CN102241812B - Crystallizing and drying process of industrial wire slice - Google Patents
Crystallizing and drying process of industrial wire slice Download PDFInfo
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- CN102241812B CN102241812B CN201110117596XA CN201110117596A CN102241812B CN 102241812 B CN102241812 B CN 102241812B CN 201110117596X A CN201110117596X A CN 201110117596XA CN 201110117596 A CN201110117596 A CN 201110117596A CN 102241812 B CN102241812 B CN 102241812B
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Abstract
The invention relates to a crystallizing and drying process of an industrial wire slice and belongs to the field of chemical fiber production methods. The crystallizing and drying process is characterized in that a fluidized-bed-type pre-crystallizer and a stirring-type crystallizer are utilized, a second rotary valve is additionally arranged so as to be used for controlling the cutting speed, a third rotary valve is used for isolating an air system and a nitrogen gas system, materials are continuously added into the pre-crystallizer by virtue of utilizing height difference, the slice is crystallized in the continuous fluidized-bed-type pre-crystallizer, the slice crystallized to a certain crystallinity is continuously added into the stirring-type crystallizer for further crystallization by virtue of potential difference, and the PET (polyethylene terephthalate) slice is heated to the solid-phase polymerization required temperature in a pre-heater and then introduced to a solid-phase polymerization tower for solid-phase polymerization, wherein both the pre-heating process for solid-phase polymerization and the drying process are performed in a nitrogen medium. The crystallizing and drying process has the advantages of high product yield, simple process and easiness for production control.
Description
Technical field
The present invention relates to section crystallization of industry silk and drying process, it belongs to the chemical fibre field of production.
Background technology
Polyester industrial fiber has HS, low elongation, high-modulus, the more high good characteristics of dry-hot shrinkage, is widely used in warp and hanging belt, safety belt for vehicle, travelling belt, coated fabric, the conveying belt parallel of tire and mechanical rubber item, tire cord and conveying belt, canvas etc.Can be divided into high-strength flatness type, high mould low shrinkage type, high intensity low shrinkage type and active form according to its performance.China is in the later stage eighties 20th century, spins from external introduction and leads associating single stage method polyester industrial fiber production line, gets into extensive developmental stage, and gets into Rapid development stage by 2005 in 2003.Expected for the end of the year 2010, production capacity will account for 42% of global aggregated capacity above 1,000,000 tons/year.China's existing subject matter of high-performance polyester industrial yarn industry has: single line throughput low (mostly single line production capacity less than 10000 tons/year), energy consumption is big, scope of the enterprise is less than normal and dispersion, cost are high.The imported unit investment in fixed assets is big, no independent intellectual property right.Kinds of processes develops simultaneously, and is main with technology introduction, and the independent development technology seldom.Kind is main with routine, concentrates on common high strength yarn mostly, and differentiation rate is lower.Different based on raw material, spinning process can be divided into Direct Spinning and section is spun, and can be divided into one-step method and two step method by technology path.Generally combine and be called the Direct Spinning single stage method, the Direct Spinning two step method, single stage method is spun in section, and two step method is spun in section.
The suitable extensive big variety production of Direct Spinning single stage method, reduced investment, product is stable, the saving energy consumption, and cost is low, but the level of management requirement is very high, and on the many kinds of short run, conversion is frequently limited to.That adopts at present Direct Spinning in the world has only the Allied Signal 110kt/ of company, and 10 kt/ of Hoechst Celanese company account for 21.31% of world's polyester industrial yarn YO altogether.Section is spun single stage method and is produced flexibly, and job change is convenient, manage easily, and good product quality, but investment is high slightly than the former.Adopt at present mostly this method, the PET industry silk output that this method is produced accounts for more than 65% of world's YO, and the two step method less employing of newly founding the factory is spun in Direct Spinning two step method and section, will progressively eliminate.
