High-pressure-resistant dissolved hydrogen analyzer and dissolved hydrogen concentration monitoring system

Abstract

The invention relates to the technical field of dissolved hydrogen concentration measurement, and provides a high-pressure-resistant dissolved hydrogen analyzer and a dissolved hydrogen concentration monitoring system.The high-pressure-resistant dissolved hydrogen analyzer comprises a high-pressure-resistant dissolved hydrogen sensor, a flow cell and a secondary instrument; the high-pressure-resistant dissolved hydrogen sensor is mounted in the flow cell, is connected with the secondary instrument through a signal transmission cable assembly, and is used for detecting a dissolved hydrogen concentration signal of a target solution in the flow cell under a high-pressure condition; the flow cell is used for placing the target solution and the high-pressure-resistant dissolved hydrogen sensor; and the secondary instrument is used for analyzing the dissolved hydrogen concentration signal so as to determine and display the dissolved hydrogen concentration value corresponding to the target solution. Through the technical scheme, the measurement precision of the dissolved hydrogen concentration is high, and the measurement error is not influenced by other gases.

Description

[Technical field]

[0001] The present invention relates to the technical field of dissolved hydrogen concentration measurement, and in particular to a high-pressure resistant dissolved hydrogen analyzer and a dissolved hydrogen concentration monitoring system. [Background technology]

[0002] Dissolved oxygen in the system loops of nuclear power plants is the main cause of equipment corrosion. Adding an appropriate amount of dissolved hydrogen to the system loops to reduce the dissolved oxygen content is the main way to prevent equipment corrosion. In order to reduce equipment corrosion and ensure the service life and operating efficiency of the equipment, the dissolved hydrogen in the system must be controlled within a reasonable range, which requires online monitoring of the dissolved hydrogen concentration in the system. The system loops of nuclear power plants have the characteristics of high pressure, wide range of dissolved hydrogen concentration, high precision in dissolved hydrogen concentration measurement, and the need for online continuous monitoring. Therefore, designing a dissolved hydrogen analyzer that can be used for online continuous monitoring of dissolved hydrogen concentration in the high-pressure loop system of nuclear power plants is an urgent problem to be solved. [Summary of the invention]

[0003] The embodiments of the present invention provide a high-pressure resistant dissolved hydrogen analyzer and a dissolved hydrogen concentration monitoring system, aiming to solve the technical problems existing in the related art such as the inability to accurately and continuously monitor the dissolved hydrogen concentration of the high-pressure loop system of a nuclear power plant online.

[0004] In a first aspect, an embodiment of the present invention provides a high-pressure resistant dissolved hydrogen analyzer, comprising:

[0005] High pressure resistant dissolved hydrogen sensors, flow cells and secondary instruments;

[0006] The high-pressure resistant dissolved hydrogen sensor is installed in the circulation cell and connected to the secondary instrument through a signal transmission cable assembly, and is used to detect the dissolved hydrogen concentration signal of the target solution in the circulation cell under high pressure conditions;

[0007] The circulation pool is used to place the target solution and the high-pressure resistant dissolved hydrogen sensor;

[0008] The secondary instrument is used to analyze the dissolved hydrogen concentration signal to determine and display the dissolved hydrogen concentration value corresponding to the target solution.

[0009] In one embodiment, optionally, the high pressure resistant dissolved hydrogen sensor comprises:

[0010] A first working electrode, a second working electrode, a counter electrode, a hydrogen permeable membrane and an electrolyte;

[0011] The dissolved hydrogen in the target solution passes through the hydrogen permeable membrane and undergoes an oxidation reaction on the surfaces of the first working electrode and the second working electrode to generate a current, wherein the current generated by the reaction is positively correlated with the concentration of dissolved hydrogen, and a reduction reaction occurs between the counter electrode and the electrolyte.

[0012] In one embodiment, optionally, the high-pressure resistant dissolved hydrogen sensor further comprises: a temperature measuring element;

[0013] The temperature measuring element is used to measure the temperature signal in the high-pressure resistant dissolved hydrogen sensor, so that the secondary instrument compensates the dissolved hydrogen concentration value according to the temperature signal.

