51 results about "Soil gas" patented technology

The invention discloses a multi-parameter shallow gas detection method which comprises the following steps: S1, self-adaptive sensing network layout and multi-parameter synchronous acquisition: monitoring nodes synchronously acquire underground electrical parameters, soil gas composition and concentration, soil mechanics and pore pressure parameters and an environmental noise background value; accessing a hydro-meteorological data stream of the target area in real time; s2, multi-source interference signal identification and data purification: obtaining a purified multi-parameter data sequence reflecting real geological anomalies; s3, water-gas-force coupling dynamic modeling and migration simulation: outputting a shallow gas migration risk thermodynamic diagram; s4, intelligent diagnosis based on transfer learning and causal discovery: performing time sequence analysis on the purified multi-parameter data sequence, and identifying a gas reservoir core area, a dominant migration channel and dominant control factors influencing gas aggregation and migration; and S5, dynamic risk assessment and graded early warning: quantitatively calculating the risk probability.

The invention relates to the technical field of soil and groundwater pollution remediation, in particular to a polluted groundwater source controlling and breaking system suitable for limited space of an industrial accumulation area, which comprises a main well, a gas stripping circulating unit and a groundwater circulating unit. A blocking device composed of a packing rubber structure and a driving device is arranged in the main well, the packing rubber structure is driven by the driving device to move and intermittently inject air to expand, and an air flow channel which is dynamically opened and closed is formed between the inner wall of the main well and the unsaturated area. The vacuum pump device builds negative pressure on the upper portion of the main well, so that purified clean gas enters an unsaturated area in an intermittent pulse mode through the peripheral injection well, and soil gas is induced to flow in an oscillating mode under cooperation of the dynamic gas flow channel. Groundwater extracted by the centrifugal pump is purified by the gas stripping area and the underground activated carbon filtering device and then is discharged into the top of the unsaturated area through the drainage device in an intermittent wave mode, the system is suitable for pollution treatment in the limited space of the industrial accumulation area, and targeted source control and long-acting reduction are achieved.

The invention relates to the technical field of data monitoring, in particular to a soil gas online monitoring method and system for a municipal road construction site, and the method comprises the steps: obtaining a feature vector through analyzing the correlation between soil gas concentration data at any depth in each time period at all collection moments and various meteorological data, evaluating the similarity of the feature vectors between any depth and all other depths, and determining a similarity coefficient so as to screen out a feature time period; and determining a depth characteristic value by analyzing time and space distribution characteristics of the soil gas concentration so as to screen out a noisy moment, and correcting the soil gas concentration data at the noisy moment. According to the method, the soil gas concentration data influenced by noise is corrected by combining the distribution characteristics of the soil gas concentration, so that the precision and accuracy of multi-depth soil gas monitoring of the highway construction site are improved.

The application discloses an automatic gas geochemical exploration equipment and an automatic measurement method, wherein the equipment comprises a double-gas-path drill bit, an exploration mechanism and a microcontroller; the double-gas-path drill bit comprises independent gas inlet and outlet gas paths; the exploration mechanism comprises a first exploration channel, a second exploration channel and a microcontroller; the first exploration channel is provided with an electrically-controlled gas valve connected with the microcontroller; the second exploration channel comprises a sensor container and a gas pump; the sensor container is provided with a plurality of parallel sensors connected with the microcontroller; one end of the sensor container is communicated with the outlet gas path, and the other end of the sensor container is connected with the gas pump; the gas pump is connected with the microcontroller and an external gas collecting device; and the microcontroller is wirelessly connected with an external intelligent terminal. The application can realize automatic exploration and automatic recording of soil gas, improve the exploration work efficiency and reduce the influence of personnel operation errors on exploration data results.

