CN101757801B - Process and device for extracting in multiple stages by high and low grooves - Google Patents
Process and device for extracting in multiple stages by high and low grooves Download PDFInfo
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- CN101757801B CN101757801B CN2009102498082A CN200910249808A CN101757801B CN 101757801 B CN101757801 B CN 101757801B CN 2009102498082 A CN2009102498082 A CN 2009102498082A CN 200910249808 A CN200910249808 A CN 200910249808A CN 101757801 B CN101757801 B CN 101757801B
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Abstract
The invention relates to a process and a device for extracting in multiple stages by high and low grooves. The device comprises multiple-stage of extracting grooves which are arranged like steps from bottom to top; extracting agent and a plurality of extracting protofilament guiding rolls which are arranged high and low alternatively are held in each stage of extracting groove, and a liquid discharging mechanism is arranged on one side of the bottom of the extracting groove, which is near to the next stage of extracting groove; the upper part of the outer wall of the extracting groove which is on the same side of the liquid discharging mechanism is provided with protofilament dividing teeth; the extracting agent flows in the extracting agent inlet from the highest extracting groove and flows out of the extracting agent outlet of the lowest extracting groove, and the protofilament containing high boiling point solvent enters the lowest extracting groove to be winded sequentially on a plurality of extracting protofilament guiding rolls in the lowest extracting groove, then enters the previous stages of extracting grooves through the protofilament dividing teeth and finally comes out from the highest extracting groove; and the high boiling point solvent contained in the protofilament is replaced by the extracting agent to form the protofilament containing the extracting agent. The process can be used for extracting more than 100 bundles of protofilament in one time, thereby reducing the chance that the protofilament is winded in the extracting groove, improving the utilization ratio of the extracting agent and reducing the volatilization loss of the extracting agent.
Description
Technical field
The present invention relates to the extraction process and the device of precursor, especially relate to the multitple extraction technology and the device that adopt a plurality of extraction tanks.
Background technology
In the high-strength high-modulus polyethylene fiber production process, the precursor that needs usually to be full of high boiling solvent extracts with high-volatile extractant, obtains containing the precursor of extractant, and high-volatile extractant is volatilized in the manufacturing procedure of back segment gradually.In order to guarantee effect of extracting, carry out the multitple extraction operation usually.
In existing multitple extraction technology, the extraction tank that adopts two-stage to three grade to be flat on ground usually extracts.For example, Fig. 3 shows the sketch map of three grades of extraction process of a kind of flat placed type of the prior art.In this technology; The precursor 20 that is full of white oil is the extraction tank 22 through being flat on ground successively, wherein by a minute silk tooth 14,15; 16; 17 be divided into monofilament precursor 20 be wrapped in repeatedly on 2 extraction godets 21 in the extraction tank 22, extraction tank 22 is provided with extractant import 18 and extractant outlet 19, makes that the extractants 23 in the extraction tank 22 can flow.Through twice to three times same device, extractant can cement out white oil contained in the precursor, the precursor 24 that contains extractant at last from the end extraction tank go out.
The shortcoming of this multitple extraction technology is: the number of the extraction godet in each extraction tank few (being generally 2), and in order effectively to extract, precursor need twine (reciprocating type rolling extraction) back and forth between the extraction godet, therefore twine silk easily; And owing to be reciprocating type rolling extraction, the radical of precursor is restricted, and general secondary to three grade flat placed type extraction tank can only extract 3-5 root precursor at every turn; In addition, because extractant passes in and out separately at each extraction tank in the flat placed type extraction process, can not recycle, the utilization rate of extractant is low.
Summary of the invention
The object of the present invention is to provide and to reduce the chance that twine silk of precursor in extraction tank simultaneously by single extraction multi beam precursor, and improve the multitple extraction technology and the device of the utilization rate of extractant.
To achieve these goals, the present invention adopts following technical scheme.
