CN204767593U - A extraction tower that is used for nylon 6 section to retrieve production lines - Google Patents
A extraction tower that is used for nylon 6 section to retrieve production lines Download PDFInfo
- Publication number
- CN204767593U CN204767593U CN201520516456.3U CN201520516456U CN204767593U CN 204767593 U CN204767593 U CN 204767593U CN 201520516456 U CN201520516456 U CN 201520516456U CN 204767593 U CN204767593 U CN 204767593U
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- Prior art keywords
- extraction tower
- head tank
- water
- fresh water
- nylon
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- 238000000605 extraction Methods 0.000 title claims abstract description 98
- 229920002292 Nylon 6 Polymers 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- 239000013505 freshwater Substances 0.000 claims abstract description 156
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- 238000005516 engineering process Methods 0.000 claims description 13
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 3
- 239000000178 monomer Substances 0.000 abstract description 13
- 210000002421 cell wall Anatomy 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 239000004677 Nylon Substances 0.000 description 11
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical group O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 11
- 229920001778 nylon Polymers 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000012632 extractable Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- Polyamides (AREA)
Abstract
The utility model relates to an extraction tower that is used for nylon 6 section to retrieve production lines, including the extraction tower body to and locate the elevated tank at extraction tower body top, the section feed inlet is established to the elevated tank upper end, elevated tank lower extreme and extraction tower main part upper end is connected, extraction tower main part lower extreme is equipped with the section export, extraction tower body lower part is equipped with the fresh water (FW) pipeline of intaking, extraction tower body upper portion is equipped with fresh water (FW) outlet pipe line, elevated tank upper portion is equipped with the fresh water (FW) water inlet, the fresh water (FW) water inlet of elevated tank is connected with the elevated tank fresh water (FW) pipeline of intaking, be equipped with the fresh water (FW) delivery port in the elevated tank lower part, the fresh water (FW) delivery port of elevated tank is connected with elevated tank fresh water (FW) outlet pipe line. Compared with the prior art, the utility model, effectively solve the phenomenon of too much monomer and oligomer jam fresh water (FW) pipeline and scale deposit on the high -order cell wall of extraction tower, it is efficient to have an extraction, advantage that job stabilization is reliable.
Description
Technical field
The utility model relates to nylon 6 slice production technology, the extraction tower particularly used in nylon 6 slice remanufacture line, removes for caprolactam monomer in nylon 6 slice and oligomer.
Background technology
The industrial process of nylon 6 slice normally by caprolactam hydrolysis under the high temperature conditions, then carries out addition polycondensation reaction generation polycaprolactam (nylon 6).In nylon 6 slice production process, the hydrolytic polymerization of caprolactam is a reversible balanced reaction, and when polymerisation reaches balance, the conversion ratio of caprolactam is generally about 90%, so except polycaprolactam in polymerizate, go back caprolactam monomer and the oligomer of remaining about 10%.If a large amount of caprolactam and oligomer enter spinning with section, can spinneret be polluted, affect spinning quality, shorten the life cycle of spinneret, increase spinning break rate, increase spinning unit consumption, but also can affect the dyeability of fiber, so these monomers and oligomer must remove.Caprolactam monomer and oligomer generally remove, so they are also referred to as hot water extractables by the method for water hot extraction.
At present, domestic in nylon 6 slice production process, the adverse current high-temperature extraction that the extraction of section generally adopts, is namely entered from the bottom of extraction tower device by the fresh water (FW) of heating, section, from the free-falling of extraction tower top, adopts certain water-bath than the effect of extracting reaching section; In producing in the polymerization of producing nylon 6 reclaimed materials, most of producer directly carries out depolymerization polymerization the concentrate after extraction water evaporation.Nylon 6 slice extraction adopts extraction tower to carry out, the head tank that extraction tower includes extraction tower main body and is located at above extraction tower main body, section charging aperture is established in head tank upper end, section charging aperture connects chip bunker, head tank lower end is connected with extraction tower main body upper end, extraction tower main body lower end is provided with section outlet, section outlet connects the process pipelines that drying system is transported in section, extraction tower body lower part is provided with fresh water (FW) back with water inlet line, extraction tower body upper part is provided with fresh water (FW) water outlet pipeline, fresh water (FW) water outlet pipeline leads to fresh water (FW) collecting tank, fresh water (FW) evaporates utilization again at fresh water (FW) collecting tank.Such fresh water (FW) is flowed to top by extraction tower lower body part, and nylon 6 slice from top to bottom falls under gravity, thus forms counter-current extraction.
