CN202470623U - Low temperature device based on small-sized low temperature refrigerating machine for gas separation and purification - Google Patents
Low temperature device based on small-sized low temperature refrigerating machine for gas separation and purification Download PDFInfo
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- CN202470623U CN202470623U CN201220042433XU CN201220042433U CN202470623U CN 202470623 U CN202470623 U CN 202470623U CN 201220042433X U CN201220042433X U CN 201220042433XU CN 201220042433 U CN201220042433 U CN 201220042433U CN 202470623 U CN202470623 U CN 202470623U
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Abstract
The utility model discloses a low temperature device based on a small-sized low temperature refrigerating machine for gas separation and purification. The low temperature device comprises a first-level heat exchanger, a second-level heat exchanger, a four-level heat exchanger, at least one small-sized low temperature refrigerating machine and at least a liquid collecting tank. The small-sized low temperature refrigerating machine comprises a first cold head and a second cold head. The second-level heat exchanger is arranged on the first cold head to form a first-level cold head heat exchanger, the four-level heat exchanger is arranged on the second cold head to form a second-level cold head heat exchanger, a mixed gas outlet is connected to an inlet of the first-level cold head heat exchanger, an outlet of the first-level cold head heat exchanger is connected to the inlet of the liquid collecting tank, and a gas outlet of the liquid collecting tank is connected to the inlet of the second-level cold head heat exchanger. In the low temperature device, a first-level cold head and a second-level cold head of the small-sized low temperature refrigerating machine are used as the cold sources for respectively liquefying and solidifying the gases with different condensing temperatures so as to obtain a high-purity gas with lower condensing temperature, and then separation and purification of two or a plurality of gases can be realized with lower cost.
Description
Technical field
The utility model relates to the Cryo Equipment of a kind of gas separation and purifying, especially a kind of Cryo Equipment that is used for gas separation and purifying based on small-sized Cryo Refrigerator.
Background technology
The separation of each component gas and purifying are the basic process that obtains high-purity (volumn concentration 99.999% or more than) gas in the impure unstripped gas.Usually utilize the difference between each component gas condensation temperature and the molecular property to separate, traditional method has: rectification method, fractional condensation method, absorption method, catalytic reaction method etc.When product gas requires purity higher, need several method to unite use, method that combines like high pressure low temperature condensation and cryogenic absorption or the method that the transformation under the normal temperature is adsorbed and cryogenic absorption combines etc.Traditional isolation and purification method flow process is complicated, and cost of investment is high, is generally used for large-scale gas separation and purification equipment.
In general, the separation of rare gas such as helium, neon and purifying also are based on above several kinds of common methods.In the rare gas, rare gas such as helium, neon have very important application in fields such as Aeronautics and Astronautics, military affairs and scientific researches, and demand increases day by day.Importantly China belongs to poor helium country, and the U.S. classifies helium as strategic resource as main in the world helium out state.Therefore, the recycling of helium just seems particularly important; In addition, from air separation unit, extracting is one of approach of industry acquisition helium, neon.
For the helium that reclaims, its purity is about 90%, and all the other mainly are foreign gases such as air.The helium of this purity can't directly use usually, needs through special separation and purifying flow process.For the separation and the purifying of helium, neon in the air separation unit, conventional method generally comprises preparation and the pure helium of the extraction of raw helium neon gaseous mixture, pure He-Ne gaseous mixture, three operations of preparation of pure neon.The three process flow process is more complicated all, and cost of investment is high, lacks economy, generally seldom is applied in the actual air separation unit.
Small-sized Cryo Refrigerator generally comprises the GM refrigeration machine, vascular refrigerator, sterlin refrigerator, J-T refrigeration machine etc.Generally at 0 –, 80 K (273.15 ℃ –-193.15 ℃), refrigerating capacity is greatly about 0.1 –, 100 W for the cryogenic temperature scope of small-sized Cryo Refrigerator.Small-sized Cryo Refrigerator is the visual plant that obtains utmost point low temperature.The gas that is used for based on small-sized Cryo Refrigerator separates and then to be suitable for small-sized gas with the Cryo Equipment of purifying and to separate and purifying.
Summary of the invention
The utility model provides a kind of method that is used for gas separation and purifying based on small-sized Cryo Refrigerator.Traditional separation and purification schemes have been improved; With the first order of small-sized Cryo Refrigerator and second level cold head as low-temperature receiver; The gas of different condensation temperatures is liquefied respectively and solidifies; Thereby obtain the lower high-purity gas of condensation temperature (as: helium), the higher high-purity gas of other condensation temperature that has liquefied can obtain equally.So just can use lower one-tenth to realize the separation and the purifying of two or more gases originally.
