CN100585060C - Intermittent liquid ammonia finishing method and device - Google Patents
Intermittent liquid ammonia finishing method and device Download PDFInfo
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- CN100585060C CN100585060C CN200710130607A CN200710130607A CN100585060C CN 100585060 C CN100585060 C CN 100585060C CN 200710130607 A CN200710130607 A CN 200710130607A CN 200710130607 A CN200710130607 A CN 200710130607A CN 100585060 C CN100585060 C CN 100585060C
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- liquid ammonia
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Abstract
The invention relates to an intermittent-type liquid ammonia treatment method and the apparatus thereof. The method comprises feeding, sealing, vacuumizing, ammonia introduction, retention, ammonia discharge, washing and discharging steps. The method utilizes an ammonia storage tank and an intermediate ammonia storage tank. During the steps of ammonia introduction and retention, the pressure of a treating cylinder is 0.1-0.2MPa. The apparatus comprises a compressor, an oil-ammonia separator, a condenser, an ammonia storage tank, an intermediate ammonia storage tank, an air separator, a liquid ammonia separator, and a liquid ammonia treating cylinder. The treating cylinder has a working pressure of 0.1-0.2MPa. The intermediate ammonia storage tank and the ammonia storage tank are both connected with a liquid ammonia inlet of the treating cylinder. The intermediate ammonia storage tank is also connected with a liquid ammonia outlet of the treating cylinder. The inventive method and the apparatus are adapted to treat the liquid ammonia under low pressure, thereby simplifying the sealing process, improving the production efficiency, reducing the equipment cost and ensuring the safety. Additionally, the inventive method doesn't require the immobilization of materials to be treated and facilitates the feed/discharge process. The invention is used to treat fabrics and yarns and also used to directly treat fibers.
Description
Technical field
The present invention relates to a kind of method and apparatus of liquid ammonia finishing, specifically, the present invention relates to a kind of intermittent liquid ammonia finishing method and equipment.
Background technology
Cotton, flax fibre goods are best-selling in the world textiless always.Because it has good wearability, such as comfortable and easy to wear, ventilative, poisture-penetrability is good etc. (this is that chemical fibre is incomparable), and extremely people favor.But cotton, linen also has its significant disadvantages, is mainly reflected in firm, easy fold, morphological stability is poor, and linen has tangible prodding and itching feeling, and therefore, this has just greatly limited the ranks that Cotton and Linen enters grade textiles.Therefore, improve the morphological stability of linen-cotton textiles, flexibility is the target that dyeing and finishing worker in various countries' pursues always.It is wrinkling that present domestic application resin is organized in the shrink that can improve COTTON FABRIC to a certain extent, gives its good DIMENSIONAL STABILITY, but produce coarse feel simultaneously and reduce fiber strength, and the arrangement durability is bad.Liquid ammonia finishing then can be that the after-processing technology at center combines with pre-treatment process with the RESIN FINISH, fiber is carried out modification, when keeping the original fine quality of fiber, overcome that its flexibility is poor, extension at break is little, the shortcoming of morphological stability difference, improve its wearing comfort, thus people's attention extremely.
So-called liquefied ammonia is exactly liquid ammonia.Under normal pressure the gaseous ammonia temperature drop to-34 ℃ will liquefy ammonia.When 25 ℃ of normal temperature, the saturated vapor pressure of ammonia is 1.004MPa.The liquid ammonia finishing technology is exactly that the textiles of needs arrangement is positioned in the liquefied ammonia, the molecules align of fiber is changed, discharge the stress of fibrous inside, thereby the cotton fibriia form stable is got off, feel is greatly improved, the fabric high resilience.
