CN101704935B - System for cleaning polymeric kettle - Google Patents
System for cleaning polymeric kettle Download PDFInfo
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- CN101704935B CN101704935B CN2009101545777A CN200910154577A CN101704935B CN 101704935 B CN101704935 B CN 101704935B CN 2009101545777 A CN2009101545777 A CN 2009101545777A CN 200910154577 A CN200910154577 A CN 200910154577A CN 101704935 B CN101704935 B CN 101704935B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Polyurethanes Or Polyureas (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention provides a process and a device for cleaning a polymeric kettle. The process and the device are characterized in that: firstly, as a solvent preheating kettle is arranged in an overall polymerization plant, a solvent is preheated to a preset cleaning temperature to save the heating time of the solvent in a reactor; secondly, the cleaning procedures are recombined, namely a first reactor (pre-polymerization) and a second reactor (polymerization) are cleaned separately in a staggered time mode to reduce the cleaning time; thirdly, in the polymerization process of the second reactor, the cooling aggregation time in the second reactor is shortened to improve the aggregation efficiency by reducing the temperature of a coolant; and simultaneously, by increasing the rotating speed of a variable-frequency motor of a transfer pump of the second reactor, the polymer flow and the pressure in the second reactor are increased, the polymer transfer time in the second reactor is shortened, the polymer stock solution supply influenced by the cleaning is completely replenished, and the control standard of the resting period and the quality of a spinning solution are ensured. Compared with the prior art, the process and the device achieve the cleaning of the reactor without stopping spinning, lifting, and reducing the yield and the product quality, thereby greatly improving the production efficiency and the economic benefits.
Description
Technical field
The present invention relates to the manufacturing technology and the equipment of spandex, be specially a kind of technology and device that urethane dry-spinning polymeric kettle cleans that be used for.
Background technology
Spandex softness and high resilience is not only next to the shin but also do not have restraint feeling when wearing has good wear behavior. be subjected to human consumer's welcome deeply.In recent years, spandex not only is used for field of textiles, also is applied to fields such as industry, medical treatment, physical culture, and Application Areas constantly enlarges, output also constantly increases.The raw material of spandex---urethane all is segmented copolymer, and its building-up process is generally finished in two steps at present.The first step is prepolymerization, promptly with polyethers or polyester and aromatic diisocyanate reaction, generates the performed polymer that isocyanate group (NCO) contained at the molecule two ends.Second step adopted chainextender and prepolymer to continue reaction, and the generation relative molecular mass is 20000～50000 linear block polymers of polyurethane, polymkeric substance via pipe-line transportation to spinning.Poly-unit is mainly supplied with groove and pump group etc. by melting chamber, feed sump, auxiliary material tempering tank, first reactor (pre-polymerization), second reactor (polymerization), stoste tempering tank, stoste and is formed.
Reactor uses for some time, and polymer residue increases on still wall and the agitator, can cause that strainer pressure increases rapidly, and the spinning doubling increases, and top-quality product rate reduces, and the waste silk waste liquid increases, and output descends, even can not ordinary production.Therefore, polyurethane polyureas is incorporated into the necessary cleaning reaction device of some cycles.Yet the solvent cleaning method that adopts needs to add processes such as solvent, intensification, insulation cleaning and solvent removal usually, and triplicate is to dissolve and to clear the pollution off.Not only required time is longer to clean once reactor, influences spandex output, and will produce a large amount of waste liquids and waste silk, directly influences the business economic benefit.
Summary of the invention
The technology and the device that provide a kind of polymeric kettle that does not influence spandex output and quality to clean are provided at the deficiencies in the prior art.The invention is characterized in has increased the solvent still preheater in whole poly-unit, will be preheating to the cleaning design temperature, saves the heat-up time of solvent in reactor; Secondly, reconfigure wash procedure, adopt first reactor (pre-polymerization) and second reactor (polymerization) the independent cleaning way of staggering the time, reduce and clean the used time; In addition, in the polymerization process of second reactor,, shorten the cooling polymerization time in second reactor, improve polymerization efficiency by reducing refrigerant temperature; Simultaneously, by increasing the transferpump variable-frequency motor rotating speed of second reactor, increase polymer flow rate and pressure in second reactor, lower the polymkeric substance handover time in second reactor, supply the amount polishing with cleaning the polymer dope that is influenced, and guarantee the shelf-time control criterion, guarantee the quality of spinning solution.