One aspect of the present invention relates to a kind of height groove multitple extraction technology, and the multitple extraction groove of this process using stepped placement from low to high is provided with the staggered many extraction godets of height and holds extractant in each grade extraction tank; Be provided with the extractant import at the highest extraction tank, be provided with the extractant outlet at minimum extraction tank, each grade extraction tank bottom is provided with drainage mechanism on an adjacent side with the next stage extraction tank; Be used for extractant is discharged into the next stage extraction tank; And each grade extraction tank is being provided with branch silk tooth with drainage mechanism the same side, and extractant gets into from the extractant import of high extraction tank, flows out from the extractant outlet of minimum extraction tank; And the precursor that contains high boiling solvent gets into from minimum extraction tank; Be wrapped in successively on the many extraction godets in the extraction tank, through dividing the silk tooth to get into the upper level extraction tank successively, finally come out again from the highest extraction tank; Thereby with extractant the high boiling solvent that contains in the precursor is cemented out, form the precursor that contains extractant.
In height groove multitple extraction technology of the present invention, precursor is a super high molecular weight polyethylene gel spinning precursor.High boiling solvent comprises higher boiling mineral oil (white oil), paraffin oil, kerosene etc.Extractant is a low-boiling point material, comprises gasoline, hydrocarbon, xylenes, chloroform, carbon tetrachloride, tetrachloro-ethylene, acetone, trichorotrifluoroethane etc., preferred high-grade gasoline, more preferably 120
#Gasoline
In height groove multitple extraction technology of the present invention, the progression of multitple extraction groove is 3-8, and the number of extraction godet is 3-20 in each extraction tank, preferred 4-10.Dividing the number of teeth of silk tooth is 5-300, preferred 60-150.
Another aspect of the present invention relates to a kind of device that is used for above-mentioned height groove multitple extraction technology; The multitple extraction groove that comprises stepped placement from low to high; Be provided with the staggered many extraction godets of height in the extraction tank and hold extractant; Be provided with the extractant import at the highest extraction tank; Be provided with the extractant outlet at minimum extraction tank, each grade extraction tank bottom is provided with drainage mechanism on an adjacent side with the next stage extraction tank, and each grade extraction tank is provided with branch silk tooth on the outer wall top with drainage mechanism the same side.
In height groove multitple extraction device of the present invention, the progression of multitple extraction groove is 3-8, and dividing the number of teeth of silk tooth is 5-200, preferred 60-150, and the number of extraction godet is 3-20 in each extraction tank, preferred 4-10.
In height groove multitple extraction device of the present invention, the extraction godet can be divided into two groups in each extraction tank, and one group near extraction tank bottom, and one group is immersed in the extract near extraction tank top and part.Adopt this layout, can further improve the extraction efficiency of extractant.
In height groove multitple extraction device of the present invention, can also on extraction tank, add cover plate, be used for the whole covering of multitple extraction groove, to prevent the volatilization of extractant.
Adopt height groove multitple extraction technology of the present invention and device; Significantly increased the quantity of extraction precursor, once can extract the above precursor of 100 bundles, and on the every extraction godet of precursor in extraction tank only around once; Do not have reciprocating type rolling, reduced the chance that twines silk.In addition,, recycle, so the utilization rate of extractant obviously improves because extractant can flow to the next stage extraction tank from the upper level extraction tank, and the corresponding loss that reduces extractant.
Description of drawings
Fig. 1 is the schematic, elevational view of an instance of the present invention's height groove multitple extraction device.
Fig. 2 is the vertical view of the groove of height shown in Fig. 1 multitple extraction device.
Fig. 3 is the schematic plan of three grades of extraction process of a kind of flat placed type of the prior art.
Reference numeral among the figure is following:
1-contains the precursor of high boiling solvent; The 2-jockey pulley; The 3-pressing oil roll; The 4-extraction tank; 5-divides the silk tooth; The 6-cover plate; The 7-extractant; The outlet of 8-extractant; The 9-steam pipe; The import of 10-extractant; The 11-fuel outlet valve; The 12-compressed air hose; 13-extracts godet; 14,15,16,17-divides the silk tooth; The import of 18-extractant; The outlet of 19-extractant; 20-contains the precursor of white oil; 21-extracts godet; The 22-extraction tank; The 23-extractant; 24-contains the precursor of extractant.
The specific embodiment
Be example with ultra-high molecular weight polyethylene gel fiber multitple extraction technology below, be described with reference to the accompanying drawings the present invention.
