Gas analysis system and hydrogen production system

Abstract

The utility model discloses a gas analysis system and hydrogen production system.The gas analysis system is applied to the hydrogen production system and comprises a sample inlet and a discharge outlet, a dewatering device and an analyzer are connected between the sample inlet and the discharge outlet through a pipeline, the sample inlet is connected with a sampling pump, and the sampling pump is connected with a gas inlet. A first regulating valve is arranged between the sample inlet and the dewatering device; and a check valve is arranged between the analyzer and the discharge outlet. The hydrogen production system comprises a plurality of gas analysis systems. The problems that monitoring is difficult in the existing hydrogen production process, and gas potential safety hazards in a hydrogen production system cannot be found in advance can be solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to PEM electrolytic water hydrogen production technical field, especially relates to a gas analysis system and hydrogen production system. BACKGROUND

[0002] In recent years, hydrogen energy technology as one of new energy members has been widely developed, and electrolytic water hydrogen production technology represented by PEM has significant advantages in safety, energy consumption and maintenance compared with traditional caustic soda electrolysis hydrogen production method.

[0003] Hydrogen is a colorless, odorless and flammable and explosive dangerous gas, and continuous monitoring of hydrogen, oxygen and hydrogen-oxygen mixture generated in the hydrogen production equipment process is an important link to realize safe hydrogen production and high-quality hydrogen production.

[0004] However, the existing monitoring device focuses on monitoring flame, temperature and gas leakage, and such monitoring method belongs to post-monitoring, that is, the instrument panel can be displayed only after the danger occurs, which has certain risk and cannot find the safety hazards of gas in advance. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a gas analysis system and hydrogen production system to solve the technical problems of monitoring difficulty and inability to find gas safety hazards in the hydrogen production system in advance.

[0006] The technical scheme adopted to solve the above technical problems is:

[0007] The utility model discloses a gas analysis system is applied to hydrogen production system, including the sample inlet and the discharge port, the pipeline connection has the water removal device and the analyzer between the sample inlet and the discharge port, the sample inlet is connected with the sampling pump, the first regulating valve is equipped between the sample inlet and the water removal device, the analyzer and the discharge port are equipped with check valve.

[0008] The utility model at least has the beneficial effects that the sample inlet is communicated in the hydrogen production system, and the sampling pump extracts the monitoring medium in the hydrogen production system. The first regulating valve is used for adjusting the flow of monitoring medium before entering the water removal device and the analyzer, so that the flow of monitoring medium is adjusted to the best flow required by the analyzer detection, and the detection accuracy is improved. The monitoring medium is dehydrated by the water removal device, and then enters the analyzer for concentration detection. The concentration of monitoring medium is used to deeply analyze the slight change of internal components of the hydrogen production system, find the safety hazards of monitoring medium in advance, perform relevant operation in advance, control the concentration of monitoring medium in the hydrogen production system, and avoid gas leakage, combustion and even explosion accidents.

[0009] As a further improvement of the above technical solution, when the sample inlet is communicated with a hydrogen water tank, the analyzer is a hydrogen analyzer.

[0010] And / or, when the sample inlet is communicated with a deionized water tank, the analyzer is a hydrogen analyzer or an oxygen analyzer.

[0011] As a further improvement of the above technical solution, a three-way joint is communicated between the first regulating valve and the water removal device, and a humidity analyzer is connected to another end of the three-way joint.

[0012] As a further improvement of the above technical solution, the water removal device comprises a gas-liquid separation tank, a vortex separator and a dryer, the top of the gas-liquid separation tank is communicated with the vortex separator, the top of the vortex separator is communicated with one end of the dryer, and the other end of the dryer is communicated with the analyzer.

[0013] As a further improvement of the above technical solution, a second regulating valve and a regulating pump are connected in parallel between the gas-liquid separation tank and the vortex separator.

[0014] As a further improvement of the above technical solution, the gas analysis system further comprises a calibration port for calibrating the analyzer, a three-way switch valve is arranged between the vortex separator and the dryer, and one end of the three-way switch valve is connected to the calibration port by a pipeline.

