Gas purity detection system

Abstract

The embodiment of the invention provides a gas purity detection system which comprises an oxygen detection module, a hydrogen detection module and a water dew detection module, the oxygen detection module comprises an oxygen detection branch and an oxygen emptying branch, the oxygen detection branch and the oxygen emptying branch are connected to a first node, and the water dew detection module is connected to a second node. An oxygen hydrogen content analyzer is arranged on the oxygen detection branch; the hydrogen detection module comprises a hydrogen detection branch and a hydrogen emptying branch, the hydrogen detection branch and the hydrogen emptying branch are connected to the second node, and an oxygen content analyzer in hydrogen is arranged on the hydrogen detection branch; the water dew detection module comprises a water dew detection branch and a water dew emptying branch, the water dew detection branch and the water dew emptying branch are connected to the third node, and a water dew analyzer is arranged on the water dew detection branch; and the hydrogen-in-oxygen content analyzer, the oxygen-in-hydrogen content analyzer and the water dew analyzer are respectively connected to the controller. According to the gas concentration detection scheme provided by the invention, the safety and the flexibility of gas concentration detection are improved.

Description

Technical Field

[0001] The present application relates to the technical field of gas detection, and in particular to a gas purity detection system. Background Art

[0002] A reversible fuel cell is a rechargeable energy storage battery that combines water electrolysis hydrogen production technology with hydrogen-oxygen fuel cell power generation technology, that is, the forward and reverse processes of 2H2O+electric energy→2H2+O2 can be cyclically carried out. The active substances of the hydrogen-oxygen fuel cell power generation system, pure hydrogen and pure oxygen, can be "regenerated" through water electrolysis hydrogen production technology, thereby playing a role in energy storage. Reversible fuel cells can achieve dual-mode operation in fuel cell mode and electrolysis mode, integrating the water electrolysis hydrogen production system and the fuel cell power generation system into a reversible battery system, simplifying the system structure of the energy storage device, improving the system reliability and system specific energy, and have broad development prospects.

[0003] In the process of water electrolysis, the concentration of hydrogen and oxygen produced needs to be detected in real time to ensure the safety and reliability of the system operation. However, the current hydrogen and oxygen concentration detection system only designs a gas detection pipeline, and the front-end gas to be tested is directly connected to the gas inlet of the gas detection pipeline. When the flow rate of the gas to be tested is too large, it will cause damage to the detection instrument and may also cause personal injury, that is, the safety is poor; and during the detection, real-time detection is required at the gas outlet end of the gas to be detected, and this method is not flexible in the detection object. Summary of the invention

[0004] The embodiment of the present application provides a gas purity detection system, which can improve the safety and flexibility during gas purity detection.

[0005] The present application provides a gas purity detection system, including:

[0006] An oxygen detection module, the oxygen detection module comprising an oxygen detection branch and an oxygen exhaust branch, the oxygen detection branch and the oxygen exhaust branch are connected to the first node, and an oxygen hydrogen content analyzer is provided on the oxygen detection branch;

[0007] A hydrogen detection module, the hydrogen detection module comprising a hydrogen detection branch and a hydrogen exhaust branch, the hydrogen detection branch and the hydrogen exhaust branch are connected to the second node, and an oxygen content analyzer in hydrogen is arranged on the hydrogen detection branch;

[0008] a dew detection module, the dew detection module comprising a dew detection branch and a dew drainage branch, the dew detection branch and the dew drainage branch are connected to a third node, and a dew analyzer is provided on the dew detection branch;

[0009] Wherein, the hydrogen content analyzer in oxygen, the oxygen content analyzer in hydrogen and the water dew analyzer are respectively connected to the controller.

[0010] Optionally, in some embodiments of the present application, a first gas flow meter is provided on the oxygen exhaust branch, and the first gas flow meter is used to adjust the oxygen flow entering the oxygen detection branch.

[0011] Optionally, in some embodiments of the present application, the oxygen detection branch is also provided with a first stop valve, a first drying tube, a first filter, a second gas flow meter, a first one-way valve and a second stop valve in sequence, and the hydrogen content analyzer in oxygen is arranged between the second gas flow meter and the first one-way valve.

