Natural hydrogen sampling and analyzing system, method and device

Abstract

The invention discloses a natural hydrogen sampling and analyzing system, method and device, and the system comprises a control unit which is used for starting an air exhaust power device and is communicated with a monitoring channel; the air exhaust power device is used for exhausting air; the gas collection bottle is used for collecting soil gas; the hydrogen concentration detection sensor is used for monitoring the hydrogen concentration of the soil gas in real time; the control unit is used for analyzing the real-time monitoring data, when the real-time monitoring data exceeds a preset threshold value, the three-way electromagnetic valve is controlled to be communicated with the collection channel, the sampling flow of the mass flow control device is set to be preset sampling flow, and the mass flow control device is controlled to calculate the real-time hydrogen sampling total volume; the control unit is further used for controlling the natural hydrogen sampling and analyzing system to stop sampling when the real-time hydrogen sampling total volume calculated by the mass flow control device reaches the preset total volume, so that the precision and efficiency of natural hydrogen sampling and analyzing can be improved, the sampling range is expanded, gas leakage in the transportation process is avoided, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of gas exploration technology, and in particular to a natural hydrogen sampling and analysis system, method and apparatus. Background Technology

[0002] Against the backdrop of energy transition, natural hydrogen, with its abundant reserves, zero carbon emissions, and renewable nature, has become a crucial resource for energy system innovation. However, the hydrogen energy industry currently faces a severe structural contradiction: it is predicted that hydrogen demand will exceed 115 million tons by 2030, while current natural hydrogen extraction accounts for less than 0.3%. Accelerating the exploration and development of underground natural hydrogen resources has become a core issue for ensuring energy security. Mainstream natural hydrogen exploration methods include surface satellite image recognition, gas geochemical analysis and testing, and surface soil hydrogen detection, but these are all in their initial stages and cannot support widespread natural hydrogen resource exploration and precise location. Accelerating the research and development of natural hydrogen exploration equipment is the core driving force for natural hydrogen exploration.

[0003] Natural hydrogen, due to its small molecular structure and high permeability, easily escapes from underground to the surface. In-situ soil gas sampling at surface points and analysis of natural hydrogen emissions are key technologies for identifying hydrogen-rich areas and predicting deep reservoirs, effectively guiding natural hydrogen exploration and evaluation. The separate detection process of "field sampling bag collection + laboratory gas chromatography analysis" suffers from problems such as long testing time, gas leakage during transportation, and high testing costs, making it difficult to support hydrogen exploration needs at the square kilometer level. Currently, commonly used surface natural hydrogen detection devices mainly achieve real-time detection of soil hydrogen content by drilling holes in the soil and incorporating a sampler and gas analyzer. However, the accuracy of the test results is affected by factors such as the type of sampler, the idle time of the sampling hole, the depth of the sampling hole, and the looseness of the soil. Furthermore, these instruments are expensive, and high-temperature and high-humidity operating environments can easily affect their performance, increasing maintenance costs. Summary of the Invention

[0004] This invention provides a natural hydrogen sampling and analysis system to improve the accuracy and efficiency of natural hydrogen sampling and analysis, expand the sampling range, avoid gas leakage during transportation, and reduce maintenance costs. The system includes: multiple sampling units, a gas drying tube, a monitoring channel, a data acquisition channel, and a control unit. The monitoring channel includes a hydrogen concentration detection sensor. The data acquisition channel includes a hydrogen enrichment sampling tube, a mass flow control device, and a pumping power device connected in sequence. The multiple sampling units are connected in parallel. One end of the gas drying tube is connected to both the monitoring channel and the data acquisition channel via a three-way solenoid valve. The other end of the gas drying tube is connected to the multiple sampling units. The other end of the hydrogen enrichment sampling tube is connected to the mass flow control device and the pumping power device in sequence. Each of the multiple sampling units includes a gas collection bottle and a hydrophobic filter membrane.

[0005] The control unit is used to start the pumping power unit, set the monitoring flow of the mass flow control device to the preset monitoring flow, and control the three-way solenoid valve to connect the monitoring channel.

[0006] The pumping power unit is used to pump out gas, creating negative pressure within the natural hydrogen sampling and analysis system;

[0007] The gas collecting bottle has a permeable structure at the end near the soil, and the gas collecting bottle is used to collect soil gas through the permeable structure; the soil gas is drawn into the gas collecting bottle due to negative pressure.

[0008] Hydrophobic filter membranes are used to filter particulate matter and / or liquids from soil gases;

[0009] Gas drying tubes are used to remove water vapor from soil gases flowing through hydrophobic filter membranes;

[0010] The hydrogen concentration detection sensor is used to monitor the hydrogen concentration in the soil gas after water vapor removal in real time and transmit the real-time monitoring data to the control unit.

