CN104342785A - Dry spinning organic solvent recovery and air circulating use method - Google Patents
Dry spinning organic solvent recovery and air circulating use method Download PDFInfo
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- CN104342785A CN104342785A CN201410648877.1A CN201410648877A CN104342785A CN 104342785 A CN104342785 A CN 104342785A CN 201410648877 A CN201410648877 A CN 201410648877A CN 104342785 A CN104342785 A CN 104342785A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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Abstract
The invention relates to a dry spinning organic solvent recovery and air circulating use method. A spinning shaft is respectively provided with a circulating air intake opening and an organic solvent-containing waste air exhaust opening from top to bottom, wherein the organic solvent-containing waste air exhaust opening is sequentially connected with a hot air intake and exhaust opening of a heat exchanger, a circulating air high boiling organic solvent recovery assembly, an electric air valve, an air delivery fan, a cold air intake and exhaust opening of the heat exchanger, an air heater and the circulating air intake opening, a branch pipeline is connected with an air exhaust opening of the circulating air high boiling organic solvent recovery assembly and an exhaust air high boiling organic solvent recovery assembly, a branch pipeline is connected with a fresh air supplementing opening, the electric air valve for controlling fresh air, a fresh air cooler, and an air intake opening of the air delivery fan, and an organic solvent concentration detection instrument is arranged on a pipeline of the air exhaust opening of the circulating air high boiling organic solvent recovery assembly. The dry spinning organic solvent recovery and air circulating use method has the advantages that the solvent recovery cost is low, the running is safe and continuous, one part of air is exhausted to the outside, the negative pressure in the spinning shaft is formed, and other spinning devices are not needed by the spinning shaft.
Description
Technical field
The present invention relates to the waste gas treatment equipment of dry spinning containing organic solvent, specifically dry spinning organic solvent reclaims and air circulation operative installations.
Background technology
Chemical fibre has been widely used in production and the life of people, and such as, polyacrylonitrile is fine main is used as knitting wool, knitted fabric (pure spin or with wool blended) and woven fabric, is specially adapted to make interior decoration cloth, as curtain; And spandex thread be also widely used in coated, the bale of cotton and knitting on; The polyimide fiber developed recently manufactures high temperature air filter etc. because the temperature resistance of its uniqueness can be widely used in.
Spandex produces conventional dry spinning.Dry spinning is the method for conventional manufacturing chemistry fiber, and the spinning solution thread extruded from spinneret capillary during dry-spinning enters in spinning shaft.By the effect of high temperature gas flow in path, the solvent in stoste thread is volatilized fast, and the solvent vapo(u)r evaporated is taken away by hot gas stream.Stoste is solidified while sloughing solvent gradually, and elongation attenuates and forms as-spun fibre under the effect of winding tension.
Spandex can produce a large amount of gas containing organic solvent when producing, from these gases, reclaim organic solvent is important step in spandex production process.
Current domestic conventional freezing reclaims the organic solvent produced in spandex production process, specific practice is the waste gas utilizing the multistage cooling of the cooling water of different temperatures to discharge from spinning shaft, the first order utilizes circulating cooling water cooling, the second level utilizes 7 DEG C to freeze water cooling, and the third level utilizes-10 DEG C to freeze water cooling.Produce in solvent recovery process due to spandex and consume a large amount of chilled waters, so, spandex is produced solvent recovery unit and is consumed a large amount of electrical power for freezing, according to statistics, often producing 1 ton of spandex in Chinese PU Fiber industry needs to consume the chilled water of 1000KW electric power for generation of solvent recovery needs.Calculate according to the current spandex actual production of China, Chinese PU Fiber produces Solvents Solvent retracting device, consumes 400,000,000 kilowatt hour electric power every year.So spandex is produced solvent recovery unit and be there is huge energy-saving potential.
dry spinning method is produced in spandex process and is polluted greatly, and complex process, construction investment cost is too high, once the retracting device of organic solvent breaks down, must spandex be stopped immediately producing, cause huge waste.
Summary of the invention
The object of the invention is to for above-mentioned Problems existing and deficiency, thering is provided a kind of controls within safe range by the solvent strength of organic solvent in spinning shaft, and retracting device reliably operates and ensures that the dry spinning organic solvent that retracting device operates continuously reclaims and air circulation operative installations.