The technical scheme of the utility model is:
A kind of Cryo Equipment that is used for gas separation and purifying based on small-sized Cryo Refrigerator; It is characterized in that: comprise first-class heat exchanger, secondary heat exchanger, level Four heat exchanger, at least one small-sized Cryo Refrigerator and at least one liquid collecting jar; Described small-sized Cryo Refrigerator comprises first cold head and second cold head; Described secondary heat exchanger is arranged on and forms the one-level cold header heat exchanger on described first cold head; Described level Four heat exchanger is arranged on and forms the secondary cold header heat exchanger on second cold head; Described first-class heat exchanger is provided with behind mist import, mixed gas outlet, the purifying gas vent behind gas feed and the purifying; Described mixed gas outlet is connected to described one-level cold header heat exchanger inlet, and the outlet of one-level cold header heat exchanger connects the inlet of said liquid collecting jar, and liquid collecting jar gas vent is connected to the import of secondary cold header heat exchanger; Secondary cold header heat exchanger outlet is connected to gas one import behind the first-class heat exchanger cold junction purifying, and the first-class heat exchanger hot junction is gas one outlet behind the purifying.
Between described liquid collecting jar gas vent and the import of secondary cold header heat exchanger, also be provided with one or three grades of heat exchangers, the outlet of described secondary cold header heat exchanger also is connected to gas one import behind the first-class heat exchanger cold junction purifying through described three grades of heat exchangers.
Also comprise another refrigeration machine; This another refrigeration machine comprises one-level heat exchange jar that is positioned at first cold head and the secondary heat exchange jar that is positioned at second cold head; Gas one import behind the cold junction purifying of one-level cold header heat exchanger entering first-class heat exchanger of the liquid outlet of described liquid collecting jar; The gas vent of described liquid collecting jar is connected to the import of described secondary cold header heat exchanger through described one-level heat exchange jar; The outlet of secondary cold header heat exchanger connects another liquid collecting jar; The gas vent of this another liquid collecting jar is connected to gas two imports behind the cold junction purifying of first-class heat exchanger through described secondary heat exchange jar, the liquid outlet of said another liquid collecting jar gets into gas triple feed inlet behind the cold junction purifying of first-class heat exchanger through one-level cold header heat exchanger and one-level heat exchange jar, and the first-class heat exchanger hot junction is that gas one outlet, gas two export and gas three outlets behind the purifying.
Described first-class heat exchanger, secondary heat exchanger, three grades of heat exchangers and level Four heat exchanger types are around heat exchange of heat pipe, coil exchanger, plate type heat exchanger or finned heat exchanger.
Described small-sized Cryo Refrigerator is GM refrigeration machine, vascular refrigerator, sterlin refrigerator or J-T refrigeration machine.
The beneficial effect of the utility model:
The utility model is incorporated into small-sized Cryo Refrigerator in traditional the gas separation and purification system;, as low-temperature receiver other gas of different condensation temperatures is liquefied respectively and solidifies with the small-sized Cryo Refrigerator first order and second level cold head, the higher gas of condensation temperature is after the liquefaction of refrigeration machine first order cold head; The gas purity that condensation temperature is lower will reach more than 99%; Still exist the foreign gas about 1% not to be liquefied, this just needs the lower low-temperature receiver of temperature (refrigeration machine second level cold head provides) that foreign gas is solidified, and sink temperature is low more; Gas purity is high more, reaches more than 99.999% usually through the gas purity behind the overcuring.So just can use lower one-tenth to realize the separation and the purifying of two or more gases originally.
Description of drawings
Fig. 1 is that the gas that is used for based on the GM refrigeration machine that the utility model obtains high-purity helium and nitrogen separates the Cryo Equipment systematic schematic diagram with purifying.
Fig. 2 be obtain high-purity helium, three kinds of product gas of neon and nitrogen be used for based on the GM refrigeration machine that gas separates and the Cryo Equipment systematic schematic diagram of purifying.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
Embodiment one is used for based on the GM refrigeration machine that gas separates and the Cryo Equipment of purifying for what obtain high-purity helium and nitrogen.
