CN112875658A - Nitrogen purification control process and system - Google Patents
Nitrogen purification control process and system Download PDFInfo
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- CN112875658A CN112875658A CN202110108504.5A CN202110108504A CN112875658A CN 112875658 A CN112875658 A CN 112875658A CN 202110108504 A CN202110108504 A CN 202110108504A CN 112875658 A CN112875658 A CN 112875658A
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 463
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 231
- 238000000034 method Methods 0.000 title claims abstract description 70
- 238000000746 purification Methods 0.000 title claims abstract description 32
- 230000003247 decreasing effect Effects 0.000 claims abstract description 19
- 238000003860 storage Methods 0.000 claims description 8
- 238000003795 desorption Methods 0.000 description 31
- 238000001179 sorption measurement Methods 0.000 description 25
- 239000002808 molecular sieve Substances 0.000 description 23
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 23
- 239000007789 gas Substances 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007430 reference method Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2210/00—Purification or separation of specific gases
- C01B2210/0043—Impurity removed
- C01B2210/0045—Oxygen
Abstract
The embodiment of the invention discloses a nitrogen purification process and a system, wherein the process comprises the following steps: changing control parameters by gradually increasing or decreasing set variables, and recording the current nitrogen purity obtained under each current control parameter; sequentially comparing the current nitrogen purity with a previous nitrogen purity obtained under an adjacent previous control parameter; when the current nitrogen purity is not higher than the previous nitrogen purity, recording the previous control parameter. The control parameters are automatically analyzed in the debugging process, and the better control parameters are updated into the control system, so that the debugging system has higher accuracy and reference compared with manual field debugging, and the error rate in the debugging process is reduced.
Description
Technical Field
The invention relates to the field of nitrogen purification, in particular to a nitrogen purification control process and a nitrogen purification control system.
Background
The traditional nitrogen purification control process adopts a distributed control and single-step timing method to control the opening and closing of equipment valves, thereby realizing the steps of alternately pressurizing, adsorbing, equalizing pressure and desorbing the carbon molecular sieves in two adsorption towers. Because the characteristics of each batch of carbon molecular sieves are different, debugging personnel need to debug according to the characteristics of each batch of carbon molecular sieves in the using process, and therefore the optimal adsorption and desorption capacity of the molecular sieves is achieved. The debugging process needs debugging personnel to adjust the process time of the equipment according to experience, the manpower is consumed, the conditions that the preparation purity and the flow index of the equipment are gradually poor easily occur in the debugging process, and the production and the use are influenced.
Disclosure of Invention
In order to solve the problems, the invention discloses a nitrogen purification control process and a nitrogen purification control system, which can automatically debug and record control parameters, do not need manual control and are not easy to make mistakes.
In order to achieve the purpose, the invention provides the following technical scheme:
in one aspect, the present invention provides a nitrogen purification control process, comprising: changing control parameters by gradually increasing or decreasing set variables, and recording the current nitrogen purity obtained under each current control parameter; sequentially comparing the current nitrogen purity with the previous nitrogen purity obtained under the adjacent previous control parameter; when the current nitrogen purity is not higher than the previous nitrogen purity, the previous control parameter is recorded.
Compared with the prior art, the nitrogen purification control process provided by the invention has the advantages that through the arrangement of the comparison process flow, the control parameters are automatically analyzed in the debugging process, and the more optimal control parameters are updated into the control system, so that the purpose of efficiently extracting nitrogen is achieved. Compared with manual field debugging, the nitrogen purification control process has higher accuracy and reference, and reduces the error rate in the debugging process.
Optionally, when the current nitrogen purity is not higher than the previous nitrogen purity, after recording the previous control parameter, the process includes: when the purity of the previous nitrogen is the original control parameter without increasing or decreasing the control parameter, if the current control parameter is larger than the original control parameter, the set variable is decreased on the basis of the original control parameter to be used as the next control parameter, and the measurement is continued.
Optionally, changing the control parameters by gradually increasing or decreasing the set variable, and recording the current nitrogen purity obtained under each control parameter, including: when the purity of the nitrogen is sequentially improved, continuously changing the control parameters and recording; when the nitrogen purity no longer increases, the control parameters are no longer changed.
Optionally, recording the purity of the nitrogen obtained under each current control parameter includes: and when the current nitrogen purity is higher than the previous nitrogen purity, recording the current control parameter and the corresponding current nitrogen purity, and deleting the previous control parameter and the corresponding previous nitrogen purity.
