Constant-pressure online detection device and method for concentration and flow of gas escaped from hot spring

Abstract

The invention relates to the technical field of earthquake detection, and discloses a constant-pressure online detection device and method for the concentration and flow of gas escaped from a hot spring, and the device comprises a gas collecting hood, a buffer bottle, a gas flow detector, a constant-volume gas storage chamber, a constant-pressure detection valve, an online gas detector and a central controller; the gas collecting hood is arranged in a corresponding area of hot spring escape gas and collects the hot spring escape gas; the gas inlet end of the surge flask is communicated with the gas collecting hood through a pipeline, and the gas outlet end is communicated with the gas inlet end of the constant-volume gas storage chamber through a gas flow detector; the constant-volume gas storage chamber is communicated with an on-line gas detector pipeline through a constant-pressure detection valve, and when the air pressure value of hot spring escape gas stored in the constant-volume gas storage chamber is larger than a preset air pressure threshold value, the hot spring escape gas enters the on-line gas detector through the constant-pressure detection valve; the on-line gas detector is used for detecting gas components and concentration of gas escaped from the hot spring and sending detection data to the central controller.

Description

Technical Field

[0001] The present invention relates to the technical field of earthquake detection, and in particular to a device and method for online constant-pressure detection of hot spring escaping gas concentration and flow. Background Art

[0002] Monitoring of hot spring escaping gas is one of the important means of monitoring earthquake precursors. The components of hot spring escaping gas mainly include CO2, CH4, He, etc. By monitoring the composition and concentration changes of these gases, it is possible to reflect geothermal and structural changes deep in the crust. At present, the technology of using hot spring escaping gas monitoring for earthquake prediction analysis is still under development, and the technical methods of hot spring escaping gas monitoring still need to be further improved to improve the accuracy and scientificity of this method in earthquake prediction applications.

[0003] The hot spring escaping gas monitoring technology currently used in the earthquake industry is mainly divided into two methods: manual and online. The manual monitoring method requires staff to collect gas or water at the hot spring site and bring it back to the laboratory for concentration analysis, but it is impossible to monitor the flow of escaping gas; the online monitoring method mainly conducts continuous observations at fixed time intervals at a fixed location, gathers the escaping gas through a gas collection device, and through pumping, allows the gas to enter the online detection instrument for analysis and testing. The sampling frequency is generally 1 time / hour, but it is not suitable for hot springs with too small gas flow or large gas flow changes.

[0004] The existing hot spring escaping gas monitoring technology has the following shortcomings: First, the escaping gas flow rate of many natural hot springs is small, which is difficult to meet the gas volume required for fixed time interval measurement of most gas geochemical online observation instruments (conventional instruments usually require 1 liter / minute), which may lead to inaccurate instrument analysis results; second, natural hot spring gas usually escapes intermittently, and some hot springs may even stop degassing for a long time. If the online observation of gas components is still carried out according to the existing fixed time period, it will cause large random fluctuations in the observation data, thereby covering up abnormal information; finally, the existing observations are mainly focused on the online monitoring of gas chemical composition, and the monitoring of gas flow has not yet been realized. For gas from a fixed source, the changes before the earthquake may not come from the change of gas, and the changes in its chemical composition may not be significant, but mainly manifested as changes in gas flow. Summary of the invention

[0005] The purpose of the embodiments of the present invention is to provide a constant-pressure online detection device and method for the concentration and flow of hot spring escaping gas. The hot spring escaping gas is collected by a constant-volume gas storage chamber. When the gas pressure reaches a preset threshold, the constant-pressure detection valve opens to transport the gas to the online gas detector at a stable pressure, thereby ensuring that the online gas detector can continuously and stably obtain detection samples, avoiding detection errors or interruptions caused by unstable gas supply, and maintaining the smooth operation of the detection process.

[0006] In order to solve the above technical problems, a first aspect of an embodiment of the present invention provides a constant pressure online detection device for hot spring escape gas concentration and flow rate, comprising: a gas collecting hood, a buffer bottle, a gas flow detector, a constant volume gas storage chamber, a constant pressure detection valve, an online gas detector and a central controller; The gas collecting hood is arranged in the corresponding area of ​​the hot spring escaping gas to collect the hot spring escaping gas; The gas inlet end of the buffer bottle is connected to the gas collecting hood pipeline, and the gas outlet end thereof is connected to the gas inlet end pipeline of the constant volume gas storage chamber through the gas flow detector; The constant volume gas storage chamber is connected to the online gas detector pipeline through the constant pressure detection valve. When the pressure value of the hot spring escaped gas stored in the constant volume gas storage chamber is greater than the preset pressure threshold, the gas enters the online gas detector through the constant pressure detection valve; The online gas detector detects the gas composition and concentration of the gas escaping from the hot spring, and sends the detection data to the central controller.

[0007] Furthermore, the hot spring escaping gas concentration and flow constant pressure online detection device also includes: A gas circuit one-way valve is arranged in series in the pipeline between the gas flow detector and the constant volume gas storage chamber.