Above-mentioned purpose of the present invention is achieved by the following technical programs:
Dry spinning organic solvent reclaims and air circulation operative installations, and spinning river in Zhejiang Province is respectively equipped with circulating air air inlet from top to bottom, containing organic solvent exhaust vent, sequentially connect heat exchanger hot gas containing organic solvent exhaust vent to import and export, circulating air high boiling organic solvent reclaims assembly, MOD, breeze fan, heat exchanger cold air is imported and exported, air heater, circulating air air inlet, one connects circulating air high boiling organic solvent along separate routes reclaims assembly gas outlet, outer exhaust high boiling organic solvent reclaims assembly, one branch road connects fresh air and fills into mouth, control the MOD of fresh air, fresh air cooler, breeze fan air inlet, organic solvent concentration detecting instrument is located at circulating air high boiling organic solvent and reclaims on the pipeline of assembly gas outlet.
It is same components that circulating air high boiling organic solvent recovery assembly and outer exhaust high boiling organic solvent reclaim assembly, comprise the import connected by pipeline, the recirculated water aerial cooler processing air, molecular sieve concentration runner treatment region, process blower fan, floss hole, a bypass connects aerial cooler gas outlet, molecular sieve concentration runner cooling zone, regenerated air heater, molecular sieve concentration runner renewing zone, regeneration air cooler, regeneration blower fan, aerial cooler air inlet.
Molecular sieve concentration runner, it is disk-like shape, and by can the molecular sieve manufacture of absorbing organic solvent form, molecular sieve is manufactured into cellular, is manufactured into air ventilation passage along molecular sieve concentration runner axis direction.Gas successfully can flow through molecular sieve concentration runner along wheel axis direction.
Molecular sieve concentration runner is divided into three regions, i.e. treatment regions by the dividing plate of special manufacture, renewing zone and cooling zone, and molecular sieve concentration runner rotates under the drive of motor, and the sorbing material on runner is all the time at treatment region, and renewing zone, replaces rotation in cooling zone.
When the gas containing organic solvent flows through from molecular sieve concentration runner treatment region time, the organic solvent in gas is adsorbed by the sorbing material on runner, and gas becomes clean gas; When the hot gas of about about 180 DEG C of temperature flows through from rotary wheel regeneration district time, the organic solvent be adsorbed on runner can from desorption sorbing material out, be taken away by hot gas; When cryogenic gas flows through from runner cooling zone time, runner cooling zone is cooled, and the sorbing material on runner cooling zone recovers adsorption capacity.
The maximum advantage of molecular sieve concentration runner be the concentration of organic solvent from rotary wheel regeneration district gas be out enter organic solvent concentration in runner treatment region gas 3-30 doubly, and when being condensed recovery by the organic solvent in recirculated cooling water refrigerating gas after organic solvent concentration in regeneration gas reaches certain value.Another one advantage is through the degree that organic solvent content in the gas of runner treatment region can reach clean, and the gas after runner process can discharge when meeting environmental requirement.
Containing organic solvent air through process air recirculated water aerial cooler cooling after according to two diverted flow, a branch is flow through from molecular sieve concentration runner treatment region, becomes pure air after flowing through molecular sieve concentration runner treatment region, another one branch is flow through from molecular sieve concentration runner cooling zone, the sorbing material on runner is made to cool after flowing through molecular sieve concentration runner cooling zone, the air flow through from molecular sieve concentration runner cooling zone is after regenerated air heater heating, flow through the regneration of adsorbent material that molecular sieve concentration runner renewing zone makes on runner, through the air of regeneration air cooler by last again through molecular sieve concentration runner adsorption zone, air containing organic solvent reclaims assembly process through circulating air high boiling organic solvent, solvent in air is discharged in liquid form from the recirculated water aerial cooler and regeneration air cooler of process air.
The present invention is by above-mentioned structural design, and tool has the following advantages:
1, solvent recovery process does not need 7 DEG C of chilled waters and-10 DEG C of cryogenic freezing water, and solvent recovery cost significantly declines, often about 1000 kilowatts of production 1 ton of spandex power consumption minimizing/time.
2, retracting device can safety and stability, continuous operation, spandex produce take to cause waste because solvent recovery unit fault causes spinning river in Zhejiang Province to quit work suddenly during this device.
3, spinning shaft recyclegas is after solvent recovery unit process disclosed by the invention, in gas, organic solvent content is within 50 milligrams/cubic metre, part spinning river in Zhejiang Province recyclegas can directly be discharged in air, simultaneously because exhaust spinning shaft can form negative pressure, spinning shaft need not take other negative pressure to ensure means, without other exhaust apparatus.