[0012] Optionally, in some embodiments of the present application, a third gas flow meter is provided on the hydrogen exhaust branch, and the third gas flow meter is used to adjust the flow of hydrogen entering the hydrogen exhaust branch.

[0013] Optionally, in some embodiments of the present application, the hydrogen detection branch is also provided with a first pressure reducing valve, a second drying tube, a third stop valve, a second filter, a fourth gas flow meter, a second one-way valve and a fourth stop valve in sequence, and the hydrogen oxygen content analyzer is arranged between the fourth gas flow meter and the second one-way valve.

[0014] Optionally, in some embodiments of the present application, a color-changing silica gel desiccant is arranged in the second drying tube, and the second filter is used to filter out tiny particles in the hydrogen flowing through the hydrogen detection branch, and the second filter is also used to filter out dust from the color-changing silica gel desiccant.

[0015] Optionally, in some embodiments of the present application, the water dew exhaust branch is provided with a fifth gas flow meter, and the fifth gas flow meter is used to adjust the flow of the mixed gas entering the water dew detection module.

[0016] Optionally, in some embodiments of the present application, the water dew detection branch is also provided with a second pressure reducing valve, a fifth stop valve, a sixth gas flow meter, a third one-way valve and a sixth stop valve in sequence, and the water dew analyzer is arranged between the sixth gas flow meter and the third one-way valve.

[0017] Optionally, in some embodiments of the present application, the oxygen exhaust branch is used to reduce the gas pressure of the oxygen detection branch when the gas pressure of the oxygen detection branch is greater than a first preset value; the hydrogen exhaust branch is used to reduce the gas pressure of the hydrogen detection branch when the gas pressure of the hydrogen detection branch is greater than a second preset value; the water dew exhaust branch is used to reduce the gas pressure of the water dew detection branch when the gas pressure of the water dew detection branch is greater than a third preset value.

[0018] Optionally, in some embodiments of the present application, the controller is further connected to a display module, and the display module is used to display the gas purity detection result of the gas purity detection system.

[0019] An embodiment of the present application provides a gas purity detection system, comprising an oxygen detection module, a hydrogen detection module and a water dew detection module, wherein the oxygen detection module comprises an oxygen detection branch and an oxygen exhaust branch, the oxygen detection branch and the oxygen exhaust branch are connected to a first node, and an oxygen detection branch is provided with an oxygen-hydrogen content analyzer; the hydrogen detection module comprises a hydrogen detection branch and a hydrogen exhaust branch, the hydrogen detection branch and the hydrogen exhaust branch are connected to a second node, and an oxygen-oxygen content analyzer is provided on the hydrogen detection branch; the water dew detection module comprises a water dew detection branch and a water dew exhaust branch, the water dew detection branch and the water dew exhaust branch are connected to a third node, and a water dew detection branch is provided with a water dew analyzer; the oxygen-hydrogen content analyzer, the hydrogen-oxygen content analyzer and the water dew analyzer are respectively connected to a controller. The gas concentration detection solution provided in the present application can reduce the pressure through the oxygen exhaust branch, the hydrogen exhaust branch and / or the water exhaust branch when the gas flow is too large, so as to avoid damage to the detection instrument due to excessive flow of the gas to be tested, thereby causing personal injury, thereby improving the safety of gas concentration detection. In addition, during detection, there is no need to perform real-time detection at the outlet end of the gas to be detected, thereby improving the flexibility of gas concentration detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 Schematic diagram of the structure of the gas purity detection system provided in the embodiment of the present application;

[0022] Figure 2 It is another structural schematic diagram of the gas purity detection system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0024] The present application provides a gas purity detection system. Figure 1 , Figure 1 The structural diagram of the gas purity detection system provided in the embodiment of the present application may be as follows:

[0025] The gas purity detection system includes an oxygen detection module 10, a hydrogen detection module 20 and a water dew detection module 30, wherein the oxygen detection module 10 includes an oxygen detection branch and an oxygen exhaust branch, the oxygen detection branch and the oxygen exhaust branch are connected to the first node a, and an oxygen-hydrogen content analyzer 101 is arranged on the oxygen detection branch; the hydrogen detection module 20 includes a hydrogen detection branch and a hydrogen exhaust branch, the hydrogen detection branch and the hydrogen exhaust branch are connected to the second node b, and an oxygen-oxygen content analyzer 201 is arranged on the hydrogen detection branch 20; the water dew detection module 30 includes a water dew detection branch and a water dew exhaust branch, the water dew detection branch and the water dew exhaust branch are connected to the third node c, and a water dew analyzer 301 is arranged on the water dew detection branch; the oxygen-hydrogen content analyzer 101, the hydrogen-oxygen content analyzer 201 and the water dew analyzer 301 are respectively connected to the controller 40.

[0026] The hydrogen content analyzer 101 in oxygen is an instrument for measuring the hydrogen content in oxygen. The hydrogen content analyzer 101 in oxygen is capable of detecting extremely low concentrations of hydrogen in oxygen, usually at the ppm (parts per million) level. It can respond quickly to changes in the hydrogen content in oxygen and provide real-time monitoring. In the gas purity detection system, the hydrogen content analyzer 101 in oxygen is installed on the oxygen detection branch to monitor the hydrogen content in oxygen. By connecting with the controller 40, the analyzer can be integrated into the entire gas purity detection system to achieve automated monitoring and control.

[0027] The hydrogen oxygen content analyzer 201 is an analytical instrument specially designed to measure the trace oxygen content in hydrogen. In a hydrogen system, even trace amounts of oxygen may pose a safety risk because a mixture of hydrogen and oxygen may cause an explosion under certain conditions. Therefore, the hydrogen oxygen content analyzer 201 plays a key role in ensuring the safety and reliability of the hydrogen system. The hydrogen oxygen content analyzer 201 is capable of detecting extremely low concentrations of oxygen in hydrogen, typically at the ppb (parts per billion) or ppm level. In the gas purity detection system, the hydrogen oxygen content analyzer 201 is installed on the hydrogen detection branch to monitor the oxygen content in hydrogen. By connecting to the controller 40, the analyzer can be integrated into the entire gas purity detection system to achieve automated monitoring and control.

[0028] In the embodiment of the present application, water dew is also called dew point. Dew point is a meteorological term, which refers to the temperature at which water vapor in the air reaches saturation and begins to condense into dew under a fixed air pressure. When the air is cooled to the dew point temperature, water vapor condenses into liquid water. In the gas purity detection system, the function of the water dew analyzer 301 is to measure the moisture content in the gas sample, usually expressed as the dew point temperature. The dew point temperature is the temperature at which water vapor in the gas begins to condense. This parameter is very important for controlling the humidity of the gas and preventing equipment corrosion or damage. By measuring the dew point, it can be ensured that the dryness of the gas meets the requirements of a specific application.

[0029] Optionally, in some embodiments of the present application, the oxygen exhaust branch is used to reduce the gas pressure of the oxygen detection branch when the gas pressure of the oxygen detection branch is greater than a first preset value; the hydrogen exhaust branch is used to reduce the gas pressure of the hydrogen detection branch when the gas pressure of the hydrogen detection branch is greater than a second preset value; the water dew exhaust branch is used to reduce the gas pressure of the water dew detection branch when the gas pressure of the water dew detection branch is greater than a third preset value.

[0030] When the gas pressure in the detection branch exceeds the preset value, the emptying branch adjusts and releases excess gas to reduce the pressure through components such as the fifth gas flowmeter 302 (oxygen emptying branch) and the third gas flowmeter 202 (hydrogen emptying branch). By alleviating excessive gas pressure, the emptying branch helps protect the detection equipment and the entire system from damage caused by excessive pressure. The emptying branch helps to maintain the stability of the gas pressure in the detection branch and ensure the accuracy and reliability of the detection process. When the gas pressure is too high, the emptying branch can respond quickly and reduce the pressure, thereby reducing the risk of explosion or other safety accidents. The emptying branch can be integrated with the controller 40 to achieve automated pressure monitoring and control and improve the intelligence level of the system.