The invention discloses a tectonic geochemical earthquake precursor anomaly discrimination index extraction method and device, and the method comprises the steps: obtaining monitoring data of a monitored target fault zone, carrying out the analysis of the monitoring data based on a tectonic geochemical method, determining the cross-fault soil gas spatio-temporal evolution characteristic data of the monitored target fault zone, and carrying out the analysis of the cross-fault soil gas spatio-temporal evolution characteristic data of the monitored target fault zone. And according to the monitored cross-fault soil gas spatio-temporal evolution characteristic data of the target fault zone and the response change relationship of the cross-fault soil gas concentration intensity of the fault zone to the earthquake, extracting an earthquake precursor anomaly discrimination index. Monitoring data of a target fault zone are analyzed based on a tectonic geochemical method, and then the fault zone is analyzed according to the analyzed cross-fault soil gas spatio-temporal evolution data and the response change relation of the cross-fault soil gas concentration intensity of the fault zone to an earthquake, which is obtained through a solid body earthquake-inducing mode. According to the invention, data quantification of the earthquake precursor anomaly discrimination index can be realized, the problem that only the earthquake precursor anomaly index can be qualitatively researched at present is solved, and the accuracy of earthquake prediction is improved.

This invention relates to the field of soil environmental monitoring technology, and in particular discloses a sampling device for simultaneously collecting in-situ soil solutions and gases. The device comprises a support frame unit, a sampling device installed within the support frame unit, a drive device installed on the support frame unit, and a controller for controlling the drive device and the sampling device. The sampling device includes an aperture opener for drilling, a collector for simultaneously collecting soil solutions and gases from the drilled hole, and a gas-liquid separation unit for separating the collected solutions and gases. This device is a complete sampling system that not only reduces equipment costs and improves sampling efficiency, but also ensures the correlation and accuracy of synchronous, in-situ sampling data. By simultaneously, in-situ, and isolatedly collecting soil solutions and soil gases from the same borehole and at the same depth, it avoids cross-contamination and atmospheric interference, significantly improving sampling efficiency and data comparability, and providing a reliable technical means for research on multi-media soil environments.

The invention relates to the technical field of soil environment monitoring, and particularly discloses a sampling device for synchronously collecting solution and gas in in-situ soil, which is provided with a support frame unit, a sampling device arranged in the support frame unit, a driving device arranged on the support frame unit and a controller for controlling and connecting the driving device and the sampling device. The sampling device comprises a tapper used for tapping, a collector used for simultaneously collecting a soil solution and gas from the tapped hole and a gas-liquid separation unit used for separating the collected solution and gas, and the device is a set of sampling system, so that the equipment cost is reduced, the sampling efficiency is improved, and the sampling time is shortened. The relevance and accuracy of synchronous and in-situ sampling data are ensured; through synchronous, in-situ and isolated collection of the soil solution and the soil gas in the same drill hole and the same depth, cross contamination and atmospheric interference are avoided, the sampling efficiency and the data comparability are remarkably improved, and a reliable technical means is provided for soil multi-medium environment research.

A gaseous substance collection system that can be used on extraterrestrial celestial bodies is envisaged for collecting target gaseous atoms and molecules that float in a shielded environment at a pressure equal to or less than 1 * 10-5 bar. The shielded environment is defined within a cover placed on top of the granular soil, and in one embodiment, the granular soil is a weathered layer. The cover includes a cover body extending from an edge to a top of the cover. The shielding environment is not communicated with the external environment through the cover body. The mining device further comprises a blade, a heat source and a gas collecting face. A blade extends from the edge and is configured to penetrate particulate soil. A heat source disposed in the cover is configured to heat particulate soil. The gas collection face is disposed in the shielded environment and is configured to maintain a temperature below 100 DEG Kelvin.

The application provides a soil gas monitoring device integrated with a biosensor, comprising a biosensor module, a soil gas monitoring module, a solar self-powered system, a soil gas sampling module, a sensor cooperative working mechanism and a data processing technology, and is suitable for real-time monitoring of soil gas of an organic pollution site and other soil gas containing volatile organic pollutants. The application combines a biosensor technology, can selectively identify and detect specific organic compounds in soil, has the characteristics of rapid response, high sensitivity and simple operation, and is suitable for soil gas VOCs detection in modern agriculture and environmental monitoring.

