Portable hydrogen conductivity measuring device and method based on electrodeionization

Abstract

The invention relates to a portable hydrogen conductivity measuring device based on electrodeionization. The portable hydrogen conductivity measuring device comprises a sampling detection subsystem, an electrodeionization subsystem, a measuring subsystem and a processor, the sampling detection subsystem is communicated with the electrodeionization subsystem and the measurement subsystem and is used for controlling the temperature, the pressure and the flow of sample water flowing into the electrodeionization system; the electrodeionization subsystem is communicated with the measurement subsystem and is used for removing cations in the sample water; the measurement subsystem is communicated with the electrodeionization system and is used for accurately measuring the conductivity, namely the hydrogen conductivity, of the sample water subjected to EDI treatment in real time; and the processor is used for providing a stable excitation signal for the conductivity electrode, acquiring an original resistance or conductivity signal and a temperature signal of the electrode, executing a temperature compensation algorithm to obtain a hydrogen conductivity value at 25 DEG C, outputting a final result to the display screen, and transmitting the final result to an external system. The invention also discloses a corresponding measurement method, electronic equipment and a computer readable storage medium.

Description

Technical Field

[0001] This invention relates to the field of water quality monitoring technology, and in particular to a portable hydrogen conductivity measuring device and method based on electrodeionization. Background Technology

[0002] In existing technologies, the monitoring of hydrogen conductivity in boiler steam systems in power, steel, and chemical industries involves passing the water sample through a hydrogen-form cation exchange resin, which removes hydrogen-containing compounds (such as Na+) from the sample. + NH 4+ Cation removal, etc., only targets anions (such as Cl-) remaining in the sample water. - SO4 2- PO4 3- The conductivity of anions is monitored, while hydrogen ions and hydroxide ions can be neutralized and consumed, and are not reflected in the conductivity. Therefore, the hydrogen conductivity characterizes the water purity or anion-induced corrosiveness of the boiler steam system.

[0003] Currently, hydrogen conductivity monitoring is primarily conducted via online single-meter measurements. If inaccurate data is detected on-site, operators must remove the sample water and measure it in a laboratory to accurately determine the problem. During this process, the sample water comes into contact with air, affecting the accuracy of the conductivity data and hindering effective instrument calibration. Furthermore, hydrogen conductivity monitoring typically involves passing the sample water through a cation exchange resin column to remove cations before measurement. After a period of operation, the resin in the cation exchange resin column becomes ineffective, requiring periodic replacement and regeneration. This regeneration process generates a large amount of acidic waste liquid and is cumbersome and labor-intensive. The regenerated resin must be rinsed with plenty of pure water before reuse; otherwise, residual acidic waste liquid will lead to overestimation of hydrogen conductivity, affecting normal operation. Summary of the Invention

[0004] The purpose of this invention is to provide a portable hydrogen conductivity measurement device and method based on electrodeionization, addressing the problems of low reliability of current online hydrogen conductivity measurement instruments and severe loss and regeneration pollution of cation exchange resins in my country. The portable hydrogen conductivity measurement device and method based on electrodeionization is rationally designed and has a simple structure. It can accurately measure the hydrogen conductivity of sample water. By comparing and analyzing the measurement results of the portable hydrogen conductivity meter and the on-site online hydrogen conductivity meter, the accuracy of the online hydrogen conductivity measurement is improved. The use of an electrodeionization module avoids the cumbersome steps of periodic acid washing and regeneration of cation exchange resins due to resin failure in traditional online hydrogen conductivity monitoring, and also avoids the generation of acid washing waste liquid during cation exchange resin regeneration. It can continuously provide cation-free sample water for hydrogen conductivity monitoring; the process of use and maintenance is simple and convenient.

[0005] This invention provides a portable hydrogen conductivity measuring device based on electrodeionization, comprising:

[0006] Sampling and detection subsystem, electro-deionization subsystem, measurement subsystem, and processor;

[0007] The sampling and detection subsystem is connected to the electro-deionization subsystem and the measurement subsystem, and is used to control the temperature, pressure and flow rate of the sample water flowing into the electro-deionization system;

[0008] The electro-deionization subsystem is connected to the measurement subsystem and is used to remove cations from the sample water;

[0009] The measurement subsystem is connected to the electrodeionization system and is used to accurately and in real time measure the conductivity of the sample water after EDI treatment, i.e., hydrogen conductivity.

[0010] The processor is used to provide a stable excitation signal for the conductivity electrode, acquire the electrode's original resistance or conductivity signal and temperature signal, execute a temperature compensation algorithm, calculate the hydrogen conductivity value at 25°C, output the final result to the display screen, and transmit it to an external system via a 4-20mA or digital interface.

[0011] Preferably, the sampling and detection subsystem includes: a sampling connector (1), a pressure control valve (2), a filter (3), a temperature sensor (4), a pressure sensor (5), an electric shut-off valve (6), and a flow sensor (7); wherein:

[0012] The inlet of the sampling connector (1) is connected to the sample water pipeline on site, and the outlet of the sampling connector (1) is connected to the inlet of the pressure control valve (2).

