The important application of hydrogen sensor in hydrogen generator cabinet

        The monitoring of hydrogen concentration in hydrogen generator tank is a crucial step to ensure safe operation. The following content summarizes the core points of hydrogen concentration detection in hydrogen generator tank:

        First, Detection methods

        1. Sensor detection

        Catalytic combustion sensor: Determines the hydrogen concentration by detecting the heat generated by the combustion of hydrogen in the presence of a catalyst. This sensor has a high sensitivity to hydrogen, but may be interfered with by other combustible gases.

        Electrochemical sensor: The REDOX reaction of hydrogen on the electrode is used to generate a current, and the current is proportional to the concentration of hydrogen. The electrochemical sensor has good selectivity and stability.

        Semiconductor sensor: Based on the interaction between hydrogen and semiconductor material, its resistance value changes, and then reflects the change of hydrogen concentration. The response speed of semiconductor sensor is fast, but its detection accuracy is relatively low.

        Quantum conductivity sensor: Based on the principle of quantum conductivity, hydrogen molecules will interact with electrons in the material after contacting the sensor's sensitive material, changing the energy state and distribution of electrons. It has the advantages of high sensitivity and fast response speed.

        2. Gas chromatography

        Gas chromatography is a high-precision analytical method that can accurately determine the concentration of hydrogen. It works by separating hydrogen from other gases and then detecting the hydrogen content with a detector. Gas chromatography is suitable for occasions where the concentration of hydrogen is required to be high, but the equipment cost is high and the operation is relatively complicated.

        Second, the detection position

        1. Inside the hydrogen generator tank

        Install a sensor or sampling point inside the hydrogen generation tank to directly detect the production and accumulation of hydrogen. In this way, hydrogen leaks or abnormally elevated concentrations can be detected in time.

        Pay attention to select the appropriate installation position to avoid interference or damage.

        2. Hydrogen outlet

        Detecting the hydrogen concentration at the hydrogen discharge outlet can understand the emission of hydrogen and ensure that the emission meets the environmental requirements.

        At the same time, it can also monitor the operating status of the hydrogen generator tank to determine whether there are problems such as leakage.

        3. Your surroundings

        Check the environment around the hydrogen generator tank to ensure that hydrogen leakage does not pose a hazard to personnel and equipment.

        The detection point can be set in the vent, aisle and other positions near the hydrogen generator tank.

        Third, Detection frequency

        1. Continuous detection

        For important hydrogen generating tanks, continuous detection can be used to monitor the hydrogen concentration in real time. In this way, problems can be detected in time and measures can be taken to ensure safe operation.

        Continuous inspection can be done using sensors or on-line monitoring systems.

        2. Regular testing

        For the general hydrogen generator tank, regular testing can be carried out, such as daily, weekly or monthly testing. Regular testing can be done by means of portable detectors or sampling analysis.

        3. Special case detection

        After the hydrogen generator is repaired, maintained or modified, special testing should be carried out to ensure the safety performance of the equipment.

        In addition, when hydrogen leaks or other anomalies are found, they should also be tested immediately.

        Fourth, security measures

        1. Alarm system

        Install hydrogen concentration alarm device, when the hydrogen concentration exceeds the set safety limit, sound and light alarm signal is issued to remind personnel to take measures.

        The alarm device should have reliable performance and accurate alarm threshold.

        2. Ventilation system

        The hydrogen generator tank should be equipped with a good ventilation system to ensure that the hydrogen can be discharged in time to reduce the hydrogen concentration.

        The ventilation system should be kept in normal operation and inspected and maintained regularly.

        3. Safe operation procedures

        Develop strict safety operation procedures to regulate the operation and maintenance process of hydrogen generator tank. Operators should be trained to be familiar with hydrogen characteristics and safety precautions.

        During the operation, strictly follow the safety operation rules to avoid accidents such as hydrogen leakage.

        In short, the detection of hydrogen concentration in hydrogen generator tank is an important link to ensure the safety of hydrogen use. Hydrogen leakage and explosion accidents can be effectively prevented by selecting appropriate detection method and location, determining reasonable detection frequency and taking corresponding safety measures.