CN216594956U - Industrial gas on-line gas chromatography analysis system - Google Patents
Industrial gas on-line gas chromatography analysis system Download PDFInfo
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- CN216594956U CN216594956U CN202123269416.8U CN202123269416U CN216594956U CN 216594956 U CN216594956 U CN 216594956U CN 202123269416 U CN202123269416 U CN 202123269416U CN 216594956 U CN216594956 U CN 216594956U
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Abstract
The utility model discloses an industrial gas online gas chromatography analysis system, which comprises a conveying gas circuit, an online gas chromatograph and a PLC control cabinet, wherein the conveying gas circuit is not less than two paths, and each path of the conveying gas circuit is corresponding to an electric switching valve, a mechanical impurity filter, a moisture filter, an oil gas filter, a pressure regulating front end pressure gauge, a pressure regulating rear end pressure gauge, a pressure regulating valve and a one-way valve; the PLC electric control cabinet is connected to an I/O signal input contact of the PLC control cabinet through an I/O signal output contact of the online gas chromatograph, and the I/O signal output contact of the PLC control cabinet is connected to a circuit control device of the electric switching valve. The utility model discloses, can realize that an online gas chromatograph detects a plurality of technology section pipeline gas circuits, save analysis adoption time, eliminate artificial adoption analysis error, the analysis data is reliable, has reduced the technology quality control cost of mill, practices thrift manpower and materials.
Description
Technical Field
The utility model relates to an industrial gas on-line analysis technical field specifically is an industrial gas on-line gas chromatography analysis system.
Background
The on-line gas chromatography is a derivative of gas chromatography, and is a chromatographic analysis method taking gas as a mobile phase. Because the viscosity of the gas is low and the material is quickly balanced in the gas phase, the gas can be used as the mobile phase and can be separated by a longer separation column at a higher flow velocity, thereby greatly improving the separation capacity.
In the chemical production process, in order to ensure the accuracy of production process parameters, the reaction gas of each process section pipeline is often required to be sampled and analyzed. In the prior multi-gas-path gas analysis process, the gas paths are switched manually to complete the analysis control process, so that the links of the gas analysis are not connected, and the accuracy of the gas analysis is influenced; if the operation process is neglected slightly, cross contamination of multi-path gas can be caused, and the analysis result is influenced; and in gas analysis, the number of gas paths is large (up to 64 paths), the gas path is long (2 km from a gas sampling site to a data processing link), the analysis time is long, the manual control working efficiency is low, and the labor intensity is high. Particularly, the defects of various pipelines, strict production control, great waste of manpower and material resources, heavy labor and time delay of manual offline sampling in large-scale factories are shown.
The process is complicated in large-scale factory, and when a plurality of process section pipeline gas circuits detected through the same online gas chromatograph, because each process section pipeline gas circuit source is different, often the pressure is different, still can contain material such as water, dust, oil hydrocarbon, online gas chromatograph belongs to precision instrument again, treats that the sample detected requires highly, and the gas that contains impurity can not directly get into gas chromatography detecting element, otherwise can cause the analysis result to appear the deviation, seriously then can damage online gas chromatograph.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an online gas chromatography system of industrial gas to solve the problem among the prior art.
In order to achieve the above object, the utility model provides a following technical scheme: an industrial gas online gas chromatography analysis system comprises a conveying gas path, an online gas chromatograph and a PLC control cabinet, wherein the conveying gas path is not less than two paths, and each conveying gas path is correspondingly provided with an electric switching valve, a mechanical impurity filter, a moisture filter, an oil gas filter, a pressure regulating front end pressure gauge, a pressure regulating rear end pressure gauge, a pressure regulating valve and a one-way valve;
the PLC electric control cabinet is connected to an I/O signal input contact of a PLC control cabinet through an I/O signal output contact of an online gas chromatograph, and the I/O signal output contact of the PLC control cabinet is connected to a circuit control device of the electric switching valve;
and an electric switching valve, a mechanical impurity filter, a moisture filter, an oil gas filter and a pressure regulating valve are sequentially connected between the conveying gas path and the one-way valve.
