CN210322885U - Quick sampling and analyzing device for soil gas in aeration zone - Google Patents
Quick sampling and analyzing device for soil gas in aeration zone Download PDFInfo
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- CN210322885U CN210322885U CN201920841581.XU CN201920841581U CN210322885U CN 210322885 U CN210322885 U CN 210322885U CN 201920841581 U CN201920841581 U CN 201920841581U CN 210322885 U CN210322885 U CN 210322885U
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Abstract
The utility model discloses a fast sampling and analyzing device for soil gas in aeration zone, which comprises a sampling module, a PID fast detection module, a dilution module, a GC-MS online real-time detection module and a control analysis module; the sampling module samples underground volatile organic compound gas, and sends the underground volatile organic compound gas into the PID fast detection module through a pipeline for detection, if the concentration is higher than the measurement limit of the GC-MS online real-time detection module, the gas concentration is diluted through the dilution module to be in line with the measurement range of the GC-MS online real-time detection module, and then the gas is sent into the GC-MS online real-time detection module for detection; otherwise, directly sending the obtained product into a GC-MS online real-time detection module for detection; the GC-MS online real-time detection module carries out qualitative and quantitative analysis on the sent gas and sends the measurement result to the control analysis module to form a three-dimensional space distribution map of different pollution factors.
Description
Technical Field
The utility model relates to a quick sampling analysis device of aeration zone soil gas belongs to soil investigation sample technical field.
Background
At present, the conventional investigation technology of volatile organic pollutants in soil in an aeration zone is obviously influenced by environmental and weather factors such as temperature, soil water content, atmospheric pressure and the like, and the concentration difference of the volatile organic pollutants in the soil gas in an investigation result even reaches hundreds of times, so that the development of the aeration zone soil gas quick device has important significance for reducing the influence of climate and environmental influence on the concentration of the volatile organic pollutants in the soil gas and quickly and accurately acquiring the pollution condition of a soil pollution site. In addition, the pollution investigation of volatile organic pollutants in the soil of the polluted site adopts a conventional method of sampling on site, storing and transferring the samples to a laboratory for detection. The detection period is long, the sample storage time is short, and the storage condition requirement is high; according to the membrane interface sampling equipment in the current market, volatile organic pollutants permeate a reaction membrane to be rapidly detected by heating to about 120 ℃, and the method only promotes the precipitation of organic pollutants in soil by a heating method, so that the precipitation efficiency of the organic pollutants is limited; in addition, the mature technology MIP technology in the market does not have the rapid pollution factor for qualitative and quantitative analysis, only provides the detection results of PID and FID, cannot distinguish the pollution factor and the corresponding pollution concentration in real time, so that the field investigation cannot adjust the sampling scheme in real time, the sampling scheme can be modified according to the secondary or even multiple results of the final result of the laboratory, the complex process of multiple-time approach, sampling and detection is realized, and the defects of time waste, high cost and the like are overcome.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to prior art not enough, provide a quick sampling analytical equipment of aeration zone soil gas to overcome the defect that current contaminated site investigation technique is wasted time and energy, with high costs, the effect is low and environment and weather influence are big etc.
In order to solve the technical problem, the utility model discloses the technical scheme who takes as follows:
a fast sampling and analyzing device for soil gas in an aeration zone comprises a sampling module, a PID fast detection module, a dilution module, a GC-MS online real-time detection module and a control analysis module;
the sampling module, the PID rapid detection module, the dilution module and the GC-MS online real-time detection module are sequentially connected and are respectively and independently connected with the control analysis module, and the operation of each module is controlled by the control analysis module;
the sampling module samples underground volatile organic compound gas and sends the underground volatile organic compound gas into the PID fast detection module through a pipeline for detection, if the concentration is higher than the measurement limit of the GC-MS online real-time detection module, the gas concentration is diluted to be in line with the measurement range of the GC-MS online real-time detection module through the dilution module, and then the gas is sent into the GC-MS online real-time detection module for detection; otherwise, directly sending the obtained product into a GC-MS online real-time detection module for detection; the GC-MS online real-time detection module carries out qualitative and quantitative analysis on the sent gas and sends the measurement result to the control analysis module.
Specifically, the sampling module includes gas production drill bit, gas production pipe, the gas production drill bit is connected with PID short-term test module through gas production pipe, collects underground volatile organic compounds gas through the gas production drill bit and sends into PID short-term test module and detects.
