Integrated hydrogen detection and strong alkali solution elimination device and method

Abstract

The invention provides an integrated hydrogen detection and strong alkali solution elimination device and method. The integrated hydrogen detection and strong alkali solution elimination device comprises a detection module for detecting the hydrogen concentration in the environment; the strong alkali solution eliminating module is used for catalytically eliminating hydrogen in an alkaline environment; the sampling and gas control module is used for collecting environment gas and controlling the flow rate of the environment gas; the control module is respectively connected with the detection module, the strong alkali solution elimination module and the sampling and gas control module, and is used for receiving the detection signal and outputting a control instruction; and the power supply module supplies power to each module. According to the invention, the detection module, the strong alkali solution elimination module, the sampling and control module and the power supply module are integrated, so that a full-closed-loop safety protection system of real-time detection, intelligent judgment and efficient elimination of hydrogen is constructed. The device realizes quick response and efficient harmless treatment on hydrogen leakage by utilizing a strong alkali solution concerted catalysis technology, has the advantages of quick response, stable operation, high adaptability and the like, and is suitable for real-time leakage prevention and control in the fields of hydrogen energy storage, chemical production and the like.

Description

Technical Field

[0001] This invention relates to the field of hydrogen detection technology, and more particularly to a hydrogen detection device. Background Technology

[0002] Hydrogen, as a clean energy source and a key industrial raw material, presents a significant safety challenge in terms of leakage prevention. Hydrogen has a wide explosion limit (4%-75% by volume), a low ignition point, and is colorless and odorless, making it prone to combustion and explosion after leakage. Existing hydrogen elimination technologies largely rely on Pt / Pd gas-phase catalytic systems, which suffer from several key drawbacks: First, existing Pt, Pd, and other precious metal catalysts or alloy catalysts are easily deactivated by humidity, CO, and other impurities, requiring frequent replacement. Second, the reaction rate is slow at room temperature, requiring heating to achieve practical results, leading to high energy consumption. High-concentration hydrogen reactions are exothermic and can easily cause localized overheating, posing a combustion and explosion hazard. Furthermore, in this catalytic system, detection and elimination are often separate systems, resulting in long response delays and making rapid control of high-concentration leaks difficult.

[0003] Some studies have proposed that, under catalyst-mediated conditions, alkaline solutions can achieve hydrogen elimination reactions via OH− co-catalysis (in the presence of Pt / Ni-based alloy catalysts: H2 + 2OH−). - → 2H₂O + 2e - However, existing alkaline solution elimination systems are not fully integrated, resulting in problems such as insufficient gas-liquid contact, lack of monitoring of alkaline concentration decay, and low mass transfer efficiency, which cannot meet the "rapid detection-instant elimination" requirements of real-world scenarios. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention proposes an integrated hydrogen detection and strong alkali solution elimination device and method, which solves the problems of easy catalyst deactivation, high energy consumption, and response delay caused by the separation of detection and elimination systems in existing hydrogen elimination technologies.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] An integrated hydrogen detection and strong alkali solution elimination device includes: a detection module for real-time detection of hydrogen concentration in the environment; a strong alkali solution elimination module, including a reaction chamber, an alkali circulation system, and a Pt / Ni-based alloy catalyst supported on an alkali-resistant carrier surface, for catalytic elimination of hydrogen in an alkaline environment; a sampling and gas control module for collecting ambient gas and controlling its flow rate; a control module connected to the detection module, the strong alkali solution elimination module, and the sampling and gas control module respectively, for receiving detection signals and outputting control commands; and a power supply module for supplying power to each module; all the modules are integrated into a housing and connected via gas and / or liquid and / or electrical circuits.

[0007] Furthermore, the alkali solution in the strong alkali solution elimination module is a 0.5-1 mol / L KOH solution; the alkali solution circulation system includes a storage tank and an alkali-resistant peristaltic pump installed in the storage tank; the bottom of the reaction chamber is provided with a microporous aeration disc, and the upper part is provided with an alkali-resistant ceramic packing layer loaded with a Pt / Ni-based alloy catalyst.

[0008] Furthermore, the control module presets two alarm thresholds: the first level is 10% of the lower explosive limit of hydrogen, and the second level is 20% of the lower explosive limit of hydrogen; the control module dynamically adjusts the gas flow rate and the alkaline solution circulation rate according to the real-time hydrogen concentration.

