CN210269319U - Layering sampling device for volatile organic pollutants in aeration zone soil gas - Google Patents
Layering sampling device for volatile organic pollutants in aeration zone soil gas Download PDFInfo
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- CN210269319U CN210269319U CN201920822683.7U CN201920822683U CN210269319U CN 210269319 U CN210269319 U CN 210269319U CN 201920822683 U CN201920822683 U CN 201920822683U CN 210269319 U CN210269319 U CN 210269319U
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Abstract
The utility model provides a volatile organic pollutant layering sampling device in aeration zone soil gas, including the vacuum chamber, be equipped with shallow layer gas collection bag and deep gas collection bag in the vacuum chamber, shallow layer gas collection bag and deep gas collection bag communicate respectively the subassembly that admits air, set up the vacuum exhaust tube in the vacuum chamber, the vacuum exhaust tube communicates the vacuum gas sampling pump outward. The air outlet pipe is connected with the vacuum pump, so that the pressure in the vacuum box is negative pressure, and the expansion and sampling of the vacuum bag are realized by means of pressure difference.
Description
Technical Field
The utility model relates to a gaseous sampling field, especially a volatile organic pollutant layering sampling device in aeration zone soil gas.
Background
The method comprises the steps of collecting samples of volatile organic pollutants of soil gas in a field aeration zone, setting the samples to be 1 meter and 2 meters in depth according to the height of a soil underground water level, and setting soil gas production wells about 3 meters or 4 meters even in places with deep underground water levels, so that the collection method of different depths of the field aeration zone is adopted.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims to solve the technical problem that to prior art not enough, provide a volatile organic pollutant layering sampling device in aeration zone soil gas.
In order to solve the technical problem, the utility model provides a volatile organic pollutant layering sampling device in aeration zone soil gas, including the vacuum chamber, be equipped with shallow layer gas collection bag and deep gas collection bag in the vacuum chamber, shallow layer gas collection bag and deep gas collection bag communicate respectively the subassembly that admits air, set up the vacuum exhaust tube in the vacuum chamber, the vacuum exhaust tube communicates the vacuum gas sampling pump outward. The air outlet pipe is connected with the vacuum pump, so that the pressure in the vacuum box is negative pressure, and the expansion and sampling of the vacuum bag are realized by means of pressure difference.
In the utility model, the air inlet component consists of a shallow gas production pipe joint and a deep gas production pipe joint, the shallow gas production pipe is 1.5 cm longer than the deep gas production pipe joint, and the deep gas production pipe is positioned above the shallow gas production pipe; one end of the shallow gas production pipe joint and one end of the deep gas production pipe joint are connected with a pipe orifice of the built soil gas well, the shallow gas production pipe joint of the pipe orifice of the soil gas well is 1.5 cm longer than the deep gas production pipe joint and is just matched with the gas inlet assembly, and sealing is realized through a sealing ring.
In the utility model, the shallow gas production bag is communicated with the shallow gas production pipe, and the shallow gas production pipe is connected with the gas inlet component; the deep gas production bag is communicated with a deep gas production pipe, and the deep gas production pipe is connected with a gas inlet component.
The utility model discloses in, the vacuum chamber is equipped with the baffle, and the baffle separates the vacuum chamber into shallow layer soil gas collection room and deep soil gas collection room, and shallow layer is adopted the air pocket and is arranged in shallow layer soil gas collection room, and deep layer is adopted the air pocket and is arranged in deep soil gas collection room, and shallow layer is adopted the air pocket and is separately discharged from top to bottom with deep gas collection bag, prevents to extrude each other and influences the sampling, realizes shallow layer soil gas and deep while sample.
The utility model discloses in, the vacuum chamber includes the side cap, and vacuum chamber and side cap are fixed sealed through two plane locks, strengthen locking, guarantee that gas-tight not give vent to anger.
The utility model discloses in, the junction of vacuum box and side cap is equipped with the sealing washer, guarantees that vacuum box and side cap junction are airtight not admit air to guarantee that the atmospheric pressure difference that the negative pressure caused in the vacuum takes a sample.
The utility model discloses in, be equipped with the manometer in the vacuum chamber, through pointer reading real-time observation vacuum chamber internal pressure, prevent that the pressure in the soil gas well is too big because acquisition pressure, lead to the destruction of the leakproofness of soil gas well.
The utility model discloses in, be equipped with the first valve with shallow gas production pipe intercommunication on the shallow gas production bag, control shallow gas production bag can admit air and give vent to anger.
The utility model discloses in, be equipped with the second valve with deep gas production pipe intercommunication on the deep gas production bag, control deep gas production bag and can admit air and give vent to anger.
Drawings
These and other advantages of the invention will become apparent from the following more detailed description of the invention, when taken in conjunction with the accompanying drawings and detailed description.