[0008] Furthermore, a one-way drain port is provided at the bottom of the buffer bottle, and the one-way drain port is used to drain condensed water accumulated at the bottom of the buffer bottle.

[0009] Furthermore, the gas collecting hood is a circular retractable structure.

[0010] Furthermore, an impurity filter is provided at the air inlet end of the air collecting hood.

[0011] Furthermore, the hot spring escaping gas concentration and flow constant pressure online detection device also includes: A drying chamber is arranged in series at the gas outlet end of the buffer bottle to dry the gas escaping from the hot spring.

[0012] Furthermore, a pressure sensor, a temperature sensor and a humidity sensor are provided inside the constant volume gas storage chamber; The pressure sensor, temperature sensor and humidity sensor are respectively in data communication with the central controller; The central controller receives the pressure detection data, temperature detection data, humidity detection data inside the constant volume gas storage chamber and the hot spring escaping gas detection data of the online gas detector, and calibrates the hot spring escaping gas detection data based on the pressure detection data, temperature detection data, and humidity detection data.

[0013] Furthermore, the constant volume gas storage chamber includes a plurality of gas storage units, and the plurality of gas storage units are connected to each other through an electric control valve gas path; The central controller is electrically connected to a plurality of electrically controlled valves respectively, and controls the opening or closing of the plurality of electrically controlled valves according to the flow rate of the gas escaping from the hot spring.

[0014] Furthermore, a gas composition prediction and detection component is provided in the constant volume gas storage chamber, and the gas composition pre-detection component is electrically connected to the central controller; The central controller receives the gas composition abnormality detection signal from the gas composition prediction and detection component, and controls the online gas detector to perform corresponding detection.

[0015] Accordingly, a second aspect of an embodiment of the present invention provides a method for online detection of hot spring escaping gas concentration and flow rate constant pressure, and the hot spring escaping gas is detected based on the online detection device for hot spring escaping gas concentration and flow rate constant pressure, comprising the following steps: The hot spring escaping gas is collected based on a gas collecting hood, and the hot spring escaping gas is introduced into a buffer bottle for drying; The gas flow detector detects the flow data of the hot spring escaping gas after drying and imports it into a constant volume gas storage chamber; When the pressure value of the hot spring escaping gas stored in the constant volume gas storage chamber is greater than the preset pressure threshold, the gas enters the online gas detector through the constant pressure detection valve; The gas composition and concentration of the gas escaping from the hot spring are detected based on the online gas detector, and the detection result is sent to the central controller.

[0016] The above technical solution of the embodiment of the present invention has the following beneficial technical effects: 1. The gas escaping from the hot spring is collected in a constant volume gas storage chamber. When the gas pressure reaches the preset threshold, the constant pressure detection valve opens to deliver the gas to the online gas detector at a stable pressure, ensuring that the online gas detector can continuously and stably obtain test samples, avoiding detection errors or interruptions caused by unstable gas supply, and maintaining the smooth operation of the detection process;

[0017] 2. The composition and concentration of the gas escaping from the hot spring are measured based on the online gas detector. Before the gas enters the detector, the constant volume gas storage chamber provides data to the central controller through the internal pressure, temperature and humidity sensors to calibrate the test results. The constant pressure detection valve ensures the stability of the gas pressure entering the online gas detector, eliminates the interference of pressure, temperature, humidity and other factors on the detection, ensures the accuracy and reliability of the output data of the online gas detector, and provides solid data support for the study of hot spring gas characteristics; 3. Through the gas composition prediction and detection component set in the constant volume gas storage chamber, after monitoring the abnormal gas composition, a signal will be sent to the central controller, thereby triggering the online gas detector to perform targeted detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the principle of a constant-pressure online detection device for hot spring escaping gas concentration and flow rate provided by an embodiment of the present invention; Figure 2 It is a flow chart of a method for online constant pressure detection of hot spring escaping gas concentration and flow rate provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0020] Please refer to Figure 1 According to a first aspect of an embodiment of the present invention, there is provided an online constant-pressure detection device for the concentration and flow of hot spring escaping gas, comprising: a gas collecting hood, a buffer bottle, a gas flow detector, a constant-volume gas storage chamber, a constant-pressure detection valve, an online gas detector and a central controller; the gas collecting hood is arranged in the corresponding area of ​​the hot spring escaping gas to collect the hot spring escaping gas; the gas inlet end of the buffer bottle is connected to the gas collecting hood pipeline, and the gas outlet end thereof is connected to the gas inlet end pipeline of the constant-volume gas storage chamber through the gas flow detector; the constant-volume gas storage chamber is connected to the online gas detector pipeline through a constant-pressure detection valve, and when the pressure value of the hot spring escaping gas stored in the constant-volume gas storage chamber is greater than a preset pressure threshold, the hot spring escaping gas enters the online gas detector through the constant-pressure detection valve; the online gas detector detects the gas composition and concentration of the hot spring escaping gas, and sends the detection data to the central controller.