[0009] Furthermore, the detection module includes a hydrogen concentration sensor, an alkali concentration monitoring unit, and a temperature control unit; the alkali concentration monitoring unit is used to monitor the alkali concentration in real time; and the temperature control unit is used to control the alkali temperature.

[0010] Furthermore, it also includes a drying unit located downstream of the air inlet for removing moisture from the gas to be treated; the drying unit has a built-in replaceable desiccant.

[0011] Furthermore, it also includes an alarm unit, which is an audible and visual alarm used to emit corresponding audible and visual signals according to the alarm level triggered by the control module.

[0012] A method for hydrogen detection and elimination, comprising the integrated hydrogen detection and strong alkali solution elimination device described above, further comprising the following steps: S1: Real-time detection of ambient hydrogen concentration via the detection module; S2: When the hydrogen concentration reaches a preset first-level alarm threshold, the control module triggers an alarm; when the hydrogen concentration reaches a higher second-level alarm threshold, the control module triggers an alarm and activates the strong alkali solution elimination module; S3: Adjusting the gas flow rate of the sampling and gas control module and the alkali circulation rate of the strong alkali solution elimination module according to the instructions of the control module; S4: Hydrogen-containing gas contacts the alkali solution and catalyst in the strong alkali solution elimination module, undergoing a catalytic oxidation reaction to achieve hydrogen elimination.

[0013] Furthermore, in step S1, the alkaline concentration is monitored in real time by an alkaline concentration monitoring unit, and an alkaline replenishment reminder is issued when the concentration is lower than 0.3 mol / L; and the alkaline temperature is controlled at 25-65℃ by a temperature control unit.

[0014] Furthermore, in step S3, the gas flow rate is adjusted to the range of 0.05-2 L / min, and the alkali circulation rate is adjusted to the range of 0.2-1 L / min.

[0015] Furthermore, before the hydrogen-containing gas enters the strong alkaline solution elimination module to undergo a catalytic oxidation reaction, the moisture in the hydrogen-containing gas is first removed by a dryer.

[0016] The beneficial effects of this invention are:

[0017] 1. This invention employs a liquid-phase catalytic system with a Pt / Ni-based alloy catalyst and a 0.5-1 mol / L strong alkaline solution to replace the traditional precious metal gas-phase catalysis, significantly reducing catalyst costs and effectively solving the problem of catalyst deactivation caused by humidity and impurity gases. At the same time, it can achieve efficient reactions in the room temperature to medium temperature range, avoiding the energy consumption and safety risks caused by high-temperature operation.

[0018] 2. This invention integrates modules such as hydrogen concentration detection, intelligent judgment, strong alkali solution elimination, alkali circulation and temperature control into the same sealed enclosure, constructing a closed-loop process of "real-time detection - intelligent control - efficient elimination", completely eliminating the response delay of discrete systems and achieving a second-level rapid response from leak detection to elimination.

[0019] 3. By integrating an alkali concentration monitoring unit, a temperature control unit, and an enhanced drying unit, and combining them with an intelligent control algorithm, this invention achieves real-time monitoring and adaptive adjustment of the reaction medium state (concentration, temperature) and the inlet gas quality (humidity), ensuring the long-term operational stability and reliability of the elimination efficiency of the device in complex industrial environments such as low temperature and high humidity.

[0020] 4. Through its modular and integrated compact design, this invention significantly reduces the equipment's footprint and installation complexity, facilitating flexible deployment and maintenance in space-constrained or multi-point deployment scenarios such as hydrogen storage stations and chemical workshops, thereby significantly improving the product's engineering practicality and economy. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a simplified structural diagram of the device of the present invention.

[0023] Figure 2 This is an internal structural diagram of the strong alkali solution elimination module of the present invention.

[0024] Figure 3 This is a block diagram of the device of the present invention.

[0025] Figure 4 This is a module association diagram of the device of the present invention.

[0026] Figure 5 This is a flowchart of the method of the present invention.

[0027] In the diagram: 1. Housing; 2. Air inlet; 3. Drying unit; 4. Detection module; 41. Hydrogen concentration sensor; 42. Alkali concentration monitoring unit; 43. Temperature sensor; 44. Heating element; 45. Tail gas hydrogen concentration sensor; 5. Control module; 6. Alarm unit; 7. Server management platform; 8. Strong alkali solution elimination module; 81. Reaction chamber; 82. Gas inlet; 83. Storage tank; 84. Alkali inlet; 85. Microporous aeration disc; 86. Alkali-resistant ceramic packing layer; 87. Pt / Ni-based alloy catalyst; 88. Alkali-resistant peristaltic pump; 89. Liquid pipeline; 810. Gas outlet; 811. Liquid outlet; 9. Sampling and gas control module; 10. Gas exhaust port. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0029] The integrated hydrogen detection and strong alkali solution elimination device described in Embodiment 1 of this invention adopts an integrated sealed enclosure design, compactly integrating all functional modules. The enclosure 1 is made of a corrosion-resistant and well-sealed material, and the protection level can be set according to the application scenario requirements. Internally, the devices are organically connected through gas pipelines, alkali solution circulation pipelines, and an electrical system, forming a collaborative whole.

