CN202730053U - Polyamide slice extraction water recovery device with multistage extraction - Google Patents
Polyamide slice extraction water recovery device with multistage extraction Download PDFInfo
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- CN202730053U CN202730053U CN 201220370323 CN201220370323U CN202730053U CN 202730053 U CN202730053 U CN 202730053U CN 201220370323 CN201220370323 CN 201220370323 CN 201220370323 U CN201220370323 U CN 201220370323U CN 202730053 U CN202730053 U CN 202730053U
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Abstract
The utility model belongs to the field of chemical equipment, and particularly relates to a polyamide slice extraction water recovery device with multistage extraction. The utility model aims at providing the polyamide slice extraction water recovery device with multistage extraction. The device comprises a preliminary extraction tank, an extraction device, an extraction water recycling device, a reflux device and a polyamide slice drying device. The preliminary extraction tank is respectively connected with the extraction device and the extraction water recycling device and the extraction device is connected with the polyamide slice drying device. A valve and the reflux device are arranged between the preliminary extraction tank and the extraction device which comprises two or more than two extraction towers. The multistage extraction recovery device for the polyamide slice extraction water has the advantages of being low in energy consumption, low in production cost, high in concentration multiple, good in production stability, convenient to control and suitable for high-volume production of the polyamide slice.
Description
Technical field
The utility model belongs to the chemical industry equipment field, is specifically related to a kind of retrieving arrangement with polymeric amide section extraction water of multi-stage solvent extraction.
Background technology
Polymeric amide (PA is commonly called as nylon) is that U.S. DuPont company develops the resin for fiber at first, realizes industrialization in nineteen thirty-nine.Begin the development and production injection-molded item the 1950's, satisfy the requirement of the lightweight of downstream industry goods, reduction cost with substituted metal.PA has good over-all properties, comprise mechanical property, thermotolerance, wearability, chemical proofing and self lubricity, and frictional coefficient is low, certain flame retardant resistance is arranged, be easy to processing, be suitable for improving performance and broadened application scope with glass fibre and other filler filling enhancing modified.PA's is various in style, and PA6, PA66, PAll, PAl2, PA46, PA610, PA612, PAl010 etc. are arranged.
At present, at home and abroad, the polymerizing polyamide suitability for industrialized production generally adopts hexanolactam hydrolytic polymerization Technology, but there are the problems such as contaminate environment and the wasting of resources in the caprolactam polymerization suitability for industrialized production.The hexanolactam hydrolytic-polymeric reaction is the chemical reaction of a reversible balance, can not realize the transformation efficiency of caprolactam monomer 100%, after the polyreaction balance, contain the caprolactam monomer of 7-8% and about 2% oligopolymer (comprising cyclic oligomer and linear oligomer etc.) in the polymkeric substance, if do not remove these materials, the following process operation such as spinning, moulding of polymeric amide will be had a strong impact on, and caprolactam monomer and oligomer in the polymeric amide section extraction water are about 7-14%, therefore need to recycle the polymeric amide extraction water of cutting into slices.
The utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of retrieving arrangement with polymeric amide section extraction water of multi-stage solvent extraction.This device is provided with caprolactam monomer, oligopolymer and the water that the recyclable polymeric amide section of a plurality of extraction towers produces in polymerization production process, energy consumption is low, production cost is low, cycles of concentration is high, production stability is good, control is convenient.
The technical solution of the utility model comprises pre-extraction basin, extraction plant, extraction water retrieving arrangement, reflux, polymeric amide chip drying device for a kind of retrieving arrangement with polymeric amide section extraction water of multi-stage solvent extraction is provided;
Described pre-extraction basin is connected with extraction plant, extraction water retrieving arrangement respectively, and described extraction plant is connected with polymeric amide chip drying device; Be provided with valve and reflux between described pre-extraction basin and the extraction plant, described extraction plant comprises two or more extraction towers.
Preferably, the extraction plant of the retrieving arrangement of the above-mentioned polymeric amide section extraction water with multi-stage solvent extraction comprises one-level extraction tower, secondary extraction tower, three grades of extraction towers; Described pre-extraction basin is connected with the one-level extraction tower, and described one-level extraction tower is connected with the secondary extraction tower, and described secondary extraction tower is connected with three grades of extraction towers, and described three grades of extraction towers are connected with polymeric amide chip drying device; Described pre-extraction basin be provided with valve and reflux between the one-level extraction tower is connected, be provided with valve and reflux between described one-level extraction tower connection and the secondary extraction tower, be provided with valve and reflux between described secondary extraction tower and three grades of extraction towers.