Preferably, still include the industrial computer, the signal output contact of PLC switch board is connected to the industrial computer through the serial port line.
Preferably, the air outlet path connection point of the electric switching valve is communicated with the corresponding air inlet path connection point.
Preferably, the on-line gas chromatograph is provided with a sample injection valve at the position of the sample injection port, and a switching signal of the sample injection valve is transmitted to an I/O signal output contact of the on-line gas chromatograph through a signal line.
Preferably, the on-line gas chromatograph comprises a carrier gas inlet, a carrier gas inlet into the gasification chamber, a sample gas outlet quantitative tube outlet, a sample gas inlet and a product gas inlet quantitative tube inlet.
Preferably, the conveying gas path comprises a first conveying gas path, a second conveying gas path and a third conveying gas path; the electric changeover valve includes a first electric changeover valve, a second electric changeover valve, and a third electric changeover valve; the mechanical impurity filter comprises a first mechanical impurity filter, a second mechanical impurity filter and a third mechanical impurity filter; the moisture filter comprises a first moisture filter, a second moisture filter and a third moisture filter; the oil and gas filter comprises a first oil and gas filter, a second oil and gas filter and a third oil and gas filter; the pressure regulating front end pressure gauge comprises a first pressure regulating front end pressure gauge, a second pressure regulating front end pressure gauge and a third pressure regulating front end pressure gauge; the pressure regulating valves comprise a first pressure regulating valve, a second pressure regulating valve and a third pressure regulating valve; the pressure regulating rear end pressure gauge comprises a first pressure regulating rear end pressure gauge, a second pressure regulating rear end pressure gauge and a third pressure regulating rear end pressure gauge; the check valve includes a first check valve, a second check valve and a third check valve.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) a mechanical impurity filter, a moisture filter and an oil gas filter are additionally arranged, impurities which cannot enter the gas chromatograph and substances which can influence the analysis result are removed in advance, the long-term stable operation of the on-line gas chromatograph is ensured, and the accuracy of the detection result is high;
(2) the pressure sensor, the pressure gauge at the front end of pressure regulation, the pressure gauge at the rear end of pressure regulation and the pressure regulating valve device are additionally arranged, so that the pressure of the air inlet channel can be monitored in real time, the gas chromatography damage caused by the overlarge pressure of the gas to be detected is prevented, and the early warning can be given to maintenance personnel;
(3) the gas is injected and replaced through the six-way valve, and the volume of the injected gas is controlled through the quantitative ring, so that the gas can be completely replaced, the sample injection amount is stable, no dead volume exists, the detection accuracy of the sample is high, and the stability is good;
(4) a plurality of air inlet channels, an automatic sampling system and a high-sensitivity gas detector are controlled through a plurality of electromagnetic switching valves in a one-to-one correspondence mode, the sampling control system can realize that one online gas chromatograph detects a plurality of process section pipeline gas circuits, the hysteresis of monitoring data is effectively improved, errors generated in the process of sample collection, storage and transportation are reduced, analysis time is saved, analysis errors caused by manual adoption are eliminated, analysis data are reliable, the process quality control cost of a factory is reduced, and manpower and material resources are saved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic diagram of the sampling state of the gas chromatography six-way valve of the present invention;
fig. 3 is a schematic diagram of the sample introduction state of the gas chromatography six-way valve of the present invention.