[0030] like Figure 1 As shown, the housing 1 contains a detection module 4, a strong alkali solution elimination module 8, a sampling and gas control module 9, a control module 5, and a power supply module that supplies power to each part.

[0031] Specifically, such as Figure 2As shown, the strong alkali solution elimination module 8 includes a reaction chamber 81, a microporous aeration disc 85 disposed at the bottom of the reaction chamber 81, and an alkali-resistant ceramic packing layer 86 disposed at the top of the reaction chamber 81. The alkali-resistant ceramic packing layer 86 is loaded with a Pt / Ni-based alloy catalyst 87 for achieving safe hydrogen conversion. In this embodiment, the strong alkali solution elimination module uses a 0.5-1 mol / L KOH solution as the alkaline reaction medium, preferably with a concentration of 0.8 mol / L, balancing the rapid reaction kinetics brought about by the high OH⁻ ion concentration with the solution's fluidity and corrosivity. Figure 3 As shown, in the alkaline environment of the strong alkali solution elimination module 8, the Pt / Ni-based alloy catalyst 87 supported on the alkali-resistant ceramic filler 86 can efficiently catalyze the electrochemical oxidation reaction of hydrogen (H2 + 2OH-). - → 2H₂O + 2e - Pt / Ni-based alloy catalysts are supported in nanoparticle form on substrates with high specific surface area (≥500 m²). 2 / m 3 The reaction chamber 81 is designed with a high-efficiency gas-liquid contact structure. A microporous aeration disc 85 at the bottom, with a pore size ranging from 50-150 μm, disperses the introduced hydrogen-containing gas into fine bubbles, greatly increasing the gas-liquid contact area. The upper part of the reaction chamber 81 is filled with an alkali-resistant ceramic packing layer 86 loaded with a Pt / Ni-based alloy catalyst, further extending the bubble residence time and ensuring a complete reaction. The strong alkali solution elimination module 8 also includes an alkali circulation system, comprising a storage tank 83 and an alkali-resistant peristaltic pump 88 housed within the storage tank 83. The alkali-resistant peristaltic pump 88 is a peristaltic pump resistant to alkali corrosion. The alkali-resistant peristaltic pump 88 is connected to a liquid pipeline 89 extending into the reaction chamber 81. The upper part of the storage tank 83 has a gas inlet 82 and an alkali inlet 84, and the bottom of the storage tank 83 has a liquid outlet 811. An alkali-resistant peristaltic pump 88 pumps the alkali solution from the storage tank 83 into the bottom of the reaction chamber 81. After coming into countercurrent contact with the rising air bubbles, the solution overflows from the top of the reaction chamber 81 back into the storage tank 83, forming a circulation. This design avoids the generation of OH groups in the reaction zone. - Local depletion of concentration maintains stable elimination efficiency, and the circulation rate can be adjusted within the range of 0.2-1 L / min.

[0032] Furthermore, the core of the detection module 4 is a hydrogen concentration sensor 41, preferably a high-precision sensor based on electrochemical or semiconductor principles. The hydrogen concentration sensor has a detection range of 0-15000 ppm, a response time ≤1 second, ensuring rapid leak detection; and a resolution of up to 1 ppm, achieving accurate monitoring. The detection module converts the real-time concentration signal into an electrical signal and transmits it to the control module. For example... Figure 2 As shown, the detection module 4 also includes an alkali concentration monitoring unit 42 and a temperature control unit. The alkali concentration monitoring unit uses OH... -An ion-selective electrode monitors the concentration of the circulating alkali solution in real time. When the concentration falls below the maintenance limit of 0.3 mol / L, the alkali concentration monitoring unit 42 will issue an alkali replenishment reminder via a local indicator light or a host computer system, guiding the operator to add concentrated KOH solution. Since the reaction rate is affected by temperature, a temperature control unit is used to stabilize the alkali solution temperature within the optimal operating range of 25-65℃. The temperature control unit includes a heating element 44 (in this embodiment, a polyimide heating film) that conforms to the reaction chamber 81 and a high-precision temperature sensor 43, achieving precise temperature control within ±2℃ through a PID control algorithm.