At present, both at home and abroad the liquid ammonia finishing to fabric adopts the continous mode collator more, but this equipment not only invests greatly, and the ammonia recovery system operation and maintenance cost is also big.CN2597517 discloses a kind of intermittent liquid ammonia finishing equipment, mainly form by vertical solution ammonia react jar, circulating pump, Ammonia Compressor Unit, washing system and safety auto-controlled system, wherein, vertical solution ammonia react jar is by rotation cover, tank body, cover pressing mechanism, sealing device, Steam Heating import, form through shaft assembly etc., the cover pressing mechanism will rotate cover and tank body is tightly connected by sealing device above the rotation cover.Though this novel intermittent liquid ammonia finishing of having realized, because it is under high pressure to put in order, in order to guarantee processing safety, needing additionally pressurizes to cover guarantees sealing, and the tank body design difficulty is big, and therefore equipment cost rises; And pending fabric need be wound on fabric on axle according to certain force of strain through special-purpose coiler, hangs in then in the jar, docks with outer cone in the jar.Put again through the axle positioner at last, make through axle location and certain pressurization effect is arranged, in conjunction with deadweight, to guarantee that outer cone closely contacts in axle inner cone and jar through axle and fabric.Therefore operate and inconvenience, and only can be used to handle fabric.
Summary of the invention
Therefore, primary and foremost purpose of the present invention is to provide a kind of intermittent liquid ammonia finishing method, and this method is put in order under low relatively pressure, and is simple to operate, and sealing is easy and security is good.
Another object of the present invention is to provide a kind of both can handle fabric, yarn, can also directly handle the intermittent liquid ammonia finishing method of fiber.
In order to realize purpose of the present invention, a kind of intermittent liquid ammonia finishing method is provided, in airtight Liquid Ammonia Treatment jar, carry out, comprise charging, seal, vacuumize, lead to ammonia, maintenance, ammonia excretion, washing and blowing, it is characterized in that: described intermittent liquid ammonia finishing method uses an ammonia storage tank and a middle ammonia storage tank; The liquefied ammonia that injects in this Liquid Ammonia Treatment jar in the described logical ammonia process is mainly from this centre ammonia storage tank; The pressure of keeping in the jar by the gaseous ammonia of extracting out in this Liquid Ammonia Treatment jar in described logical ammonia and the maintenance process is 0.1-0.2Mpa; Described ammonia excretion comprises discharge opeing ammonia and row's gaseous ammonia, and the liquefied ammonia in the described discharge opeing ammonia process in the Liquid Ammonia Treatment jar enters in this centre ammonia storage tank.
The duration of maintenance step of the present invention decides according to the character and the requirement of pending thing, is preferably 1-30 minute.
Sealing of the present invention can be adopted sealing ring or other encapsulating methods, is preferably earlier the jar of this liquid ammonia finishing jar mouthful tightly with the cover lid, and then charges into the ammonia compressor refrigeration oil in the low temperature resistant sealing ring of the hollow between this jar mouth and this cover.Further preferred described low temperature resistant sealing ring is a silicone rubber O-ring.
Because method of the present invention need not pending thing is fixed, therefore can directly treating material be put into process tank during charging, earlier pending material is put into a metal cage with plural hole during preferred feedstock, again this metal cage is put into this Liquid Ammonia Treatment jar, taken out material so that handle the back.
In order to realize purpose of the present invention, a kind of intermittent liquid ammonia finishing equipment is provided, comprise compressor, oil ammonia separator, condenser, ammonia storage tank, air separator, ammonia liquor separator and Liquid Ammonia Treatment jar, it is characterized in that described Liquid Ammonia Treatment jar comprises tank body, cover, feed liquor ammonia mouth, discharge opeing ammonia mouth, row's gaseous ammonia mouth and vacuum pumping opening, its operating pressure is 0.1-0.2Mpa; Described compressor outlet links to each other with this oil ammonia separator, and its import links to each other with ammonia liquor separator; Ammonia storage tank in the middle of described liquid ammonia finishing equipment also comprises one, this centre ammonia storage tank all links to each other with the feed liquor ammonia mouth of this Liquid Ammonia Treatment jar with this ammonia storage tank, and this centre ammonia storage tank also links to each other with the discharge opeing ammonia mouth of this Liquid Ammonia Treatment pot bottom; This centre ammonia storage tank comprises a Pressure control mouth, and this Pressure control mouth links to each other with ammonia liquor separator with oily ammonia separator.
Contacted place of cover of the present invention and tank body and tank body and the contacted place of cover preferably are equipped with groove, are provided with the low temperature resistant sealing ring of hollow in this groove.