Optionally, when the current nitrogen purity is not higher than the previous nitrogen purity, after recording the previous control parameter, the method further includes: and taking the mean value of the current control parameter and the previous control parameter as a new control parameter, recording the new nitrogen purity corresponding to the new control parameter, and comparing the new nitrogen purity with the previous nitrogen purity.
In another aspect, the present invention further provides a nitrogen purification control system, including: the debugging module changes the control parameters by gradually increasing or decreasing the set variables and records the current nitrogen purity obtained under each current control parameter; the comparison module compares the current nitrogen purity with the previous nitrogen purity obtained under the adjacent previous control parameter in sequence; and the storage module records the previous control parameter when the current nitrogen purity is not higher than the previous nitrogen purity.
Compared with the prior art, the nitrogen purification control system provided by the invention has the advantages that the comparison module is arranged, the control parameters are automatically analyzed in the debugging process, and the more optimal control parameters are updated into the control system, so that the purpose of efficiently extracting nitrogen is achieved. Compared with manual field debugging, the nitrogen purification control system has higher accuracy and reference, and reduces the error rate in the debugging process.
Optionally, the system further comprises: and the callback module is used for reducing the set variable as a subsequent control parameter on the basis of the original control parameter if the current control parameter is greater than the original control parameter when the purity of the previous nitrogen is the original control parameter without increasing or reducing the control parameter, and continuously measuring.
Optionally, the debugging module includes: the control unit continuously changes and records the control parameters when the purity of the nitrogen is sequentially improved; when the nitrogen purity no longer increased, the control parameters were not changed.
Optionally, the debugging module further includes: and the deleting unit is used for recording the current control parameter and the corresponding current nitrogen purity when the current nitrogen purity is higher than the previous nitrogen purity, and deleting the previous control parameter and the corresponding previous nitrogen purity.
Optionally, the system further comprises: and the calculation module is used for taking the mean value of the current control parameter and the previous control parameter as a new control parameter, recording the new nitrogen purity corresponding to the new control parameter and comparing the new nitrogen purity with the previous nitrogen purity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow diagram of nitrogen production in the prior art;
FIG. 2 is a flow chart of a nitrogen purification control process provided by an embodiment of the present invention;
fig. 3 is a structural diagram of a nitrogen purification control system according to an embodiment of the present invention.
Reference numerals: 100-debugging module 200-comparison module 300-storage module
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, in the prior art, the nitrogen preparation method is usually a double-tower pressure swing adsorption nitrogen preparation method, which specifically comprises: the air forms purified compressed air after passing through an air compressor and an air tank, the compressed air enters an A adsorption tower, a carbon molecular sieve in the A adsorption tower adsorbs oxygen in the compressed air, and most of nitrogen which is not adsorbed enters a nitrogen tank for storage. And blowing the carbon molecular sieve in the adsorption tower B to desorb oxygen and exhaust.
And after about one minute, when the adsorption tower A is close to saturation, controlling the gas in the adsorption tower A to enter the adsorption tower B, and after about 1-2 seconds, ensuring that the pressure of the two towers is equal, wherein the adsorption tower A performs decompression desorption, and the gas in the towers is exhausted through a silencer. Purified compressed air enters an adsorption tower B, a carbon molecular sieve in the adsorption tower B adsorbs oxygen in the compressed air, most of produced nitrogen enters a nitrogen tank, a small part of nitrogen is blown back to clean the adsorption tower A, so that the carbon molecular sieve in the adsorption tower A desorbs the adsorbed oxygen, after about one minute, the pressure of the two towers is equalized, the steps are repeated, and nitrogen with qualified purity is produced in a circulating manner.
The traditional control program adopts a method of step control and single step timing to control the opening and closing of a valve of the equipment, so that the steps of pressurizing, adsorbing, equalizing and desorbing the molecular sieves of the two towers alternately are realized, and debugging personnel debug the molecular sieves of each batch of the equipment in the debugging process of the equipment, so that the optimal adsorption and desorption capacity of the molecular sieves is achieved. After the optimum process time is obtained by fine adjustment through continuously changing the process time, the control time for preparing the optimum flow and purity of the nitrogen by each set of nitrogen preparation equipment is set, but the method can only set the fixed control time in the debugging stage, and non-professional debuggers cannot judge the variation difference of the equipment molecular sieve performance and the adjustment of the corresponding process time such as adsorption, pressurization, desorption and the like according to the equipment state along with the equipment use and the internal molecular sieve performance, so that the purity and flow index of the nitrogen preparation equipment are gradually deteriorated, and the production and use are influenced.