Preferably, the reflux of the retrieving arrangement of the above-mentioned polymeric amide section extraction water with multi-stage solvent extraction comprises reflux pump.
Preferably, the reflux of the retrieving arrangement of the above-mentioned polymeric amide section extraction water with multi-stage solvent extraction comprises under meter.
Preferably, be provided with filtration unit between the pre-extraction basin of the retrieving arrangement of the above-mentioned polymeric amide section extraction water with multi-stage solvent extraction and the extraction plant.
But the retrieving arrangement with polymeric amide section extraction water of multi-stage solvent extraction of the present utility model is provided with a plurality of extraction tower mass efficient ground and reclaims caprolactam monomer, oligopolymer and the water that polymeric amide produces in polymerization production process, save mass energy, avoid the loss of these energy and to the pollution of environment, this plant energy consumption is low in addition, production cost is low, cycles of concentration is high, production stability is good, control is convenient, is specially adapted to large capacity (260t/d) and produces the polymeric amide section.
Description of drawings
Fig. 1 is the structural representation of retrieving arrangement that the utlity model has the polymeric amide section extraction water of multi-stage solvent extraction;
1, extracts in advance basin; 2, one-level extraction tower; 3, secondary extraction tower; 4, three grades of extraction towers; 5, reflux; 6, polymeric amide chip drying device; 7, extraction water retrieving arrangement.
Embodiment
By describing technology contents of the present utility model, structural attitude in detail, realized purpose and effect, below in conjunction with embodiment and cooperate that accompanying drawing is detailed to give explanation.
The use technical process of the device of the large capacity of the utility model (260t/d) production polymeric amide section is as follows: hexanolactam melting and storage-additive preparation-polymerization-pelletizing-section extraction-chip drying-section is carried and the evaporation of packing-extraction water.
See also Fig. 1, wherein use the retrieving arrangement of the polymeric amide section extraction water that the utlity model has multi-stage solvent extraction in the section extraction step, it comprises pre-extraction basin 1, extraction plant, extraction water retrieving arrangement 7, reflux 5, polymeric amide chip drying device 6;
Described pre-extraction basin 1 is connected with extraction plant, extraction water retrieving arrangement 7 respectively, and described extraction plant is connected with polymeric amide chip drying device 6; Be provided with valve and reflux 5 between described pre-extraction basin 1 and the extraction plant, described extraction plant comprises two or more extraction towers.
But the retrieving arrangement with polymeric amide section extraction water of multi-stage solvent extraction of the present utility model is provided with a plurality of extraction tower mass efficient ground and reclaims caprolactam monomer, oligopolymer and the water that polymeric amide produces in polymerization production process, save mass energy, avoid the loss of these energy and to the pollution of environment.
As improvement of the present utility model, the extraction plant of the retrieving arrangement of the above-mentioned polymeric amide section extraction water with multi-stage solvent extraction comprises one-level extraction tower 2, secondary extraction tower 3, three grades of extraction towers 4; Described one-level extraction tower 2 connects and is connected with secondary extraction tower 3, and described secondary extraction tower 3 is connected with three grades of extraction towers 4, and described three grades of extraction towers 4 are connected with polymeric amide chip drying device 6; Be provided with valve and reflux 5 between described one-level extraction tower 2 connections and the secondary extraction tower 3, be provided with valve and reflux 5 between described secondary extraction tower 3 and three grades of extraction towers 4.
As improvement of the present utility model, the reflux 5 of the retrieving arrangement of the above-mentioned polymeric amide section extraction water with multi-stage solvent extraction comprises reflux pump.
As improvement of the present utility model, the reflux 5 of the retrieving arrangement of the above-mentioned polymeric amide section extraction water with multi-stage solvent extraction comprises under meter.
As improvement of the present utility model, be provided with filtration unit between the pre-extraction basin 1 of the retrieving arrangement of the above-mentioned polymeric amide section extraction water with multi-stage solvent extraction and the extraction plant.
Production technique of the present utility model:
1, the preparation of raw material hexanolactam
Packed solid hexanolactam is pulverized through pulverizer and is entered fusion boiler by screw feeder, is melt into liquid hexanolactam by external heater in fusion boiler, enters in the basin stand-by.Also can directly adopt liquid hexanolactam as raw material.