[0021] In a specific implementation of an embodiment of the present invention, the edge of the gas collecting hood adopts a flexible and inflatable sealing structure. When placed in the area where hot spring gas escapes, the edge is inflated to fit tightly to irregular surfaces such as the ground or the wall of the hot spring pool, effectively preventing gas leakage and ensuring that the hot spring gas escapes to the maximum extent. A plurality of gas concentration sensors are also installed inside the gas collecting hood to monitor the gas concentration distribution at different positions in the gas collecting hood in real time. If it is found that the gas concentration in a certain area is low, it means that the gas collecting hood may have a problem of poor collection efficiency there. The central controller will automatically adjust the shape or position of the gas collecting hood according to the data fed back by these sensors to optimize the gas collection effect.

[0022] Furthermore, the gas collecting hood is a circular retractable structure. The range and shape of the gas escaping from hot springs vary. The circular retractable gas collecting hood can be flexibly adjusted according to the size of the hot spring eye and the actual area where the gas escapes. For example, in some small hot spring eyes, the gas collecting hood can be shrunk to a smaller size to tightly cover the eye, collect the escaping gas to the greatest extent, and reduce the loss of gas. In the hot spring area with a larger area, the gas collecting hood can be unfolded to expand the collection range, ensure comprehensive collection of gas, and improve the representativeness and accuracy of the detection.

[0023] Furthermore, an impurity filter is provided at the air inlet end of the gas collecting hood. The gas escaping from the hot spring may be mixed with various impurities, such as sand and gravel particles, plant debris, etc. The impurity filter can effectively intercept these impurities and prevent them from entering the subsequent buffer bottle, gas flow detector, constant volume gas storage chamber, and online gas detector and other components. If impurities enter the gas path system, they may wear out the precision parts inside the instrument, such as the sensor and valve of the gas flow detector, resulting in damage to the detection device or inaccurate detection results.

[0024] A spiral condenser is arranged inside the buffer bottle to increase the contact area and contact time between the gas and the condenser and improve the condensation efficiency. The condenser is made of metal materials with good thermal conductivity, such as copper or aluminum, to accelerate heat transfer and condense the water vapor in the gas into liquid water more quickly. A structure with oil-water separation function is designed at the bottom of the buffer bottle, which can not only effectively separate the condensed water from the gas, but also preliminarily purify the condensed water. The purified condensed water can be collected through a special pipeline and used for other purposes, such as landscape irrigation in hot spring scenic spots, to achieve the recycling of water resources. In addition, a pressure sensor can be installed on the buffer bottle to monitor the air pressure in the buffer bottle in real time; when the air pressure is too high, the central controller can control the valve at the outlet end of the buffer bottle to open appropriately, release part of the gas, and prevent damage to subsequent equipment due to excessive pressure. At the same time, when the pressure in the buffer bottle is too low, the collection speed of the gas collection hood can be appropriately adjusted or other measures can be taken to ensure that the gas flows into the buffer bottle stably.

[0025] Optionally, the constant volume gas storage chamber includes a plurality of gas storage units, and the plurality of gas storage units are connected to each other through an electric control valve gas path; the central controller is electrically connected to the plurality of electric control valves respectively, and controls the opening or closing of the plurality of electric control valves according to the flow rate of gas escaping from the hot spring.

[0026] In addition, multiple gas composition monitoring points at different heights are set up in the constant-volume gas storage chamber. By installing small gas sensors, the changes in gas composition at different levels in the gas storage chamber are monitored in real time. This helps to discover whether there is stratification of the gas during the storage process, as well as the distribution pattern of gases with different components, providing a basis for more accurate analysis of the characteristics of hot spring escaping gases.

[0027] Furthermore, a pressure sensor, a temperature sensor and a humidity sensor are provided inside the constant volume gas storage chamber; the pressure sensor, the temperature sensor and the humidity sensor are respectively connected to the central controller in data communication; the central controller receives the pressure detection data, the temperature detection data, the humidity detection data inside the constant volume gas storage chamber and the hot spring escaping gas detection data of the online gas detector, and calibrates the hot spring escaping gas detection data based on the pressure detection data, the temperature detection data and the humidity detection data.

[0028] The pressure sensor in the constant volume gas storage chamber is not only used to measure the pressure of the gas escaping from the hot springs in the gas storage chamber, but also indirectly reflects the stress state in the earth's crust. Before an earthquake occurs, the stress of the rocks in the earth's crust will change, and this stress change may affect the flow and pressure of the gas escaping from the hot springs. When the crustal rocks are squeezed or stretched, the pressure of the underground fluid (including the gas escaping from the hot springs) will change. Although the pressure sensor measures the pressure of the gas in the gas storage chamber, through long-term monitoring and data analysis, its correlation with the change in crustal stress can be found. For example, if the pressure rises or falls abnormally, and this change trend exceeds the normal fluctuation range, it may indicate an abnormal change in crustal stress, which may be one of the precursors of seismic activity.

