CN219682125U - Isobaric nondestructive regeneration control structure of nitrogen purification system - Google Patents
Isobaric nondestructive regeneration control structure of nitrogen purification system Download PDFInfo
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- CN219682125U CN219682125U CN202321302511.XU CN202321302511U CN219682125U CN 219682125 U CN219682125 U CN 219682125U CN 202321302511 U CN202321302511 U CN 202321302511U CN 219682125 U CN219682125 U CN 219682125U
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 43
- 230000008929 regeneration Effects 0.000 title claims abstract description 38
- 238000011069 regeneration method Methods 0.000 title claims abstract description 38
- 238000000746 purification Methods 0.000 title claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000001301 oxygen Substances 0.000 claims abstract description 12
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 12
- 150000002829 nitrogen Chemical class 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000000741 silica gel Substances 0.000 claims description 8
- 229910002027 silica gel Inorganic materials 0.000 claims description 8
- 239000002808 molecular sieve Substances 0.000 claims description 6
- 239000011148 porous material Substances 0.000 claims description 6
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims 2
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 14
- 239000007789 gas Substances 0.000 description 7
- 230000006837 decompression Effects 0.000 description 5
- 238000005097 cold rolling Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 239000010457 zeolite Substances 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000012629 purifying agent Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Landscapes
- Drying Of Gases (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The utility model relates to the field of refined nitrogen, in particular to an isobaric lossless regeneration control structure of a nitrogen purification system, wherein a nitrogen source is respectively connected with one end of a valve KV105B, one end of a valve KV106B, one end of a valve V50, an A port of a pipeline where the valve KV101A and the valve KV101B are positioned through a valve V40, the other end of the valve V50 is connected with a pre-drying tower, an outlet of the pre-drying tower is respectively connected with one end of the valve KV106A and one end of the valve KV105A, an F port is arranged between the valve KV106A and the valve KV106B, an E port is arranged between the valve KV105A and the valve KV105B, the D port is communicated with a product pipeline through a valve V60, and the C port is communicated with the F port; the port B is communicated with the port E through a pipeline. The utility model has the advantages that: solves the problems of adsorption and regeneration pressure in regenerated nitrogen and can reach the quality indexes of dew point below-60 ℃ and trace oxygen below 5PPm in refined nitrogen products.
Description
Technical Field
The utility model relates to the technical field of refined nitrogen, in particular to an isobaric lossless regeneration control structure of a nitrogen purification system.
Background
The oxygen content and dew point index of the high-purity nitrogen gas used as a medium of protective gas in cold-rolling zinc plating production are particularly important, the oxygen content of the air-separation nitrogen gas can reach the index of less than 5PPm at present, and the dew point still can not meet the target requirement of cold rolling below-60 ℃ between-40 ℃ and-55 ℃. The nitrogen purification refining process is to remove trace oxygen in the air-separated nitrogen by hydrodeoxygenation technology, and then deeply dry to remove water, finally obtain high-purity refined nitrogen with oxygen content less than 5PPm and dew point less than-60 ℃ for the use of protective gas in cold rolling galvanization process. The existing filling tower of the nitrogen refining purifying unit adopts a double-tower process, and is shown by referring to FIG. 1, wherein one tower (drying A tower) works and the other tower (drying B tower) regenerates, and the operation is switched once in 24 hours, so that continuous operation is realized. The source nitrogen is sent to an a port in a pipeline between valves KV101A and KV101B through a valve V10, a heater and a deoxidizer, the left side of the valve KV101A is connected with the air inlet of a drying A tower, the right side of the valve KV101B is connected with the air inlet of a drying B tower, and pipelines where valves KV104A and KV104B are positioned are connected in parallel with the pipeline where valves KV101A and KV101B are positioned; the pipeline where the valves KV102A and KV102B are positioned is connected between the air outlet of the drying A tower and the air outlet of the drying B tower, and the pipeline where the valves KV103A and KV103B are positioned is connected with the pipeline where the valves KV102A and KV102B are positioned in parallel; the pipelines where the valves KV104A and KV104B are positioned are provided with a vent B which is connected with a cooler for venting; the pipeline between the valves KV102A and KV102B is provided with a nitrogen outlet which is connected with a valve V30 through a pipeline, and the pipeline between the valves KV103A and KV103B is provided with a nitrogen outlet which is connected with a valve V20 and a valve V30 through a pipeline. The regeneration needs to be reduced to normal pressure, then nitrogen is introduced, the mixture is heated and diffused, nitrogen is introduced, the mixture is cooled and diffused, and finally the pressurizing device is provided with working conditions for re-adsorption.
Therefore, the whole regeneration process is completed by four working procedures of decompression, heating, cooling and pressurizing, the regeneration process is implemented under normal pressure, most of high-purity refined nitrogen is discharged to the air, and huge energy waste is generated.
