CN102120827A - Process and device for extracting nylon polymerized slice - Google Patents
Process and device for extracting nylon polymerized slice Download PDFInfo
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- CN102120827A CN102120827A CN2010105495750A CN201010549575A CN102120827A CN 102120827 A CN102120827 A CN 102120827A CN 2010105495750 A CN2010105495750 A CN 2010105495750A CN 201010549575 A CN201010549575 A CN 201010549575A CN 102120827 A CN102120827 A CN 102120827A
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Abstract
The invention relates to a process and device for extracting a nylon polymerized slice, i.e. a process and device for extracting a nylon polymerized slice through pressurizing and extracting, in particular to a process and device for extracting a nylon polymerized slice by increasing an extraction temperature through pressurizing. In the process for extracting the nylon polymerized slice, the interior of an extraction tower is divided into an upper section, a middle section and a lower section according to water temperature, wherein the water temperature of the upper section is 105-130 DEG C, the extraction pressure at the upper part of the extraction tower is 0.03-0.1MPa according to the water temperature of the upper section, and the pressure is limited to a fact that the slice in the upper section is not tumbled. By adopting the process and device for extracting the nylon polymerized slice, the low-molecule product content in the extracted slice can drop to 1.5-2.0 percent, and the requirement of high-quality spinning is met.
Description
Technical field
The present invention relates to a kind of nylon polymerization section extraction process and device, a kind of nylon polymerization section extraction process and device of pressure extraction just is provided, specifically a kind of nylon polymerization section extraction process and device that pressurizes and improve extraction temperature.
Background technology
In making the nylon polymerization slicing processes, have and contain 10% lower-molecular substance approximately from pelletizing system, therefore, need the section extraction process, this extraction process is that section enters extraction tower, moves down under action of gravity, the soft water and the section that are entered by the extraction tower bottom are countercurrent flow, it is inner that water molecules constantly is penetrated into section, and lower-molecular substance constantly diffuses out and is dissolved in the hot water from section, takes away low molecular compound in the section by water at last.
The section that generates through casting contains these low molecular compounds of low molecular compound (monomer and oligomer) of 8-10% as not removing, then not only can in spinning process, be evaporated, polluting production environment, to worsen labor condition infringement workman healthy but also can residue in unevenly in the fiber, form " weakness " thus reduce the brute force of fiber, influence normally carrying out of spinning, so to the in addition eccysis of the contained low molecular compound of polycaprolactam section.And the polycaprolactam section is washed with soft water (90 ℃～100 ℃), to remove contained low molecular compound in the section.
The nylon polymerization section extraction process of prior art all is to extract under the normal pressure, can realize that the low-molecular material content that extracts in the section of back is about 2.0%, but because the boiling point of water is 100 ℃, low-molecular material content is difficult to drop to below 2.0%, and low-molecular material content also is difficult to be controlled at relatively a steady state value simultaneously.
The extraction water temperature contains single influence to section:
The spread coefficient of polycaprolactam low molecular compound raises with temperature and increases.Therefore extract water temperature section low molecular compound content is had great effect, extraction water temperature height molecular compound content has obvious decline, but extraction water temperature height, the extraction tower top water is vaporized easily, cause top section boiling, normally moving down of influence section, thus the influence extraction contains list, is unfavorable for production control.
Summary of the invention
The purpose of this invention is to provide a kind of nylon polymerization section extraction process and device, a kind of nylon polymerization section extraction process and device of pressure extraction just are provided, specifically a kind of nylon polymerization section extraction process and device that pressurizes and improve extraction temperature, low-molecular material content in the section of extraction back can drop to 1.5%～2.0%, reaches high-quality spinning requirement.
A kind of nylon polymerization section extraction process of the present invention, be divided into epimere, stage casing and hypomere three parts according to water temperature in the extraction tower, described epimere water temperature is 105～130 ℃, the extracting pressure on described extraction tower top is 0.03～0.1Mpa according to described epimere water temperature, and described pressure does not seethe with the section in the epimere and exceeds.
As optimized technical scheme:
Wherein, aforesaid a kind of nylon polymerization section extraction process, described extracting pressure adopts " U " shape pipe water seal pressuring method.
Aforesaid a kind of nylon polymerization section extraction process, described nylon is nylon 6 or nylon 66.
The present invention also provides a kind of nylon polymerization section extraction plant, and the extraction tower epimere has heat-exchanger rig, and venting port is arranged at the extraction tower top, is connected with a vapor pipe on the venting port, and described vapor pipe is connected one " U " shape pipe, and irritating in described " U " shape pipe has water.
Aforesaid a kind of nylon polymerization section extraction plant, the other end of described " U " shape pipe connects a liquid packing.
Aforesaid a kind of nylon polymerization section extraction plant is installed an automatic regulating valve on the described vapor pipe.
Extraction process after the improvement adopts extraction water seal pressurization, prevents that temperature is high and the section boiling that causes, contains list thereby reduce extraction.
Beneficial effect
A kind of nylon polymerization section extraction process of the present invention is easy, operation easily, and the low-molecular material content in the section of extraction back can drop to 1.5%～2.0%, reaches high-quality spinning requirement.
