CN104163404B - Recoverying and utilizing method and the device of dirty oxide gas is regenerated in nitrogen purification process - Google Patents
Recoverying and utilizing method and the device of dirty oxide gas is regenerated in nitrogen purification process Download PDFInfo
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- CN104163404B CN104163404B CN201410251632.5A CN201410251632A CN104163404B CN 104163404 B CN104163404 B CN 104163404B CN 201410251632 A CN201410251632 A CN 201410251632A CN 104163404 B CN104163404 B CN 104163404B
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- nitrogen
- oxide gas
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- grade fever
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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 the recoverying and utilizing method and the device that regenerate dirty oxide gas in a kind of nitrogen purification process, comprise: an access watercooler on the dirty oxide gas outlet conduit of the regeneration of nitrogen purifier, be furnished with freezing type drier, nitrogen buffer tank and air low-grade fever regeneration dryer after watercooler successively, wherein the gases exit line of nitrogen buffer tank is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer; Open the valve on the dirty oxide gas outlet conduit of regeneration, after making the dirty oxide gas of regeneration enter watercooler cooling, freezing type drier lyophilize, obtain drying nitrogen; Again drying nitrogen is introduced low-grade fever regeneration dryer after nitrogen buffer tank buffering, make the active oxidation aluminum molecular screen in low-grade fever regeneration dryer under the purging and 160 DEG C of high temperature of drying nitrogen, regenerate drying, the dirty oxide gas of the secondary recycling that dry molecular sieves produces is by blow-off valve emptying; The present invention, by recycling regenerating dirty oxide gas in nitrogen purifier, reaches energy-saving and cost-reducing object.
Description
Technical field
The present invention relates to when producing nitrogen and regenerate the recoverying and utilizing method and the device that regenerate dirty oxide gas in the recovery technology, particularly a kind of nitrogen purification process of dirty oxide gas.
Background technology
The technical process of current large-scale gas station high purity essence nitrogen is as follows: the pressure that centrifugal air compressor is produced is that the pressurized air of 0.7MPa sends into C level strainer, part dust, moisture and impurity in removing pressurized air by (1); (2) pressurized air is sent into freezing type drier, further freezing make the water molecules condensation in pressurized air form liquid water carry secretly dirt, oil discharge cooling driers, obtain the dried compressed air that dew points at normal pressure is-20 DEG C; (3) dried compressed air is sent in low-grade fever regeneration dryer, dried compressed air is dewatered again through the drying tower loading active oxidation aluminum molecular screen, obtains the clean dried pressurized air that dew points at normal pressure is-40 DEG C; (4) sent in PSA varying-voltage adsorption nitrogen machine after T level filtration surge tank by clean dried pressurized air, obtaining purity is 99.5%, and dew points at normal pressure is the thick nitrogen of-40 DEG C; (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 DEG C.
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, namely wherein a drying tower utilizes the moisture (work) of active oxidation aluminum molecular screen under normal temperature, high vapor partial pressure in adsorption compression air, resolves (regeneration) after the water suction of the aluminum oxide molecular sieve of another drying tower is saturated under high temperature (160 DEG C), low vapor partial pressure; When molecular sieve carries out parsing regeneration, need the dried compressed air extracting 3 ~ 4% from dry gas outlet conduit to purge active oxidation aluminum molecular screen as resurgent gases, the dried compressed air consumption of every platform low-grade fever regeneration dryer consumption is about 216 ~ 288m
3/ h, by mean consumption 240m per hour
3, often produce 1m
3the comprehensive consumption of dried compressed air is about 0.09 yuan, and calculating in 360 days is run at annual gas station, 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, also there are in automatic nitrogen purification devices two drying towers loading 5A molecular sieve be used alternatingly, namely wherein a drying tower carries out purifying drying (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 the dirty oxide gas of the regeneration that in resolving, every platform automatic nitrogen purification devices produces is about 240m
3/ h, and to resolve the dirty oxide gas produced be all generally direct emptying process, is a kind of very large waste like this to resource.Therefore, in order to utilize in automatic nitrogen purification devices the dirty oxide gas of discarded regeneration better and farthest utilize the processing power of air low-grade fever regeneration dryer, research and develop the recoverying and utilizing method that regenerates dirty oxide gas in a kind of nitrogen purification process and device very necessary.
Summary of the invention
Object of the present invention is exactly be all direct emptying process for the dirty oxide gas of the regeneration that produces in traditional nitrogen purifier, and the problem wasted energy, provides the recoverying and utilizing method and the device that regenerate dirty oxide gas in a kind of nitrogen purification process.