Disclosure of Invention
The utility model aims to provide an isobaric nondestructive regeneration control structure of a nitrogen purification system, overcomes the defects of the prior art, can reach the quality indexes of dew point below-60 ℃ and trace oxygen below 5PPm in a refined nitrogen product, and simultaneously recovers and recycles regenerated nitrogen to be diffused, thereby realizing the aims of energy conservation and consumption reduction.
In order to achieve the above purpose, the present utility model is realized by the following technical scheme:
the constant-pressure lossless regeneration control structure of the nitrogen purification system comprises a drying A tower, a drying B tower, a cooler, a valve KV101A and a valve KV101B, wherein the valve KV102A and the valve KV102B are respectively connected with one end of a valve KV105B through a pipeline, one end of a valve KV106B is connected with one end of a valve KV101A through a pipeline, one end of a valve KV105A is connected with one end of a valve KV106B through a pipeline, one end of a valve KV101A is connected with one end of a valve KV101B through a pipeline, the other end of the valve V50 is connected with an inlet of a predrying tower through a pipeline, one end of a valve KV105A is connected with one end of the valve KV106A through a pipeline, one end of the valve KV105A is connected with the other end of the predrying tower through a pipeline, a C port is arranged on the connecting pipeline, a port F105A is arranged between the other end of the valve 106A and one end of the valve 106B through a pipeline, a port F105B is arranged between the other end of the valve 106A and one end of the valve KV102B through a pipeline, and a port F is connected with the valve 60 through a pipeline, and a port is connected with the valve F60 through a port; and the port B is communicated with the port E through a pipeline.
Further, the valves KV101-106 are pneumatic program-controlled ball valves.
Further, the cooler is a shell-and-tube cooler or a plate cooler.
Further, the pre-drying tower is a filler drying tower or a flash dryer.
Further, the oxygen content of the nitrogen of the product is less than 5PPm, and the dew point is less than-60 ℃.
Furthermore, the regeneration process is isobaric regeneration without decompression and pressurization.
Further, the valve V50 is an equal-proportion pneumatic adjusting ball valve.
Further, the pre-drying tower is filled with a high-strength molecular sieve or fine pore silica gel added with PEN deoxidizer.
Compared with the prior art, the utility model has the beneficial effects that:
1) The regenerated nitrogen to be diffused is recycled, the process upgrading is realized, the problems of adsorption and regeneration pressure isobaric are solved, the quality indexes of dew point < -60 ℃ and trace oxygen < 5PPm in the refined nitrogen product can be achieved, and the decompression, heating, cooling and pressurizing processes in nitrogen regeneration are completed in an isobaric state;
2) Environmental protection advantage: the isobaric lossless regeneration mode can completely eliminate the noise pollution discharged during the decompression of the high-pressure nitrogen;
3) Energy saving advantage: the isobaric lossless regeneration mode can recover the regenerated gas consumption, and the regenerated gas is deeply dried and reflowed into the main gas path to continue cold rolling production with product gas supply, so that the energy consumption is reduced, and the aims of energy conservation and consumption reduction are fulfilled.
Drawings
FIG. 1 is a schematic block diagram of a prior art process flow;
fig. 2 is a schematic block diagram of a process flow of an embodiment of the utility model.
Description of the embodiments
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown.
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
The components of the embodiments of the present utility model generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model.
Referring to fig. 2, a schematic structural diagram of an embodiment of an isobaric lossless regeneration control structure of a nitrogen purification system of the utility model comprises a drying tower A, a drying tower B, a cooler, a valve KV101A and a valve KV101B, wherein the valve KV102A and the valve KV102B are respectively connected with a port A on a connecting pipeline of the valve KV101A and the valve KV101B, the connecting pipeline of the valve KV104A and the valve KV104B is provided with a port B, the connecting pipeline of the valve KV103A and the valve KV103B is provided with a port C, and the connecting pipeline of the valve KV102A and the valve KV102B is provided with a port D; the port B is communicated with the port E through a pipeline.
In the embodiment, valves KV101-106 are pneumatic program-controlled ball valves, and the marked suffixes A and B only represent the identity distinction of adjacent drying towers, and are irrelevant to the specification and the model of the valves. The cooler is DN400 shell-and-tube cooler. The pre-drying tower is DN 1200X 2300 packing drying tower. The oxygen content of the regenerated product nitrogen in the structure is less than 5PPm, and the dew point is less than-60 ℃.
The whole regeneration process is equal-pressure regeneration without decompression and pressurization, which is an essential difference from the regeneration process of the nitrogen purification system in the prior art. The valve V50 is an equal-proportion pneumatic adjusting ball valve and is used for accurately adjusting the inlet air of the nitrogen source so as to stabilize the pressure in the regeneration process.
