CN101880925B - Method and device for recovering mixed solvent in gel spinning - Google Patents
Method and device for recovering mixed solvent in gel spinning Download PDFInfo
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- CN101880925B CN101880925B CN201010208990XA CN201010208990A CN101880925B CN 101880925 B CN101880925 B CN 101880925B CN 201010208990X A CN201010208990X A CN 201010208990XA CN 201010208990 A CN201010208990 A CN 201010208990A CN 101880925 B CN101880925 B CN 101880925B
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Abstract
The invention relates to a method for recovering mixed solvent in gel spinning, which comprises the following steps: steam distillation, condensation, oil and water separation and a plurality of times of circulation until the mixed solvent is fully separated. A device for recovering the mixed solvent in gel spinning comprises a steam tank, a distillation column, a mixed solvent tank, a condenser, an oil and water separator, an extraction solvent storage tank, a reflux pump, a heavy oil tank, an explosion-proof oil pump, a white oil storage tank, a reservoir and a cooling water tower. The invention has the advantages that: 1. a steam heating method is adopted to continuously produce so that the output is increased by 3 to 3.5 times in the same scale; and the recovery cost is low; and 2. after recycling twice in the steam heating method, the gasoline and white oil in the mixed solve can be recycled after being separated.
Description
Technical field
The present invention relates to chemical industry method for recovering solvents and equipment thereof, the recovery method and the device thereof of mixed solvent in particularly a kind of gel spinning.
Background technology
Present domestic frozen glue spins the production process route of high-strength high-modulus polyethylene fiber; Be to be mixed into suspension mostly with paraffin oil, paraffin, kerosene and ultra-high molecular weight polyethylene powder; Through swelling, be dissolved into half weak solution after spinneret orifice is quantitatively extruded, quenching becomes the frozen glue precursor to spinning solution then.With extractant (120# gasoline, hydrocarbon etc.) solvent in its precursor (paraffin etc.) is cemented out again.Process in that high-strength high-modulus polyethylene fiber is produced in large-scale industrialization will produce a large amount of solvents, extractant mixed solvent, and as can not this mixed solvent being carried out recycling, the production cost of this fiber will significantly increase.The competitiveness of product on market reduces, and is unfavorable for environmental protection again.
For solving the Separation and Recovery of above-mentioned miscible oil, the recovery method of employing is the way of distillation at present: intermixture is placed with electric heating tube insert the still that conduction oil is heated, when intermixture is heated to uniform temperature; Gasoline volatilization in the mixed solvent becomes gas, again through condenser, the industrial naptha of gaseous state is condensed into the gasoline of liquid state; Be recycled; And the remaining small quantities of gasoline solvent that also contains can not recycle, can only undersell, and its price difference is about 4000 yuan/ton.And shortcomings such as this recovery method existence yields poorly, cost recovery height.
Summary of the invention
In order to overcome the deficiency that above-mentioned technology exists; The purpose of this invention is to provide and a kind of solvent in the mixed solvent is separated fully with extractant; And respectively recycle repeatedly, the recovery method and the device thereof of the mixed solvent that the product quality of being produced is had no effect.
Technical scheme of the present invention is: the recovery method of mixed solvent in a kind of gel spinning, and its concrete grammar is: steam rectifying, condensation, water-oil separating, separate until mixed solvent through repeatedly circulating fully.
The retracting device of mixed solvent in a kind of gel spinning comprises vapor can, rectifying column, mixed solvent jar, condenser, oil water separator, extractant storage tank, reflux pump, heavy oil tank, explosion-proof oil pump, white oil storage tank, cistern and cooling tower, it is characterized in that; Vapor can links to each other with rectifying column with rectifying column respectively through pipeline, and the mixed solvent jar communicates with rectifying column through explosion-proof oil pump, and the rectifying column top links to each other with condenser through pipeline; Condenser links to each other with oil water separator, and oil water separator links to each other with the extractant storage tank, links to each other with rectifying column through reflux pump in the oil water separator; The rectifying column lower end links to each other with condenser, and condenser links to each other with heavy oil tank, and heavy oil tank communicates with rectifying column through explosion-proof oil pump; Rectifying column links to each other with condenser through pipeline; Condenser links to each other with oil water separator, links to each other with the pipeline of rectifying column through reflux pump in the oil water separator, and oil water separator links to each other with the white oil storage tank with the extractant storage tank respectively; The white oil storage tank links to each other with the mixed solvent jar; Cistern top is equipped with a cooling tower, and cistern links to each other with an end of each condenser through water pipe, and the other end of each condenser is communicated with cooling tower through water pipe.