[0015] As a further improvement of the above technical solution, the gas analysis system comprises a pressure relief valve, which is communicated between the vortex separator and the dryer, and a pressure relief pipeline is communicated with the pressure relief valve, and the other end of the pressure relief pipeline is arranged between the analyzer and the check valve.

[0016] As a further improvement of the above technical solution, a first flow meter is arranged between the water removal device and the analyzer, and a second flow meter is arranged in the pressure relief pipeline.

[0017] As a further improvement of the above technical solution, the gas analysis system comprises a liquid discharge port, a first liquid discharger is communicated with the bottom of the gas-liquid separation tank, a second liquid discharger is communicated with the bottom of the vortex separator, and the first liquid discharger and the second liquid discharger are communicated with the liquid discharge port.

[0018] The utility model discloses a kind of hydrogen production systems, comprising multiple as any one of the above gas analysis systems.

[0019] The utility model at least has the beneficial effect that: the concentration of multiple monitoring media in hydrogen production system is detected by multiple gas analysis systems, which facilitates early detection of safety hazards of multiple monitoring media, early operation, and control of the concentration of monitoring media in the hydrogen production system. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described below in combination with the drawings and embodiments.

[0021] Figure 1 It is the structural schematic diagram of gas analysis system provided by the utility model embodiment.

[0022] Figure 2 It is the structural schematic diagram of gas analysis system provided by the utility model embodiment and is used for detecting hydrogen concentration.

[0023] The marks in the drawings are as follows:

[0024] 110, sample inlet; 120, first regulating valve; 130, discharge port; 140, check valve; 150, first flowmeter;

[0025] 210, gas-liquid separation tank; 220, vortex separator; 221, air inlet; 230, dryer;

[0026] 300, analyzer; 310, hydrogen analyzer;

[0027] 400, humidity meter;

[0028] 510, second regulating valve; 520, regulating pump;

[0029] 600, calibration port; 610, three-way switch valve; 620, calibration pipeline;

[0030] 700, pressure relief valve; 710, pressure relief pipeline; 720, second flowmeter;

[0031] 810, liquid discharge port; 820, first liquid discharger; 830, second liquid discharger; 840, on-off valve;

[0032] 900, hydrogen production system; 910, deionized water tank. DETAILED DESCRIPTION

[0033] This part will describe the specific embodiments of the utility model in detail, and the preferred embodiments of the utility model are shown in the drawings. The role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the utility model. But it cannot be understood as the limitation of the protection scope of the utility model.

[0034] In the description of the utility model, it needs to be understood that, if the word such as "several" is described, its meaning is one or more, the meaning of multiple is two and above, greater than, less than, exceed and the like are not included in the number, above, below, within and the like are included in the number.If the first, second, third is described, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0035] In the description of the utility model, if the word such as "several" is described, its meaning is one or more, the meaning of multiple is two and above, greater than, less than, exceed and the like are not included in the number, above, below, within and the like are included in the number.If the first, second, third is described, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0036] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model combined with the specific content of the technical scheme.

[0037] Referring to Figure 1 And Figure 2 , the following will give several embodiments of a gas analysis system and a hydrogen production system.

[0038] As Figure 1 And Figure 2 Indicated, the gas analysis system of the utility model embodiment includes sample inlet 110 and discharge port 130, water removal device and analyzer 300 are connected by pipeline between sample inlet 110 and discharge port 130.The end of water removal device away from analyzer 300 is communicated with sample inlet 110, the end of analyzer 300 away from water removal device is communicated with discharge port 130, so that the water in the monitoring medium is removed before being detected and analyzed.

[0039] It can be understood that, in the process of electrolytic water hydrogen production, the monitoring medium to be measured is saturated with liquid water, the humidity is very large, and even liquid water can be taken out, therefore, before being analyzed by analyzer 300, the monitoring medium needs to be treated to avoid that liquid water in the monitoring medium affects the detection of analyzer 300.

