CN204625182U - A kind of device improving molecular sieve purifier regenerability - Google Patents
A kind of device improving molecular sieve purifier regenerability Download PDFInfo
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- CN204625182U CN204625182U CN201520171411.7U CN201520171411U CN204625182U CN 204625182 U CN204625182 U CN 204625182U CN 201520171411 U CN201520171411 U CN 201520171411U CN 204625182 U CN204625182 U CN 204625182U
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- molecular sieve
- liquid nitrogen
- nitrogen
- resurgent gases
- temperature
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- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model discloses a kind of device improving molecular sieve purifier regenerability, described device is included on existing regenerating molecular sieve air pipe increases by a road nitrogen products bypass, described bypass is connected with nitrogen products entrance in turn, liquid nitrogen pipeline flowrate control valve, described nitrogen products bypass duct exit end is connected with existing regenerating molecular sieve air pipe, joint is between regeneration air stream gauge and resurgent gases molecular sieve temperature in meter, also comprise and one section of stainless steel liquid nitrogen vaporizing tube road is arranged between regeneration air stream gauge and resurgent gases molecular sieve temperature in meter, also comprise the pipe outlet a kind of liquid nitrogen atomizing nozzle being arranged at nitrogen products bypass, be connected with above-mentioned stainless steel liquid nitrogen vaporizing tube road, in addition, coordinated signals mechanism is provided with between above-mentioned liquid nitrogen pipeline flowrate control valve and resurgent gases molecular sieve temperature in meter.The arrangement increases regenerability and the adsorptive power of molecular sieve, and extend the work-ing life of adsorbent of molecular sieve.
Description
Technical field
The utility model belongs to cryogenic air separation process oxygen field, relates to the sieve purification system that large air separation plant purifies air.
Background technology
Modern Cryogenic air separation oxygenerating technology, molecular sieve purifier is almost all adopted to purify air, object is to remove water vapour, carbonic acid gas, acetylene and other hydrocarbon polymer contained in air, processing air, by the disposable absorption of molecular sieve and purification, just can reach the processing requirement of air separation.
The principle of work of molecular sieve purifier is: in order to purify processing air incessantly, sieve purification system is provided with two molecular sieve purifiers, and one adsorbs, and another regenerates.Regenerative process divides four steps to carry out, and comprises step-down, heating, cold blowing and boosting.Regenerative process is to remove in adsorption process the impurity such as water vapour, carbonic acid gas, acetylene being adsorbed on molecular sieve surface and reaching capacity, making molecular sieve regain adsorptive power.In the molecular sieve heating later stage, with the minimizing of desorption heat, bed temperature rises, during cold blowing, from top to bottom, temperature raises bed successively, when cold blowing end of processing comes into operation again, the higher temperature in bed bottom takes outlet molecular sieve to air-flow, while molecular sieve adsorption moisture and carbonic acid gas, release a large amount of heat of adsorption, the two superposition, cause outlet molecular sieve temperature significantly to raise, cause the cold damage of air separation facility to strengthen.In addition, because acetylene and other hydrocarbon polymer gather and can set off an explosion in air separation facility, so the quality of molecular sieve adsorption performance directly has influence on the safety of air separation facility.Therefore, optimize each link of regenerative process as much as possible, not only can extend the life-span of molecular sieve adsorber, the more important thing is the adsorptive power that can improve molecular sieve, the content of detrimental impurity in processing air is controlled within the scope of processing requirement, guarantees air separation facility safe operation.At present, molecular sieve to be heated and the resurgent gases of cold blowing is all select the clean and dirty nitrogen of drying, because it is for the regeneration of molecular sieve, be therefore also referred to as " resurgent gases " in this technological process.
Utility model content
Problem to be solved in the utility model is to provide a kind of device improving molecular sieve purifier regenerability, by adding a road nitrogen products bypass on original regenerating molecular sieve air pipe, the nitrogen products of atomization is mixed with the dirty nitrogen of regeneration, reduce the temperature of existing technique " resurgent gases ", the cold blowing gas that formation temperature is lower, thus heat remaining after decreasing mol sieve beds cold blowing, reduce outlet air temperature when molecular sieve comes into operation again, reach and reduce cold damage, improve the object of molecular sieve purifier adsorptive power simultaneously.
