CN220119164U - Air separation device sealing nitrogen self-supply system - Google Patents
Air separation device sealing nitrogen self-supply system Download PDFInfo
- Publication number
- CN220119164U CN220119164U CN202320988558.XU CN202320988558U CN220119164U CN 220119164 U CN220119164 U CN 220119164U CN 202320988558 U CN202320988558 U CN 202320988558U CN 220119164 U CN220119164 U CN 220119164U
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- Prior art keywords
- nitrogen
- air separation
- seal
- separation device
- valve
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 220
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 106
- 238000000926 separation method Methods 0.000 title claims abstract description 55
- 238000007789 sealing Methods 0.000 title claims abstract description 43
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 238000002309 gasification Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The utility model relates to a sealing nitrogen self-supply system of an air separation device, which comprises an air separation device unit, wherein the low-pressure nitrogen output end of the air separation device unit is fixedly connected with a low-pressure nitrogen pipe network through a conveying pipeline, a low-pressure nitrogen boundary valve and a connecting pipe fitting are fixed on the conveying pipeline, the connecting pipe fitting is arranged in front of the low-pressure nitrogen boundary valve, and the low-pressure nitrogen pipe network and the connecting pipe fitting can convey sealing nitrogen to equipment of the air separation device unit, which needs nitrogen sealing.
Description
Technical Field
The utility model relates to the technical field of sealed nitrogen self-supply, in particular to a sealed nitrogen self-supply system of an air separation device.
Background
The air separation device is provided with 6 sets of air separation equipment with the oxygen production capacity of 82000Nm < 3 >/h, adopts a molecular sieve purification and double-pump compression process, mainly provides medium-pressure high-purity oxygen required by production for the gasification device, and simultaneously provides low-pressure nitrogen and medium-pressure nitrogen required by sealing, replacement and purging for the production device.
As shown in FIG. 2, a plurality of air separation unit units are adopted in a common factory, so that the supplied medium-pressure high-purity oxygen, low-pressure nitrogen and medium-pressure nitrogen can be met, but after one air separation unit or a plurality of air separation unit are stopped, the external low-pressure nitrogen supply is reduced, the pressure of a low-pressure nitrogen pipe network is instantaneously reduced, the inside of the device cannot be timely regulated, the pressure of sealing nitrogen is reduced, and therefore the pressure of liquid pump sealing nitrogen, the pressure of booster unit sealing nitrogen, the pressure of liquid oxygen pump sealing nitrogen and the pressure of liquid expander sealing nitrogen of the air separation unit are reduced to cause interlocking stop, so that the air separation unit is completely stopped, the subsequent gasification device is completely stopped, and the normal operation of other production lines is affected.
Disclosure of Invention
Therefore, the utility model provides the sealed nitrogen self-supply system of the air separation device, which is used for solving the problems that after one air separation device unit or a plurality of air separation device units are stopped, the external low-pressure nitrogen supply is reduced, the pressure of a low-pressure nitrogen pipe network is instantaneously reduced, the inside of the device cannot be timely regulated, and the pressure of the sealed nitrogen is reduced, so that the pressure of the sealed nitrogen of a liquid pump, the pressure of the sealed nitrogen of a booster unit, the pressure of the sealed nitrogen of a liquid oxygen pump and the pressure of the sealed nitrogen of a liquid expander of the air separation device units are reduced to cause the interlocking stop, the air separation device is completely stopped, the subsequent gasification device is completely stopped, and the normal operation of other production lines is influenced.
In order to achieve the above purpose, the utility model provides a sealed nitrogen self-supply system of an air separation device, which comprises an air separation device unit, wherein a low-pressure nitrogen output end of the air separation device unit is fixedly connected with a low-pressure nitrogen pipe network through a conveying pipeline, a low-pressure nitrogen boundary region valve and a connecting pipe fitting are fixed on the conveying pipeline, the connecting pipe fitting is arranged in front of the low-pressure nitrogen boundary region valve, and the low-pressure nitrogen pipe network and the connecting pipe fitting can convey sealed nitrogen to equipment of the air separation device unit, which needs nitrogen sealing.
Further, the air separation unit may be provided in plurality.
Further, the low-pressure nitrogen pipe network is connected with a sealing nitrogen pipe fitting, and the sealing nitrogen pipe fitting can convey sealing nitrogen to equipment of the air separation device unit, which needs nitrogen sealing.
Further, the connecting pipe fitting is fixedly connected with the sealing nitrogen pipe fitting.
Further, the connecting pipe fitting and the sealing nitrogen pipe fitting respectively comprise a nitrogen conveying pipe, a one-way valve and a sealing air valve, and the one-way valve and the sealing air valve are sequentially fixed on the nitrogen conveying pipe from the input end to the output end.
Further, the sealing air valve can adopt a manual valve or an electric valve.
Compared with the prior art, the utility model has the beneficial effects that: through increasing the connecting tube spare, sealing nitrogen gas both can be supplied with by low pressure nitrogen pipe network and can be supplied with by the device is inside, has solved low pressure nitrogen pipe network pressure and has caused sealing nitrogen gas pressure low and then the problem of interlocking air separation plant parking, guarantees the normal operating of other production lines.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic diagram of a prior art structure.
In the figure: the air separation device comprises an air separation unit 1, a low-pressure nitrogen boundary area valve 2, a low-pressure nitrogen pipe network 3, a sealing nitrogen pipe fitting 4 and a connecting pipe fitting 5.