[0040] It can be understood that, sample inlet 110 is connected with a sampling pump for extracting monitoring medium.A first regulating valve 120 is arranged between sample inlet 110 and water removal device to adjust the flow of monitoring medium, so that the flow of monitoring medium is the best flow required by analyzer 300 for measurement, and the detection accuracy of analyzer 300 is improved, such as Figure 1 And Figure 2The analyzer 300 and the exhaust port 130 are provided with a check valve 140 to prevent air from flowing back to the gas analysis system through the exhaust port 130, causing hydrogen in the monitoring medium to mix with air to reach the explosive concentration range when encountering fire, as shown in Figure 1 and Figure 2 as shown.

[0041] In this way, in the hydrogen production system 900, the sample inlet 110 is connected to the hydrogen production system 900, the sampling pump extracts the monitoring medium in the hydrogen production system 900, the first regulating valve 120 adjusts the flow of the monitoring medium, and after removing the moisture in the monitoring medium by the water removal device, the concentration of the monitoring medium is detected by the analyzer 300 to deeply analyze the small changes of the internal components of the hydrogen production system 900, to find the safety hazards of the monitoring medium in advance, and to facilitate the relevant operations in advance, thereby controlling the concentration of the monitoring medium in the hydrogen production system 900.

[0042] It can be understood that the deionized water tank 910 in the hydrogen production system 900 is taken as an example. The sample inlet 110 is connected to the deionized water tank 910, and the monitoring medium is hydrogen. When the gas analysis system detects that the hydrogen content in the deionized water tank 910 is too high, the nitrogen supply to the water tank can be increased to curb the rising trend of the hydrogen content and reduce the hydrogen concentration in the deionized water tank 910.

[0043] In some embodiments, the sample inlet 110 is connected to a hydrogen water tank, and the analyzer 300 is a hydrogen analyzer 310.

[0044] It can be understood that the gas-liquid two-phase mixed medium flowing out of the hydrogen side of the stack flows into a hydrogen separator for gas-liquid two-phase flow separation. Hydrogen is discharged from the top of the hydrogen separator, and hydrogen-rich water discharged from the bottom of the hydrogen separator is transported into a hydrogen water tank. The gas phase space of the hydrogen water tank contains a large amount of hydrogen. The sample inlet 110 is connected to the top of the hydrogen water tank, the monitoring medium is hydrogen, and the hydrogen analyzer 310 monitors the concentration of hydrogen therein, which is of great significance to the safe production of the hydrogen production system 900.

[0045] In other embodiments, the sample inlet 110 is connected to a deionized water tank 910, and the analyzer 300 is a hydrogen analyzer 310 or an oxygen analyzer.

[0046] It can be understood that the deionized water tank 910 contains hydrogen-rich water from a hydrogen water tank and oxygen-rich water from an oxygen tank, which are respectively collected through respective pipelines into the deionized water tank 910. The gas phase space at the top of the deionized water tank 910 is a mixture of hydrogen, oxygen, and water vapor. Since the explosive range of hydrogen is 4%~97%, and there is a relatively abundant oxygen in the deionized water tank 910, the monitoring medium is hydrogen and oxygen, respectively. The hydrogen analyzer 310 monitors the hydrogen concentration in the gas phase space of the deionized water tank 910, and the oxygen analyzer detects the oxygen concentration in the gas phase space of the deionized water tank 910, which is of great importance to the safe production of the hydrogen production system 900.

[0047] It can be understood that, due to the different optimal flow conditions required for the hydrogen analyzer 310 and the oxygen analyzer, the top of the deionized water tank 910 is connected to two gas analysis systems, one of which is the hydrogen analyzer 310 for detecting the hydrogen concentration of the deionized water tank 910. The other is the oxygen analyzer for detecting the oxygen concentration of the deionized water tank 910.

[0048] In this embodiment, the hydrogen analyzer 310 is model XTC-601. The oxygen analyzer is model GPR-2500.

[0049] It can be understood that, between the first regulating valve 120 and the water removal device, a three-way joint is connected, and the other end of the three-way joint is connected with a humidity meter 400 for measuring the relative humidity of the gas phase space, as shown in Figure 1 Therefore, after the monitoring medium is adjusted by the first regulating valve 120, it flows to the humidity meter 400 and the water removal device through the three-way joint, so that the humidity meter 400 detects the relative humidity of the monitoring medium.