The inner bottom surface of tank body of the present invention is preferably the plane, disposes a columniform metal cage on this plane; It is porose to distribute on the described metal cage.
Method of the present invention can be used for handling fabric, yarn, also is fit to directly handle fiber, especially directly handles flax fibre, and the wrinkling ability of fabric anti-shrinkage that makes with the fiber after handling is strong.
Beneficial effect of the present invention is: since liquefied ammonia at normal temperatures saturated vapor pressure reach more than the 1.0MPa, and the environment that equipment will move often will be higher than 25 degrees centigrade of normal temperature, the saturated vapor pressure of ammonia can be higher, for guaranteeing that ammonia is liquid, under operating ambient temperature, if adopt the form of high pressure, design pressure that certainly will tank body will reach 2.2MPa, sealing under this condition comparatively bothers, and production efficiency is lower, and equipment cost also significantly rises.Adopt method and apparatus of the present invention, jar interior pressure remains on 0.1-0.2Mpa in logical ammonia and the maintenance process, puts in order under this low pressure condition, seal process is simple relatively on the one hand, improved production efficiency, equipment cost is reduced on the other hand, and security simultaneously also can be guaranteed.In addition, method and apparatus of the present invention need not pending thing is fixed, charging, and blowing is all convenient relatively, not only can handle fabric, yarn, can also directly handle fiber.
Further specify the present invention below in conjunction with the accompanying drawing and the specific embodiment, described embodiment is used to explain the present invention, and unrestricted the present invention.
Description of drawings
Fig. 1 is an equipment schematic diagram of the present invention;
Fig. 2 is the schematic cross-section of process tank of the present invention sealing place.
The specific embodiment
Embodiments of the invention 1 see also Fig. 1, comprise ammonia compressor 1, oily ammonia separator 2, condenser 3, ammonia storage tank 4, process tank 5, cover 6, vacuum pumping opening 7, air separator 8, ammonia liquor separator 9, middle ammonia storage tank 10, tank body 11, process tank feed liquor ammonia mouth 12, process tank discharge opeing ammonia mouth 13, process tank row's gaseous ammonia mouth 14 and Pressure control mouth 15.As shown in the figure, the air inlet of compressor 1 links to each other with ammonia liquor separator 9, and the gas outlet links to each other with oily ammonia separator 2; Ammonia liquor separator 9 links to each other with condenser 3, and condenser 3 links to each other with ammonia storage tank 4 again; Ammonia storage tank 4 all links to each other with the feed liquor ammonia mouth 12 of process tank 5 with middle ammonia storage tank 10, and the discharge opeing ammonia mouth 13 of process tank links to each other with middle ammonia storage tank 10, and row's gaseous ammonia mouth 14 of process tank links to each other with ammonia liquor separator 9, also has vacuum pumping opening 7 on the process tank 5; Entire equipment is provided with air separator 8 at appropriate location, and its outlet links to each other with ammonia liquor separator 9; The discharge opeing ammonia mouth of ammonia liquor separator 9 bottoms links to each other with middle ammonia storage tank 10; Middle ammonia storage tank 10 is provided with Pressure control mouth 15, and it links to each other with the outlet of oily ammonia separator 2 and the import of ammonia liquor separator 9 respectively.
During the device first operation, earlier process tank is vacuumized, from ammonia storage tank 4, in process tank 5, feed liquefied ammonia again, the pressure of opening ammonia compressor 1 maintenance process tank when leading to ammonia is 0.1-0.2Mpa, owing to controlled the pressure of process tank 5 and in ammonia storage tank 4, fed condensed liquefied ammonia simultaneously, can guarantee finishing of logical ammonia first.Liquefied ammonia is mainly finished circulation between middle ammonia storage tank 10 and process tank 5 afterwards, just introduces liquefied ammonia from ammonia storage tank 4 in case of necessity.Owing to just having begun to be evacuated, process tank in logical ammonia process is in negative pressure state, pressure afterwards is maintained at 0.1-0.2Mpa again, and the saturated vapor pressure owing to liquefied ammonia is higher in the middle ammonia storage tank, pressure is about 1Mpa, so liquefied ammonia is pressed into process tank 5, the air intake valve of the mouth of opening pressure control in case of necessity 15 feeds the High Temperature High Pressure gaseous ammonia through compressor 1 compression in middle ammonia storage tank 10, to guarantee finishing of logical ammonia process.At first open the balanced valve of 10 of process tank 5 and middle ammonia storage tanks during ammonia excretion, and then the return valve of unlatching process tank 5 bodies bottom, free liquid ammonia relies on deadweight to flow to middle ammonia storage tank 10, gaseous ammonia in the middle of the valve of giving vent to anger of the mouth of opening pressure control in case of necessity 15 is extracted out in the ammonia storage tank 10 is to guarantee finishing of discharge opeing ammonia process.Close balanced valve and return valve after free liquefied ammonia flows to end, remaining ammonia reclaims by ammonia compressor.