Monitoring equipment for carbon content emission of soil gas is characterized in that a sealing partition plate is arranged in a working barrel, a soil storage box located below the sealing partition plate is arranged at the bottom of an inner cavity of the working barrel, a soil sampling assembly is arranged in a vertical section of a material guiding pipe, and a first-stage filter screen is located below a second-stage filter screen; the hollow threaded sleeve is arranged on the outer wall of the vertical fixing rod in a sleeving mode, and the rotary smashing shaft is arranged on the outer wall of the hollow threaded sleeve in a sleeving mode and provided with a plurality of soil smashing rods. According to the invention, at the sampling front end, the whole soil sampling assembly is embedded into the vertical section of the material guide pipe, and the rotary crushing shaft rotates spontaneously under the flow impact of soil particles to drive the soil crushing rod to dynamically crush aggregates, so that the blockage is effectively prevented, and the sample uniformity is improved; the hollow threaded sleeve is matched with the up-down stretching damping rod and the two-stage filter screen to form an elastic floating supporting structure, and stable operation can be maintained without damage when the elastic floating supporting structure faces complex soil containing stones or root systems.

This utility model relates to a soil remediation monitoring system with landscape effects. Above the soil area to be remediated, a clay layer, a barrier layer for water and air isolation, another clay layer, a gravel layer, and a planting soil layer are sequentially arranged. The planting soil layer is used for landscaping. A groundwater monitoring well is vertically buried along the planting soil layer, extending downwards into the soil layer of the soil area to be remediated. The groundwater monitoring well has filter holes within a height range corresponding to the barrier layer. A soil gas monitoring well is also vertically buried along the planting soil layer, extending downwards into the gravel layer. This utility model, by laying clay, a barrier layer, a gravel layer, and a planting soil layer above the soil to be remediated, avoids contamination of the planting soil by the soil to be remediated, creating conditions for landscaping in the soil area to be remediated. By planting landscaping through the planting soil layer, the system benefits the soil during soil remediation and enhances its aesthetics.

The invention belongs to the technical field of soil gas sampling, and particularly relates to geological soil sampling equipment for land reserve, which comprises a sampling cylinder, the sampling cylinder is hollow, the bottom wall of the sampling cylinder is coaxially and fixedly connected with a connecting pipe, and the bottom wall of the connecting pipe is coaxially and fixedly connected with a drill bit. A pushing plate is longitudinally and slidably connected to the inner circumferential wall of the sampling cylinder, the hollow part of the sampling cylinder is divided into an upper cavity and a lower cavity by the pushing plate, and a sealing air bag is coaxially and fixedly connected to the upper end of the outer circumferential wall of the sampling cylinder; the sampling barrel is flushed by inert gas, waste gas is discharged under pushing, force can be stored during flushing, resetting is completed by stored force after flushing is completed, and during resetting, the sealing air bag expands to block the top end of the sampling hole, so that external air is prevented from entering the sampling hole to interfere with sampling gas, air in a soil layer is slowly extracted, and timely blocking is performed after sampling is completed; the sampled gas is prevented from being contacted with the external environment.

A gas logging system may include a data logger comprising an enclosure, a processor, and memory. The processor and the memory may be configured to log data associated with soil. The gas logging system may further include a set of probes. A probe of the set of probes may include a sensor enclosure, at least one gas sensor configured to provide the data associated with the soil to the processor and the memory, a gas-permeable water-impermeable membrane, a solid-state dehumidifying membrane, and a fan.

The utility model provides a device for simulating root system secretion and soil gas collection, which comprises a culture device with soil inside; an opening is formed in the bottom of the gas collecting device; the base is connected with the bottom of the gas collecting device; a root system simulation unit is arranged in the culture device, at least part of the root system simulation unit is buried in soil, and the root system simulation unit discharges secretions into the soil; the gas collection device is buckled on the culture device through the opening, a gas collection channel is arranged at the top of the gas collection device and is used for collecting gas in the culture device, and the structure is used for simulating the physical constraint and chemical microenvironment of a root system in real soil and collecting secreta gas of the root system and gas generated by activity of soil microorganisms; the limitation that a traditional device can only collect or release liquid secretions is solved.