In the figure: 1. a first conveying gas path; 2. a second conveying gas path; 3. a third conveying gas path; 4. a first electrically operated switching valve; 5. a second electrically operated switching valve; 6. a third electric switch valve; 7. a first mechanical impurity filter; 8. a second mechanical impurity filter; 9. a third mechanical impurity filter; 10. a first moisture filter; 11. a second moisture filter; 12. a third moisture filter; 13. a first oil and gas filter; 14. a second oil and gas filter; 15. a third oil gas filter; 16. a first pressure regulating front end pressure gauge; 17. a second pressure regulating front end pressure gauge; 18. a third pressure regulating front end pressure gauge; 19. a first pressure regulating valve; 20. a second pressure regulating valve; 21. a third pressure regulating valve; 22. a first pressure regulating rear end pressure gauge; 23. a second pressure regulating rear end pressure gauge; 24. a third pressure regulating rear end pressure gauge; 25. a first check valve; 26. a second one-way valve; 27. a third check valve; 28. an online gas chromatograph; 29. a PLC control cabinet; 30. and an industrial personal computer.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, in an embodiment of the present invention, an industrial gas online gas chromatography analysis system includes a conveying gas path, an online gas chromatograph 28, and a PLC control cabinet 29, where the conveying gas path is not less than two paths, and each conveying gas path corresponds to an electric switching valve, a mechanical impurity filter, a moisture filter, an oil-gas filter, a pressure-regulating front-end pressure gauge, a pressure-regulating rear-end pressure gauge, a pressure-regulating valve, and a check valve;
the PLC electric control cabinet is connected to an I/O signal input contact of a PLC control cabinet 29 through an I/O signal output contact of an online gas chromatograph, and the I/O signal output contact of the PLC control cabinet 29 is connected to a circuit control device of the electric switching valve;
an electric switching valve, a mechanical impurity filter, a moisture filter, an oil gas filter and a pressure regulating valve are sequentially connected between the conveying gas path and the one-way valve;
the electric switching valve has the function of controlling each gas path to independently intake air; the mechanical impurity filter has the function of removing mechanical impurities such as dust and the like in gas chromatography sample injection gas; the moisture filter has the function of removing moisture in gas chromatography sample injection gas; the oil gas filter has the function of removing oil gas in gas chromatography sample injection gas; the pressure gauge at the front end of the pressure regulation has the function of monitoring the pressure of gas entering the air inlet channel in real time; the pressure gauge at the rear end of the pressure regulation has the function of monitoring the pressure of gas to be detected entering the gas chromatograph in real time; the pressure regulating valve has the function of regulating the gas pressure in the gas inlet channel, and ensures that the sample gas meets the pressure requirement of the gas chromatography sample gas; the one-way valve is used for preventing gas in the gas inlet channel from flowing backwards and ensuring that the gas to be detected smoothly enters the gas chromatograph;
the device also comprises an industrial personal computer 30, wherein a signal output contact of the PLC control cabinet 29 is connected to the industrial personal computer 30 through a serial port line;
the air outlet gas path joint of the electric switching valve is communicated with the corresponding air inlet gas path joint;
the on-line gas chromatograph 28 is provided with a sample injection valve at the position of a sample injection port, and a switching signal of the sample injection valve is transmitted to an I/O signal output contact of the on-line gas chromatograph 28 through a signal line;
the on-line gas chromatograph 28 comprises a carrier gas inlet, a carrier gas inlet into the gasification chamber, a sample gas outlet quantitative tube outlet, a sample gas inlet and a product gas inlet quantitative tube inlet;
