A gas optimization device for chromatographic testing

Abstract

The application discloses a kind of gas optimization processing device for chromatographic test, including purification device, refrigeration device, gas flow proportioning device and chromatograph, the outer wall of the purification device is fixedly connected with pipeline, the output of the purification device is fixedly connected with the input of gas flow proportioning device by being set pipeline, the inside of the pipeline includes air gas path, hydrogen gas path, nitrogen gas path, the input end of the nitrogen gas path is fixedly connected with refrigeration device close to gas flow proportioning device.By air, hydrogen is filtered by dehydration medium in the inside of dehydration pipeline, nitrogen is filtered by dehydration medium and deoxidation medium in the inside of deoxidation dehydration pipeline, and high-quality gas source is obtained, at this time, control gas path switch valve so that nitrogen gas path is directly communicated with gas flow proportioning device, gas source is treated by high-precision gas flow proportioning valve in the inside of gas flow proportioning device, and then flows into chromatograph hydrogen flame detector with optimal gas flow ratio, to achieve the effect that ignition success rate is high, and the service life of device is long.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of gas optimization processing device, and particularly relates to a gas optimization processing device for chromatographic test. BACKGROUND

[0002] Chromatographic data is an important basis for judging the health state of power grid equipment, and any factor affecting test accuracy can lead to serious consequences due to misjudgment. We found that the following problems exist when performing chromatographic test:

[0003] 1. The carrier gas flow is unstable, and the test data is biased.

[0004] 2. False peaks are prone to occur, which affects peak shape identification, interferes with test data, and the repeatability r is greater than the standard (10%).

[0005] 3. The normal service life of the chromatographic column is shortened.

[0006] 4. The detector ignition is often unsuccessful, which seriously affects the normal test.

[0007] 5. The cooling time is long, and the cooling after the test needs 30 minutes, and the amount of carrier gas used is 4-6 times of each oil sample.

[0008] Investigation found that the factors leading to the above problems are as follows:

[0009] 1. The air flow control valve has poor reliability and poor flow control effect.

[0010] 2. The presence of trace impurities in the gas source causes abnormal peak shape, leading to changes in test data.

[0011] Among them, oxygen and water in the nitrogen pipeline enter the chromatograph under the action of high temperature, accelerate the aging of the chromatographic column, reduce the service life of the instrument, and interfere with the test data.

[0012] The moisture in the hydrogen and air pipelines affects the normal ignition of the hydrogen flame detector.

[0013] 3. The air and hydrogen ratio is not good, which not only affects the normal ignition of the hydrogen flame detector, but also is not conducive to keeping the instrument in good working condition.

[0014] 4. The cooling intensity is not enough, resulting in long instrument cooling time after the test. SUMMARY

[0015] The gas optimization processing device for chromatographic test aims to solve the problems of poor reliability of the gas flow control valve, abnormal peak shape caused by the trace impurities in the gas source, moisture in the hydrogen and air pipelines, insufficient cooling strength, test data variation, normal ignition of the hydrogen flame detector, and long instrument cooling time after the test.

[0016] To achieve the above object, the present application provides the following technical scheme: a gas optimization processing device for chromatographic test, comprising a purification device, a refrigeration device, a gas flow proportioning device and a chromatograph, the outer wall of the purification device is fixedly connected with a pipeline, the output end of the purification device is fixedly connected with the input end of the gas flow proportioning device through the pipeline, the inside of the pipeline comprises an air gas path, a hydrogen gas path and a nitrogen gas path, the nitrogen gas path is fixedly connected with the refrigeration device near the input end of the gas flow proportioning device, the output end of the gas flow proportioning device is fixedly connected with the input end of the chromatograph through the pipeline, the inside of the purification device comprises a dehydration pipeline and a deoxygenation dehydration pipeline, the number of the dehydration pipelines is two, the dehydration pipeline comprises a polytetrafluoroethylene hose, the inner wall of the dehydration pipeline is fixedly connected with a dehydration medium, the inside of the deoxygenation dehydration pipeline is provided with the same polytetrafluoroethylene hose, the inside of the deoxygenation dehydration pipeline is fixedly connected with a mixture of a dehydration medium and a deoxygenation medium, the outer wall of the air gas path is fixedly connected with the inner wall of the dehydration pipeline, the outer wall of the hydrogen gas path is fixedly connected with the same dehydration pipeline, and the outer wall of the nitrogen gas path is fixedly connected with the outer wall of the deoxygenation dehydration pipeline.