[0011] The control unit is also used to analyze real-time monitoring data. When the analysis results indicate that the real-time monitoring data exceeds the preset threshold, it controls the three-way solenoid valve to close the monitoring channel and connect the acquisition channel, sets the sampling flow rate of the mass flow control device to the preset sampling flow rate, and controls the mass flow control device to calculate the total volume of real-time hydrogen sampling.

[0012] Hydrogen enrichment sampling tubes are used to collect hydrogen from soil gases.

[0013] The control unit is also used to control the natural hydrogen sampling and analysis system to stop sampling when the real-time total hydrogen sampling volume calculated by the mass flow control device reaches the preset total volume.

[0014] This invention provides a method for sampling and analyzing natural hydrogen gas, applied to the aforementioned control unit, to improve the accuracy and efficiency of natural hydrogen gas sampling and analysis, expand the sampling range, avoid gas leakage during transportation, and reduce maintenance costs. The method includes:

[0015] Acquire real-time monitoring data; the real-time monitoring data is obtained by the hydrogen concentration detection sensor monitoring the hydrogen concentration of soil gas after water vapor removal; the soil gas is collected through multiple sampling units connected in parallel;

[0016] Analyze the real-time monitoring data to obtain the analysis results;

[0017] When the analysis results indicate that the real-time monitoring data exceeds the preset threshold, hydrogen in the soil gas is sampled to obtain the total real-time hydrogen sampling volume.

[0018] Sampling stops when the total volume of real-time hydrogen sampling reaches the preset total volume.

[0019] This invention provides a natural hydrogen sampling and analysis device, applied to the aforementioned control unit, to improve the accuracy and efficiency of natural hydrogen sampling and analysis, expand the sampling range, avoid gas leakage during transportation, and reduce maintenance costs. The device includes:

[0020] The real-time monitoring data acquisition module is used to acquire real-time monitoring data; the real-time monitoring data is obtained by the hydrogen concentration detection sensor monitoring the real-time hydrogen concentration of soil gas after water vapor removal; the soil gas is collected through multiple sampling units connected in parallel.

[0021] The analysis module is used to analyze real-time monitoring data and obtain analysis results;

[0022] The sampling module is used to sample hydrogen in the soil gas when the analysis results indicate that the real-time monitoring data exceeds a preset threshold, and to obtain the total volume of real-time hydrogen sampling.

[0023] The judgment module is used to stop sampling when the total volume of real-time hydrogen sampling reaches the preset total volume.

[0024] Compared with existing natural hydrogen exploration methods, this invention utilizes multiple sampling units, a gas drying tube, a monitoring channel, a collection channel, and a control unit. The monitoring channel includes a hydrogen concentration detection sensor. The collection channel includes a hydrogen enrichment sampling tube, a mass flow control device, and a pumping power device connected in sequence. Multiple sampling units are connected in parallel. One end of the gas drying tube is connected to both the monitoring and collection channels via a three-way solenoid valve. The other end of the gas drying tube is connected to multiple sampling units. The other end of the hydrogen enrichment sampling tube is connected to the mass flow control device and the pumping power device in sequence. Each sampling unit includes a gas collection bottle and a hydrophobic filter membrane. The control unit is used to activate the pumping power device, set the monitoring flow rate of the mass flow control device to a preset monitoring flow rate, and control the three-way solenoid valve to connect to the monitoring channel. The pumping power device is used to pump gas, creating a negative pressure within the natural hydrogen sampling and analysis system. The gas collection bottle has a permeable structure near the soil end, which is used to collect soil gas. The soil gas is then... The gas is drawn into the collection bottle under negative pressure; a hydrophobic filter membrane is used to filter particulate matter and / or liquid in the soil gas; a gas drying tube is used to remove water vapor from the soil gas flowing through the hydrophobic filter membrane; a hydrogen concentration detection sensor is used to monitor the real-time hydrogen concentration of the soil gas after water vapor removal and transmit the real-time monitoring data to the control unit; the control unit is also used to analyze the real-time monitoring data, and when the analysis results indicate that the real-time monitoring data exceeds a preset threshold, it controls the three-way solenoid valve to close the monitoring channel and connect the acquisition channel, sets the sampling flow rate of the mass flow control device to the preset sampling flow rate, and controls the mass flow control device to calculate the total real-time hydrogen sampling volume; a hydrogen enrichment sampling tube is used to collect hydrogen in the soil gas; the control unit is also used to control the natural hydrogen sampling and analysis system to stop sampling when the total real-time hydrogen sampling volume calculated by the mass flow control device reaches the preset total volume, which can improve the accuracy and efficiency of natural hydrogen sampling and analysis, expand the sampling range, avoid gas leakage during transportation, and reduce maintenance costs. Attached Figure Description

[0025] 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. In the drawings:

[0026] Figure 1 This is a structural diagram of a natural hydrogen sampling and analysis system provided in an embodiment of the present invention;

[0027] Figure 2 This is a structural diagram of a specific example of a natural hydrogen sampling and analysis system provided in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of an arrangement of air collecting holes provided in an embodiment of the present invention;

[0029] Figure 4 This is a flowchart of a natural hydrogen sampling and analysis method provided in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of a natural hydrogen sampling and analysis device provided in an embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0033] The acquisition, storage, use, and processing of data in this application all comply with relevant regulations.