A kind of device improving molecular sieve purifier regenerability described in the utility model, comprise prior art regenerating molecular sieve air pipe, described pipeline is connected with regeneration dirty nitrogen inlet, regenerating molecular sieve gas inlet valve, regeneration air stream gauge, resurgent gases molecular sieve temperature in meter, resurgent gases outlet molecular sieve thermometer, molecular sieve purifier, resurgent gases exhaust outlet in turn; Also comprise nitrogen products bypass, described bypass is connected with nitrogen products entrance, liquid nitrogen pipeline flowrate control valve in turn, the pipe outlet of described nitrogen products bypass is connected with regenerating molecular sieve air pipe, and joint is between regeneration air stream gauge and resurgent gases molecular sieve temperature in meter.Because liquid nitrogen temperature is at-196 ° of below C, so newly-increased nitrogen products bypass all adopts stainless steel pipes.
For security consideration, the utility model is also included between described regeneration air stream gauge and resurgent gases molecular sieve temperature in meter and sets up one section of stainless steel pipes, be connected with the pipe outlet of described nitrogen products bypass, to avoid, the pipe outlet joint temperature of original resurgent gases pipeline and liquid nitrogen bypass is too low causes pipeline breaking.
Simultaneously in order to make liquid nitrogen Quick-gasifying and resurgent gases Homogeneous phase mixing, the pipe outlet that the utility model is also included in described nitrogen products bypass arranges a liquid nitrogen atomisation unit, is connected with described stainless steel liquid nitrogen vaporizing tube road;
In addition, in order to control liquid nitrogen usage quantity more accurately, between described liquid nitrogen pipeline flowrate control valve and resurgent gases molecular sieve temperature in meter, be also provided with coordinated signals mechanism, liquid nitrogen pipeline flowrate control valve can be switched on or switched off automatically according to the set(ting)value of resurgent gases molecular sieve temperature in.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation improving the device of molecular sieve purifier regenerability of the utility model;
10. regenerating molecular sieve air pipe; The dirty nitrogen inlet of 11. regeneration; 12. regenerating molecular sieve gas inlet valves; 13. regeneration air stream gauge; 14. resurgent gases molecular sieve temperature in meters; 15. resurgent gases outlet molecular sieve thermometers; 16. resurgent gases exhaust outlets; 20. newly-increased nitrogen products bypasses; 21. nitrogen products entrances; 22. stainless steel liquid nitrogen vaporizing tube roads; 23. liquid nitrogen pipeline flowrate control valves; 24. liquid nitrogen atomisation units; 30. molecular sieve purifiers.
Embodiment
As shown in Figure 1, for 40000m
3the horizontal molecular sieve purifier that/h oxygenerator is supporting, the utility model embodiment provides a kind of device improving molecular sieve purifier regenerability.
Described device comprises existing regenerating molecular sieve air pipe 10, described pipeline 10 is connected with the dirty nitrogen inlet 11 of regeneration in turn, regenerating molecular sieve gas inlet valve 12, regeneration air stream gauge 13, resurgent gases molecular sieve temperature in meter 14, resurgent gases outlet molecular sieve thermometer 15, molecular sieve purifier 30, resurgent gases exhaust outlet 16, in addition, from oxygenerator liquid nitrogen product transport pipe, the stainless steel liquid nitrogen pipes introducing 50 ㎜ accesses between above-mentioned regeneration air stream gauge 13 and resurgent gases molecular sieve temperature in meter 14, form newly-increased nitrogen products bypass 20, described bypass 20 is connected with nitrogen products entrance 21 in turn, liquid nitrogen pipeline flowrate control valve 23.
For security consideration, the present embodiment also set up between described regeneration air stream gauge 13 and resurgent gases molecular sieve temperature in meter 14 a segment length 15m and described resurgent gases pipeline 10 with diameter stainless steel liquid nitrogen vaporizing tube road 22, be connected with the pipe outlet of described nitrogen products bypass 20, cause pipeline breaking to avoid original resurgent gases pipeline 10 with the pipe outlet joint temperature of liquid nitrogen bypass 20 is too low.
Simultaneously in order to make liquid nitrogen Quick-gasifying and resurgent gases Homogeneous phase mixing, the present embodiment arranges a liquid nitrogen spray nozzle as liquid nitrogen atomisation unit 24 at the pipe outlet of described nitrogen products bypass, is connected with described stainless steel liquid nitrogen vaporizing tube road 22; Liquid nitrogen atomisation unit also can adopt other form, reaches the object that liquid nitrogen fully gasifies.
The present embodiment is also provided with coordinated signals mechanism between liquid nitrogen pipeline flowrate control valve 23 and resurgent gases molecular sieve temperature in meter 14.Valve 23 action aperture is controlled by the temperature spot of molecular sieve temperature in meter 14, high limit is set in 25 DEG C, lower bound is set in 10 DEG C, when regenerating molecular sieve cold blowing remains 30 minutes, the temperature spot (when oxygenerator normally runs, this temperature is all more than 25 DEG C) 25 DEG C time of molecular sieve temperature in meter 14, automatic turn-on flow rate control valve 23, mix with dirty nitrogen after low temperature liquid nitrogen vaporization, reduce cold blowing temperature during regenerating molecular sieve; When the temperature spot of molecular sieve temperature in meter 14 drops to 10 DEG C, flowrate control valve 23 cuts out automatically, stops the supply of low temperature liquid nitrogen, only uses the dirty nitrogen of normal temperature to carry out cold blowing.