[0014] In one embodiment, optionally, the secondary instrument includes: a power supply module, a measurement module and a main control module;

[0015] The power supply module is connected to the measuring module and the main control module, and is used to convert an external AC power supply into a DC power supply and supply power to the measuring module and the main control module;

[0016] The measuring module is used to process and analyze the dissolved hydrogen concentration signal and the temperature signal detected by the high-pressure resistant dissolved hydrogen sensor to calculate the dissolved hydrogen concentration value corresponding to the target solution;

[0017] The main control module is used to store and display the dissolved hydrogen concentration value.

[0018] In one embodiment, optionally, the measurement module includes: a conditioning circuit, a data acquisition circuit, a driving circuit, a microprocessor, a barometer, a communication circuit and a dissolved hydrogen concentration output circuit;

[0019] The conditioning circuit is connected to the high-voltage resistant dissolved hydrogen sensor and is used to process the dissolved hydrogen concentration signal to output a dissolved hydrogen concentration voltage signal to the data acquisition circuit;

[0020] The driving circuit is connected to the conditioning circuit, and is used to perform data conversion according to the received control DC, and output a driving current and an electrode driving voltage to the temperature sensor and the high-pressure dissolved hydrogen sensor, wherein the driving current performs a constant current drive on the temperature sensor, and the electrode driving voltage performs a DC drive on the high-pressure dissolved hydrogen sensor after voltage following, power amplification, and impedance conversion processing;

[0021] The data acquisition circuit is connected to the conditioning circuit and is used to collect data on the dissolved hydrogen concentration voltage signal and the temperature signal;

[0022] The atmospheric pressure gauge is used to collect the atmospheric pressure value of the environment in which the secondary instrument is located;

[0023] The microprocessor is connected to the data acquisition circuit, the driving circuit and the atmospheric pressure gauge, and is used to calculate the dissolved hydrogen concentration value corresponding to the target solution according to the atmospheric pressure value, the temperature signal and the dissolved hydrogen concentration voltage signal;

[0024] The communication circuit is connected to the microprocessor and the main control module, and is used to send the dissolved hydrogen concentration value corresponding to the target solution to the main control module;

[0025] The dissolved hydrogen concentration output circuit is connected to the microprocessor and is used to output a current signal representing the dissolved hydrogen value to an external device.

[0026] In one embodiment, optionally, the microprocessor is specifically used for:

[0027] Correcting the calibration curve according to the atmospheric pressure value, standard gas concentration and pressure to calculate the correction coefficient and residual current;

[0028] Calculate a corresponding temperature value according to the temperature signal;

[0029] Calculate the corresponding hydrogen partial pressure value according to the correction coefficient, the residual current, the temperature value and the dissolved hydrogen concentration voltage signal;

[0030] The dissolved hydrogen concentration value corresponding to the target solution is calculated according to the hydrogen partial pressure value.

[0031] In one embodiment, optionally, the high-pressure resistant dissolved hydrogen sensor adopts an electrochemical measurement principle of dual working electrodes.

[0032] In one embodiment, optionally, the circulation cell is made of high pressure resistant and corrosion resistant materials, and both the high pressure resistant dissolved hydrogen sensor and the circulation cell are made of radiation resistant materials.

[0033] In one embodiment, optionally, the secondary instrument is further used for:

[0034] When the dissolved hydrogen concentration value corresponding to the target solution is less than a first preset threshold value, or greater than a second preset threshold value, an alarm prompt is output, wherein the first preset threshold value is less than the second preset threshold value.

[0035] In a second aspect, an embodiment of the present invention provides a dissolved hydrogen concentration monitoring system, comprising the high-pressure resistant dissolved hydrogen analyzer described in any one of the embodiments of the first aspect.

[0036] The high-pressure resistant dissolved hydrogen analyzer in the present invention includes: a high-pressure resistant dissolved hydrogen sensor, a circulation cell and a secondary instrument; the high-pressure resistant dissolved hydrogen sensor is installed in the circulation cell and connected to the secondary instrument through a signal transmission cable assembly, and is used to detect the dissolved hydrogen concentration signal of the target solution in the circulation cell under high pressure conditions; the circulation cell is used to place the target solution and the high-pressure resistant dissolved hydrogen sensor; the secondary instrument is used to analyze the dissolved hydrogen concentration signal to determine and display the dissolved hydrogen concentration value corresponding to the target solution. In the present invention, the high-pressure resistant dissolved hydrogen analyzer is a water chemical meter that can be used for high-precision and continuous measurement of dissolved hydrogen concentration in high-pressure media. It has strong selectivity and high measurement accuracy when used, and the measurement error is not affected by other gases; the present invention can be used for high-pressure medium measurement, and there is no need to reduce the pressure of the medium when used; and continuous online measurement can be achieved, thereby meeting the needs of continuous measurement of dissolved hydrogen concentration in high-pressure circuits in nuclear power plants or other measurement scenarios.

