CN102538409A - Method and device for drying p-aramid polymer - Google Patents
Method and device for drying p-aramid polymer Download PDFInfo
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- CN102538409A CN102538409A CN2012100618630A CN201210061863A CN102538409A CN 102538409 A CN102538409 A CN 102538409A CN 2012100618630 A CN2012100618630 A CN 2012100618630A CN 201210061863 A CN201210061863 A CN 201210061863A CN 102538409 A CN102538409 A CN 102538409A
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Abstract
The invention discloses a method and a device for drying a p-aramid polymer. The method comprises the following steps of: introducing pre-dried p-aramid polymer powder of which water content is 5 to 7 percent into a high-level storage bin through a hoister, quantitatively and automatically introducing the p-aramid polymer powder into a vacuum tray type continuous dryer for drying through a conveyer connected between the high-level storage bin and the vacuum tray type continuous dryer, controlling the vacuum degree, the drying temperature, the drying time and the steam pressure of the vacuum tray type continuous dryer, introducing the material in the vacuum tray type continuous dryer into an automatic quantitative vacuum packing machine in a continuous state through a valve arranged between the vacuum tray type continuous dryer and the automatic quantitative vacuum packing machine, and thus obtaining the spinning p-aramid polymer of which water content is 1,000 to 2,000ppm. The method and the device have the advantages of improving the drying efficiency, saving energy and reducing the molecular weight and the moisture fluctuation of the polymer by continuous feeding and continuous discharge.
Description
Technical field
The present invention relates to the polymeric drying means of a kind of p-aramid fiber, and relate to the used device of this method.
Background technology
P-aramid fiber is also claimed Fanglun l414; (english abbreviation is its chemistry " PPTA " by name: PPTA); P-aramid fiber is high strength, high-modulus and resistant to elevated temperatures special material; By the intensity of its fiber that is processed into be steel wire 5-6 doubly, specific modulus be steel wire 2-3 doubly and anti-350 ℃ of high temperature, be widely used in fields such as space flight and aviation, traffic communication, chemical industry.China begins one's study during " six or five ", progressively begins until 2011 to get into 1000 tons/year industrialization stage.
The p-aramid fiber spinning has very high requirement to condensate, otherwise directly influences the quality and the stability of aramid fiber.Be embodied in following two aspects: the one, the polymeric molecular weight homogeneous of requirement; If the molecular weight distribution broad, and preceding a collection of condensate is inconsistent with a collection of polymeric molecular weight in back, and the condensate dissolution time also differs so; The easy degraded that molecular weight is low; The longer degraded of time that rests in the slurries is also fast more, thereby is difficult to obtain the good spinning slurry of homogeneity, finally influences the stability of fiber quality.The 2nd, the polymeric moisture content of requirement is consistent, it has been generally acknowledged that condensate moisture content is more little good more, and promptly condensate is dried more good more, and for example moisture content is lower than 0.05% for well, fluctuates but in suitability for industrialized production, often be difficult to reach and cause easily up and down.
The polymeric drying means of domestic p-aramid fiber generally adopts convection oven drying, pneumatic conveying drying or taper rotation vacuum drying etc., and these drying means all belong to intermittently drying method category.The intermittently drying drying time reaches 8-12 hour; Simultaneously small scale, batch is little and energy consumption is big; It is big that the p-aramid fiber condensate of producing often criticizes and make molecular weight distribution broad, water content to fluctuate through overmulling; Spinning technique be difficult to adapt to these fluctuations, usually occurs that the condensate degraded is serious, head is many, lousiness is many, low or the like the production wild effect of gloss difference, tensile strength.Therefore intermittently drying far can not satisfy the requirement that the p-aramid fiber heavy industrialization is given birth to.
The applicant has done literature search; Yet in disclosed China and foreign countries patent and non-patent literature, all be not seen in the teachings of the shortcoming that is able to eliminate aforementioned intermittently drying; The applicant has done positive and useful exploration and trial for this reason, and the technical scheme that will introduce below produces under this background.
Summary of the invention
Top priority of the present invention is to provide a kind of and helps to shorten drying time, helps energy efficient, is of value to the polymeric drying means of p-aramid fiber that significantly reduces polymer molecule amount and moisture content fluctuation.