The invention discloses a TDLAS (tunable diode laser absorption spectroscopy) technology-based optical fiber coupling type soil COaverage concentration measurement method, which belongs to the technical field of soil gas monitoring, and comprises the following steps: S1, arranging a sampling pipeline; s2, constructing an optical system; s3, carrying out gas balance and spectrum acquisition; step S4, average concentration inversion: the data processing module analyzes the acquired transmission spectrum signal based on the Lambert-Beer law, calculates the integral concentration of the COgas in the sampling pipeline, and inverts the COaverage concentration at the target soil depth in combination with the length of the sampling pipeline to obtain the COaverage concentration at the target soil depth. By adopting the horizontal long-optical-path sampling design, the spatial average concentration of the COs in the soil at the target depth can be effectively obtained, and the problem of insufficient representativeness of single-point sampling is avoided; the optical fiber transmission mode reduces the environmental interference, improves the measurement stability, and is suitable for long-term and in-situ soil CO concentration monitoring.

The application discloses a method for detecting a petroleum hydrocarbon soil pollution plume, and is suitable for a polluted site, especially a service site pollution plume sketching. The application realizes preliminary sketching of a petroleum hydrocarbon pollution plume by coupling a high-density resistance method with a portable modular soil gas stratified sampling method. The portable modular soil gas stratified sampling method uses a portable modular soil gas stratified sampling device to perform stratum sampling, and sets an air inlet interval protection device. When the air inlet interval protection device is not opened, the air inlet interval protection device is in a non-breathable state. Only when the air inlet interval protection device is opened, the air inlet interval protection device has air inlet conditions. The method guarantees sampling accuracy, and has the advantages of low price, high efficiency and improved efficiency.

The invention provides a soil hydrogen content in-situ gas sampling device and a gas sampling method, and relates to the technical field of soil gas collection. The device comprises a base, a pile casing, a drill rod, a sealing cylinder, an isolating cylinder and a driving structure, a ventilation pipeline is arranged in the drill rod and used for directly collecting soil gas in the drilling process. A storage cavity is formed between the protective cylinder and the isolation cylinder, external miscellaneous gas is prevented from entering a sampling hole to interfere with sampling gas, in-situ gas collection with measurement while drilling or fixed-point depth gas collection can be achieved through the structure, and dissipation or pollution of gas in the transfer process is reduced; in-situ collection of soil gas is realized, and the primitiveness and authenticity of a gas sample are maintained to the greatest extent, so that the accuracy of detection data is improved.

The invention relates to the technical field of detection, in particular to a soil N2O gas determination method capable of eliminating acetylene interference, which comprises the following steps: (1) circumferentially coating filter paper along the inner wall of a sample introduction bottle to form a reaction interface, and dipping the filter paper in an alkaline oxidant solution to prepare a reaction medium; (2) filling a pipeline with anhydrous calcium sulfate and activated carbon, and adding two-way air valves on the left and right to prepare gas washing pipes; (3) sealing the sample introduction bottle in the step (1) by using a butyl shock insulator, capping and vacuumizing; (4) injecting to-be-detected gas into the sample injection bottle in the step (3), and reacting in a dark place for more than 1 hour; (5) an airtight needle penetrates through the isolation pad of the sample injection bottle in the step (4), and headspace gas is extracted; (6) vacuumizing the gas washing pipe in the step (2), introducing nitrogen to wash for 3 minutes, and connecting one side of the gas washing pipe with a gas chromatography sample inlet; and (7) injecting the headspace gas in the step (5) into the gas washing pipe in the step (6), drying the gas, removing impurities from the gas, and detecting the content of N2O from a sample inlet through gas chromatography.

The invention relates to the field of soil gas collecting equipment, and provides a collecting and testing device for the concentration of hydrogen in soil. The core of the device comprises a steel chisel main body, the steel chisel main body adopts a nested structure of an inner-layer steel core and an outer-layer steel sleeve, a sampling hole is formed in the side wall of the inner-layer steel core, and the outer-layer steel sleeve can axially slide along the inner-layer steel core, so that the functions of closing, shielding and opening exposure of the sampling hole are realized. When the collecting and testing device for the hydrogen concentration in the soil is inserted, the outer-layer steel sleeve is closed to shield the sampling hole, air contact is avoided, the sample purity is improved, and after insertion, the outer-layer steel sleeve is lifted and fixed through the positioning piece, so that smooth sampling is ensured. The device is further provided with an electric drill auxiliary inserting mechanism and a hydraulic auxiliary pulling-out mechanism, the operation labor intensity is greatly reduced, and the device is suitable for soil environments with different hardness. A partition plate is arranged in the inner-layer steel core to realize function division, and a small-size gas guide pipe is adopted to reduce gas loss. The device is compact in structure and convenient to disassemble and assemble, and the applicability, reliability and detection accuracy of the device are integrally improved.