The PID rapid detection module comprises a three-way joint, a first electromagnetic valve and a PID detector; one end of the three-way joint is connected with the sampling module, the other end of the three-way joint is connected with the PID detector through a first electromagnetic valve, and the other end of the three-way joint is connected with the diluting module; the first electromagnetic valve and the PID detector are respectively connected with the control analysis module, the control analysis module controls the opening and closing of the first electromagnetic valve, the PID detector is a detector with ppb and ppm concentration levels, real-time online detection is achieved, semi-quantitative detection is conducted on organic pollutants in gas, and measurement data are sent to the control analysis module.
The diluting module comprises a mixing pipe, a second electromagnetic valve, a nitrogen cylinder, a flow meter and a sapphire flow restrictor; the mixing tube is connected with the PID rapid detection module through a sapphire current limiter, the other end of the mixing tube is connected with the nitrogen cylinder through a second electromagnetic valve, and one end of the mixing tube is connected to the GC-MS online real-time detection module; the flow meter is positioned between the second electromagnetic valve and the nitrogen cylinder and is used for monitoring and controlling the amount of nitrogen entering the mixing pipe from the nitrogen cylinder; the second electromagnetic valve and the flowmeter are respectively connected with the control analysis module, the control analysis module controls the opening and closing of the second electromagnetic valve, and the flowmeter measurement data are sent to the control analysis module.
The GC-MS online real-time detection module comprises a portable GC-MS, wherein an air inlet of the portable GC-MS is connected with one end of a mixing pipe of the dilution module, qualitative and quantitative analysis is carried out on gas sent from the mixing pipe, and a measurement result is sent to the control analysis module.
The control analysis module comprises a mobile terminal which is respectively connected with the sampling module, the PID rapid detection module, the dilution module and the GC-MS online real-time detection module and controls the operation and signal transmission of each module.
Furthermore, the gas production drill bit comprises a drill bit, a soil gas collection side hole, a heating assembly, a thermocouple, a sampling pipe, a power supply and a data wire; the drill bit is positioned at the bottommost part, a closed sampling chamber is arranged above the drill bit, the soil gas collecting side hole is formed in the side wall of the sampling chamber, a sampling pipe at the top of the sampling chamber is connected with a gas production pipe, the soil gas with aeration zone is collected by the soil gas collecting side hole, and then the underground volatile organic compound gas is produced after being collected by the sampling pipe; the heating assembly is arranged above the sampling chamber and arranged around the sampling pipe, and the thermocouple is positioned between the heating assembly and the sampling pipe; the heating assembly and the thermocouple are connected with the temperature controller through a power supply and a data line, so that heating and temperature control of soil are realized, and the soil is heated to a specified temperature to promote volatile organic compound gas to be separated out from the soil; the temperature controller is connected with the control analysis module.
Preferably, the top of the sampling pipe is provided with a pagoda head which is connected with a gas production pipe through the pagoda head.
Has the advantages that:
1. the device can rapidly collect the gas in the aeration zone soil, and the sampling device has a heating module, simple structure, small volume, easy operation and high collection efficiency of organic matters; the semi-quantitative detection of PID values in the soil gas is realized, the concentration level of pollutants in the soil gas is grasped, the dilution multiple is determined, and the condition that the subsequent GC-MS instrument column is protected due to overhigh concentration is prevented.
2. The utility model discloses the device realizes the real-time qualitative and quantitative analysis of pollution factor through the GC-MS analysis appearance, through control analysis module, realizes the visual of the spatial distribution of pollutant in aeration zone soil.
Drawings
These and/or other advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings and the following detailed description.
Fig. 1 is a schematic view of the overall structure of the device of the present invention.
Fig. 2 is the schematic view of the local structure of the gas production drill of the present invention.
Fig. 3 is the concentration distribution diagram of the PID organic pollutant in a certain pollution site detected by the device of the utility model.
Fig. 4 is a space distribution diagram of o-xylene in a certain polluted site detected by the device of the utility model.
Wherein each reference numeral represents: i, a sampling module; 1-1 gas production drill bit; 1, drilling a bit; 2 collecting side holes for soil gas; 3 heating the assembly; 4, a thermocouple; 5, sampling tube; 6, a pagoda head; 7 power and data lines; 1-2 quartz sand layers; 1-3 bentonite layer; 1-4 gas production pipes; 1-5 temperature controllers; II, a PID rapid detection module; 2-1 three-way joint; 2-2 a first solenoid valve; 2-3PID detectors; III, diluting the module; 3-1 mixing tube; 3-2 second electromagnetic valve b; 3-3 nitrogen gas cylinder; 3-4 flow meter; 3-5 sapphire current limiters; IV, a GC-MS online real-time detection module; 4-1 convenient GC-MS; v, controlling an analysis module; 5-1 mobile terminal.