[0013] The pressure control valve (2) is used to control the sample water pressure and flow rate, discharge excess sample water to the outside of the system, and when the sample water pressure is too high, the pressure control valve (2) automatically closes the main outlet and opens all the bypass outlets; the outlet of the pressure control valve (2) is connected to the inlet of the filter (3);

[0014] The outlet of the filter (3) is connected to the inlet of the electric shut-off valve (6) via a measuring pipeline;

[0015] The temperature sensor (4) and pressure sensor (5) are both installed on the bypass of the measuring pipeline to monitor the temperature and pressure of the sample water and output data corresponding to the temperature and pressure to the processor.

[0016] The inlet of the flow sensor (7) is connected to the outlet of the electric shut-off valve (6), and the outlet of the flow sensor (7) is connected to the electro-deionization subsystem, for monitoring the flow rate of the sample water and outputting data corresponding to the flow rate to the processor;

[0017] The electric shut-off valve (6) will be automatically closed in the event of power failure or water failure, and is used to lock the sample water inside the electro-deionization subsystem. When the sample water temperature is detected to be too high, the electric shut-off valve will automatically shut off the power and disconnect the sample water from the system.

[0018] Preferably, the electrodeionization subsystem includes: a dilute chamber inlet (8), a dilute chamber outlet (9), a concentrate chamber inlet (12), a concentrate chamber outlet (13), and an electrodeionization module (14); wherein:

[0019] The dilute chamber inlet (8) is connected to the dilute chamber outlet (9) to form a dilute chamber for removing cations from the sample water;

[0020] The outlet (9) of the dilute chamber is connected to the inlet of the flow pool (11);

[0021] The concentration chamber inlet (12) is connected to the concentration chamber outlet (13) to form a concentration chamber;

[0022] The concentration chamber inlet (12) is connected to the outlet of the flow cell (11);

[0023] The electro-deionization module (14) is divided into a dilute chamber and a concentrated chamber, with the dilute chamber in the middle of the concentrated chamber. The dilute chamber and the concentrated chamber are separated by a cation exchange membrane on both sides. Both the dilute chamber and the concentrated chamber are filled with cation exchange resin. Positive and negative electrode plates are provided in the concentrated chamber on both sides.

[0024] Preferably, the electro-deionization module (14) has a "plate-frame" or "plate" structure, with a sandwich structure arrangement inside. The overall sequence is: positive electrode plate - cation exchange membrane - concentration chamber filled with ion exchange resin - cation exchange membrane - dilute chamber filled with ion exchange resin - cation exchange membrane - concentration chamber filled with ion exchange resin - cation exchange membrane - negative electrode plate; the cation exchange membrane is a selective cation exchange membrane (CEM), which allows cations to pass through but blocks anions and water molecules. The selective cation exchange membrane (CEM) is a perfluoropolymer of sulfonic acid group type or a styrene-divinylbenzene copolymer; the ion exchange resin is a strong acid type cation exchange resin with polystyrene matrix particles with sulfonic acid groups. In the dilute chamber, the resin adsorbs cations in the water through ion exchange. Under the action of a DC electric field, the adsorbed cations migrate towards the negative electrode and pass through the cation exchange membrane into the concentration chamber. At the same time, H2O generated by water ionization... +The resin can be continuously regenerated to maintain its H-type state, thus achieving continuous deep desalination. The positive electrode is an inert electrode coated with iridium or ruthenium rare metal oxides on a titanium base, and the negative electrode is made of 316 stainless steel or titanium. After being energized, an oxidation reaction occurs on the positive electrode and a reduction reaction occurs on the negative electrode. The dilute chamber inlet (8) and dilute chamber outlet (9) are standard interfaces on the module body and are connected to other parts of the device through pipelines. The dilute chamber inlet receives the sample water to be treated from the flow sensor (7), and the dilute chamber outlet delivers the deeply desalinated acidic sample water to the flow cell (11). The concentrate chamber inlet (12) and the concentrate chamber outlet (13) are standard pipeline interfaces. The concentrate chamber inlet (12) is used to receive a small stream of sample water after measurement, i.e., the flow cell outlet water. The flow cell outlet water serves as the carrier water for the concentrate chamber and is used to receive and discharge impurity ions that migrate from the dilute chamber from the system. The concentrate chamber outlet (13) discharges wastewater containing high concentrations of impurity ions from the device.

[0025] Preferably, the flow rate in the concentrate chamber is manually / automatically controlled by a flow-limiting orifice plate or needle valve, so that its flow rate is much lower than that in the dilute chamber, in order to form a concentrate with a high ion concentration.

[0026] Preferably, the measurement subsystem includes: a flow cell (11) and a conductivity electrode (10); wherein:

[0027] The conductivity electrode (10) is disposed in the flow cell (11) for real-time measurement of the hydrogen conductivity of the sample water.