The utility model discloses an automatic soil gas collecting device, which belongs to the technical field of soil gas collection and comprises a collecting box, an inner cavity of the collecting box is divided into an upper gas storage chamber and a lower control chamber by a partition plate, and a sucking pump and a gas collecting box are respectively mounted at the top and the bottom of the inner wall of the control chamber. A strip-shaped groove is formed in the bottom of the collecting box, an inserting part capable of extending towards the side face after being inserted into the ground is rotationally arranged in the strip-shaped groove, and the inserting part is communicated with an inner cavity of the gas collecting box; the inserting part comprises a rotating seat mounted in the strip-shaped groove through a rotating shaft and a gas collecting pipe fixed to one end of the rotating seat, the rotating seat is of a hollow structure, one end of the rotating seat communicates with an inner cavity of the gas collecting box through a telescopic guide pipe, and the gas collecting pipe communicates with an inner cavity of the rotating seat; the automatic soil gas collecting device is novel in structure, convenient to use, wide in collecting range and high in application value.

The invention discloses a device and a method for measuring an effective diffusion coefficient of a volatile PFAS gas phase in soil. The device comprises a humidity control unit, a soil column simulation unit, a tail gas collection unit and a concentration monitoring unit, and the humidity control unit is used for introducing wet air with a stable flow rate into the soil column simulation unit so as to simulate gas exchange and humidity conditions in an actual environment; the soil column simulation unit simulates the whole process that volatile PFAS gas diffuses in soil and migrates to the top space; the tail gas collecting unit ensures effective absorption of tail gas; and the concentration monitoring unit adopts a gas chromatography-mass spectrometry instrument to realize high-sensitivity and accurate quantitative analysis of the low-concentration PFAS soil gas. The device provided by the invention can truly simulate the upward diffusion migration process of volatile PFAS gas from polluted soil, and can calculate the corresponding gas phase effective migration coefficient by combining gas chromatography-mass spectrometry.

A low-cost soil gas-flux monitor provides localized sensors eliminating the need for a tethered analysis unit and permitting flexible sensor locations enabled by wireless and conduit-less interconnectivity. A housing form factor permits a low-power door actuation for venting making the necessary battery operation practical.

This invention discloses a fiber-optic coupled method for measuring the average concentration of CO₂ in soil based on TDLAS technology, belonging to the field of soil gas monitoring technology. The method includes: step S1, sampling pipeline layout; step S2, optical system setup; step S3, gas balance and spectral acquisition; and step S4, average concentration inversion: the data processing module analyzes the acquired transmission spectral signal based on Lambert-Beer's law, calculates the integrated concentration of CO₂ gas in the sampling pipeline, and inverts the average CO₂ concentration at the target soil depth by combining the length of the sampling pipeline. This invention employs a horizontal long-path sampling design, which can effectively obtain the spatial average concentration of CO₂ in the soil at the target depth, avoiding the problem of insufficient representativeness of single-point sampling; the fiber optic transmission method reduces environmental interference and improves measurement stability, making it suitable for long-term, in-situ soil CO₂ concentration monitoring.

The utility model relates to a soil gas collecting column which comprises a cylinder and a circular tube arranged in the cylinder, two circular ring plates are arranged between the cylinder and the circular tube in the vertical direction, and the inner side wall of the cylinder and the outer side wall of the circular tube are fixedly connected in a sealed mode through the circular ring plates. An air inlet communicated with the upper annular plate and the lower annular plate is formed in the outer side wall of the cylinder, an air collecting hole communicated with the upper annular plate and the lower annular plate is formed in the inner side wall of the circular pipe, and an air outlet pipe communicated with the air collecting hole is arranged in the circular pipe. The gas collecting device has the beneficial effect that a worker can conveniently collect gas generated in soil within a certain depth.

