CN111439731A - Fault self-checking online switching operation system of PSA nitrogen making device - Google Patents
Fault self-checking online switching operation system of PSA nitrogen making device Download PDFInfo
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- CN111439731A CN111439731A CN202010361577.0A CN202010361577A CN111439731A CN 111439731 A CN111439731 A CN 111439731A CN 202010361577 A CN202010361577 A CN 202010361577A CN 111439731 A CN111439731 A CN 111439731A
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- nitrogen
- molecular sieve
- carbon molecular
- air
- valve
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 64
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 37
- 239000002808 molecular sieve Substances 0.000 claims abstract description 37
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 37
- 238000001179 sorption measurement Methods 0.000 claims abstract description 34
- 238000007605 air drying Methods 0.000 claims abstract description 31
- 230000000007 visual effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
- C01B21/0405—Purification or separation processes
- C01B21/0433—Physical processing only
- C01B21/045—Physical processing only by adsorption in solids
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention discloses a fault self-checking online switching operation system of a PSA nitrogen making device, which is characterized in that: the system comprises a first nitrogen making system and a second nitrogen making system which are arranged in parallel, wherein the first nitrogen making system comprises a first air drying system and a first carbon molecular sieve adsorption system which are connected in series, the second nitrogen making system comprises a second air drying system and a second carbon molecular sieve adsorption system which are arranged in series, and the first nitrogen making system and the second nitrogen making system are communicated through a communication pipeline, and the system has the beneficial effects that: simple structure, it is with low costs, intelligent degree promotes by a wide margin, and when the effectual individual system trouble of PSA system nitrogen device of having solved, the feedback is untimely, and the fault point very first time can not accurately be judged, and the air drying system of two sets of PSA system nitrogen and carbon molecular sieve adsorption system can not be for reserve scheduling problem each other for PSA system nitrogen device anti fault ability promotes by a wide margin, and the operation process is safer, stable.
Description
Technical Field
The invention relates to the field of nitrogen making systems, in particular to a fault self-checking online switching operation system of a PSA nitrogen making device.
Background
A common PSA (pressure swing adsorption) nitrogen production apparatus generally comprises a dryer system for air drying and a carbon molecular sieve adsorption system for adsorbing components such as oxygen in air by using a pressure swing adsorption principle to generate high-purity nitrogen. The conventional design at present is a complete PSA nitrogen production device formed by connecting a set of dryer systems and a set of carbon molecular sieve adsorption systems in series, wherein the dryer systems are matched with the total intake air amount inversely calculated according to the final gas production amount. Because the process periods such as pressure swing adsorption of the device are short, the program control valve frequently acts and easily damages the internal part to break down, thereby influencing the normal production of the device, and even possibly causing the continuous large air volume emptying and influencing the stability of the front-end air pipe network.
Under the general condition, the factory chooses one to open one and prepare two sets of PSA nitrogen generator to ensure that the device can continuously supply nitrogen gas, but current PSA nitrogen generator if the trouble appears in that set of operation, then need operating personnel in time to discover and start spare equipment immediately, continuously supply with stable system's nitrogen gas, and do not cause the influence to front end air pipe network, and meanwhile, operating personnel need accomplish the accurate judgement to the fault point. In addition, for two sets of independent PSA devices, if one set of air drying system and the other set of carbon molecular sieve adsorption system simultaneously break down, the two sets of PSA devices cannot normally operate, nitrogen production cannot be recovered in a short time, and the accident is possibly enlarged. Especially, for the device with higher failure rate of the programmable valve used for more than 1 year, higher safety risk exists.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the fault self-detection online switching operation system of the PSA nitrogen making device, which has the advantages of simple structure and convenience in operation, can realize the fault self-detection of the device, realize the remote online switching operation and ensure the stable operation of the nitrogen making system.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a PSA nitrogen plant's trouble self-checking switches operating system on line which characterized in that: the system comprises a first nitrogen making system and a second nitrogen making system which are arranged in parallel, wherein the first nitrogen making system comprises a first air drying system and a first carbon molecular sieve adsorption system which are connected in series, the second nitrogen making system comprises a second air drying system and a second carbon molecular sieve adsorption system which are arranged in series, the first air drying system and the second air drying system respectively comprise a first air storage tank, a first precision filter, a combined dryer and a second precision filter which are connected in sequence, the first carbon molecular sieve adsorption system and the second carbon molecular sieve adsorption system respectively comprise a second air storage tank, a PSA carbon molecular sieve nitrogen making adsorber, a nitrogen buffer tank and a third precision filter which are connected in sequence, an air outlet of the second precision filter is connected with an air inlet of the second air storage tank, and a communication pipeline for communicating the first nitrogen making system and the second nitrogen making system is arranged between the second precision filter and the second air storage tank, the communicating pipeline is provided with a valve, the combined dryer and the PSA carbon molecular sieve nitrogen production adsorber comprise a plurality of program control valves, each program control valve is provided with a valve position feedback device, the valve position feedback devices are connected with a controller, and the controller controls and connects the valves.
