progressively heats up.But this patent does not relate to the circulation heating recovery uses the reverse flow mode of heated air.
Propose to adopt the hot blast forced circulation in the Chinese patent 200810034218.3, improve drying efficiency.But this patent does not relate to multilevel drying, does not relate to the circulation heating recovery yet and uses the reverse flow mode of heated air.
Summary of the invention
In order to overcome the drying process above shortcomings of existing superhigh molecular weight polyethylene fibers, the purpose of the invention provides the drying means of the superhigh molecular weight polyethylene fibers of a kind of production technology advantages of simple, energy utilization rate height, non-exhaust emission.
The invention solves the technical scheme that its technical problem adopts, described preparation process of ultrahigh molecular weight polyethylene fiber comprises: the ultra-high molecular weight polyethylene powder mixes, dissolves the back and solidifies formation frozen glue precursor from spinneret orifice ejection quenching with white oil, then the frozen glue precursor is removed mineral oil through extraction, strand drying technology after the extraction is removed extractant, after a multistage super times drawing-off obtains finished fiber.Described drying process comprises drying equipment, gas concentration unit and gas drying treating apparatus, drying equipment is composed in series by two-stage or the above drying box of two-stage, adopt pipeline or passage to connect between the adjacent drying box, drying box inner drying gas flow direction is opposite with the fibre bundle direction of motion.
Described every grade of drying box is equipped with heat exchanger, and heat exchanger is used for controlling the temperature of every grade of drying box dry gas.
The dry gas of described gas drying treating apparatus enters, sends the recovery gas that contains extractant from first order drying box from the afterbody drying box, and the recovery gas that contains extractant enters gas concentration unit.
Described gas concentration unit isolated extractant from reclaim gas is got back to the extractant storage tank, and the recovery gas after the processing is got back to the gas drying treating apparatus and recycled.
Described gas concentration unit is the activated carbon fiber organic waste gas treatment device.
After adopting said method, following advantage or effect are arranged compared with the prior art:
1. the gas that contains extractant in the prior art directly is discharged in the atmosphere after gas concentration unit is handled, therefore gas concentration unit can not reach 100% recovery to the recovery of extractant, have a small amount of extractant with toxic emission in atmosphere, will produce pollution to atmosphere.The invention drying equipment adopts multilevel drying case series system, in the dried recovered system that forms by drying boxes at different levels, gas concentration unit and gas drying treating apparatus, dry gas forms closed loop, thereby realizes the waste gas zero-emission, has reduced environmental pollution effectively.
2. the multilevel drying case adopts series system in the invention, the flow direction of heated air is opposite with the fibre bundle direction of motion, when dry gas after be inhaled in the prime drying box after finishing dry run in the one-level drying box tow carried out drying, enter the technology of fresh air simultaneously with respect to every grade of drying box, the one, save the energy: the dry gas in the prime drying box is the heated gas of back level, thereby avoids reheating fresh air.The 2nd, improve Gas Recovery efficient: if guarantee under the certain situation of the air quantity of every grade of drying, adopt gas flow pattern provided by the invention will reduce the total blast volume that enters gas concentration unit exponentially, improve the extractant gas concentration that enters gas concentration unit, concerning adopting activated carbon fiber to carry out improving the air intake gas concentration and reducing air quantity and will improve organic efficiency effectively the retracting device of adsorption treatment.
3. drying boxes at different levels are equipped with heat exchanger in the invention, can realize heating or cooling to dry gas, thereby the temperature that guarantees dry gas meets technological requirement.
4. because gas concentration unit adopts activated carbon fiber to recycle, reclaim in the gas and contain moisture, the gas drying treating apparatus can carry out dried to it to this part gas before entering drying equipment.
Description of drawings
Fig. 1 is the process flow diagram of first kind of scheme of the invention.
Fig. 2 is the process flow diagram of second kind of scheme of the invention.
The specific embodiment
Shown in Figure 1, first kind of specific embodiments for the drying means of a kind of superhigh molecular weight polyethylene fibers of the invention, described preparation process of ultrahigh molecular weight polyethylene fiber comprises: the ultra-high molecular weight polyethylene powder mixes, dissolves the back and solidifies formation frozen glue precursor from spinneret orifice ejection quenching with white oil, then the frozen glue precursor is removed mineral oil through extraction, strand drying technology after the extraction is removed extractant, after a multistage super times drawing-off obtains finished fiber.Described drying process comprises drying equipment, gas concentration unit 2 and gas drying treating apparatus 3, drying equipment is composed in series by firsts and seconds drying box 5,7, adopt pipeline or passage to connect between the firsts and seconds drying box 5,7, firsts and seconds drying box 5,7 inner drying gas flow directions are opposite with fibre bundle 4 directions of motion.Described firsts and seconds drying box 5,7 correspondences are provided with heat exchanger 6,8, and heat exchanger 6,8 is used for controlling the temperature of firsts and seconds drying box 5,7 dry gas.The dry gas of described gas drying treating apparatus 3 enters in the secondary drying case 7 by heat exchanger 8, sends the recovery gas that contains extractant from one-level drying box 5, and the recovery gas that contains extractant enters gas concentration unit 2.Described gas concentration unit 2 isolated extractant from reclaim gas is got back to extractant storage tank 1, and the recovery gas after the processing is got back to gas drying treating apparatus 3 and recycled.Described gas concentration unit 2 is the activated carbon fiber organic waste gas treatment device.