the conveying gas path comprises a first conveying gas path 1, a second conveying gas path 2 and a third conveying gas path 3; the electric changeover valves include a first electric changeover valve 4, a second electric changeover valve 5, and a third electric changeover valve 6; the mechanical impurity filter comprises a first mechanical impurity filter 7, a second mechanical impurity filter 8 and a third mechanical impurity filter 9; the moisture filters include a first moisture filter 10, a second moisture filter 11, and a third moisture filter 12; the oil and gas filter comprises a first oil and gas filter 13, a second oil and gas filter 14 and a third oil and gas filter 15; the pressure regulating front end pressure gauge comprises a first pressure regulating front end pressure gauge 16, a second pressure regulating front end pressure gauge 17 and a third pressure regulating front end pressure gauge 18; the pressure regulating valves comprise a first pressure regulating valve 19, a second pressure regulating valve 20 and a third pressure regulating valve 21; the pressure regulating rear end pressure gauge comprises a first pressure regulating rear end pressure gauge 22, a second pressure regulating rear end pressure gauge 23 and a third pressure regulating rear end pressure gauge 24; the check valves include a first check valve 25, a second check valve 26, and a third check valve 27;
the first electric switching valve 4, the second electric switching valve 5 and the third electric switching valve 6 are one-in one-out electric switching valves, which respectively control three-way air inlet of the air inlet pipelines 1, 2 and 3, and three air path outlets are all connected to the sample inlet of the same online gas chromatograph 28, the I/O signal output of the PLC control cabinet 29 is connected to the circuit control devices of the first electric switching valve 4, the second electric switching valve 5 and the third electric switching valve 6 through signal lines, the output signals of the circuit devices of the first pressure regulating front-end pressure gauge 16, the second pressure regulating front-end pressure gauge 17 and the third pressure regulating front-end pressure gauge 18 are connected to the I/O signal input of the PLC control cabinet 29 through signal lines, the I/O signal output of the PLC control cabinet 10 is connected to the circuit control devices of the first pressure regulating valve 19, the second pressure regulating valve 20 and the third pressure regulating valve 21 through signal lines, the first pressure regulating rear end pressure gauge 22, the second pressure regulating rear end pressure gauge 23 and the third pressure regulating rear end pressure gauge 24 are connected to the I/O signal input of the PLC control cabinet 29 through signal lines, and the I/O signal output of the online gas chromatograph 28 is connected to the I/O signal input contact of the PLC control cabinet 29 through signal lines; the RS232 signal output of the PLC control cabinet 29 is connected to an RS232 signal input contact of the industrial personal computer 30 through an RS232 serial port line;
the on-line gas chromatograph 28 is provided with a six-way sample injection valve at the position of the sample injection port, and a switching signal of the sample injection valve is transmitted to an I/O signal output of the on-line gas chromatograph 28 through a signal line to be connected with electricity;
the PLC control cabinet 29 has a control program written therein, and the control program can output corresponding I/O signals and RS232 signals according to the I/O signals input to the PLC control cabinet 29; the output RS232 signal is transmitted to the industrial personal computer 30 for synchronizing the sample introduction state of the industrial personal software interface; the control program of the PLC can control the first electric switching valve 4, the second electric switching valve 5 and the third electric switching valve 6 to switch in advance by half of an analysis period, and because sample gas of the online gas chromatograph 28 does not need to enter an analysis gas path in the latter half of the analysis period, gas to be measured in the next analysis period can be preprocessed, and gas replacement in a pipeline is finished before the next analysis period starts;
specifically, the method comprises the following steps: in the initial state of the operation of the above-mentioned equipment, the first electric changeover valve 4, the second electric changeover valve 5 and the third electric changeover valve 6 are all in the closed state; the PLC control cabinet 29 outputs an I/O signal to the electromagnetic switching valve 4 (a circuit control device of the electromagnetic switching valve), at this time, the first electromagnetic switching valve 4 is opened, the gas transmission path 1 starts to intake gas, the gas once passes through the first mechanical impurity filter 7, the first moisture filter 10, the first oil-gas filter 13, the first pressure-regulating front-end pressure gauge 16, the first pressure-regulating valve 19, the first pressure-regulating rear-end pressure gauge 22, and the first check valve 25, and then enters the sample inlet of the online gas chromatograph 28, and at this time, the six-way valve of the sample inlet is in a sampling state, as shown in fig. 2; the first pressure regulating valve 19 is regulated through the PLC control cabinet 29, so that the sample gas of the conveying gas circuit 1 meets the gas chromatography sample gas pressure condition; after the gas chromatography sampling is finished, the six-way valve is changed into a sample introduction state, as shown in fig. 3; detecting No. 1 gas by using an online gas chromatography;