In actual production process, in extraction tower, fresh water (FW) peak level can rise to head tank bottom, and the fresh water (FW) exit position of extraction tower main body is lower than fresh water (FW) actual water level in extraction tower, thus cause the fresh water (FW) retained bottom head tank to circulate, or internal circulating load is minimum, be equivalent to stagnant water, in the extraction tower course of work, the nylon chips constantly entered, the oligomer that extracts from nylon chips 6 in the fresh water (FW) retained bottom head tank and monomer concentration is caused to raise gradually, form the high concentration extraction water of high oligomer and monomer concentration, high concentration extraction water concentration reaches necessarily, there is crystallize out, and, because the fresh water (FW) bottom head tank cannot circulate, the temperature of fresh water (FW) is on the low side, thus cause the easier crystallize out of head tank middle and high concentration extraction water, easily be gathered in the head tank of extraction tower after oligomer and monomer crystallization, fouling on the circulating water pipeline wall causing extraction tower head tank and system thereof, blocking pipe time even serious, thus cause production line breaks in production.
Summary of the invention
Goal of the invention of the present utility model is: for overcoming the defect that prior art exists, the utility model provides a kind of extraction tower for nylon 6 slice remanufacture line, realize fresh water (FW) circulation in head tank, the phenomenon of the too much monomer of effective solution and oligomer blocking fresh water (FW) pipeline and fouling on the high-order cell wall of extraction tower, there is extraction efficiency high, the reliable advantage of working stability.
For achieving the above object, the utility model provides following technical scheme: a kind of extraction tower for nylon 6 slice remanufacture line, include extraction tower body, and be located at the head tank of extraction tower bodies top, section charging aperture is established in described head tank upper end, head tank lower end is connected with extraction tower main body upper end, extraction tower main body lower end is provided with section outlet, extraction tower body lower part is provided with fresh water (FW) back with water inlet line, extraction tower body upper part is provided with fresh water (FW) water outlet pipeline, it is characterized in that: described head tank top is provided with fresh water (FW) water inlet, the fresh water (FW) water inlet of head tank is connected with elevated tank technology water back with water inlet line, fresh water (FW) delivery port is provided with in head tank bottom, the fresh water (FW) delivery port of head tank is connected with elevated tank technology water water outlet pipeline.
By adopting technique scheme, fresh water (FW) enters from the top of head tank, flow out from the bottom of head tank, form the fresh water (FW) water circulation of head tank, elevated tank technology water water outlet pipeline makes to flow out circulation by the fresh water (FW) that extraction tower body enters simultaneously, not only makes fresh water (FW) temperature in head tank be improved, and reaches extraction water concentration in reduction head tank, therefore make nylon chips 6 extract in advance in head tank, improve extraction efficiency; And, head tank top passes into fresh water (FW) and not only has dilution extraction water concentration (in head tank, the oligomer of fresh water (FW) and content of monomer are down to 1-3% from 6-9%), improve the effect of extraction efficiency, also have and add fresh water (FW) internal circulating load, the fresh water (FW) that head tank top enters, nylon chips 6 can be made to drive the extraction water of high concentration to move down along with nylon chips 6, thus reduce extraction water concentration in head tank; Extraction tower of the present utility model, there is the temperature and diluted concentration that improve fresh water (FW) in head tank, thus nylon chips is extracted in advance in head tank, improve extraction efficiency and product quality, and avoid the monomer of precipitation and low polymer crystal to separate out, easily be gathered in the head tank of extraction tower after solving traditional many oligomer and monomer crystallization, the phenomenon of fouling on the circulating water pipeline wall causing extraction tower head tank and system thereof; And separate out for reaching monomer and low polymer crystal in the extraction water avoided in head tank, be not only pass into fresh water (FW) and the circulation of the simple water yield increases, and be after passing into fresh water (FW) water, utilize material (nylon chips 6) to drive high concentration extraction water in head tank to move down, and the Multiple Superposition effect such as extraction water temperature rising realize; Have production stability good, continuity is good, reduces maintenance cost, the advantage such as to enhance productivity.
The utility model is set to further: described head tank groove outer wall is coated with heat-insulation layer.