Brief Description of the Drawings

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic structural diagram of a high pressure resistant dissolved hydrogen analyzer according to an embodiment of the present invention is shown;

[0039] Figure 2 A schematic diagram of the structure of a circulation pool according to an embodiment of the present invention is shown;

[0040] Figure 3 A schematic diagram of the circuit structure of a secondary instrument according to an embodiment of the present invention is shown;

[0041] Figure 4 A flow chart showing a processing procedure of a microprocessor in a secondary instrument according to an embodiment of the present invention is shown. [Specific implementation method]

[0042] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0045] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0046] See also Figure 1 , Figure 1 The structural schematic diagram of a high-pressure resistant dissolved hydrogen analyzer according to an embodiment of the present invention is shown. The high-pressure resistant dissolved hydrogen analyzer is used to solve the technical problems existing in the related art such as the inability to accurately and continuously monitor the dissolved hydrogen concentration of the high-pressure loop system of a nuclear power plant online.

[0047] like Figure 1 As shown, a high-pressure resistant dissolved hydrogen analyzer according to one embodiment of the present invention includes:

[0048] A high pressure resistant dissolved hydrogen sensor 3, a flow cell 2 and a secondary instrument 1;

[0049] The high-pressure resistant dissolved hydrogen sensor 3 is installed in the circulation cell 2 and connected to the secondary instrument 1 through a signal transmission cable assembly 4, and is used to detect the dissolved hydrogen concentration signal of the target solution in the circulation cell 2 under high pressure conditions;

[0050] In this embodiment, the high-pressure resistant dissolved hydrogen sensor can adopt the electrochemical measurement principle of dual working electrodes and a high-pressure resistant sealing structure, and can measure the dissolved hydrogen concentration under the condition of a maximum pressure of 15.5 MPa.

[0051] The signal transmission cable assembly connects the dissolved hydrogen sensor and the secondary instrument via a signal connector for data transmission; and the signal transmission cable can be up to 50 meters long, thereby realizing long-distance measurement.

[0052] The circulation pool 2 is used to place the target solution and the high-pressure resistant dissolved hydrogen sensor 3;

[0053] In this embodiment, the circulation cell adopts a high-pressure resistant structure, and a narrow gap is set between the circulation cell and the dissolved hydrogen to achieve a target solution volume of less than 10mL, and the target solution is updated quickly. Among them, the circulation cell body material is made of stainless steel, and radiation-resistant plastic gaskets and O-rings are used to seal the target solution inlet and outlet and the sensor and the circulation cell to achieve its high-pressure and radiation-resistant properties. At the same time, the circulation cell adopts an inlet and outlet structure design, which can simultaneously realize in-situ online measurement of static samples and flow samples, avoid the manual sampling process, simplify the operation process, and effectively reduce personnel radiation damage.

[0054] Figure 2 The schematic diagram of the flow cell structure according to an embodiment of the present invention is shown, the flow cell includes a sample outlet 21, an inlet 22, a flow cell body 23 and an O-ring 24. The sample volume after the sensor is installed in the flow cell is controlled within 10 mL. The O-ring is used to achieve sealing between the sensor and the flow cell.

[0055] Preferably, the circulation pool body is made of a material with strong corrosion resistance, such as stainless steel, nickel-based alloy, etc.

[0056] Preferably, the O-ring of the circulation pool is made of a material having good hydrogenation resistance, corrosion resistance, insulation and radiation resistance, such as fluororubber, ethylene propylene rubber, etc.

[0057] The secondary instrument 1 is used to analyze the dissolved hydrogen concentration signal to determine and display the dissolved hydrogen concentration value corresponding to the target solution.