[0034] In this document, the term "and / or" merely describes a relationship, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0035] In the description of this specification, the terms "comprising," "including," "having," and "containing" are open-ended terms, meaning that they include but are not limited to. The terms "an embodiment," "a specific embodiment," "some embodiments," and "for example," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of this application, and the order of steps is not limited and can be adjusted appropriately as needed.

[0036] Based on the background technology, there is an urgent need to improve existing technical methods to reduce the maintenance cost of instruments while increasing testing accuracy and expanding the sampling area.

[0037] This invention provides an integrated system for rapid collection and concentration detection of natural hydrogen in soil, addressing the shortcomings of existing equipment in detecting and collecting natural hydrogen in soil samples. This portable system integrates surface sampling and detection of natural hydrogen (H2) for efficient collection, filtration, and analysis of free hydrogen in surface soil.

[0038] Specifically, the embodiments of this invention aim to solve the following problems: ① Traditional single-point sampling devices have low sampling efficiency. The embodiments of this invention, through the design of multiple parallel gas collecting bottles, can collect gas from different sites simultaneously or at different times, significantly expanding the sampling range and improving the representativeness of gas samples and the efficiency of field surveys; ② The embodiments of this invention monitor hydrogen concentration changes in real time through built-in sensors and innovatively adopt an intelligent triggering mechanism based on hydrogen concentration feedback. This enables automatic activation of enrichment sampling only when the detected concentration exceeds a preset threshold, thereby greatly improving the targeting and success rate of sampling and ensuring that the amount of sample collected is sufficient to meet the requirements of high-precision laboratory analysis. ③ This system addresses the issues of low reliability and short lifespan in humid environments by employing a pre-processing module (hydrophobic filter membrane and drying tube) to effectively remove solid particles and moisture from the gas, providing a dry and clean working environment for the high-precision sensors at the back end. This significantly enhances the adaptability and durability of the equipment in humid environments while reducing instrument maintenance costs. ④ By setting up a control unit, this embodiment of the invention achieves unified scheduling of the air pump, mass flow control device, solenoid valve, and sensors, realizing full automation of the sampling process after instrument deployment. This reduces operational difficulty and human error, making large-scale field applications possible. In summary, this embodiment of the invention significantly improves upon the shortcomings of traditional sampling equipment, providing a more efficient and economical practical tool for field surveys and target area identification of natural hydrogen resources.

[0039] To achieve the above objectives, embodiments of the present invention provide a natural hydrogen sampling and analysis system. Figure 1 This is a structural diagram of a natural hydrogen sampling and analysis system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the system may include: multiple sampling units, a gas drying tube 4, a monitoring channel, a data acquisition channel, and a control unit 11; the monitoring channel includes a hydrogen concentration detection sensor 7; the data acquisition channel includes a hydrogen enrichment sampling tube 8, a mass flow control device 9, and a pumping power device 10 connected in sequence; the multiple sampling units are connected in parallel; one end of the gas drying tube 4 is connected to the monitoring channel and the data acquisition channel respectively through a three-way solenoid valve 5; the other end of the gas drying tube 4 is connected to multiple sampling units; the other end of the hydrogen enrichment sampling tube 8 is connected to the mass flow control device 9 and the pumping power device 10 in sequence; the multiple sampling units each include a gas collection bottle 1 and a hydrophobic filter membrane 2;

[0040] Control unit 11 is used to start the air extraction power unit 10, set the monitoring flow rate of mass flow control device 9 to the preset monitoring flow rate, and control the three-way solenoid valve 5 to connect the monitoring channel.

[0041] The pumping power unit 10 is used to pump out gas, creating a negative pressure within the natural hydrogen sampling and analysis system.

[0042] The gas collecting bottle 1 has a permeable structure at the end near the soil. The gas collecting bottle 1 is used to collect soil gas through the permeable structure. The soil gas is drawn into the gas collecting bottle 1 due to negative pressure.

[0043] Hydrophobic filter membrane 2 is used to filter particulate matter and / or liquids in soil gases;

[0044] The gas drying tube 4 is used to remove water vapor from soil gas flowing through the hydrophobic filter membrane 2;

[0045] The hydrogen concentration detection sensor 7 is used to monitor the hydrogen concentration of soil gas after water vapor removal in real time and transmit the real-time monitoring data to the control unit 11.

[0046] The control unit 11 is also used to analyze real-time monitoring data. When the analysis results indicate that the real-time monitoring data exceeds a preset threshold, the control unit 11 controls the three-way solenoid valve 5 to close the monitoring channel and connect the acquisition channel, sets the sampling flow rate of the mass flow control device 9 to the preset sampling flow rate, and controls the mass flow control device 9 to calculate the total volume of real-time hydrogen sampling.

