Analyzing device

Abstract

The utility model discloses an analysis device which comprises a sample gas inlet, a gas storage tank, a sucking pump, a gas analyzer and a gas outlet, an inlet of the gas storage tank is communicated with the sample gas inlet, and the gas storage tank is used for storing sample gas output by the sample gas inlet; one end of the sucking pump is communicated with an outlet of the gas storage tank; the inlet end of the gas analyzer is communicated with the other end of the sucking pump, and the gas analyzer is used for analyzing the sample gas output by the sucking pump; and the gas outlet is communicated with the outlet end of the gas analyzer. The problem that a small-gas-yield PEM water electrolysis hydrogen production test platform cannot directly measure gas components is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of PEM electrolytic cells, and in particular to an analytical device. Background Technology

[0002] PEM electrolyzers utilize an electrolytic membrane to decompose water into hydrogen and oxygen. Hydrogen is produced at the cathode and oxygen at the anode. The proton exchange membrane effectively isolates the oxygen and hydrogen, preventing cross-contamination. However, to ensure the safety of the electrolyzer, a hydrogen-oxygen analyzer is typically installed on the cathode line and an oxygen-hydrogen analyzer on the anode line. Existing analyzers usually require a certain volume of sample gas to pass through for accurate analysis. The low-volume PEM water electrolysis hydrogen production test platform's gas production is far from sufficient to directly supply the analyzers, making gas composition analysis on the test platform extremely difficult. Utility Model Content

[0003] Therefore, it is necessary to provide an analytical device that is applicable to a low-volume PEM electrolysis water production hydrogen test platform, thereby solving the problem that the low-volume PEM electrolysis water production hydrogen test platform cannot directly measure gas components.

[0004] An analytical apparatus, comprising:

[0005] Sample gas inlet;

[0006] A gas storage tank, the inlet of which is connected to the sample gas inlet, is used to store the sample gas output from the sample gas inlet;

[0007] A vacuum pump, one end of which is connected to the outlet of the gas storage tank;

[0008] A gas analyzer, wherein the inlet of the gas analyzer is connected to the other end of the gas pump, and the gas analyzer is used to analyze the sample gas output by the gas pump;

[0009] The gas outlet is connected to the outlet end of the gas analyzer.

[0010] Optionally, a drying unit may also be included, which is disposed between the sample gas inlet and the gas storage tank.

[0011] Optionally, the drying unit includes a gas-water separator and a gas dryer connected in series. The gas-water separator is connected to the sample gas inlet, and the gas dryer is connected to the inlet of the gas storage tank. The gas-water separator is used to separate water from the sample gas, and the gas dryer is used to dry the sample gas output by the gas-water separator.

[0012] Optionally, the drying unit further includes a drain pipe located at the bottom of the gas-liquid separator.

[0013] Optionally, a filter is also included, disposed between the gas dryer and the gas storage tank, the filter being used to filter the sample gas output from the gas dryer.

[0014] Optionally, it also includes a drain port located below the filter, and the drain port is connected to the air-water separator and the filter respectively.

[0015] Optionally, a short pipe is also included, which is connected in parallel with the gas storage tank. One end of the short pipe is located between the filter and the gas storage tank, and the other end of the short pipe is located between the gas storage tank and the vacuum pump.

[0016] Optionally, a pressure gauge may also be included, which is located at the outlet of the gas storage tank.

[0017] Optionally, it also includes a flow meter, one end of which is connected to the outlet of the air pump, and the other end of which is connected to the gas analyzer.

[0018] Optionally, the device also includes a three-way valve, through which the air pump and the flow meter are connected. The analysis device also includes a standard gas inlet, and the three-way valve is also connected to the standard gas inlet.

[0019] This application provides an analytical device that includes a gas storage tank and a pump after the sample gas inlet. The gas storage tank stores the sample gas produced by the small-volume PEM electrolysis water hydrogen production test platform. When the sample gas reaches a certain volume, it is then pumped into the gas analyzer, ensuring a stable supply of sample gas at a stable pressure and flow rate. This allows for accurate measurement of gas components and solves the problem that the small-volume PEM electrolysis water hydrogen production test platform cannot directly measure gas components. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the analysis device in one embodiment;

[0022] Figure 2This is a schematic diagram of the analysis device in another embodiment.