2, the preparation of auxiliary agent and water
Chain terminal stablizer, the high effective and modified dose of required auxiliary agent of reaction such as Seed, HMDA are mixed with certain density solution for later use separately by processing requirement.
The polyreaction water is from water tank, and it is stand-by to enter system through filter.
3, prepolymerization
The raw material hexanolactam enters the Special Mixed device with water and quantitative various auxiliary agents after metering preheats mixes, and adds together and carries out the hexanolactam ring-opening reaction in the pre-polymerization reactor, pressurizes by excessive water and accelerates the ring-opening reaction of control hexanolactam.
Pre-polymerization reactor is reactor with pressure, is furnished with a primary fluid heating system and two vapour phase secondary heating medium heating systems.About 4～5 hours of reaction time, the prepolymer relative viscosity that goes out pre-polymerization reactor is about 2.0.
4, polymerization
Prepolymer is carried by toothed gear pump, enters polymerization tower (VK pipe) behind the unnecessary moisture in melt water trap evaporation melt, and polymerization tower is atmospheric tower, the band nitrogen protection, in establish special setting and keep the stable homogeneous distribution fully to guarantee polymer melt.
Polymkeric substance carries out addition, polycondensation in polymerization tower.The moisture that reaction is produced is discharged system by the overhead condensation tower.The melt drop temperature is at 250 degree-260 degree, and about 10 hours of the residence time of polymkeric substance, the viscosity of polymkeric substance reaches about 3.0 when going out polymerization tower, and molecular weight distribution reaches below 2.
5, pelletizing
Melt in the polymerization tower enters underwater pellet cutting system by the melt Conveying pump through fondant filter; the particle of specification equalization is cut in water quench, curing, moulding that the polymkeric substance of melting is here sprayed on the cooling plate of dicing machine under water continuously at last by dicing machine.
Underwater pellet cutting system comprises end of extruded band, dicing machine, centrifuge, vibratory screening apparatus and water circulation system.
6, continuous extraction
Section from pelletizing system enters pre-extraction basin, and section is delivered to extraction plant by transferpump, and separating tank extraction water water out is pumped back after filtering and continues to recycle.
Extraction plant is atmospheric tower, in have the internals of particular design to guarantee that section carries out stable plunger tpe and flow, increase extraction efficiency.Section is flowed from top to bottom, and the desalination current flow in the opposite direction in the extraction plant.Unreacted monomer in the section and oligopolymer are transferred in the extraction water, discharge system by the extraction water recycle system again.
Viscosity after the extraction slightly has the section of increasing to be delivered to the centrifuge at drying tower top by Chips Conveying System.
7, successive drying and solid-phase tack producing
Enter drying tower by about 8～15% sections of moisture percentage after the centrifuge dehydration.
There are the internals of particular design to guarantee that the section plunger tpe flows in the drying tower, and fully contact with nitrogen.Section is flowed from top to bottom, and nitrogen flows in the opposite direction.Moisture in the section is discharged system by nitrogen circulating system.
Drying moisture being controlled at below 0.05% of will cutting into slices not only carried out in section in drying tower, cut into slices simultaneously and further carry out polycondensation at tower, to improve polymericular weight, the small molecule by-product of generation is then taken reaction system out of by means of circulating current, forces the polycondensation forward to carry out.
About 24 hours of drying residencing time.The polymkeric substance relative viscosity about about 3.7 when going out drying tower.
8, high sticking section modification
Moisture after dry is that section 0.05% below enters mixing tank, mixed and modified with the section auxiliary agent with film, cuts into slices and the film grade pet chip to prepare high performance spinning-grade.
9, finished product section
Add the film grade pet chip behind the auxiliary agent, the cooling feed bin of the circulation by cold nitrogen gas stream is arranged, be cooled to qualified temperature after, be sent to finished product bin through pneumatic conveyer.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification sheets and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.
Claims (5)
1. the retrieving arrangement with polymeric amide section extraction water of multi-stage solvent extraction is characterized in that, comprises pre-extraction basin, extraction plant, extraction water retrieving arrangement, reflux, polymeric amide chip drying device;
Described pre-extraction basin is connected with extraction plant, extraction water retrieving arrangement respectively, and described extraction plant is connected with polymeric amide chip drying device; Be provided with valve and reflux between described pre-extraction basin and the extraction plant, described extraction plant comprises two or more extraction towers.