[0058] Among them, the high-pressure resistant dissolved hydrogen sensor adopts the electrochemical principle of dual working electrodes and is installed in a circulation pool with a high-pressure resistant structure and the characteristics of small target solution volume and fast update. The secondary instrument provides drive for the dissolved hydrogen sensor through a signal transmission cable assembly with a maximum length of 50 meters.

[0059] The present invention performs online measurement of dissolved hydrogen concentration based on the electrochemical principle of dual working electrodes. The dissolved hydrogen sensor includes a working electrode 1, a working electrode 2, a counter electrode, a hydrogen permeable membrane, an electrolytic cell, an electrolyte, a shell, etc. The materials of the working electrodes are all precious metal materials. The dissolved hydrogen in the measured medium passes through the hydrogen permeable membrane and undergoes an oxidation reaction on the surfaces of the working electrode 1 and the working electrode 2①. The dissolved hydrogen concentration is proportional to the current formed by the reaction. The working electrode 2 is provided to eliminate external interference with the current of the working electrode 1, and the dissolved hydrogen concentration is calculated by measuring the current of the working electrode 1. The counter electrode is a silver-based material, and a reaction occurs simultaneously in the electrolyte②.

[0060] Working electrode: H2+2OH - -2e-=2H2O Reaction ①

[0061] Counter electrode: AgCl+e-=Ag+Cl- Reaction ②

[0062] Furthermore, the dissolved hydrogen sensor of the present invention further comprises a temperature measuring element, which is placed inside the housing, and its temperature sensing end is in contact with the sensor housing. When the present invention is applied, the temperature inside the electric dissolved hydrogen sensor is monitored by the temperature measuring element, so as to compensate for the dissolved hydrogen concentration. Since the signal generated by the present invention is related to the temperature, setting the temperature compensation can realize the accurate measurement of the dissolved hydrogen concentration at different temperatures, wherein the temperature compensation range is 0 to 55°C.

[0063] In this embodiment, the secondary instrument conditions and collects the current signal of the dissolved hydrogen sensor and the temperature signal of the temperature measuring element, and stores, displays and outputs the dissolved hydrogen concentration after calculating and analyzing the current signal and the temperature signal, thereby achieving wide range and high-precision measurement of dissolved hydrogen concentration under high pressure conditions.

[0064] The dissolved hydrogen sensor is arranged in harsh environments such as high pressure, high humidity, and radiation, and the secondary instrument is arranged in a normal atmospheric environment. It can realize online monitoring of the dissolved hydrogen concentration in the high-pressure or low-pressure circuits of nuclear power plants, thermal power plants and other industries, and display the dissolved hydrogen content in the circuit in real time, providing a basis for water quality control in the circuit.

[0065] like Figure 3 As shown, in one embodiment, optionally, the secondary instrument 1 includes: a power supply module 11, a measurement module 12 and a main control module 13;

[0066] The power supply module 11 is connected to the measuring module 12 and the main control module 13, and is used to convert an external AC power supply into a DC power supply and supply power to the measuring module and the main control module.

[0067] Among them, the power supply module 11 can be powered by an external 220V, 50Hz AC power supply, mainly including a filter and a linear power supply. The filter can use a double-section universal power supply filter, which is used to filter the power supply to prevent electromagnetic interference from affecting the measurement results. The linear power supply can use a dual-line linear power supply, which is used to convert 220V AC into low-ripple +24V DC to power the measurement module 12 and the main control module 13.

[0068] The measuring module 12 is used to process and analyze the dissolved hydrogen concentration signal and the temperature signal detected by the high-pressure resistant dissolved hydrogen sensor to calculate the dissolved hydrogen concentration value corresponding to the target solution.

[0069] In one embodiment, optionally, the measuring module 12 includes: a conditioning circuit, a data acquisition circuit, a driving circuit, a microprocessor, a barometer, a communication circuit and a dissolved hydrogen concentration output circuit;

[0070] The conditioning circuit is connected to the high-voltage resistant dissolved hydrogen sensor and is used to process the dissolved hydrogen concentration signal to output a dissolved hydrogen concentration voltage signal to the data acquisition circuit;

[0071] Among them, the conditioning circuit can use an operational amplifier, which receives the electrode driving voltage from the driving circuit, performs DC driving on the dissolved hydrogen sensor after voltage following, power amplification, and impedance transformation, and performs current-voltage conversion, filtering, voltage following, and impedance transformation on the dissolved hydrogen concentration signal detected by the dissolved hydrogen sensor, and then outputs two dissolved hydrogen concentration voltage signals to the data acquisition circuit.