[0033] In addition, a gas outlet 810 is provided above the tail end of the reaction chamber 81. A tail gas chamber is connected to the corresponding position of the chamber 1, and a gas exhaust port 10 is provided on the tail gas chamber. The detection module 4 also includes a tail gas hydrogen concentration sensor 45 installed in the tail gas chamber for detecting the hydrogen concentration in the tail gas.

[0034] Furthermore, the sampling and gas control module 9 is responsible for quantitatively collecting ambient gas and delivering it to subsequent units. It mainly includes a high-precision gas flow meter and a fast-response electromagnetic regulating valve (response time ≤ 0.2 seconds). The gas flow meter has a range of 0.05-2 L / min. By adjusting the valve opening, the control module can precisely control the intake flow within this range, ensuring that the gas has sufficient residence time (typically ≥ 1.5 seconds) in the elimination module to guarantee complete reaction.

[0035] Control module 5 uses an embedded microprocessor (such as ARM or a single-chip microcomputer) as its core and incorporates intelligent control algorithms. Its preset key safety parameters are two levels of alarm thresholds:

[0036] The first-level (early warning) threshold is set at 10% of the lower explosive limit of hydrogen (LEL, generally accepted as 4% by volume), which is approximately 4000 ppm. Reaching this concentration indicates an initial risk of leakage.

[0037] The second-level (emergency) threshold is set at 20% of the LEL, approximately 8000 ppm. Reaching this concentration indicates a significantly increased risk of leakage. The intelligence of the control module is reflected in its ability to not only trigger corresponding alarms after receiving real-time concentration data from the detection module, but also to dynamically adjust operating parameters based on the concentration value. For example, at higher concentrations, to ensure a complete reaction, the gas flow rate can be appropriately reduced while the alkali circulation rate is increased, achieving adaptive safety control.

[0038] Example 2 differs from Example 1 in that it further includes an auxiliary functional unit. For example... Figure 1As shown, the auxiliary functional units mainly include a drying unit 3 and an alarm unit 6. The drying unit 3 is located downstream of the air inlet 2 of the housing 1 and before the detection module 4. The drying unit 3 is filled with replaceable color-changing silica gel or composite desiccant to remove moisture from the ambient gas, preventing moisture from diluting the alkaline solution, affecting the catalyst activity, and interfering with the accuracy of hydrogen concentration detection.

[0039] Alarm unit 6 can be equipped with an audible and visual alarm. When the control unit triggers a level one warning, the alarm emits a yellow light and intermittent buzzing; when a level two emergency alarm is triggered, it emits a red light and rapid, continuous buzzing, so that on-site personnel can quickly identify the risk level.

[0040] The basic flow path of the integrated hydrogen detection and strong alkali solution elimination device is as follows: Ambient gas enters through the inlet and is first collected and its flow rate controlled by the sampling and gas control unit; then it flows through the drying unit to remove moisture; the purified gas enters the detection module for hydrogen concentration analysis; the detected hydrogen-containing gas is introduced into the core reaction chamber of the strong alkali solution elimination module for catalytic oxidation; finally, the treated clean gas is discharged from the outlet. The control module, acting as the system's "brain," receives detection signals in real time and directs the sampling, elimination, and temperature control modules to work collaboratively. The power module supplies power to the entire system.

[0041] In addition, the integrated hydrogen detection and strong alkali solution elimination device also includes a communication interface for connecting to a server management platform to enable remote transmission of hydrogen concentration, alkali concentration, and alkali temperature data, as well as remote monitoring of the device's operating status.

[0042] Example 3: The device of the present invention operates according to the following process to achieve automated detection and elimination of hydrogen:

[0043] Step S1: Real-time detection and monitoring

[0044] After power-on, the device enters standby monitoring mode. The detection module continuously samples and analyzes the ambient gas, acquiring hydrogen concentration data in real time and uploading it to the control module. Simultaneously, the alkali concentration monitoring unit and temperature control unit also begin operation to ensure the elimination module is in a ready state.

[0045] Step S2: The intelligent judgment and graded start control module compares the real-time hydrogen concentration with the preset two-level thresholds:

[0046] (1) If the concentration remains below the first threshold of 4000 ppm, the system will remain in monitoring mode;

[0047] (2) If the concentration reaches or exceeds the first-level threshold, the control module will immediately trigger a first-level warning and activate the audible and visual alarm to issue a warning.