[0017] Preferably, the inside of the gas flow proportioning device is provided with high-precision gas flow proportioning valves, the number of the high-precision gas flow proportioning valves is three, and the outer walls of the air gas path, the hydrogen gas path and the nitrogen gas path are fixedly connected with the high-precision gas flow proportioning valves.

[0018] Preferably, the inside of the refrigeration device comprises a fixing frame, the bottom of the fixing frame is fixedly connected with the inner wall of the refrigeration device, the inner wall of the fixing frame is fixedly connected with the outer wall of a winding barrel, the inner wall of the fixing frame is fixedly connected with a refrigeration structure near the bottom of the winding barrel, the outer wall of the winding barrel is wound with a cooling pipeline, the inner wall of the winding barrel is fixedly connected with a heat exchange fin, the input end of the cooling pipeline is fixedly connected with the input end of the refrigeration device through the nitrogen gas path, and the output end of the cooling pipeline is fixedly connected with the output end of the refrigeration device through the nitrogen gas path.

[0019] Preferably, the nitrogen gas path is fixedly connected with a gas path switching valve near the output end of the purification device, the outer wall of the gas path switching valve is fixedly connected with a branch pipe, and the gas path switching valve is fixedly connected with the input end of the gas flow proportioning device through the branch pipe.

[0020] Preferably, the internal part of the chromatograph comprises gas chromatograph A, gas chromatograph B and gas chromatograph C, which are fixedly connected with the output end of the gas flow proportioning device through the arranged pipeline.

[0021] Preferably, the outer wall of the refrigeration device is fixedly connected with a temperature control switch.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] 1. By arranging the dehydration medium, deoxidizing medium and high-precision gas flow proportioning valve, the success rate of ignition is high, and the detection instrument is always in the best state of work. The air and hydrogen pass through the dehydration medium in the dehydration pipeline, and the nitrogen passes through the dehydration medium and deoxidizing medium in the dehydration pipeline for filtration to obtain high-quality gas source. At this time, the control gas path switching valve is arranged to make the nitrogen gas path directly communicate with the gas flow proportioning device. The high-quality gas source is treated by the high-precision gas flow proportioning valve in the gas flow proportioning device, and then flows into the hydrogen flame detector of the chromatograph at the best gas flow ratio, so that the success rate of ignition is high, and the service life of the device is long.

[0024] 2. By arranging the refrigeration structure, winding barrel and heat exchange fin, the cooling time of the instrument is reduced. After detection, the control gas path switching valve is arranged to make the nitrogen gas path communicate with the refrigeration device. The filtered nitrogen can pass through the refrigeration device. The refrigeration structure refrigerates to cool the heat exchange fin in the winding barrel, and the nitrogen in the cooling pipeline is heat-exchanged by the winding barrel to accelerate the refrigeration effect of the nitrogen, so that the cooling time of the instrument is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic view of the present application;

[0026] Figure 2 It is a structural sectional view of the purification device of the present application;

[0027] Figure 3 It is a structural schematic view of the refrigeration device of the present application;

[0028] Figure 4 It is a structural schematic view of the inner wall of the gas flow proportioning device of the present application.

[0029] In the figure: 1, purification device; 2, refrigeration device; 3, gas flow proportioning device; 4, pipeline; 5, chromatograph; 6, dehydration pipeline; 7, deoxygenation dehydration pipeline; 8, polytetrafluoroethylene hose; 9, dehydration medium; 10, deoxygenation medium; 11, fixing frame; 12, winding barrel; 13, cooling pipeline; 14, refrigeration structure; 15, high-precision gas flow proportioning valve; 16, temperature control switch; 17, gas chromatograph A; 18, gas chromatograph B; 19, gas chromatograph C; 20, air gas path; 21, hydrogen gas path; 22, nitrogen gas path; 23, gas path switching valve; 24, heat exchange sheet. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0031] Please refer to Figures 1-4 The present application provides a technical solution: a gas optimization treatment device for chromatographic test, comprising a purification device 1, a refrigeration device 2, a gas flow proportioning device 3 and a chromatograph 5, the outer wall of the purification device 1 is fixedly connected with a pipeline 4, the output end of the purification device 1 is fixedly connected with the input end of the gas flow proportioning device 3 through the pipeline 4, the inside of the pipeline 4 comprises an air gas path 20, a hydrogen gas path 21 and a nitrogen gas path 22, the nitrogen gas path 22 is fixedly connected with the refrigeration device 2 near the input end of the gas flow proportioning device 3, the output end of the gas flow proportioning device 3 is fixedly connected with the input end of the chromatograph 5 through the pipeline 4, the inside of the purification device 1 comprises a dehydration pipeline 6 and a deoxygenation dehydration pipeline 7, the number of the dehydration pipeline 6 is two, the dehydration pipeline 6 comprises a polytetrafluoroethylene hose 8, the inner wall of the dehydration pipeline 6 is fixedly connected with a dehydration medium 9, the inside of the deoxygenation dehydration pipeline 7 is provided with the same polytetrafluoroethylene hose 8, the inside of the deoxygenation dehydration pipeline 7 is fixedly connected with a mixture of the dehydration medium 9 and a deoxygenation medium 10, the outer wall of the air gas path 20 is fixedly connected with the inner wall of the dehydration pipeline 6, the outer wall of the hydrogen gas path 21 is fixedly connected with the same dehydration pipeline 6, and the outer wall of the nitrogen gas path 22 is fixedly connected with the outer wall of the deoxygenation dehydration pipeline 7.