[0031] Optionally, in some embodiments of the present application, please refer to Figure 2A first gas flow meter 102 is provided on the oxygen exhaust branch, and the first gas flow meter 102 is used to adjust the oxygen flow entering the oxygen detection branch. The first gas flow meter 102 is used to accurately control the flow of oxygen entering the oxygen detection branch to ensure that the oxygen flow is within the working range of the analyzer. By adjusting the flow, the analyzer can be prevented from being overloaded or damaged due to excessive flow, thereby protecting the analyzer. During the oxygen detection process, a stable oxygen flow helps to maintain the stability of the entire detection system and avoid measurement errors caused by flow fluctuations.

[0032] Optionally, in some embodiments of the present application, a first stop valve 103, a first drying tube 104, a first filter 105, a second gas flow meter 106, a first one-way valve 107 and a second stop valve 108 are sequentially arranged on the oxygen detection branch, and the hydrogen content analyzer 101 in oxygen is arranged between the second gas flow meter 106 and the first one-way valve 107.

[0033] The first stop valve 103 is used to control the opening and closing of the oxygen detection branch, so as to cut off the gas flow when necessary for maintenance or emergency shutdown. Specifically, when the system stops running, the first stop valve 103 can be closed to prevent gas from flowing back from the system, which may cause damage to the analyzer or other parts of the system. In an emergency, if an abnormal gas leak or system failure is detected, the first stop valve 103 can be quickly closed to cut off the gas supply to reduce the risk

[0034] The first drying tube 104 is used to remove moisture from oxygen, ensure that the gas entering the analyzer is dry, avoid the influence of moisture on the measurement results, and also protect subsequent equipment from moisture damage. Specifically, the first drying tube 104 is filled with a desiccant, such as silica gel, molecular sieve or other drying materials, which is used to absorb moisture from the oxygen passing through it. By reducing the moisture content in the gas, the first drying tube 104 helps prevent the formation of condensed water in the gas pipeline and detection equipment. The dry gas sample can protect the hydrogen content analyzer 101 in oxygen from moisture damage, because moisture may affect the performance and accuracy of the analyzer. Removing moisture can reduce errors in the measurement process and improve the measurement accuracy of the hydrogen content analyzer 101 in oxygen.

[0035] The first filter 105 is used to filter solid particles or impurities in oxygen, improve the cleanliness of the gas, and prevent these particles from damaging the analyzer or system. The first filter 105 can capture and remove solid particles in oxygen, which may come from the compression, storage or transmission process of the gas. By filtering out solid particles that may interfere with the operation of the analyzer, the first filter 105 helps to protect the hydrogen content analyzer 101 in oxygen and extend its service life.

[0036] The second gas flow meter 106 is used to further adjust and control the oxygen flow rate entering the oxygen hydrogen content analyzer 101 to ensure that the flow rate is stable to improve the accuracy and reliability of the measurement. : After the first gas flow meter 102 roughly adjusts the flow rate, the second gas flow meter 106 is used to more finely adjust the oxygen flow rate to meet the specific requirements of the analyzer 101. Ensuring that oxygen enters the analyzer at a stable and consistent flow rate is crucial to improving the accuracy and repeatability of the measurement results. By controlling the flow rate, damage to the oxygen hydrogen content analyzer 101 due to excessive or insufficient flow can be prevented.

[0037] The first check valve 107 is used to ensure that the gas can only flow in one direction, to prevent the gas or liquid from flowing back when the system stops working, and to protect the analyzer and the system from damage. The second stop valve 108 is another control point of the system, which can cut off the gas flow when necessary, or provide additional protection when the check valve 107 is damaged. The hydrogen content analyzer 101 in oxygen is installed between the second gas flowmeter 106 and the first check valve 107 to measure the hydrogen content in oxygen. This position ensures that the gas flow received by the analyzer is stable and has been dried and filtered, thereby improving the accuracy of the measurement.