Solvent still preheater of the present invention is that stainless steel is vertical, band heating jacket reactor, and requiring total volume is 0.5～5M
3, solvent is come from refining directly the conveying with pipeline.The solvent primary heater unit by pipeline respectively with first reactor with link to each other with second reactor.
Solvent of the present invention is: dimethyl formamide (DMF), N,N-DIMETHYLACETAMIDE (DMAC), dimethyl sulfoxide (DMSO) (DMSO).
Solvent preheating temperature of the present invention is: 100～130 ℃.
Wash procedure of the present invention is: the solvent that adds preheating earlier carries out the cleaning of first reactor, after for some time is cleaned in insulation, adds the solvent of preheating again in second reactor, begins the second reactor wash procedure.
The solvent time that adds preheating in second reactor of the present invention is after 50～180min is cleaned in the insulation of first reactor.
Refrigerant temperature of the present invention is reduced to 8～50 ℃.
The transferpump variable-frequency motor rotating speed of second reactor of the present invention is 40～70n/min, and polymer flow rate is 70～90L/min.
Compared with prior art, the present invention has realized the cleaning reaction device and spinning is not stopped, do not carry the position, and output does not reduce, and product quality does not reduce, and has improved production efficiency and economic benefit greatly.
Description of drawings
The process flow diagram that Fig. 1 cleans for polymeric kettle of the present invention.
Fig. 2 cleans the sequential synoptic diagram for polymeric kettle of the present invention.
Embodiment
Further narrate the present invention below in conjunction with embodiment and accompanying drawing thereof.Specific embodiment does not constitute the restriction to claim of the present invention just in order to further specify the present invention.
Embodiment 1:
Increase a solvent US still preheater in whole poly-unit, this device is stainless steel vertical response still, band heating jacket device, and requiring total volume is 1.2M
3, US comes from refining directly the conveying with pipeline, the US primary heater unit by pipeline respectively at two reactors link to each other (seeing accompanying drawing 1).Before the cleaning, US is preheating to 120 ℃ of cleaning temperatures with the solvent still preheater.In cleaning process, in first reactor, add the solvent of preheating earlier, after 120min is cleaned in insulation, in second reactor, add the solvent of preheating again, the beginning wash procedure.In addition, when the second reactor polymerization, refrigerant temperature is reduced to 30 ℃; Simultaneously, improve the second reactor transferpump variable-frequency motor rotating speed to 50 rev/min, make the polymer dope flow increase to 70L/min.
Embodiment 2:
Increase a solvent US primary heater unit in whole poly-unit, this device is the stainless steel vertical vessel, band heating jacket device, and requiring total volume is 2M
3, US comes from refining directly the conveying with pipeline, the US primary heater unit by pipeline respectively at two reactors link to each other (seeing accompanying drawing 1).Before the cleaning, with the solvent still preheater US is preheating to 110 ℃ of cleaning temperatures earlier.In cleaning process, the solvent that adds preheating earlier carries out the cleaning of first reactor, after 160min is cleaned in insulation, again to the solvent of middle adding preheating, begins the second reactor wash procedure.In addition, when the second reactor polymerization, refrigerant temperature is reduced to 10 ℃; Simultaneously, improve the second reactor transferpump variable-frequency motor rotating speed to 60 rev/min, make the polymer dope flow increase to 80L/min.
Embodiment 3:
Increase a solvent US primary heater unit in whole poly-unit, this device is the stainless steel vertical vessel, band heating jacket device, and requiring total volume is 1.5M
3, US comes from refining directly the conveying with pipeline, the US primary heater unit by pipeline respectively at two reactors link to each other (seeing accompanying drawing 1).Before the cleaning, with the solvent still preheater US is preheating to 105 ℃ of cleaning temperatures earlier.In cleaning process, the solvent that adds preheating earlier carries out the cleaning of first reactor, after 180min is cleaned in the insulation of first reactor, adds the solvent of preheating again in second reactor, begins the second reactor wash procedure.In addition, when the second reactor polymerization, refrigerant temperature is reduced to 40 ℃; Simultaneously, improve the second reactor transferpump variable-frequency motor rotating speed to 70 rev/min, make the polymer dope flow increase to 90L/min.