[0029] The temperature of the gas escaping from the hot spring inside the constant volume gas storage chamber measured by the temperature sensor may be closely related to the geothermal activity underground. During the earthquake gestation process, the friction, fracture and material migration of rocks in the crust will generate heat, which may cause the temperature of the underground hot water system to change, thereby affecting the temperature of the gas escaping from the hot spring. When an earthquake is approaching, abnormal fluctuations in the temperature of the gas escaping from the hot spring may occur. The temperature sensor can monitor this fluctuation and provide a possible reference indicator for earthquake prediction. For example, a sudden increase or a continuous abnormal increase in temperature may be due to micro-fractures or frictional heat generation in underground rocks, which are often closely related to seismic activity.

[0030] The humidity changes monitored by the humidity sensor reflect the water vapor content in the gas escaping from the hot spring, and the water vapor content is related to the underground water-rock interaction. During the earthquake gestation process, the increase in microcracks in the rock will cause more water to participate in the interaction with the rock, which in turn affects the humidity of the gas escaping from the hot spring. When an earthquake is about to occur, the deformation and fracture of the underground rock will change the distribution and flow of groundwater, thereby affecting the water vapor content in the gas escaping from the hot spring. The humidity sensor can capture such subtle changes and provide auxiliary information for earthquake prediction. For example, a sudden increase or decrease in humidity may suggest that the hydrodynamic conditions of the underground rock have changed, which may be a signal of a change in the state of the rock in the crust.

[0031] The central controller receives data from pressure sensors, temperature sensors, humidity sensors, and online gas detectors, providing multi-dimensional data support for earthquake prediction, and comprehensively analyzing these data instead of looking at changes in a single parameter in isolation. For example, when the central controller finds that pressure, temperature, and humidity change abnormally at the same time, and these abnormal changes show a certain trend, it may indicate the coming of an earthquake. For example, a drop in pressure, an increase in temperature, and an increase in humidity may be due to new micro-fractures in underground rocks, resulting in changes in the flow and distribution of gases and liquids. This comprehensive change pattern may be an important sign of seismic activity.

[0032] In earthquake prediction, data accuracy is crucial. The central controller calibrates the detection data of hot spring escaping gas, taking into account the effects of pressure, temperature and humidity, which helps to improve the reliability of the data. For example, different temperature and pressure conditions will affect the measurement results of the physical and chemical properties and composition of the gas. If calibration is not performed, changes in gas composition may be misjudged, thus affecting the prediction of earthquakes. Through calibration, data measured under different conditions can be converted into more comparable and accurate data, and abnormal changes in gas composition and physical properties that are truly caused by earthquakes can be more clearly identified, rather than normal fluctuations caused by changes in environmental conditions.

[0033] In a specific implementation of an embodiment of the present invention, a real-time example of calibrating hot spring escape gas detection data based on pressure detection data, temperature detection data, and humidity detection data is provided. The specific process is as follows: Data preparation stage: For a period of time (such as 1-2 weeks), continuously record the data of the pressure, temperature, and humidity sensors in the constant volume gas storage room, as well as the detection data of common gas components (such as carbon dioxide, oxygen, nitrogen, hydrogen sulfide, etc.) by the online gas detector, and use high-precision standard detection equipment to synchronously detect the gas escaping from the hot spring to obtain standard data. Analyze the data recorded in the early stage, find out the influence of pressure, temperature, and humidity on the detection data of each gas component, and determine the corresponding influence coefficient. For example, through linear regression analysis, it can be found that for every unit change in pressure, the change in the detection value of a certain gas component; for every 1°C increase in temperature, the change ratio of the detection value of a certain gas component, etc.

[0034] Data calibration phase: Step 1: Use pressure sensors, temperature sensors and humidity sensors to collect real-time data on pressure (P), temperature (T) and humidity (H) in the constant volume gas storage chamber, and transmit these data to the central controller. The online gas detector simultaneously detects the concentration data of each component in the hot spring escaping gas ( ), and also sends data to the central controller.

[0035] Step 2: The central controller determines the pressure influence coefficient ( ), pressure calibration is performed on the original detected concentration of each gas component.

[0036] The pressure calibration formula is: ; in, is the concentration after pressure calibration, is the standard pressure (usually the average value of the local atmospheric pressure).

[0037] Step 3: Use the temperature influence coefficient determined earlier ( ), perform temperature calibration on the concentration after pressure calibration.

[0038] The temperature calibration formula is: ; in, is the concentration after temperature correction, is the standard temperature (such as 25°C).

[0039] Step 4: According to the humidity influence coefficient ( ), humidity calibration is performed on the concentration after temperature calibration.

[0040] The calibration formula is: ; in, is the gas component concentration after final calibration.

[0041] Finally, the central controller organizes and stores the final calibrated gas composition concentration data, and can also display the data in a visual manner, such as generating tables and charts.