In order to solve the above problem, an embodiment of the present invention provides a nitrogen purification control process, as shown in fig. 2, the process including:
the control parameters comprise pressurizing pressure, pressurizing time, desorption time and pressure-equalizing time.
The magnitude of the pressurizing pressure: under normal conditions, the adsorption effect of the carbon molecular sieve is enhanced by properly increasing the charging pressure, but the increase of the charging pressure requires the power of a gas inlet device to be increased, and the switching pressure difference between charging and desorbing processes of the molecular sieve is increased due to the increase of the charging pressure, so the service life of the molecular sieve is indirectly influenced, and the pressure increase is one of the reference methods under proper conditions.
Pressurizing time: the adjustment of the charging time is one of the core parameters of the nitrogen preparation by pressure swing adsorption. Too short a pressurization time may result in insufficient nitrogen adsorption of the molecular sieve to the air entering the adsorption column. The specific expression is that the time for air to enter the adsorption tower is short and the air flow is small by connecting the air pipeline through the pneumatic control valve, so that the molecular sieve in the adsorption tower cannot reach the optimal adsorption state, and the whole molecular sieve cannot reach the optimal adsorption effect. If the pressurizing time is too long, excessive air can enter the tower, and the purity of the nitrogen in the molecular sieve tower can be reduced because the air in the tower still has the surplus after the molecular sieve is adsorbed. Therefore, adjusting the pressurizing time to a reasonable value is a key index influencing the nitrogen production purity. In this embodiment 40 seconds to 60 seconds.
Desorption time: the method comprises the specific steps of opening an exhaust valve to release oxygen which cannot be adsorbed by the molecular sieve in the air in the tower, discharging mixed gas (waste gas) rich in oxygen out of the tower, keeping high-purity nitrogen in the tower, and opening a product gas exhaust valve to discharge the high-purity nitrogen into a nitrogen storage tank after the nitrogen in the tower is enriched. The length of desorption time directly influences the numerical value of product gas purity: the waste gas discharge time is too long, high-purity product gas can be discharged out of the system, the yield can be reduced, the purity can be influenced, the product gas discharge time is too long, the pressure drop in the tower is too low, the system pressure difference is increased, and the system is disordered due to waste of energy consumption. Too short waste gas discharge time can cause that waste gas can not be completely discharged out of the system, and the purity is influenced; too short discharge time of the product gas can affect the yield, lead the pressure drop not to reach the next ideal desorption preset value and affect the next adsorption and desorption effect, thereby affecting the purity of the product gas. In this embodiment 40 seconds to 60 seconds.
and 103, recording the previous control parameter when the current nitrogen purity is not higher than the previous nitrogen purity.
As a possible embodiment, the control parameters are selected as charging time, equalizing time and desorption time. Firstly, the system is operated according to unchanged charging time, pressure equalizing time and desorption time, and the nitrogen purity in the state is collected. Increasing the pressurizing time, collecting the current nitrogen purity after running a plurality of processes, and comparing the current nitrogen purity with the previous nitrogen purity. And if the modified charging time ensures that the purity is better, continuing to increase the charging time until the purity of the nitrogen is not improved any more, recording the previous charging time and operating the control system according to the charging time. And then, continuously increasing or decreasing the pressure equalizing time and the desorption time according to the method so as to obtain the optimal pressure equalizing time and desorption time. The number of the running processes can be set manually. In this embodiment: the number of processes is set to 5.
As a possible embodiment, the control parameters are selected as charging time, equalizing time and desorption time. Firstly, the system is operated according to unchanged charging time, pressure equalizing time and desorption time, and the nitrogen purity in the state is collected. Reducing the pressurizing time, collecting the current nitrogen purity after running a plurality of processes, and comparing the current nitrogen purity with the previous nitrogen purity. And if the modified charging time ensures that the purity is better, continuing to reduce the charging time until the purity of the nitrogen is not improved any more, recording the previous charging time and operating the control system according to the charging time. And then, gradually increasing or decreasing the pressure equalizing time and the desorption time according to the method to obtain the optimal pressure equalizing time and desorption time. The number of the running processes can be set manually.
