CN201729662U - Device producing high-purity nitrogen and high-purity oxygen with pressure - Google Patents
Device producing high-purity nitrogen and high-purity oxygen with pressure Download PDFInfo
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- CN201729662U CN201729662U CN2010202372449U CN201020237244U CN201729662U CN 201729662 U CN201729662 U CN 201729662U CN 2010202372449 U CN2010202372449 U CN 2010202372449U CN 201020237244 U CN201020237244 U CN 201020237244U CN 201729662 U CN201729662 U CN 201729662U
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Abstract
The utility model relates to a device producing high-purity nitrogen and high-purity oxygen with pressure, which comprises a high-pressure rectifying tower, a middle-pressure rectifying tower and an oxygen rectifying tower. The high-pressure rectifying tower is arranged on the lower portion of the middle-pressure rectifying tower, the bottom of the high-pressure rectifying tower is connected with a heat exchanger, a tower kettle of the middle-pressure rectifying tower is provided with a condensation evaporator, the upper portion of the middle-pressure rectifying tower is connected with the upper portion of the oxygen rectifying tower via an oxygen-enriched liquid pipeline, and an oxygen rectifying tower reboiler is arranged on the lower portion of the oxygen rectifying tower. Compared with the prior art, the device can realize simultaneous preparation of pressured nitrogen gas and high-purity oxygen, extraction rate of the pressures nitrogen gas is 65%-72% and pressure of the nitrogen gas is 0.15-0.4MPa, extraction rate of the high-purity oxygen accounts for 10-20% of oxygen content of air, and the device obtains low-cost protective gas pressured nitrogen gas and simultaneously can produce high-purity oxygen products with high additional values in float glass industry and the like using the pressured nitrogen gas.
Description
Technical field
The utility model relates to a kind of gas production process and device, especially relates to a kind of high purity nitrogen of band pressure and device of high purity oxygen produced.
Background technology
Fast development along with electronic industry and chip industry, the high purity oxygen demand is sharply increased, usually the photovoltaic industry also needs high purity oxygen when using high purity nitrogen, divide in the flow process and tradition is empty, the raw material sources of production high purity oxygen are technical grade liquid oxygen or oxygen (more than 99.5%), a tower that removes high boiling component need be set, perhaps not contain the oxygen enrichment cut of high boiling component, and then send into and carry out rectifying in the high purity oxygen rectifying tower from the extraction of argon column middle part.For single tower of only producing high purity nitrogen, the user of double tower, be not with argon column usually, the preparation high purity oxygen is difficulty comparatively.Adopt chemical method to know in the oxygen components such as methane, the oxygen rectifying tower is set then deviate from, investment is big, and catalyzer such as palladium catalyst cost an arm and a leg, and operational path is long.
Float glass, chemical industry needs the high pure nitrogen of a large amount of band pressure, nitrogen pressure requirement＞0.15MPa, direct production high extraction from air separation facility, the high purity nitrogen of band pressure is the demand of energy-saving and emission-reduction, therefore adopt three tower system nitrogen, making oxygen is produced the high purity nitrogen of band pressure simultaneously, high purity oxygen, not only saved facility investment, cut down the consumption of energy, the oxygen-rich liquid (oxygen-rich liquid that does not contain high boiling component) of pressure rectifying tower oxygen enrichment enters the rectifying of oxygen rectifying tower and extracts high purity oxygen in utilizing simultaneously, realize the recycling economy effect, energy consumption reduces greatly, and added value of product improves.
Summary of the invention
The purpose of this utility model be exactly provide in order to overcome the defective that above-mentioned prior art exists a kind of purity higher, realize the high purity nitrogen of the production band pressure that pressure nitrogen gas and high purity oxygen reclaim and the method and the device of high purity oxygen.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of high purity nitrogen of band pressure and device of high purity oxygen produced, it is characterized in that, this device comprises high-pressure rectification tower, middle pressure rectifying tower and oxygen rectifying tower, during being located at, described high-pressure rectification tower presses the bottom of rectifying tower, the bottom of this high-pressure rectification tower is connected with interchanger, press the tower still of rectifying tower that condenser/evaporator is set in described, press the top of rectifying tower to be connected through the top of oxygen-rich liquid pipeline with the oxygen rectifying tower in this, described oxygen rectifying tower bottom is provided with oxygen rectifying tower reboiler.
50～90 of column plates are set, the working pressure 0.6～1.1MPa of this high-pressure rectification tower in the described high-pressure rectification tower.
Press in the rectifying tower in described 45～80 of column plates are set, press the working pressure 0.15～0.5MPa of rectifying tower in this.