FIG. 1 is a general schematic view;
FIG. 2 is a schematic view of a seal;
FIG. 3 is a schematic view of an intake assembly
FIG. 4 is a graph showing the effect of example 2.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, a stratified sampling device for volatile organic pollutants in aeration zone soil gas comprises a vacuum box 1, a vacuum box 2, a shallow gas collecting bag 3, a deep gas collecting bag 4, a partition plate 5, a gas inlet pipe assembly 6, a gas outlet pipe 7, a sealing ring 8, a groove 9, a plane lock 10, a side cover 11, a pressure gauge 12, a deep gas production pipe 13, a shallow gas production pipe 14, a shallow soil gas collection chamber 15, a deep soil gas collection chamber 16, a sealing gasket 17, a screw fastener 18, a shallow gas production pipe joint 19, a deep gas production pipe joint 20a, a first valve 20b, a second valve 21, a gas outlet pipe 22, a vacuum pump 20b
As shown in fig. 1, a shallow gas collecting bag 2 and a deep gas collecting bag 3 are arranged in a vacuum box 1, the shallow gas collecting bag 2 and the deep gas collecting bag 3 are respectively communicated with a gas inlet component 5, a vacuum pumping pipe 6 is arranged in the vacuum box 1, and the vacuum pumping pipe is externally communicated with a vacuum gas pump. The shallow gas collecting bag 2 is communicated with a shallow gas collecting pipe 13, and the shallow gas collecting pipe 13 is connected with the gas inlet component 5; the deep gas collecting bag 3 is communicated with a deep gas collecting pipe 12, and the deep gas collecting pipe 12 is connected with the gas inlet component 5. The vacuum box is provided with a partition plate 4, the vacuum box 1 is divided into a shallow soil gas collecting chamber 14 and a deep soil gas collecting chamber 15 by the partition plate 4, the shallow gas collecting bag 2 is arranged in the shallow soil gas collecting chamber 14, and the deep gas collecting bag 3 is arranged in the deep soil gas collecting chamber 15. The vacuum box 1 comprises a side cover 9, and the vacuum box and the side cover 9 are fixedly sealed by two plane locks.
As shown in fig. 2, a sealing ring 7 is provided at the connection between the vacuum box 1 and the side cover 9. A pressure gauge 11 is arranged in the vacuum box. The shallow gas collecting bag 2 is provided with a first valve communicated with the shallow gas collecting pipe 13. The deep gas collecting bag 3 is provided with a second valve communicated with the deep gas collecting pipe 12.
As shown in fig. 3, the structure of the air intake component 5 is matched with the outlet of the layered air production pipe, and is directly connected with the air production ports of different layers of the layered air production pipe, the deep air production pipe 12 is communicated with a deep air production pipe joint 19, the shallow air production pipe 13 is communicated with a shallow air production pipe joint 18, the deep air production pipe joint 19 and the shallow air production pipe joint 18 both penetrate through the vacuum box 1, the sealing gaskets 6 are arranged inside and outside the joints of the deep air production pipe joint 19 and the shallow air production pipe joint 18 and the vacuum box 1 for sealing, and the sealing gaskets are sealed through screw fasteners 17 on the air intake pipe. The air inlet component consists of a shallow layer gas production pipe joint and a deep layer gas production pipe joint, and the shallow layer gas production pipe joint is 1.5 cm shorter than the deep layer gas production pipe joint; the outer ends of the shallow gas production pipe joint and the deep gas production pipe joint are connected with a pipe orifice of a built soil gas well, the shallow gas production pipe joint outside the pipe orifice of the soil gas well is 1.5 cm longer than the deep gas production pipe joint, the shallow gas production pipe joint is just matched with the gas inlet assembly, and sealing is achieved through a sealing ring.
Example 1:
as shown in figure 1, the sampling device comprises a vacuum box 1, a shallow gas collecting bag 2 and a deep gas collecting bag 3; the air inlet component 5, the air outlet pipe 6, the vacuum gauge 11, the box cover 10 and the sealing ring 7 are positioned on the box body of the vacuum box 1; the partition plate 4 is positioned in the middle of the vacuum box 1 and divides the vacuum box 1 into a shallow soil gas sampling chamber 15 and a deep soil gas sampling chamber 16; the shallow air collecting bag 2 is arranged in a shallow soil gas sampling chamber 15 and is connected with a shallow air pipe 13 on the air production pipe component 5; the deep air collecting bag 3 is arranged in the deep soil gas sampling chamber 16 and is connected with the deep air pipe 12 on the air collecting pipe component 5; two plane locks 9 are arranged on the vacuum box 1 and the cover 9 and play a role in fixing and sealing the vacuum box.
When the device is used, the air inlet pipe assembly 5 is connected with a layering pipe of a built soil gas well and fixed, valves of the shallow air collecting bag 2 and the deep air collecting bag 3 are opened and then are respectively connected with the shallow air inlet pipe 13 and the deep air inlet pipe 12, the cover 10 is covered, the vacuum box 1 and the cover 10 are fixed by the plane lock 9, the vacuum gas collecting pump is used for setting the flow rate to be 1.5L-5L/min, the vacuum box is vacuumized, when the shallow air collecting bag 2 and the deep air collecting bag 3 are filled with 80% of gas in volume, the vacuum gas collecting pump is stopped, the cover is opened, the shallow air collecting bag and the deep air collecting bag are taken out, and the device is stored to be tested.