[0048] (3) If the concentration rises sharply or directly reaches the second threshold of 8000 ppm, the control module immediately triggers the second-level emergency alarm and issues an emergency start command. The system enters the highest response state and simultaneously starts the alkali circulation system of the strong alkali solution elimination module, such as running at an initial rate of 0.5 L / min.

[0049] Step S3: Dynamic adjustment of parameters

[0050] Simultaneously or after the elimination module is activated, the control module dynamically adjusts two key operating parameters based on the real-time hydrogen concentration using an intelligent algorithm:

[0051] Gas flow rate: The intake gas flow rate is adjusted to a suitable level matching the risk level by controlling the electromagnetic regulating valve in the sampling and gas control module. For example, in the case of high-concentration leaks, the flow rate can be adjusted to near the lower limit of the range (e.g., 0.5 L / min) to prolong the reaction time; in the case of low concentrations, the flow rate can be appropriately increased (e.g., 1.5 L / min). The adjustment range is usually between 0.05-2 L / min.

[0052] Alkali circulation rate: The circulation speed of the alkali solution in the reaction chamber is adjusted by controlling the alkali-resistant peristaltic pump. The higher the concentration, the greater the demand for reactant (OH⁻) replenishment and heat dissipation, and the circulation rate should be increased accordingly. It can be adjusted within the range of 0.2-1 L / min.

[0053] Step S4: Highly efficient catalytic elimination

[0054] The hydrogen-containing gas, after flow regulation, first flows through a drying unit to remove moisture vapor before entering the strong alkali solution elimination module. The dried gas is then dispersed into microbubbles by a bottom microporous aeration disc and enters a packing layer filled with alkali solution and a Pt / Ni-based alloy catalyst. Here, under the combined action of the catalyst surface and the alkaline environment, the hydrogen undergoes a highly efficient catalytic oxidation reaction, converting into water, thus achieving safe elimination. The treated clean gas is discharged from the top of the unit.

[0055] Throughout the elimination process, the temperature control module operates continuously, maintaining the reaction system temperature within the preset optimal range of 25-65℃. The alkali concentration monitoring unit operates continuously, and when the concentration falls below 0.3 mol / L, the system will issue an alkali replenishment reminder. Once the hydrogen concentration, after treatment, remains below the first-level warning threshold and stabilizes for a period of time, the control module can instruct the system to gradually degrade its operation or return to standby monitoring mode.

[0056] Example 4: Performance test at room temperature and pressure

[0057] 1. Experimental Environment and Apparatus Setup

[0058] The test environment was a standard indoor environment with a temperature of 25 °C ± 2 °C and a relative humidity of 60% ± 5%. The device parameters were set as follows: the detection module's range was 0-15000 ppm; the control module's alarm thresholds were set based on the lower explosive limit of hydrogen (LEL, 4% volume concentration), with a first-level alarm (early warning) of 10% LEL (4000 ppm) and a second-level alarm (emergency) of 20% LEL (8000 ppm); the sampling gas flow rate was preset to 0.05-2 L / min. The gas used in the experiment was a standard hydrogen-air mixture (hydrogen concentration accuracy ±2%, oxygen concentration 21%), simulating a typical industrial environment. Before entering the device, the gas passed through a drying unit (with built-in color-changing silica gel) at the inlet to remove moisture.

[0059] 2. Implementation of the entire operation process of the device

[0060] After the device is powered on, it first performs a 3-second standby self-test to check the status of key components such as the hydrogen sensor, peristaltic pump, and heating membrane. After the self-test passes, the power indicator light turns solid green, and the system enters monitoring mode. The detection module continuously collects ambient hydrogen concentration data once per second.

[0061] When the simulated leak causes the hydrogen concentration to reach 4000 ppm (Level 1 warning threshold), the system enters the risk response phase: the yellow indicator light on the control panel illuminates, and the audible and visual alarm emits a low-frequency beep (1 time / second), indicating an initial leak risk. When the concentration further rises to 8000 ppm (Level 2 emergency threshold), the red indicator light illuminates, the alarm switches to a high-frequency beep (2 times / second), and the control module immediately sends an emergency start command to the elimination module and the gas control unit.