One-level drying box 5 and secondary drying case 7 have the function of heating and cooling and drying gas simultaneously because correspondence is provided with heat exchanger 6,8, can make the temperature of dry gas reach the technique initialization requirement.The dry gas of gas drying treating apparatus 3 at first enters in the secondary drying case 7 by heat exchanger 8, the temperature of secondary drying case 7 is controlled at about 40 ℃, behind the dried fibres tow 4, the gas that has extractant is sent into the air inlet of one-level drying box 5 by pipeline or passage, undertaken sending into one-level drying box 5 after the heat exchange by heat exchanger 6, the temperature of control one-level drying box 5 is controlled at about 30 ℃, the gas that has extractant in the one-level drying box 5 is admitted to gas concentration unit 2, suction by gas concentration unit 2, desorption adsorbs extractant, reclaim, the liquid extractant in recovery back enters extractant storage tank 1 and recycles, the recovery gas that removes most of extractant is not to adopt traditional direct discharging, but recycle through sending into once more in the secondary drying case 7 after gas drying treating apparatus 3 dried, avoided the emptying of waste gas.Because the dry gas of one-level drying box 5 is the heated gas that has extractant in the secondary drying case 7, therefore a small amount of heating of 5 need of one-level drying box just can reach temperature requirement, when environment temperature is 25 ℃, all advance the device of new wind compares with tradition, the heating energy source consumption is saved more than 10%, realized the waste gas zero-emission, effectively reduced and have of the pollution of extractant gas air.
Shown in Figure 2, second kind of specific embodiments for the drying means of a kind of superhigh molecular weight polyethylene fibers of the invention, with first kind of specific embodiments difference is to adopt the three-stage drying mode, it is one-level drying box 5, adopt pipeline or passage to be connected in series between secondary drying case 7 and the three-stage drying case 9, and correspondence is provided with heat exchanger 6,8,10, the dry gas of gas drying treating apparatus 3 at first enters in the three-stage drying case 9 by heat exchanger 10, one-level, secondary and three-stage drying case 5,7,9 temperature correspondence is controlled at 25 ℃, 30 ℃, about 40 ℃, all the other are identical with first kind of specific embodiments.When environment temperature is 25 ℃, all advance the device of new wind with tradition and compare, the heating energy source consumption has been saved more than 15%.
More than be the preferred embodiment of the invention, therefore all equivalences of doing according to the spirit of the invention change and modify, and still belong to coverage of the present invention.
Claims (5)
1. the drying means of a superhigh molecular weight polyethylene fibers, described preparation process of ultrahigh molecular weight polyethylene fiber comprises: the ultra-high molecular weight polyethylene powder mixes with white oil, the dissolving back is solidified from spinneret orifice ejection quenching and is formed the frozen glue precursor, then the frozen glue precursor is removed mineral oil through extraction, strand drying technology after the extraction is removed extractant, after a multistage super times drawing-off obtains finished fiber, it is characterized in that: described drying process comprises drying equipment, gas concentration unit and gas drying treating apparatus, drying equipment is composed in series by two-stage or the above drying box of two-stage, adopt pipeline or passage to connect between the adjacent drying box, drying box inner drying gas flow direction is opposite with the fibre bundle direction of motion.
2. the drying means of superhigh molecular weight polyethylene fibers according to claim 1, it is characterized in that: described every grade of drying box is equipped with heat exchanger, and heat exchanger is used for controlling the temperature of every grade of drying box dry gas.
3. the drying means of superhigh molecular weight polyethylene fibers according to claim 1 and 2, it is characterized in that: the dry gas of described gas drying treating apparatus enters, sends the recovery gas that contains extractant from first order drying box from the afterbody drying box, and the recovery gas that contains extractant enters gas concentration unit.
4. the drying means of superhigh molecular weight polyethylene fibers according to claim 3, it is characterized in that: described gas concentration unit isolated extractant from reclaim gas is got back to the extractant storage tank, and the recovery gas after the processing is got back to the gas drying treating apparatus and recycled.
5. the drying means of superhigh molecular weight polyethylene fibers according to claim 4, it is characterized in that: described gas concentration unit is the activated carbon fiber organic waste gas treatment device.
