Geogas nano metal particle trapping device and trapping method

Abstract

The invention provides a geogas nano metal particle trapping device and trapping method, and relates to the technical field of geochemical measurement, the trapping device comprises a trapping cylinder, a trapping pipe and a dispersion filter disc; the trapping barrel is filled with trapping liquid, an extraction opening is formed in the top of the trapping barrel, the gas inlet end of the trapping pipe is located outside the trapping barrel, and the gas outlet end of the trapping pipe extends into the trapping pipe. The device has the beneficial effects that gas in the stratum can be continuously pumped into the trapping barrel through the trapping pipe by pumping the gas from the gas pumping opening of the trapping device, so that the trapping liquid can trap nano metal particles in the gas in the stratum. The bubbler is arranged downwards, so that the migration path of the gas to be washed in the trapping liquid can be prolonged; the bubbler at the gas outlet end of the trapping pipe and the dispersing filter disc above the bubbler can disperse the gas overflowing from the gas outlet end of the trapping pipe into tiny bubbles, the contact area of the gas to be washed and the trapping liquid is increased, and therefore the trapping efficiency of the nano metal particles in the gas in the stratum is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of geochemical measurement technology, and in particular to a device and method for capturing nano-metal particles in ground gas. Background Art

[0002] As one of the more effective deep-penetrating geochemical measurement technologies, the main principle of ground-gas nano-metal particles is to capture various types of nano-metal particles related to hidden ore bodies carried up by ground-gas flow in the overburden layer through specific technology, and use high-resolution testing methods to analyze the content of different elements, and then find anomalies. The geochemical anomalies obtained by this technology have the characteristics of large prospecting depth and direct indication of hidden ore bodies under the overburden layer. In recent years, many research works have also continuously confirmed the existence of ultra-fine or nano-metal particles in the gas (ground-gas flow), and because the active nano-metal particles can be adsorbed on the surface of gas molecules due to their huge surface energy, they can be vertically migrated by ground-gas flow in a gas-like form, and can penetrate the overburden above the ore body to reach the surface. Some nano-metal particles can stay in the soil gas for a long time, and some are adsorbed by clay minerals or oxide films in the soil.

[0003] At present, the collection methods used for measuring ground-gas nano-metal particles are mainly active and passive. Among them, the passive ground-gas collection method mainly uses a plastic funnel, and the capture material used is a polystyrene film. When in use, the film is covered on a glass sheet, and the two are placed together at the end of the funnel's air outlet, and a plastic cup is buckled on it. The entire device is buried underground at a depth of about 40-50cm for about two months to capture nano-metal particles, but the collection efficiency of the device is too low, and the equipment is easy to lose, resulting in this method has not yet been widely promoted. The active ground method requires the gas in the formation to be extracted and then the nano-metal particles therein are captured by a capture device, but the existing capture device is difficult to fully absorb the metal particles in the gas, and there will be a problem of loss of capture elements. Therefore, in order to improve the accuracy of the detection of nano-metal particles in ground airflow, a capture device and method that can fully capture nano-metal particles in ground airflow is needed. Summary of the invention

[0004] In view of this, the present invention provides a device for capturing ground-gas nano-metal particles, comprising a capturing cylinder, a capturing pipe and a dispersion filter;

[0005] A liquid outlet is provided at the bottom of the collecting cylinder, an air extraction port is provided at the top of the collecting cylinder, and the internal cavity of the collecting cylinder is an air washing cavity;

[0006] The two ends of the capture pipe are respectively an air inlet end and an air outlet end, the air inlet end of the capture pipe is located outside the capture cylinder, and the air outlet end of the capture pipe passes through the side wall of the capture cylinder and extends to the lower part of the air washing chamber;

[0007] A bubbler is provided at the gas outlet end of the collection pipe, the dispersion filter is arranged in the gas capture and wash cavity, the edge of the dispersion filter is supported on the inner wall of the collection pipe, and the dispersion filter is located above the bubbler.

[0008] Furthermore, the top of the collecting cylinder is open, and a spherical cover is provided on the top of the collecting cylinder. The spherical cover closes the top opening of the collecting cylinder, and the air extraction port is provided on the top of the spherical cover.

[0009] Furthermore, the bottom of the collecting cylinder is funnel-shaped, a drainage pipe is provided at the bottom of the collecting cylinder, and the liquid outlet is located at the lower end of the drainage pipe.

[0010] Furthermore, a drain valve is provided on the drain pipe.

