CN104163404A - Recycling method and device for regenerated waste nitrogen in nitrogen purification process - Google Patents
Recycling method and device for regenerated waste nitrogen in nitrogen purification process Download PDFInfo
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- CN104163404A CN104163404A CN201410251632.5A CN201410251632A CN104163404A CN 104163404 A CN104163404 A CN 104163404A CN 201410251632 A CN201410251632 A CN 201410251632A CN 104163404 A CN104163404 A CN 104163404A
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- nitrogen
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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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a recycling method and device for a regenerated waste nitrogen gas in a nitrogen gas purification process. The recycling method comprises the steps of assessing a water cooler on a regenerated waste nitrogen gas outlet pipeline of a nitrogen gas purification device; arranging a refrigerated dryer, a nitrogen gas buffer tank and an air micro-heat regeneration dryer in sequence behind the water cooler, wherein a gas outlet pipeline of the nitrogen gas buffer tank is connected to a regenerated gas inlet pipeline of the air micro-heat regeneration dryer; opening a valve on the regenerated waste nitrogen gas outlet pipeline to allow the regenerated waste nitrogen gas entering the water cooler for being cooled; freeze drying in the refrigerated dryer to obtain dry nitrogen gas; then buffering the dry nitrogen gas through the nitrogen gas buffer tank; introducing the nitrogen gas into the micro-heat regeneration dryer to regenerate and dry an activated alumina molecular sieve in the micro-heat regeneration dryer under purging of the dry nitrogen gas and at a high temperature of 160 DEG C; and releasing secondary regenerated waste nitrogen gas produced in a dry sieve through a release valve. By recycling the regenerated waste nitrogen gas in the nitrogen purification device, an object of saving energy and reducing consumption is realized.
Description
Technical field
In the recovery technology, particularly a kind of nitrogen purification process of dirty oxide gas of regenerating while the present invention relates to produce nitrogen, regenerate recoverying and utilizing method and the device of dirty oxide gas.
Background technology
The technical process of current large-scale gas station high purity essence nitrogen is as follows: the pressurized air that the pressure that (1) produces centrifugal air compressor is 0.7MPa is sent into C level strainer, removes part dust, moisture and impurity in pressurized air; (2) pressurized air is sent into freezing type drier, further freezingly make water molecules condensation in pressurized air form that liquid water is carried dirt secretly, oil is discharged cooling driers, obtain the dried compressed air that dew points at normal pressure is-20 ℃; (3) dried compressed air is sent in low-grade fever regeneration dryer, dried compressed air is dewatered again through loading the drying tower of active oxidation aluminum molecular screen, obtain the clean dried pressurized air that dew points at normal pressure is-40 ℃; (4) clean dried pressurized air is sent in PSA varying-voltage adsorption nitrogen machine after T level is filtered surge tank, obtaining purity is 99.5%, and dew points at normal pressure is the thick nitrogen of-40 ℃; (5) thick nitrogen is sent into automatic nitrogen purification devices, make thick nitrogen after deoxidization by adding hydrogen, lyophilize, through the drying tower of filling 5A molecular sieve, obtaining pressure is 0.3～0.5MPa, oxygen level≤2ppm, nitrogen gas purity >=99.999%, the high pure nitrogen of dew points at normal pressure≤-65 ℃.
In the process of above-mentioned high purity essence nitrogen, described air low-grade fever regeneration dryer has two drying towers and is used alternatingly, wherein a drying tower utilizes active oxidation aluminum molecular screen airborne moisture of adsorption compression (work) under normal temperature, high vapor partial pressure, resolves (regeneration) after the water suction of the aluminum oxide molecular sieve of another drying tower is saturated under high temperature (160 ℃), low vapor partial pressure; At molecular sieve, resolve when regeneration, need to from dry gas outlet conduit, extract 3～4% dried compressed air and as resurgent gases, active oxidation aluminum molecular screen be purged, the dried compressed air consumption of every low-grade fever regeneration dryer consumption is about 216～288m
3/ h, by mean consumption 240m per hour
3, every production 1m
3the comprehensive consumption of dried compressed air is about 0.09 yuan, and the operation of annual gas station is calculated for 360 days, and the resurgent gases consumption of annual separate unit low-grade fever regeneration dryer is just up to 18.66 ten thousand yuan.And in the process of above-mentioned high purity essence nitrogen, in automatic nitrogen purification devices, also having two drying towers of loading 5A molecular sieve is used alternatingly, wherein a drying tower carries out purifying dry (work) to thick oxide gas, the product high pure nitrogen of another drying tower consumption 10% carries out parsing-desiccation (regeneration) to 5A molecular sieve, and in resolving, the dirty oxide gas of the regeneration of every automatic nitrogen purification devices generation is about 240m
3/ h, is generally that direct emptying is processed and resolve the dirty oxide gas producing, and is a kind of very large waste like this to resource.Therefore, in order to utilize better the dirty oxide gas of regeneration discarded in automatic nitrogen purification devices and farthest to utilize the processing power of air low-grade fever regeneration dryer, recoverying and utilizing method and the device of researching and developing the dirty oxide gas of regenerating in a kind of nitrogen purification process are very necessary.