[0032] In the present embodiment, the air, hydrogen and nitrogen are filtered by the dehydration medium 9 in the dehydration pipeline 6 and the dehydration medium 9 and the deoxygenation medium 10 in the deoxygenation dehydration pipeline 7, so that high-quality gas source is obtained, the high-quality gas source is processed by the high-precision gas flow proportioning valve 15 in the gas flow proportioning device 3, and then flows into the chromatograph hydrogen flame detector at the best gas flow ratio, so that the ignition success rate can be ensured and the detector is in the best working state.

[0033] Specifically, the internal part of the air flow proportioning device 3 is provided with high-precision air flow proportioning valves 15, the number of the high-precision air flow proportioning valves 15 is three, and the outer walls of the air gas path 20, the hydrogen gas path 21 and the nitrogen gas path 22 are all fixedly connected with the high-precision air flow proportioning valves 15.

[0034] In this embodiment, it is convenient to adjust the air flow ratio to the best point of instrument operation, the high-precision air flow proportioning valve 15 is a manual valve without display delay, and it has certain advantages over electronic equipment.

[0035] Specifically, the internal part of the refrigeration device 2 comprises a fixing frame 11, the bottom of the fixing frame 11 is fixedly connected with the inner wall of the refrigeration device 2, the inner wall of the fixing frame 11 is fixedly connected with the outer wall of a winding barrel 12, the inner wall of the fixing frame 11 is fixedly connected with a refrigeration structure 14 near the bottom of the winding barrel 12, the outer wall of the winding barrel 12 is wound with a cooling pipeline 13, the inner wall of the winding barrel 12 is fixedly connected with a heat exchange fin 24, the input end of the cooling pipeline 13 is fixedly connected with the input end of the refrigeration device 2 through the nitrogen gas path 22, and the output end of the cooling pipeline 13 is fixedly connected with the output end of the refrigeration device 2 through the nitrogen gas path 22.

[0036] In this embodiment, the filtered nitrogen gas can pass through the refrigeration device 2, the refrigeration structure 14 cools the heat exchange fin 24 inside the winding barrel 12, and the nitrogen gas inside the cooling pipeline 13 is heat-exchanged through the winding barrel 12, so as to accelerate the refrigeration effect of the nitrogen gas and reduce the cooling time of the instrument.

[0037] Specifically, the nitrogen gas path 22 is fixedly connected with a gas path switching valve 23 near the output end of the purification device 1, the outer wall of the gas path switching valve 23 is fixedly connected with a branch pipe, and the gas path switching valve 23 is fixedly connected with the input end of the air flow proportioning device 3 through the branch pipe.

[0038] In this embodiment, the ordinary line can be switched during the experiment, and the cooling line can be switched after the experiment, which is very convenient to use.

[0039] Specifically, the internal part of the chromatograph 5 comprises a gas chromatograph A 17, a gas chromatograph B 18 and a gas chromatograph C 19, and the gas chromatograph A 17, the gas chromatograph B 18 and the gas chromatograph C 19 are fixedly connected with the output end of the air flow proportioning device 3 through the pipeline 4.

[0040] In this embodiment, the accuracy of the device measurement is improved.

[0041] Specifically, the outer wall of the refrigeration device 2 is fixedly connected with a temperature control switch 16.

[0042] In this embodiment, the temperature can be controlled conveniently.