[0028] Preferably, the flow cell (11) is made of polytetrafluoroethylene, polyetheretherketone, or polypropylene and is a streamlined flow cavity with no dead volume. The inlet and outlet of the flow cell (11) are connected to the pipeline system. The internal flow channel is designed as a straight-through type or with a guide groove to ensure that the sample water can respond quickly and without bubble retention when flowing through the conductivity electrode, thereby providing a stable and controllable measurement environment for the conductivity electrode. The conductivity electrode (10) is a two-electrode or four-electrode conductivity cell, and the electrode constant of the conductivity electrode (10) is K = 0.01 or 0.1 cm. -1 The contact portion of the electrode element is made of a corrosion-resistant material, namely platinum (Pt) black plated or 316 stainless steel. The conductivity electrode (10) has a built-in PT100 or PT1000 platinum resistance temperature sensor (RTD) for real-time measurement of sample water temperature and automatic temperature compensation (ATC). The conductivity electrode (10) is sealed and installed in the flow cell (11) through a standard 1 / 2-inch NPT or PG13.5 threaded interface. The conductivity electrode (10) and the temperature sensor (4) are connected to the processor via a cable.

[0029] A second aspect of the present invention provides a measurement method for a portable hydrogen conductivity measuring device based on electrodeionization, implemented based on the aforementioned portable hydrogen conductivity measuring device based on electrodeionization, comprising:

[0030] S1, the sampling connector (1) is connected to the on-site water sample pipeline;

[0031] S2, the device power switch is turned on, the electric shut-off valve (4) is powered on and opened, and the processor determines the operation of the electric shut-off valve (4), pressure control valve (2) and electro-deionization module (14) based on the analysis of the collected sample water temperature, sample water pressure and sample water flow data, including:

[0032] When the temperature of the sample water is too high, the electric shut-off valve (4) automatically shuts off and disconnects the sample water from the measuring device.

[0033] The pressure control valve (2) controls the size of the main and bypass openings to regulate pressure and flow. When the sample water pressure is too high, the pressure control valve (2) automatically closes the main opening and opens all the bypass openings.

[0034] When the sample water flow rate is too low, the power supply of the electro-deionization module (14) is automatically turned off.

[0035] S3, the sample water enters the dilute chamber of the deionization module (14) from the dilute chamber inlet (8) to carry out dynamic ion exchange and ion permeation to remove cations from the sample water;

[0036] S4, the cation-free sample water arrives at the flow cell (11) from the desalination chamber outlet (9), and the conductivity electrode (10) measures and collects the conductivity data of the sample water to complete the measurement of hydrogen conductivity;

[0037] S5, the sample water then enters the concentration chamber of the electro-deionization module (14) from the concentration chamber inlet (12) for electrolysis to generate H2O. + OH - H2, O2; among which, H + The cation exchange resin in the dilute chamber is reduced by ion dynamic exchange after permeating through the cation exchange membrane via electro-ion migration.

[0038] S6, the water sample contains H2, O2, and OH-. - Other ions are discharged from the concentrate chamber outlet (13).

[0039] A third aspect of the present invention provides an electronic device including a battery, a gas alarm, and a memory, wherein the memory stores a plurality of instructions, a processor is configured to read the instructions and execute the method as described in the second aspect, the battery is configured to power the device of the first aspect, the gas alarm is configured to monitor the concentration of hydrogen gas in the environment in which the device of the first aspect is used, and the feedback signal includes temperature, pressure, and flow signals respectively collected by a temperature sensor, a pressure sensor, and a flow sensor of the sampling and detection subsystem.

[0040] A fourth aspect of the present invention provides a computer-readable storage medium storing a plurality of instructions which can be read by a processor and executed as described in the second aspect.

[0041] The portable hydrogen conductivity measurement device and method based on electrodeionization of the present invention have the following beneficial effects:

[0042] The portable hydrogen conductivity measurement device based on electrodeionization combines a sophisticated electrodeionization module and a high-precision measurement system to achieve rapid, accurate, and online monitoring of anionic impurity content in sample water. Specifically:

[0043] (1) Power the device with a battery.

[0044] (2) By analyzing pipeline pressure and flow data, the pressure control valve is driven to adjust the main and bypass openings to regulate pressure and flow. When the water sample pressure is too high, the pressure control valve automatically closes the main opening and opens all the bypass openings.

[0045] (3) By analyzing temperature data, the electric shut-off valve is closed when the sample water is at high temperature to cut off the connection between the water sample and the system, so as to avoid the water sample damaging the device due to excessively high temperature.

[0046] (4) By analyzing the pipeline flow data, the power supply of the electro-deionization module is turned off when the flow is too low to prevent the module from burning out.

[0047] (5) The concentration of hydrogen gas in the environment in which the device is used is monitored in real time by a gas alarm to ensure the safe and reliable operation of the device. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1This is a schematic diagram of a portable hydrogen conductivity measuring device based on electrodeionization according to a preferred embodiment of the present invention.

[0050] Figure 2 This is a flowchart illustrating a portable hydrogen conductivity measurement method based on electrodeionization according to a preferred embodiment of the present invention.