after the No. 1 gas is analyzed, the online gas chromatograph 28 outputs a signal to the PLC control cabinet 29 through transmission, the PLC control cabinet 29 receives the signal and then synchronously outputs the signal to the first electric switching valve 4 and the second electric switching valve 5 (circuit control device of the electromagnetic switching valve), at this time, the first electromagnetic switching valve 4 is closed, the second electromagnetic switching valve 5 is opened, the gas transmission path 2 starts to admit gas, the gas once passes through the second mechanical impurity filter 8, the second moisture filter 11, the second oil-gas filter 14, the second pressure regulation front-end pressure gauge 17, the second pressure regulation valve 20, the second pressure regulation rear-end pressure gauge 23, and the second check valve 26, the gas enters the sample inlet of the online gas chromatograph 28, and at this time, the six-way valve of the sample inlet is in a sampling state, as shown in fig. 2; the second pressure regulating valve 20 is regulated through the PLC control cabinet 29, so that the sample gas in the conveying gas circuit 2 meets the pressure condition of the gas chromatography sample gas; after the gas chromatography sampling is finished, the six-way valve is changed into a sample introduction state, as shown in fig. 3; the online gas chromatography starts to detect the No. 2 gas;
after the No. 2 gas is analyzed, the online gas chromatograph 28 outputs a signal to the PLC control cabinet 29 through transmission, the PLC control cabinet 29 receives the signal and then synchronously outputs the signal to the second electric switching valve 5 and the third electric switching valve 6 (circuit control device of the electromagnetic switching valve), at this time, the second electromagnetic switching valve 5 is closed, the third electromagnetic switching valve 6 is opened, the gas transmission path 3 starts to intake gas, the gas once passes through the third mechanical impurity filter 9, the third moisture filter 12, the third oil-gas filter 15, the third pressure regulation front-end pressure gauge 18, the third pressure regulation valve 21, the third pressure regulation rear-end pressure gauge 24 and the third check valve 27, the gas enters the sample inlet of the online gas chromatograph 28, and at this time, the six-way valve of the sample inlet is in a sampling state, as shown in fig. 2; the third pressure regulating valve 21 is regulated by the PLC control cabinet 29, so that the sample gas in the conveying gas circuit 3 meets the pressure condition of the gas chromatography sample gas; after the gas chromatography sampling is finished, the six-way valve is changed into a sample introduction state, as shown in fig. 3; detecting No. 3 gas by using an online gas chromatography;
after the No. 3 gas is analyzed, the online gas chromatograph 28 outputs a signal to the PLC control cabinet 29 through transmission, the PLC control cabinet 29 receives the signal and then synchronously outputs the signal to the third electromagnetic switching valve 6 and the first electromagnetic switching valve 4 (a circuit control device of the electromagnetic switching valve), at this time, the third electromagnetic switching valve 6 is closed, the first electromagnetic switching valve 4 is opened, the gas transmission path 1 starts to intake gas, the gas once passes through the first mechanical impurity filter 7, the first moisture filter 10, the first oil-gas filter 13, the first pressure regulating front-end pressure gauge 16, the first pressure regulating valve 19, the first pressure regulating rear-end pressure gauge 22 and the first check valve 25, the gas enters the sample inlet of the online gas chromatograph 28, and at this time, the six-way valve of the sample inlet is in a sampling state, as shown in fig. 2; the first pressure regulating valve 19 is regulated through the PLC control cabinet 29, so that the sample gas of the conveying gas circuit 3 meets the pressure condition of the gas chromatography sample gas; after the gas chromatography sampling is finished, the six-way valve is changed into a sample introduction state, as shown in fig. 3; detecting No. 1 gas by using an online gas chromatography;
the method and the device are repeated, so that the gas chromatograph can detect the gas circuits of a plurality of process sections, the hysteresis of monitoring data is effectively improved, errors generated in the processes of sample collection, storage and transportation are reduced, the analysis data is reliable, and the process quality control cost of a factory is reduced.