[0062] Immediately, the elimination process begins: the heating film in the temperature control unit raises the temperature of the alkaline solution (0.8 mol / L KOH solution) in the storage tank from room temperature to 35 °C within 3 seconds; simultaneously, the alkali-resistant peristaltic pump starts alkali solution circulation at a rate of 0.5 L / min, and the electromagnetic regulating valve adjusts the inlet gas flow rate to 1 L / min. Hydrogen-containing gas is dispersed into microbubbles by the aeration disc at the bottom of the reaction chamber and flows upward through the alkali-resistant ceramic packing layer loaded with a Pt / Ni-based alloy catalyst. Under suitable alkaline solution temperature and concentration, and with the synergistic effect of the catalyst, hydrogen undergoes a highly efficient catalytic oxidation reaction (H₂ + 2OH⁻). - → 2H₂O + 2e - It is rapidly decomposed.

[0063] When the detection module detects a hydrogen concentration below 4000 ppm for 30 consecutive seconds, the system performs a shutdown reset: the control module automatically shuts down the elimination module (stops the peristaltic pump and heating) and activates the audible and visual alarms, and the device returns to a low-power standby monitoring state. Simultaneously, the system internally records and stores all key data related to this event, including the start-up time, the highest hydrogen concentration processed, the total elimination time, and the change in alkaline solution concentration before and after the reaction.

[0064] In addition, the device features intelligent maintenance reminders. This is achieved through the alkali concentration monitoring unit (OH... - The ion electrode provides real-time monitoring. When the alkali concentration drops to 0.3 mol / L due to reaction consumption, the "alkali replenishment" indicator light on the control panel illuminates, and the server management platform simultaneously sends an alkali replenishment reminder. Maintenance personnel only need to add 5 mol / L concentrated KOH solution to the storage tank to the calibration mark to quickly restore the device to full-capacity operation.

[0065] 3. Experimental Data and Performance Analysis

[0066] To quantitatively evaluate the device performance, a system test was conducted under the stated environment, and the specific data is recorded in the table below:

[0067]

[0068] Data analysis shows that when the hydrogen concentration is below the secondary emergency start threshold (8000 ppm), the device is in a pre-warning monitoring state, the elimination module does not activate, and there is no consumption of alkali solution. This design optimizes energy consumption and reagent lifespan. Once the concentration reaches or exceeds 8000 ppm, the elimination module activates immediately. Under conditions of an inlet flow rate of 100 mL / min and an initial concentration of 8000 ppm, the hydrogen concentration at the device outlet can be reduced to 40 ppm, with an elimination rate as high as 99.5%, demonstrating its high efficiency. As the processing load increases (concentration increases or inlet flow rate increases), the elimination rate remains consistently above 98.0%. For example, at the highest test load (15000 ppm, 600 mL / min), the elimination rate still reaches 98.0%, and the outlet concentration of 300 ppm is far below the lower explosive limit, fully demonstrating the stability and reliability of the device in handling significant leaks. Meanwhile, the orderly decrease in concentration after the alkaline reaction (from 0.8 mol / L to a minimum of 0.6 mol / L) matched the amount of hydrogen converted, verifying the accuracy of the monitoring unit and the controllability of the reaction.

[0069] The results fully demonstrate that the device of the present invention can not only achieve closed-loop automatic operation of the entire process from "detection, early warning, emergency start-up, efficient elimination to intelligent reset", but also maintain a high elimination rate of over 98.0% under a wide concentration range of 500 ppm to 15000 ppm and different inlet gas loads of 100-600 mL / min, exhibiting excellent responsiveness, processing efficiency and operational reliability, and fully meeting the stringent requirements for hydrogen leakage safety protection in typical scenarios such as hydrogen energy storage stations.

[0070] Example 5: Implementation and Performance Testing under Low Temperature and High Humidity Conditions

[0071] 1. Experimental Environment and Apparatus Setup

[0072] The test environment was set at a temperature of -10 °C ± 3 °C and a relative humidity of 85% ± 5%. To cope with these harsh conditions, the device underwent targeted pre-setting and modification: a 20 mm thick polyurethane insulation layer was added to the sealed enclosure; an anti-condensation device was installed at the air inlet to prevent low-temperature condensation from affecting the smooth flow of gas; and the control range of the sampling gas flow rate was expanded to 0.1-4 L / min to accommodate potentially higher wind speeds outdoors. The core judgment logic of the device remained unchanged, and the control module still used a two-level alarm threshold based on the lower explosive limit (LEL) of hydrogen: a first-level warning at 10% LEL (4000 ppm) and a second-level emergency activation at 20% LEL (8000 ppm).