[0072] The driving circuit is connected to the conditioning circuit, and is used to perform data conversion according to the received control DC, and output a driving current and an electrode driving voltage to the temperature sensor and the high-pressure dissolved hydrogen sensor, wherein the driving current performs a constant current drive on the temperature sensor, and the electrode driving voltage performs a DC drive on the high-pressure dissolved hydrogen sensor after voltage following, power amplification, and impedance conversion processing;

[0073] The driving circuit uses a high-precision, low-noise 24-bit analog-to-digital converter to output a 500μA temperature driving current, and a high-precision digital-to-analog converter to output a constant electrode driving voltage.

[0074] The data acquisition circuit is connected to the conditioning circuit and is used to collect data on the dissolved hydrogen concentration voltage signal and the temperature signal;

[0075] Among them, the data acquisition circuit can use a high-precision, low-noise 24-bit analog-to-digital converter to collect the two dissolved hydrogen concentration voltage signals output by the conditioning circuit, and use a high-precision, low-noise 24-bit analog-to-digital converter to collect the temperature voltage signal detected by the sensor.

[0076] The atmospheric pressure gauge is used to collect the atmospheric pressure value of the environment in which the secondary instrument is located;

[0077] The barometer can use the high-precision absolute pressure sensor BMP280 or a similar sensor to achieve real-time detection of the atmospheric pressure of the secondary instrument's environment.

[0078] The microprocessor is connected to the data acquisition circuit, the driving circuit and the atmospheric pressure gauge, and is used to calculate the dissolved hydrogen concentration value corresponding to the target solution according to the atmospheric pressure value, the temperature signal and the dissolved hydrogen concentration voltage signal;

[0079] Among them, the microprocessor can use an integrated chip to realize logic control such as drive output, data acquisition, communication transmission, etc., and filter and temperature compensate the collected data. The microprocessor software code can be jointly written in Verilog HDL and C language, and compiled and downloaded through the software.

[0080] The microprocessor can control the driving circuit of the measuring module to output a direct current voltage of -0.2 to -0.6 V, and provide a polarization voltage for the dissolved hydrogen sensor, so that the sensor works in an electrochemical measurement state.

[0081] The communication circuit is connected to the microprocessor and the main control module, and is used to send the dissolved hydrogen concentration value corresponding to the target solution to the main control module;

[0082] Among them, the communication circuit can use a low-power isolation transceiver, which is used to receive the control instructions sent by the main control module 13 and upload the calculation and analysis results of the measurement module.

[0083] The dissolved hydrogen concentration output circuit is connected to the microprocessor and is used to output a current signal representing the dissolved hydrogen value to an external device.

[0084] The dissolved hydrogen concentration output circuit can use a high-precision digital-to-analog converter to output a 4-20 mA current signal representing the dissolved hydrogen concentration to an external instrumentation and control system.

[0085] The main control module 13 is used to store and display the dissolved hydrogen concentration value.

[0086] The main control module 13 may be an industrial all-in-one machine BPT-10B-P28B, which integrates a processor, a memory, a display, and a communication interface. The processor may be an Intel Atom D2700; the display may be a 10.1-inch resistive touch screen; the memory may be a 128G solid-state hard disk; and the communication interface may include an RS-485 interface and a USB interface, respectively realizing data transmission between the measurement module and the outside.

[0087] Furthermore, the measurement module adopts a graded structure to condition the 1nA to 200μA wide range, micro-current signal generated by the dissolved hydrogen sensor.

[0088] Furthermore, the measurement module uses a high-precision 24-bit AD and a low-bias current operational amplifier to collect and process the measurement signal.

[0089] like Figure 4 As shown, in one embodiment, optionally, the microprocessor is specifically used for:

[0090] Correcting the calibration curve according to the atmospheric pressure value, standard gas concentration and pressure to calculate the correction coefficient and residual current;

[0091] Calculate a corresponding temperature value according to the temperature signal;

[0092] Calculate the corresponding hydrogen partial pressure value according to the correction coefficient, the residual current, the temperature value and the dissolved hydrogen concentration voltage signal;

[0093] The dissolved hydrogen concentration value corresponding to the target solution is calculated according to the hydrogen partial pressure value.