[0050] It can be understood that, when the sampling port 110 is connected to the hydrogen tank, the humidity meter 400 is used to detect the relative humidity of the gas phase space of the hydrogen tank.

[0051] It can be understood that, when the sampling port 110 is connected to the deionized water tank 910, the humidity meter 400 is used to detect the relative humidity of the gas phase space of the deionized water tank 910.

[0052] In some embodiments, since the deionized water tank 910 is connected to two gas analysis systems, both of which are provided with a three-way joint and a humidity meter 400, the relative humidity of the two deionized water tanks 910 is obtained, and the reliability of the humidity meter 400 is improved.

[0053] In this embodiment, when the sampling port 110 is connected to the deionized water tank 910, the three-way joint and the humidity meter 400 are only provided in the gas analysis system in which the analyzer 300 is the oxygen analyzer, i.e. the three-way joint and the humidity meter 400 are not provided in the gas analysis system in which the analyzer 300 is the hydrogen analyzer 310, as shown in Figure 2 .

[0054] In this embodiment, the water removal device includes a gas-liquid separation tank 210, a vortex separator 220, and a dryer 230, as shown in Figure 1 and Figure 2 .

[0055] It is understandable that the input end of the gas-liquid separator 210 is connected to the first regulating valve 120, that is, the other output end of the three-way connector is connected to the gas-liquid separator 210. The gas-liquid separator 210 performs preliminary screening to remove moisture from the monitoring medium. The screened-out moisture flows to the bottom of the gas-liquid separator 210, and the monitoring medium after removing some moisture remains at the top of the gas-liquid separator 210.

[0056] Understandably, the input end of the vortex separator 220 is connected to the top of the gas-liquid separator 210, allowing the monitoring medium located at the top of the gas-liquid separator 210 to enter the vortex separator 220. The vortex separator 220 is connected to an air inlet 221, which introduces water-free and oil-free compressed air for vortex cooling, causing the moisture-containing gaseous monitoring medium to condense into water upon cooling, thereby further separating the moisture in the monitoring medium. The separated liquid water flows to the bottom of the vortex separator 220, while the monitoring medium after moisture removal remains at the top of the vortex separator 220.

[0057] Furthermore, a switching valve 840 is provided between the vortex separator 220 and the air inlet 221 to control the entry of waterless and oil-free compressed air into the vortex separator 220, such as... Figure 1 and Figure 2 As shown.

[0058] It is understandable that one end of the dryer 230 is connected to the top of the vortex separator 220, and the other end is connected to the analyzer 300. The monitoring medium output from the top of the vortex separator 220 passes through the dryer 230, absorbs moisture through the dryer 230, and then flows to the analyzer 300, so as to avoid the moisture in the monitoring medium from affecting the accuracy of the analyzer 300 measurement.

[0059] With this setup, after multiple gas-liquid separation and drying processes, the monitoring medium remains dry and clean before entering the analyzer 300 for detection, thus improving the accuracy of the analyzer 300's detection.

[0060] It is understandable that an adjustment device is provided between the gas-liquid separator 210 and the vortex separator 220, which is used to adjust the flow rate of the monitoring medium between the gas-liquid separator 210 and the vortex separator 220.

[0061] In some embodiments, the regulating device is a second regulating valve 510, which regulates the flow rate of the monitoring medium supplied from the gas-liquid separator 210 to the vortex separator 220.

[0062] Understandably, as the gas-liquid separator 210 continuously separates the gas and liquid phases of the monitoring medium, the gas pressure inside the gas-liquid separator 210 increases, forcing the monitoring medium to be automatically transported to the vortex separator 220. However, this can easily lead to a slower flow rate of the monitoring medium flowing to the vortex separator 220.