[0042] In addition, the gas emitted from hot springs should be tested regularly (e.g. monthly) using standard testing equipment, and the test results should be compared with the calibrated data to evaluate the accuracy of the calibration method. If a large deviation is found between the calibration results and the standard test results, the influence of pressure, temperature, and humidity on the test data should be re-analyzed, and the influence coefficient should be updated to ensure the effectiveness and accuracy of the calibration method.

[0043] Furthermore, the constant volume gas storage chamber is also equipped with multiple safety protection measures such as over-temperature protection and over-current protection. When the temperature in the gas storage chamber exceeds the safety threshold or the gas flow is abnormally large, the corresponding protection mechanism is automatically activated, such as turning on the heat dissipation device, cutting off the gas inflow, etc., to ensure the safe operation of the gas storage chamber.

[0044] Specifically, the constant pressure detection valve uses a pressure sensor and a valve drive mechanism to achieve high-precision control of gas pressure. The valve opening can be adjusted in real time according to the pressure difference between the constant volume gas storage chamber and the online gas detector to ensure that the gas pressure entering the online gas detector is always stable within the preset threshold range, thereby improving the accuracy and repeatability of the detection results. In addition to controlling the pressure, the constant pressure detection valve can also coordinate the gas flow according to the optimal working flow range of the online gas detector. Through the built-in flow sensor and control algorithm, when the gas flow is detected to deviate from the optimal range, the valve opening is automatically adjusted so that the flow and pressure meet the detection requirements at the same time. The constant pressure detection valve supports remote control function. The operator can monitor the working status of the valve in real time through the central controller or remote terminal equipment, including parameters such as valve opening, pressure, and flow, and can remotely open, close, and adjust the valve. At the same time, the valve has a fault diagnosis function, which can automatically detect its own faults and send detailed fault information to the central controller for timely repair and maintenance.

[0045] The online gas detector uses a variety of gas detection technologies, such as gas chromatography, infrared spectroscopy, mass spectrometry, etc., to conduct a comprehensive and accurate analysis of the various components in the hot spring escaping gas. Each detection technology has its unique advantages and scope of application. Through the integration of multiple technologies, the sensitivity, selectivity and accuracy of detection can be improved, and more types of gas components, including some trace and trace gases, can be detected. The online gas detector can collect and analyze the composition and concentration data of the hot spring escaping gas in real time, and display these data in real time on the display interface of the central controller in various forms such as graphics and digitization. At the same time, the built-in data analysis software can process and analyze the detection data in real time, such as calculating the changing trend of gas composition, concentration fluctuation range, etc., to provide users with more intuitive and valuable information. In addition, the online gas detector also uses advanced sensor technology and signal processing algorithms to improve the response speed of the online gas detector, and can respond quickly to the composition changes of the hot spring escaping gas in a short time. At the same time, by optimizing the detection process and data processing algorithm, shortening the detection cycle, and improving the detection efficiency, the device can obtain the latest information of the hot spring escaping gas in a more timely manner.

[0046] The central controller can not only monitor and control each component in real time, but also has intelligent decision-making functions. By comprehensively analyzing the various data collected, such as gas flow, pressure, composition, temperature, humidity, etc., combined with preset rules and algorithms, the operating parameters of the device are automatically adjusted to optimize the detection process and improve the accuracy and reliability of the detection. The central controller has a built-in large-capacity data storage device, which can store a large amount of data generated during the detection process for a long time. At the same time, it is equipped with a complete data management system to classify, archive, retrieve and other operations on the stored data, so that users can query and call historical data at any time. In addition, it also supports data backup and recovery functions to ensure the security and integrity of the data. The central controller has powerful remote communication functions and connects to remote terminal devices or cloud platforms through wired or wireless communication methods such as Ethernet, Wi-Fi, 4G / 5G, etc. Users can remotely access the central controller anytime and anywhere through mobile phones, tablets, computers and other devices to view the detection data and control the operation status of the device in real time. At the same time, the detection data is uploaded to the cloud platform to realize data sharing and remote analysis, which is convenient for collaboration and communication between multiple users and multiple departments.

[0047] Furthermore, the hot spring escaping gas concentration and flow constant pressure online detection device also includes: a gas circuit one-way valve, which is arranged in series in the pipeline between the gas flow detector and the constant volume gas storage chamber. The gas circuit one-way valve is a valve that only allows gas to flow in one direction. In this device, it allows gas to flow from the gas flow detector to the constant volume gas storage chamber, but prevents gas from flowing in the opposite direction, preventing the gas in the constant volume gas storage chamber from flowing back to the gas flow detector. Because the gas flow detector is used to measure the gas flow, if there is gas reflux, it will interfere with the accuracy of the measurement, resulting in deviations in the measurement results, and unable to truly reflect the actual flow of the hot spring escaping gas. The stability of the gas circuit system of the entire detection device is ensured by setting a gas circuit one-way valve. By preventing the backflow of gas, it is possible to avoid adverse effects such as pressure fluctuations on other components (such as constant volume gas storage chambers, online gas detectors, etc.) caused by unstable airflow, ensuring that each component can work normally, thereby improving the reliability and stability of the detection results of the entire detection device.