It should be noted that the number and the sequence of the control parameters are only provided for explaining the embodiment, and the number and the sequence of the control parameters are not limited by the present invention.
The specific embodiment is as follows:
the current charging time was 45 seconds, and the purity of the collected nitrogen gas was 98.1%. Setting the variable as 1 second, modifying the pressurizing time as 44 seconds, and recording the pressurizing time when the purity of the collected nitrogen is 98.4% after 5 processes are operated; the modified pressurizing time is 43 seconds, the purity of the collected nitrogen after 5 processes are operated is 98.2 percent, and then the nitrogen purification system is operated according to the standard that the pressurizing time is 44 seconds.
And then, adjusting the pressure equalizing time, wherein the current pressure equalizing time is 0.5 second, and the purity of the collected nitrogen is 97.5%. Setting the variable to be 0.5 second, modifying the pressure equalizing time to be 1 second, operating 5 processes to acquire 98.2% of nitrogen, modifying the pressure equalizing time to be 1.5 seconds, operating 5 processes to acquire 98.0% of nitrogen, and operating the nitrogen purification system according to the standard of the pressure equalizing time of 1.5 seconds.
And then, the desorption time is adjusted, the current desorption time is 45 seconds, and the purity of the collected nitrogen is 97.8 percent. Setting the variable as 1 second, modifying the desorption time as 46 seconds, operating 5 processes to acquire 98.1% of nitrogen purity, modifying the desorption time as 47 seconds, operating 5 processes to acquire 98.0% of nitrogen purity, and operating the nitrogen purification system according to the standard of the desorption time of 46 seconds.
As a possible embodiment, when the current nitrogen purity is not higher than the previous nitrogen purity, after recording the previous control parameter, the process comprises: when the purity of the previous nitrogen is the original control parameter without increasing or decreasing the control parameter, if the current control parameter is larger than the original control parameter, the set variable is decreased on the basis of the original control parameter to be used as the next control parameter, and the measurement is continued.
And if the purity of the nitrogen acquired under the control parameter is less than that of the nitrogen acquired under the original control parameter, reducing the set variable on the basis of the original control parameter, and continuing to measure.
As a possible embodiment, changing the control parameters by gradually increasing or decreasing the set variable and recording the current nitrogen purity obtained under each control parameter includes: when the purity of the nitrogen is sequentially improved, continuously changing the control parameters and recording; when the nitrogen purity no longer increases, the control parameters are no longer changed.
After the set variable is increased once, the purity of the nitrogen rises, the set variable can be continuously increased to obtain the changed control parameter, and the control parameter is stopped changing until the purity of the nitrogen does not rise any more.
After the set variable is reduced once, the purity of the nitrogen rises, the set variable can be continuously reduced to obtain the changed control parameter, and the control parameter is stopped changing until the purity of the nitrogen does not rise any more.
As a possible embodiment, recording the nitrogen purity obtained under each current control parameter comprises: and when the current nitrogen purity is higher than the previous nitrogen purity, recording the current control parameter and the corresponding current nitrogen purity, and deleting the previous control parameter and the corresponding previous nitrogen purity.
The control parameters are changed so that the nitrogen purity is continuously increased, and in the process, if the current nitrogen purity is higher than the previous nitrogen purity, the previous control parameters and the nitrogen purity can be deleted to save the storage space.
As a possible embodiment, when the current nitrogen purity is not higher than the previous nitrogen purity, after recording the previous control parameter, the method further comprises: and taking the mean value of the current control parameter and the previous control parameter as a new control parameter, recording the new nitrogen purity corresponding to the new control parameter, and comparing the new nitrogen purity with the previous nitrogen purity.
If the current nitrogen purity is not higher than the previous nitrogen purity in the process of changing the control parameters, taking the mean value of the current control parameters and the previous control parameters as new control parameters, comparing the new nitrogen purity with the previous nitrogen purity, and if the current nitrogen purity is lower than the previous nitrogen purity, taking the mean value of the new control parameters and the current control parameters as the latest control parameters; if the nitrogen purity is higher than the previous nitrogen purity, taking the average value of the new control parameter and the previous control parameter as the latest control parameter. Thus, a plurality of processes are performed, and the number of the processes can be manually set.