[0063] In other embodiments, the regulating device is a regulating pump 520. The regulating pump 520 draws the monitoring medium from the gas-liquid separator 210 and uniformly delivers it to the vortex separator 220 at a certain flow rate, so as to facilitate the regulation and control of the flow rate of the monitoring medium and further achieve the optimal flow rate required for measurement by the analyzer 300.

[0064] In this embodiment, the regulating device includes a second regulating valve 510 and a regulating pump 520. The second regulating valve 510 and the regulating pump 520 are connected in parallel and in series between the gas-liquid separator 210 and the vortex separator 220, as shown below. Figure 1 and Figure 2 As shown.

[0065] With this configuration, when the gas-phase monitoring medium separated by the gas-liquid separator 210 is sufficient, the monitoring medium flows to the vortex separator 220 under its own pressure. At this time, the second regulating valve 510 opens and the regulating pump 520 closes, adjusting the flow rate of the monitoring medium through the second regulating valve 510. When the gas-phase monitoring medium separated by the gas-liquid separator 210 is insufficient, the regulating pump 520 opens and the second regulating valve 510 closes, adjusting the operating power of the regulating pump 520 to regulate the flow rate of the monitoring medium to the vortex separator 220.

[0066] It is understandable that both the first regulating valve 120 and the second regulating valve 510 are needle valves.

[0067] Understandably, the gas analysis system also includes a calibration port 600, such as... Figure 1 and Figure 2 As shown, calibration port 600 is used to calibrate analyzer 300, improving the measurement accuracy and reliability of analyzer 300. Specifically, calibration port 600 is located at one end of calibration pipe 620, and the other end of calibration pipe 620 is connected to a three-way switching valve 610. The three-way switching valve 610 is located between vortex separator 220 and dryer 230. The other input end of the three-way switching valve 610 is connected to the top of vortex separator 220, and the output end of the three-way switching valve 610 is connected to drying pipe.

[0068] With this setup, standard concentration gas can enter the analyzer 300 through calibration port 600, calibration pipeline 620 and three-way switching valve 610. The analyzer 300 is calibrated by calculating the difference between the detection result of the analyzer 300 and the standard concentration gas.

[0069] Understandably, the gas analysis system also includes a pressure relief valve 700, which connects the vortex separator 220 and the dryer 230. When the pressure relief valve 700 is open, it connects to a pressure relief pipe 710, the other end of which connects to the analyzer 300 and the check valve 140. Figure 1 and Figure 2As shown.

[0070] With this configuration, when the pipeline pressure is lower than the set pressure of the pressure relief valve 700, the pressure relief valve 700 is closed, and the vortex separator 220 and the three-way switching valve 610 are connected, allowing the gas phase monitoring medium to flow to the analyzer 300 for concentration analysis. When the pipeline pressure is higher than the set pressure of the pressure relief valve 700, the pressure relief valve 700 automatically opens, connecting the top of the vortex separator 220 to the pressure relief pipeline 710. The monitoring medium then passes through the pressure relief pipeline 710, the check valve 140, and the discharge port 130, exiting the gas analysis system and reducing the pipeline pressure.

[0071] In this embodiment, the pressure relief valve 700 is located between the vortex separator 220 and the three-way switching valve 610, such as... Figure 1 and Figure 2 As shown.

[0072] It is understandable that a first flow meter 150 is installed between the water removal device and the analyzer 300, that is, the first flow meter 150 is located between the drying tube and the analyzer 300. Figure 1 and Figure 2 As shown, it is used to detect the flow rate of the monitoring medium before it enters the analyzer 300, and to regulate the flow rate of the monitoring medium entering the analyzer 300 by adjusting the first regulating valve 120 and the second regulating valve 510 or the regulating pump 520.

[0073] It is understandable that the pressure relief pipe 710 is equipped with a second flow meter 720, such as Figure 1 and Figure 2 As shown, the flow rate of the monitoring medium flowing through the pressure relief pipe 710 is detected by the second flow meter 720, which facilitates the adjustment of the set pressure of the pressure relief valve 700.