[0038] Optionally, in some embodiments of the present application, a third gas flow meter 202 is provided on the hydrogen exhaust branch, and the third gas flow meter 202 is used to adjust the hydrogen flow entering the hydrogen exhaust branch.

[0039] In the hydrogen detection module 20, the third gas flow meter 202 is arranged on the hydrogen exhaust branch, and its main function is to adjust and control the flow of hydrogen during the exhaust process. As a part of the hydrogen detection module 20, the third gas flow meter 202 can be integrated with other components of the entire gas purity detection system (such as the controller 40) to realize automatic control.

[0040] Optionally, in some embodiments of the present application, a first pressure reducing valve 203, a second drying tube 204, a third stop valve 205, a second filter 206, a fourth gas flow meter 207, a second one-way valve 208 and a fourth stop valve 209 are sequentially arranged on the hydrogen detection branch, and the hydrogen oxygen content analyzer 201 is arranged between the fourth gas flow meter 207 and the second one-way valve 208.

[0041] The first pressure reducing valve 203 is used to reduce the high-pressure hydrogen to a pressure range suitable for the operation of the analyzer 201, ensuring the safety of the system and the accuracy of the analyzer. Specifically, the first pressure reducing valve 203 in the hydrogen detection branch is used to reduce the input pressure of hydrogen to a pressure range suitable for the operation of the detection equipment, preventing excessive pressure from causing damage to the hydrogen oxygen content analyzer 201 and other system components.

[0042] The second drying tube 204 is used to remove moisture from the hydrogen to prevent moisture from affecting the measurement results of the analyzer 201, and also to protect the system from corrosion caused by moisture. The third stop valve 205 is used to control the opening and closing of the hydrogen detection branch, so as to cut off the gas flow when necessary for maintenance or emergency shutdown. The third stop valve 205 can be completely closed or partially opened to control the flow of hydrogen into the hydrogen detection branch. When maintaining, repairing or calibrating the oxygen content analyzer 201 in hydrogen, the third stop valve 205 can be closed to isolate the analyzer and prevent gas from flowing in to ensure safety. When the system stops running, the third stop valve 205 can be closed to prevent gas from flowing back from the system, which may cause damage to the analyzer or other parts of the system. In an emergency, if an abnormal gas leak or system failure is detected, the third stop valve 205 can be quickly closed to cut off the gas supply to reduce risks.

[0043] The second filter 206 is used to filter solid particles or impurities in the hydrogen gas, thereby improving the cleanliness of the gas and preventing these particles from causing damage to the analyzer 201 or the system.

[0044] The fourth gas flowmeter 207 is used to adjust and control the hydrogen flow entering the hydrogen oxygen content analyzer 201 to ensure a stable flow to improve the accuracy and reliability of the measurement. After the first pressure reducing valve 203 reduces the hydrogen pressure, the fourth gas flowmeter 207 is used to finely adjust the hydrogen flow to ensure that the gas flow received by the analyzer 201 is within the optimal working range. By controlling the flow, damage to the hydrogen oxygen content analyzer 201 due to excessive or insufficient flow can be prevented, thereby protecting the analyzer. A stable hydrogen flow helps to improve the accuracy and repeatability of the hydrogen oxygen content analyzer 201 in measuring the oxygen content in hydrogen. During the hydrogen detection process, a stable hydrogen flow helps to maintain the stability of the entire detection system and avoid measurement errors caused by flow fluctuations. Accurate flow control helps to improve the accuracy of hydrogen detection data and provide a reliable basis for subsequent data analysis and decision-making.

[0045] The second one-way valve 208 ensures that hydrogen can only flow in one direction, preventing gas or liquid from flowing back when the system stops working, and protecting the hydrogen oxygen analyzer 201 and the system from damage. The fourth shut-off valve 209 serves as another control point of the system, which can cut off the gas flow when necessary or provide additional protection when the one-way valve 208 is damaged. The hydrogen oxygen content analyzer 201 is installed between the fourth gas flowmeter 207 and the second one-way valve 208 to measure the oxygen content in hydrogen. This position ensures that the gas flow received by the analyzer is stable and has been decompressed, dried and filtered, thereby improving the accuracy of the measurement.