[0011] Furthermore, the bubbler comprises a bubble shell, the bubble shell end is connected to the gas outlet end of the capture tube, a plurality of bubble holes are arranged at the lower part of the bubble shell, and sand core particles are also filled in the bubble shell.

[0012] Furthermore, the gas washing chamber is filled with a collecting liquid, and the dispersing filter is located in the collecting liquid.

[0013] Furthermore, the collecting cylinder and the collecting tube are both made of high borosilicate glass.

[0014] Furthermore, the dispersion filter comprises a fixing ring and a dispersion filter element, the inner wall of the fixing ring is provided with a mounting groove, the edge of the dispersion filter element is limited in the mounting groove, the outer wall of the fixing ring is provided with an elastic ring, and the fixing ring presses the elastic ring against the inner wall of the collection tube.

[0015] Furthermore, the dispersion filter element includes a barrier net and sand core particles filled in the barrier net.

[0016] Furthermore, a connecting column is provided on the outer wall of the collecting cylinder, and two ends of the connecting column are respectively connected to the collecting cylinder and the collecting pipe.

[0017] The present invention also provides a capture method based on the above-mentioned ground gas nano-metal particle capture device, the method comprising the following steps:

[0018] S1: inserting a gas extraction drill with a gas extraction hole on the side wall into the soil of the formation;

[0019] S2: Use an air guide pipe to connect the air extraction drill and the air inlet end of the collecting pipe;

[0020] S3: Connect the air extraction port on the top of the collection tube to the air extraction device;

[0021] S4: Turn on the air extraction device to extract air from the air extraction port for a predetermined time; the ground flow air in the formation soil continuously enters the capture cylinder from the capture pipe, and the capture liquid in the capture cylinder cleans the ground flow air entering the capture cylinder;

[0022] S5: taking out the capture liquid in the capture tube from the liquid outlet, and extracting the nano-metal particles in the capture liquid.

[0023] The beneficial effects of the device and method for capturing nano-metal particles in ground gas of the present invention are as follows: the device comprises a capturing cylinder, a capturing pipe, and a dispersion filter; the capturing cylinder is filled with a capturing liquid, a gas extraction port is provided at the top of the capturing cylinder, the gas inlet end of the capturing pipe is located outside the capturing cylinder, and is used to connect a gas extraction drill inserted into the formation, and the gas outlet end of the capturing pipe extends into the capturing pipe. The gas extraction port is provided at the top of the capturing cylinder, and the gas in the formation can be continuously extracted into the capturing cylinder through the capturing pipe, and all the gas passes through the capturing liquid, and the capturing liquid can capture the nano-metal particles in the gas in the formation. In addition, a bubbler is connected to the gas outlet end of the collecting tube, and a dispersion filter is provided above the bubbler. The bubbler is arranged downward to extend the migration path of the gas to be washed (gas in the formation) in the collecting liquid. At the same time, the bubbler and the dispersion filter can disperse the gas overflowing from the gas outlet end of the collecting tube into tiny bubbles, which can increase the contact area between the gas to be washed and the collecting liquid, so that the nano-metal particles in the gas to be washed can be fully absorbed by the collecting liquid, thereby effectively improving the capture efficiency of the nano-metal particles in the gas in the formation, and then improving the detection accuracy of the nano-metal particles in the ground gas flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of a ground gas nano-metal particle capture device according to an embodiment of the present invention.

[0025] Figure 2 It is a schematic diagram of the internal structure of a ground gas nano-metal particle capture device according to an embodiment of the present invention.

[0026] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0027] In the figure: 1-collecting cylinder, 11-drain pipe, 12-drain valve, 2-collecting pipe, 3-bubbler, 31-bubbling air hole, 4-spherical cover, 41-air suction port, 5-connecting column, 6-dispersion filter, 61-fixing ring, 62-blocking net, 63-elastic ring. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0029] Please refer to Figures 1 to 3A device for capturing ground-gas nano-metal particles comprises a capturing cylinder 1, a capturing tube 2, and a dispersion filter 6.

[0030] The bottom of the collecting cylinder 1 is provided with a liquid outlet, the top of the collecting cylinder 1 is provided with an air extraction port 41, and the inner cavity of the collecting cylinder 1 is a gas washing cavity; the gas washing cavity is filled with a collecting liquid, and the collecting liquid is used to absorb nano-metal particles in the gas passing through it.