[0047] Hydrogen enrichment sampling tube 8 is used to collect hydrogen from soil gases;

[0048] The control unit 11 is also used to control the natural hydrogen sampling and analysis system to stop sampling when the real-time total hydrogen sampling volume calculated by the mass flow control device 9 reaches the preset total volume.

[0049] Figure 2 This is a structural diagram of a specific example of a natural hydrogen sampling and analysis system provided in an embodiment of the present invention, as shown below. Figure 2 As shown, in one embodiment, the multiple sampling units further include a first solenoid valve 3; the first solenoid valve 3 is connected in series at the rear end of the hydrophobic filter membrane 2; the control unit 11 is also used to control the opening degree of the first solenoid valve 3 to control the opening degree of the gas collecting bottle 1.

[0050] In this embodiment, a first solenoid valve 3 is connected in series at the rear end of the hydrophobic polytetrafluoroethylene (PTFE) filter membrane so that the sampling point can be precisely controlled by the control unit 11 to prevent unknown gases or pollutants from other gas collection cylinders 1 and the soil environment connected to them from entering the main gas path when sampling one or several points, thus protecting the desiccant, sensor and enrichment tube.

[0051] like Figure 2As shown, in one embodiment, a one-way solenoid valve 6 is provided between the three-way solenoid valve 5 and the hydrogen concentration detection sensor 7; the one-way solenoid valve 6 is used to block the reverse airflow when the pressure of the natural hydrogen sampling and analysis system is abnormal.

[0052] like Figures 1-2 As shown, this invention provides a portable integrated system for rapid sampling and concentration detection of natural hydrogen in soil, addressing the problems of existing technologies. The system includes multiple parallel sampling units, each equipped with a gas collection bottle 1. A permeable structure is provided at the soil-near end of the gas collection bottle 1. A hydrophobic filter membrane 2 and a first solenoid valve 3 are sequentially connected to the outlet of each gas collection bottle 1. The outputs from the multiple sampling units converge and are connected to a gas drying tube 4 (gas pretreatment module) for dehumidifying and purifying the collected gas. The output of the gas pretreatment module is divided into two paths via a three-way solenoid valve 5. One path connects to a one-way solenoid valve 6, with a hydrogen concentration detection sensor 7 connected to its rear end. The other path connects to a hydrogen enrichment sampling tube 8. A mass flow control device 9 and a pumping power device 10 are connected to the rear end of the hydrogen enrichment sampling tube 8. The system also includes an integrated control unit 11.

[0053] In one embodiment, the gas collecting bottle is made of a chemically inert material, such as borosilicate glass or stainless steel with a passivated surface, to reduce the adsorption of gas samples, especially hydrogen molecules, thus ensuring sampling accuracy. The volume of the gas collecting bottle 1 can be selected between 100 ml and 2000 ml, preferably 500 ml, depending on the sampling requirements. For areas with low hydrogen concentrations, a larger volume gas collecting bottle 1 can be used, or the number of parallel gas collecting bottles 1 can be increased to obtain sufficient gas samples; for rapid surveys, a smaller volume gas collecting bottle 1 can be used to improve deployment efficiency.

[0054] In one embodiment, the breathable structure is in the form of micropores or slits, the pore size or width of which is suitable for blocking soil particles from entering.

[0055] Figure 3 This is a schematic diagram of the arrangement of air collecting holes provided in an embodiment of the present invention, such as... Figure 3 As shown, in one embodiment, the permeable structure includes multiple gas collecting holes with a diameter of 0.1mm to 0.2mm arranged in a quincunx or staggered pattern on the body of the gas collecting bottle 1. This ensures that soil gas enters the gas collecting bottle 1 while blocking the vast majority of soil particles from entering.

[0056] In one embodiment, the permeable structure includes multiple perforations with a diameter of 0.5 mm to 1.0 mm arranged in a quincunx pattern at the bottom of the gas collecting bottle 1. This is to keep the gas inside the gas collecting bottle 1 in a relatively dry state.

[0057] In one embodiment, the hydrophobic filter membrane 2 is made of a hydrophobic material that does not react with hydrogen gas and does not react with other gases in the soil to produce or consume hydrogen gas. It is used to further remove water vapor and solid particles from the gas path. Preferably, it is a filter membrane or filter element made of polytetrafluoroethylene (PTFE). A hydrophobic filter membrane is connected to the inlet of each gas collecting bottle 1 via a PTFE tubing. This filter membrane is preferably a hydrophobic PTFE filter membrane with a pore size of 0.2 μm to 1 μm. It is used to block soil particles and liquid water, ensuring that the gas entering the subsequent pipeline is clean and dry, thereby protecting precision components such as the hydrogen concentration detection sensor 7 and the pumping power unit 10.