Regenerate the recoverying and utilizing method of dirty oxide gas in nitrogen purification process of the present invention, comprise the steps:
(1) an access watercooler on the dirty oxide gas outlet conduit of the regeneration of nitrogen purifier, freezing type drier, nitrogen buffer tank and air low-grade fever regeneration dryer is furnished with successively by pipeline after watercooler, wherein the gases exit line of nitrogen buffer tank is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer, and above-mentioned each pipeline is all equipped with valve;
(2) open the valve on the dirty oxide gas outlet conduit of regeneration, make temperature be 50 ~ 60 DEG C, pressure is 0.11 ~ 0.15MPa, and dew points at normal pressure is that the dirty oxide gas of regeneration of 10 DEG C enters watercooler cooling, gas temperature is down to 30 ~ 35 DEG C;
(3) valve of fetching boiling water between water cooler and freezing type drier, temperature is made to be 30 ~ 35 DEG C, pressure is 0.11 ~ 0.15MPa, dew points at normal pressure is that the dirty oxide gas of regeneration of 10 DEG C enters freezing type drier and carries out lyophilize, obtaining temperature is 15 ~ 20 DEG C, pressure is 0.11 ~ 0.15MPa, and dew points at normal pressure is the drying nitrogen of-20 DEG C;
(4) drying nitrogen of upper step is introduced in nitrogen buffer tank, gaseous tension is made to be stabilized in 0.11 ~ 0.15MPa, then the valve between nitrogen buffer tank and air low-grade fever regeneration dryer is opened, drying nitrogen is made to enter the resurgent gases pipeline of low-grade fever regeneration dryer, and open the electric heater of low-grade fever regeneration dryer, make the water saturated aluminum oxide molecular sieve of suction under the purging and 160 DEG C of high temperature of drying nitrogen, regenerate drying, the dirty oxide gas of the secondary recycling that dry molecular sieves produces is by blow-off valve emptying.
The device that the recoverying and utilizing method of dirty oxide gas is used is regenerated in nitrogen purification process of the present invention, comprise nitrogen purifier and air low-grade fever regeneration dryer, watercooler is furnished with successively by pipeline between nitrogen purifier and air low-grade fever regeneration dryer, 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 duct of watercooler, the gases exit line of nitrogen buffer tank is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer, above-mentioned each pipeline is all equipped with valve.
Described valve is all adopt manual ball valve, and the valve certainly adopting other types is also feasible.
The present invention by installing watercooler additional outside the dirty oxide gas exhausting pipeline of the regeneration of automatic nitrogen purification devices, freezing type drier, nitrogen buffer tank, make the dirty oxide gas of regeneration through overcooling, obtaining pressure after drying is 0.11 ~ 0.15MPa, dew points at normal pressure is the drying nitrogen of-20 DEG C, drying nitrogen is made to meet requirement to resurgent gases in air low-grade fever regeneration dryer, then through surge tank access low-grade fever regeneration dryer, regeneration is carried out to aluminum oxide molecular sieve dry, to produce smart nitrogen used for follow-up completely for the clean dried pressurized air so not only making low-grade fever regeneration dryer produce, also rational utilization has been carried out to the dirty oxide gas regenerated in nitrogen purifier simultaneously, reach the maximum utility value of resource.Through adjusting, only this technological innovation, gas station separate unit low-grade fever regeneration dryer just can save 18.66 ten thousand yuan of resurgent gases consumption for 1 year, has saved the production cost of enterprise.