[0046] Optionally, in some embodiments of the present application, a color-changing silica gel desiccant is provided in the second drying tube 204, and the second filter 206 is used to filter out tiny particles in the hydrogen flowing through the hydrogen detection branch, and the second filter is also used to filter out dust from the color-changing silica gel desiccant. The second drying tube 204 and the second filter 206 are provided to ensure the dryness and cleanliness of the hydrogen sample before entering the hydrogen oxygen content analyzer 201, thereby improving the accuracy of the measurement and the reliability of the system. The second drying tube 204 is equipped with a color-changing silica gel desiccant, which can effectively absorb moisture in the hydrogen, reduce the dew point of the gas, and ensure the dryness of the gas. The color-changing silica gel changes color after absorbing moisture, and this intuitive indication function enables the operator to clearly know when the desiccant reaches a saturated state and needs to be replaced. Since the color-changing silica gel desiccant may generate dust after absorbing moisture, the second filter 206 can capture the dust and prevent them from entering the hydrogen oxygen content analyzer 201.

[0047] It is understandable that a color-changing silica gel desiccant may also be disposed in the first drying tube 104, which will not be described in detail herein.

[0048] Optionally, in some embodiments of the present application, the water dew exhaust branch is provided with a fifth gas flow meter 302, and the fifth gas flow meter 302 is used to adjust the flow of the mixed gas entering the water dew detection module.

[0049] The fifth gas flowmeter 302 can accurately control the gas flow entering the water dew detection branch to meet the measurement requirements of the water dew analyzer 301. By adjusting the flow, damage to the water dew analyzer 301 due to excessive flow is avoided, ensuring the safe and accurate operation of the analyzer.

[0050] Optionally, in some embodiments of the present application, the water dew detection branch is also provided with a second pressure reducing valve 303, a fifth stop valve 304, a sixth gas flow meter 305, a third one-way valve 306 and a sixth stop valve 307 in sequence, and the water dew analyzer 301 is arranged between the sixth gas flow meter 305 and the third one-way valve 306.

[0051] The second pressure reducing valve 303 is used to reduce the high-pressure gas to a pressure range suitable for the operation of the water dew analyzer 301, ensuring the safety of the system and the accuracy of the analyzer. The fifth stop valve 304 is used to control the opening and closing of the water dew detection branch, so as to cut off the gas flow when necessary for maintenance or emergency shutdown. The sixth gas flow meter 305 is used to adjust and control the gas flow entering the water dew analyzer 301 to ensure the stability of the flow to improve the accuracy and reliability of the measurement. The third one-way valve 306 ensures that the gas can only flow in one direction to prevent the gas or liquid from flowing back when the system stops working, protecting the analyzer 301 and the system from damage. The sixth stop valve 307, as another control point of the system, can cut off the gas flow when necessary, or provide additional protection when the one-way valve 306 is damaged. The water dew analyzer 301 is installed between the sixth gas flow meter 305 and the third one-way valve 306 to measure the moisture content in the gas, that is, the dew point. This position ensures that the gas flow received by the analyzer is stable and has been processed by pressure reduction and flow regulation, thereby improving the accuracy of the measurement. It should be noted that the functions of each component are similar to the previous ones. Please refer to the previous embodiments for details and will not be described in detail here.

[0052] Optionally, in some embodiments of the present application, the controller 40 is also connected to a display module, which is used to display the gas purity detection results of the gas purity detection system. The display module can display the detection results of the hydrogen content analyzer 101 in oxygen, the oxygen content analyzer 201 in hydrogen, and the water dew analyzer 301 in real time, including key parameters such as gas purity and dew point. When the detected gas purity or dew point exceeds the preset safety or operating range, the display module can issue an alarm or notification to remind the operator to take corresponding measures. The display module may have a data recording function, which can store the detection data within a certain period of time, which is convenient for subsequent analysis and trend tracking. The display module can display the operating status of the entire gas purity detection system, including the working status of each valve, flow meter and analyzer.