[0051] Figure 3 This is a schematic diagram of an electronic device structure according to a preferred embodiment of the present invention. Detailed Implementation

[0052] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0055] Example 1

[0056] like Figure 1 As shown, this embodiment provides a portable hydrogen conductivity measuring device based on electrodeionization, comprising:

[0057] Sampling and detection subsystem, electro-deionization subsystem, measurement subsystem, and processor;

[0058] The sampling and detection subsystem is connected to the electro-deionization subsystem and the measurement subsystem, and is used to control the temperature, pressure and flow rate of the sample water flowing into the electro-deionization system;

[0059] The electro-deionization subsystem is connected to the measurement subsystem and is used to remove cations from the sample water;

[0060] The measurement subsystem is connected to the electrodeionization system and is used to accurately and in real time measure the conductivity of the sample water after EDI treatment, i.e., hydrogen conductivity.

[0061] The processor is used to provide a stable excitation signal for the conductivity electrode, acquire the electrode's original resistance (or conductivity) signal and temperature signal, execute a temperature compensation algorithm, calculate the hydrogen conductivity value at 25°C, output the final result to the display screen, and transmit it to an external system via a 4-20mA or digital interface (RS485 / Modbus).

[0062] In a preferred embodiment, the sampling and detection subsystem includes: a sampling connector (1), a pressure control valve (2), a filter (3), a temperature sensor (4), a pressure sensor (5), an electric shut-off valve (6), and a flow sensor (7); wherein:

[0063] The inlet of the sampling connector (1) is connected to the sample water pipeline on site, and the outlet of the sampling connector (1) is connected to the inlet of the pressure control valve (2).

[0064] The pressure control valve (2) is used to control the sample water pressure and flow rate, discharge excess sample water to the outside of the system, and when the sample water pressure is too high, the pressure control valve (2) automatically closes the main outlet and opens all the bypass outlets; the outlet of the pressure control valve (2) is connected to the inlet of the filter (3);

[0065] The outlet of the filter (3) is connected to the inlet of the electric shut-off valve (6) via a measuring pipeline;

[0066] The temperature sensor (4) and pressure sensor (5) are both installed on the bypass of the measuring pipeline to monitor the temperature and pressure of the sample water and output data corresponding to the temperature and pressure to the processor.

[0067] The inlet of the flow sensor (7) is connected to the outlet of the electric shut-off valve (6), and the outlet of the flow sensor (7) is connected to the electro-deionization subsystem, for monitoring the flow rate of the sample water and outputting data corresponding to the flow rate to the processor;

[0068] The electric shut-off valve (6) will be automatically closed in the event of power failure or water failure, and is used to lock the sample water inside the electro-deionization subsystem. When the sample water temperature is detected to be too high, the electric shut-off valve will automatically shut off the power and disconnect the sample water from the system.

[0069] In a preferred embodiment, the electrodeionization subsystem includes: a dilute chamber inlet (8), a dilute chamber outlet (9), a concentrate chamber inlet (12), a concentrate chamber outlet (13), and an electrodeionization module (14); wherein:

[0070] The dilute chamber inlet (8) is connected to the dilute chamber outlet (9) to form a dilute chamber for removing cations from the sample water;

[0071] The outlet (9) of the dilute chamber is connected to the inlet of the flow pool (11);

[0072] The concentration chamber inlet (12) is connected to the concentration chamber outlet (13) to form a concentration chamber;

[0073] The concentration chamber inlet (12) is connected to the outlet of the flow cell (11);

[0074] The electro-deionization module (14) is divided into a dilute chamber and a concentrated chamber, with the dilute chamber in the middle of the concentrated chamber. The dilute chamber and the concentrated chamber are separated by a cation exchange membrane on both sides. Both the dilute chamber and the concentrated chamber are filled with cation exchange resin. Positive and negative electrode plates are provided in the concentrated chamber on both sides.

[0075] In this embodiment, the technical details of the electro-deionization subsystem are as follows:

[0076] The electrodeionization (EDI) subsystem is the core of the entire device, and its function is to efficiently and continuously remove cations (such as Na+) from the sample water. + NH4 + Ca 2+ Mg 2+ (etc.), converting the sample water into an acidic solution, so that its hydrogen conductivity can accurately reflect strong anions (such as Cl-) in the water. - SO4 2- The concentration of ).

[0077] 1. Electrodeionization module 14

[0078] (1) Structure and working principle:

[0079] Basic configuration: The module adopts a typical "plate-frame" or "plate" structure, with its internal arrangement resembling a "sandwich". The overall sequence is: positive electrode plate - cation exchange membrane - concentration chamber (filled with ion exchange resin) - cation exchange membrane - dilute chamber (filled with resin) - cation exchange membrane - concentration chamber (filled with resin) - cation exchange membrane - negative electrode plate.

[0080] (A) Desalting Chamber: This is the core channel for sample water purification. The phrase "desalting chamber in the middle of the concentration chamber" indicates that the flow channel units are arranged symmetrically in a "concentration-desalting-concentration" pattern. A module can contain multiple such basic units to increase processing capacity.

[0081] (B) Cation exchange membrane:

[0082] Type: Selective cation exchange membrane (CEM). This membrane allows cations to pass through but blocks anions and water molecules.

[0083] Material: Typically a perfluoropolymer with sulfonic acid groups (such as Nafion). TM (Similar materials) or styrene-divinylbenzene copolymers, possessing excellent chemical stability and mechanical strength.