In technical process, its solid-phase tack producing device has two kinds of continous way and intermittent types, and the intermittent type product is stable, and flexibility is strong, is easy to additive and adds, and job change is flexible, but takes up an area of greatlyyer, and investment is high.The continous way reduced investment, take up an area of for a short time, be fit to raw materials enjoy stable sources, the enterprise that industrial scale is bigger.
The quality of section crystallization effect in mold not only influences the output of production line, and is determining that can production line ordinary production.If because section crystallization in mold gets inhomogeneous; Section will be built bridge in pre-heaters or solid-state polymerization tower or lump; If it is serious; The processing of will stopping, as in the flow process of Japanese Toray company solid state polymerization owing to there is not pre-crystallizer, so occur building bridge or caking phenomenon through regular meeting.
Summary of the invention
In view of the defective that prior art exists, the object of the present invention is to provide section crystallization of a kind of industry silk and drying process, output is high, technology is simple, produce the crystallizing and drying technology that is easy to control.
Section crystallization of industry silk and drying process; Process PET section-crystallization-crystallization in advance-preheat-solid polycondensation-dried section storage-spinning drawing-off winding process; Process using fluidized bed type pre-crystallizer and stirring-type mold; Increase by second turning valve and be used for controlling blanking velocity, the 3rd turning valve is used for air system and nitrogen system are isolated, and utilizes potential difference to join material in the pre-crystallizer continuously; Crystallization is carried out in section in continuous fluidized bed pre-crystallizer, crystallization utilizes potential difference to join continuously to the section of setting percent crystallinity to carry out further crystallization in the stirring-type mold; After control and the 3rd turning valve of section after the crystallization fully through second turning valve isolated air in the crystallisation process and following nitrogen system, the entering pre-heaters; The PET section that enters into pre-heaters relies on potential difference to enter into solid-state polymerization tower continuously after the hot nitrogen medium is heated to the desired temperature of solid state polymerization gradually; The PET section that enters into solid-state polymerization tower is at the hot nitrogen medium, and design whipping appts in solid-state polymerization tower bottom when the limiting viscosity of section reaches processing requirement, contacts with cold nitrogen, makes the limiting viscosity of section be stabilized in the scope of processing requirement.PET section is heated to get in the solid-state polymerization tower continuously after the temperature of solid state polymerization requirement in pre-heaters carries out solid state polymerization, preheats solid state polymerization and drying process is all accomplished in nitrogen medium.Said the 3rd turning valve rotating speed: 1～30rpm isolates air system in crystallization and the drying process and nitrogen system.The crystallization hot blast temperature is 170 ℃ in advance, and crystallization time is 15-30min in advance, and the crystallization hot blast temperature is 170 ℃, and the heat of crystallization wind flow is 2800 Nm
3/ h; 200 ℃ of said preheating tower nitrogen inlet air temperature, preheating tower nitrogen charge flow rate 3200 Nm
3/ h, solid-state polymerization tower nitrogen inlet air temperature is 200 ℃, nitrogen inlet air flow 3300 Nm
3/ h.
After adopting such scheme; Compared with prior art have following beneficial effect: section crystallization of industry silk and drying process adopt fluidized bed type pre-crystallizer and stirring-type mold; Increase by second turning valve and be used for controlling blanking velocity; The 3rd turning valve is used for air system and nitrogen system are isolated; Utilize potential difference that material is joined in the pre-crystallizer continuously, crystallization is carried out in section in continuous fluidized bed pre-crystallizer, and crystallization utilizes potential difference to join continuously to the section of setting percent crystallinity to carry out further crystallization in the stirring-type mold; PET section is heated to get in the solid-state polymerization tower continuously after the temperature of solid state polymerization requirement in pre-heaters carries out solid state polymerization, preheats solid state polymerization and drying process is all accomplished in nitrogen medium.Output is high, technology is simple, production is easy to control.