The present embodiment improves the device of molecular sieve purifier regenerability, pipeline design is simple, compact, investment cost and running cost are all lower, and it is easy to operate, safe and reliable, due to the raising of molecular sieve adsorption and regenerative power, this device also makes the life cycle of adsorbent of molecular sieve be extended simultaneously, and expectation can extend molecular sieve 2-5 in work-ing life.In addition, since this device implements half a year, found by monitoring contrast, product air goes out molecular sieve purifier carbonic acid gas average content and is down to the 0.07ppm after enforcement from the 0.12ppm before enforcement, when after regenerating molecular sieve, the initial stage uses, product air molecule sieve outlet medial temperature is also down to 32.7 DEG C after enforcement from 35.5 DEG C before enforcement, decreases the cold damage that product air enters air separation facility, thus reduces plant energy consumption.
Claims (4)
1. one kind is improved the device of molecular sieve purifier regenerability, comprise: regenerating molecular sieve air pipe (10), described pipeline (10) is connected with the dirty nitrogen inlet of regeneration (11) in turn, regenerating molecular sieve gas inlet valve (12), regeneration air stream gauge (13), resurgent gases molecular sieve temperature in meter (14), resurgent gases outlet molecular sieve thermometer (15), molecular sieve purifier (30), resurgent gases exhaust outlet (16), it is characterized in that: also comprise nitrogen products bypass (20), described bypass (20) is connected with nitrogen products entrance (21) in turn, liquid nitrogen pipeline flowrate control valve (23), described nitrogen products bypass (20) pipe outlet is connected with regenerating molecular sieve air pipe (10), joint is positioned between regeneration air stream gauge (13) and resurgent gases molecular sieve temperature in meter (14).
2. the device of raising molecular sieve purifier regenerability according to claim 1, it is characterized in that: one section of stainless steel liquid nitrogen vaporizing tube road (22) is arranged between regeneration air stream gauge (13) and resurgent gases molecular sieve temperature in meter (14), is connected with the pipe outlet of nitrogen products bypass (20).
3. the device of raising molecular sieve purifier regenerability according to claim 2, is characterized in that: a kind of liquid nitrogen atomisation unit (24) is arranged on the pipe outlet of nitrogen products bypass (20), is connected with stainless steel liquid nitrogen vaporizing tube road (22).
4. the device of the raising molecular sieve purifier regenerability according to claim 1,2 or 3, is characterized in that: be provided with coordinated signals mechanism between liquid nitrogen pipeline flowrate control valve (23) and resurgent gases molecular sieve temperature in meter (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171411.7U CN204625182U (en) | 2015-03-26 | 2015-03-26 | A kind of device improving molecular sieve purifier regenerability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171411.7U CN204625182U (en) | 2015-03-26 | 2015-03-26 | A kind of device improving molecular sieve purifier regenerability |
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| Publication Number | Publication Date |
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| CN204625182U true CN204625182U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520171411.7U Expired - Fee Related CN204625182U (en) | 2015-03-26 | 2015-03-26 | A kind of device improving molecular sieve purifier regenerability |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249401A (en) * | 2018-03-22 | 2018-07-06 | 张俊霞 | A kind of hydrogen purification device for raw coke oven gas and gasification of biomass product |
-
2015
- 2015-03-26 CN CN201520171411.7U patent/CN204625182U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249401A (en) * | 2018-03-22 | 2018-07-06 | 张俊霞 | A kind of hydrogen purification device for raw coke oven gas and gasification of biomass product |
| CN108249401B (en) * | 2018-03-22 | 2023-09-26 | 邵阳学院 | Hydrogen purification device for raw gas and biomass gasification products |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jiang Xiaolin Inventor after: Li Hui Inventor after: Yuan Yuan Inventor after: Liu Jianghuai Inventor after: Shen Bing Inventor after: Cheng Qiansheng Inventor after: Shi Chengjun Inventor after: Chen Tao Inventor before: Li Hui Inventor before: Yuan Yuan Inventor before: Liu Jianghuai Inventor before: Shen Bing Inventor before: Cheng Qiansheng Inventor before: Shi Chengjun Inventor before: Chen Tao |
|
| COR | Change of bibliographic data | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 |
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| CF01 | Termination of patent right due to non-payment of annual fee |