[0084] (C) Ion-Exchange Resin:

[0085] Type: Both the dilute and concentrated chambers are filled with strong acid cation exchange resin, usually polystyrene matrix particles with sulfonic acid groups (-SO3H).

[0086] Function: In the desalination chamber, the resin adsorbs cations (M...) from the water through ion exchange. + The reaction is: R-SO3H+M + →R-SO3M+H + Under the influence of a DC electric field, the adsorbed cations migrate towards the negative electrode and pass through the cation exchange membrane into the concentration chamber. Simultaneously, H+ ions generated by water ionization... + The resin can be continuously regenerated, keeping it in the H-type (R-SO3H) state, thus achieving continuous deep desalination.

[0087] (D) Electrode Plates:

[0088] Material: The positive electrode (Anode) plate is usually made of titanium (Ti) coated with rare metal oxides such as iridium (Ir) and ruthenium (Ru). The inert electrode (catheter) has good resistance to oxygen evolution (O2) corrosion. The cathode plate is usually made of 316 stainless steel or titanium.

[0089] Reaction: After energizing, an oxidation reaction occurs at the positive electrode (2H₂O→O₂↑+4H₂O). + +4e - A reduction reaction occurs at the negative electrode (2H₂O + 2e⁻). - →H2↑+2OH-). The H+ produced by the electrode reaction... + OH- is crucial for the regeneration of the system resin.

[0090] (2) Key parameters:

[0091] Operating voltage: Typically, a DC voltage of 50-300V is applied. Voltage optimization is required: too high a voltage will cause excessive water ionization, generating heat and accelerating electrode corrosion; too low a voltage will result in insufficient driving force and reduced deionization efficiency.

[0092] Operating current: typically in the range of tens to hundreds of milliamperes (mA), depending on the influent ion concentration and flow rate. The current is directly proportional to the amount of ions removed.

[0093] Resin filling amount: Determined by the volume of the dilute chamber flow channel, the filling rate is usually >90% to ensure good contact and exchange efficiency.

[0094] Module size (example): To ensure portability, the module may be designed to be compact, for example: 150mm long × 80mm wide × 40mm high.

[0095] 2. Dilute chamber inlet 8 and dilute chamber outlet 9

[0096] Structure: Typically, it uses a standard interface on the module body, such as a 1 / 4-inch or 1 / 8-inch connector. Parker or NPT external threaded connectors are used to connect to other parts of the system via piping.

[0097] Function: The desalination chamber inlet receives the sample water to be treated from flow sensor 7. The desalination chamber outlet receives the deeply desalinated water (cations are replaced by H+). + The acidic sample water (replaced) is transported to the flow cell 11 of the measurement subsystem.

[0098] parameter:

[0099] (1) Operating pressure: usually <0.5MPa, to avoid damage to the module and membrane;

[0100] (2) Design flow rate: Depending on the module capacity, the flow rate of the sample water in the desalination chamber is usually controlled in the lower range of 50-200 mL / min to ensure sufficient residence time for contact with the resin.

[0101] 3. Concentration chamber inlet 12 and concentration chamber outlet 13

[0102] Structure: Similar to the distillation chamber interface, it is a standard pipeline interface.

[0103] Function: The concentration chamber inlet receives a small stream of sample water from the post-measurement sample (i.e., the flow-through cell outlet water). This water serves as the "carrier water" for the concentration chamber, used to receive and remove impurity ions migrating from the dilute chamber from the system; the concentration chamber outlet discharges wastewater containing a high concentration of impurity ions from the system. This wastewater volume is very small (typically accounting for 5%-20% of the total influent), with the majority of the water (80%-95%) flowing out as purified water from the dilute chamber outlet.

[0104] Parameters: The flow rate in the concentrate chamber is usually controlled manually / automatically by a flow-limiting orifice plate or needle valve, making its flow rate much lower than that in the dilute chamber, for example, 5-20 mL / min, in order to form a concentrate with a high ion concentration, improve migration efficiency and prevent scaling.

[0105] In a preferred embodiment, the measurement subsystem includes: a flow cell (11) and a conductivity electrode (10); wherein:

[0106] The conductivity electrode (10) is disposed in the flow cell (11) for real-time measurement of the hydrogen conductivity of the sample water.

[0107] Technical details of the measurement subsystem in this embodiment:

[0108] 1. Flow cell 11

[0109] (1) Structure:

[0110] Material: Usually made of chemically inert and insulating materials, such as polytetrafluoroethylene (PTFE), polyetheretherketone (PEEK), or polypropylene (PP).

[0111] Design: Its structure is a small, streamlined flow chamber with no dead volume. The inlet and outlet connect to the piping system (usually 1 / 4-inch interfaces), and the internal flow channels are designed as straight-through or with guide channels to ensure a rapid response and no air bubble retention when the sample water flows through the conductivity electrode. The chamber volume is very small, typically <1 mL, to reduce measurement lag time.

[0112] (2) Function: To provide a stable and controllable measurement environment for conductivity electrodes.

