83 results about "Soil gas" patented technology

The invention relates to the technical field of orchard planting, in particular to an orchard intelligent gas explosion deep scarification fertilizer applicator which comprises a supporting table used for supporting a device body, a protective frame is mounted at the top of the supporting table, and a gas pressure controller used for soil gas explosion deep scarification and an automatic driving control controller are mounted in the protective frame. By arranging the fertilizing mechanism, the device can sow seeds while loosening soil through gas explosion, the gas pressure of a gas storage tank is controlled through a gas pressure controller, when the seeds move into a through pipe from a feeding pipe, the seeds slide directionally due to the arrangement of a wedge-shaped surface, and the position of a gas outlet plate is adjusted through an electric push rod; the multiple sealing blocks form a closed space for the partition plate area, the multiple limiting blocks divide the seeds in the multiple through pipes in a limited mode, and the multiple air outlets correspond to the multiple feeding holes, so that air impact acting force is released to the seeds, the seeds can be released through the discharging holes, and meanwhile the loosening effect can be generated on internal soil.

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.

A backwater valve cover configured to prevent a backwater valve opening from releasing toxic soil gases into a home includes a base and a lid. The base is configured to be installed above a backwater valve. The base includes a central access opening, a first plurality of fastener holes configured to accept a first plurality of fasteners, and a second plurality of fastener holes configured to accept a second plurality of fasteners. The lid is configured to cover the central access opening and be fastened to the base via the second plurality of fasteners.

Provided herein are devices and systems that can be used to measure subsurface gas concentrations in order to inform users about the soil health. Also provided herein are methods of using these devices and systems to measure the subsurface concentration of one or more gases present in the soil.

The application relates to the technical field of soil gas collection, and particularly discloses an in-situ soil profile gas collection device which comprises an inner pipe, a pipe body and a strip-shaped belt. The pipe body comprises an exposed end and an inserted end, the inner pipe is located in the inner cavity of the pipe body, one end of the inner pipe is detachably connected with the inner wall of the pipe body close to the inserted end, the inner wall of the inner pipe is connected with one end of a supporting rod, the outer circumferential side of the strip-shaped belt is equidistantly provided with not less than three elastic rings, the inner diameter of the strip-shaped belt is larger than the outer diameter of the inner pipe, the strip-shaped belt is sleeved on the inner pipe, each elastic ring is clamped on the outer circumferential side of the inner pipe, and the pipe body is provided with a pulling assembly for driving one end of the strip-shaped belt to move. The technical scheme of the example of the application realizes in-situ collection of soil profile nitrous oxide gas, is suitable for long-time measurement of nitrous oxide, and has smaller interference with the surface microclimate.

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 utility model provides a soil VOC (volatile organic compound) monitoring and sampling system, which belongs to the technical field of VOC monitoring and sampling, and comprises a sampling module, an adsorption module, a conveying module and a control module, the adsorption module is provided with a temperature control assembly for cooling and heating the soil gas; the conveying module is communicated between the sampling module and the control module and is provided with a first channel and a second channel, and only the second channel is communicated with the temperature control assembly; when the to-be-detected parameter of the soil gas is higher than a preset value, the control module closes the second channel, and at the moment, the soil gas enters the control module through the first channel; when the to-be-detected parameter of the soil gas is lower than or equal to a preset value, the control module closes the first channel, and at the moment, the soil gas enters the control module through the second channel. According to the utility model, the accuracy of the monitoring result is improved when the VOC concentration in the soil gas is low.

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 pollutant detection, in particular to a movable while-drilling soil gas detection system and a wide concentration range detection method.The movable while-drilling soil gas detection system comprises a movable platform, a detection device and a control device, and the movable platform comprises a loading platform and driving wheels connected to the loading platform; and the drilling part is carried on the loading platform. An inert gas compensation mechanism is introduced, the proportion of inert gas of the sample introduction system is dynamically adjusted, the flow of a high-concentration sample is diluted, and the concentration of pollutants at an inlet of the detection module is reduced through the gas dilution module arranged in the sample introduction module, so that the effective detection range of the detection module is expanded, and a low-detection-limit detector can be selected; on the premise of not losing the sensitivity of a low-concentration sample, high-concentration signal overload is inhibited, continuous detection of pollutants in a wide concentration range is realized, both trace identification and high-concentration anti-saturation capability are considered, and the analysis applicability of a complex polluted site is remarkably improved.

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.

This application discloses a method for controlling groundwater using a gas barrier and its injection device, relating to the technical field of cast-in-place pile construction. The method for controlling groundwater using a gas barrier includes the following steps: S1. Arranging multiple small-diameter injection pipes around the area where groundwater needs to be controlled, each of the injection pipes having multiple injection holes on its side wall, a filter ring fixed to the outer wall of each injection pipe, and a spike fixed to the bottom of each injection pipe; S2. Using an injection device to inject inert gas into the ground through the injection pipes; S3. Controlling the injection pressure and flow rate to continuously inject and form a stable gas barrier; S4. Using a formation detection instrument to monitor the distribution of soil gas concentration, monitor the formation of the gas barrier, and adjust the injection parameters; S5. Performing post-maintenance after the gas barrier is formed to control the groundwater level. This application can effectively lower the groundwater level around the pile hole.