Detailed Description
The invention will be better understood from the following examples.
The drawings in the specification show the structure, ratio, size, etc. only for the purpose of matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and not for the purpose of limiting the present invention, so the present invention does not have the essential meaning in the art, and any structure modification, ratio relationship change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and achievable purpose of the present invention. Meanwhile, the terms "upper", "lower", "front", "rear", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.
As shown in figure 1, the fast sampling and analyzing device for the enclosed air zone soil gas comprises a sampling module I, a PID fast detection module II, a dilution module III, a GC-MS online real-time detection module IV and a control analysis module V.
The sampling module I, the PID rapid detection module II, the dilution module III and the GC-MS online real-time detection module IV are sequentially connected and are respectively and independently connected with the control analysis module V, and the operation of each module is controlled by the control analysis module V.
The sampling module I samples underground volatile organic compound gas, and sends the underground volatile organic compound gas into a PID rapid detection module II through a pipeline for detection, if the concentration is higher than the measurement limit of a GC-MS online real-time detection module IV, the gas concentration is diluted through a dilution module III to a measurement range which accords with the GC-MS online real-time detection module IV, and then the gas is sent into the GC-MS online real-time detection module IV for detection; otherwise, directly sending the obtained product into a GC-MS online real-time detection module IV for detection; and the GC-MS online real-time detection module IV carries out qualitative and quantitative analysis on the sent gas and sends the measurement result to the control analysis module V to form a three-dimensional space distribution map of different pollution factors.
The sampling module I comprises a gas production drill bit 1-1 and a gas production pipe 1-4, the gas production drill bit 1-1 is connected with the PID rapid detection module II through the gas production pipe 1-4, and underground volatile organic gas is collected through the gas production drill bit 1-1 and is sent into the PID rapid detection module II for detection.
The PID rapid detection module II comprises a three-way joint 2-1, a first electromagnetic valve 2-2 and a PID detector 2-3; one end of the three-way joint 2-1 is connected with a gas production pipe 1-4 of the sampling module I, the other end of the three-way joint is connected with a PID detector 2-3 through a first electromagnetic valve 2-2, and the other end of the three-way joint is connected with a mixing pipe 3-1 of the dilution module III; the first electromagnetic valve 2-2 and the PID detector 2-3 are respectively connected with the control analysis module V, the control analysis module V controls the opening and closing of the first electromagnetic valve 2-2, and the PID detector 2-3 sends the measured data to the control analysis module V for analysis.
The dilution module III comprises a mixing pipe 3-1, a second electromagnetic valve 3-2, a nitrogen cylinder 3-3, a flow meter 3-4 and a sapphire flow restrictor 3-5; the mixing pipe 3-1 is connected with a three-way joint 2-1 of a PID rapid detection module II through a sapphire current limiter 3-5, the other end of the mixing pipe is connected with a nitrogen cylinder 3-3 through a second electromagnetic valve 3-2, and one end of the mixing pipe is connected to a GC-MS online real-time detection module IV; the flow meter 3-4 is positioned between the second electromagnetic valve 3-2 and the nitrogen gas cylinder 3-3 and is used for monitoring the amount of nitrogen gas entering the mixing pipe 3-1 from the nitrogen gas cylinder 3-3; the second electromagnetic valve 3-2 and the flow meter 3-4 are respectively connected with the control analysis module V, the control analysis module V controls the second electromagnetic valve 3-2 to be opened and closed, and the measurement data of the flow meter 3-4 are sent to the control analysis module V for analysis.
The GC-MS online real-time detection module IV comprises a portable GC-MS4-1, wherein a gas inlet of the portable GC-MS4-1 is connected with one end of a mixing pipe 3-1 of a dilution module III, qualitative and quantitative analysis is carried out on gas sent from the mixing pipe 3-1, and a measurement result is sent to a control analysis module V.
The control analysis module V comprises a mobile terminal 5-1 which is respectively connected with a temperature controller 1-5, a first electromagnetic valve 2-2, a PID detector 2-3, a second electromagnetic valve 3-2, a flowmeter 3-4 and a portable GC-MS4-1 to control the operation and signal transmission of each module.
As shown in fig. 2, the gas production drill bit 1-1 comprises a drill bit 1, a soil gas collecting side hole 2, a heating component 3, a thermocouple 4, a sampling pipe 5 and a power supply and data line 7; the drill bit 1 is positioned at the bottommost part, a closed sampling chamber is arranged above the drill bit 1, the soil gas acquisition side hole 2 is formed in the side wall of the sampling chamber, and a sampling pipe 5 at the top of the sampling chamber is connected with gas production pipes 1-4 through a pagoda head 6 to produce underground volatile organic gas; the heating assembly 3 is arranged above the sampling chamber and arranged around the sampling pipe 5, and the thermocouple 4 is positioned between the heating assembly 3 and the sampling pipe 5; the heating component 3 and the thermocouple 4 are connected with temperature controllers 1-5 through a power supply and a data wire 7, and the temperature controllers 1-5 are connected with a control analysis module V.