[0058] In one embodiment, the gas drying tube 4 is a desiccant unit and / or a membrane separation unit; the desiccant unit is filled with an adsorbent; the desiccant unit is a detachable structure; and the membrane separation unit is a separation membrane with hydrogen selective separation function.

[0059] In this embodiment, the desiccant unit is filled with an adsorbent such as a type 3A molecular sieve; the desiccant unit has a detachable structure, which facilitates replacement or regeneration after saturation; optionally, the system may also include a heating component and a purge gas path for online heating and regeneration of the desiccant unit.

[0060] In this embodiment, a (gas) membrane separation unit can be connected to the rear end of the desiccant unit. The gas membrane separation unit can use a polymer material with hydrogen selective separation function, such as a separation membrane made of polyimide or polysulfone, to increase the relative concentration of hydrogen in the sample gas.

[0061] In one embodiment, a gas drying tube 4 is connected to the outlet of the gas manifold of multiple parallel gas collecting cylinders 1. The gas drying tube 4 is made of polytetrafluoroethylene (PTFE) and filled with type 3A molecular sieve desiccant to effectively remove water molecules from the gas and protect downstream precision instruments. The amount of type 3A molecular sieve desiccant can vary from 10 grams to 100 grams depending on the humidity level of the environment; the drying tube has a detachable structure for easy replacement or regeneration of the desiccant after it becomes saturated.

[0062] In one embodiment, a three-way solenoid valve 5 is connected to the outlet of the gas drying tube 4. The normally open (NO) port of the three-way solenoid valve 5 is connected to a one-way solenoid valve 6, and its normally closed (NC) port is connected to the hydrogen enrichment sampling tube 8. The one-way solenoid valve 6 is used to block the reverse airflow when the system pressure is abnormal (such as when the pump is shut down), preventing the hydrogen concentration detection sensor 7 connected to the outlet of the one-way solenoid valve 6 from being contaminated by the high concentration of hydrogen flowing back from the hydrogen enrichment sampling tube 8.

[0063] In one embodiment, such as Figure 2As shown, the gas pretreatment module has a one-way solenoid valve 6 connected to one of its outlets to ensure unidirectional gas flow, prevent backflow contamination, and thus protect the downstream detection device.

[0064] In one embodiment, the hydrogen enrichment sampling tube 8 is an adsorption tube filled with adsorbent; the adsorbent is used to enrich hydrogen in soil gas.

[0065] In this embodiment, the hydrogen enrichment sampling tube 8 is a sample storage unit used to collect and store gas samples. The sample storage unit is an adsorption tube filled with adsorbent, which can be activated carbon, carbon molecular sieve, or other materials that enrich hydrogen, to meet different sampling accuracy and cost requirements.

[0066] In one embodiment, the hydrogen enrichment sampling tube 8 is a detachable structure, connected to the main pipeline via a quick-sealing connector, facilitating complete disassembly and replacement after sampling. The enrichment tube is made of passivated stainless steel, and is filled with carbon-based materials, precious metal-based materials, or other materials that enrich hydrogen as adsorbents. After sampling, the enrichment tube is sealed and disassembled, and sent to the laboratory for subsequent analysis such as thermal desorption.

[0067] In one embodiment, the mass flow control device 9 is used to precisely control the sampling airflow rate and total volume.

[0068] In one embodiment, the inner walls of each gas passage are made of a chemically inert material to reduce the adsorption loss of hydrogen during transport.

[0069] In one embodiment, the control unit is signal-connected to the hydrogen concentration detection sensor 7, the first solenoid valve 3, the three-way solenoid valve 5, the mass flow control device 9, and the pumping power device 10.

[0070] In one embodiment, a hydrogen concentration detection sensor 7 is connected to the outlet of a one-way solenoid valve 6 to provide real-time feedback of hydrogen concentration data in the gas pipeline.

[0071] In one embodiment, a mass flow control device (MFC) 9 and a pumping power device 10 (micro diaphragm pump) are sequentially connected at the outlet of the hydrogen enrichment sampling tube 8 via a polytetrafluoroethylene (PTFE) pipeline to precisely control the flow rate of the gas in the gas pipeline and the volume of the gas passing through the enrichment tube.

[0072] In one embodiment, the control unit 11 is developed using an embedded system, receives signals from the hydrogen concentration detection sensor 7, and controls the start-up, shutdown, and linkage of the first solenoid valve 3, the three-way solenoid valve 5, the mass flow control device 9, and the pumping power device 10.

[0073] In this embodiment, the control unit is configured to: control the time-division switching of each first solenoid valve 3 to realize concentration detection and batch collection at multiple sampling points; receive real-time monitoring data from the hydrogen concentration detection sensor 7; automatically control the three-way solenoid valve 5 to switch between the collection and monitoring channels based on the comparison result of the real-time monitoring data and the preset threshold; switch the airflow from the monitoring path to the enrichment sampling path when the concentration exceeds the preset threshold; control the operating parameters of the mass flow control device 9 to adjust the sampling flow rate and calculate the cumulative collection volume; and control the start and stop of the pumping power device 10 to cooperate with different working modes.