The invention discloses a deep soil CO2 real-time monitoring device and an operation method thereof, and belongs to the technical field of soil gas test devices, the device comprises a CO2 sensor, a sensor shell, a peristaltic pump, a gas transmission pipe, a gas cylinder filter screen, a gas collection cylinder, a power supply, a power line, a data transmission line and an LED display screen. Meanwhile, the invention further discloses an operation method of the device for monitoring the CO2 in the deep soil in real time. The device for real-time monitoring of CO2 in deep soil provided by the invention can collect CO2 in soil at different depths and monitor data in real time through the CO2 sensor, so that the quantity of CO2 gas discharged from the soil at different depths can be accurately obtained, the difficulty and defects of traditional deep soil CO2 measurement are overcome, and the real-time monitoring of CO2 in deep soil is realized. And compared with the existing device, the device has the characteristics of high data acquisition frequency, high measurement precision, convenience in installation and the like, and is suitable for popularization and application.

The utility model provides a soil VOC (Volatile Organic Compounds) online monitor which comprises a shell, a sampling module, a monitoring module, a control module, an adsorption module, a conveying module and a power supply module, the sampling module is used for being inserted into soil to collect soil gas; the monitoring module is used for detecting the concentration of a soil gas component; the adsorption module is provided with a temperature control part for cooling and heating soil gas; the conveying module is provided with an air inlet pipe communicated with the sampling module, a breather pipe communicated with the temperature control part and the control module, an air guide pipe communicated with the control module and the monitoring module, and an air outlet pipe communicated with the outside of the shell and the monitoring module; the air inlet pipe is provided with a first flow dividing pipe communicated with the control module and a second flow dividing pipe communicated with the temperature control part, and the control module is used for controlling opening and closing of the first flow dividing pipe and the ventilation pipe; an air pump is mounted on the air outlet pipe; the power supply module is used for supplying power. The utility model has the effect of high accuracy.

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 application discloses a static box for collecting soil gas, which comprises a ground box, a middle box and a top box which are sequentially abutted, one end of the middle box is fixed with a first insertion pipe, the inside of the top box is divided into an installation cavity and a gas collecting cavity, one end of the top box is fixed with a second insertion pipe, the sealing element comprises annular groove bodies filled with sealing liquid, the annular groove bodies are respectively fixed with the ground box and the middle box, the first insertion pipe and the second insertion pipe can be inserted into the annular groove bodies, a balloon is limited in the gas collecting cavity, an air pump is communicated with the balloon, and an air outlet pipe is communicated with the gas collecting cavity. The annular groove bodies are filled with the sealing liquid, the ground box and the middle box, and the middle box and the top box can be reliably sealed through the arrangement of the annular groove bodies, the first insertion pipe and the second insertion pipe, the air pump, the balloon and the one-way valve are arranged, and when the static box is used for collecting gas, the external air cannot enter the static box and dilute the gas to be detected in the static box.

A system for determining soil gas properties includes a vacuum pump configured to draw soil gas through an air inlet; a gas sensor for measuring gas concentration levels in the soil gas passing through the system; a GPS unit for determining the location of the system; and a controller configured to map measurements from at least one gas sensor relative to the location of the system. The method for determining the soil properties includes drawing a gas sample from the soil through the air inlet; transmitting the gas sample to at least one gas sensor; measuring the gas concentration in the gas sample with the at least one gas sensor; transmitting the measured gas concentration to the controller; determining the location of the air inlet with the GPS unit; transmitting the location to the controller; and mapping the measured gas concentration using the location.

Apparatus, systems and methods for soil gas sampling are disclosed. The apparatus may include a first outer surface formed from a rigid liquid-impermeable and gas-impermeable material, and a second outer surface formed from an aquaphobic and gas-permeable membrane, where an edge of the second outer surface is attached to the first edge of the first surface, the first outer surface and the second outer surface entirely enclose an inner volume, and the second outer surface comprises a high specific surface area surface. The apparatus may further include a quantity of porous absorbing material, at least partially filling the inner volume, configured to preferentially absorb gaseous analytes.

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.

Apparatus, systems and methods for soil gas sampling are disclosed. The apparatus may include a first outer surface formed from a rigid liquid-impermeable and gas-impermeable material, and a second outer surface formed from an aquaphobic and gas-permeable membrane, where an edge of the second outer surface is attached to the first edge of the first surface, the first outer surface and the second outer surface entirely enclose an inner volume, and the second outer surface comprises a high specific surface area surface. The apparatus may further include a quantity of porous absorbing material, at least partially filling the inner volume, configured to preferentially absorb gaseous analytes.

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.