[0113] 2. Conductivity electrode 10

[0114] (1) Structure and type:

[0115] Type: Employs a two-electrode or four-electrode conductivity cell. For portable devices and high-precision measurements, the four-electrode (or electromagnetic induction) type is a better choice because it effectively eliminates the effects of electrode polarization and cable resistance, resulting in higher measurement accuracy.

[0116] Electrode constant (K): This is a crucial parameter. For ultrapure water or acidic sample water with very low conductivity after EDI treatment (typically expected to be in the range of 0.055 μS / cm to 1 μS / cm), a conductivity cell with a smaller electrode constant should be selected, such as K = 0.01 or 0.1 cm. -1 To improve measurement sensitivity.

[0117] Electrode material: The contact parts of the electrode element are usually made of corrosion-resistant materials, such as platinum (Pt) black plating (increasing the effective surface area and reducing polarization effect) or 316 stainless steel (lower cost, suitable for a certain range).

[0118] Integrated Temperature Sensor: A high-quality conductivity electrode incorporates a PT100 or PT1000 platinum resistance temperature sensor (RTD) for real-time measurement of sample water temperature and automatic temperature compensation (ATC). The standard reporting temperature for hydrogen conductivity is 25°C; therefore, measurements must be compensated to values ​​at 25°C for comparability.

[0119] (2) Key parameters and measurement principle:

[0120] Measurement principle: The conductivity electrode calculates the conductivity (EC) by measuring the resistance (R) of the aqueous solution. The formula is: EC = K / R, where K is the electrode constant.

[0121] Measurement range: This electrode should be able to accurately measure the range from 0.05 μS / cm to 10 μS / cm.

[0122] Temperature compensation: A standard linear temperature compensation algorithm is used, and the formula is approximately:

[0123] EC 25 =EC t / [1+α(t-25)];

[0124] Among them, EC t It is the conductivity measured at temperature t, and α is the temperature coefficient (usually taken as 0.019~0.022 / ℃ for acidic solutions).

[0125] Installation: The electrode is sealed to the flow cell 11 via a standard 1 / 2-inch NPT or PG13.5 threaded interface, ensuring no leakage and that the electrode surface is fully immersed in the flowing sample water.

[0126] (3) System integration and data processing

[0127] Connection: The conductivity electrode 10 and the temperature sensor are connected to the processor (usually a built-in microcontroller MCU or a single-board computer) via a cable.

[0128] Example 2

[0129] like Figure 2 As shown, this embodiment provides a measurement method for a portable hydrogen conductivity measuring device based on electrodeionization, implemented using the aforementioned portable hydrogen conductivity measuring device based on electrodeionization, including:

[0130] S1, the sampling connector (1) is connected to the on-site water sample pipeline;

[0131] S2, the device power switch is turned on, the electric shut-off valve (4) is powered on and opened, and the processor determines the operation of the electric shut-off valve (4), pressure control valve (2) and electro-deionization module (14) based on the analysis of the collected sample water temperature, sample water pressure and sample water flow data, including:

[0132] When the temperature of the sample water is too high, the electric shut-off valve (4) automatically shuts off and disconnects the sample water from the measuring device.

[0133] The pressure control valve (2) controls the size of the main and bypass openings to regulate pressure and flow. When the sample water pressure is too high, the pressure control valve (2) automatically closes the main opening and opens all the bypass openings.

[0134] When the sample water flow rate is too low, the power supply of the electro-deionization module (14) is automatically turned off.

[0135] S3, the sample water enters the dilute chamber of the deionization module (14) from the dilute chamber inlet (8) to carry out dynamic ion exchange and ion permeation to remove cations from the sample water;

[0136] S4, the cation-free sample water arrives at the flow cell (11) from the desalination chamber outlet (9), and the conductivity electrode (10) measures and collects the conductivity data of the sample water to complete the measurement of hydrogen conductivity;

[0137] S5, the sample water then enters the concentration chamber of the electro-deionization module (14) from the concentration chamber inlet (12) for electrolysis to generate H2O. + OH - H2, O2; among which, H + The cation exchange resin in the dilute chamber is reduced by ion dynamic exchange after permeating through the cation exchange membrane via electro-ion migration.

[0138] S6, the water sample contains H2, O2, and OH-. - Other ions are discharged from the concentrate chamber outlet (13).

[0139] Example 3

[0140] like Figure 3As shown, this embodiment provides an electronic device, including a processor 306 and a memory 304, a driver 305, a battery 301, and a gas alarm 302 connected to the processor 306. The memory 305 stores multiple instructions, which can be loaded by the processor. The driver 304 executes and drives the pressure control valve 2, the electric shut-off valve 6, and the electro-deionization module 14, so that the processor 306 can perform the method as described in Embodiment 2. The battery 301 is used to power the device in Embodiment 1. The gas alarm 302 is used to monitor the hydrogen gas concentration in the environment in which the device in Embodiment 1 is used. The feedback signals include signals from the temperature sensor 4, the pressure sensor 5, and the flow sensor 7.

[0141] This embodiment also provides a computer-readable storage medium storing multiple instructions that can be read and executed by a processor to measure hydrogen conductivity.