Mode to present embodiment describes below:
Charging: pending flax fibre is put into cylindrical metal cage with holes, then metal cage is put on the base plane of process tank 5;
Sealing: covering tight cover 6, is the silicone rubber O-ring of hollow between cover 6 and the tank body 11, and has one to be exposed at a jar outer oil-filled mouth 16, as Fig. 2, charges into 46 refrigeration oils to sealing ring and heave fully in this oil-filled mouthful, and the slit of sealing place is filled up;
Vacuumize: adopt vavuum pump by vacuum pumping opening 7 with the pressure drop in the process tank 5 to about 1000pa;
Logical ammonia: feed liquefied ammonia from middle ammonia storage tank 10 in process tank 5, and open ammonia compressor 1 simultaneously, keeping the pressure in the process tank 5 is 0.2Mpa;
Keep: the liquefied ammonia in pending jar 5 stops logical liquefied ammonia after with the flax fibre submergence, and keeps 20 minutes, and the pressure in ammonia compressor 1 is held open and keeps jar in this process is 0.2Mpa;
Ammonia excretion: the retention time is opened the balanced valve of 10 of process tank 5 and middle ammonia storage tanks later earlier, and then the return valve of unlatching process tank 5 bodies bottom, free liquid ammonia relies on deadweight to flow to middle ammonia storage tank 10, closes balanced valve and return valve after free ammonia flows to end.Open ammonia compressor 1 then with row's residue ammonia, by the chuck on the process tank 5 (not expression on the figure) process tank 5 is carried out Steam Heating simultaneously, drain fully until ammonia;
Washing: wash process tank 5 and fiber with water, the water after the washing is preserved and focused on.
Blowing: take out flax fibre, and with its oven dry.
According to the processing method of embodiment 1, difference is:
What present embodiment was handled is bamboo fibre;
Keeping jar interior pressure when logical ammonia and maintenance is 0.15Mpa, and the retention time is 30 minutes;
According to the processing method of embodiment 1, difference is:
What present embodiment was handled is COTTON FABRIC;
Directly COTTON FABRIC is put into process tank 5 during charging;
Be viton seal ring between cover 6 and the tank body 11 during sealing;
Pressure when logical ammonia and maintenance in the jar is 0.1Mpa, and the retention time is 10 minutes;
Above embodiment only is better embodiment of the present invention, and the present invention also can be provided with oil catcher, promptly rushes down ammonia device etc.; Can charge into other refrigeration oils in the sealing ring or adopt the sealing ring of other low temperature materials; Can adopt other containers of similar porous metals cage etc.These simple increases and replacement all should fall within protection scope of the present invention.
Claims (9)
1, a kind of intermittent liquid ammonia finishing method, in airtight Liquid Ammonia Treatment jar, carry out, comprise charging, seal, vacuumize, lead to ammonia, maintenance, ammonia excretion, washing and blowing, it is characterized in that: described intermittent liquid ammonia finishing method uses an ammonia storage tank and a middle ammonia storage tank; The liquefied ammonia that injects in this Liquid Ammonia Treatment jar in the described logical ammonia process is mainly from this centre ammonia storage tank; The pressure of keeping in the jar by the gaseous ammonia of extracting out in this Liquid Ammonia Treatment jar in described logical ammonia and the maintenance process is 0.1-0.2Mpa; Described ammonia excretion comprises discharge opeing ammonia and row's gaseous ammonia, and the liquefied ammonia in the described discharge opeing ammonia process in the Liquid Ammonia Treatment jar enters in this centre ammonia storage tank; Described sealing is meant that the jar mouth with this liquid ammonia finishing jar is tight with the cover lid earlier, and then charges into the ammonia compressor refrigeration oil in the low temperature resistant sealing ring of the hollow between this jar mouth and this cover.