Another task of the present invention is to provide the polymeric drying means of a kind of p-aramid fiber used device, and this apparatus structure is terse and can ensure comprehensive embodiment of the said technique effect of the polymeric drying means of said p-aramid fiber.
Top priority of the present invention is accomplished like this; The polymeric drying means of a kind of p-aramid fiber; It is to be that the p-aramid fiber condensate powder of 5-7% is introduced in the high-order storage bin through elevator with pre-dried and moisture content; Automatically introduce vacuum disc type continuous drier drying quantitatively through the conveyer that is connected between high-order storage bin and the vacuum disc type continuous drier again; The steam pressure of the vacuum of control vacuum disc type continuous drier, baking temperature, drying time and control vacuum disc type continuous drier; Meanwhile; Valve through being equipped between vacuum disc type continuous drier and the vacuum automatic quantitative packing machine is introduced the vacuum automatic quantitative packing machine with the material in the vacuum disc type continuous drier with continuous state, and obtaining moisture content is the p-aramid fiber condensate that is used to supply the spinning use of 1000-2000ppm.
In a concrete embodiment of the present invention, the vacuum of described control vacuum disc type continuous drier be vacuum degree control is-0.09～-0.1MPa; Described control baking temperature is that baking temperature is controlled to be 120-230 ℃; Described control drying time is with being controlled to be 240-300min drying time; The steam pressure of described control vacuum disc type continuous drier is that steam pressure is controlled to be 0.3-0.6MPa.
Another task of the present invention is accomplished like this; The device that the polymeric drying means of a kind of p-aramid fiber is used; Comprise elevator, high-order storage bin, conveyer, vacuum disc type continuous drier, valve, vacuum automatic quantitative packing machine and vacuum device; Elevator is followed in high-order storage bin; Conveyer is connected between the charging aperture of discharging opening and vacuum disc type continuous drier of high-order storage bin, and valve is connected between the discharging opening and vacuum automatic quantitative packing machine of vacuum disc type continuous drier, and vacuum device is connected with vacuum disc type continuous drier.
In another concrete embodiment of the present invention, described conveyer is a bidentate wheel conveyer.
In another concrete embodiment of the present invention, described elevator is vacuum feeding machine, helical-ribbon type conveyer or slat conveyer.
Also have among the concrete embodiment of the present invention, described valve is the wear-resistant ceramic valve.
more of the present invention and among concrete embodiment, described vacuum device comprises vavuum pump, surge tank and condenser, surge tank is connected between vavuum pump and the condenser, and condenser is connected with said vacuum disc type continuous drier.
Technical scheme provided by the invention makes material dry under vacuum state through vacuum disc type continuous drier; And by valve the material of drying is introduced the vacuum automatic quantitative packing machine with continuous state, use and improve drying efficiency, energy savings and reduce the polymer molecule amount and the moisture content fluctuation with continuous discharging thereby can embody continuous feed.
Description of drawings
Fig. 1 is the used schematic representation of apparatus of the inventive method.