[0043] The working principle and use process of the present application: air, hydrogen and nitrogen are respectively connected into air gas path 20, hydrogen gas path 21 and nitrogen gas path 22, air and hydrogen pass through the dehydration medium 9 inside the dehydration pipeline 6, to prevent moisture from affecting the normal ignition of the hydrogen flame detector, nitrogen passes through the dehydration medium 9 and deoxidizing medium 10 inside the deoxidizing and dehydration pipeline 7 for filtration, to prevent flowing into the chromatograph, under the action of high temperature, to accelerate the aging of the chromatographic column, and to oxidize other metal elements, to obtain high-quality gas source, at this time, control the gas path switching valve 23 to make the nitrogen gas path 22 directly communicate with the gas flow proportioning device 3, the high-quality gas source is processed by the high-precision gas flow proportioning valve 15 inside the gas flow proportioning device 3, and then flows into the hydrogen flame detector of the chromatograph at the best gas flow ratio, which can ensure the ignition success rate and make the detector in the best working state, after detection, control the gas path switching valve 23 to make the nitrogen gas path 22 communicate with the refrigeration device 2, the filtered nitrogen can pass through the refrigeration device 2, the refrigeration structure 14 cools the heat exchange fin 24 inside the winding barrel 12, and the nitrogen inside the cooling pipeline 13 is heat-exchanged by the winding barrel 12, to accelerate the refrigeration effect of nitrogen and reduce the instrument cooling time.

[0044] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A gas optimization treatment device for chromatographic tests, comprising a purification device (1), a refrigeration device (2), a gas flow proportioning device (3) and a chromatograph (5), characterized in that: The outer wall of the purification device (1) is fixedly connected with a pipeline (4), the output end of the purification device (1) is fixedly connected with the input end of the airflow proportioning device (3) through the pipeline (4), the inside of the pipeline (4) comprises an air gas path (20), a hydrogen gas path (21) and a nitrogen gas path (22), the nitrogen gas path (22) is fixedly connected with a refrigeration device (2) near the input end of the airflow proportioning device (3), the output end of the airflow proportioning device (3) is fixedly connected with the input end of the chromatograph (5) through the pipeline (4), the inside of the purification device (1) comprises a dehydration pipeline (6) and a deoxygenation dehydration pipeline (7), the number of the dehydration pipeline (6) is two, the dehydration pipeline (6) comprises a polytetrafluoroethylene hose (8), the inner wall of the dehydration pipeline (6) is fixedly connected with a dehydration medium (9), the inside of the deoxygenation dehydration pipeline (7) is provided with the same polytetrafluoroethylene hose (8), the inside of the deoxygenation dehydration pipeline (7) is fixedly connected with a mixture of the dehydration medium (9) and a deoxygenation medium (10), the outer wall of the air gas path (20) is fixedly connected with the inner wall of the dehydration pipeline (6), the outer wall of the hydrogen gas path (21) is fixedly connected with the same dehydration pipeline (6), and the outer wall of the nitrogen gas path (22) is fixedly connected with the outer wall of the deoxygenation dehydration pipeline (7). The inside of the airflow proportioning device (3) is provided with high-precision airflow proportioning valves (15), the number of the high-precision airflow proportioning valves (15) is three, and the outer walls of the air gas path (20), the hydrogen gas path (21) and the nitrogen gas path (22) are all fixedly connected with the high-precision airflow proportioning valves (15). The nitrogen gas path (22) is fixedly connected with a gas path switching valve (23) near the output end of the purification device (1), the outer wall of the gas path switching valve (23) is fixedly connected with a branch pipe, and the gas path switching valve (23) is fixedly connected with the input end of the airflow proportioning device (3) through the branch pipe.

2. A gas optimization apparatus for chromatographic testing according to claim 1, characterized in that: The inside of the refrigeration device (2) comprises a fixing frame (11), the bottom of the fixing frame (11) is fixedly connected with the inner wall of the refrigeration device (2), the inner wall of the fixing frame (11) is fixedly connected with the outer wall of a winding barrel (12), the inner wall of the fixing frame (11) is fixedly connected with a refrigeration structure (14) near the bottom of the winding barrel (12), the outer wall of the winding barrel (12) is wound with a cooling pipeline (13), the inner wall of the winding barrel (12) is fixedly connected with a heat exchange fin (24), the input end of the cooling pipeline (13) is fixedly connected with the input end of the refrigeration device (2) through the nitrogen gas path (22), and the output end of the cooling pipeline (13) is fixedly connected with the output end of the refrigeration device (2) through the nitrogen gas path (22).

3. A gas optimization device for chromatographic testing according to claim 1, characterized in that: The inside of the chromatograph (5) comprises a gas chromatograph A (17), a gas chromatograph B (18) and a gas chromatograph C (19), and the gas chromatograph A (17), the gas chromatograph B (18) and the gas chromatograph C (19) are fixedly connected with the output end of the airflow proportioning device (3) through the pipeline (4).

4. A gas optimization device for chromatographic testing according to claim 1, characterized in that: The outer wall of the refrigeration device (2) is fixedly connected with a temperature control switch (16).

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