[0074] In one embodiment, through centralized scheduling of the control unit, the system can automate the entire process from soil gas sampling and real-time concentration monitoring to intelligent triggering enrichment sampling, effectively solving the technical problems of low efficiency, high blindness, and difficulty in dealing with low concentration environments in manual sampling.

[0075] The working principle and process of this invention are as follows:

[0076] Step 1: Deployment Preparation

[0077] Multiple gas collection cylinders 1 are buried at different points in the target soil area. The hydrogen enrichment sampling tube 8 is connected to the main system line via a quick connector.

[0078] Step 2: Device startup and gas concentration detection:

[0079] The user starts the system via control unit 11. Control unit 11 first starts the pumping power unit 10 and sets the mass flow control device 9 to a lower monitoring flow rate (e.g., 100 mL / min).

[0080] The control unit 11 sequentially opens a first solenoid valve 3 (e.g., a valve connected to the gas collecting bottle 1) while simultaneously switching the three-way solenoid valve 5 to the normally open (NO) path.

[0081] Soil gas is extracted from gas collecting bottle 1, flows through hydrophobic filter membrane 2 to filter particulate matter and liquid water, and then enters gas drying tube 4 to remove moisture. The dried and purified gas then passes through three-way solenoid valve 5, pushes open one-way solenoid valve 6, and finally reaches hydrogen concentration detection sensor 7 for real-time concentration monitoring. The monitoring data is transmitted in real time to control unit 11 for display and processing.

[0082] Step 3: Trigger sampling:

[0083] Control unit 11 continuously analyzes concentration data. When it detects that the hydrogen concentration at the current monitoring point continuously exceeds the preset threshold, it immediately executes the sampling procedure.

[0084] The control unit 11 maintains the current open state of the first solenoid valve 3 and switches the three-way solenoid valve 5 to the normally closed (NC) passage. At the same time, it increases the flow rate setting of the mass flow control device 9 to the sampling flow rate (e.g., 200 mL / min).

[0085] At this point, the airflow direction changes, and the dried gas no longer flows towards the hydrogen concentration detection sensor 7, but instead flows entirely towards the hydrogen enrichment sampling tube 8. The hydrogen in the gas is captured by the adsorbent in the enrichment tube, while the other gases flow through the mass flow control device 9 and the pumping power device 10 before being discharged into the air.

[0086] Step 4: Quantitative sampling:

[0087] The control unit 11 accumulates the total volume sampled by the mass flow control device 9. When the volume reaches a set value (e.g., 2L), the control unit 11 automatically closes the current first solenoid valve 3 and the suction power device 10, and stops sampling.

[0088] The user manually disassembles the sealed hydrogen enrichment sampling tube 8 and sends it back to the laboratory for analysis.

[0089] Step 5: Cyclic Operation:

[0090] The control unit 11 can automatically control the opening of the next first solenoid valve 3 to continue monitoring the next point, repeating the second to fourth steps above, until all points have been screened and sampled.

[0091] It should be noted that:

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention. For example, parameters such as the number and volume of gas collecting bottles 1, the types of desiccant and adsorbent, the selection of sensors, and the flow rate can all be adjusted according to actual needs. The automation program of the control unit 11 can also be flexibly set, such as dynamically adjusting the flow rate according to the concentration, or simultaneously opening multiple gas collecting bottles 1.

[0093] This invention also proposes a method for sampling and analyzing natural hydrogen, the principle of which is similar to that of the natural hydrogen sampling and analysis system, and will not be described in detail here.

[0094] Figure 4 This is a flowchart of a natural hydrogen sampling and analysis method provided in an embodiment of the present invention, such as... Figure 4 As shown, the natural hydrogen sampling and analysis method is applied to the above-mentioned control unit, and the method may include:

[0095] Step 401: Obtain real-time monitoring data; the real-time monitoring data is obtained by the hydrogen concentration detection sensor monitoring the real-time hydrogen concentration of soil gas after water vapor removal; the soil gas is collected through multiple sampling units connected in parallel.

[0096] Step 402: Analyze the real-time monitoring data to obtain the analysis results;

[0097] Step 403: When the analysis results indicate that the real-time monitoring data exceeds the preset threshold, hydrogen in the soil gas is sampled to obtain the total volume of real-time hydrogen sampling.

[0098] Step 404: When the total volume of real-time hydrogen sampling reaches the preset total volume, sampling is stopped.

[0099] This invention also proposes a natural hydrogen sampling and analysis device, the principle of which is similar to that of the natural hydrogen sampling and analysis system, and will not be described in detail here.