Further, the controller also comprises a valve position fault system, the valve position fault system comprises a processor for comparing valve program actions with valve position feedback of a valve position feedback device, and the processor is connected with an audible and visual alarm and a touch display screen.
Furthermore, a first master control valve is arranged at both the air inlet end and the air outlet end of the first air drying system; the air inlet end and the air outlet end of the second air drying system are both provided with a second master control valve; the air inlet end and the air outlet end of the first carbon molecular sieve adsorption system are both provided with a third master control valve; and the air inlet end and the air outlet end of the second carbon molecular sieve adsorption system are respectively provided with a fourth master control valve, and the first master control valve, the second master control valve, the third master control valve and the fourth master control valve are all electric control valves and are all connected to the controller.
The beneficial effects of the invention include: simple structure, it is with low costs, intelligent degree promotes by a wide margin, and when the effectual individual system trouble of PSA system nitrogen device of having solved, the feedback is untimely, and the fault point very first time can not accurately be judged, and the air drying system of two sets of PSA system nitrogen and carbon molecular sieve adsorption system can not be for reserve scheduling problem each other for PSA system nitrogen device anti fault ability promotes by a wide margin, and the operation process is safer, stable.
Drawings
FIG. 1 is a schematic diagram of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of the present invention;
fig. 3 is a schematic diagram of the controller architecture of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments and the accompanying drawings.
The fault self-checking online switching operation system of the PSA nitrogen production device comprises a first nitrogen production system and a second nitrogen production system which are arranged in parallel, wherein the first nitrogen production system comprises a first air drying system and a first carbon molecular sieve adsorption system which are connected in series, and the second nitrogen production system comprises a second air drying system and a second carbon molecular sieve adsorption system which are arranged in series. In the embodiment of the invention, the first air drying system and the second air drying system have the same structure and function and respectively comprise a first air storage tank 1, a first precision filter 2, a combined dryer 3 and a second precision filter 4 which are sequentially connected. The first carbon molecular sieve adsorption system and the second carbon molecular sieve adsorption system are also identical in structure principle and respectively comprise a second air storage tank 5, a PSA carbon molecular sieve nitrogen production adsorber 6, a nitrogen buffer tank 7 and a third precision filter 8 which are sequentially connected. And the air outlet of the second precision filter 4 is connected with the air inlet of the second air storage tank 5, so that the working mode of firstly drying the air and then making the nitrogen is realized. In this embodiment, a communication pipeline 9 for communicating the first nitrogen generation system and the second nitrogen generation system is provided between the second precision filter 4 and the second air storage tank 5, and the communication pipeline 9 is provided with a valve 10. The combined dryer 3 and the PSA carbon molecular sieve nitrogen adsorber in this embodiment are both existing mature devices, and include a plurality of program control valves in the combined dryer 3 and the PSA carbon molecular sieve nitrogen adsorber, for realizing air drying or adsorbing oxygen to produce nitrogen. In the invention, each program control valve is provided with a valve position feedback device, the valve position feedback device is connected with a controller, and the controller is in control connection with the valve 10. Therefore, the first air drying system can be selectively matched with the first carbon molecular sieve adsorption system or the second carbon molecular sieve adsorption system, the second air drying system can also be selectively matched with the first carbon molecular sieve adsorption system or the second carbon molecular sieve adsorption system, when one system fails, the other system can be automatically switched to be matched with the system, and the stable output of the whole nitrogen production system is ensured.
In order to better implement the invention, the controller also comprises a valve position fault system, the valve position fault system comprises a processor for comparing the valve program action with the valve position feedback of the valve position feedback device, and the processor is connected with an audible and visual alarm and a touch display screen. The processor is used for presetting an action instruction of the program control valve according to the working process of air drying and nitrogen making, the valve position feedback device feeds back a current valve position signal, the processor compares the feedback signal with the valve position action instruction in real time and judges whether the conflict exists, if the conflict exists, the program control valve at the position is judged to be in fault, and the further processor displays the position of the wrong program control valve in a touch display screen and reminds an operator to overhaul through an audible and visual alarm. And simultaneously, the processor also opens another standby system, for example, the programmable valve in the first air drying system fails, the processor controls to open the second air drying system, and further opens the valve 10, so that the second air drying system is communicated with the first carbon molecular sieve adsorption system.
In order to better implement the present invention, in the embodiment of the present invention, the air inlet end and the air outlet end of the first air drying system are both provided with a first general control valve a; the air inlet end and the air outlet end of the second air drying system are both provided with a second master control valve b; the air inlet end and the air outlet end of the first carbon molecular sieve adsorption system are both provided with a third master control valve c; and the air inlet end and the air outlet end of the second carbon molecular sieve adsorption system are respectively provided with a fourth master control valve d, and the first master control valve a, the second master control valve b, the third master control valve c and the fourth master control valve d are all electric control valves and are connected to the controller. The working process of the system is that a first nitrogen making system and a second nitrogen making system which are arranged in parallel are changed into a four-way nitrogen making system which can be crossed through a controller. When the system works, the main control valves corresponding to the front and the back of the current system are closed when the system breaks down, and the main control valves corresponding to the front and the back of the system do not work and are also in a closed state, namely only one nitrogen-making system is communicated to work under any condition.