Example 2:
the apparatus of example 1 was used to investigate the gas production in a contaminated site of a certain manufacturing facility. The method comprises the steps of rapidly setting 10 layered aeration zone soil gas wells with the serial number of T1-T10, after a well is built, carrying out well washing through a vacuum pump of 2L/min, after well washing, sealing the pipe openings of a 1-meter deep-mining branched pipe and a 2-meter deep-mining circular pipe, standing for 24 hours, respectively carrying out sampling and convenient GC-MS detection on soil gas of 1 meter depth and soil gas of 2 meters depth by using the vacuum pump, and obtaining three-dimensional results as shown in figure 4.
Example 3:
by using the apparatus of example 1, gas production investigation was conducted on pollution in a certain removed petrochemical enterprise legacy site. The device is used for sampling the soil gas in the aeration zone in a certain area in the field in a layered manner, 20 point locations are arranged, wherein 2 meters of 13 point locations have underground water, and the soil gas in the 2 meters cannot be collected. Therefore, 20 soil gas sample mouths at 1 meter and 7 soil gas samples at 2 meters are finally obtained by a layered sampling method, 27 soil gases are rapidly qualitatively and quantitatively analyzed by using a portable GC-MS, and the main components in the gases are TCE and benzene, and the samples at the same sampling point at 7 meters and 2 meters are different but less than 10 times of the difference, wherein the highest concentration point of TCE is 1 meter from the G9 point, and the highest concentration point of benzene is 1 meter from the G10.
The utility model provides a volatile organic pollutant layering sampling device in aeration zone soil gas specifically realizes that this technical scheme's method and approach are many, above only the utility model discloses a preferred embodiment should point out, to the ordinary technical personnel in 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 improvements 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. The utility model provides a volatile organic pollutant layering sampling device in aeration zone soil gas, its characterized in that, includes vacuum chamber (1), be equipped with shallow layer air collecting bag (2) and deep air collecting bag (3) in the vacuum chamber, shallow layer air collecting bag (2) and deep air collecting bag (3) connect respectively and admit air subassembly (5), set up vacuum exhaust tube (6) in vacuum chamber (1), vacuum exhaust tube (6) are through exhaust tube (21) intercommunication vacuum air pump (22).
2. The stratified sampling device according to claim 1, wherein the shallow gas collecting bag (2) is communicated with a shallow gas collecting pipe (13), and the shallow gas collecting pipe (13) is connected with the gas inlet component (5); the deep gas collecting bag (3) is communicated with a deep gas collecting pipe (12), and the deep gas collecting pipe (12) is connected with the gas inlet component (5).
3. The stratified sampling apparatus according to claim 1, wherein the vacuum box is provided with a partition plate (4), the partition plate (4) partitions the vacuum box (1) into a shallow soil gas collection chamber (14) and a deep soil gas collection chamber (15), the shallow gas collection bag (2) is disposed in the shallow soil gas collection chamber (14), and the deep gas collection bag (3) is disposed in the deep soil gas collection chamber (15).
4. The stratified sampling device according to claim 1, characterized in that the vacuum box (1) comprises a side cover (10), the vacuum box and the side cover (10) being fixedly sealed by means of two plane locks (9).
5. The stratified sampling device according to claim 1, characterized in that a sealing ring (7) is provided at the connection of the vacuum box (1) and the side cover (10).
6. The stratified sampling apparatus as recited in claim 1, wherein a pressure gauge (11) is provided in the vacuum chamber.
7. The stratified sampling apparatus as claimed in claim 1, wherein the shallow gas collection pocket (2) is provided with a first valve (20a) communicating with the shallow gas collection tube (13).
8. The stratified sampling apparatus as claimed in claim 1, wherein the deep gas collection bag (3) is provided with a second valve (20b) communicating with the deep gas collection pipe (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920822683.7U CN210269319U (en) | 2019-06-03 | 2019-06-03 | Layering sampling device for volatile organic pollutants in aeration zone soil gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920822683.7U CN210269319U (en) | 2019-06-03 | 2019-06-03 | Layering sampling device for volatile organic pollutants in aeration zone soil gas |
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| CN210269319U true CN210269319U (en) | 2020-04-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082169A (en) * | 2019-06-03 | 2019-08-02 | 江苏省环境科学研究院 | Volatile organic contaminant layered sampling device in a kind of aerated zone soil gas |
| CN111879574A (en) * | 2020-07-03 | 2020-11-03 | 邓婧 | Sampling device for environment detection |
-
2019
- 2019-06-03 CN CN201920822683.7U patent/CN210269319U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082169A (en) * | 2019-06-03 | 2019-08-02 | 江苏省环境科学研究院 | Volatile organic contaminant layered sampling device in a kind of aerated zone soil gas |
| CN111879574A (en) * | 2020-07-03 | 2020-11-03 | 邓婧 | Sampling device for environment detection |
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