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is that circulating air high boiling organic solvent reclaims assembly or outer exhaust high boiling organic solvent reclaims modular construction schematic diagram.
Detailed description of the invention
As shown in Figure 1, dry spinning organic solvent of the present invention reclaims and air circulation operative installations, comprises spinning river in Zhejiang Province and is respectively equipped with circulating air air inlet a from top to bottom, containing organic solvent exhaust vent b; The import and export of heat exchanger 1 hot gas, circulating air high boiling organic solvent recovery assembly 2, MOD 5, breeze fan 6, the import and export of heat exchanger 1 cold air, air heater 7, circulating air air inlet a is sequentially connected containing organic solvent exhaust vent b.Air heater 7 function be will deliver to spinning river in Zhejiang Province air heat to design temperature, breeze fan 6 function is that pure air is delivered to spinning river in Zhejiang Province.
One connects circulating air high boiling organic solvent along separate routes reclaims assembly 2 gas outlet, outer exhaust high boiling organic solvent reclaims assembly 4, it is identical that circulating air high boiling organic solvent recovery assembly 2 and outer exhaust high boiling organic solvent reclaim assembly 4, as shown in Figure 2, comprise the import I connected by pipeline, the recirculated water aerial cooler 2-3 of process air, molecular sieve concentration runner 2-2 treatment region, process blower fan 2-1, floss hole J, one bypass connects aerial cooler 2-3 gas outlet, molecular sieve concentration runner 2-2 cooling zone, regenerated air heater 2-6, molecular sieve concentration runner 2-2 renewing zone, regeneration air cooler 2-5, regeneration blower fan 2-4, aerial cooler 2-3 air inlet.
One branch road connects fresh air and fills into a mouthful d, controls MOD 9, fresh air cooler 8, breeze fan 6 air inlet of fresh air.Fresh air cooler 8 function utilizes chilled water to make fresh air cool-down dehumidification.
Organic solvent concentration detecting instrument 3 is located at circulating air high boiling organic solvent and reclaims on the pipeline of assembly 2 gas outlet.
When the present invention normally works, MOD 5 is opened, and the MOD 9 controlling fresh air is closed, fresh air cooler 8 stops logical chilled water, outer exhaust high boiling organic solvent reclaims assembly 4 and is in low frequency running status, is vented the process blower fan of high boiling organic solvent recovery assembly 4, regeneration blower fan and motor and is in low frequency running status namely.The air of discharging from b point first imports and exports cooling through heat exchanger 1 hot gas, then organic solvent is reclaimed through circulating air high boiling organic solvent retracting device 2, the air of about 90% is imported and exported through heat exchanger 1 cold air under the effect of breeze fan 6, eventually passes after air heater 7 heats and sends spinning river in Zhejiang Province back to from a point.The air of about 10% be vented outside high boiling organic solvent reclaim under the process fan action of assembly 4 through outer exhaust high boiling organic solvent reclaim assembly 4 further after recycling design from c point discharged to air.
When this device normally works, in the waste gas that circulating air high boiling organic solvent reclaims after assembly 2 process, organic solvent content is usually at 100mg/ m
3left and right, is through circulating air high boiling organic solvent from c point discharged to the air in the external world and reclaims assembly 2 and reclaims assembly 4 two-stage with outer exhaust high boiling organic solvent and recycle, thus in being vented organic solvent content at 10mg/m
3below.
When circulating air high boiling organic solvent reclaims assembly 2 due to aging or when there is random failure, the organic solvent concentration that organic solvent concentration detecting instrument 3 detects can increase, now the present invention completes following action automatically: the MOD 9 that (1) controls fresh air is opened, (2) chilled water is led to fresh air cooler 8, start as fresh air cool-down dehumidification, (3) be vented high boiling organic solvent outward and reclaim each fan operation frequency increase in assembly 4, make outer exhaust high boiling organic solvent reclaim assembly 4 and can process all waste gas of discharging from b point, (4) MOD 5 is closed automatically.
Reclaim after assembly 2 breaks down at circulating air high boiling organic solvent, all waste gas containing organic solvent of discharging from b point is all through outer exhaust high boiling organic solvent and reclaims after assembly 4 process from c point discharged to air; And be all take from d point from the circulating air that a point delivers to spinning river in Zhejiang Province.