Embodiment
To production capacity 60 tons/year Large Scale and Continuous solid state polymerization device and high-performance polyester industrial yarn technology and suite of equipment; Its section crystallization of industry silk and drying process; Process PET section-crystallization-crystallization in advance-preheat-solid polycondensation-dried section storage-spinning drawing-off winding process; Process using fluidized bed type pre-crystallizer and stirring-type mold; Increase by second turning valve and be used for controlling blanking velocity, the 3rd turning valve is used for air system and nitrogen system are isolated, and utilizes potential difference to join material in the pre-crystallizer continuously; Crystallization is carried out in section in continuous fluidized bed pre-crystallizer, crystallization utilizes potential difference to join continuously to the section of setting percent crystallinity to carry out further crystallization in the stirring-type mold; After control and the 3rd turning valve of section after the crystallization fully through second turning valve isolated air in the crystallisation process and following nitrogen system, the entering pre-heaters; The PET section that enters into pre-heaters relies on potential difference to enter into solid-state polymerization tower continuously after the hot nitrogen medium is heated to the desired temperature of solid state polymerization gradually; The PET section that enters into solid-state polymerization tower is at the hot nitrogen medium, and design whipping appts in solid-state polymerization tower bottom when the limiting viscosity of section reaches processing requirement, contacts with cold nitrogen, makes the limiting viscosity of section be stabilized in the scope of processing requirement.PET section is heated to get in the solid-state polymerization tower continuously after the temperature of solid state polymerization requirement in pre-heaters carries out solid state polymerization, preheats solid state polymerization and drying process is all accomplished in nitrogen medium.Said the 3rd turning valve rotating speed: 1～30rpm isolates air system in crystallization and the drying process and nitrogen system.The crystallization hot blast temperature is 170 ℃ in advance, and crystallization time is 15-30min in advance, and the crystallization hot blast temperature is 170 ℃, and the heat of crystallization wind flow is 2800 Nm
3/ h; 200 ℃ of said preheating tower nitrogen inlet air temperature, preheating tower nitrogen charge flow rate 3200 Nm
3/ h, solid-state polymerization tower nitrogen inlet air temperature is 200 ℃, nitrogen inlet air flow 3300 Nm
3/ h.
Conventional PET section is selected materials through vibratory screening apparatus and is got into wet section big material bin; PET section in the wet section big material bin is through delivering into the wet section small feed bin of 60 meters eminences, and control gets into and carries out crystallization in the pre-crystallizer PET section in the small feed bin continuously through first turning valve; Crystallization is controlled to get into continuously through the level gage of stirred type crystallizer to PET section to a certain degree and in nitrogen system, is carried out further crystallization in the stirred type crystallizer; (second turning valve is used for controlling blanking velocity through second, third turning valve in PET section after crystallization is accomplished; The 3rd turning valve is used for air system and nitrogen system are isolated) get into pre-heaters, the PET section is heated to get in the solid-state polymerization tower continuously after the temperature of solid state polymerization requirement in pre-heaters carries out solid state polymerization; Meet the requirements of tackify PET section and pass through gas delivery in finished product bin, all nitrogen medium, accomplish from preheating solid state polymerization.Output is high, technology is simple, production is easy to control.
Claims (4)
1. industrial silk section crystallization and drying process; Process PET section-crystallization-crystallization in advance-preheat-solid polycondensation-dried section storage-spinning drawing-off winding process; It is characterized in that: process using fluidized bed type pre-crystallizer and stirring-type mold; Increase by second turning valve control blanking velocity, the 3rd turning valve is used for air system and nitrogen system are isolated, and utilizes potential difference to join material in the pre-crystallizer continuously; Crystallization is carried out in section in continuous fluidized bed pre-crystallizer, crystallization utilizes potential difference to join continuously to the section of setting percent crystallinity to carry out further crystallization in the stirring-type mold; After control and the 3rd turning valve of section after the crystallization fully through second turning valve isolated air in the crystallisation process and following nitrogen system, the entering pre-heaters; The PET section that enters into pre-heaters relies on potential difference to enter into solid-state polymerization tower continuously after the hot nitrogen medium is heated to the desired temperature of solid state polymerization gradually; The PET section that enters into solid-state polymerization tower is at the hot nitrogen medium, and design whipping appts in solid-state polymerization tower bottom when the limiting viscosity of section reaches processing requirement, contacts with cold nitrogen, makes the limiting viscosity of section be stabilized in the scope of processing requirement.