The utility model discloses a theory of operation is: the first electric changeover valve 4, the second electric changeover valve 5, and the third electric changeover valve 6 are all in a closed state; the PLC control cabinet 29 outputs an I/O signal to the electromagnetic switching valve 4 (a circuit control device of the electromagnetic switching valve), at this time, the first electromagnetic switching valve 4 is opened, the gas transmission path 1 starts to intake gas, the gas once passes through the first mechanical impurity filter 7, the first moisture filter 10, the first oil-gas filter 13, the first pressure-regulating front-end pressure gauge 16, the first pressure-regulating valve 19, the first pressure-regulating rear-end pressure gauge 22, and the first check valve 25, and then enters the sample inlet of the online gas chromatograph 28, and at this time, the six-way valve of the sample inlet is in a sampling state, as shown in fig. 2; the first pressure regulating valve 19 is regulated through the PLC control cabinet 29, so that the sample gas of the conveying gas circuit 1 meets the gas chromatography sample gas pressure condition; after the gas chromatography sampling is finished, the six-way valve is changed into a sample introduction state, as shown in fig. 3; detecting No. 1 gas by using an online gas chromatography;
after the No. 1 gas is analyzed, the online gas chromatograph 28 outputs a signal to the PLC control cabinet 29 through transmission, the PLC control cabinet 29 receives the signal and then synchronously outputs the signal to the first electric switching valve 4 and the second electric switching valve 5 (circuit control device of the electromagnetic switching valve), at this time, the first electromagnetic switching valve 4 is closed, the second electromagnetic switching valve 5 is opened, the gas transmission path 2 starts to admit gas, the gas once passes through the second mechanical impurity filter 8, the second moisture filter 11, the second oil-gas filter 14, the second pressure regulation front-end pressure gauge 17, the second pressure regulation valve 20, the second pressure regulation rear-end pressure gauge 23, and the second check valve 26, the gas enters the sample inlet of the online gas chromatograph 28, and at this time, the six-way valve of the sample inlet is in a sampling state, as shown in fig. 2; the second pressure regulating valve 20 is regulated through the PLC control cabinet 29, so that the sample gas in the conveying gas circuit 2 meets the pressure condition of the gas chromatography sample gas; after the gas chromatography sampling is finished, the six-way valve is changed into a sample introduction state, as shown in fig. 3; the online gas chromatography starts to detect the No. 2 gas;
after the No. 2 gas is analyzed, the online gas chromatograph 28 outputs a signal to the PLC control cabinet 29 through transmission, the PLC control cabinet 29 receives the signal and then synchronously outputs the signal to the second electric switching valve 5 and the third electric switching valve 6 (circuit control device of the electromagnetic switching valve), at this time, the second electromagnetic switching valve 5 is closed, the third electromagnetic switching valve 6 is opened, the gas transmission path 3 starts to intake gas, the gas once passes through the third mechanical impurity filter 9, the third moisture filter 12, the third oil-gas filter 15, the third pressure regulation front-end pressure gauge 18, the third pressure regulation valve 21, the third pressure regulation rear-end pressure gauge 24 and the third check valve 27, the gas enters the sample inlet of the online gas chromatograph 28, and at this time, the six-way valve of the sample inlet is in a sampling state, as shown in fig. 2; the third pressure regulating valve 21 is regulated by the PLC control cabinet 29, so that the sample gas in the conveying gas circuit 3 meets the pressure condition of the gas chromatography sample gas; after the gas chromatography sampling is finished, the six-way valve is changed into a sample introduction state, as shown in fig. 3; detecting No. 3 gas by using an online gas chromatography;
after the No. 3 gas is analyzed, the online gas chromatograph 28 outputs a signal to the PLC control cabinet 29 through transmission, the PLC control cabinet 29 receives the signal and then synchronously outputs the signal to the third electromagnetic switching valve 6 and the first electromagnetic switching valve 4 (a circuit control device of the electromagnetic switching valve), at this time, the third electromagnetic switching valve 6 is closed, the first electromagnetic switching valve 4 is opened, the gas transmission path 1 starts to intake gas, the gas once passes through the first mechanical impurity filter 7, the first moisture filter 10, the first oil-gas filter 13, the first pressure regulating front-end pressure gauge 16, the first pressure regulating valve 19, the first pressure regulating rear-end pressure gauge 22 and the first check valve 25, the gas enters the sample inlet of the online gas chromatograph 28, and at this time, the six-way valve of the sample inlet is in a sampling state, as shown in fig. 2; the first pressure regulating valve 19 is regulated through the PLC control cabinet 29, so that the sample gas of the conveying gas circuit 3 meets the pressure condition of the gas chromatography sample gas; after the gas chromatography sampling is finished, the six-way valve is changed into a sample introduction state, as shown in fig. 3; detecting No. 1 gas by using an online gas chromatography;