[0031] The two ends of the capture tube 2 are respectively an air inlet end and an air outlet end. The air inlet end of the capture tube 2 is located outside the capture tube, and the air outlet end of the capture tube 2 extends through the side wall of the capture tube 1 to the lower part of the gas washing chamber; the air outlet end of the capture tube 2 is provided with a bubbler 3, and the dispersion filter 6 is arranged in the gas washing chamber, and the bubbler 3 and the dispersion filter 6 are both immersed in the capture liquid. The edge of the dispersion filter 6 is supported on the inner wall of the capture tube, and the dispersion filter 6 is located above the bubbler 3, so that all gases in the lower part of the gas washing chamber will pass through the dispersion filter 6 during the migration to the upper part of the gas washing chamber.

[0032] When the capture device is working, the air suction port 41 on the top of the capture tube 1 is connected to the air suction device, and the air inlet end of the capture tube 2 is connected to the air extraction drill, wherein the air extraction drill is inserted into the formation, and the side wall of the air extraction drill is provided with an air extraction hole; the air suction device extracts air from the air suction port 41, so that the gas in the formation (ground flow gas) can continuously enter from the air inlet end of the capture tube 2, and overflow downward from the bubbler 3 at the air outlet end of the capture tube 2, and the overflowed gas moves upward and is finally extracted from the air suction port 41. In the above process, all the ground flow gas passes through the capture liquid, and the capture liquid can capture nano-metal particles in the gas in the formation. In addition, the bubbler is arranged downward to extend the migration path of the gas to be washed (ground flow gas) in the collecting liquid. At the same time, the bubbler and the dispersion filter can disperse the gas overflowing from the gas outlet end of the collecting tube into tiny bubbles, which can increase the contact area between the ground flow gas and the collecting liquid, so that the nano-metal particles in the gas to be washed can be fully absorbed by the collecting liquid, thereby effectively improving the capture efficiency of the nano-metal particles in the gas in the formation, and then improving the detection accuracy of the nano-metal particles in the ground flow.

[0033] Preferably, the capture cylinder 1 and the capture tube 2 are both made of high borosilicate glass. The outer wall of the capture cylinder 1 is also provided with a connecting column 5, and the two ends of the connecting column 5 are respectively connected to the capture cylinder 1 and the capture tube 2. The capture cylinder, the capture tube and the connecting column 5 are an integrated structure.

[0034] Preferably, the top of the collecting cylinder 1 is open, and a spherical cover 4 is provided on the top of the collecting cylinder 1, and the spherical cover 4 closes the top opening of the collecting cylinder 1, and the air suction port 41 is provided on the top of the spherical cover 4, and the connection between the spherical cover 4 and the inner wall of the top opening of the collecting cylinder 1 is a frosted structure, so that the washing chamber in the collecting cylinder 1 can be kept in a closed state, thereby improving the air suction efficiency of the air suction device on the washing chamber.

[0035] Furthermore, the bottom of the collection cylinder 1 is funnel-shaped, and a drain pipe 11 is provided at the bottom of the collection cylinder 1, and the liquid outlet is located at the lower end of the drain pipe 11. A drain valve 12 is also provided on the drain pipe 11, and a drain valve core body is provided in the middle of the drain valve 12, and the drain valve core body is made of tetrafluoroethylene material, so that the captured liquid can be prevented from being contaminated.

[0036] Preferably, the bubbler 3 includes a bubble shell, the bubble shell end is connected to the gas outlet end of the collection tube, a plurality of bubble holes 31 are provided at the lower part of the bubble shell, and the bubble shell is also filled with sand core particles. The bubble shell can make the gas overflow downward from the collection tube, extend the migration path of the gas to be washed in the collection liquid, and the sand core particle shell improves the bubble dispersion effect.

[0037] Preferably, the dispersion filter 6 comprises a fixing ring 61 and a dispersion filter element, the inner wall of the fixing ring 61 is provided with a mounting groove, the edge of the dispersion filter element is limited in the mounting groove, the outer wall of the fixing ring 61 is provided with an elastic ring 63, and the fixing ring 61 presses the elastic ring 63 against the inner wall of the collection tube 1. The dispersion filter element comprises a blocking net 62 and sand core particles filled in the blocking net 62, and the elastic ring can enable the dispersion filter 6 to be fixed to the inner wall of the collection tube 1 by friction, so that the dispersion filter 6 is easy to install.