The specific embodiment
Ask for an interview Fig. 1; By conveying capacity is 150-200kg/ hour and to be preferably 200kg/ hour the elevator of being filled the post of by vacuum feeding machine 1, helical-ribbon type conveyer or slat conveyer be the high-order storage bin 2 that the p-aramid fiber condensate powder of 5-7% is introduced taper with pre-dry and moisture content; The volume of high-order storage bin 2 is 500-1000L; In high-order storage bin 2, be furnished with 5-10n/min (being preferably 10n/min) agitator and the pneumatic hammer that knocks; The high-order storage bin 2 of this structure can be by the market channel acquisition; For example preferably but not definitely use model to be CQW-A type storage bin by the production and sales of the fashionable machine-building of Jiangsu Province, China Changzhou Co., Ltd with being limited to; The p-aramid fiber condensate powder that enters in the high-order storage bin 2 is taken turns conveyor delivery to vacuum disc type continuous drier 3 inner dryings through the bidentate that is connected between high-order storage bin 2 and the vacuum disc type continuous drier 3, and the diameter of vacuum disc type continuous drier 3 is 1800-3000mm (being preferably 2400mm), and the heating plate number of plies is the 10-20 layer; Be preferably 15 layers, drying area is 30-60m
2, be preferably 45m
2, the height of the revolution rake leaf through adjustment vacuum disc type continuous drier 3 is controlled the thickness of p-aramid fiber condensate material, and common thickness is 10-30mm, is preferably 20mm.The rotating speed of the main shaft of vacuum disc type continuous drier is preferably 1-10n/min; Be preferably 8n/min, in the dry process of vacuum disc type continuous drier, by vacuum device 7 to its be evacuated to-0.09～-0.1MPa; Be preferably-0.09MPa; Baking temperature is controlled to be 120-230 ℃, and be 240-300min drying time, and steam pressure is controlled to be 0.3～0.6MPa.The vacuum disc type continuous drier 3 preferred drying machines of producing by your drying equipment Co., Ltd of Jiangsu Province, China Changzhou benefit that adopt.In vacuum disc type continuous drier 3 dryings; Through connect the discharging opening of vacuum disc type continuous drier 3 and the valve 5 between the vacuum automatic quantitative packing machine 6 (wear-resistant ceramic valve) with drying and moisture content be that the p-aramid fiber condensate of 1000-2000ppm is introduced the vacuum automatic quantitative packing machine, be used for spinning.Aforesaid vacuum device 7 is made up of vavuum pump 71, surge tank 72 and condenser 73, and wherein surge tank 72 is connected between vavuum pump 71 and the condenser 73 through pipeline, and condenser 73 is connected with vacuum disc type continuous drier and surge tank 72 through pipeline.
Because vacuum tray drier heat exchange area is big; The uniform in thickness of physics material; Simultaneously can constantly stir material, it is heated evenly reach the fast purpose of heat transfer rate, solve the problem that drying time is long, energy consumption is big in the p-aramid fiber condensate dry run.Adopt material continuous drying technology, solved polymer molecule amount and the big problem of moisture content fluctuation in the dry run intermittently drying process, for the p-aramid fiber spinning is laid a good foundation.
Embodiment 1:
Embodiment 2:
Embodiment 3:
The result that the promptly dry p-aramid fiber condensate that is obtained by the foregoing description 1-3 is put into spinning is by shown in the following table:
Claims (7)
1.
polymeric drying means of a kind of p-aramid fiber; It is characterized in that it is is that the p-aramid fiber condensate powder of 5-7% is introduced in the high-order storage bin through elevator with pre-dried and moisture content; Automatically introduce vacuum disc type continuous drier drying quantitatively through the conveyer that is connected between high-order storage bin and the vacuum disc type continuous drier again; The steam pressure of the vacuum of control vacuum disc type continuous drier, baking temperature, drying time and control vacuum disc type continuous drier; Meanwhile; Valve through being equipped between vacuum disc type continuous drier and the vacuum automatic quantitative packing machine is introduced the vacuum automatic quantitative packing machine with the material in the vacuum disc type continuous drier with continuous state, and obtaining moisture content is the p-aramid fiber condensate that is used to supply the spinning use of 1000-2000ppm.
2.
polymeric drying means of p-aramid fiber according to claim 1, the vacuum that it is characterized in that described control vacuum disc type continuous drier be vacuum degree control is-0.09～-0.1MPa; Described control baking temperature is that baking temperature is controlled to be 120-230 ℃; Described control drying time is with being controlled to be 240-300min drying time; The steam pressure of described control vacuum disc type continuous drier is that steam pressure is controlled to be 0.3-0.6MPa.
3. the used device of
the polymeric drying means of a kind of p-aramid fiber as claimed in claim 1; It is characterized in that comprising elevator, high-order storage bin, conveyer, vacuum disc type continuous drier, valve, vacuum automatic quantitative packing machine and vacuum device; Elevator is followed in high-order storage bin; Conveyer is connected between the charging aperture of discharging opening and vacuum disc type continuous drier of high-order storage bin; Valve is connected between the discharging opening and vacuum automatic quantitative packing machine of vacuum disc type continuous drier, and vacuum device is connected with vacuum disc type continuous drier.