[0023] 1. Sample gas inlet; 2. Gas-liquid separator; 3. Gas dryer; 4. Filter; 5. Drain port; 6. Flexible connecting pipe; 7. Gas storage tank; 8. Short-circuit pipe; 9. Pressure gauge; 10. Vacuum pump; 11. Three-way valve; 12. Standard gas inlet; 13. Flow meter; 14. Gas analyzer; 15. Analyzer switch; 16. Analyzer wiring tray; 17. Gas outlet; 18. Gas circulation pipe; 19. Pressure reducing valve.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the term "and / or" throughout the text includes three solutions; taking A and / or B as an example, it includes technical solution A, technical solution B, and a technical solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] refer to Figure 1This application provides an analytical apparatus, which includes a sample gas inlet 1, a gas storage tank 7, a vacuum pump 10, a gas analyzer 14, and a gas outlet 17. The inlet of the gas storage tank 7 is connected to the sample gas inlet 1, and the gas storage tank 7 is used to store the sample gas output from the sample gas inlet 1. One end of the vacuum pump 10 is connected to the outlet of the gas storage tank 7. The inlet of the gas analyzer 14 is connected to the other end of the vacuum pump 10, and the gas analyzer 14 is used to analyze the sample gas output from the vacuum pump 10. The gas outlet 17 is connected to the outlet of the gas analyzer 14.

[0029] This application provides an analytical device, which includes a gas storage tank 7 and a vacuum pump 10 after the sample gas inlet 1. The gas storage tank 7 stores the sample gas produced by the small-volume PEM electrolysis water hydrogen production test platform. When the sample gas reaches a certain volume, it is then pumped into the gas analyzer 14 by the vacuum pump 10, so that the gas analyzer 14 can obtain a stable supply of sample gas with stable pressure and flow rate, thereby accurately measuring the gas components and solving the problem that the small-volume PEM electrolysis water hydrogen production test platform cannot directly measure the gas components.

[0030] Specifically, the gas analyzer 14 of this application can be a standalone oxygen-to-hydrogen analyzer, a standalone hydrogen-to-oxygen analyzer, or an analytical device that integrates both oxygen-to-hydrogen and hydrogen-to-oxygen analyzers. The analytical device can be integrated into a closed explosion-proof enclosure or onto an open panel. When integrated into a closed explosion-proof enclosure, explosion-proof lighting fixtures should be installed inside the enclosure. When the gas analyzer 14 is a hydrogen-to-oxygen analyzer, the sample gas inlet 1 is connected to the cathode pipeline of the electrolysis system; when the gas analyzer 14 is an oxygen-to-hydrogen analyzer, the sample gas inlet 1 is connected to the anode pipeline of the electrolysis system.

[0031] Specifically, the gas storage tank 7 can be a standard gas sampling tank, with the volume determined based on the requirements of the gas analyzer 14; alternatively, a gas bag or a customized gas storage tank 7 can be used.

[0032] refer to Figure 1 The analytical apparatus of this application also includes a drying unit, which is disposed between the sample gas inlet 1 and the gas storage tank 7.

[0033] Specifically, the drying unit includes a gas-water separator 2 and a gas dryer 3 connected to each other. The gas-water separator 2 is connected to the sample gas inlet 1 through a valve, and the gas dryer 3 is connected to the inlet of the gas storage tank 7. The gas-water separator 2 is used to separate water from the sample gas, and the gas dryer 3 is used to dry the sample gas output by the gas-water separator 2. The drying unit also includes a drain pipe, which is located at the bottom of the gas-water separator 2. The drain pipe is used to supply the water separated by the gas-water separator 2 to flow out, and a valve is installed on the drain pipe.

[0034] Preferably, the gas-liquid separator 2 is a high-efficiency filter-type gas-liquid separator, with the material and processing technology selected based on the characteristics of hydrogen and oxygen. The gas dryer 3 uses transparent tubing and is internally installed with color-changing silica gel to promptly determine when the desiccant needs to be replaced. Its design facilitates easy disassembly and replacement of the dryer packing.

[0035] refer to Figure 1 The analysis device also includes a filter 4, which is located between the gas dryer 3 and the gas storage tank 7. The filter 4 is used to filter the sample gas output from the gas dryer 3.

[0036] Specifically, the analysis device also includes a flexible connecting pipe 6. The filter 4 is connected to the inlet of the gas storage tank 7 in sequence through a valve and the flexible connecting pipe 6. By providing a flexible connecting pipe 6 in front of the gas storage tank 7, it can adapt to storage equipment of different types and volumes.

[0037] The analyzer also has a drain port 5, which is located below the filter 4. The gas-water separator 2 is connected to the drain port 5 through a drain pipe, and the filter 4 is connected to the drain port 5 through a valve.