[0053] In the gas concentration detection process, oxygen enters the oxygen detection branch from the gas source and first passes through the first stop valve 103. Then the gas flows through the first drying tube 104, where the color-changing silica gel desiccant removes moisture. Then, the gas passes through the first filter 105 to filter out solid particles and desiccant dust. After that, the gas enters the second gas flowmeter 106 to further adjust the flow rate. The gas then passes through the first one-way valve 107 to ensure one-way flow. After passing through the second stop valve 108, the gas enters the oxygen hydrogen content analyzer 101 to measure the hydrogen content in the oxygen. After the measurement is completed, the gas enters the oxygen emptying branch, adjusts the emptying flow through the first gas flowmeter 102, and finally discharges into the atmosphere. Hydrogen enters the hydrogen detection branch from the gas source and reduces the pressure through the first pressure reducing valve 203. The gas enters the second drying tube 204, where the color-changing silica gel desiccant removes moisture. Then, the gas passes through the second filter 206 to filter out solid particles and desiccant dust. Then, the gas enters the fourth gas flowmeter 207 to adjust the flow rate. The gas passes through the second one-way valve 208 to ensure one-way flow. After passing through the fourth stop valve 209, the gas enters the hydrogen oxygen content analyzer 201 to measure the oxygen content in the hydrogen. After the measurement is completed, the gas enters the hydrogen exhaust branch, adjusts the exhaust flow through the third gas flowmeter 202, and finally discharges into the atmosphere. The mixed gas enters the water dew detection branch from the gas source and reduces the pressure through the second pressure reducing valve 303. The gas is controlled to open and close through the fifth stop valve 304. Then, the gas enters the sixth gas flowmeter 305 to adjust the flow. The gas passes through the third one-way valve 306 to ensure one-way flow. After passing through the sixth stop valve 307, the gas enters the water dew analyzer 301 to measure the moisture content in the gas, that is, the dew point. After the measurement is completed, the gas enters the water dew exhaust branch, adjusts the exhaust flow through the fifth gas flowmeter 302, and finally discharges into the atmosphere. The controller 40 receives data from the hydrogen content analyzer 101 in oxygen, the oxygen content analyzer 201 in hydrogen, and the water dew analyzer 301. The controller 40 processes these data and displays the gas purity test results in real time through the display module. When the test results exceed the preset range, the display module issues an alarm or notification. When the gas pressure of the oxygen detection branch, the hydrogen detection branch or the water dew detection branch exceeds the preset value, the corresponding emptying branch (the first node a, the second node b or the third node c) is automatically adjusted through the gas flow meter (the first gas flow meter 102, the third gas flow meter 202, the fifth gas flow meter 302) to release excess gas and reduce pressure.

[0054] The embodiment of the present application provides a gas purity detection system, including an oxygen detection module 10, a hydrogen detection module 20 and a water dew detection module 30, wherein the oxygen detection module 10 includes an oxygen detection branch and an oxygen exhaust branch, the oxygen detection branch and the oxygen exhaust branch are connected to a first node a, and an oxygen-hydrogen content analyzer 101 is arranged on the oxygen detection branch; the hydrogen detection module 20 includes a hydrogen detection branch and a hydrogen exhaust branch, the hydrogen detection branch and the hydrogen exhaust branch are connected to a second node b, and an oxygen-hydrogen content analyzer 201 is arranged on the hydrogen detection branch; the water dew detection module 30 includes a water dew detection branch and a water dew exhaust branch, the water dew detection branch and the water dew exhaust branch The exhaust branch is connected to the third node c, and a water dew analyzer 301 is arranged on the water dew detection branch; the hydrogen content analyzer 101 in oxygen, the oxygen content analyzer 201 in hydrogen and the water dew analyzer 301 are respectively connected to the controller 40. The gas concentration detection scheme provided in the present application can reduce the pressure through the oxygen exhaust branch, the hydrogen exhaust branch and / or the water dew exhaust branch when the gas flow is too large, so as to avoid damage to the detection instrument due to excessive flow of the gas to be tested, thereby causing personal injury, thereby improving the safety of gas concentration detection. In addition, during detection, there is no need to perform real-time detection at the outlet end of the gas to be detected, thereby improving the flexibility of gas concentration detection.

