CN115318062B - Automatic calibration method of oxygenerator - Google Patents
Automatic calibration method of oxygenerator Download PDFInfo
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- CN115318062B CN115318062B CN202211144152.XA CN202211144152A CN115318062B CN 115318062 B CN115318062 B CN 115318062B CN 202211144152 A CN202211144152 A CN 202211144152A CN 115318062 B CN115318062 B CN 115318062B
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- 238000000034 method Methods 0.000 title claims abstract description 56
- 238000001179 sorption measurement Methods 0.000 claims abstract description 68
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000001301 oxygen Substances 0.000 claims abstract description 66
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000002474 experimental method Methods 0.000 claims description 2
- 239000002808 molecular sieve Substances 0.000 abstract description 5
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/047—Pressure swing adsorption
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/02—Preparation of oxygen
- C01B13/0229—Purification or separation processes
- C01B13/0248—Physical processing only
- C01B13/0259—Physical processing only by adsorption on solids
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
- Separation Of Gases By Adsorption (AREA)
Abstract
The invention provides an automatic calibration method of an oxygenerator, and relates to the field of molecular sieve oxygenerators. The automatic calibration method of the oxygenerator comprises the following specific steps: s1, setting adsorption time length X as A seconds, firstly setting pressure equalizing time length J as B seconds, and adjusting reference Rx as C seconds; s2, automatically adjusting the adsorption time length X, and obtaining the optimal adsorption time length Xg in the adjustment reference Rx; s3, setting X as Xg seconds, setting the equalizing time length J as B seconds, and setting the adjusting reference Rj of the equalizing time length J as D seconds; s4, automatically adjusting the pressure equalizing time length J. Compared with the traditional method, the method adopts a manual mode to calibrate X, J time length, the optimal oxygen concentration of the machine is obtained by manually adjusting various X, J parameter combinations, time and labor are consumed, the method can be used for quickly and automatically adjusting X, J time length to achieve the optimal oxygen concentration, and multiple machines can be calibrated simultaneously in production, so that the efficiency is improved.
Description
Technical Field
The invention relates to the field of molecular sieve oxygenerators, in particular to an automatic calibration method of an oxygenerator.
Background
The molecular sieve oxygenerator controls the two oxygenerator towers to respectively carry out the same circulation process by using an electromagnetic valve through a method of pressurized adsorption and exhaust desorption, thereby realizing continuous oxygenerator. The oxygen generation towers are filled with molecular sieves for adsorbing nitrogen, each oxygen generation tower adsorbs nitrogen when air is taken in, and oxygen is output; the nitrogen gas is discharged to the outside atmosphere as exhaust gas at the time of exhaust. The intake and exhaust may be controlled by solenoid valves.
A schematic diagram of the solenoid valve and the oxygen generating tower section of the oxygenerator is shown in FIG. 1. The main control board can:
1. The electromagnetic valve is controlled so as to control whether the oxygen generating tower is communicated with compressed air or external atmosphere. Air is introduced when compressed air is communicated, and exhaust gas is discharged when the air is connected with the outside atmosphere.
2. The actually generated oxygen concentration is obtained by a concentration sensor.
The main control board controls the solenoid valve to circularly operate to continuously adsorb nitrogen and output oxygen, and each cycle period is as follows:
The X adsorption time and the J pressure equalizing time in the table have great influence on the output oxygen concentration. Because of differences in structure, molecular sieve materials, etc., it is not possible to make a single machine of different models, or the same model, each machine requires separate calibration of X and J in order to achieve optimal oxygen concentrations during design and production. The traditional method adopts a manual method to calibrate X, J time length, which is time-consuming and labor-consuming.
Disclosure of Invention
Technical scheme (one)
In order to achieve the above purpose, the invention is realized by the following technical scheme: an automatic calibration method of an oxygenerator comprises the following specific steps:
S1, setting adsorption time length X as A seconds, firstly setting pressure equalizing time length J as B seconds, and adjusting reference Rx as C seconds;
S2, automatically adjusting the adsorption time length X, and obtaining the optimal adsorption time length Xg in the adjustment reference Rx;
s3, setting X as Xg seconds, setting the equalizing time length J as B seconds, and setting the adjusting reference Rj of the equalizing time length J as D seconds;
s4, automatically adjusting the equalizing time length J, and obtaining the optimal equalizing time length Jg in the adjustment reference Rj;
s5, setting J as Jg seconds, and setting an adjustment reference Rx of the adsorption time length X as a part of C;
s6, automatically adjusting the adsorption time length X, and obtaining the optimal adsorption time length Xg in the adjustment reference Rx;
S7, setting X as Xg, wherein the X, J value is the optimal value.