[0048] Specifically, a one-way drain port is provided at the bottom of the buffer bottle, and the one-way drain port is used to drain the condensed water accumulated at the bottom of the buffer bottle. The one-way drain port is located at the bottom of the buffer bottle, and its function is to discharge the condensed water accumulated at the bottom of the buffer bottle in time. The one-way drain port only allows the condensed water to be discharged, while preventing external air or other impurities from entering the buffer bottle. If there is no one-way drain port, the condensed water will continue to accumulate in the buffer bottle, which will not only occupy space and affect the buffering and condensation effect of the buffer bottle on the gas, but may also be brought back into the gas path when the airflow fluctuates, affecting the accuracy of subsequent test results.

[0049] Furthermore, the hot spring escaping gas concentration and flow constant pressure online detection device also includes: a drying chamber, which is arranged in series at the gas outlet of the buffer bottle to dry the hot spring escaping gas. Although the buffer bottle can achieve preliminary condensation, there may still be a small amount of water vapor remaining in the gas. For accurate gas composition and concentration detection, the presence of moisture may interfere with the detection results. For example, for some gas detection methods based on chemical reactions or optical principles, moisture may participate in the reaction or change the optical path, resulting in deviations in the detection data. The drying chamber usually uses a desiccant to absorb moisture. Desiccant, such as silica gel, molecular sieve, etc., has a large specific surface area and strong water absorption, and can efficiently absorb residual moisture in the gas. Some drying chambers may also adopt the condensation drying principle, by further reducing the gas temperature, so that the remaining water vapor is condensed into liquid water and then separated. After being processed by the drying chamber, the moisture content of the gas entering the subsequent constant volume gas storage chamber and the online gas detector is greatly reduced, ensuring that the detection device can more accurately detect the composition and concentration of the hot spring escaping gas.

[0050] Furthermore, a gas composition prediction and detection component is provided in the constant volume gas storage chamber, and the gas composition pre-detection component is electrically connected to the central controller; the central controller receives the gas composition abnormality detection signal of the gas composition prediction and detection component, and controls the online gas detector to perform corresponding detection.

[0051] The gas composition prediction and detection component can use spectral analysis technology to make a preliminary analysis of the composition of the gas escaping from the hot spring by utilizing the absorption or scattering characteristics of different gas molecules in a specific spectral range. For example, different gas molecules will have different absorption peaks in the near-infrared spectral region. By analyzing the position and intensity of these absorption peaks, it is possible to preliminarily determine which components are contained in the gas. It has the advantages of being fast, non-contact, and non-destructive, and can quickly provide preliminary composition information after the gas enters the constant volume gas storage chamber. Optionally, an electrochemical sensor array or thermal conductivity detection technology can also be used.

[0052] After the central controller receives the gas composition anomaly detection signal from the gas composition prediction detection component, it will conduct an in-depth analysis of these signals, compare the current gas composition anomaly with historical data, and consider the time factor to find characteristic patterns that may be related to seismic activity. For example, analyze the short-term and long-term change trends of radon gas concentrations. If the radon gas concentration increases abnormally in a short period of time, and this increase lasts for a period of time, rather than normal periodic fluctuations, this may be a signal that an earthquake is about to occur. For abnormal signals of multiple gas components, the central controller will conduct a comprehensive analysis. For example, observe the changes in the concentrations of radon, carbon dioxide, and methane at the same time, and analyze the laws of coordinated changes. Before some earthquakes, there may be an increase in radon gas concentrations, and the concentrations of carbon dioxide and methane also show specific change patterns. The central controller can find the potential correlation between these abnormal signals and seismic activity by establishing a multivariate analysis model.

[0053] The present invention realizes a high degree of linkage and collaborative work between various components through the unified coordination of the central controller. For example, when the gas collection hood detects a sudden increase in gas flow, the central controller will automatically adjust the gas outlet speed of the buffer bottle, the measurement range of the gas flow detector, the volume of the constant volume gas storage chamber, and the opening of the constant pressure detection valve, etc., to ensure that the entire system can operate stably and adapt to the detection requirements under different working conditions; it also realizes a fully automated detection process, from gas collection, pretreatment, flow monitoring, gas storage, constant pressure control to component detection, without manual intervention; the user only needs to set the detection parameters and operation mode on the central controller, and the device can automatically operate according to the preset program, greatly improving the detection efficiency and work convenience.

[0054] In addition, the detection device also has a complete fault diagnosis and emergency response mechanism. When a component fails, the central controller can quickly locate the fault location and automatically take corresponding emergency measures according to the type of fault, such as starting backup equipment, adjusting the detection process, sending alarm information, etc., to ensure that the device can still maintain a certain operating capacity in the event of a fault and reduce the impact on the detection work.