In another aspect, the present invention also provides a nitrogen purification control system, as shown in fig. 3, including: the debugging module 100 changes the control parameters by gradually increasing or decreasing the set variables and records the current nitrogen purity obtained under each current control parameter; the comparison module 200 compares the current nitrogen purity with the previous nitrogen purity obtained under the adjacent previous control parameter in sequence; the storage module 300 records the previous control parameter when the current nitrogen purity is not higher than the previous nitrogen purity.
The control parameters can be charging pressure, charging time, carbon molecular sieve desorption time and pressure-equalizing time.
As a possible embodiment, the control parameters are selected as charging time, equalizing time and desorption time. Firstly, the system is operated according to unchanged charging time, pressure equalizing time and desorption time, and the nitrogen purity in the state is collected. Increasing the pressurizing time, collecting the current nitrogen purity after running a plurality of processes, and comparing the current nitrogen purity with the previous nitrogen purity. And if the modified charging time ensures that the purity is better, continuing to increase the charging time until the purity of the nitrogen is not improved any more, recording the previous charging time and operating the control system according to the charging time. And then, continuously increasing or decreasing the pressure equalizing time and the desorption time according to the method so as to obtain the optimal pressure equalizing time and desorption time. The number of the running processes can be set manually.
As a possible embodiment, the control parameters are selected as charging time, equalizing time and desorption time. Firstly, the system is operated according to unchanged charging time, pressure equalizing time and desorption time, and the nitrogen purity in the state is collected. Reducing the pressurizing time, collecting the current nitrogen purity after running a plurality of processes, and comparing the current nitrogen purity with the previous nitrogen purity. And if the modified charging time ensures that the purity is better, continuing to reduce the charging time until the purity of the nitrogen is not improved any more, recording the previous charging time and operating the control system according to the charging time. And then, gradually increasing or decreasing the pressure equalizing time and the desorption time according to the method to obtain the optimal pressure equalizing time and desorption time. The number of the running processes can be set manually.
It should be noted that the number and the sequence of the control parameters are only provided for explaining the embodiment, and the number and the sequence of the control parameters are not limited by the present invention.
As a possible implementation, the system further includes: and the callback module is used for reducing the set variable as a subsequent control parameter on the basis of the original control parameter if the current control parameter is greater than the original control parameter when the purity of the previous nitrogen is the original control parameter without increasing or reducing the control parameter, and continuously measuring.
And if the purity of the nitrogen acquired under the control parameter is less than that of the nitrogen acquired under the original control parameter, reducing the set variable on the basis of the original control parameter, and continuing to measure.
As a possible implementation, the debugging module includes: the control unit continuously changes and records the control parameters when the purity of the nitrogen is sequentially improved; when the nitrogen purity no longer increased, the control parameters were not changed.
After the set variable is increased once, the purity of the nitrogen rises, the set variable can be continuously increased to obtain the changed control parameter, and the control parameter is stopped changing until the purity of the nitrogen does not rise any more.
After the set variable is reduced once, the purity of the nitrogen rises, the set variable can be continuously reduced to obtain the changed control parameter, and the control parameter is stopped changing until the purity of the nitrogen does not rise any more.
As a possible implementation manner, the debugging module further includes: and the deleting unit is used for recording the current control parameter and the corresponding current nitrogen purity when the current nitrogen purity is higher than the previous nitrogen purity, and deleting the previous control parameter and the corresponding previous nitrogen purity.
The control parameters are changed so that the nitrogen purity is continuously increased, and in the process, if the current nitrogen purity is higher than the previous nitrogen purity, the previous control parameters and the nitrogen purity can be deleted to save the storage space.
As a possible implementation, the system further includes: and the calculation module is used for taking the mean value of the current control parameter and the previous control parameter as a new control parameter, recording the new nitrogen purity corresponding to the new control parameter and comparing the new nitrogen purity with the previous nitrogen purity.
If the current nitrogen purity is not higher than the previous nitrogen purity in the process of changing the control parameters, taking the mean value of the current control parameters and the previous control parameters as new control parameters, comparing the new nitrogen purity with the previous nitrogen purity, and if the current nitrogen purity is lower than the previous nitrogen purity, taking the mean value of the new control parameters and the current control parameters as the latest control parameters; if the nitrogen purity is higher than the previous nitrogen purity, taking the average value of the new control parameter and the previous control parameter as the latest control parameter. Thus, a plurality of processes are performed, and the number of the processes can be manually set.