40～90 of column plates are set, the working pressure 0.03～0.5MPa of this oxygen rectifying tower in the described oxygen rectifying tower.
Compared with prior art, the utlity model has following advantage:
(1) traditional high purity oxygen mainly is to purify from industrial oxygen (99.5%), generally need 2～3 rectifying tower, remove the high boiling component (methane, krypton, xenon, Nitrous Oxide etc.) in the industrial oxygen respectively, then remove the argon component in the oxygen, the utility model at least one equilibrium stage above the middle pressure rectifying tower still of the high purity nitrogen of producing band pressure extracts and does not contain the oxygen-rich liquid of methane substantially as raw material, high boiling point component concentrations such as wherein contained methane, krypton, xenon are the ppb level, and the extraction yield of nitrogen does not reduce simultaneously;
Reclaim when (2) the utility model can be realized pressure nitrogen gas and high purity oxygen, the extraction rate reached of pressure nitrogen gas is to 65-72%, and nitrogen pressure reaches 0.15-0.4MPa, and oxygen level reaches 10-20% in the extraction yield duty gas of high purity oxygen;
(3) high purity oxygen product gas is various informative, and the gas products of production can be a gas, also can produce liquid product and enter the liquid storage groove storage;
(4) in making, the low pure liquid oxygen of middle pressure rectifier bottoms discharge section (contain 70-95% oxygen approximately, the about 100-500ppm of methane reaches krypton, xenon, Nitrous Oxide etc.) presses the security that the hydrocarbon polymer reduction has improved equipment in the rectifying tower.
Description of drawings
Fig. 1 is a structural representation of the present utility model among the embodiment 1;
Fig. 2 is a structural representation of the present utility model among the embodiment 2;
Fig. 3 is a structural representation of the present utility model among the embodiment 3.
1 is pressurized air behind the purifying among the figure, 2 for entering the liquid air of high-pressure rectification tower, 3 is oxygen-enriched liquid air, 4 is liquid nitrogen, 5 is middle pressure nitrogen, 6 is oxygen-rich liquid, 7 is the low purity oxygen that middle pressure rectifying tower still is extracted out, 8 is liquid nitrogen, 9 liquid nitrogen that provide for the outside, 10 is high purity oxygen, 10a is a high purity oxygen, 10b is a high purity oxygen, 11 is dirty nitrogen, 12 is oxygen rich air, 13 are the oxygen rich air after expanding, 14 for entering the thermal source of oxygen rectifying tower reboiler, 15 is oxygen rectifying tower reboiler phlegma, E1 is the main heat exchanger epimere, E2 is the main heat exchanger hypomere, E3 is a supercooler, K1 is a condenser/evaporator, K2 is an oxygen rectifying tower reboiler, C1 is the high-pressure rectification tower, C2 is middle pressure rectifying tower, C3 is the oxygen rectifying tower, TP is a turbo-expander, V1 is a throttling valve, V2 is a throttling valve, V3 was cold throttling valve, V4 is a throttling valve.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment 1
A kind of high purity nitrogen of producing band pressure, the device of high purity oxygen, its structure as shown in Figure 1, air behind the purifying is compressed, pressurized air behind the purifying cools off in air precooling system, entering sieve purification system removes after carbonic acid gas and the moisture, pressurized air 1 behind the purifying enters in the separation column ice chest at main heat exchanger epimere E1, hypomere E2 heat exchange is cooled to state of saturation, enter among the high-pressure rectification tower C1 through throttling valve V1, the part pressurized air that extracts main heat exchanger hypomere E2 is that the thermal source 14 that enters oxygen rectifying tower reboiler enters oxygen rectifying tower reboiler K2, pressurized air is liquefied as oxygen rectifying tower reboiler phlegma 15, this oxygen rectifying tower reboiler phlegma 15 is a liquid air, enters among the high-pressure rectification tower C1; Air is separated into oxygen-enriched liquid air 3 and liquid nitrogen 4 in high-pressure rectification tower C1, more than the working pressure 0.6MPa of high-pressure rectification tower.
Therefrom press the tower still of rectifying tower C2 to extract oxygen rich air 12 re-heat in interchanger E2 out and enter and be expanded among the turbo-expander TP near the normal atmosphere refrigeration, the cold of supplementary device, the oxygen rich air 13 after the expansion is through main heat exchanger E1, E2 re-heat cooling box.