[0073] 2. Work Process

[0074] To ensure efficient and stable operation in low-temperature and high-humidity environments, several parameters of the core modules of the device have been optimized:

[0075] (1) Strong Alkali Solution Elimination Module: The alkali solution is adjusted to a 0.6 mol / L KOH solution. This concentration can balance ion migration rate and fluidity at low temperatures, avoiding crystallization. A polyvinyl fluoride modified hydrophobic coating is added to the surface of the Pt / Ni-based alloy catalyst to reduce the adsorption of moisture in high-humidity gas at the active sites. The pore size of the aeration disc at the bottom of the reaction chamber is adjusted to 80-150 μm to prevent micropore freezing and clogging; the specific surface area of ​​the alkali-resistant ceramic filler inside is increased to ≥600 m² / m³ to prolong the gas-liquid contact time.

[0076] (2) Temperature control unit: The heating element is replaced with a 40 W silicone rubber heating film, and the outer wall of the reaction chamber and the bottom of the storage tank are heated simultaneously. The target temperature of the alkali solution is set at 40 ± 2 °C. The reaction chamber and the storage tank are wrapped with a rock wool insulation layer to ensure that the temperature control response time is ≤2 seconds.

[0077] (3) Drying unit: A composite desiccant is used. In this embodiment, the composite desiccant is a mixture of color-changing silica gel and molecular sieve in a 1:1 mass ratio, with a total weight of 80 g. Its adsorption capacity is increased to 1.5 times that of the basic scheme, which can ensure that the inlet dew point is ≤-10°C and effectively remove high humidity.

[0078] Under this configuration, the device's workflow is executed automatically as follows:

[0079] After the device is powered on, it first performs a 5-second standby self-test (including detection of heating film performance and desiccant status). Upon successful self-test, it enters monitoring mode. When the hydrogen concentration reaches 4000 ppm, a level one warning is triggered (yellow light on, low-frequency beep); when it reaches 8000 ppm, a level two emergency alarm is triggered (red light on, high-frequency beep). The control module activates the elimination module within 0.5 seconds. The elimination process then begins: the heating film heats the alkali solution to 40 °C within 5 seconds; the control module dynamically adjusts parameters based on the real-time concentration—for concentrations ≥12000 ppm, the alkali solution circulation rate is set to 1 L / min and the gas flow rate to 0.5 L / min; for concentrations between 8000-12000 ppm, the alkali solution circulation rate is set to 0.8 L / min and the gas flow rate to 0.8 L / min. The deeply dried gas is dispersed and then undergoes catalytic oxidation within the reaction chamber. When the hydrogen concentration remains below 4000 ppm for 30 consecutive seconds, the system will shut down and reset, disabling the elimination module and alarm. The insulation system will maintain the alkali solution at 30 °C during standby. The device will also issue corresponding maintenance reminders when the alkali solution concentration is ≤0.3 mol / L or the desiccant humidity is ≥60%.

[0080] 3. Experimental Data and Performance Analysis

[0081]

[0082] Data analysis shows that the device remains in a pre-warning monitoring state until the concentration reaches the secondary alarm threshold (8000 ppm), which complies with the safety and energy-saving design. In extreme environments (-10°C, 85% humidity), after activating the elimination module, the device demonstrates highly efficient elimination capabilities for hydrogen leaks ranging from 8000 ppm to 15000 ppm, with a stable conversion rate between 98.1% and 99.2%.

[0083] Even under the dual loads of high inlet flow rate (400 mL / min) and high concentration (15000 ppm), the elimination rate remained as high as 98.1%, demonstrating its strong processing capacity and environmental adaptability. The consumption of alkali concentration (reduced from 0.6 mol / L to a minimum of 0.43 mol / L) matched the hydrogen processing volume, and the post-reaction outlet concentration was far below the hazardous value, verifying the system's reliability and control precision under extreme conditions.

[0084] This embodiment fully verifies the stable operation and efficient processing capability of the integrated device of the present invention under extreme conditions of low temperature and high humidity. Through targeted optimization of parameters such as heat preservation, anti-condensation, alkali concentration adjustment, catalyst hydrophobic treatment, enhanced drying, and temperature control, as well as intelligent adaptive control strategies, the challenges posed by extreme environments were successfully overcome. Experimental data demonstrates that its hydrogen removal efficiency consistently remains above 98%, and it possesses the capability to handle high-flow-rate gases. This fully meets the stringent requirements for hydrogen leakage safety protection devices in complex industrial scenarios such as outdoor environments and seasonally cold and humid conditions, showcasing excellent robustness and wide applicability.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions of some or all of the technical features thereof, within the spirit and principles of the present invention, 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, and should all be included within the protection scope of the present invention.