Structure of the present invention is simple, and it is convenient, with low cost to implement, and by recycling regenerating dirty oxide gas in nitrogen purifier, 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, 2-regenerate the outlet of dirty oxide gas, 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 the recoverying and utilizing method of dirty oxide gas in nitrogen purification process of the present invention, comprise the steps:
(1) an access watercooler 4 on 2 pipelines 3 is exported at the dirty oxide gas of the regeneration of nitrogen purifier 1, freezing type drier 5, nitrogen buffer tank 6 and air low-grade fever regeneration dryer 7 is furnished with successively by pipeline after watercooler 4, wherein the gases exit line of nitrogen buffer tank 6 is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer 7, and above-mentioned each pipeline is all equipped with valve 8;
(2) open the valve 8 on the dirty oxide gas outlet conduit of regeneration, make temperature be 50 ~ 60 DEG C, pressure is 0.11 ~ 0.15MPa, and dew points at normal pressure is that the dirty oxide gas of regeneration of 10 DEG C enters watercooler 4 and cools, and gas temperature is down to 30 ~ 35 DEG C;
(3) valve 8 of fetching boiling water between water cooler 4 and freezing type drier 5, temperature is made to be 30 ~ 35 DEG C, pressure is 0.11 ~ 0.15MPa, dew points at normal pressure is that the dirty oxide gas of regeneration of 10 DEG C enters freezing type drier and carries out lyophilize, obtaining temperature is 15 ~ 20 DEG C, pressure is 0.11 ~ 0.15MPa, and dew points at normal pressure is the drying nitrogen of-20 DEG C;
(4) drying nitrogen of upper step is introduced in nitrogen buffer tank 6, gaseous tension is made to be stabilized in 0.11 ~ 0.15MPa, then the valve between nitrogen buffer tank and air low-grade fever regeneration dryer is opened, drying nitrogen is made to enter the resurgent gases pipeline of low-grade fever regeneration dryer, and open the electric heater 9 of low-grade fever regeneration dryer, make the water saturated aluminum oxide molecular sieve of suction under the purging and 160 DEG C of high temperature of drying nitrogen, regenerate drying, the dirty oxide gas of the secondary recycling that dry molecular sieves produces is by blow-off valve 10 emptying.
The device that the recoverying and utilizing method of dirty oxide gas is used is regenerated in nitrogen purification process of the present invention, comprise nitrogen purifier 1 and air low-grade fever regeneration dryer 7, watercooler 4 is furnished with successively by pipeline 3 between nitrogen purifier 1 and air low-grade fever regeneration dryer 7, 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 duct of watercooler 4, the gases exit line of nitrogen buffer tank 6 is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer 7, above-mentioned each pipeline 2 is all equipped with valve 8.
Valve described in the present embodiment is all adopt manual ball valve, and the valve certainly adopting other types is also feasible.
Claims (2)
1. regenerate the recoverying and utilizing method of dirty oxide gas in nitrogen purification process, it is characterized in that comprising the steps:
(1) an access watercooler on the dirty oxide gas outlet conduit of the regeneration of nitrogen purifier, freezing type drier, nitrogen buffer tank and air low-grade fever regeneration dryer is furnished with successively by pipeline after watercooler, wherein the gases exit line of nitrogen buffer tank is connected with the resurgent gases inlet duct of air low-grade fever regeneration dryer, and above-mentioned each pipeline is all equipped with valve;
(2) open the valve on the dirty oxide gas outlet conduit of regeneration, make temperature be 50 ~ 60 DEG C, pressure is 0.11 ~ 0.15MPa, and dew points at normal pressure is that the dirty oxide gas of regeneration of 10 DEG C enters watercooler cooling, gas temperature is down to 30 ~ 35 DEG C;
(3) valve of fetching boiling water between water cooler and freezing type drier, temperature is made to be 30 ~ 35 DEG C, pressure is 0.11 ~ 0.15MPa, dew points at normal pressure is that the dirty oxide gas of regeneration of 10 DEG C enters freezing type drier and carries out lyophilize, obtaining temperature is 15 ~ 20 DEG C, pressure is 0.11 ~ 0.15MPa, and dew points at normal pressure is the drying nitrogen of-20 DEG C;
(4) drying nitrogen of upper step is introduced in nitrogen buffer tank, gaseous tension is made to be stabilized in 0.11 ~ 0.15MPa, then the valve between nitrogen buffer tank and air low-grade fever regeneration dryer is opened, drying nitrogen is made to enter the resurgent gases pipeline of low-grade fever regeneration dryer, and open the electric heater of low-grade fever regeneration dryer, make the water saturated aluminum oxide molecular sieve of suction under the purging and 160 DEG C of high temperature of drying nitrogen, regenerate drying, the dirty oxide gas of the secondary recycling that dry molecular sieves produces is by blow-off valve emptying.
2. regenerate the recoverying and utilizing method of dirty oxide gas in nitrogen purification process according to claim 1, it is characterized in that: described valve is all adopt manual ball valve.
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| 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 CN104163404A (en) | 2014-11-26 |
| CN104163404B true CN104163404B (en) | 2016-01-20 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109323122B (en) * | 2018-10-15 | 2021-04-13 | 杭州博大净化设备有限公司 | Efficient nitrogen purification equipment and intermediate collection method thereof |
| 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 |
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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 |
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| CN104163404A (en) | 2014-11-26 |
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Granted publication date: 20160120 Termination date: 20160609 |