The utility model relates to the technical field of a wellbay of a soil gas monitoring well, and particularly discloses a wellbay of a soil gas monitoring well, which comprises a pipeline, a fixing mechanism arranged on the outer side of the pipeline and used for stably fixing the wellbay on the ground, and a sealing mechanism arranged above the fixing mechanism and used for sealing the pipeline. And the pipeline penetrates through the fixing mechanism and is adaptively connected with the sealing mechanism. During use, the supporting base with the height capable of being adjusted through the stud in the fixing mechanism is matched with the supporting arms distributed in the circumferential direction, different ground flatness can be flexibly adapted, repeated construction is avoided, resource waste is reduced, the six sealing plates of the sealing mechanism are driven by hydraulic pressure to synchronously adjust the opening and closing amplitude, and pipelines with different diameters can be adapted; reliable sealing of pipelines of various specifications is achieved, the sealing mechanism can be rapidly opened or closed through hydraulic control, the efficiency of operation such as sampling and equipment maintenance is improved, and standardized and efficient sealing operation on different well platforms is truly achieved.

The utility model provides a double-phase extraction soil and underground water remediation device suitable for in-production enterprises, and by adopting a mode of combining in-situ remediation and ex-situ remediation, soil and underground water can be remedied at the same time. A double-pump extraction system is adopted, a vacuum pump and a pneumatic diaphragm pump are arranged to extract gas and liquid in an underground polluted area respectively, the influence radius is large, the extraction rate can be freely adjusted, and limitation of the extraction depth of a single-pump system is avoided. A two-stage steam-water separator is adopted for ground surface equipment, extracted soil gas is primarily treated, it is guaranteed that gas entering the rear-end activated carbon box body is relatively dry, and the adsorption performance of activated carbon is not affected. The device can realize large-range remediation and treatment of deep polluted soil and underground water on the premise of not influencing surface production activities, and has the advantages of low carbon, environmental protection, small plot disturbance, low construction difficulty, adjustable remediation range and the like, and surface equipment is simple to operate and can stably run for a long time.

The application discloses a device and method for monitoring soil gas composition, which comprises a porous pipeline, a first valve, a second valve and a fluid source storage container; the porous pipeline is used for laying in the soil of a monitoring area, and the pipe wall of the porous pipeline is provided with a plurality of air permeable holes; the first valve is connected between the outlet of the fluid source storage container and the inlet of the porous pipeline; the second valve is arranged at the outlet of the porous pipeline; and the fluid source storage container is used for storing a liquid fluid which can react with soil gas. According to the scheme, the monitoring pipe network can be laid in the soil of the monitoring area by using the porous pipeline, and a large number of monitoring instruments are not needed, and a monitoring well is not needed to be constructed in the monitoring area, so that the monitoring cost is low; and the monitoring area is wide, the pipeline construction cost is low, the porous pipeline can be laid on a large scale and in a large area, the soil gas in a large monitoring area can be monitored by using the porous pipeline without a large cost under the condition of guaranteeing the monitoring demand, and long-term monitoring can be realized.

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.

The utility model relates to the technical field of soil gas collecting devices, and particularly discloses a soil gas collecting device which comprises a support, a collecting module for collecting gas in soil is arranged on the support, a switching module for switching the on-off state and the flow direction of a gas path is arranged in the collecting module, and the switching module regulates and controls the gas path state of the collecting module. When the sampling device is used, the valve core in the switching module is accurately matched with the airtight valve, and a sealing ring is matched to enhance the sealing performance, so that the flow path crosstalk of high-concentration waste gas in a well washing stage can be effectively blocked, the waste gas is prevented from being mixed into a final sample, soil gas is guided to naturally flow to complete sampling by virtue of preset negative pressure of a pipeline, and continuous driving of a pump body is not needed; the stable state of airflow in the sampling process can be always maintained, so that the original composition of the volatile organic compounds is maintained, and the sampling accuracy is guaranteed.