The simple input cost of a kind of nylon polymerization section extraction plant transformation of the present invention is low.
Description of drawings
Accompanying drawing is the structural representation of a kind of nylon polymerization section extraction plant of the present invention
Wherein 1 is that opening for feed 2 is that discharge port 3 is that extraction tower 4 is that heat-exchanger rig 5 is venting ports
6 automatic regulating valves 7 are that " U " shape pipe 8 is that liquid packing 9 is vapor pipes
Embodiment
Below in conjunction with embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
A kind of nylon polymerization section extraction process of the present invention, be divided into epimere, stage casing and hypomere three parts according to water temperature in the extraction tower 3, described epimere water temperature is 105～130 ℃, the extracting pressure on described extraction tower top is 0.03～0.1Mpa according to described epimere water temperature, and described pressure does not seethe with the section in the epimere and exceeds.
Wherein, aforesaid a kind of nylon polymerization section extraction process, described extracting pressure adopts " U " shape pipe water seal pressuring method.
Aforesaid a kind of nylon polymerization section extraction process, described nylon is nylon 6 or nylon 66.
The present invention also provides a kind of nylon polymerization section extraction plant, extraction tower 3 epimeres have heat-exchanger rig 4, and venting port 5 is arranged at the extraction tower top, are connected with a vapor pipe 9 on the venting port 5, described vapor pipe 9 is connected one " U " shape pipe 7, and irritating in described " U " shape pipe 7 has water.1 is the section opening for feed that contains list 8～10% that casting produces among the figure, the 2nd, contain single 1.5～2.0% section discharge port
Aforesaid a kind of nylon polymerization section extraction plant, the other end of described " U " shape pipe 7 connects a liquid packing 8.
Aforesaid a kind of nylon polymerization section extraction plant is installed an automatic regulating valve 6 on the described vapor pipe 9.
Extraction process after the improvement adopts extraction water seal pressurization, prevents that temperature is high and the section boiling that causes, contains list thereby reduce extraction.
Embodiment 1
Be divided into epimere, stage casing and hypomere three parts according to water temperature in the extraction tower 3, described epimere water temperature is 105 ℃, and the extracting pressure on described extraction tower top is 0.03Mpa, and the section that obtains at last contains single 2.0%
Embodiment 2
Be divided into epimere, stage casing and hypomere three parts according to water temperature in the extraction tower 3, described epimere water temperature is 130 ℃, and the extracting pressure on described extraction tower top is 0.1Mpa, and the section that obtains at last contains single 1.5%.
Embodiment 3
Be divided into epimere, stage casing and hypomere three parts according to water temperature in the extraction tower 3, described epimere water temperature is 110 ℃, and the extracting pressure on described extraction tower top is 0.05Mpa, and the section that obtains at last contains single 1.8%.
Claims (6)
1. nylon polymerization section extraction process, be divided into epimere, stage casing and hypomere three parts according to water temperature in the extraction tower, it is characterized in that: described epimere water temperature is 105～130 ℃, the extracting pressure on described extraction tower top is 0.03～0.1Mpa according to described epimere water temperature, and described pressure does not seethe with the section in the epimere and exceeds.
2. a kind of nylon polymerization section extraction process as claimed in claim 1 is characterized in that described extracting pressure adopts " U " shape pipe water seal pressuring method.
3. a kind of nylon polymerization section extraction process as claimed in claim 1 is characterized in that described nylon is nylon 6 or nylon 66.
4. nylon polymerization section extraction plant, the extraction tower epimere has heat-exchanger rig, and venting port is arranged at the extraction tower top, is connected with a vapor pipe on the venting port, it is characterized in that: described vapor pipe is connected one " U " shape pipe, and irritating in described " U " shape pipe has water.
5. a kind of nylon polymerization section extraction plant as claimed in claim 4 is characterized in that the other end of described " U " shape pipe connects a liquid packing.
6. a kind of nylon polymerization section extraction plant as claimed in claim 4 is characterized in that, an automatic regulating valve is installed on the described vapor pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105495750A CN102120827A (en) | 2010-11-18 | 2010-11-18 | Process and device for extracting nylon polymerized slice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105495750A CN102120827A (en) | 2010-11-18 | 2010-11-18 | Process and device for extracting nylon polymerized slice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102120827A true CN102120827A (en) | 2011-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105495750A Pending CN102120827A (en) | 2010-11-18 | 2010-11-18 | Process and device for extracting nylon polymerized slice |
Country Status (1)
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| CN (1) | CN102120827A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1509303A (en) * | 2001-05-21 | 2004-06-30 | 拜尔公司 | Method and device for extraction of polyamide |
| CN101050279A (en) * | 2007-05-09 | 2007-10-10 | 武汉森大科技研究发展中心 | Production technique and equipment for polymerizing polyamide |
-
2010
- 2010-11-18 CN CN2010105495750A patent/CN102120827A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1509303A (en) * | 2001-05-21 | 2004-06-30 | 拜尔公司 | Method and device for extraction of polyamide |
| CN101050279A (en) * | 2007-05-09 | 2007-10-10 | 武汉森大科技研究发展中心 | Production technique and equipment for polymerizing polyamide |
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Application publication date: 20110713 |