By adopting technique scheme, improving fresh water (FW) water temperature in head tank, improving extraction efficiency, avoiding the crystal of monomer and low polymer to separate out further, improve the stability of producing.
The utility model is set to further: described heat-insulation layer is the steam pipe coil of winding outside head tank, and port corresponding with head tank top on steam pipe coil is steam inlet, and port corresponding with head tank bottom on steam pipe coil is connected with condensate water discharging pipeline.
By adopting technique scheme, not only have heat insulation effect, and have heating effect, steam from top to bottom passes into, consistent with fresh water (FW) flow direction in head tank, is convenient to control fresh water (FW) water temperature in head tank, increases work efficiency and functional reliability.
The utility model is set to further: described head tank top is also provided with temperature sensor, and in described head tank, fresh water (FW) temperature is 90 DEG C ~ 98 DEG C.
By adopting technique scheme, being convenient to the temperature of observing fresh water (FW) in head tank, preventing the too high fresh water (FW) that causes of temperature to seethe with excitement vaporization and temperature is too low affects functional reliability.
The utility model is set to further: described extraction tower body is coated with steam jacket, and steam jacket upper port is steam inlet, and steam jacket lower port is connected with steam condensate (SC) water outlet pipeline.
By adopting technique scheme, improving and controlling the temperature of fresh water (FW) in extraction tower body, improving functional reliability and operating efficiency.
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing explanation
Fig. 1 is the extraction tower structure diagram of the utility model specific embodiment for nylon 6 slice remanufacture line.
Detailed description of the invention
See accompanying drawing 1, a kind of extraction tower for nylon 6 slice remanufacture line disclosed in the utility model, include extraction tower body 1, and be located at the head tank 2 at extraction tower body 1 top, section charging aperture 21 is established in described head tank 2 upper end, head tank 2 lower end is connected with extraction tower main body 1 upper end, extraction tower main body 1 lower end is provided with section outlet 11, extraction tower body 1 bottom is provided with fresh water (FW) back with water inlet line 3, fresh water (FW) back with water inlet line 3 is by the first ball valve 31, flowmeter 32 and the second ball valve 33 serial connection are formed, two ball valve is adopted to control, control more reliable and stable, described extraction tower body upper part is provided with fresh water (FW) water outlet pipeline 6, described head tank 2 top is provided with fresh water (FW) water inlet, the fresh water (FW) water inlet of head tank 2 is connected with elevated tank technology water back with water inlet line 4, elevated tank technology water back with water inlet line 4 is serially connected with the 3rd ball valve 41, flowmeter 42 and the 4th ball valve 43, elevated tank technology water back with water inlet line adopts two ball valve to control, control more reliable and stable, fresh water (FW) delivery port is provided with in described head tank 2 bottom, the fresh water (FW) delivery port of head tank 2 is connected with elevated tank technology water water outlet pipeline 5.Elevated tank technology water water outlet pipeline also leads to fresh water (FW) collecting box.
In this specific embodiment, described head tank 2 groove outer wall is coated with heat-insulation layer 7.Described heat-insulation layer 7 is the steam pipe coil 7 of winding outside head tank, and port corresponding with head tank 2 top on steam pipe coil 7 is steam inlet 71, and port corresponding with head tank 2 bottom on steam pipe coil 7 is connected with condensate water discharging pipeline 8.Condensate water discharging pipeline 8 is serially connected with condensate water discharging first to control ball valve 81, drain valve 82 and condensate water discharging second and control ball valve 83, avoids steam leakage and ensure that condensed water is discharged reliable.Realize nylon chips 6 high-temperature extraction in head tank to separate out, improve extraction efficiency and product quality, and avoid the crystallization of low polymer and monomer.Wherein, described head tank top is also provided with temperature sensor 22, is convenient to control water temperature, and in described head tank 2, fresh water (FW) temperature is 90 DEG C ~ 98 DEG C.Prevent the too high fresh water (FW) that causes of temperature to seethe with excitement vaporization and temperature is too low affects functional reliability.
In this specific embodiment, described extraction tower body 1 is coated with steam jacket 9, and steam jacket 9 upper port is steam inlet 91, and steam jacket 9 lower port is connected with steam condensate (SC) water outlet pipeline.Steam condensate (SC) water outlet pipeline is serially connected with condensed water water outlet first to control ball valve 92, drain valve 93 and condensed water water outlet second and control ball valve 94, improves and control the temperature of fresh water (FW) in extraction tower body, improve functional reliability and operating efficiency.