[0038] refer to Figure 1 The analysis device also includes a short-connection pipe 8, which is connected in parallel with the gas storage tank 7. One end of the short-connection pipe 8 is located between the filter 4 and the flexible connecting pipe 6, and the other end is located between the gas storage tank 7 and the vacuum pump 10. A valve is also installed on the short-connection pipe 8. By including the short-connection pipe 8, the sample gas output from the filter 4 can be directly delivered to the gas analyzer 14 via the vacuum pump 10 without passing through the gas storage tank 7, thus meeting the requirements of a high-volume water electrolysis hydrogen production test platform.

[0039] Specifically, a valve is installed before the flexible connecting pipe 6, and one end of the short pipe 8 is located between the filter and the valve.

[0040] refer to Figure 1 The analysis device also includes a pressure gauge 9, which is located at the outlet of the gas storage tank 7. The pressure gauge 9 is used to monitor the pressure inside the gas storage tank 7. In particular, for equipment using gas bags, the gas pressure should be closely monitored to prevent overpressure from causing damage to the gas bags.

[0041] refer to Figure 1 The analysis device also includes a flow meter 13 and a three-way valve 11. The first port of the three-way valve 11 is connected to the outlet of the air pump 10, the second port of the three-way valve 11 is connected to one end of the flow meter 13, and the other end of the flow meter 13 is connected to the inlet of the gas analyzer 14. The analysis device also has a standard gas inlet 12, and the third port of the three-way valve 11 is connected to the standard gas inlet 12.

[0042] Specifically, a valve is installed between the gas storage tank 7 and the air pump 10, and a pressure gauge 9 is installed between the valve and the gas storage tank 7. The pressure gauge 9 is also connected to the third interface of the three-way valve 11 through a pipeline, and a valve is installed in the pipeline between the pressure gauge 9 and the three-way valve 11.

[0043] Specifically, the drain port 5, standard gas inlet 12, and gas outlet 17 are all equipped with quick connectors to facilitate connection with external supporting facilities.

[0044] Specifically, the analysis device also includes a gas circulation pipe 18. The outlet of the gas analyzer 14 is connected to the inlet of the gas storage tank 7 via the gas circulation pipe 18. Furthermore, the other end of the gas circulation pipe 18 is located between the filter 4 and the flexible connecting pipe 6 to form a self-pressurized closed-loop circulation of the gas storage tank 7, the vacuum pump 10, the flow meter 13, the gas analyzer 14, and the gas storage tank 7. This allows the gas analyzer 14 to receive a stable supply of sample gas at a stable pressure and flow rate, solving the problem that gas components produced by small-volume gas production testing devices cannot directly enter the gas analyzer 14 for detection. A valve is installed on the gas circulation pipe 18.

[0045] Since the analytical device is a closed-loop system, the gas analyzer 14 configured in the device should be a non-consumable gas analyzer 14.

[0046] Furthermore, the outlet of the gas analyzer 14 is connected to the gas outlet 17 via another pipeline, and a valve is installed on the pipeline between the gas analyzer 14 and the gas outlet 17.

[0047] Specifically, the analytical apparatus of this application also includes an analyzer switch 15 and an analyzer wiring slot 16. The analyzer switch 15 is used to control the opening and closing of the gas analyzer 14, and the analyzer wiring slot 16 is used to realize the electrical connection of the gas analyzer 14.

[0048] The working process of the analytical apparatus in this application is as follows:

[0049] S1, Nitrogen purging

[0050] The nitrogen purging procedure is a preparatory procedure before formal use after the installation, cleaning, sealing test, and power-on test of this analytical device are completed. Nitrogen is generally supplied from a nitrogen cylinder. The nitrogen pressure is reduced to 10-20 kPaG and connected to sample gas inlet 1 via a hose. Then, the valve at sample gas inlet 1 is opened to allow nitrogen to pass sequentially through the gas-liquid separator 2, gas dryer 3, filter 4, flexible connecting pipe 6, gas storage tank 7, pressure gauge 9, vacuum pump 10, three-way valve 11, flow meter 13, gas analyzer 14, and gas outlet 17 for system purging. The purging flow rate is controlled by flow meter 13; do not exceed the flow meter's range. The purging time is 5-10 minutes. During the purging process, briefly open the valves below the gas-liquid separator 2, filter 4, and short connecting pipe 8 to allow the purging nitrogen to exit from the exhaust port 5 for 20-30 seconds.

[0051] S2, Analyzer Calibration

[0052] The analyzer calibration procedure is performed when the data from the gas analyzer 14 shows drift after a period of use. When drift is detected, the gas analyzer 14 is first purged with nitrogen according to the "nitrogen purging" procedure. Then, the standard gas cylinder is connected to the standard gas inlet 12 via a hose, and the three-way valve 11 is switched to allow the standard gas to enter the pipeline. The standard gas then passes sequentially through the flow meter 13, the gas analyzer 14, and the gas outlet 17 to complete the analyzer calibration. The standard gas flow rate is controlled by the flow meter 13.