Preferably, in the step S1, a value A, B, C is set according to the actual situation, and the adsorption duration of the normal oxygenerator is between 1 second and 15 seconds, and the pressure equalizing duration is between 0.0 second and 1.6 seconds.
Further, in the present adjustment, the oxygen concentration is maximized when the adsorption period is Xg seconds.
Further, in the step S4, in the current adjustment, when the equalizing time is Jg seconds, the oxygen concentration is the maximum.
Further, in the step S5, rx is 1/4 of C because of fine tuning.
Further, in the present adjustment, the S6 is the oxygen concentration is the largest when the adsorption period is Xg seconds.
Further, the method for automatically calibrating the oxygenerator discovers that X is from minimum to maximum, the oxygen production concentration is from first big to small, then J is from minimum to maximum, the oxygen production concentration is from first big to small, after the value of J is changed, the optimal X has small change, fine adjustment is needed to be carried out so as to quickly and automatically adjust Rx or Ry to the optimal X or J within a set range, and a halving adjustment method can be adopted according to experimental characteristics.
Further, the process of automatically adjusting the adsorption time length X is as follows:
S1, setting the adsorption time length as X, fixing the pressure equalizing as J, and setting the range variable r as Rx;
s2, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration H1 at the moment;
S3, setting adsorption time length X=X-r;
s4, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration at the moment as H2;
S5, setting adsorption time length X=X+r;
s6, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration at the moment as H3;
S7, taking the adsorption time length corresponding to the maximum value of H1, H2 and H3, and setting the adsorption time length as Xmax;
S8, judging the size of r.
Further, the method for adjusting the equalizing time period J is similar to the method for adjusting the adsorption time period X, and is as follows:
S1, fixing adsorption time length to be X, setting pressure equalizing time length to be J, and setting range variable r to be Rj;
s2, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration H1 at the moment;
s3, setting a voltage equalizing time length J=J-r;
s4, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration at the moment as H2;
S5, setting a voltage equalizing time length J=J+r;
s6, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration at the moment as H3;
s7, taking the equalizing time length corresponding to the maximum value of H1, H2 and H3, and setting the equalizing time length as JMax;
S8, judging the size of r.
Further, in the process of automatically adjusting the adsorption duration X, if the size of the judgment r is r > =duration precision, setting the adsorption duration X as Xmax, turning r to half, then turning to step2, and if r < duration precision, obtaining the optimal adsorption duration Xg as Xmax, and ending the process;
in the method for adjusting the equalizing time length J, if the size of the judgment r is r > =time length precision, the equalizing time length J is set to be Jmax, r is halved, then the step 2 is shifted, and if r < time length precision, the optimal equalizing time length Jg is obtained to be Jmax, and the process is ended
(II) advantageous effects
The invention provides an automatic calibration method of an oxygenerator. The beneficial effects are as follows: compared with the traditional method, the method adopts a manual mode to calibrate X, J time length, the optimal oxygen concentration of the machine is obtained by manually adjusting various X, J parameter combinations, time and labor are consumed, the method can be used for quickly and automatically adjusting X, J time length to achieve the optimal oxygen concentration, and multiple machines can be calibrated simultaneously in production, so that the efficiency is improved.
Drawings
FIG. 1 is a schematic view of a solenoid valve and oxygen generating column section of an oxygen generator of the present invention;
FIG. 2 is a process step diagram of the present invention;
FIG. 3 is a flow chart of the process of automatically adjusting the adsorption time length X according to the invention;
fig. 4 is a flowchart of the present invention for automatically adjusting the adsorption period J.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
As shown in fig. 1, an embodiment of the present invention provides a method for automatically calibrating an oxygenerator, the method for automatically calibrating the oxygenerator includes the following specific steps:
s1, setting adsorption time length X as A seconds, firstly setting pressure equalizing time length J as B seconds, and adjusting reference Rx as C seconds. The value of A, B, C is set according to the actual situation. Such as: the adsorption time of the common oxygenerator is between 1 second and 15 seconds, the pressure equalizing time is between 0.0 second and 1.6 seconds, in the example, the value A can be 8 seconds, the value B can be 0.8 seconds, and the value C can be 4 seconds;
s2, automatically adjusting the adsorption time length X, and obtaining the optimal adsorption time length Xg in the adjustment reference Rx (namely, in the adjustment, when the adsorption time length is Xg seconds, the oxygen concentration is maximum). In this round of adjustment, for convenience of explanation, it is assumed that Xg is obtained for 3 seconds;
S3, setting X as Xg seconds (3 seconds in the example), setting the equalizing time length J as B seconds, and setting the adjusting reference Rj of the equalizing time length J as D seconds. In this example, D may be 0.4 seconds;
S4, automatically adjusting the pressure equalizing time length J, and obtaining the optimal pressure equalizing time length Jg in the adjustment within the adjustment reference Rj (namely, in the adjustment, when the pressure equalizing time length is Jg seconds, the oxygen concentration is maximum). In this round of adjustment, for convenience of explanation, it is assumed that the obtained Jg is 0.6 seconds;
s5, setting J to Jg seconds (0.6 seconds in the example), and setting the adjustment reference Rx of the adsorption time length X to be a part of C, wherein Rx is 1/4 of C in the example because of fine adjustment at this time: 1 second;
S6, automatically adjusting the adsorption time length X, and obtaining the optimal adsorption time length Xg in the adjustment reference Rx (namely, in the adjustment, when the adsorption time length is Xg seconds, the oxygen concentration is maximum). In this round of adjustment, for convenience of explanation, it is assumed that Xg is obtained for 3.5 seconds;
S7, setting X as Xg, wherein the X, J value at the moment is the optimal value, namely: x is 3.5 seconds and J is 0.6 seconds.