The present invention does not address part and is applicable to prior art.
Claims (3)
1. one kind is used for the method that urethane dry-spinning spandex polymeric kettle cleans, it is characterized in that: in whole poly-unit, increased the solvent still preheater, to be preheating to the cleaning design temperature, the solvent preheating temperature is 100-130 ℃, saves the heat-up time of solvent in reactor; Secondly, reconfigure wash procedure, adopt first reactor and the second reactor independent cleaning way of staggering the time, described first reactor is used for pre-polymerization, and described second reactor is used for polymerization, and described wash procedure is: the solvent that adds preheating earlier carries out the cleaning of first reactor, after 50～180min is cleaned in insulation, in second reactor, add the solvent of preheating again, begin the second reactor wash procedure, reduce and clean the used time; In addition, in the polymerization process of second reactor,, shorten the cooling polymerization time in second reactor, improve polymerization efficiency by reducing refrigerant temperature to 8～50 ℃; Simultaneously, by increasing the transferpump variable-frequency motor rotating speed of second reactor, increase polymer flow rate and pressure in second reactor, the transferpump variable-frequency motor rotating speed of described second reactor is 40～70r/min, polymer flow rate is 70～90L/min, lowers the polymkeric substance handover time in second reactor, supplies the amount polishing with cleaning the polymer dope that is influenced, and guarantee the shelf-time control criterion, guarantee the quality of spinning solution.
2. the method that is used for the cleaning of urethane dry-spinning spandex polymeric kettle according to claim 1, wherein said solvent still preheater is the vertical band heating jacket of a stainless steel reactor, total volume is 0.5～5M
3, solvent is come from refining directly the conveying with pipeline, the solvent still preheater by pipeline respectively with first reactor with link to each other with second reactor.
3. the method that is used for the cleaning of urethane dry-spinning spandex polymeric kettle according to claim 1, wherein said solvent is: dimethyl formamide (DMF), N,N-DIMETHYLACETAMIDE (DMAC), dimethyl sulfoxide (DMSO) (DMSO).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101545777A CN101704935B (en) | 2009-11-13 | 2009-11-13 | System for cleaning polymeric kettle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101545777A CN101704935B (en) | 2009-11-13 | 2009-11-13 | System for cleaning polymeric kettle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101704935A CN101704935A (en) | 2010-05-12 |
| CN101704935B true CN101704935B (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101545777A Expired - Fee Related CN101704935B (en) | 2009-11-13 | 2009-11-13 | System for cleaning polymeric kettle |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106269735A (en) * | 2016-07-30 | 2017-01-04 | 淄博德信联邦化学工业有限公司 | The method for cleaning of reactor fouling |
| CN111804253A (en) * | 2020-07-14 | 2020-10-23 | 山东京博中聚新材料有限公司 | Recycling process of styrene-butadiene latex reaction kettle washing water |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093762A (en) * | 1993-04-16 | 1994-10-19 | 沈阳石油化工厂 | The manufacture method of polyurethane fibre high tenacity fibre rayon |
| CN1521289A (en) * | 2002-12-16 | 2004-08-18 | 拜尔法斯尔股份有限公司 | Process for the production of polyurethane urea fibers by dry spinning or wet spinning |
-
2009
- 2009-11-13 CN CN2009101545777A patent/CN101704935B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093762A (en) * | 1993-04-16 | 1994-10-19 | 沈阳石油化工厂 | The manufacture method of polyurethane fibre high tenacity fibre rayon |
| CN1521289A (en) * | 2002-12-16 | 2004-08-18 | 拜尔法斯尔股份有限公司 | Process for the production of polyurethane urea fibers by dry spinning or wet spinning |
Non-Patent Citations (2)
| Title |
|---|
| 张军 等.聚氨酯弹性纤维的生产与应用.《聚氨酯工业》.2000,第15卷(第4期),第11－14页. * |
| 邱九辉.氨纶干法纺丝介质循环系统的设备和工艺介绍.《合成纤维工业》.2003,第26卷(第4期),第52-53页. * |
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| CN101704935A (en) | 2010-05-12 |
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