Detailed Description
In order that the objects and advantages of the utility model will become more apparent, the utility model will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model.
It should be noted that, in the description of the present utility model, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, the utility model discloses a sealed nitrogen self-supply system of an air separation device, which comprises an air separation device unit 1, wherein a low-pressure nitrogen output end of the air separation device unit 1 is fixedly connected with a low-pressure nitrogen pipe network 3 through a conveying pipeline, a low-pressure nitrogen boundary region valve 2 and a connecting pipe fitting 5 are fixed on the conveying pipeline, the connecting pipe fitting 5 is arranged in front of the low-pressure nitrogen boundary region valve 2, and the low-pressure nitrogen pipe network 3 and the connecting pipe fitting 5 can convey sealed nitrogen to equipment of the air separation device unit 1, which needs nitrogen sealing.
Specifically, through increasing connecting tube spare 5, sealing nitrogen gas both can be supplied with by low pressure nitrogen pipe network 3 and can be supplied with by the device is inside, has solved low pressure nitrogen pipe network 3 pressure and has caused sealing nitrogen gas pressure low then the problem that the interlocking air separation plant parkked, guarantees the normal operating of other production lines.
The air separation unit 1 may be provided in plurality. The low-pressure nitrogen pipe network 3 is connected with a sealing nitrogen pipe fitting 4, and the sealing nitrogen pipe fitting 4 can convey sealing nitrogen to equipment which needs nitrogen sealing of the air separation unit 1. The connecting pipe fitting 5 is fixedly connected with the sealing nitrogen pipe fitting 4. The connecting pipe fitting 5 and the sealing nitrogen pipe fitting 4 respectively comprise a nitrogen conveying pipe, a one-way valve and a sealing air valve, and the one-way valve and the sealing air valve are sequentially fixed on the nitrogen conveying pipe from an input end to an output end. The sealing air valve can adopt a manual valve or an electric valve.
In the actual use process, the air separation device units 1 can meet the requirement of the supplied medium-pressure high-purity oxygen, low-pressure nitrogen and medium-pressure nitrogen, and the low-pressure nitrogen output end of the air separation device units 1 directly conveys the nitrogen into the low-pressure nitrogen pipe network 3, so that the low-pressure nitrogen pipe network 3 can supply the gas production device with sealing, replacement, purging and the like;
when a plurality of air separation unit 1 is in an unintended parking (abnormal parking), the connecting pipe fitting 5 can directly supply the low-pressure nitrogen before the low-pressure nitrogen boundary valve 2 to equipment (a liquid pump, a booster unit, a liquid oxygen pump, a liquid expander and the like) of the air separation unit 1, which needs nitrogen sealing, to seal, so that the problem that the sealing nitrogen pressure is low due to low pressure of the low-pressure nitrogen pipe network 3 and then the air separation unit is in a parking state is solved.
To sum up, in order to avoid the air separation device to stop because of sealing nitrogen pressure is low, increase sealing nitrogen pipeline before every set of air separation device low pressure nitrogen limit zone governing valve, realize sealing nitrogen pressure is controllable, avoid low pressure nitrogen pipe network pressure to cause the air separation device to stop. Only the air separation device runs stably, the stable running of the subsequent devices can be ensured, and the economic benefit is improved.
Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will be within the scope of the present utility model.
The foregoing description is only of the preferred embodiments of the utility model and is not intended to limit the utility model; various modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (6)
1. The utility model provides an air separation device sealed nitrogen gas self-supply system, includes air separation device unit, the low pressure nitrogen gas output of air separation device unit passes through conveying line and low pressure nitrogen pipe network fixed connection, a serial communication port, be fixed with low pressure nitrogen limit area valve and connecting tube spare on the conveying line, and connecting tube spare sets up before low pressure nitrogen limit area valve, low pressure nitrogen pipe network and connecting tube spare can carry sealed nitrogen gas to the air separation device unit need on the equipment of nitrogen gas seal.
2. The air separation plant seal nitrogen self-supply system of claim 1, wherein said air separation plant unit is disposable in plurality.
3. The air separation plant seal nitrogen self-supply system of claim 2, wherein the low pressure nitrogen line network is connected with seal nitrogen line pipes, and the seal nitrogen line pipes can convey seal nitrogen to equipment of the air separation plant unit that needs nitrogen sealing.
4. The air separation plant seal nitrogen self-supply system of claim 3, wherein said connecting tubing is fixedly connected to the seal nitrogen tubing.
5. The air separation plant seal nitrogen self-supply system of claim 4, wherein the connecting pipe fitting and the seal nitrogen pipe fitting respectively comprise a nitrogen delivery pipe, a one-way valve and a seal gas valve, and the nitrogen delivery pipe is sequentially fixed with the one-way valve and the seal gas valve from an input end to an output end.
6. The air separation plant seal nitrogen self-supply system of claim 5, wherein said seal gas valve is a manual valve or an electrically operated valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320988558.XU CN220119164U (en) | 2023-04-27 | 2023-04-27 | Air separation device sealing nitrogen self-supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320988558.XU CN220119164U (en) | 2023-04-27 | 2023-04-27 | Air separation device sealing nitrogen self-supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220119164U true CN220119164U (en) | 2023-12-01 |
Family
ID=88890943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320988558.XU Active CN220119164U (en) | 2023-04-27 | 2023-04-27 | Air separation device sealing nitrogen self-supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220119164U (en) |
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2023
- 2023-04-27 CN CN202320988558.XU patent/CN220119164U/en active Active
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