[0038] The method for capturing nano-metal particles in ground air of the present invention uses the above-mentioned device for capturing nano-metal particles in ground air, and the method comprises the following steps:

[0039] S1: inserting a gas extraction drill with a gas extraction hole on the side wall into the soil of the formation;

[0040] S2: Use an air guide pipe to connect the air extraction drill and the air inlet end of the collecting pipe;

[0041] S3: Connect the air extraction port on the top of the collection tube to the air extraction device;

[0042] S4: Turn on the air extraction device to extract air from the air extraction port for a predetermined time; the ground flow air in the formation soil continuously enters the capture cylinder from the capture pipe, and the capture liquid in the capture cylinder cleans the ground flow air entering the capture cylinder;

[0043] S5: taking out the capture liquid in the capture tube from the liquid outlet, and extracting the nano-metal particles in the capture liquid.

[0044] In this document, the directional words such as front, back, top, and bottom are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the directional words should not limit the scope of protection claimed in this application.

[0045] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for capturing nano-metal particles from ground air, characterized in that: It includes a collecting cylinder, a collecting tube and a dispersing filter; A liquid outlet is provided at the bottom of the collecting cylinder, an air extraction port is provided at the top of the collecting cylinder, and the internal cavity of the collecting cylinder is an air washing cavity; The two ends of the capture pipe are respectively an air inlet end and an air outlet end, the air inlet end of the capture pipe is located outside the capture cylinder, and the air outlet end of the capture pipe passes through the side wall of the capture cylinder and extends to the lower part of the air washing chamber; A bubbler is provided at the gas outlet end of the collection tube, the dispersion filter is arranged in the gas washing cavity, the edge of the dispersion filter is supported on the inner wall of the collection tube, and the dispersion filter is located above the bubbler; The gas washing chamber is filled with a collecting liquid, and the dispersing filter is located in the collecting liquid.

2. The device for capturing nano-metal particles in ground air according to claim 1, characterized in that: The top of the collecting cylinder is open, and a spherical cover is arranged on the top of the collecting cylinder. The spherical cover closes the top opening of the collecting cylinder, and the air extraction port is arranged on the top of the spherical cover.

3. The device for capturing nano-metal particles in ground air according to claim 1, characterized in that: The bottom of the collecting cylinder is funnel-shaped, a drain pipe is provided at the bottom of the collecting cylinder, and the liquid outlet is located at the lower end of the drain pipe; a drain valve is also provided on the drain pipe.

4. The device for capturing nano-metal particles in ground air according to claim 1, characterized in that: The bubbler comprises a bubble shell, the end of the bubble shell is connected to the gas outlet end of the capture tube, a plurality of bubble holes are arranged at the lower part of the bubble shell, and sand core particles are also filled in the bubble shell.

5. The device for capturing nano-metal particles from ground air according to claim 1, characterized in that: The collecting cylinder and the collecting tube are both made of high borosilicate glass.

6. The device for capturing nano-metal particles in ground air according to claim 5, characterized in that: The dispersion filter comprises a fixing ring and a dispersion filter element. The inner wall of the fixing ring is provided with a mounting groove. The edge of the dispersion filter element is limited in the mounting groove. The outer wall of the fixing ring is provided with an elastic ring. The fixing ring presses the elastic ring against the inner wall of the collection tube.

7. The device for capturing nano-metal particles in ground air according to claim 6, characterized in that: The dispersion filter element comprises a blocking net and sand core particles filled in the blocking net.

8. The device for capturing nano-metal particles in ground air according to claim 7, characterized in that: The outer wall of the collecting cylinder is also provided with a connecting column, and the two ends of the connecting column are respectively connected to the collecting cylinder and the collecting pipe.

9. A method for capturing ground-gas nano-metal micro-capture, characterized in that: Using the ground gas nano-metal particle capture device according to any one of claims 1 to 8, the method comprises the following steps: S1: inserting a gas extraction drill with a gas extraction hole on the side wall into the soil of the formation; S2: Use an air guide pipe to connect the air extraction drill and the air inlet end of the collecting pipe; S3: Connect the air extraction port on the top of the collection tube to the air extraction device; S4: Turn on the air extraction device to extract air from the air extraction port for a predetermined time; the ground flow air in the formation soil continuously enters the capture cylinder from the capture pipe, and the capture liquid in the capture cylinder cleans the ground flow air entering the capture cylinder; S5: taking out the capture liquid in the capture tube from the liquid outlet, and extracting the nano-metal particles in the capture liquid.

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