Through experiments, the following steps are found:
X is from the minimum to the maximum (from 1 second to 16 seconds in the example), and the oxygen production concentration is firstly big and then small;
j is from minimum to maximum (from 0.0 seconds to 1.6 seconds in the example), and the oxygen production concentration is firstly big and then small;
3. After changing the value of J, the optimal X has a slight change, and fine adjustment is needed, so that in order to quickly and automatically adjust to the optimal X or J within a set range (Rx or Ry), according to experimental characteristics, a halving adjustment method can be adopted, and the process of automatically adjusting the adsorption duration X is shown in fig. 3:
1. setting the adsorption time length as X, fixing the pressure equalizing as J, and setting the range variable r as Rx
2. Waiting for the oxygen concentration to stabilize (different from the randomizer, usually 3 to 4 minutes) to obtain the oxygen concentration H1 at this time
3. Setting the adsorption period x=x-r
4. Waiting for the oxygen concentration to stabilize, obtaining the oxygen concentration at the moment as H2
5. Setting the adsorption period x=x+r
6. Waiting for the oxygen concentration to stabilize, obtaining the oxygen concentration at this time as H3
7. The adsorption time length corresponding to the maximum value of H1, H2 and H3 is set as Xmax.
8. Judging the size of r, if:
(1) r > = duration precision, then: setting the adsorption time length X as Xmax, and halving r (namely, r=r is 0.5); and then go to step 2.
(2) R < duration precision, then: and obtaining the optimal adsorption time Xg as Xmax, and ending the process.
The time accuracy of adsorption is typically 0.1 seconds.
The above method steps are exemplified in the following table, which describes the optimal adsorption period finally obtained for 3.5 seconds when the adsorption period X is initially 3.0 seconds and Rx is 1 second.
The method of adjusting the equalizing time period J is similar to the method of adjusting the adsorption time period X, as shown in fig. 4:
1. fixing the adsorption time length to X, setting the pressure equalizing time length to J, and setting the range variable r to Rj
2. Waiting for the oxygen concentration to stabilize to obtain the oxygen concentration H1 at that time
3. Setting the equalizing time length J=J-r
4. Waiting for the oxygen concentration to stabilize, obtaining the oxygen concentration at the moment as H2
5. Setting the equalizing time length J=J+r
6. Waiting for the oxygen concentration to stabilize, obtaining the oxygen concentration at this time as H3
7. Taking the equalizing time length corresponding to the maximum value of H1, H2 and H3, and setting the equalizing time length as JMax.
8. Judging the size of r, if:
(1) r > = duration precision, then: setting the equalizing time J as Jmax, and halving r (namely, r=r is 0.5); and then go to step 2.
(2) R < duration precision, then: obtaining the optimal equalizing time Jg as Jmax, and ending the process.
The time accuracy of the pressure equalization is typically 0.1 seconds.
Although embodiments of the present invention 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 invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An automatic calibration method for an oxygenerator is characterized by comprising the following steps: the automatic calibration method of the oxygenerator comprises the following specific steps:
S1, setting adsorption time length X as A seconds, firstly setting pressure equalizing time length J as B seconds, and adjusting reference Rx as C seconds;
S2, automatically adjusting the adsorption time length X, and obtaining the optimal adsorption time length Xg in the adjustment reference Rx;
s3, setting X as Xg seconds, setting the equalizing time length J as B seconds, and setting the adjusting reference Rj of the equalizing time length J as D seconds;
s4, automatically adjusting the equalizing time length J, and obtaining the optimal equalizing time length Jg in the adjustment reference Rj;
s5, setting J as Jg seconds, and setting an adjustment reference Rx of the adsorption time length X as a part of C;
s6, automatically adjusting the adsorption time length X, and obtaining the optimal adsorption time length Xg in the adjustment reference Rx;
S7, setting X as Xg, wherein the X, J value is the optimal value.