The predrying tower is filled with high-strength molecular sieve or fine pore silica gel added with PEN deoxidizer. The PEN deoxidizer is used for adsorbing oxygen in nitrogen. The high strength molecular sieve is preferably a 4A zeolite which has a higher selective adsorption capacity for water than other zeolites. The fine pore silica gel (A-type silica gel-TS 6) is suitable for drying, dampproof and rust-proof, etc., can prevent instruments, meters, ammunition, electrical equipment, medicines, foods, textiles and other various packaged articles from being affected with damp, and can also be used for dehydration refinement of catalyst carriers and organic compounds. Because of the characteristics of high bulk density and obvious moisture absorption effect under low humidity, the water-absorbing agent can be used as an air purifying agent to control the air humidity. The silica gel has wide application in sea transportation, and the fine silica gel can effectively dehumidify and dampproof during the transportation of goods due to the serious humidity, so that the quality of the goods is ensured. The fine pore silica gel is also commonly used for dehumidifying between two parallel sealing window plates, and can keep the brightness of two layers of glass. During the regeneration transition, if the pressure drops too rapidly, the zeolite particles may shatter and shatter. The higher the regeneration temperature, the safer the regeneration, but at the same time the greater the regeneration energy consumption, the shorter the service life of the molecular sieve may be. Therefore, the regeneration temperature is suitably between 200-350 ℃. Generally, the regeneration temperature should not exceed 600 ℃, otherwise the zeolite may lose activity. The utility model adopts the isobaric control of adsorption and regeneration pressure, and can avoid the breakage failure of the high-strength molecular sieve or the fine pore silica gel. The PEN deoxidizer can adsorb and treat residual trace oxygen, so that the discharged nitrogen product reaches the product quality standard.
In the embodiment of the utility model, 1000Nm3/h of each treatment capacity of a set of cold nitrogen unit is taken as an example, the consumption of regenerated gas in regeneration is 20% of the treatment capacity of a single unit 200Nm3/h double unit 400Nm3/h, the regeneration process is heated and discharged for 12 hours, the cooling and the discharging are carried out for 8 hours, and the annual regenerated nitrogen consumption cost is as follows: 400×20×360×0.33= 95.04 ten thousand yuan. Potential economic benefits: the existing device has 10 units, the treatment capacity is 40000Nm3/h (according to 10 percent), the calculated regeneration consumption is 4000Nm3/h, and the annual cost is 4000×20×360×0.33=950.4 ten thousand yuan.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The constant-pressure lossless regeneration control structure of the nitrogen purification system comprises a drying A tower, a drying B tower, a cooler, a valve KV101A and a valve KV101B, wherein the valve KV102A and the valve KV102B are respectively connected with one end of a valve KV105B through a pipeline, one end of a valve KV106B is connected with one end of a valve KV101A through a pipeline, one end of a valve KV105A is connected with one end of a valve KV106B through a pipeline, one end of a valve KV101A is connected with one end of a valve KV101B through a pipeline, the other end of the valve V50 is connected with an inlet of a predrying tower through a pipeline, one end of a valve KV105A is connected with one end of the valve KV106A through a pipeline, one end of the valve KV105A is connected with the other end of the predrying tower through a pipeline, a C port is arranged on the connecting pipeline, a port F105A is arranged between the other end of the valve 106A and one end of the valve 106B through a pipeline, a port F105B is arranged between the other end of the valve 106A and one end of the valve KV102B through a pipeline, and a port F is connected with the valve 60 through a pipeline, and a port is connected with the valve F60 through a port; and the port B is communicated with the port E through a pipeline.
2. The isobaric nondestructive regeneration control structure of a nitrogen purification system according to claim 1, wherein the valves KV101-106 are pneumatic programmed ball valves.
3. The isobaric lossless regeneration control structure of a nitrogen purification system according to claim 1, wherein said cooler is a shell-and-tube cooler or a plate cooler.
4. The isobaric lossless regeneration control structure of a nitrogen purification system according to claim 1, wherein said pre-drying tower is a packed drying tower or a flash dryer.
5. The isobaric lossless regeneration control structure of a nitrogen purification system according to claim 1, wherein the oxygen content of the product nitrogen is less than 5PPm and the dew point is less than-60 ℃.
6. The isopiestic lossless regeneration control structure for a nitrogen purge system according to claim 1, wherein the valve V50 is an equal-ratio pneumatic adjusting ball valve.
7. The isopiestic lossless regeneration control structure for a nitrogen purge system according to claim 1, wherein the pre-drying tower is filled with a high-strength molecular sieve or fine-pore silica gel to which a PEN deoxidizer is added.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321302511.XU CN219682125U (en) | 2023-05-26 | 2023-05-26 | Isobaric nondestructive regeneration control structure of nitrogen purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321302511.XU CN219682125U (en) | 2023-05-26 | 2023-05-26 | Isobaric nondestructive regeneration control structure of nitrogen purification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219682125U true CN219682125U (en) | 2023-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321302511.XU Active CN219682125U (en) | 2023-05-26 | 2023-05-26 | Isobaric nondestructive regeneration control structure of nitrogen purification system |
Country Status (1)
| Country | Link |
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| CN (1) | CN219682125U (en) |
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2023
- 2023-05-26 CN CN202321302511.XU patent/CN219682125U/en active Active
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