[0142] Through the above description of the embodiments, those skilled in the art can clearly understand that the above embodiments can be implemented by software, or by using software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions of the above embodiments can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.), including several instructions to cause a computer device (such as a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0143] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A portable hydrogen conductivity measurement device based on electro- deionization, characterized in that, It comprises: a sampling and detecting subsystem, an electrodeionization subsystem, a measuring subsystem and a processor; the sampling and detecting subsystem is in communication with the electrodeionization subsystem and the measuring subsystem, and is used to control the temperature, pressure and flow of the sample water flowing into the electrodeionization system; the electrodeionization subsystem is in communication with the measuring subsystem, and is used to remove the cations in the sample water; the measuring subsystem is in communication with the electrodeionization system, and is used to accurately and real-timely measure the conductivity of the sample water after being treated by the electrodeionization system, i.e. the hydrogen conductivity; the processor is used to provide a stable excitation signal for the conductivity electrode, collect the original resistance or conductivity signal and temperature signal of the electrode, and execute a temperature compensation algorithm to obtain the hydrogen conductivity value at 25℃, output the final result to a display screen, and transmit the result to an external system.

2. The portable hydrogen conductivity measurement device based on electro- deionization according to claim 1, characterized in that, The sampling and detecting subsystem comprises a sampling joint (1), a pressure control valve (2), a filter (3), a temperature sensor (4), a pressure sensor (5), an electric shut-off valve (6) and a flow sensor (7); wherein: the inlet of the sampling joint (1) is in communication with the sample water pipeline in the field, and the outlet of the sampling joint (1) is connected with the inlet of the pressure control valve (2); the pressure control valve (2) is used to control the sample water pressure and flow, and discharge the excess sample water outside the system, and when the sample water pressure is too high, the pressure control valve (2) automatically closes the main path opening and opens all the bypass openings; the outlet of the pressure control valve (2) is connected with the inlet of the filter (3); the outlet of the filter (3) is connected with the inlet of the electric shut-off valve (6) through a measuring pipeline; the temperature sensor (4) and the pressure sensor (5) are both arranged on the bypass of the measuring pipeline, and are used to monitor the temperature and pressure of the sample water and output the data corresponding to the temperature and pressure to the processor; the inlet of the flow sensor (7) is connected with the outlet of the electric shut-off valve (6), and the outlet of the flow sensor (7) is connected with the electrodeionization subsystem, and is used to monitor the flow of the sample water and output the data corresponding to the flow to the processor; the electric shut-off valve (6) is automatically closed in the case of power failure or water failure, and is used to lock the sample water inside the electrodeionization subsystem, and when the sample water temperature is detected to be too high, the electric shut-off valve is automatically powered off and closed to cut off the connection between the sample water and the system.

3. The portable hydrogen conductivity measurement device based on electro- deionization according to claim 2, characterized in that, The electrodeionization subsystem comprises a dilute chamber inlet (8), a dilute chamber outlet (9), a concentrated chamber inlet (12), a concentrated chamber outlet (13) and an electrodeionization module (14); wherein: the dilute chamber inlet (8) is in communication with the dilute chamber outlet (9) to form a dilute chamber, and is used to remove the cations in the sample water; the dilute chamber outlet (9) is in communication with the inlet of the flow cell (11); the concentrated chamber inlet (12) is in communication with the concentrated chamber outlet (13) to form a concentrated chamber; the concentrated chamber inlet (12) is in communication with the outlet of the flow cell (11); The electrodeionization module (14) is divided into a dilute chamber and a concentrated chamber, the dilute chamber is in the middle of the concentrated chamber, the two sides of the dilute chamber and the concentrated chamber are separated by a cation exchange membrane, the inside of the dilute chamber and the concentrated chamber is filled with cation exchange resin, and positive and negative electrode plates are arranged on the two sides of the concentrated chamber.

4. The portable hydrogen conductivity measurement device based on electro- deionization according to claim 3, characterized in that, The electrodeionization module (14) is of "plate-frame" or "plate" structure, and has a sandwich structure inside, with the whole sequence being: positive plate-cation exchange membrane-concentrated chamber filled with ion exchange resin-cation exchange membrane-diluted chamber filled with ion exchange resin-cation exchange membrane-concentrated chamber filled with ion exchange resin-cation exchange membrane-negative plate; the cation exchange membrane is a selective cation exchange membrane CEM, which allows cations to pass through but blocks anions and water molecules, and the selective cation exchange membrane CEM is a perfluoropolymer or styrene-divinylbenzene copolymer of sulfonic acid group type; the ion exchange resin is a strong acid type cation exchange resin, which has polystyrene matrix particles with sulfonic acid groups, wherein, in the diluted chamber, the resin adsorbs cations in water through ion exchange, under the action of a direct current electric field, the adsorbed cations migrate to the negative electrode direction and pass through the cation membrane into the concentrated chamber, at the same time, water ionization produces H + The resin can be continuously regenerated, so that it always maintains the H type state, and continuous deep desalination is realized; the positive plate is an inert electrode using titanium-based coating iridium or ruthenium rare metal oxide, and the negative plate is 316 stainless steel or titanium material, after being electrified, oxidation reaction occurs on the positive plate, and reduction reaction occurs on the negative plate; the diluted chamber inlet (8) and the diluted chamber outlet (9) are standard interfaces on the module body, which are connected with other parts of the device through pipelines, the diluted chamber inlet receives sample water to be treated from the flow sensor (7), and the diluted chamber outlet delivers the deeply desalinated acidic sample water to the flow-through cell (11); the concentrated chamber inlet (12) and the concentrated chamber outlet (13) are standard pipeline interfaces, the concentrated chamber inlet (12) is used for receiving a small amount of sample water after measurement, i.e. flow-through cell outlet water, which serves as carrier water of the concentrated chamber and is used for receiving and discharging impurity ions migrated from the diluted chamber; the concentrated chamber outlet (13) discharges wastewater containing high-concentration impurity ions from the device.