[0094] In this embodiment, the correction coefficient and the residual current can be calculated according to the atmospheric pressure value, and the dissolved hydrogen concentration can be calibrated in combination with the temperature value to obtain an accurate dissolved hydrogen concentration value. In this way, the automatic calibration function of the high-pressure resistant dissolved hydrogen analyzer is realized, and the personnel requirements during the calibration process are reduced.

[0095] In one embodiment, optionally, the high-pressure resistant dissolved hydrogen sensor adopts an electrochemical measurement principle of dual working electrodes.

[0096] In one embodiment, optionally, the circulation cell is made of high pressure resistant and corrosion resistant materials, and both the high pressure resistant dissolved hydrogen sensor and the circulation cell are made of radiation resistant materials.

[0097] In this embodiment, radiation-resistant materials are selected for the sensor and the circulation pool. The sensor and the circulation pool body can be made of stainless steel. Non-metallic materials such as PEEK and radiation-resistant fluororubber are selected as insulating and sealing materials to ensure the radiation resistance, high pressure resistance and corrosion resistance of the sensor and the circulation pool.

[0098] In one embodiment, optionally, the secondary instrument is further used for:

[0099] When the dissolved hydrogen concentration value corresponding to the target solution is less than a first preset threshold value, or greater than a second preset threshold value, an alarm prompt is output, wherein the first preset threshold value is less than the second preset threshold value.

[0100] Furthermore, the secondary instrument uses a touch screen to display temperature, atmospheric pressure, dissolved hydrogen concentration, dissolved hydrogen concentration curve, and alarm, and can also be used for human-computer interaction to facilitate personnel operation.

[0101] Among them, the screen of the secondary instrument can be a color touch screen for displaying dissolved hydrogen concentration, temperature, alarm, dissolved hydrogen concentration curve, etc.

[0102] In a second aspect, a dissolved hydrogen concentration monitoring system is provided, which is used for the high-pressure resistant dissolved hydrogen analyzer described in any one of the embodiments of the first aspect.

[0103] It should be noted that the circuit functions of the high-pressure resistant dissolved hydrogen analyzer provided in this embodiment are mainly realized through the circuit connection relationship between the various circuit modules, and do not rely on the program module in a certain circuit module. In addition, the various circuit modules in the high-pressure resistant dissolved hydrogen analyzer can be realized by analog circuits or digital circuits, and for circuit modules that can be implanted with program modules, the realization of their module functions can be realized by program modules provided by the prior art.

[0104] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0105] It should be understood that, although the terms first, second, etc. may be used to describe the setting units in the embodiments of the present invention, these setting units should not be limited to these terms. These terms are only used to distinguish the setting units from each other. For example, without departing from the scope of the embodiments of the present invention, the first setting unit may also be referred to as the second setting unit, and similarly, the second setting unit may also be referred to as the first setting unit.

[0106] The word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0107] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, systems and methods can be implemented in other ways. For example, the system embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of systems or units, which can be electrical, mechanical or other forms.

[0108] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0109] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A high pressure resistant dissolved hydrogen analyzer, characterized in that: include: High pressure resistant dissolved hydrogen sensors, flow cells and secondary instruments; The high-pressure resistant dissolved hydrogen sensor is installed in the circulation cell and connected to the secondary instrument through a signal transmission cable assembly, and is used to detect the dissolved hydrogen concentration signal of the target solution in the circulation cell under high pressure conditions; The circulation pool is used to place the target solution and the high-pressure resistant dissolved hydrogen sensor; The secondary instrument is used to analyze the dissolved hydrogen concentration signal to determine and display the dissolved hydrogen concentration value corresponding to the target solution.

2. The high pressure resistant dissolved hydrogen analyzer according to claim 1, characterized in that: The high pressure resistant dissolved hydrogen sensor comprises: A first working electrode, a second working electrode, a counter electrode, a hydrogen permeable membrane and an electrolyte; The dissolved hydrogen in the target solution passes through the hydrogen permeable membrane and undergoes an oxidation reaction on the surfaces of the first working electrode and the second working electrode to generate a current, wherein the current generated by the reaction is positively correlated with the concentration of dissolved hydrogen, and a reduction reaction occurs between the counter electrode and the electrolyte.