2, intermittent liquid ammonia finishing method according to claim 1 is characterized in that: the duration of described maintenance is 10-30 minute.
3, method according to claim 1 is characterized in that: described low temperature resistant sealing ring is a silicone rubber O-ring.
4, method according to claim 1 is characterized in that: described charging is meant puts into a metal cage with holes with pending material earlier, this metal cage is put into this Liquid Ammonia Treatment jar again.
5, according to claim 1 or 4 described methods, it is characterized in that: pending material is a fiber in the described charging.
6, a kind of intermittent liquid ammonia finishing equipment, comprise compressor, oil ammonia separator, condenser, ammonia storage tank, air separator, ammonia liquor separator and Liquid Ammonia Treatment jar, it is characterized in that, described Liquid Ammonia Treatment jar comprises tank body, cover, feed liquor ammonia mouth, discharge opeing ammonia mouth, row's gaseous ammonia mouth and vacuum pumping opening, and its operating pressure is 0.1-0.2Mpa; Described compressor outlet links to each other with this oil ammonia separator, and its import links to each other with ammonia liquor separator; Described condenser links to each other with described ammonia storage tank; Described air separator outlet links to each other with ammonia liquor separator; Row's gaseous ammonia mouth of described Liquid Ammonia Treatment jar links to each other with the liquefied ammonia separator; Ammonia storage tank in the middle of described liquid ammonia finishing equipment also comprises one, this centre ammonia storage tank all links to each other with the feed liquor ammonia mouth of this Liquid Ammonia Treatment jar with this ammonia storage tank, and this centre ammonia storage tank also links to each other with the discharge opeing ammonia mouth of this Liquid Ammonia Treatment pot bottom; This centre ammonia storage tank comprises a Pressure control mouth, and this Pressure control mouth links to each other with the liquefied ammonia separator with oily ammonia separator.
7, equipment according to claim 6 is characterized in that: contacted place of described cover and tank body and tank body and the contacted place of cover are equipped with groove, are provided with the low temperature resistant sealing ring of hollow in this groove.
8, equipment according to claim 6 is characterized in that: the inner bottom surface of described tank body is the plane, disposes a columniform metal cage on this plane; It is porose to distribute on the described metal cage.
9, equipment according to claim 6 is characterized in that: the material of described device processes is a fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710130607A CN100585060C (en) | 2007-07-10 | 2007-07-10 | Intermittent liquid ammonia finishing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710130607A CN100585060C (en) | 2007-07-10 | 2007-07-10 | Intermittent liquid ammonia finishing method and device |
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| Publication Number | Publication Date |
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| CN101105001A CN101105001A (en) | 2008-01-16 |
| CN100585060C true CN100585060C (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710130607A Expired - Fee Related CN100585060C (en) | 2007-07-10 | 2007-07-10 | Intermittent liquid ammonia finishing method and device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101591844B (en) * | 2009-06-24 | 2013-04-17 | 中国人民解放军总后勤部军需装备研究所 | Liquid ammonia treatment device and using method thereof |
| CN102926148B (en) * | 2012-11-12 | 2013-07-24 | 无锡市天然绿色纤维科技有限公司 | Ammonia continuous mercerizing machine and processing method of fiber braid |
| CN103938382B (en) * | 2014-04-25 | 2016-04-06 | 何炽斌 | A kind of pencil yarn liquid ammonia treatment process and pencil yarn Liquid Ammonia Treatment machine |
| CN113605011B (en) * | 2021-07-28 | 2023-06-09 | 武汉纺织大学 | Continuous liquid ammonia finishing device and method for improving hydrophilicity of cotton non-woven fabric |
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| CN101105001A (en) | 2008-01-16 |
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