[0053] S3. The analyzer is working normally.

[0054] After the analyzer is calibrated and purged with nitrogen, and the gas generating device has produced sample gas, the analyzer enters normal operation. First, confirm that the power supply and communication systems are intact; the vent 5 at the lower level of the device is connected to the emission system; the gas outlet 17 is connected to the venting system, and the venting pipe should preferably be an independent line; the standard gas inlet 12 is sealed with a plug. Next, connect the gas outlet 17 of the gas generating device to the sample gas inlet 1, and open the valve at the sample gas inlet 1 to allow the sample gas to pass sequentially through the gas-liquid separator 2, gas dryer 3, filter 4, flexible connecting pipe 6, gas storage tank 7, pressure gauge 9, vacuum pump 10, three-way valve 11, flow meter 13, gas analyzer 14, and gas outlet 17. Since the device initially contains nitrogen, sample gas is needed to replace the nitrogen. The replacement time depends on the gas generating capacity of the gas generating device and the capacity of the gas storage tank 7 within the device. After the replacement is complete, close the valve before gas outlet 17. The gas to be analyzed continues to enter the analyzer along the original path and accumulates in gas storage tank 7. At this time, observe pressure gauge 9 and simultaneously turn on analyzer switch 15. When the pressure gauge 9 reading reaches 20-30 kPa, close the valve at sample gas inlet 1, then turn on the vacuum pump 10 and open the valve on gas circulation pipe 18. The sample gas begins to circulate within the analyzer. Control the gas flow rate by adjusting the valve opening of flow meter 13. The flow rate should meet the requirements of gas analyzer 14. At this time, gas analyzer 14 can display the gas component values.

[0055] refer to Figure 2 When the gas production capacity of the gas generating equipment meets the requirements for direct access to analysis, this application also provides another embodiment. In this other embodiment, the difference from the above embodiment is that the gas storage tank 7 is omitted, and a pressure reducing valve 19 is installed between the sample gas inlet 1 and the gas-water separator 2. A plug is added to the pipeline before the pressure gauge 9. When the gas production pressure is high, the pressure reducing valve at the sample gas inlet 1 can meet the working pressure requirements of the gas analyzer 14. This embodiment is suitable for the gas component analysis needs of the high-pressure, high-flow-rate PEM water electrolysis hydrogen production test platform.

[0056] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. An analytical device, characterized by include: Sample gas inlet; A gas storage tank, the inlet of which is connected to the sample gas inlet, is used to store the sample gas output from the sample gas inlet; A vacuum pump, one end of which is connected to the outlet of the gas storage tank; A gas analyzer, wherein the inlet of the gas analyzer is connected to the other end of the gas pump, and the gas analyzer is used to analyze the sample gas output by the gas pump; The gas outlet is connected to the outlet end of the gas analyzer.

2. The analysis device of claim 1, wherein, It also includes a drying unit, which is disposed between the sample gas inlet and the gas storage tank.

3. The analysis device of claim 2, wherein, The drying unit includes a gas-water separator and a gas dryer connected in series. The gas-water separator is connected to the sample gas inlet, and the gas dryer is connected to the inlet of the gas storage tank. The gas-water separator is used to separate water from the sample gas, and the gas dryer is used to dry the sample gas output by the gas-water separator.

4. The analysis device of claim 3, wherein, The drying unit also includes a drain pipe, which is located at the bottom of the gas-water separator.

5. The analysis device of claim 3, wherein, It also includes a filter disposed between the gas dryer and the gas storage tank, the filter being used to filter the sample gas output from the gas dryer.

6. The analysis device of claim 5, wherein, It also includes a drain port, which is located below the filter and is connected to the air-water separator and the filter.

7. The analysis device of claim 5, wherein, It also includes a short pipe, which is connected in parallel with the gas storage tank. One end of the short pipe is located between the filter and the gas storage tank, and the other end of the short pipe is located between the gas storage tank and the vacuum pump.

8. The analysis device of claim 1, wherein, It also includes a pressure gauge, which is located at the outlet of the gas storage tank.

9. The analysis device of claim 1, wherein, It also includes a flow meter, one end of which is connected to the outlet of the air pump, and the other end of which is connected to the gas analyzer.

10. The analysis device of claim 9, wherein, It also includes a three-way valve, through which the air pump and the flow meter are connected. The analysis device also includes a standard gas inlet, and the three-way valve is also connected to the standard gas inlet.

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