[0100] Figure 5 This is a schematic diagram of a natural hydrogen sampling and analysis device provided in an embodiment of the present invention, as shown below. Figure 5 As shown, a natural hydrogen sampling and analysis device is applied to the aforementioned control unit, and this device may include:

[0101] The real-time monitoring data acquisition module 501 is used to acquire real-time monitoring data; the real-time monitoring data is obtained by the hydrogen concentration detection sensor after the water vapor is removed from the soil gas and the hydrogen concentration is monitored in real time; the soil gas is collected through multiple sampling units connected in parallel.

[0102] Analysis module 502 is used to analyze real-time monitoring data and obtain analysis results;

[0103] The sampling module 503 is used to sample hydrogen in the soil gas when the analysis results indicate that the real-time monitoring data exceeds a preset threshold, and to obtain the total volume of real-time hydrogen sampling.

[0104] The judgment module 504 is used to stop sampling when the total volume of real-time hydrogen sampling reaches the preset total volume.

[0105] Compared with existing natural hydrogen exploration methods, this invention utilizes multiple sampling units, a gas drying tube, a monitoring channel, a collection channel, and a control unit. The monitoring channel includes a hydrogen concentration detection sensor. The collection channel includes a hydrogen enrichment sampling tube, a mass flow control device, and a pumping power device connected in sequence. Multiple sampling units are connected in parallel. One end of the gas drying tube is connected to both the monitoring and collection channels via a three-way solenoid valve. The other end of the gas drying tube is connected to multiple sampling units. The other end of the hydrogen enrichment sampling tube is connected to the mass flow control device and the pumping power device in sequence. Each sampling unit includes a gas collection bottle and a hydrophobic filter membrane. The control unit is used to start the pumping power device, set the monitoring flow rate of the mass flow control device to a preset monitoring flow rate, and control the three-way solenoid valve to connect the monitoring channel. The pumping power device is used to pump gas, creating a negative pressure within the natural hydrogen sampling and analysis system. The gas collection bottle has a permeable structure near the soil end, allowing it to collect soil gas. The soil gas... Negative pressure is drawn into the gas collection bottle; a hydrophobic filter membrane is used to filter particulate matter and / or liquid in the soil gas; a gas drying tube is used to remove water vapor from the soil gas flowing through the hydrophobic filter membrane; a hydrogen concentration detection sensor is used to monitor the real-time hydrogen concentration of the soil gas after water vapor removal and transmit the real-time monitoring data to the control unit; the control unit is also used to analyze the real-time monitoring data, and when the analysis results indicate that the real-time monitoring data exceeds a preset threshold, it controls the three-way solenoid valve to close the monitoring channel and connect the acquisition channel, sets the sampling flow rate of the mass flow control device to the preset sampling flow rate, and controls the mass flow control device to calculate the total real-time hydrogen sampling volume; a hydrogen enrichment sampling tube is used to collect hydrogen from the soil gas; the control unit is also used to control the natural hydrogen sampling and analysis system to stop sampling when the total real-time hydrogen sampling volume calculated by the mass flow control device reaches the preset total volume, which can improve the accuracy and efficiency of natural hydrogen sampling and analysis, expand the sampling range, avoid gas leakage during transportation, and reduce maintenance costs.

[0106] The following technical effects can be achieved through the embodiments of the present invention:

[0107] This invention employs a multi-parallel gas collection device structure, effectively expanding the collection range of soil hydrogen and significantly improving sampling speed. Through a real-time concentration monitoring feedback control mechanism, enrichment sampling is automatically triggered only when the detected hydrogen concentration exceeds a threshold, and collection stops once the gas volume collected in the sampling tube reaches the target. This avoids ineffective operations in low-concentration background areas, improves the timeliness of replacing enrichment tubes, and thus significantly improves sampling efficiency and success rate. Combined with a highly efficient gas pretreatment module, damage to the concentration detection sensor from moist soil gases is effectively reduced, extending equipment lifespan and lowering maintenance costs. This device is particularly suitable for the rapid screening and evaluation of natural hydrogen resources in the field, providing reliable technical support for target area delineation in favorable hydrogen enrichment zones.

[0108] This invention also provides a computer device. Figure 6 This is a schematic diagram of a computer device in an embodiment of the present invention. The computer device 600 includes a memory 610, a processor 620, and a computer program 630 stored in the memory 610 and executable on the processor 620. When the processor 620 executes the computer program 630, it implements the above-mentioned natural hydrogen sampling and analysis method.

[0109] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described natural hydrogen sampling and analysis method.

[0110] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described natural hydrogen sampling and analysis method.