the method and the device are repeated, so that the gas chromatograph can detect the gas circuits of a plurality of process sections, the hysteresis of monitoring data is effectively improved, errors generated in the sample collection, storage and transportation processes are reduced, the analysis data is reliable, and the process quality control cost of a factory is reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An industrial gas on-line gas chromatographic analysis system is characterized in that: the device comprises a conveying gas path, an online gas chromatograph (28) and a PLC control cabinet (29), wherein the conveying gas path is not less than two paths, and each conveying gas path is correspondingly provided with an electric switching valve, a mechanical impurity filter, a moisture filter, an oil gas filter, a pressure regulating front-end pressure gauge, a pressure regulating rear-end pressure gauge, a pressure regulating valve and a one-way valve;
the PLC electric control cabinet is connected to an I/O signal input contact of a PLC control cabinet (29) through an I/O signal output contact of an online gas chromatograph, and the I/O signal output contact of the PLC control cabinet (29) is connected to a circuit control device of the electric switching valve;
and an electric switching valve, a mechanical impurity filter, a moisture filter, an oil gas filter and a pressure regulating valve are sequentially connected between the conveying gas path and the one-way valve.
2. The on-line gas chromatographic analysis system for industrial gas according to claim 1, characterized in that: still include industrial computer (30), the signal output contact of PLC switch board (29) is connected to industrial computer (30) through the serial port line.
3. The on-line gas chromatographic analysis system for industrial gas according to claim 1, characterized in that: and the air outlet path joint of the electric switching valve is communicated with the corresponding air inlet path joint.
4. The on-line gas chromatographic analysis system for industrial gas according to claim 1, characterized in that: and a sample injection valve is arranged at the position of the sample injection port of the online gas chromatograph (28), and a switching signal of the sample injection valve is transmitted to an I/O signal output contact of the online gas chromatograph (28) through a signal line.
5. The on-line gas chromatographic analysis system for industrial gas according to claim 1, characterized in that: the on-line gas chromatograph (28) comprises a carrier gas inlet, a carrier gas inlet gasification chamber inlet, a sample gas outlet quantitative tube outlet, a sample gas inlet and a product gas inlet quantitative tube inlet.
6. The on-line gas chromatographic analysis system for industrial gas according to claim 1, characterized in that: the conveying gas path comprises a first conveying gas path (1), a second conveying gas path (2) and a third conveying gas path (3); the electric changeover valves include a first electric changeover valve (4), a second electric changeover valve (5), and a third electric changeover valve (6); the mechanical impurity filter comprises a first mechanical impurity filter (7), a second mechanical impurity filter (8) and a third mechanical impurity filter (9); the moisture filter comprises a first moisture filter (10), a second moisture filter (11) and a third moisture filter (12); the oil and gas filter comprises a first oil and gas filter (13), a second oil and gas filter (14) and a third oil and gas filter (15); the pressure regulating front-end pressure gauge comprises a first pressure regulating front-end pressure gauge (16), a second pressure regulating front-end pressure gauge (17) and a third pressure regulating front-end pressure gauge (18); the pressure regulating valves comprise a first pressure regulating valve (19), a second pressure regulating valve (20) and a third pressure regulating valve (21); the pressure regulating rear end pressure gauge comprises a first pressure regulating rear end pressure gauge (22), a second pressure regulating rear end pressure gauge (23) and a third pressure regulating rear end pressure gauge (24); the check valves include a first check valve (25), a second check valve (26), and a third check valve (27).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123269416.8U CN216594956U (en) | 2021-12-23 | 2021-12-23 | Industrial gas on-line gas chromatography analysis system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123269416.8U CN216594956U (en) | 2021-12-23 | 2021-12-23 | Industrial gas on-line gas chromatography analysis system |
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| CN216594956U true CN216594956U (en) | 2022-05-24 |
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