1, extract and extractant
Adopting ultra-high molecular weight polyethylene gel fiber to prepare in the technology of high-performance fiber; Usually through solvent in multitple extraction technology recycled fiber forming process and the gel fiber; Promptly use high-volatile extractant that the solvent exchange of higher boiling (non-volatile or low volatility) is come out, in heat treatment and/or drawing process, remove high-volatile extractant then.Above-mentioned high boiling solvent comprises higher boiling mineral oil (white oil), paraffin oil, kerosene etc.Extractant is a low-boiling point material, comprises gasoline, hydrocarbon, xylenes, chloroform, carbon tetrachloride, tetrachloro-ethylene, acetone, trichorotrifluoroethane etc., preferred high-grade gasoline, more preferably 120
#Gasoline.
2, multitple extraction device
Describe height groove multitple extraction device of the present invention in detail with reference to Fig. 1 and 2 below.Fig. 1 is the schematic, elevational view of an instance of the present invention's height groove multitple extraction device.Fig. 2 is the vertical view of the groove of height shown in Fig. 1 multitple extraction device.
Height groove multitple extraction device of the present invention comprises the multitple extraction groove of stepped placement from low to high.Each extraction tank 4 has substantial rectangular or square cross section; And in the adjacent extraction tank of two-stage up and down; The upper surface of the basal surface of upper level extraction tank 4 and next stage extraction tank 4 is in the sustained height level basically; And their adjacent sides separately in vertical direction in line, makes a plurality of extraction tanks be continuous stepped arrangement.
The number of extraction tank 4 can be selected as required; But be generally 3-8, reason is, if the number of extraction tank 4 is less than 3; Then possibly be difficult to fully guarantee effect of extracting; And if the number of extraction tank 4 surpasses 8, then the volume of multitple extraction device is too huge, and too much extraction tank can not further improve effect of extracting.In the preferred embodiment, the number of extraction tank 4 is 5 (as shown in Figure 1).
Be provided with many extraction godets 13 in each extraction tank 4 and hold extractant 7.Extraction godet 13 height are staggered, and contact so that the precursor of these rollers of process has more fully with extractant 7, thereby improve effect of extracting.Preferably will extract godet 13 and roughly be divided into two groups, one group near extraction tank bottom, and one group near the extraction tank top, and the difference in height between two groups is preferably big as far as possible, to make full use of the degree of depth of extraction tank.In addition, preferably one group of extraction godet near the extraction tank top partly is immersed in the extract, that is, the part of roller is positioned on the liquid level of extract.Adopt this layout, can make precursor, help the volatilization of extractant in this process at the temporary transient extractant that breaks away from through near one group of the extraction tank top extraction godet time.It is believed that this of short duration volatilization process has promoted the exchange of high boiling solvent and extractant in the precursor, thereby further improve the extraction efficiency of extractant.
Number to extraction godet 13 in each extraction tank 4 has no particular limits, but starts from the consideration of extraction efficiency and equipment cost, and the number of extraction godet 13 is preferably 3-20, more preferably 4-10.
For extractant is flowed from the highest extraction tank to minimum extraction tank; Be provided with extractant import 10 at the highest extraction tank; Be provided with extractant outlet 8 at minimum extraction tank, and each grade extraction tank bottom is provided with a drainage mechanism 11 on an adjacent side with the next stage extraction tank.Drainage mechanism 11 is had no particular limits, but preferably it is the adjustable valve of flow.Drainage mechanism 11 can be regulated the flow of extractant 7 and the liquid level of each grade extraction tank 4.
In order to make precursor, particularly surpass the precursor of 100 bundles, can successfully get into the upper level extraction tank by the next stage extraction tank, each grade extraction tank 4 is being provided with a branch silk tooth 5 with its drainage mechanism 11 the same sides.Branch silk tooth 5 among the present invention is branch silk teeth commonly used in this area, and its number of teeth can suitably be selected according to practical application.In the present invention, in order to extract the multi beam precursor simultaneously, divide the number of teeth of silk tooth 5 to be preferably 5-200, more preferably 60-150.
In addition, can be provided with a compressed air hose 12 in each grade extraction tank bottom of the present invention's height groove multitple extraction device.Compressed air hose 12 produces bubble, and the liquid in the extraction tank is played stirring action, thereby improves extraction efficiency.Between adjacent two-stage extraction tank, can also be provided with steam pipe 9, be used for the humidity and the temperature of controlled atmospher.