3. The high pressure resistant dissolved hydrogen analyzer according to claim 1, characterized in that: The high-pressure resistant dissolved hydrogen sensor further comprises: a temperature measuring element; The temperature measuring element is used to measure the temperature signal in the high-pressure resistant dissolved hydrogen sensor, so that the secondary instrument compensates the dissolved hydrogen concentration value according to the temperature signal.

4. The high pressure resistant dissolved hydrogen analyzer according to claim 3, characterized in that: The secondary instrument includes: a power module, a measurement module and a main control module; The power supply module is connected to the measuring module and the main control module, and is used to convert an external AC power supply into a DC power supply and supply power to the measuring module and the main control module; The measuring module is used to process and analyze the dissolved hydrogen concentration signal and the temperature signal detected by the high-pressure resistant dissolved hydrogen sensor to calculate the dissolved hydrogen concentration value corresponding to the target solution; The main control module is used to store and display the dissolved hydrogen concentration value.

5. The high pressure resistant dissolved hydrogen analyzer according to claim 4, characterized in that: The measuring module includes: a conditioning circuit, a data acquisition circuit, a driving circuit, a microprocessor, a barometer, a communication circuit and a dissolved hydrogen concentration output circuit; The conditioning circuit is connected to the high-voltage resistant dissolved hydrogen sensor and is used to process the dissolved hydrogen concentration signal to output a dissolved hydrogen concentration voltage signal to the data acquisition circuit; The driving circuit is connected to the conditioning circuit, and is used to perform data conversion according to the received control DC, and output a driving current and an electrode driving voltage to the temperature sensor and the high-pressure dissolved hydrogen sensor, wherein the driving current performs a constant current drive on the temperature sensor, and the electrode driving voltage performs a DC drive on the high-pressure dissolved hydrogen sensor after voltage following, power amplification, and impedance conversion processing; The data acquisition circuit is connected to the conditioning circuit and is used to collect data on the dissolved hydrogen concentration voltage signal and the temperature signal; The atmospheric pressure gauge is used to collect the atmospheric pressure value of the environment in which the secondary instrument is located; The microprocessor is connected to the data acquisition circuit, the driving circuit and the atmospheric pressure gauge, and is used to calculate the dissolved hydrogen concentration value corresponding to the target solution according to the atmospheric pressure value, the temperature signal and the dissolved hydrogen concentration voltage signal; The communication circuit is connected to the microprocessor and the main control module, and is used to send the dissolved hydrogen concentration value corresponding to the target solution to the main control module; The dissolved hydrogen concentration output circuit is connected to the microprocessor and is used to output a current signal representing the dissolved hydrogen value to an external device.

6. The high pressure resistant dissolved hydrogen analyzer according to claim 5, characterized in that: The microprocessor is specifically used for: Correcting the calibration curve according to the atmospheric pressure value, standard gas concentration and pressure to calculate the correction coefficient and residual current; Calculate a corresponding temperature value according to the temperature signal; Calculate the corresponding hydrogen partial pressure value according to the correction coefficient, the residual current, the temperature value and the dissolved hydrogen concentration voltage signal; The dissolved hydrogen concentration value corresponding to the target solution is calculated according to the hydrogen partial pressure value.

7. The high pressure resistant dissolved hydrogen analyzer according to claim 1, characterized in that: The high-pressure resistant dissolved hydrogen sensor adopts the electrochemical measurement principle of double working electrodes.

8. The high pressure resistant dissolved hydrogen analyzer according to claim 1, characterized in that: The circulation cell is made of high pressure resistant and corrosion resistant materials, and both the high pressure resistant dissolved hydrogen sensor and the circulation cell are made of radiation resistant materials.

9. The high pressure resistant dissolved hydrogen analyzer according to claim 1, characterized in that: The secondary instrument is also used for: When the dissolved hydrogen concentration value corresponding to the target solution is less than a first preset threshold value, or greater than a second preset threshold value, an alarm prompt is output, wherein the first preset threshold value is less than the second preset threshold value.

10. A dissolved hydrogen concentration monitoring system, characterized in that: include: A high pressure resistant dissolved hydrogen analyzer according to any one of claims 1 to 9.

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