Advantage of the present invention is: 1, adopt the steam heating method to produce continuously, output increases 3-3.5 doubly under the identical scale situation; Cost recovery is low, 2, the steam heating method after twice circulation reclaimed, the gasoline in the mixed solvent all can utilize with after white oil separates again.
Description of drawings
Fig. 1 is a retracting device annexation sketch map of the present invention.
The specific embodiment
Combine accompanying drawing at present, technology contents of the present invention is described further.
(1), steam rectifying for the first time: at first the steam with 0.2-0.25Mpa pressure in the vapor can 1 injects rectifying column 2.1; After treating the interior temperature stabilization of tower; Beginning is injected rectifying column 2.1 with mixed solvent in the mixed solvent jar 3 through explosion-proof oil pump 9.1 continuously; The most of vaporization rapidly of extractant in the mixed solvent gets in the condenser 4.1 through the cat head conduit with part steam.
(2), condensation for the first time: the extractant of gasification and steam are condensed into liquid state in condenser 4.1.
(3), water-oil separating for the first time: the oil-water mixture of liquefaction obtains pure extractant and is recycled in the extractant storage tank 6.1 behind oil water separator 5.1, and oil water separator 5.1 links to each other with rectifying column 2.1 through reflux pump 7.1, so that gas backstreaming.
(4), steam rectifying for the second time: also contain a small amount of extractant in the mixed solvent in the rectifying column 2.1 after the steam rectifying for the first time, get into heavy oil tank 8, be injected in the rectifying column 2.2 through explosion-proof oil pump 9.2 again through condenser 4.2 coolings; This moment, the steam with 0.35Mpa pressure injected rectifying column 2.2; After treating the interior temperature stabilization of tower; The interior temperature of tower this moment wants high than the temperature of rectifying column 2.1; Extractant in the rectifying column 2.2 in the mixed solvent all is vaporized, and the low molecule white oil of the few part in the mixed solvent also is vaporized, and together gets in the condenser 4.3 through the conduit of cat head together with extractant gas.
(5), condensation for the second time: the extractant of gasification and white oil and steam are condensed into liquid state in condenser 4.3, obtain the mixture of extractant, low molecule white oil and water.
(6), water-oil separating for the second time: link to each other with rectifying column 2.2 through reflux pump 7.2 in the oil water separator 5.2, be convenient to gas backstreaming; The mixture of extractant, low molecule white oil and water separates through oil water separator 5.2; The pure extractant of part is recovered in the extractant storage tank 6.2; Water is discharged from; And fraction extractant and white oil mixture flow into white oil holding vessel 10, and the rectifying column 2.1 that can reinject reclaims until extractant again and separates fully with white oil.
(7), obtain clean solvent: reclaim through twice steam rectifying, remaining solvent does not then contain any extractant in this moment rectifying column, promptly becomes pure solvent, after our company's patent No. 200810143039.3 patented methods reclaim, recycling.