2. based on claim 1 described industry silk section crystallization and drying process; It is characterized in that: PET section is heated to get in the solid-state polymerization tower continuously after the temperature of solid phase requirement in pre-heater carries out solid phase, preheats solid phase and drying process is all accomplished in nitrogen medium.
3. industry silk according to claim 1 section crystallization and drying process is characterized in that: said the 3rd turning valve rotating speed: 1～30rpm, isolate air system in crystallization and the drying process and nitrogen system.
4. industry silk according to claim 1 section crystallization and drying process is characterized in that: the crystallization hot blast temperature is 170 ℃ in advance, and crystallization time is 15～30min in advance, and the crystallization hot blast temperature is 170 ℃, and the heat of crystallization wind flow is 2800 Nm
3/ h; Preheating tower nitrogen inlet air temperature is 200 ℃, and preheating tower nitrogen charge flow rate is 3200 Nm
3/ h, solid-state polymerization tower nitrogen inlet air temperature is 200 ℃, the nitrogen inlet air flow is 3300 Nm
3/ h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110117596XA CN102241812B (en) | 2011-05-09 | 2011-05-09 | Crystallizing and drying process of industrial wire slice |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110117596XA CN102241812B (en) | 2011-05-09 | 2011-05-09 | Crystallizing and drying process of industrial wire slice |
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| Publication Number | Publication Date |
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| CN102241812A CN102241812A (en) | 2011-11-16 |
| CN102241812B true CN102241812B (en) | 2012-11-07 |
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| CN201110117596XA Expired - Fee Related CN102241812B (en) | 2011-05-09 | 2011-05-09 | Crystallizing and drying process of industrial wire slice |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109456466A (en) * | 2018-12-14 | 2019-03-12 | 浙江古纤道绿色纤维有限公司 | A kind of large capacity equipment of solid-state polycondensation |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668679B (en) * | 2013-12-18 | 2014-12-10 | 浙江铭龙基布有限公司 | Method for manufacturing base cloth in pool cloth |
| CN109593187B (en) * | 2018-12-14 | 2019-11-08 | 浙江古纤道绿色纤维有限公司 | A kind of large capacity solid phase polycondensation process |
| CN118082346A (en) * | 2024-04-23 | 2024-05-28 | 宁波长阳科技股份有限公司 | PCR-PET-based optical reflection film and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0712703A2 (en) * | 1994-11-21 | 1996-05-22 | Sinco Engineering S.P.A. | Process for the crystallization of polyester resins |
| CN1596274A (en) * | 2001-11-30 | 2005-03-16 | 齐默尔股份公司 | Method and apparatus for producing solid-state polycondensed polyesters |
| CN1978503A (en) * | 2006-11-28 | 2007-06-13 | 谭亦武 | Production process for manufacturing food-level polyester bottle flakes utilizing polyester recovered bottles |
-
2011
- 2011-05-09 CN CN201110117596XA patent/CN102241812B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0712703A2 (en) * | 1994-11-21 | 1996-05-22 | Sinco Engineering S.P.A. | Process for the crystallization of polyester resins |
| CN1596274A (en) * | 2001-11-30 | 2005-03-16 | 齐默尔股份公司 | Method and apparatus for producing solid-state polycondensed polyesters |
| CN1978503A (en) * | 2006-11-28 | 2007-06-13 | 谭亦武 | Production process for manufacturing food-level polyester bottle flakes utilizing polyester recovered bottles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109456466A (en) * | 2018-12-14 | 2019-03-12 | 浙江古纤道绿色纤维有限公司 | A kind of large capacity equipment of solid-state polycondensation |
| CN109456466B (en) * | 2018-12-14 | 2019-09-13 | 浙江古纤道绿色纤维有限公司 | A kind of large capacity equipment of solid-state polycondensation |
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| CN102241812A (en) | 2011-11-16 |
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