In a pollution investigation project of a certain polluted site, the rapid detection device for the soil organic pollutant factor is applied to carry out organic pollution soil pollutant factor detection and mapping on organic pollutants in 1 m soil of the site.
The method comprises the following specific steps:
the method comprises the following steps: building a sampling soil gas well, and standing for more than 24 hours after well flushing;
step two: starting the mobile terminal 5-1 to control the power supply of the instrument;
step three: opening a nitrogen cylinder 3-3 in the diluting module to supply gas for the automatic diluting module;
step four: starting the heating component 3 until the temperature is stabilized at about 120 ℃;
step five: opening a first electromagnetic valve 2-2, starting a PID detector 2-3, detecting the concentration of the organic pollutants, and determining the dilution times;
step six: opening a second electromagnetic valve 3-2, and diluting to meet the detection requirement of the portable GC-MS 4-1;
step seven: opening a portable GC-MS to carry out qualitative and quantitative detection on the pollutants;
step eight: the portable GC-MS sends the measurement data to the mobile terminal, and the mobile terminal forms a three-dimensional distribution map of organic pollution in a three-dimensional space of a polluted site after analysis and processing.
PID (figure 3) shows that the concentration of organic pollutants is 22-4800 ppm, the dilution times of the organic pollutants are 100 times at points 5, 8, 9, 35 and the like, the dilution times of the organic pollutants are 10 times at points 4, 7, 10, 17, 36, 37, 41 and the like, other points are not diluted, and the spatial distribution of o-xylene is measured after GC-MS detection and is shown in figure 4.
The utility model provides a thought and method of borduring area soil gas quick sampling analytical equipment specifically realize this technical scheme's method and approach many, above only the utility model discloses a preferred embodiment should point out, to the ordinary technical personnel of this technical field, not deviating from the utility model discloses under the prerequisite of principle, can also make a plurality of improvements and moist decorations, these improve and moist decorations should also be regarded as the utility model discloses a protection scope. All the components not specified in the present embodiment can be realized by the prior art.
Claims (8)
1. A fast sampling and analyzing device for soil gas in an aeration zone is characterized by comprising a sampling module (I), a PID fast detection module (II), a dilution module (III), a GC-MS online real-time detection module (IV) and a control analysis module (V);
the sampling module (I), the PID rapid detection module (II), the dilution module (III) and the GC-MS online real-time detection module (IV) are sequentially connected and are respectively and independently connected with the control analysis module (V);
the sampling module (I) samples underground volatile organic compound gas, and sends the underground volatile organic compound gas into the PID fast detection module (II) through a pipeline for detection, if the concentration is higher than the measurement limit of the GC-MS online real-time detection module (IV), the gas concentration is diluted to the measurement range which accords with the GC-MS online real-time detection module (IV) through the dilution module (III), and then the gas concentration is sent into the GC-MS online real-time detection module (IV) for detection; otherwise, directly sending the obtained product into a GC-MS online real-time detection module (IV) for detection; and the GC-MS online real-time detection module (IV) carries out qualitative and quantitative analysis on the sent gas and sends the measurement result to the control analysis module (V).
2. The aeration zone soil gas rapid sampling analysis device according to claim 1, wherein the sampling module (I) comprises an air production drill bit (1-1) and an air production pipe (1-4), the air production drill bit (1-1) is connected with the PID rapid detection module (II) through the air production pipe (1-4), and underground volatile organic gas is collected through the air production drill bit (1-1) and sent into the PID rapid detection module (II) for detection.
3. The enclosed belt soil gas rapid sampling and analyzing device according to claim 1, wherein said PID rapid detection module (II) comprises a three-way joint (2-1), a first electromagnetic valve (2-2), a PID detector (2-3); one end of the three-way joint (2-1) is connected with the sampling module (I), the other end of the three-way joint is connected with the PID detector (2-3) through the first electromagnetic valve (2-2), and the other end of the three-way joint is connected with the dilution module (III); the first electromagnetic valve (2-2) and the PID detector (2-3) are respectively connected with the control analysis module (V), the control analysis module (V) controls the opening and closing of the first electromagnetic valve (2-2), and the PID detector (2-3) sends measurement data to the control analysis module (V).