Claims

1. An integrated hydrogen detection and strong alkali solution elimination device, characterized in that, include: The detection module (4) is used to detect the hydrogen concentration in the environment in real time; the strong alkali solution elimination module (8) includes a reaction chamber (81), an alkali circulation system and a Pt / Ni-based alloy catalyst (87) supported on the surface of an alkali-resistant carrier, which is used to catalytically eliminate hydrogen in an alkaline environment; the sampling and gas control module (9) is used to collect ambient gas and control its flow rate; the control module (5) is connected to the detection module (4), the strong alkali solution elimination module (8) and the sampling and gas control module (9) respectively, and is used to receive detection signals and output control commands; A power supply module is used to supply power to each module; each of the modules is integrated into the housing and connected by air and / or liquid and / or electrical circuits.

2. The integrated hydrogen detection and strong alkali solution elimination device according to claim 1, characterized in that, The alkali solution in the strong alkali solution elimination module (8) is a 0.5-1 mol / L KOH solution; the alkali solution circulation system includes a storage tank (83) and an alkali-resistant peristaltic pump (88) installed in the storage tank (83); the bottom of the reaction chamber (81) is provided with a microporous aeration plate (85), and the upper part is provided with an alkali-resistant ceramic packing layer (86) loaded with a Pt / Ni-based alloy catalyst (87).

3. The integrated hydrogen detection and strong alkali solution elimination device according to claim 1 or 2, characterized in that, The control module (5) presets two alarm thresholds: the first level is 10% of the lower explosive limit of hydrogen, and the second level is 20% of the lower explosive limit of hydrogen; the control module dynamically adjusts the gas flow rate and the alkaline solution circulation rate according to the real-time hydrogen concentration.

4. The integrated hydrogen detection and strong alkali solution elimination device according to claim 1 or 2, characterized in that, The detection module (4) includes a hydrogen concentration sensor (41), an alkali concentration monitoring unit (42), and a temperature control unit; the alkali concentration monitoring unit (42) is used to monitor the alkali concentration in real time; the temperature control unit is used to control the alkali temperature.

5. The integrated hydrogen detection and strong alkali solution elimination device according to claim 1 or 2, characterized in that, It also includes a drying unit (3) located downstream of the air inlet (2) for removing moisture from the gas to be treated; the drying unit (3) has a built-in replaceable desiccant.

6. The integrated hydrogen detection and strong alkali solution elimination device according to claim 1 or 2, characterized in that, It also includes an alarm unit (6), which is an audible and visual alarm used to emit corresponding audible and visual signals according to the alarm level triggered by the control module (5).

7. A method for detecting and eliminating hydrogen, characterized in that, Including the integrated hydrogen detection and strong alkali solution elimination device as described in any one of claims 1 to 6, and also Includes the following steps: S1: The detection module (4) detects the ambient hydrogen concentration in real time; S2: When the hydrogen concentration reaches the preset first-level alarm threshold, the control module (5) triggers an alarm; when the hydrogen concentration reaches a higher second-level alarm threshold, the control module (5) triggers an alarm and starts the strong alkali solution elimination module (8); S3: According to the instructions of the control module (5), the gas flow rate of the sampling and gas control module (9) and the alkali circulation rate of the strong alkali solution elimination module (8) are adjusted; S4: The hydrogen-containing gas comes into contact with the alkali solution and catalyst in the strong alkali solution elimination module (8) and undergoes a catalytic oxidation reaction to achieve hydrogen elimination.

8. The method for detecting and eliminating hydrogen according to claim 7, characterized in that, In step S1, the alkaline concentration is monitored in real time by an alkaline concentration monitoring unit (42), and an alkaline replenishment reminder is issued when the concentration is lower than 0.3 mol / L; and the alkaline temperature is controlled at 25-65℃ by a temperature control unit.

9. The method for detecting and eliminating hydrogen according to claim 7, characterized in that, In step S3, the gas flow rate is adjusted to the range of 0.05-2 L / min, and the alkali circulation rate is adjusted to the range of 0.2-1 L / min.

10. The method for detecting and eliminating hydrogen according to claim 8 or 9, characterized in that, Before the hydrogen-containing gas enters the strong alkali solution elimination module (8) to undergo a catalytic oxidation reaction, the moisture in the hydrogen-containing gas is first removed by the drying unit (3).

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