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| CN 201010508194 CN101984155A (en) | 2010-10-11 | 2010-10-11 | Method for drying ultra-high molecular weight polyethylene fibers |
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| CN 201010508194 CN101984155A (en) | 2010-10-11 | 2010-10-11 | Method for drying ultra-high molecular weight polyethylene fibers |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866425A (en) * | 2014-03-06 | 2014-06-18 | 江苏九九久科技股份有限公司 | Solvent used by jelly spinning method in preparation of ultra-high-molecular-weight polyethylene fiber |
| CN104483998A (en) * | 2014-11-19 | 2015-04-01 | 四川辉腾科技有限公司 | Spinning pulp temperature control system |
| CN111254523A (en) * | 2020-03-09 | 2020-06-09 | 江苏九九久科技有限公司 | Extraction method for fiber production |
| CN111375272A (en) * | 2018-12-27 | 2020-07-07 | 北京同益中新材料科技股份有限公司 | VOCs tail gas recycling system and polyethylene fiber production equipment |
| CN112342646A (en) * | 2019-08-06 | 2021-02-09 | 江苏九九久科技有限公司 | Carrier gas circulation and solvent recovery method in high-strength high-modulus polyethylene fiber extraction and drying processes |
| CN113122943A (en) * | 2021-05-10 | 2021-07-16 | 无锡华翔化纤有限公司 | Uniform cooling and drying device for chemical fiber spinning |
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| JPS61231211A (en) * | 1985-04-02 | 1986-10-15 | Asahi Chem Ind Co Ltd | Production of high-strength polyethylene fiber |
| US5230854A (en) * | 1991-12-09 | 1993-07-27 | Allied-Signal Inc. | Method for removal of spinning solvent from spun fiber |
| CN101029422A (en) * | 2007-02-12 | 2007-09-05 | 北京特斯顿新材料技术发展有限公司 | Method for drying extractant during production of superhigh-molecular weight polyvinyl fibre |
| CN101135069A (en) * | 2007-09-29 | 2008-03-05 | 盐城市宏达纺织器材有限公司 | High-modulus high-strength polyvinyl fibre abstraction drafting production line |
| CN101270955A (en) * | 2008-05-07 | 2008-09-24 | 张家港保税区万盛机械工业有限公司 | Continuous drier suitable for high retraction polyester chip and fabrication technique thereof |
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2010
- 2010-10-11 CN CN 201010508194 patent/CN101984155A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61231211A (en) * | 1985-04-02 | 1986-10-15 | Asahi Chem Ind Co Ltd | Production of high-strength polyethylene fiber |
| US5230854A (en) * | 1991-12-09 | 1993-07-27 | Allied-Signal Inc. | Method for removal of spinning solvent from spun fiber |
| CN101029422A (en) * | 2007-02-12 | 2007-09-05 | 北京特斯顿新材料技术发展有限公司 | Method for drying extractant during production of superhigh-molecular weight polyvinyl fibre |
| CN101135069A (en) * | 2007-09-29 | 2008-03-05 | 盐城市宏达纺织器材有限公司 | High-modulus high-strength polyvinyl fibre abstraction drafting production line |
| CN101270955A (en) * | 2008-05-07 | 2008-09-24 | 张家港保税区万盛机械工业有限公司 | Continuous drier suitable for high retraction polyester chip and fabrication technique thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103866425A (en) * | 2014-03-06 | 2014-06-18 | 江苏九九久科技股份有限公司 | Solvent used by jelly spinning method in preparation of ultra-high-molecular-weight polyethylene fiber |
| CN104483998A (en) * | 2014-11-19 | 2015-04-01 | 四川辉腾科技有限公司 | Spinning pulp temperature control system |
| CN111375272A (en) * | 2018-12-27 | 2020-07-07 | 北京同益中新材料科技股份有限公司 | VOCs tail gas recycling system and polyethylene fiber production equipment |
| CN112342646A (en) * | 2019-08-06 | 2021-02-09 | 江苏九九久科技有限公司 | Carrier gas circulation and solvent recovery method in high-strength high-modulus polyethylene fiber extraction and drying processes |
| CN111254523A (en) * | 2020-03-09 | 2020-06-09 | 江苏九九久科技有限公司 | Extraction method for fiber production |
| CN113122943A (en) * | 2021-05-10 | 2021-07-16 | 无锡华翔化纤有限公司 | Uniform cooling and drying device for chemical fiber spinning |
| CN113122943B (en) * | 2021-05-10 | 2023-02-03 | 无锡华翔化纤有限公司 | Uniform cooling and drying device for chemical fiber spinning |
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Free format text: CORRECT: ADDRESS; FROM: 321300 JINHUA, ZHEJIANG PROVINCE TO: 610300 CHENGDU, SICHUAN PROVINCE Free format text: CORRECT: INVENTOR; FROM: YAO XIANGJIANG TO: LI SHENGZHUO |
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Effective date of registration: 20111104 Address after: 610300 Sichuan Province, Chengdu city Qingbaijiang District Long Shi Jia Nian road 132, 2 Building 2 unit 17 Applicant after: Li Shengchao Address before: Brand global industrial park ten 321300 in Zhejiang city of Yongkang province Zhejiang Qianxi Industry Co. Ltd. Applicant before: Zhejiang Qianxilong Special Fibre Co., Ltd. |
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Application publication date: 20110309 |