Summary of the invention
Object of the present invention is exactly to be all that direct emptying is processed for the dirty oxide gas of the regeneration that produces in traditional nitrogen purifier, and the problem wasting energy provides recoverying and utilizing method and the device of the dirty oxide gas of regenerating in a kind of nitrogen purification process.
Regenerate in the nitrogen purification process of the present invention recoverying and utilizing method of dirty oxide gas, comprises the steps:
(1) on the dirty oxide gas outlet conduit of regeneration of nitrogen purifier, access a watercooler, after watercooler, by pipeline, be furnished with successively freezing type drier, nitrogen buffer tank and air low-grade fever regeneration dryer, wherein the pneumatic outlet pipeline of nitrogen buffer tank is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer, on above-mentioned each pipeline, valve is all housed;
(2) open the valve of regeneration on dirty oxide gas outlet conduit, making temperature is 50～60 ℃, and pressure is 0.11～0.15MPa, and it is cooling that dew points at normal pressure is that the dirty oxide gas of the regeneration of 10 ℃ enters watercooler, and gas temperature is down to 30～35 ℃;
(3) valve of fetching boiling water between water cooler and freezing type drier, making temperature is 30～35 ℃, pressure is 0.11～0.15MPa, dew points at normal pressure is that the dirty oxide gas of the regeneration of 10 ℃ enters freezing type drier and carries out lyophilize, obtaining temperature is 15～20 ℃, pressure is 0.11～0.15MPa, and dew points at normal pressure is the drying nitrogen of-20 ℃;
(4) drying nitrogen of upper step is introduced in nitrogen buffer tank, make gaseous tension be stabilized in 0.11～0.15MPa, then open the valve between nitrogen buffer tank and air low-grade fever regeneration dryer, make drying nitrogen enter the resurgent gases pipeline of low-grade fever regeneration dryer, and open the electric heater of low-grade fever regeneration dryer, make to inhale the regeneration under the purging of drying nitrogen and 160 ℃ of high temperature of water saturated aluminum oxide molecular sieve dry, the dirty oxide gas of secondary recycling that dry molecular sieves produces is by blow-off valve emptying.
Regenerate in the nitrogen purification process of the present invention recoverying and utilizing method device used of dirty oxide gas, comprise nitrogen purifier and air low-grade fever regeneration dryer, between nitrogen purifier and air low-grade fever regeneration dryer, by pipeline, be furnished with successively watercooler, freezing type drier and nitrogen buffer tank, wherein the dirty oxide gas outlet conduit of the regeneration of nitrogen purifier is connected with the gas inlet pipeline of watercooler, the pneumatic outlet pipeline of nitrogen buffer tank is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer, on above-mentioned each pipeline, valve is all housed.
Described valve is all to adopt manual ball valve, and the valve that certainly adopts other types is also feasible.
The present invention is installed watercooler outward additional by the dirty oxide gas exhausting pipeline of the regeneration at automatic nitrogen purification devices, freezing type drier, nitrogen buffer tank, make to regenerate dirty oxide gas through overcooling, after dry, obtaining pressure is 0.11～0.15MPa, dew points at normal pressure is the drying nitrogen of-20 ℃, make drying nitrogen meet the requirement to resurgent gases in air low-grade fever regeneration dryer, then through surge tank access low-grade fever regeneration dryer, aluminum oxide molecular sieve is regenerated dry, to produce smart nitrogen used for follow-up completely so not only to make clean dried pressurized air that low-grade fever regeneration dryer produces, also the dirty oxide gas of regenerating in nitrogen purifier has been carried out to rational utilization simultaneously, reached the maximum utility value of resource.Through adjusting, only this technological innovation, gas station separate unit low-grade fever regeneration dryer just can be saved 18.66 ten thousand yuan of resurgent gases consumption for 1 year, has saved the production cost of enterprise.
The present invention is simple in structure, and it is convenient, with low cost to implement, and by the dirty oxide gas of regenerating in nitrogen purifier is recycled, reaches energy-saving and cost-reducing object.