The technical solutions provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by using specific examples, and the descriptions of the embodiments are only used to help understanding the principles of the embodiments of the present invention; meanwhile, for a person skilled in the art, according to the embodiments of the present invention, there may be variations in the specific implementation manners and application ranges, and in summary, the content of the present description should not be construed as a limitation to the present invention.
Claims (3)
1. The utility model provides a PSA nitrogen plant's trouble self-checking switches operating system on line which characterized in that: the device comprises a first nitrogen making system and a second nitrogen making system which are arranged in parallel, wherein the first nitrogen making system comprises a first air drying system and a first carbon molecular sieve adsorption system which are connected in series, the second nitrogen making system comprises a second air drying system and a second carbon molecular sieve adsorption system which are arranged in series, the first air drying system and the second air drying system respectively comprise a first air storage tank (1), a first precision filter (2), a combined dryer (3) and a second precision filter (4) which are connected in series, the first carbon molecular sieve adsorption system and the second carbon molecular sieve adsorption system respectively comprise a second air storage tank (5), a PSA carbon molecular sieve nitrogen making adsorber (6), a nitrogen buffer tank (7) and a third precision filter (8) which are connected in series, an air outlet of the second precision filter (4) is connected with an air inlet of the second air storage tank (5), be provided with between second precision filter (4) and second air storage tank (5) intercommunication pipeline (9) that communicate first nitrogen system and second nitrogen system, this intercommunication pipeline (9) are provided with valve (10), including a plurality of program control valves in combined dryer (3) and the PSA carbon molecular sieve nitrogen adsorption ware, and all be provided with the valve position feedback ware on every program control valve, the valve position feedback ware is connected with the controller, controller control connection valve (10).
2. The system of claim 1, wherein the system comprises: the controller further comprises a valve position fault system, the valve position fault system comprises a processor used for comparing valve program actions with valve position feedback devices to feed back valve positions, and the processor is connected with an audible and visual alarm and a touch display screen.
3. The system of claim 2, wherein the PSA nitrogen plant fault self-test online switching operation system comprises: the air inlet end and the air outlet end of the first air drying system are both provided with a first main control valve (a); the air inlet end and the air outlet end of the second air drying system are both provided with a second master control valve (b); the air inlet end and the air outlet end of the first carbon molecular sieve adsorption system are both provided with a third master control valve (c); and the air inlet end and the air outlet end of the second carbon molecular sieve adsorption system are respectively provided with a fourth master control valve (d), and the first master control valve (a), the second master control valve (b), the third master control valve (c) and the fourth master control valve (d) are all electric control valves and are connected to the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010361577.0A CN111439731A (en) | 2020-04-30 | 2020-04-30 | Fault self-checking online switching operation system of PSA nitrogen making device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010361577.0A CN111439731A (en) | 2020-04-30 | 2020-04-30 | Fault self-checking online switching operation system of PSA nitrogen making device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202337689U (en) * | 2011-11-30 | 2012-07-18 | 江苏南极机械有限责任公司 | Molecular sieve variable-pressure adsorption nitrogen making device |
| CN104083986A (en) * | 2014-07-14 | 2014-10-08 | 杭州天跃气体设备制造有限公司 | Self-adaptive energy-saving type pressure swing adsorption separation system |
| CN208103937U (en) * | 2018-02-01 | 2018-11-16 | 苏州展拓净化科技有限公司 | A kind of food service industry energy-efficient nitrogen generator |
| CN212292808U (en) * | 2020-04-30 | 2021-01-05 | 重庆卡贝乐化工有限责任公司 | Fault self-checking online switching operation system of PSA nitrogen making device |
-
2020
- 2020-04-30 CN CN202010361577.0A patent/CN111439731A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202337689U (en) * | 2011-11-30 | 2012-07-18 | 江苏南极机械有限责任公司 | Molecular sieve variable-pressure adsorption nitrogen making device |
| CN104083986A (en) * | 2014-07-14 | 2014-10-08 | 杭州天跃气体设备制造有限公司 | Self-adaptive energy-saving type pressure swing adsorption separation system |
| CN208103937U (en) * | 2018-02-01 | 2018-11-16 | 苏州展拓净化科技有限公司 | A kind of food service industry energy-efficient nitrogen generator |
| CN212292808U (en) * | 2020-04-30 | 2021-01-05 | 重庆卡贝乐化工有限责任公司 | Fault self-checking online switching operation system of PSA nitrogen making device |
Non-Patent Citations (2)
| Title |
|---|
| 仝喜亮 等: ""大型制氮机系统设计应用"", 《科技信息》, vol. 1, no. 28, pages 361 * |
| 仝喜亮;孟继华;: "大型制氮机系统设计应用", 科技信息, no. 28 * |
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