The technical scheme has the following beneficial effects: through setting the comparison process flow, the control parameters are automatically analyzed in the debugging process, and the more optimal control parameters are updated into the control system.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A nitrogen purification control process is characterized by comprising the following steps:
changing control parameters by gradually increasing or decreasing set variables, and recording the current nitrogen purity obtained under each current control parameter;
sequentially comparing the current nitrogen purity with a previous nitrogen purity obtained under an adjacent previous control parameter;
when the current nitrogen purity is not higher than the previous nitrogen purity, recording the previous control parameter.
2. The nitrogen purification control process of claim 1, wherein the recording the previous control parameter when the current nitrogen purity is not higher than the previous nitrogen purity comprises:
and when the purity of the previous nitrogen is the original control parameter without increasing or decreasing the control parameter, if the current control parameter is greater than the original control parameter, reducing the set variable as the next control parameter on the basis of the original control parameter, and continuing to measure.
3. The nitrogen purification control process of claim 1, wherein changing the control parameters by successively increasing or decreasing the set variables and recording the current nitrogen purity obtained under each current control parameter comprises:
when the purity of the nitrogen is sequentially improved, continuously changing the control parameters and recording;
when the nitrogen purity no longer increases, the control parameters are no longer changed.
4. The nitrogen purification control process of claim 1, wherein the recording of the current nitrogen purity obtained under each current control parameter comprises:
and when the current nitrogen purity is higher than the previous nitrogen purity, recording the current control parameter and the corresponding current nitrogen purity, and deleting the previous control parameter and the corresponding previous nitrogen purity.
5. The nitrogen purification control process of claim 1, wherein, when the current nitrogen purity is not higher than a previous nitrogen purity, after recording the previous control parameter, further comprising:
and taking the mean value of the current control parameter and the previous control parameter as a new control parameter, recording the new nitrogen purity corresponding to the new control parameter, and comparing the new nitrogen purity with the previous nitrogen purity.
6. A nitrogen purification control system, comprising:
the debugging module changes the control parameters by gradually increasing or decreasing the set variables and records the current nitrogen purity obtained under each current control parameter;
the comparison module compares the current nitrogen purity with the previous nitrogen purity obtained under the adjacent previous control parameter in sequence;
and the storage module is used for recording the previous control parameter when the current nitrogen purity is not higher than the previous nitrogen purity.
7. The nitrogen purification system of claim 6, further comprising:
and the call-back module is used for reducing the set variable as a next control parameter on the basis of the original control parameter if the current control parameter is greater than the original control parameter when the purity of the previous nitrogen is the original control parameter without increasing or reducing the control parameter, and continuously measuring.
8. The nitrogen purification control system of claim 6, wherein the commissioning module comprises:
the control unit is used for continuously changing the control parameters and recording when the purity of the nitrogen is sequentially improved; when the nitrogen purity no longer increases, the control parameters are no longer changed.
9. The nitrogen purification control system of claim 6, wherein the commissioning module further comprises:
and the deleting unit is used for recording the current control parameter and the corresponding current nitrogen purity and deleting the previous control parameter and the corresponding previous nitrogen purity when the current nitrogen purity is higher than the previous nitrogen purity.
10. The nitrogen purification control system of claim 6, further comprising:
and the calculation module is used for taking the mean value of the current control parameter and the previous control parameter as a new control parameter, recording the new nitrogen purity corresponding to the new control parameter, and comparing the new nitrogen purity with the previous nitrogen purity.
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| CN113603065A (en) * | 2021-08-27 | 2021-11-05 | 广东鑫钻节能科技股份有限公司 | Air compression station for preparing high-purity nitrogen |
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| CN204508811U (en) * | 2014-08-15 | 2015-07-29 | 胜利油田胜利动力机械集团有限公司 | Nitrogen gas purity automatic-adjusting device |
| CN106249651A (en) * | 2016-08-24 | 2016-12-21 | 贵州铜仁和泰茶业有限公司 | A kind of rolling heating stirring machine control system |
| CN110357046A (en) * | 2019-06-14 | 2019-10-22 | 新沂市新维气体有限公司 | A kind of nitrogen circulation purification devices, nitrogen circulation purification system and method |
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| CN113603065A (en) * | 2021-08-27 | 2021-11-05 | 广东鑫钻节能科技股份有限公司 | Air compression station for preparing high-purity nitrogen |
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