[0055] The above is a detailed introduction to one embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A gas purity detection system, characterized in that: include: An oxygen detection module, the oxygen detection module comprising an oxygen detection branch and an oxygen exhaust branch, the oxygen detection branch and the oxygen exhaust branch are connected to the first node, and an oxygen hydrogen content analyzer is provided on the oxygen detection branch; A hydrogen detection module, the hydrogen detection module comprising a hydrogen detection branch and a hydrogen exhaust branch, the hydrogen detection branch and the hydrogen exhaust branch are connected to the second node, and an oxygen content analyzer in hydrogen is arranged on the hydrogen detection branch; a dew detection module, the dew detection module comprising a dew detection branch and a dew drainage branch, the dew detection branch and the dew drainage branch are connected to a third node, and a dew analyzer is provided on the dew detection branch; Wherein, the hydrogen content analyzer in oxygen, the oxygen content analyzer in hydrogen and the water dew analyzer are respectively connected to the controller.

2. The gas purity detection system according to claim 1, characterized in that: The oxygen exhaust branch is provided with a first gas flow meter, and the first gas flow meter is used to adjust the oxygen flow entering the oxygen detection branch.

3. The gas purity detection system according to claim 2, characterized in that: The oxygen detection branch is also provided with a first stop valve, a first drying tube, a first filter, a second gas flow meter, a first one-way valve and a second stop valve in sequence, and the hydrogen content analyzer in oxygen is arranged between the second gas flow meter and the first one-way valve.

4. The gas purity detection system according to claim 1, characterized in that: The hydrogen exhaust branch is provided with a third gas flow meter, and the third gas flow meter is used to adjust the flow of hydrogen entering the hydrogen exhaust branch.

5. The gas purity detection system according to claim 4, characterized in that: The hydrogen detection branch is also provided with a first pressure reducing valve, a second drying tube, a third stop valve, a second filter, a fourth gas flow meter, a second one-way valve and a fourth stop valve in sequence, and the oxygen content analyzer in hydrogen is arranged between the fourth gas flow meter and the second one-way valve.

6. The gas purity detection system according to claim 5, characterized in that: A color-changing silica gel desiccant is arranged in the second drying tube, and the second filter is used to filter out tiny particles in the hydrogen flowing through the hydrogen detection branch, and the second filter is also used to filter out dust from the color-changing silica gel desiccant.

7. The gas purity detection system according to claim 1, characterized in that: The dew exhaust branch is provided with a fifth gas flow meter, and the fifth gas flow meter is used to adjust the flow of the mixed gas entering the dew detection module.

8. The gas purity detection system according to claim 7, characterized in that: The dew detection branch is also provided with a second pressure reducing valve, a fifth stop valve, a sixth gas flow meter, a third one-way valve and a sixth stop valve in sequence, and the dew analyzer is arranged between the sixth gas flow meter and the third one-way valve.

9. The gas purity detection system according to any one of claims 1 to 8, characterized in that: The oxygen exhaust branch is used to reduce the gas pressure of the oxygen detection branch when the gas pressure of the oxygen detection branch is greater than a first preset value; the hydrogen exhaust branch is used to reduce the gas pressure of the hydrogen detection branch when the gas pressure of the hydrogen detection branch is greater than a second preset value; the water dew exhaust branch is used to reduce the gas pressure of the water dew detection branch when the gas pressure of the water dew detection branch is greater than a third preset value.

10. The gas purity detection system according to any one of claims 1 to 8, characterized in that: The controller is also connected to a display module, and the display module is used to display the gas purity detection result of the gas purity detection system.

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