Claims (1)
1. the recovery method of mixed solvent in the gel spinning, its concrete grammar is:
(1), steam rectifying for the first time: at first the steam with the interior 0.2-0.25Mpa pressure of vapor can (1) injects the rectifying column (2.1) of steam rectifying for the first time; After treating the interior temperature stabilization of tower; The rectifying column (2.1) of the steam rectifying first time is injected the interior mixed solvent of mixed solvent jar (3) in beginning continuously through the explosion-proof oil pump (9.1) of steam rectifying for the first time; The most of vaporization rapidly of extractant in the mixed solvent gets in the condenser condensing first time (4.1) through the cat head conduit with part steam;
(2), condensation for the first time: the extractant of gasification and steam are condensed into liquid state in condenser (4.1);
(3), water-oil separating for the first time: the oil-water mixture of liquefaction is behind the oil water separator (5.1) of the water-oil separating first time; Obtain in the extractant storage tank (6.1) that pure extractant is recycled to water-oil separating for the first time; Oil water separator (5.1) links to each other with the rectifying column (2.1) of steam rectifying for the first time through the reflux pump (7.1) of water-oil separating for the first time, so that gas backstreaming;
(4), steam rectifying for the second time: also contain a small amount of extractant in the mixed solvent in the rectifying column (2.1) after the steam rectifying for the first time; Condenser (4.2) cooling in steam rectifying for the second time gets into heavy oil tank (8), and the explosion-proof oil pump (9.2) through steam rectifying for the second time is injected in the rectifying column (2.2) of steam rectifying for the second time again; This moment, the steam with 0.35Mpa pressure injected the rectifying column (2.2) of steam rectifying for the second time; After treating the interior temperature stabilization of tower; The interior temperature of the tower this moment temperature of the rectifying column (2.1) of steam rectifying for the first time wants high; Extractant in the interior mixed solvent of rectifying column (2.2) of steam rectifying all is vaporized for the second time, and the low molecule white oil of the few part in the mixed solvent also is vaporized, and together gets in the condenser condensing second time (4.3) through the conduit of cat head together with extractant gas;
(5), condensation for the second time: the extractant of gasification and white oil and steam are condensed into liquid state in the condenser condensing second time (4.3), obtain the mixture of extractant, low molecule white oil and water;
(6), water-oil separating for the second time: link to each other through the rectifying column (2.2) of the reflux pump (7.2) in the water-oil separating for the second time in the oil water separator (5.2) in the water-oil separating for the second time, be convenient to gas backstreaming with steam rectifying for the second time; The mixture of extractant, low molecule white oil and water separates through oil water separator (5.2); The pure extractant of part is recovered in the extractant storage tank (6.2) in the water-oil separating for the second time; Water is discharged from; And fraction extractant and white oil mixture flow into white oil holding vessel (10), and the rectifying column (2.1) of the steam rectifying first time of can reinjecting reclaims until extractant again and separates fully with white oil;
(7), obtain clean solvent: reclaim through twice steam rectifying, remaining solvent does not then contain any extractant in the rectifying column (2.2) of this moment of steam rectifying for the second time, promptly becomes pure solvent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010208990XA CN101880925B (en) | 2010-06-21 | 2010-06-21 | Method and device for recovering mixed solvent in gel spinning |
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| CN201010208990XA CN101880925B (en) | 2010-06-21 | 2010-06-21 | Method and device for recovering mixed solvent in gel spinning |
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| CN101880925B true CN101880925B (en) | 2012-06-20 |
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| CN102225904B (en) * | 2011-04-22 | 2013-11-27 | 天津美科泰化工科技有限公司 | Recovering and refining apparatus and separation method of dimethyl sulfoxide (DMSO) |
| CN103628184B (en) * | 2012-08-23 | 2016-03-02 | 中国石油化工股份有限公司 | Ultra-high molecular weight polyethylene dry spinning frozen glue and waste silk solvent recovery treatment process |
| CN107866088B (en) * | 2017-11-24 | 2021-04-06 | 南京工业大学 | Membrane method-rectification coupling separation and recovery method for gel fiber solvent and extractant |
| CN108218658B (en) * | 2018-03-20 | 2023-12-19 | 浙江省天正设计工程有限公司 | Integrated acetylene recycling device and process |
| CN113502568B (en) * | 2021-05-11 | 2023-05-12 | 浙江毅聚新材料有限公司 | Method and equipment for separating white oil contained in ultra-high molecular weight polyethylene fiber gel silk |
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| CA1090046A (en) * | 1976-12-09 | 1980-11-18 | Clarence W. Young, Iii | Fabric dye stripping, separation and recovery of polyester |
| CN101363146B (en) * | 2008-09-28 | 2010-06-16 | 湖南中泰特种装备有限责任公司 | Spinning dissolvant white oil recovery technology |
| CN201809499U (en) * | 2010-06-21 | 2011-04-27 | 湖南中泰特种装备有限责任公司 | Recovering unit of mixed solvent in jelly spinning |
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Denomination of invention: The invention relates to a method for recovering mixed solvent in gel spinning and a device thereof Effective date of registration: 20201217 Granted publication date: 20120620 Pledgee: Hunan Linli rural commercial bank Limited by Share Ltd. Pledgor: Hunan Zhongtal Special Equipment Co.,Ltd. Registration number: Y2020430000043 |
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