Press nitrogen 5 and oxygen-rich liquid 6 during liquid air, liquid nitrogen are separated in middle pressure rectifying tower C2, the oxygen-rich liquid that low methane content is set in the tower side of middle pressure rectifying tower C2 is taken out and mouthful is extracted an oxygen-rich liquid 6, enters the oxygen rectifying tower after the throttling valve step-down; In press the rectifying tower top to produce purity greater than 99.99% high pure nitrogen, pressure is 0.15-0.4MPa, through supercooler E3, main heat exchanger E1, the E2 re-heat send the user to use.Therefrom press rectifying tower C2 bottom discharge section to be rich in the low purity oxygen 7 of high boiling point component such as methane.
Oxygen-rich liquid 6 enters into oxygen rectifying tower C3 rectifying, and high purity oxygen 10, high-purity liquid oxygen 10a, high-purity gas oxygen 10b extract out from the tower still, and cat head obtains dirty nitrogen re-heat cooling box.
High-purity liquid nitrogen 9 provides liquid nitrogen by additional outside the device, high-purity liquid nitrogen 8 outside device, high-purity liquid nitrogen 9 and high-purity liquid nitrogen 8 interfaces are not necessarily; When producing a large amount of high-purity liquid oxygen, when the cold that turbo-expander TP produces does not satisfy the cold balancing of device, must in device, make the device cold balancing by additional liquid nitrogen.When producing high-purity gas oxygen, when the cold that turbo-expander TP produces is rich, can produces liquid nitrogen and make the device cold balancing.
A kind of high purity nitrogen of band pressure, the method and device of high purity oxygen produced, its structure as shown in Figure 2, with the difference of embodiment 1 is that to enter the thermal source of oxygen rectifying tower reboiler K2 be that high-pressure rectification tower C1 separates the nitrogen that obtains, nitrogen is liquefied as oxygen rectifying tower reboiler phlegma 15, this phlegma is a liquid nitrogen, as high-pressure rectification tower phegma, the position of oxygen rectifying tower reboiler K2 should overcome the resistance of nitrogen pipeline than the opening for feed position height of liquid nitrogen to liquid nitrogen reflux to high-pressure rectification tower C1 cat head.
A kind of high purity nitrogen of band pressure, device of high purity oxygen produced, its structure as shown in Figure 3, with the difference of embodiment 2 be that the liquid nitrogen 4 of high-pressure rectification tower is divided into two strands before entering throttling valve V3, press the phegma of pressing rectifying tower C2 in the conduct of rectifying tower C2 top in entering after the step-down among the one stock-traders' know-how throttling valve V3, enter oxygen rectifying tower C3 top among another stock-traders' know-how throttling valve V4 after the step-down as oxygen rectifying tower C3 phegma, take out mouthful extraction oxygen-rich liquid 6 through entering after the throttling valve step-down below the oxygen rectifying tower C3 liquid nitrogen opening for feed at middle pressure rectifying tower side oxygen-rich liquid.The extraction yield of the high purity nitrogen of so suitable reduction pressure improves the extraction yield of high purity oxygen.
A kind of high purity nitrogen of band pressure and device of high purity oxygen produced, this device comprises high-pressure rectification tower, middle pressure rectifying tower and oxygen rectifying tower, during being located at, the high-pressure rectification tower presses the bottom of rectifying tower, the bottom of this high-pressure rectification tower is connected with interchanger, the middle tower still of rectifying tower of pressing is provided with condenser/evaporator, should middlely press the top of rectifying tower to be connected through the top of oxygen-rich liquid pipeline with the oxygen rectifying tower, oxygen rectifying tower bottom be provided with oxygen rectifying tower reboiler.Wherein, 50 of column plates are set in the high-pressure rectification tower, working pressure 0.6MPa is provided with 45 of column plates in the middle pressure rectifying tower, and working pressure 0.15MPa is provided with 40 of column plates in the oxygen rectifying tower, the working pressure 0.03MPa of this oxygen rectifying tower.
Utilize this device to produce the high purity nitrogen and the high purity oxygen of band pressure, may further comprise the steps:
(1) air behind the purifying enters the high-pressure rectification tower after interchanger is cooled to liquefaction, is separated into liquid nitrogen and oxygen-enriched liquid air through the high-pressure rectification tower;
(2) press rectifying tower during liquid nitrogen and oxygen-enriched liquid air enter, press nitrogen and oxygen-rich liquid in middle pressure rectifying tower, being separated into, the oxygen-rich liquid that low methane content is set in middle pressure rectifying tower side is taken out mouth, this takes out a mouthful connection oxygen-rich liquid pipeline, in press the rectifier bottoms discharge section to be rich in the low purity oxygen of high boiling point component such as methane, middle pressure nitrogen is therefrom pressed in the cat head of rectifying tower and is extracted out;
(3) oxygen-rich liquid therefrom presses 4 theoretical plate height in rectifying Tata still top to extract out, enter into column plate rectifying below the oxygen rectifying tower top through the oxygen-rich liquid pipeline, this oxygen rectifying tower top replenishes liquid nitrogen as phegma, methane content in the oxygen-rich liquid is 0.01ppm, the bottom of this oxygen rectifying tower is provided with reboiler, reboiler adopts the pressurized air enter before the high-pressure rectification tower or the isolated part liquid nitrogen of high-pressure rectification tower as heat-eliminating medium, and high purity oxygen is extracted out from the tower still of oxygen rectifying tower.