Accompanying drawing explanation
Fig. 1 is device connection diagram of the present invention.
In figure: 1-nitrogen purifier, the 2-dirty oxide gas outlet of regenerating, 3-pipeline, 4-watercooler, 5-freezing type drier, 6-nitrogen buffer tank, 7-low-grade fever regeneration dryer, 8-valve, 9-electric heater, 10-blow-off valve.
Embodiment
Regenerate in the nitrogen purification process of the present invention recoverying and utilizing method of dirty oxide gas, comprises the steps:
(1) at the dirty oxide gas of the regeneration of nitrogen purifier 1, export and on 2 pipelines 3, access a watercooler 4, after watercooler 4, by pipeline, be furnished with successively freezing type drier 5, nitrogen buffer tank 6 and air low-grade fever regeneration dryer 7, wherein the pneumatic outlet pipeline of nitrogen buffer tank 6 is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer 7, on above-mentioned each pipeline, valve 8 is all housed;
(2) open the valve 8 of regeneration on dirty oxide gas outlet conduit, making temperature is 50～60 ℃, and pressure is 0.11～0.15MPa, and it is cooling that dew points at normal pressure is that the dirty oxide gas of the regeneration of 10 ℃ enters watercooler 4, and gas temperature is down to 30～35 ℃;
(3) valve 8 of fetching boiling water between water cooler 4 and freezing type drier 5, making temperature is 30～35 ℃, pressure is 0.11～0.15MPa, dew points at normal pressure is that the dirty oxide gas of the regeneration of 10 ℃ enters freezing type drier and carries out lyophilize, obtaining temperature is 15～20 ℃, pressure is 0.11～0.15MPa, and dew points at normal pressure is the drying nitrogen of-20 ℃;
(4) drying nitrogen of upper step is introduced in nitrogen buffer tank 6, make gaseous tension be stabilized in 0.11～0.15MPa, then open the valve between nitrogen buffer tank and air low-grade fever regeneration dryer, make drying nitrogen enter the resurgent gases pipeline of low-grade fever regeneration dryer, and open the electric heater 9 of low-grade fever regeneration dryer, make to inhale the regeneration under the purging of drying nitrogen and 160 ℃ of high temperature of water saturated aluminum oxide molecular sieve dry, the dirty oxide gas of secondary recycling that dry molecular sieves produces is by blow-off valve 10 emptying.
Regenerate in the nitrogen purification process of the present invention recoverying and utilizing method device used of dirty oxide gas, comprise nitrogen purifier 1 and air low-grade fever regeneration dryer 7, between nitrogen purifier 1 and air low-grade fever regeneration dryer 7, by pipeline 3, be furnished with successively watercooler 4, freezing type drier 5 and nitrogen buffer tank 6, wherein the dirty oxide gas of the regeneration of nitrogen purifier 1 exports 2 pipelines and is connected with the gas inlet pipeline of watercooler 4, the pneumatic outlet pipeline of nitrogen buffer tank 6 is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer 7, on above-mentioned each pipeline 2, valve 8 is all housed.
Valve described in the present embodiment is all to adopt manual ball valve, and the valve that certainly adopts other types is also feasible.
Claims (3)
1. regenerate in the nitrogen purification process recoverying and utilizing method of dirty oxide gas, is characterized in that comprising the steps:
(1) on the dirty oxide gas outlet conduit of regeneration of nitrogen purifier, access a watercooler, after watercooler, by pipeline, be furnished with successively freezing type drier, nitrogen buffer tank and air low-grade fever regeneration dryer, wherein the pneumatic outlet pipeline of nitrogen buffer tank is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer, on above-mentioned each pipeline, valve is all housed;
(2) open the valve of regeneration on dirty oxide gas outlet conduit, making temperature is 50～60 ℃, and pressure is 0.11～0.15MPa, and it is cooling that dew points at normal pressure is that the dirty oxide gas of the regeneration of 10 ℃ enters watercooler, and gas temperature is down to 30～35 ℃;
(3) valve of fetching boiling water between water cooler and freezing type drier, making temperature is 30～35 ℃, pressure is 0.11～0.15MPa, dew points at normal pressure is that the dirty oxide gas of the regeneration of 10 ℃ enters freezing type drier and carries out lyophilize, obtaining temperature is 15～20 ℃, pressure is 0.11～0.15MPa, and dew points at normal pressure is the drying nitrogen of-20 ℃;
(4) drying nitrogen of upper step is introduced in nitrogen buffer tank, make gaseous tension be stabilized in 0.11～0.15MPa, then open the valve between nitrogen buffer tank and air low-grade fever regeneration dryer, make drying nitrogen enter the resurgent gases pipeline of low-grade fever regeneration dryer, and open the electric heater of low-grade fever regeneration dryer, make to inhale the regeneration under the purging of drying nitrogen and 160 ℃ of high temperature of water saturated aluminum oxide molecular sieve dry, the dirty oxide gas of secondary recycling that dry molecular sieves produces is by blow-off valve emptying.