Extraction tower for nylon 6 slice remanufacture line of the present utility model, fresh water (FW) enters from the top of head tank, flow out from the bottom of head tank, form the fresh water (FW) water circulation of head tank, elevated tank technology water water outlet pipeline makes to flow out circulation by the fresh water (FW) that extraction tower body enters simultaneously, fresh water (FW) temperature in head tank is not only made to be improved, and reach extraction water concentration in reduction head tank, therefore nylon chips 6 is made to extract in advance in head tank, improve extraction efficiency, fresh water (FW) forms double circulation in head tank, ensure fresh water (FW) constant concentration in extraction tower, and, head tank top passes into fresh water (FW) and not only has dilution extraction water concentration (in head tank, the oligomer of fresh water (FW) and content of monomer are down to 1-3% from 6-9%), improve the effect of extraction efficiency, also have and add fresh water (FW) internal circulating load, the fresh water (FW) that head tank top enters, nylon chips 6 can be made to drive the extraction water of high concentration to move down along with nylon chips 6, thus reduce extraction water concentration in head tank.
Claims (5)
1. the extraction tower for nylon 6 slice remanufacture line, include extraction tower body, and be located at the head tank of extraction tower bodies top, section charging aperture is established in described head tank upper end, head tank lower end is connected with extraction tower main body upper end, extraction tower main body lower end is provided with section outlet, extraction tower body lower part is provided with fresh water (FW) back with water inlet line, extraction tower body upper part is provided with fresh water (FW) water outlet pipeline, it is characterized in that: described head tank top is provided with fresh water (FW) water inlet, the fresh water (FW) water inlet of head tank is connected with elevated tank technology water back with water inlet line, fresh water (FW) delivery port is provided with in head tank bottom, the fresh water (FW) delivery port of head tank is connected with elevated tank technology water water outlet pipeline.
2. according to claim 1 for the extraction tower of nylon 6 slice remanufacture line, it is characterized in that: described head tank groove outer wall is coated with heat-insulation layer.
3. according to claim 2 for the extraction tower of nylon 6 slice remanufacture line, it is characterized in that: described heat-insulation layer is the steam pipe coil of winding outside head tank, port corresponding with head tank top on steam pipe coil is steam inlet, and port corresponding with head tank bottom on steam pipe coil is connected with condensate water discharging pipeline.
4. according to claim 3 for the extraction tower of nylon 6 slice remanufacture line, it is characterized in that: described head tank top is also provided with temperature sensor, in described head tank, fresh water (FW) temperature is 90 DEG C ~ 98 DEG C.
5. according to claim 1 or 2 or 3 or 4 for the extraction tower of nylon 6 slice remanufacture line, it is characterized in that: described extraction tower body is coated with steam jacket, steam jacket upper port is steam inlet, and steam jacket lower port is connected with steam condensate (SC) water outlet pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520516456.3U CN204767593U (en) | 2015-07-16 | 2015-07-16 | A extraction tower that is used for nylon 6 section to retrieve production lines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520516456.3U CN204767593U (en) | 2015-07-16 | 2015-07-16 | A extraction tower that is used for nylon 6 section to retrieve production lines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204767593U true CN204767593U (en) | 2015-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520516456.3U Expired - Fee Related CN204767593U (en) | 2015-07-16 | 2015-07-16 | A extraction tower that is used for nylon 6 section to retrieve production lines |
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| CN (1) | CN204767593U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107029447A (en) * | 2017-05-27 | 2017-08-11 | 江苏华洋尼龙有限公司 | A kind of nylon chips extraction equipment and production line |
| CN107030925A (en) * | 2017-05-27 | 2017-08-11 | 江苏华洋尼龙有限公司 | A kind of nylon chips production line and its production method |
-
2015
- 2015-07-16 CN CN201520516456.3U patent/CN204767593U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107029447A (en) * | 2017-05-27 | 2017-08-11 | 江苏华洋尼龙有限公司 | A kind of nylon chips extraction equipment and production line |
| CN107030925A (en) * | 2017-05-27 | 2017-08-11 | 江苏华洋尼龙有限公司 | A kind of nylon chips production line and its production method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 |