As shown in Figure 1.The Cryo Equipment that is used for gas separation and purifying based on the GM refrigeration machine; Comprise combi inlet port 1, first-class heat exchanger 2, secondary heat exchanger 3, liquid collecting jar 4, three grades of heat exchangers 5, level Four heat exchanger 6, helium outlet 7, nitrogen outlet 8, GM refrigeration machine 9 and vacuum (-tight) housings 10; Said combi inlet port 1 connects first-class heat exchanger 2 hot side inlet, and first-class heat exchanger 2 cold side outlets connect secondary heat exchanger 3 imports, and secondary heat exchanger 3 is coiled on the GM refrigeration machine one-level cold head; Secondary heat exchanger 3 outlets are connected to 4 gas feeds of liquid collecting jar; Liquid collecting jar 4 gas vents are connected to three grades of heat exchanger 5 hot side inlet, and three grades of heat exchanger 5 cold side outlets are connected to 6 imports of level Four heat exchanger, and level Four heat exchanger 6 is coiled on the GM refrigeration machine secondary cold head; 6 outlets of level Four heat exchanger are connected to three grades of heat exchanger 5 cold side inlets; Three grades of heat exchanger 5 hot junctions outlets are connected to first-class heat exchanger 2 cold side inlets, and the outlet of first-class heat exchanger 2 hot junctions is connected to helium outlet 7, and liquid collecting jar 4 liquid outlets are connected to nitrogen outlet 8.The one-level of GM refrigeration machine 9, secondary cold head part, first- class heat exchanger 2,3, three grades of heat exchangers 4 of secondary heat exchanger, level Four heat exchanger 5 all places vacuum (-tight) housing 10 with liquid collecting jar 4.
A kind of gas that is used for based on the GM refrigeration machine of high-purity helium of described acquisition and nitrogen separates the Cryo Equipment with purifying, and its workflow is following:
Unstripped gas (containing helium and nitrogen) at first gets into first-class heat exchanger 2 precoolings after combi inlet port 1 entering system, be pre-chilled to enter into secondary heat exchanger 3 again behind the lower temperature and further cool off, and secondary heat exchanger 3 is coiled on the one-level cold head of GM refrigeration machine 9.
Said unstripped gas is gas-liquid mixtures when leaving secondary heat exchanger 3 outlets; Most nitrogen in the unstripped gas liquefy; Gas-liquid mixture gets into liquid collecting jar 4 laggard promoting the circulation of qi liquid to be separated; Liquid is assembled in liquid collecting jar 4 bottoms, and at this moment, the nitrogen that is not liquefied is on a small quantity still contained in the gas the inside of leaving liquid collecting jar 4.
Said helium and the nitrogen that is not liquefied on a small quantity leave liquid collecting jar 4 and enter into three grades of heat exchangers 5 and cool off once more; A spot of before nitrogen that is not liquefied solidifies in three grades of heat exchangers 5; The helium purity of coming out from three grades of heat exchanger 5 cold junctions has reached more than 99.999%, is high-purity gas.
Said high-purity gas enters into level Four heat exchanger 6; Level Four heat exchanger 6 is coiled on the secondary cold head of GM refrigeration machine 9; The helium temperature that leaves level Four heat exchanger 6 reaches minimum; Helium at first arrives helium outlet 7 through returning to normal temperature after the first-class heat exchanger 2 through three grades of heat exchangers 5 again, the nitrogen of liquefaction control discharging automatically at set intervals in the liquid collecting jar 4.
Embodiment two is used for based on the GM refrigeration machine that gas separates and the Cryo Equipment of purifying for what obtain high-purity helium, three kinds of product gas of neon and nitrogen.
As shown in Figure 2.The Cryo Equipment that is used for gas separation and purifying based on the GM refrigeration machine comprises raw material gas inlet 11, first-class heat exchanger 12, one-level cold header heat exchanger 13; Liquid collecting jar 1, secondary cold header heat exchanger 15, liquid collecting jar 2 16, one-level heat exchange jar 17; Secondary heat exchange jar 18, GM refrigeration machine 1, GM refrigeration machine 2 20; Nitrogen outlet 21, helium outlet 22, neon outlet 23 and vacuum (-tight) housing 24.
The high-purity helium of described acquisition, three kinds of product gas of neon and nitrogen a kind of based on the GM refrigeration machine be used for that gas separates and the Cryo Equipment of purifying, its workflow is following:
Unstripped gas (containing helium, neon and nitrogen) at first gets into from raw material gas inlet 11 and carries out precooling the first-class heat exchanger 12.Unstripped gas after said first-class heat exchanger 12 precoolings gets into further cooling of one-level cold header heat exchanger 13; With the liquefaction of nitrogen in the unstripped gas, unstripped gas changes the gas-liquid mixture that comprises liquid nitrogen, gaseous nitrogen atmosphere, helium and neon in 13 outlets of one-level cold header heat exchanger.