[0111] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0112] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0113] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0114] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0115] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A natural hydrogen sampling and analysis system, characterized in that, include: The system comprises multiple sampling units, a gas drying tube (4), a monitoring channel, a collection channel, and a control unit (11); the monitoring channel includes a hydrogen concentration detection sensor (7); the collection channel includes a hydrogen enrichment sampling tube (8), a mass flow control device (9), and a pumping power device (10) connected in sequence; the multiple sampling units are connected in parallel; one end of the gas drying tube (4) is connected to the monitoring channel and the collection channel respectively through a three-way solenoid valve (5); the other end of the gas drying tube (4) is connected to the multiple sampling units; the other end of the hydrogen enrichment sampling tube (8) is connected to the mass flow control device (9) and the pumping power device (10) in sequence; the multiple sampling units each include a gas collecting bottle (1) and a hydrophobic filter membrane (2); The control unit (11) is used to start the pumping power device (10), set the monitoring flow of the mass flow control device (9) to the preset monitoring flow, and control the three-way solenoid valve (5) to connect the monitoring channel. The pumping power device (10) is used to pump gas to create a negative pressure in the natural hydrogen sampling and analysis system; The gas collecting bottle (1) has a permeable structure at the soil end, and the gas collecting bottle (1) is used to collect soil gas through the permeable structure; the soil gas is drawn into the gas collecting bottle (1) due to the negative pressure. The hydrophobic filter membrane (2) is used to filter particulate matter and / or liquid in soil gas; The gas drying tube (4) is used to remove water vapor from the soil gas flowing through the hydrophobic filter membrane (2); The hydrogen concentration detection sensor (7) is used to monitor the hydrogen concentration of soil gas after water vapor removal in real time and transmit the real-time monitoring data to the control unit (11). The control unit (11) is also used to analyze real-time monitoring data. When the analysis results indicate that the real-time monitoring data exceeds the preset threshold, the three-way solenoid valve (5) is controlled to close the monitoring channel and connect the acquisition channel. The sampling flow rate of the mass flow control device (9) is set to the preset sampling flow rate. The mass flow control device (9) is controlled to calculate the total volume of real-time hydrogen sampling. The hydrogen enrichment sampling tube (8) is used to collect hydrogen from soil gases; The control unit (11) is also used to control the natural hydrogen sampling and analysis system to stop sampling when the real-time hydrogen sampling total volume calculated by the mass flow control device (9) reaches the preset total volume.

2. The system as described in claim 1, characterized in that, The plurality of sampling units each further includes a first solenoid valve (3); the first solenoid valve (3) is connected in series at the rear end of the hydrophobic filter membrane (2); The control unit (11) is also used to control the opening of the first solenoid valve (3) to control the opening of the gas collecting bottle (1).

3. The system as described in claim 1, characterized in that, A one-way solenoid valve (6) is provided between the three-way solenoid valve (5) and the hydrogen concentration detection sensor (7); the one-way solenoid valve (6) is used to block the reverse airflow when the pressure of the natural hydrogen sampling and analysis system is abnormal.

4. The system as described in claim 1, characterized in that, The gas drying tube (4) is a desiccant unit and / or a membrane separation unit; The desiccant unit is filled with an adsorbent; the desiccant unit is a detachable structure. The membrane separation unit is a separation membrane with hydrogen selective separation function.

5. The system as described in claim 1, characterized in that, The hydrogen enrichment sampling tube (8) is an adsorption tube filled with adsorbent; the adsorbent is used to enrich hydrogen in soil gas.

6. The system as described in claim 1, characterized in that, The permeable structure includes multiple gas collection holes with a diameter of 0.1mm to 0.2mm, which are opened in a plum blossom shape on the body of the gas collecting bottle (1).

7. The system as described in claim 1, characterized in that, The permeable structure includes multiple water seepage holes with a diameter of 0.5 mm to 1.0 mm, which are opened in a plum blossom shape at the bottom of the gas collecting bottle (1).

8. A method for sampling and analyzing natural hydrogen gas, characterized in that, Applied to the control unit (11) of claims 1-7, the method comprises: Acquire real-time monitoring data; the real-time monitoring data is obtained by a hydrogen concentration detection sensor monitoring the real-time hydrogen concentration of soil gas after water vapor removal; the soil gas is collected through multiple sampling units connected in parallel; Analyze the real-time monitoring data to obtain the analysis results; When the analysis results indicate that the real-time monitoring data exceeds the preset threshold, hydrogen in the soil gas is sampled to obtain the total real-time hydrogen sampling volume. Sampling stops when the total volume of real-time hydrogen sampling reaches the preset total volume.

9. A natural hydrogen sampling and analysis device, characterized in that, Applied to the control unit (11) according to claims 1-7, the device comprises: A real-time monitoring data acquisition module is used to acquire real-time monitoring data; the real-time monitoring data is obtained by a hydrogen concentration detection sensor monitoring the real-time hydrogen concentration of soil gas after water vapor removal; the soil gas is collected through multiple sampling units connected in parallel. The analysis module is used to analyze real-time monitoring data and obtain analysis results; The sampling module is used to sample hydrogen in the soil gas when the analysis results indicate that the real-time monitoring data exceeds a preset threshold, and to obtain the total volume of real-time hydrogen sampling. The judgment module is used to stop sampling when the total volume of real-time hydrogen sampling reaches the preset total volume.

10. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of claim 8.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of claim 8.

12. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of claim 8.

Images