4.
used device of the polymeric drying means of p-aramid fiber according to claim 3 is characterized in that described conveyer is a bidentate wheel conveyer.
5.
used device of the polymeric drying means of p-aramid fiber according to claim 3 is characterized in that described elevator is vacuum feeding machine, helical-ribbon type conveyer or slat conveyer.
6.
used device of the polymeric drying means of p-aramid fiber according to claim 3 is characterized in that described valve is the wear-resistant ceramic valve.
7.
The device that the polymeric drying means of p-aramid fiber according to claim 1 is used; It is characterized in that described vacuum device comprises vavuum pump, surge tank and condenser; Surge tank is connected between vavuum pump and the condenser, and condenser is connected with said vacuum disc type continuous drier
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| CN2012100618630A CN102538409A (en) | 2012-03-10 | 2012-03-10 | Method and device for drying p-aramid polymer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019642A (en) * | 2014-06-10 | 2014-09-03 | 张家港市杨舍丝印工艺厂 | Steam heating type drying device |
| CN104019637A (en) * | 2014-06-10 | 2014-09-03 | 张家港市杨舍丝印工艺厂 | Steam heating type drying device and drying technology thereof |
| CN104019638A (en) * | 2014-06-10 | 2014-09-03 | 张家港市杨舍丝印工艺厂 | Steam heating type drying device and drying technology thereof |
| CN104072760A (en) * | 2013-03-28 | 2014-10-01 | 中国石油化工股份有限公司 | System for continuous poly(para-phenylene terephthanlamide) powder drying and grading, and method |
| CN107367129A (en) * | 2017-06-08 | 2017-11-21 | 江苏瑞盛新材料科技有限公司 | The polymeric continuous vacuum drying method of p-aramid fiber and its device |
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| GB479090A (en) * | 1936-07-30 | 1938-01-31 | George William Riley | Improvements in or relating to processes and apparatus for drying granular or powdered materials |
| CN2304087Y (en) * | 1997-08-13 | 1999-01-13 | 李振华 | Continuous vacuum drying apparatus |
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| CN201331244Y (en) * | 2008-12-30 | 2009-10-21 | 上海敏杰机械有限公司 | Full-automatic continuous vacuum dryer |
| CN101957125A (en) * | 2009-07-15 | 2011-01-26 | 朱玉玲 | Multiple-effect vacuum continuous drying equipment |
| CN102167816A (en) * | 2011-01-24 | 2011-08-31 | 北京国能新兴化工科技发展有限公司 | Method for preparing poly(p-phenylene terephthalamide) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB479090A (en) * | 1936-07-30 | 1938-01-31 | George William Riley | Improvements in or relating to processes and apparatus for drying granular or powdered materials |
| CN2304087Y (en) * | 1997-08-13 | 1999-01-13 | 李振华 | Continuous vacuum drying apparatus |
| CN2754629Y (en) * | 2004-09-04 | 2006-02-01 | 常州市范群干燥设备有限公司 | Host computer of cream material vacuum drier |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104072760A (en) * | 2013-03-28 | 2014-10-01 | 中国石油化工股份有限公司 | System for continuous poly(para-phenylene terephthanlamide) powder drying and grading, and method |
| CN104072760B (en) * | 2013-03-28 | 2016-09-14 | 中国石化仪征化纤有限责任公司 | A kind of PPTA powder body is carried out continuously and is dried and the system and method for classification |
| CN104019642A (en) * | 2014-06-10 | 2014-09-03 | 张家港市杨舍丝印工艺厂 | Steam heating type drying device |
| CN104019637A (en) * | 2014-06-10 | 2014-09-03 | 张家港市杨舍丝印工艺厂 | Steam heating type drying device and drying technology thereof |
| CN104019638A (en) * | 2014-06-10 | 2014-09-03 | 张家港市杨舍丝印工艺厂 | Steam heating type drying device and drying technology thereof |
| CN107367129A (en) * | 2017-06-08 | 2017-11-21 | 江苏瑞盛新材料科技有限公司 | The polymeric continuous vacuum drying method of p-aramid fiber and its device |
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Application publication date: 20120704 |