[0074] In this embodiment, the gas analysis system further includes a drain port 810, a first drain device 820 connected to the bottom of the gas-liquid separator 210, and a second drain device 830 connected to the bottom of the vortex separator 220. The first drain device 820 and the second drain device 830 merge and connect to the drain port 810. Figure 1 and Figure 2 As shown. Specifically, the bottom of the airflow separator tank and the bottom of the vortex separator 220 are respectively connected to the drain branch pipes. The first drainer 820 and the second drainer 830 are respectively installed on the two drain branch pipes. The two drain branch pipes are connected to the drain main pipe through the T-joint. The other end of the drain main pipe is connected to the drain port 810.

[0075] Understandably, two switch valves 840 are installed on the drain branch pipe connected to the gas-liquid separator 210, and the first drain device 820 is located between the two switch valves 840 to control whether the liquid phase at the bottom of the gas-liquid separator 210 flows out. Figure 1 and Figure 2 Figure 1 Figure 2 As shown.

[0076] It is understandable that the first drain device 820 is an LC liquid flow controller. The second drain device 830 is an automatic drain device, which does not require manual switching and is intelligent and easy to use.

[0077] It is understandable that the on / off valve 840 is a ball valve.

[0078] The hydrogen production system 900 of this embodiment includes multiple gas analysis systems. Specifically, there are at least three gas analysis systems. One of these systems has an inlet 110 connected to a hydrogen water tank, and an analyzer 300, specifically a hydrogen analyzer 310, monitors the hydrogen concentration and humidity in the hydrogen water tank. The inlets 110 of the other two gas analysis systems are both connected to a deionized water tank 910, and the analyzers 300 are a hydrogen analyzer 310 and an oxygen analyzer, respectively, used to detect the humidity, hydrogen concentration, and oxygen concentration in the deionized water tank 910.

[0079] Understandably, the inlet 110 and outlet 130 are connected via 1 / 4-inch tubing using compression fittings. All tubing is made of 316L stainless steel.

[0080] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A gas analysis system, characterized in that, The device is used in a hydrogen production system and includes an inlet and an outlet. A water removal device and an analyzer are connected by a pipeline between the inlet and the outlet. A sampling pump is connected to the inlet. A first regulating valve is provided between the inlet and the water removal device. A check valve is provided between the analyzer and the outlet.

2. The gas analysis system according to claim 1, characterized in that, When the sample inlet is connected to a hydrogen water tank, the analyzer is a hydrogen analyzer; And / or, when the sample inlet is connected to a deionized water tank, the analyzer is a hydrogen analyzer or an oxygen analyzer.

3. The gas analysis system according to claim 1, characterized in that, A three-way connector is connected between the first regulating valve and the water removal device, and a humidity meter is connected to the other end of the three-way connector.

4. The gas analysis system according to claim 1, characterized in that, The dehydration device includes a gas-liquid separator, a vortex separator, and a dryer. The top of the gas-liquid separator is connected to the vortex separator, the top of the vortex separator is connected to one end of the dryer, and the other end of the dryer is connected to the analyzer.

5. The gas analysis system according to claim 4, characterized in that, A second regulating valve and a regulating pump are connected in parallel between the gas-liquid separator and the vortex separator.

6. The gas analysis system according to claim 4, characterized in that, It also includes a calibration port for calibrating the analyzer, and a three-way switching valve is provided between the vortex separator and the dryer, with one end of the three-way switching valve connected to the calibration port pipeline.

7. The gas analysis system according to claim 4, characterized in that, It includes a pressure relief valve, which is connected between the vortex separator and the dryer, and the pressure relief valve is connected to a pressure relief pipe, the other end of which is located between the analyzer and the check valve.

8. The gas analysis system according to claim 7, characterized in that, A first flow meter is provided between the water removal device and the analyzer, and a second flow meter is provided in the pressure relief pipe.

9. The gas analysis system according to claim 4, characterized in that, It includes a drain port, the bottom of the gas-liquid separator is connected to a first drain device, the bottom of the vortex separator is connected to a second drain device, and the first drain device and the second drain device are connected to the drain port.

10. A hydrogen production system, characterized in that, It includes multiple gas analysis systems as described in any one of claims 1 to 9.

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