After said gas-liquid mixture flows out one-level cold header heat exchanger 13; Flow into liquid collecting jar 1; In liquid collecting jar 1 with gas and fluid separation applications; Liquid nitrogen after the separation is back to precooling unstripped gas in the first-class heat exchanger 12, and the helium after the separation, neon and the nitrogen that is not liquefied get into one-level heat exchange jar 17 and continues cooling.
The said nitrogen that is not liquefied is cured in one-level heat exchange jar 17, and the gas that flows out one-level heat exchange jar 17 is the mist of helium and neon.
The mist of said helium and neon gets into further cooling of secondary cold header heat exchanger 15; With neon liquefaction wherein, the mist of helium and neon changes the gas-liquid mixture that comprises liquid neon, gaseous state neon and helium in 15 outlets of secondary cold header heat exchanger.
After the gas-liquid mixture of said liquid neon, gaseous state neon and helium flows out secondary cold header heat exchanger 15, flow into liquid collecting jar 2 16, with gas and fluid separation applications, helium after the separation and the neon that is not liquefied get into secondary heat exchange jar 18 in liquid collecting jar 2 16.
The said neon that is not liquefied is cured in secondary heat exchange jar 18; The gas that flows out secondary heat exchange jar 18 is the high-purity helium of low temperature, and the high-purity helium of low temperature is back to first-class heat exchanger 12, precooling normal temperature unstripped gas; Helium to normal temperature, can be obtained the high-purity helium of normal temperature by rewarming.
Liquid neon after the described separation is back to one-level cold header heat exchanger 13; The unstripped gas of precooling after first-class heat exchanger 12 precoolings; Liquid neon aspiration heat deflection becomes gaseous state and by rewarming; Got into one-level heat exchange jar 17 by the neon behind the rewarming and flow into first-class heat exchanger 12 precooling normal temperature unstripped gas in the cooling back once more, the low temperature neon in first-class heat exchanger 12 by rewarming to normal temperature, can obtain the high-purity neon of normal temperature.
Present embodiment one has just been enumerated principle and the method that obtains two kinds of product gas and three kinds of product gas with embodiment two, then need on the basis that obtains three kinds of product gas, improve obtaining like needs acquisition more products gas.
The utility model does not relate to all identical with the prior art prior art that maybe can adopt of part to be realized.
Claims (5)
1. one kind is used for based on small-sized Cryo Refrigerator that gas separates and the Cryo Equipment of purifying; It is characterized in that: comprise first-class heat exchanger (2), secondary heat exchanger (3), level Four heat exchanger (6), at least one small-sized Cryo Refrigerator (9) and at least one liquid collecting jar (4); Described small-sized Cryo Refrigerator (9) comprises first cold head and second cold head; Described secondary heat exchanger (3) is arranged on and forms the one-level cold header heat exchanger on described first cold head; Described level Four heat exchanger (6) is arranged on and forms the secondary cold header heat exchanger on second cold head; Described first-class heat exchanger (2) is provided with behind mist import, mixed gas outlet, the purifying gas vent behind gas feed and the purifying; Described mixed gas outlet is connected to described one-level cold header heat exchanger inlet, and the outlet of one-level cold header heat exchanger connects the inlet of said liquid collecting jar (4), and liquid collecting jar (4) gas vent is connected to the import of secondary cold header heat exchanger; Secondary cold header heat exchanger outlet is connected to gas one import behind first-class heat exchanger (2) the cold junction purifying, and first-class heat exchanger (2) hot junction is gas one outlet behind the purifying.
2. the Cryo Equipment that is used for gas separation and purifying based on small-sized Cryo Refrigerator according to claim 1; It is characterized in that: between described liquid collecting jar gas vent and the import of secondary cold header heat exchanger, also be provided with one or three grades of heat exchangers (5), the outlet of described secondary cold header heat exchanger is also passed through described three grades of heat exchangers (5) and is connected to gas one import behind first-class heat exchanger (2) the cold junction purifying.