[0055] Accordingly, please refer to Figure 2 The second aspect of the embodiment of the present invention provides a method for online detection of hot spring escaping gas concentration and flow constant pressure, which detects hot spring escaping gas based on an online detection device for hot spring escaping gas concentration and flow constant pressure, including the following steps: Step S100, collecting the escaping gas from the hot spring based on the gas collecting hood, and introducing the escaping gas from the hot spring into a buffer bottle for drying treatment.

[0056] The gas collection hood is placed in the corresponding area of ​​the hot spring escaping gas. Its main task is to collect as much gas as possible from the hot spring. Due to its special design, such as the circular retractable structure, it can flexibly adapt to the gas escape situation in different hot spring areas to ensure efficient collection. The collected gas is then introduced into the buffer bottle. On the one hand, the buffer bottle plays the role of buffering the airflow to make the gas flow smoother. On the other hand, its internal structure and environment can allow the water vapor in the hot spring escaping gas to condense when it is cooled. The one-way drain port at the bottom discharges the liquid water formed by condensation, preliminarily realizing the drying treatment of the hot spring escaping gas, preparing for the subsequent more accurate detection link.

[0057] Step S200, based on the gas flow detector, detects the flow data of the hot spring escaping gas after the drying process, and imports it into the constant volume gas storage chamber.

[0058] The hot spring escaping gas that has been initially dried by the buffer bottle then enters the gas flow detector. The gas flow detector accurately measures the gas flow rate and generates corresponding flow data through specific detection principles, such as thermal type, differential pressure type, etc. These data are of great significance for understanding the dynamic changes of hot spring escaping gas and evaluating the activity of hot springs. The gas after the flow rate is detected is introduced into the constant volume gas storage chamber for temporary storage. The existence of the constant volume gas storage chamber ensures that the gas accumulates in a stable space, providing a stable gas source for subsequent detection, and also facilitates centralized management and control of the gas. The setting of the gas path one-way valve ensures that the gas can only flow into the constant volume gas storage chamber in one direction, preventing the gas backflow from interfering with the flow detection results or affecting the stability of the system.

[0059] Step S300, when the pressure value of the hot spring escaping gas stored in the constant volume gas storage chamber is greater than the preset pressure threshold, it enters the online gas detector through the constant pressure detection valve.

[0060] The pressure sensor installed in the constant volume gas storage chamber monitors the pressure value of the stored gas in real time. When the pressure value gradually rises and exceeds the preset pressure threshold, it indicates that enough gas has accumulated in the gas storage chamber and the appropriate pressure conditions are met for the next step of detection. At this time, the constant pressure detection valve is opened, and the gas in the gas storage chamber enters the online gas detector through the valve under constant pressure. The design of the constant pressure detection valve is crucial, as it ensures the stability of the gas pressure entering the online gas detector, because pressure fluctuations may affect the accuracy of the detection results, especially for some pressure-sensitive detection technologies.

[0061] Step S400, detecting the gas composition and concentration of the gas escaping from the hot spring based on the online gas detector, and sending the detection result to the central controller.

[0062] The online gas detector uses a variety of advanced detection technologies, such as spectral analysis and chromatographic analysis, to conduct comprehensive composition and concentration detection of the incoming hot spring escaping gas. By analyzing the absorption of light of a specific wavelength by the gas and the separation of different components in the chromatographic column, the types and contents of various components in the gas can be accurately determined. After the detection is completed, the online gas detector will quickly send the test results to the central controller. After receiving the data, the central controller will further analyze, process, store and display the data. For example, the test results are calibrated based on the pressure, temperature, humidity and other data of the constant volume gas storage chamber, so as to obtain a more accurate and reliable analysis report of the hot spring escaping gas, providing strong data support for subsequent research, development or management.

[0063] The embodiment of the present invention aims to protect an online constant-pressure detection device and method for the concentration and flow of hot spring escaping gas, wherein the device includes: a gas collecting hood, a buffer bottle, a gas flow detector, a constant-volume gas storage chamber, a constant-pressure detection valve, an online gas detector and a central controller; the gas collecting hood is arranged in the corresponding area of ​​the hot spring escaping gas to collect the hot spring escaping gas; the gas inlet end of the buffer bottle is connected to the gas collecting hood pipeline, and its gas outlet end is connected to the gas inlet end pipeline of the constant-volume gas storage chamber through a gas flow detector; the constant-volume gas storage chamber is connected to the online gas detector pipeline through a constant-pressure detection valve, and when the pressure value of the hot spring escaping gas stored in the constant-volume gas storage chamber is greater than a preset pressure threshold, it enters the online gas detector through the constant-pressure detection valve; the online gas detector detects the gas composition and concentration of the hot spring escaping gas, and sends the detection data to the central controller. The above technical scheme has the following effects: 1. The gas escaping from the hot spring is collected in a constant volume gas storage chamber. When the gas pressure reaches the preset threshold, the constant pressure detection valve opens to deliver the gas to the online gas detector at a stable pressure, ensuring that the online gas detector can continuously and stably obtain test samples, avoiding detection errors or interruptions caused by unstable gas supply, and maintaining the smooth operation of the detection process.