4. The rapid sampling and analysis device for enclosed soil gas according to claim 1, characterized in that said dilution module (iii) comprises a mixing tube (3-1), a second solenoid valve (3-2), a nitrogen gas cylinder (3-3), a flow meter (3-4), and a sapphire flow restrictor (3-5); the mixing pipe (3-1) is connected with a PID rapid detection module (II) through a sapphire current limiter (3-5), the other end of the mixing pipe is connected with a nitrogen cylinder (3-3) through a second electromagnetic valve (3-2), and one end of the mixing pipe is connected to a GC-MS online real-time detection module (IV); the flow meter (3-4) is positioned between the second electromagnetic valve (3-2) and the nitrogen gas bottle (3-3) and is used for monitoring the amount of nitrogen gas entering the mixing pipe (3-1) from the nitrogen gas bottle (3-3); the second electromagnetic valve (3-2) and the flow meter (3-4) are respectively connected with the control analysis module (V), the control analysis module (V) controls the opening and closing of the second electromagnetic valve (3-2), and the flow meter (3-4) sends measurement data to the control analysis module (V).
5. The enclosed-atmosphere soil gas rapid sampling and analyzing device according to claim 4, wherein the GC-MS online real-time detection module (IV) comprises a portable GC-MS (4-1), the gas inlet of which is connected with one end of the mixing pipe (3-1) of the dilution module (III), and the gas fed from the mixing pipe (3-1) is analyzed qualitatively and quantitatively, and the measurement result is sent to the control analysis module (V).
6. The enclosed-atmosphere soil gas rapid sampling and analyzing device according to claim 1, wherein the control and analysis module (V) comprises a mobile terminal (5-1) which is connected with the sampling module (I), the PID rapid detection module (II), the dilution module (III) and the GC-MS online real-time detection module (IV) respectively to control the operation and signal transmission of each module.
7. The enclosed belt soil gas rapid sampling and analyzing device according to claim 2, wherein the gas sampling drill bit (1-1) comprises a drill bit (1), a soil gas collecting side hole (2), a heating component (3), a thermocouple (4), a sampling pipe (5) and a power and data line (7); the drill bit (1) is positioned at the bottommost part, a closed sampling chamber is arranged above the drill bit, the soil gas acquisition side hole (2) is formed in the side wall of the sampling chamber, and a sampling pipe (5) at the top of the sampling chamber is connected with gas production pipes (1-4) to produce underground volatile organic gas; the heating assembly (3) is arranged above the sampling chamber and surrounds the sampling pipe (5), and the thermocouple (4) is positioned between the heating assembly (3) and the sampling pipe (5); the heating component (3) and the thermocouple (4) are connected with temperature control instruments (1-5) through power supply and data lines (7), and the temperature control instruments (1-5) are connected with a control analysis module (V).
8. The enclosed atmosphere soil gas rapid sampling and analyzing device according to claim 7, wherein the top of the sampling tube (5) is provided with a pagoda head (6) which is connected with the gas production tube (1-4) through the pagoda head (6).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082423A (en) * | 2019-06-05 | 2019-08-02 | 江苏省环境科学研究院 | A kind of aerated zone soil gas quick sampling analytical equipment |
| CN112903858A (en) * | 2021-01-25 | 2021-06-04 | 江苏省环境科学研究院 | Quick detection device of soil organic pollutant |
| CN115541303A (en) * | 2022-08-04 | 2022-12-30 | 安徽省生态环境科学研究院 | Pollute plot soil and water monitored control system |
| RU2803211C1 (en) * | 2023-04-14 | 2023-09-11 | Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - Газпром ВНИИГАЗ" | Thermal jacket |
-
2019
- 2019-06-05 CN CN201920841581.XU patent/CN210322885U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082423A (en) * | 2019-06-05 | 2019-08-02 | 江苏省环境科学研究院 | A kind of aerated zone soil gas quick sampling analytical equipment |
| CN110082423B (en) * | 2019-06-05 | 2024-03-19 | 江苏省环境科学研究院 | Quick sampling analysis device for soil gas in gas-coated zone |
| CN112903858A (en) * | 2021-01-25 | 2021-06-04 | 江苏省环境科学研究院 | Quick detection device of soil organic pollutant |
| CN115541303A (en) * | 2022-08-04 | 2022-12-30 | 安徽省生态环境科学研究院 | Pollute plot soil and water monitored control system |
| RU2803211C1 (en) * | 2023-04-14 | 2023-09-11 | Общество с ограниченной ответственностью "Научно-исследовательский институт природных газов и газовых технологий - Газпром ВНИИГАЗ" | Thermal jacket |
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