On whole height groove multitple extraction device, can also add cover plate 6.The space (being provided with branch silk tooth 5, drainage mechanism 11, steam pipe 9 etc. in this space) that this cover plate 6 covers between each grade extraction tank and the adjacent extraction tank, thus height groove multitple extraction device of the present invention is sealed on the whole.Take this layout, effectively prevented the loss that causes by the extractant volatilization.
In the height groove multitple extraction device of Fig. 1, also show the structure that is used for the minimum one-level extraction tank 4 of the precursor that contains high boiling solvent 1 input, comprise branch silk tooth 5 (this branchs tooth is the same with the structure and the function of the branch silk tooth 5 described in the preceding text), be used to regulate former thread tension jockey pulley 2, be used to remove the pressing oil roll 3 etc. of the high boiling solvent of filament surfaces.The precursor 1 that contains high boiling solvent is divided into the multi beam precursor through undue silk tooth 5, behind jockey pulley 2 and pressing oil roll 3, is transfused in the minimum one-level extraction tank 4 beginning multitple extraction technology again.
3, height groove multitple extraction technology
In height groove multitple extraction technology of the present invention; Extractant 7 gets into from the extractant import 10 that is located at the highest extraction tank 4; Flow out from the extractant outlet 8 that is located at minimum extraction tank 4, and regulate the flow of extractant 4 and the liquid level of each grade extraction tank 4 at the drainage mechanism 11 of each grade extraction tank 4 bottoms.Simultaneously; The precursor 1 that contains high boiling solvent gets into minimum one-level extraction tank 4 with the form of multi beam precursor after dividing 5 fens silks of silk tooth, twine successively on the many extraction godets 13; Branch silk tooth between adjacent extraction tank 5 gets into upper level extraction tank 4 again, until finally coming out from the highest extraction tank 4.
The flow direction of the traffic direction of precursor 1 and extractant 7 is opposite; Therefore the running of precursor 1 from low extraction tank 4 to high extraction tank 4; The extractant 7 that the high boiling solvent that contains is extracted in the groove 4 is constantly replaced, the final precursor that contains extractant that forms.Along with the progress of extraction, the high boiling solvent that contains in the precursor 1 is constantly replaced, and therefore between the extraction tank 4 of precursor 1 operating path upstream and downstream, produces the concentration difference of the high boiling solvent that is extracted.In height groove multitple extraction technology of the present invention; To be arranged in the extractant 7 of precursor 1 operating path downstream (highly higher), extraction tank 4 that high boiling solvent concentration is lower; Constantly add to through drainage mechanism 11 and to be arranged in the precursor 1 operating path upper reaches (highly lower), the higher extraction tank 4 of high boiling solvent concentration; Extractant 7 is recycled, thereby has significantly improved the utilization rate of extractant 7.
In height groove multitple extraction technology of the present invention, be provided with the staggered many extraction godets 13 of height in each grade extraction tank 4, precursor 1 twines on the every extraction godet 13 successively, thereby fully contacts with extractant 7, realizes high extraction efficiency.And, because precursor only twines once on every extraction godet 13, need not to twine repeatedly repeatedly, thereby greatly reduced the chance that twines silk, therefore can extract multi beam (more than 100 bundles) precursor 1 simultaneously.
Height groove multitple extraction technology of the present invention is not limited to the multitple extraction of above-mentioned ultra-high molecular weight polyethylene gel fiber with device, so long as with the low boiling extractant precursor that contains high boiling solvent is extracted, all can adopt the present invention.
Claims (12)
1. height groove multitple extraction technology adopts the 3-8 level extraction tank of stepped placement from low to high, is provided with the staggered 3-20 root extraction godet of height in each grade extraction tank and holds extractant; Each grade extraction tank bottom is provided with drainage mechanism on an adjacent side with the next stage extraction tank; Be used for extractant is discharged into the next stage extraction tank, and each grade extraction tank is provided with branch silk tooth in the same side with drainage mechanism, the extractant import of high extraction tank gets into extractant from being arranged on; Flow out from the extractant outlet that is arranged on minimum extraction tank; And the precursor that contains high boiling solvent gets into from minimum extraction tank, is wrapped in successively on the extraction godet in the extraction tank, again through dividing the silk tooth to get into the upper level extraction tank successively; Finally come out from the highest extraction tank; Thereby with extractant the high boiling solvent that contains in the precursor is cemented out, form the precursor that contains extractant, the precursor that wherein contains high boiling solvent is the super high molecular weight polyethylene gel spinning precursor that contains white oil, paraffin oil or kerosene.