2. The method for automatic calibration of an oxygenerator according to claim 1, wherein: in the step S1, a value A, B, C is set according to the actual situation, the adsorption time of a common oxygenerator is between 1 second and 15 seconds, and the pressure equalizing time is between 0.0 second and 1.6 seconds.
3. The method for automatic calibration of an oxygenerator according to claim 1, wherein: in the current regulation, the S2 has the maximum oxygen concentration when the adsorption time length is Xg seconds.
4. The method for automatic calibration of an oxygenerator according to claim 1, wherein: and S4, in the current regulation, when the pressure equalizing time is Jg seconds, the oxygen concentration is maximum.
5. The method for automatic calibration of an oxygenerator according to claim 1, wherein: in the step S5, rx is 1/4 of C because of fine tuning.
6. The method for automatic calibration of an oxygenerator according to claim 1, wherein: in the current regulation, the oxygen concentration is maximum when the adsorption time is Xg seconds.
7. The method for automatic calibration of an oxygenerator according to claim 1, wherein: experiments show that X is from minimum to maximum, the oxygen production concentration is from first to last, the optimal X has small change after changing the value of J, fine adjustment is needed to be carried out so as to quickly and automatically adjust Rx or Ry to the optimal X or J within a set range, and a halving adjustment method can be adopted according to experimental characteristics.
8. The method for automatic calibration of an oxygenerator according to claim 1, wherein: the process of automatically adjusting the adsorption time length X is as follows:
S1, setting the adsorption time length as X, fixing the pressure equalizing as J, and setting the range variable r as Rx;
s2, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration H1 at the moment;
S3, setting adsorption time length X=X-r;
s4, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration at the moment as H2;
S5, setting adsorption time length X=X+r;
s6, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration at the moment as H3;
S7, taking the adsorption time length corresponding to the maximum value of H1, H2 and H3, and setting the adsorption time length as Xmax;
S8, judging the size of r.
9. The method for automatic calibration of an oxygen generator according to claim 8, wherein: the method for adjusting the pressure equalizing time length J is similar to the method for adjusting the adsorption time length X, and is as follows:
S1, fixing adsorption time length to be X, setting pressure equalizing time length to be J, and setting range variable r to be Rj;
s2, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration H1 at the moment;
s3, setting a voltage equalizing time length J=J-r;
s4, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration at the moment as H2;
S5, setting a voltage equalizing time length J=J+r;
s6, waiting for the oxygen concentration to be stable, and obtaining the oxygen concentration at the moment as H3;
s7, taking the equalizing time length corresponding to the maximum value of H1, H2 and H3, and setting the equalizing time length as JMax;
S8, judging the size of r.
10. The method for automatic calibration of an oxygenerator according to claim 1, wherein: the size of the judgment r in the process of automatically adjusting the adsorption duration X is r > =duration precision, the adsorption duration X is set to be Xmax, r is halved, then the step2 is carried out, and when r < duration precision, the optimal adsorption duration Xg is obtained to be Xmax, and the process is ended;
In the method for adjusting the equalizing time length J, the equalizing time length J is set to be Jmax when the size of the judgment r is equal to r > =time length precision, the r is halved, then the step 2 is carried out, and the optimal equalizing time length Jg is obtained as Jmax when the r is equal to the time length precision, and the process is ended.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932831A (en) * | 2006-04-03 | 2010-12-29 | 伟康公司 | Portable oxygen concentrator |
| CN112957887A (en) * | 2021-01-28 | 2021-06-15 | 中石化南京工程有限公司 | Full-automatic ammonia adding method and system for ammonia desulphurization device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0760247A3 (en) * | 1995-08-30 | 1997-04-23 | Devilbiss Health Care Inc | Oxygen concentrator monitoring system |
| US5858063A (en) * | 1997-06-03 | 1999-01-12 | Litton Systems, Inc. | Oxygen concentrator with beds' duty cycle control and self-test |
| US8016918B2 (en) * | 2006-10-04 | 2011-09-13 | Air Products And Chemicals, Inc. | Performance stability in rapid cycle pressure swing adsorption systems |
| CN101428763B (en) * | 2008-11-26 | 2011-01-19 | 翁兆国 | Adsorption column top cover integration of oxygen generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101932831A (en) * | 2006-04-03 | 2010-12-29 | 伟康公司 | Portable oxygen concentrator |
| CN112957887A (en) * | 2021-01-28 | 2021-06-15 | 中石化南京工程有限公司 | Full-automatic ammonia adding method and system for ammonia desulphurization device |
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