A kind of high purity nitrogen of band pressure and device of high purity oxygen produced, this device comprises high-pressure rectification tower, middle pressure rectifying tower and oxygen rectifying tower, during being located at, the high-pressure rectification tower presses the bottom of rectifying tower, the bottom of this high-pressure rectification tower is connected with interchanger, the middle tower still of rectifying tower of pressing is provided with condenser/evaporator, should middlely press the top of rectifying tower to be connected through the top of oxygen-rich liquid pipeline with the oxygen rectifying tower, oxygen rectifying tower bottom be provided with oxygen rectifying tower reboiler.Wherein, 90 of column plates are set in the high-pressure rectification tower, working pressure 1.1MPa is provided with 80 of column plates in the middle pressure rectifying tower, and working pressure 0.5MPa is provided with 90 of column plates, working pressure 0.5MPa in the oxygen rectifying tower.
Utilize this device to produce the high purity nitrogen and the high purity oxygen of band pressure, may further comprise the steps:
(1) air behind the purifying enters the high-pressure rectification tower after interchanger is cooled to liquefaction, is separated into liquid nitrogen and oxygen-enriched liquid air through the high-pressure rectification tower;
(2) press rectifying tower during liquid nitrogen and oxygen-enriched liquid air enter, press nitrogen and oxygen-rich liquid in middle pressure rectifying tower, being separated into, the oxygen-rich liquid that low methane content is set in middle pressure rectifying tower side is taken out mouth, this takes out a mouthful connection oxygen-rich liquid pipeline, in press the rectifier bottoms discharge section to be rich in the low purity oxygen of high boiling point component such as methane, middle pressure nitrogen is therefrom pressed in the cat head of rectifying tower and is extracted out;
(3) oxygen-rich liquid therefrom presses the 15 blocks of theoretical trays in rectifying Tata still top to extract out, enter into 2 column plate rectifying below the oxygen rectifying tower top through the oxygen-rich liquid pipeline, this oxygen rectifying tower top replenishes liquid nitrogen as phegma rectifying, methane content in the oxygen-rich liquid is that the bottom of this oxygen rectifying tower of 2ppm is provided with reboiler, reboiler adopts the pressurized air enter before the high-pressure rectification tower or the isolated part liquid nitrogen of high-pressure rectification tower as heat-eliminating medium, and high purity oxygen is extracted out from 4 blocks of theoretical trays in tower still top of oxygen rectifying tower.
A kind of high purity nitrogen of band pressure and device of high purity oxygen produced, this device comprises high-pressure rectification tower, middle pressure rectifying tower and oxygen rectifying tower, during being located at, the high-pressure rectification tower presses the bottom of rectifying tower, the bottom of this high-pressure rectification tower is connected with interchanger, the middle tower still of rectifying tower of pressing is provided with condenser/evaporator, should middlely press the top of rectifying tower to be connected through the top of oxygen-rich liquid pipeline with the oxygen rectifying tower, oxygen rectifying tower bottom be provided with oxygen rectifying tower reboiler.Wherein, 60 of column plates are set in the high-pressure rectification tower, working pressure 1.0MPa is provided with 70 of column plates in the middle pressure rectifying tower, and working pressure 0.3MPa is provided with 80 of column plates, working pressure 0.3MPa in the oxygen rectifying tower.
Utilize this device to produce the high purity nitrogen and the high purity oxygen of band pressure, may further comprise the steps:
(1) air behind the purifying enters the high-pressure rectification tower after interchanger is cooled to liquefaction, is separated into liquid nitrogen and oxygen-enriched liquid air through the high-pressure rectification tower;
(2) press rectifying tower during liquid nitrogen and oxygen-enriched liquid air enter, press nitrogen and oxygen-rich liquid in middle pressure rectifying tower, being separated into, the oxygen-rich liquid that low methane content is set in middle pressure rectifying tower side is taken out mouth, this takes out a mouthful connection oxygen-rich liquid pipeline, in press the rectifier bottoms discharge section to be rich in the low purity oxygen of high boiling point component such as methane, middle pressure nitrogen is therefrom pressed in the cat head of rectifying tower and is extracted out;
(3) oxygen-rich liquid therefrom presses the 15 blocks of theoretical trays in rectifying Tata still top to extract out, enter into 2 column plate rectifying below the oxygen rectifying tower top through the oxygen-rich liquid pipeline, this oxygen rectifying tower top replenishes liquid nitrogen as phegma rectifying, methane content in the oxygen-rich liquid is that the bottom of this oxygen rectifying tower of 2ppm is provided with reboiler, reboiler adopts the pressurized air enter before the high-pressure rectification tower or the isolated part liquid nitrogen of high-pressure rectification tower as heat-eliminating medium, and high purity oxygen is extracted out from 15 blocks of theoretical trays in tower still top of oxygen rectifying tower.