3. the Cryo Equipment that is used for gas separation and purifying based on small-sized Cryo Refrigerator according to claim 1; It is characterized in that: also comprise another refrigeration machine; This another refrigeration machine comprises one-level heat exchange jar that is positioned at first cold head and the secondary heat exchange jar that is positioned at second cold head; Gas one import behind the cold junction purifying of one-level cold header heat exchanger entering first-class heat exchanger of the liquid outlet of described liquid collecting jar; The gas vent of described liquid collecting jar is connected to the import of described secondary cold header heat exchanger through described one-level heat exchange jar; The outlet of secondary cold header heat exchanger connects another liquid collecting jar; The gas vent of this another liquid collecting jar is connected to gas two imports behind the cold junction purifying of first-class heat exchanger through described secondary heat exchange jar, the liquid outlet of said another liquid collecting jar gets into gas triple feed inlet behind the cold junction purifying of first-class heat exchanger through one-level cold header heat exchanger and one-level heat exchange jar, and the first-class heat exchanger hot junction is that gas one outlet, gas two export and gas three outlets behind the purifying.
According to claim 1,2 or 3 described based on small-sized Cryo Refrigerator be used for that gas separates and the Cryo Equipments of purifying, it is characterized in that described first-class heat exchanger, secondary heat exchanger, three grades of heat exchangers and level Four heat exchanger types are for around heat exchange of heat pipe, coil exchanger, plate type heat exchanger or finned heat exchanger.
5. the Cryo Equipment that is used for gas separation and purifying based on small-sized Cryo Refrigerator according to claim 4 is characterized in that described small-sized Cryo Refrigerator is GM refrigeration machine, vascular refrigerator, sterlin refrigerator or J-T refrigeration machine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220042433XU CN202470623U (en) | 2012-02-10 | 2012-02-10 | Low temperature device based on small-sized low temperature refrigerating machine for gas separation and purification |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220042433XU CN202470623U (en) | 2012-02-10 | 2012-02-10 | Low temperature device based on small-sized low temperature refrigerating machine for gas separation and purification |
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| CN202470623U true CN202470623U (en) | 2012-10-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564066A (en) * | 2012-02-10 | 2012-07-11 | 南京柯德超低温技术有限公司 | Low-temperature device for separating and purifying gas based on small-sized low-temperature refrigerating machine |
| CN107497243A (en) * | 2017-09-22 | 2017-12-22 | 清华大学 | Gas purification apparatus |
| CN108266966A (en) * | 2018-01-16 | 2018-07-10 | 中科睿凌江苏低温设备有限公司 | The Cryo Equipment for detaching and purifying for gas based on small-sized Cryo Refrigerator |
-
2012
- 2012-02-10 CN CN201220042433XU patent/CN202470623U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564066A (en) * | 2012-02-10 | 2012-07-11 | 南京柯德超低温技术有限公司 | Low-temperature device for separating and purifying gas based on small-sized low-temperature refrigerating machine |
| WO2013117033A1 (en) * | 2012-02-10 | 2013-08-15 | 南京柯德超低温技术有限公司 | Low-temperature device for separating and purifying gas based on small-sized low-temperature refrigerating machine |
| CN102564066B (en) * | 2012-02-10 | 2013-10-16 | 南京柯德超低温技术有限公司 | Low-temperature device for separating and purifying gas based on small-sized low-temperature refrigerating machine |
| US9752824B2 (en) | 2012-02-10 | 2017-09-05 | Csic Pride (Nanjing) Cryogenic Technology Co., Ltd. | Low-temperature device for separating and purifying gas based on small-sized low-temperature refrigerating machine |
| CN107497243A (en) * | 2017-09-22 | 2017-12-22 | 清华大学 | Gas purification apparatus |
| CN107497243B (en) * | 2017-09-22 | 2020-09-22 | 清华大学 | Gas purification device |
| CN108266966A (en) * | 2018-01-16 | 2018-07-10 | 中科睿凌江苏低温设备有限公司 | The Cryo Equipment for detaching and purifying for gas based on small-sized Cryo Refrigerator |
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Owner name: CSIC PRIDE (NANJING) CRYOGENIC TECHNOLOGY CO., LTD Free format text: FORMER OWNER: NANJING KEDE SUPER LOW TEMPERATURE TECHNOLOGY CO., LTD. Effective date: 20140922 |
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Free format text: CORRECT: ADDRESS; FROM: 211113 NANJING, JIANGSU PROVINCE TO: 211106 NANJING, JIANGSU PROVINCE |
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Effective date of registration: 20140922 Address after: 211106 No. 32 Changqing street, Jiangning economic and Technological Development Zone, Nanjing, Jiangsu Patentee after: China Shipbuilding Heavy Industries (Nanjing) super low temperature Technology Co., Ltd. Address before: Yan Hu Lu Lukou Town Jiangning District Nanjing 211113 Jiangsu province No. 37 Patentee before: Nanjing Cooltech Gryogenic Technology Co., Ltd. |
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