According to actual needs, the present invention can multiple circulating air high boiling organic solvent reclaim assembly 2 parallel connection after connect again one outward exhaust high boiling organic solvent reclaim assembly 4.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (2)
1. dry spinning organic solvent reclaims and air circulation operative installations, it is characterized in that: spinning river in Zhejiang Province is respectively equipped with circulating air air inlet (a) from top to bottom, containing organic solvent exhaust vent (b), sequentially connect heat exchanger (1) hot gas containing organic solvent exhaust vent (b) to import and export, circulating air high boiling organic solvent reclaims assembly (2), MOD (5), breeze fan (6), heat exchanger (1) cold air is imported and exported, air heater (7), circulating air air inlet (a), one connects circulating air high boiling organic solvent along separate routes reclaims assembly (2) gas outlet, outer exhaust high boiling organic solvent reclaims assembly (4), one branch road connects fresh air and fills into mouth (d), control the MOD (9) of fresh air, fresh air cooler (8), breeze fan (6) air inlet, organic solvent concentration detecting instrument (3) is located at circulating air high boiling organic solvent and reclaims on the pipeline of assembly (2) gas outlet.
2. operative installations according to claim 1, it is characterized in that: it is same components that circulating air high boiling organic solvent recovery assembly (2) and outer exhaust high boiling organic solvent reclaim assembly (4), comprise the import (I) connected by pipeline, the recirculated water aerial cooler (2-3) of process air, molecular sieve concentration runner (2-2) treatment region, process blower fan (2-1), floss hole (J), one bypass connects aerial cooler (2-3) gas outlet, molecular sieve concentration runner (2-2) cooling zone, regenerated air heater (2-6), molecular sieve concentration runner (2-2) renewing zone, regeneration air cooler (2-5), regeneration blower fan (2-4), aerial cooler (2-3) air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648877.1A CN104342785A (en) | 2014-11-17 | 2014-11-17 | Dry spinning organic solvent recovery and air circulating use method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410648877.1A CN104342785A (en) | 2014-11-17 | 2014-11-17 | Dry spinning organic solvent recovery and air circulating use method |
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| CN104342785A true CN104342785A (en) | 2015-02-11 |
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| CN201410648877.1A Pending CN104342785A (en) | 2014-11-17 | 2014-11-17 | Dry spinning organic solvent recovery and air circulating use method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289905A (en) * | 2015-11-13 | 2016-02-03 | 马军 | Paint spraying air treatment system and method |
| CN113993610A (en) * | 2019-07-11 | 2022-01-28 | 杜尔***有限公司 | Apparatus and method for recovering solvent from drying process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103668489A (en) * | 2013-12-23 | 2014-03-26 | 马军 | Dry spinning organic solvent recovery and nitrogen recycling technology and device |
| CN103757752A (en) * | 2014-01-21 | 2014-04-30 | 马军 | Process and device for organic solvent recovery and air cycle use in dry spinning |
| CN203852996U (en) * | 2014-04-08 | 2014-10-01 | 马军 | Device for recycling organic solvent during preparation of polyimide film |
| CN204434793U (en) * | 2014-11-17 | 2015-07-01 | 马军 | Dry spinning organic solvent reclaims and air circulation operative installations |
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2014
- 2014-11-17 CN CN201410648877.1A patent/CN104342785A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668489A (en) * | 2013-12-23 | 2014-03-26 | 马军 | Dry spinning organic solvent recovery and nitrogen recycling technology and device |
| CN103757752A (en) * | 2014-01-21 | 2014-04-30 | 马军 | Process and device for organic solvent recovery and air cycle use in dry spinning |
| CN203852996U (en) * | 2014-04-08 | 2014-10-01 | 马军 | Device for recycling organic solvent during preparation of polyimide film |
| CN204434793U (en) * | 2014-11-17 | 2015-07-01 | 马军 | Dry spinning organic solvent reclaims and air circulation operative installations |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289905A (en) * | 2015-11-13 | 2016-02-03 | 马军 | Paint spraying air treatment system and method |
| CN105289905B (en) * | 2015-11-13 | 2018-05-18 | 马军 | A kind of spray painting air treatment system and method |
| CN113993610A (en) * | 2019-07-11 | 2022-01-28 | 杜尔***有限公司 | Apparatus and method for recovering solvent from drying process |
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Application publication date: 20150211 |