5. The portable hydrogen conductivity measurement device based on electro- deionization according to claim 4, characterized in that, The flow of the concentrated chamber is manually / automatically controlled through a flow limiting orifice plate or a needle valve, so that the flow is much lower than that of the dilute chamber, so as to form concentrated water with high ion concentration.

6. The portable hydrogen conductivity measurement device based on electro- deionization according to claim 5, characterized in that, The measurement subsystem comprises a flow cell (11) and a conductivity electrode (10); wherein: The conductivity electrode (10) is arranged in the flow cell (11) and is used for measuring the hydrogen conductivity of sample water in real time.

7. The portable hydrogen conductivity measurement device based on electro- deionization according to claim 6, characterized in that, The flow cell (11) is made of polytetrafluoroethylene, polyether ether ketone or polypropylene material, which is a streamlined flow cavity without dead volume. The inlet and outlet of the flow cell (11) are connected with a pipeline system. The internal flow channel is designed as a straight-through type or with a flow guide groove, which ensures that the sample water can quickly respond and has no bubble retention when flowing through the conductivity electrode, thereby providing a stable and controllable measurement environment for the conductivity electrode. The conductivity electrode (10) is a two-electrode or four-electrode conductivity cell. The electrode constant of the conductivity electrode (10) is K = 0.01 or 0.1 cm -1 ; the contact part of the electrode element is made of a corrosion-resistant material, which is platinum (Pt) plated black or 316 stainless steel. The conductivity electrode (10) is built-in with a PT100 or PT1000 platinum resistance temperature sensor (RTD) for real-time measurement of sample water temperature and automatic temperature compensation (ATC). The conductivity electrode (10) is sealed and installed in the flow cell (11) through a standard 1 / 2 inch NPT or PG13.5 threaded interface. The conductivity electrode (10) and the temperature sensor (4) are connected with the processor through a cable.

8. A measurement method of a portable hydrogen conductivity measurement device based on electrodeionization according to any one of claims 1-7, which is realized based on the portable hydrogen conductivity measurement device based on electrodeionization, and comprises the following steps: S1, the sampling joint (1) is connected with a sample water pipeline in the field; S2, the device power-on switch is opened, the electric shut-off valve (4) is powered on, the processor determines the operation of the electric shut-off valve (4), the pressure control valve (2) and the electrodeionization module (14) based on the analysis of the collected sample water temperature, sample water pressure and sample water flow data, including: When the sample water temperature is too high, the electric shut-off valve (4) is automatically powered off and closed to cut off the connection between the sample water and the measurement device; The opening size of the main road and bypass of the pressure control valve (2) is controlled to adjust the pressure and flow, and when the sample water pressure is too high, the pressure control valve (2) automatically closes the main road opening and fully opens the bypass opening; When the sample water flow is too low, the power supply of the electrodeionization module (14) is automatically turned off; S3, the sample water enters the dilute chamber of the electrodeionization module (14) from the dilute chamber inlet (8), and the cations in the sample water are removed through ion dynamic exchange and ion permeation; S4, the sample water without cations reaches the flow cell (11) from the dilute chamber outlet (9), and the conductivity electrode (10) measures and collects the conductivity data of the sample water to complete the measurement of the hydrogen conductivity; S5, the sample water enters the concentrated chamber of the electric deionization module (14) from the concentrated chamber inlet (12) to be electrolyzed to produce H + , OH - , H2, O2; wherein, H + penetrates through the cation exchange membrane by ion migration, and is reduced by the ion dynamic exchange in the cation exchange resin in the dilute chamber. S6, sample water with H2, O2, OH - and other ions exit the concentration chamber outlet (13).

9. An electronic device comprising a battery, a gas alarm and a memory, the memory stores a plurality of instructions, a processor is used to read the instructions and execute the method of claim 8, the battery is used to power the device of any one of claims 1-7, and the gas alarm is used to monitor the hydrogen gas concentration in the use environment of the device of any one of claims 1-7, and the feedback signal comprises temperature, pressure and flow signals collected by the temperature sensor, the pressure sensor and the flow sensor of the sampling detection subsystem.

10. A computer readable storage medium, the computer readable storage medium stores a plurality of instructions, the plurality of instructions can be read and executed by a processor to execute the method of claim 8.

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