Claims (4)
1. produce the high purity nitrogen of band pressure and the device of high purity oxygen for one kind, it is characterized in that, this device comprises high-pressure rectification tower, middle pressure rectifying tower and oxygen rectifying tower, during being located at, described high-pressure rectification tower presses the bottom of rectifying tower, the bottom of this high-pressure rectification tower is connected with interchanger, press the tower still of rectifying tower that condenser/evaporator is set in described, press the top of rectifying tower to be connected through the top of oxygen-rich liquid pipeline with the oxygen rectifying tower in this, described oxygen rectifying tower bottom is provided with oxygen rectifying tower reboiler.
2. a kind of high purity nitrogen of band pressure and device of high purity oxygen produced according to claim 1 is characterized in that, 50～90 of column plates is set, the working pressure 0.6～1.1MPa of this high-pressure rectification tower in the described high-pressure rectification tower.
3. a kind of high purity nitrogen of band pressure and device of high purity oxygen produced according to claim 1 is characterized in that described middle the pressure in the rectifying tower is provided with 45～80 of column plates, presses the working pressure 0.15～0.5MPa of rectifying tower in this.
4. a kind of high purity nitrogen of band pressure and device of high purity oxygen produced according to claim 1 is characterized in that, 40～90 of column plates is set, the working pressure 0.03～0.5MPa of this oxygen rectifying tower in the described oxygen rectifying tower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202372449U CN201729662U (en) | 2010-06-24 | 2010-06-24 | Device producing high-purity nitrogen and high-purity oxygen with pressure |
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| CN2010202372449U CN201729662U (en) | 2010-06-24 | 2010-06-24 | Device producing high-purity nitrogen and high-purity oxygen with pressure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886870A (en) * | 2010-06-24 | 2010-11-17 | 上海启元科技发展有限公司 | Method and device for producing pressure high-purity nitrogen and high-purity oxygen |
| CN102530892A (en) * | 2011-07-21 | 2012-07-04 | 上海启元空分技术发展股份有限公司 | Method for producing high purity nitrogen and under-pressure low purity oxygen |
| CN114715860A (en) * | 2022-04-27 | 2022-07-08 | 宏芯气体(上海)有限公司 | Ultra-high purity nitrogen production device capable of removing impurities |
-
2010
- 2010-06-24 CN CN2010202372449U patent/CN201729662U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886870A (en) * | 2010-06-24 | 2010-11-17 | 上海启元科技发展有限公司 | Method and device for producing pressure high-purity nitrogen and high-purity oxygen |
| CN101886870B (en) * | 2010-06-24 | 2012-11-14 | 上海启元科技发展有限公司 | Method and device for producing pressure high-purity nitrogen and high-purity oxygen |
| CN102530892A (en) * | 2011-07-21 | 2012-07-04 | 上海启元空分技术发展股份有限公司 | Method for producing high purity nitrogen and under-pressure low purity oxygen |
| CN114715860A (en) * | 2022-04-27 | 2022-07-08 | 宏芯气体(上海)有限公司 | Ultra-high purity nitrogen production device capable of removing impurities |
| CN114715860B (en) * | 2022-04-27 | 2023-10-27 | 宏芯气体(上海)有限公司 | Impurity-removing ultra-high purity nitrogen making device |
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Address after: 201203, room 1, building 88, 402 Darwin Road, Zhangjiang hi tech park, Shanghai Co-patentee after: Shanghai Qiyuan Air Separation Technology Development Co., Ltd. Patentee after: Shanghai Qiyuan Science & Technology Development Co., Ltd. Address before: 201203, room 1, building 88, 402 Darwin Road, Zhangjiang hi tech park, Shanghai Co-patentee before: Shanghai Qiyuan Air Separation Technology Development Co., Ltd. Patentee before: Shanghai Qiyuan Science & Technology Development Co., Ltd. |
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Granted publication date: 20110202 Termination date: 20170624 |
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