[0064] 2. The composition and concentration of the gas escaping from the hot spring are measured based on the online gas detector. Before the gas enters the detector, the constant volume gas storage chamber provides data to the central controller through the internal pressure, temperature and humidity sensors to calibrate the test results. The constant pressure detection valve ensures the stability of the gas pressure entering the online gas detector, eliminates the interference of pressure, temperature, humidity and other factors on the detection, ensures the accuracy and reliability of the output data of the online gas detector, and provides solid data support for the study of hot spring gas characteristics; 3. Through the gas composition prediction and detection component set in the constant volume gas storage chamber, after monitoring the abnormal gas composition, a signal will be sent to the central controller, thereby triggering the online gas detector to perform targeted detection.

[0065] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A constant pressure online detection device for hot spring escaping gas concentration and flow rate, characterized in that: include: Gas collecting hood, buffer bottle, gas flow detector, constant volume gas storage chamber, constant pressure detection valve, online gas detector and central controller; The gas collecting hood is arranged in the corresponding area of ​​the hot spring escaping gas to collect the hot spring escaping gas; The gas inlet end of the buffer bottle is connected to the gas collecting hood pipeline, and the gas outlet end thereof is connected to the gas inlet end pipeline of the constant volume gas storage chamber through the gas flow detector; The constant volume gas storage chamber is connected to the online gas detector pipeline through the constant pressure detection valve. When the pressure value of the hot spring escaped gas stored in the constant volume gas storage chamber is greater than the preset pressure threshold, the gas enters the online gas detector through the constant pressure detection valve; The online gas detector detects the gas composition and concentration of the gas escaping from the hot spring, and sends the detection data to the central controller.

2. The constant pressure online detection device for hot spring escaping gas concentration and flow rate according to claim 1 is characterized in that: Also includes: A gas circuit one-way valve is arranged in series in the pipeline between the gas flow detector and the constant volume gas storage chamber.

3. The constant pressure online detection device for hot spring escaping gas concentration and flow rate according to claim 1 is characterized in that: A one-way drain port is provided at the bottom of the buffer bottle, and the one-way drain port is used to drain condensed water accumulated at the bottom of the buffer bottle.

4. The constant pressure online detection device for hot spring escaping gas concentration and flow rate according to claim 1 is characterized in that: The gas collecting hood is a circular retractable structure.

5. The constant pressure online detection device for hot spring escaping gas concentration and flow rate according to claim 4 is characterized in that: An impurity filter is provided at the air inlet end of the air collecting hood.

6. The constant pressure online detection device for hot spring escaping gas concentration and flow rate according to claim 1 is characterized in that: Also includes: A drying chamber is arranged in series at the gas outlet end of the buffer bottle to dry the gas escaping from the hot spring.

7. The constant pressure online detection device for hot spring escaping gas concentration and flow rate according to claim 1 is characterized in that: A pressure sensor, a temperature sensor and a humidity sensor are arranged inside the constant volume air storage chamber; The pressure sensor, temperature sensor and humidity sensor are respectively in data communication with the central controller; The central controller receives the pressure detection data, temperature detection data, humidity detection data inside the constant volume gas storage chamber and the hot spring escaping gas detection data of the online gas detector, and calibrates the hot spring escaping gas detection data based on the pressure detection data, temperature detection data, and humidity detection data.

8. The constant pressure online detection device for hot spring escaping gas concentration and flow rate according to claim 1 is characterized in that: The constant volume gas storage chamber includes a plurality of gas storage units, and the plurality of gas storage units are connected to each other through an electric control valve gas path; The central controller is electrically connected to a plurality of electrically controlled valves respectively, and controls the opening or closing of the plurality of electrically controlled valves according to the flow rate of the gas escaping from the hot spring.

9. The constant pressure online detection device for hot spring escaping gas concentration and flow rate according to any one of claims 1 to 8, characterized in that: A gas composition prediction and detection component is provided in the constant volume gas storage chamber, and the gas composition pre-detection component is electrically connected to the central controller; The central controller receives the gas composition abnormality detection signal from the gas composition prediction and detection component, and controls the online gas detector to perform corresponding detection.

10. A method for online constant pressure detection of hot spring escaping gas concentration and flow rate, characterized in that: The hot spring escaping gas is detected based on the hot spring escaping gas concentration and flow constant pressure online detection device as described in any one of claims 1 to 9, comprising the following steps: The hot spring escaping gas is collected based on a gas collecting hood, and the hot spring escaping gas is introduced into a buffer bottle for drying; The gas flow detector detects the flow data of the hot spring escaping gas after drying and imports it into a constant volume gas storage chamber; When the pressure value of the hot spring escaping gas stored in the constant volume gas storage chamber is greater than the preset pressure threshold, the gas enters the online gas detector through the constant pressure detection valve; The gas composition and concentration of the gas escaping from the hot spring are detected based on the online gas detector, and the detection result is sent to the central controller.

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