2. the retrieving arrangement with polymeric amide section extraction water of multi-stage solvent extraction according to claim 1 is characterized in that described extraction plant comprises one-level extraction tower, secondary extraction tower, three grades of extraction towers; Described pre-extraction basin is connected with the one-level extraction tower, and described one-level extraction tower is connected with the secondary extraction tower, and described secondary extraction tower is connected with three grades of extraction towers, and described three grades of extraction towers are connected with polymeric amide chip drying device; Described pre-extraction basin be provided with valve and reflux between the one-level extraction tower is connected, be provided with valve and reflux between described one-level extraction tower connection and the secondary extraction tower, be provided with valve and reflux between described secondary extraction tower and three grades of extraction towers.
3. the retrieving arrangement with polymeric amide section extraction water of multi-stage solvent extraction according to claim 1 is characterized in that described reflux comprises reflux pump.
4. the retrieving arrangement with polymeric amide section extraction water of multi-stage solvent extraction according to claim 1 is characterized in that described reflux comprises under meter.
5. the retrieving arrangement with polymeric amide section extraction water of multi-stage solvent extraction according to claim 1 is characterized in that, is provided with filtration unit between described pre-extraction basin and the extraction plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220370323 CN202730053U (en) | 2012-07-27 | 2012-07-27 | Polyamide slice extraction water recovery device with multistage extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220370323 CN202730053U (en) | 2012-07-27 | 2012-07-27 | Polyamide slice extraction water recovery device with multistage extraction |
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| CN202730053U true CN202730053U (en) | 2013-02-13 |
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| CN 201220370323 Expired - Fee Related CN202730053U (en) | 2012-07-27 | 2012-07-27 | Polyamide slice extraction water recovery device with multistage extraction |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058472A (en) * | 2014-06-26 | 2014-09-24 | 聊城市鲁西化工工程设计有限责任公司 | Process for co-producing nylon 6 high-speed spinning slice and nylon 6 spinning slice |
| CN106730992A (en) * | 2017-01-25 | 2017-05-31 | 江苏永通新材料科技有限公司 | A kind of extraction tower for producing polyamide section |
| CN108654139A (en) * | 2018-06-12 | 2018-10-16 | 杨倩倩 | A kind of pharmaceutical purpose three-level counterflow centrifugal extractor |
| CN110732159A (en) * | 2019-11-05 | 2020-01-31 | 大连大学 | continuous grading type high-efficiency extraction device |
| CN115253378A (en) * | 2022-07-27 | 2022-11-01 | 郑州天一萃取科技有限公司 | Multistage centrifugal extraction system and centrifugal extractor for multistage extraction |
-
2012
- 2012-07-27 CN CN 201220370323 patent/CN202730053U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104058472A (en) * | 2014-06-26 | 2014-09-24 | 聊城市鲁西化工工程设计有限责任公司 | Process for co-producing nylon 6 high-speed spinning slice and nylon 6 spinning slice |
| CN104058472B (en) * | 2014-06-26 | 2015-12-30 | 聊城市鲁西化工工程设计有限责任公司 | The technique of section is spun in a kind of nylon 6 high-speed spinning section coproduction |
| CN106730992A (en) * | 2017-01-25 | 2017-05-31 | 江苏永通新材料科技有限公司 | A kind of extraction tower for producing polyamide section |
| CN108654139A (en) * | 2018-06-12 | 2018-10-16 | 杨倩倩 | A kind of pharmaceutical purpose three-level counterflow centrifugal extractor |
| CN110732159A (en) * | 2019-11-05 | 2020-01-31 | 大连大学 | continuous grading type high-efficiency extraction device |
| CN115253378A (en) * | 2022-07-27 | 2022-11-01 | 郑州天一萃取科技有限公司 | Multistage centrifugal extraction system and centrifugal extractor for multistage extraction |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 350209 Airport Industrial Zone, Changle District, Fuzhou City, Fujian Province (Mashan District, Hunan town) Patentee after: Fujian Yongrong Jinjiang Co.,Ltd. Address before: 350212 Fujian city of Fuzhou province Pengcheng Changle Airport Industrial Zone, Road No. 258 Patentee before: FUJIAN JINJIANG TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130213 Termination date: 20210727 |
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| CF01 | Termination of patent right due to non-payment of annual fee |