2. regenerate in the nitrogen purification process according to claim 1 recoverying and utilizing method of dirty oxide gas, is characterized in that: described valve is all to adopt manual ball valve.
3. regenerate in the nitrogen purification process as claimed in claim 1 recoverying and utilizing method device used of dirty oxide gas, comprise nitrogen purifier and air low-grade fever regeneration dryer, it is characterized in that: between nitrogen purifier and air low-grade fever regeneration dryer, by pipeline, be furnished with successively watercooler, freezing type drier and nitrogen buffer tank, wherein the dirty oxide gas outlet conduit of the regeneration of nitrogen purifier is connected with the gas inlet pipeline of watercooler, the pneumatic outlet pipeline of nitrogen buffer tank is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer, on above-mentioned each pipeline, valve is all housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410251632.5A CN104163404B (en) | 2014-06-09 | 2014-06-09 | Recoverying and utilizing method and the device of dirty oxide gas is regenerated in nitrogen purification process |
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|---|---|---|---|
| CN201410251632.5A CN104163404B (en) | 2014-06-09 | 2014-06-09 | Recoverying and utilizing method and the device of dirty oxide gas is regenerated in nitrogen purification process |
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| CN104163404A true CN104163404A (en) | 2014-11-26 |
| CN104163404B CN104163404B (en) | 2016-01-20 |
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| CN201410251632.5A Expired - Fee Related CN104163404B (en) | 2014-06-09 | 2014-06-09 | Recoverying and utilizing method and the device of dirty oxide gas is regenerated in nitrogen purification process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108862213A (en) * | 2018-08-22 | 2018-11-23 | 苏州市创优净化科技有限公司 | Nitrogen purification tail gas recycling system |
| CN109323122A (en) * | 2018-10-15 | 2019-02-12 | 杭州博大净化设备有限公司 | A kind of efficient nitrogen purification equipment and its intermediate collection method |
| CN110498727A (en) * | 2018-05-18 | 2019-11-26 | 中国石油化工股份有限公司 | A kind of purification of styrene and activated alumina regeneration method and device |
| CN111545018A (en) * | 2020-05-19 | 2020-08-18 | 武汉定飞科技有限公司 | Device and method for recovering nitrogen tail gas |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101700878A (en) * | 2009-09-09 | 2010-05-05 | 张文波 | Nitrogen purification method |
| CN103058153A (en) * | 2012-12-19 | 2013-04-24 | 山东金宇轮胎有限公司 | Nitrogen preparation recycle system and control method thereof |
| CN203342631U (en) * | 2013-05-28 | 2013-12-18 | 重庆海洲化学品有限公司 | Compressed air tepidity regeneration dryer |
-
2014
- 2014-06-09 CN CN201410251632.5A patent/CN104163404B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101700878A (en) * | 2009-09-09 | 2010-05-05 | 张文波 | Nitrogen purification method |
| CN103058153A (en) * | 2012-12-19 | 2013-04-24 | 山东金宇轮胎有限公司 | Nitrogen preparation recycle system and control method thereof |
| CN203342631U (en) * | 2013-05-28 | 2013-12-18 | 重庆海洲化学品有限公司 | Compressed air tepidity regeneration dryer |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498727A (en) * | 2018-05-18 | 2019-11-26 | 中国石油化工股份有限公司 | A kind of purification of styrene and activated alumina regeneration method and device |
| CN110498727B (en) * | 2018-05-18 | 2023-04-07 | 中国石油化工股份有限公司 | Method and device for refining styrene and regenerating activated alumina |
| CN108862213A (en) * | 2018-08-22 | 2018-11-23 | 苏州市创优净化科技有限公司 | Nitrogen purification tail gas recycling system |
| CN109323122A (en) * | 2018-10-15 | 2019-02-12 | 杭州博大净化设备有限公司 | A kind of efficient nitrogen purification equipment and its intermediate collection method |
| CN111545018A (en) * | 2020-05-19 | 2020-08-18 | 武汉定飞科技有限公司 | Device and method for recovering nitrogen tail gas |
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| CN104163404B (en) | 2016-01-20 |
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Granted publication date: 20160120 Termination date: 20160609 |