2. technology according to claim 1, wherein extractant is selected from gasoline, hydrocarbon, chloroform, carbon tetrachloride, tetrachloro-ethylene or trichorotrifluoroethane.
3. technology according to claim 1, wherein extractant is selected from xylenes and acetone.
4. technology according to claim 2, the precursor that wherein contains high boiling solvent are the super high molecular weight polyethylene gel spinning precursor that contains white oil, and extractant is 120
#Gasoline.
5. technology according to claim 1, wherein dividing the number of teeth of silk tooth is 5-300.
6. technology according to claim 1, wherein the number of extraction godet is 4-10 in each extraction tank.
7. height groove multitple extraction device; The 3-8 level extraction tank that comprises stepped placement from low to high is provided with the staggered 3-20 root extraction godet of height and holds extractant in every grade of extraction tank, be provided with the extractant import at the highest extraction tank; Be provided with the extractant outlet at minimum extraction tank; Each grade extraction tank bottom is provided with drainage mechanism on an adjacent side with the next stage extraction tank, and each grade extraction tank is provided with branch silk tooth in the same side with drainage mechanism, and the precursor that contains high boiling solvent that is extracted begins from minimum extraction tank; Be wrapped in successively on the extraction godet in the extraction tank; Through dividing the silk tooth to get into the upper level extraction tank successively, finally come out from the highest extraction tank, the precursor that wherein contains high boiling solvent is the super high molecular weight polyethylene gel spinning precursor that contains white oil, paraffin oil or kerosene again.
8. device according to claim 7, wherein extractant is selected from gasoline, hydrocarbon, chloroform, carbon tetrachloride, tetrachloro-ethylene or trichorotrifluoroethane.
9. device according to claim 7, wherein extractant is selected from xylenes and acetone.
10. device according to claim 8, the precursor that wherein contains high boiling solvent are the super high molecular weight polyethylene gel spinning precursor that contains white oil, and extractant is 120
#Gasoline.
11. device according to claim 7, wherein dividing the number of teeth of silk tooth is 5-300.
12. device according to claim 7, wherein the number of extraction godet is 4-10 in each extraction tank.
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| CN2009102498082A CN101757801B (en) | 2008-12-23 | 2009-11-27 | Process and device for extracting in multiple stages by high and low grooves |
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| CN200810240550.5 | 2008-12-23 | ||
| CN200810240550 | 2008-12-23 | ||
| CN2009102498082A CN101757801B (en) | 2008-12-23 | 2009-11-27 | Process and device for extracting in multiple stages by high and low grooves |
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| CN101757801A CN101757801A (en) | 2010-06-30 |
| CN101757801B true CN101757801B (en) | 2012-01-18 |
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| CN103866425A (en) * | 2014-03-06 | 2014-06-18 | 江苏九九久科技股份有限公司 | Solvent used by jelly spinning method in preparation of ultra-high-molecular-weight polyethylene fiber |
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| CN107899268A (en) * | 2017-12-01 | 2018-04-13 | 湖南中泰特种装备有限责任公司 | A kind of extracting process in preparing process of polyvinyl fibre |
| CN107899269A (en) * | 2017-12-01 | 2018-04-13 | 湖南中泰特种装备有限责任公司 | A kind of polyvinyl fibre abstraction device |
| CN111254523A (en) * | 2020-03-09 | 2020-06-09 | 江苏九九久科技有限公司 | Extraction method for fiber production |
| CN112121462A (en) * | 2020-10-23 | 2020-12-25 | 张洪江 | A reciprocal extraction equipment of multilayer for crops fermentation product |
| CN112337134A (en) * | 2020-10-29 | 2021-02-09 | 湖北国创高新材料股份有限公司 | Gradient extraction method for waste asphalt mixture oilstone separation |
| CN115055056A (en) * | 2022-05-27 | 2022-09-16 | 杭州特种纸业有限公司 | Automatic concentration control system for desalting tank |
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Denomination of invention: Multistage extraction process and equipment with high and low tanks Effective date of registration: 20201217 Granted publication date: 20120118 Pledgee: Hunan Linli rural commercial bank Limited by Share Ltd. Pledgor: Hunan Zhongtal Special Equipment Co.,Ltd. Registration number: Y2020430000043 |
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