CN211652278U - Shallow natural gas acquisition and sample preparation device - Google Patents
Shallow natural gas acquisition and sample preparation device Download PDFInfo
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- CN211652278U CN211652278U CN202020092444.3U CN202020092444U CN211652278U CN 211652278 U CN211652278 U CN 211652278U CN 202020092444 U CN202020092444 U CN 202020092444U CN 211652278 U CN211652278 U CN 211652278U
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Abstract
The utility model provides a shallow natural gas collecting and sample preparing device, which comprises a gas collecting drill rod component; the gas-liquid separation container comprises a first liquid discharge port, the first liquid discharge port is arranged at the bottom of the gas-liquid separation container, and the gas-liquid separation container is communicated with the gas collecting drill rod assembly through a gas conveying pipe; the input end of the gas booster pump is communicated with the gas-liquid separation container, and the output end of the gas booster pump is communicated with the gas storage device; and the sample preparation device is communicated with the gas storage device through a gas pipe. The utility model provides a shallow natural gas gathers system appearance device and method collects the shallow natural gas through the flowing back method, avoids sneaking into impurity gas such as air at the in-process of collecting, and can reduce the influence of vapor to gas component detection time measuring.
Description
Technical Field
The utility model relates to a natural gas collection technical field, concretely relates to shallow natural gas gathers system appearance device.
Background
Natural gas refers to all gases naturally occurring in nature, including gases formed by various natural processes in the atmosphere, water space and rock space. In petrogeology, oil field gas and gas field gas are commonly referred to, and their composition is predominantly hydrocarbon and contains non-hydrocarbon gases. The hydrocarbon gas contains mainly alkane, most of which is methane, and small amount of ethane, propane and butane, and the natural gas also contains hydrogen sulfide, carbon dioxide, nitrogen, water gas, small amount of carbon monoxide and trace rare gas, such as helium, argon, etc.
The shallow natural gas widely distributed in the coastal river zones of Yangtze delta mainly exists in shallow marine sedimentary formations, sediments in the formations are rich in organic matters, methane-rich gas is formed under the action of anaerobic microorganisms under the reducing condition, and the methane-rich gas is continuously accumulated in pores of the formations. Due to the storage state and the exploitation mode of natural gas, a certain amount of water or water vapor exists in a considerable part of the collected natural gas samples. The test data of the natural gas analysis project can be greatly interfered by water, for example, excessive water vapor can change the peak time of the chromatogram, and the identification of low kurtosis of butane, pentane and the like is interfered; the moisture in the natural gas sample can also cause large deviation of the analysis data of the monomer hydrocarbon isotope, and the isotope mass spectrometer can be seriously caused to be out of order due to the fault.
Utility model patent of publication number CN204461829U specifically discloses a natural gas collection system, and it includes: the gas storage device is used for containing natural gas; the needle valve is communicated with the outlet of the gas storage device; the one end of the solid phase extraction device that extends along the axial is linked together with the gas outlet of needle valve, be equipped with the drier in the solid phase extraction device, the other end of solid phase extraction device is equipped with the first sealing member that is used for shutoff solid phase extraction device, first sealing member dustcoat is equipped with the first backstop portion of fixing in the solid phase extraction device outside, wear to be equipped with in the first backstop portion rather than the second backstop portion that can dismantle the connection, second backstop portion can with first sealing member looks butt, second backstop portion has the through-hole that link up along the axial, the through-hole is used for the external diameter phase. The utility model discloses a natural gas collection system can the accurate volume that obtains the natural gas sample, and the cylinder is reliable carrying out the sample in-process, and sealing performance is good.
The above patents control the moisture or water vapor content of a natural gas sample by using a desiccant. But because the service life of the drying agent is unknown and the replacement frequency is fuzzy and can not be determined, the device has the problems of low matching degree of the field natural gas exploration hole and the like, and is not suitable for collecting shallow natural gas in a field drilling hole.
The utility model patent of publication No. CN208749350U specifically discloses a simple gas sample collecting device in an exploration hole containing a shallow gas stratum, which comprises a funnel, a hose, a diaphragm pump, a gas-liquid separation container, a slurry discharge valve, a micro air pump and a vacuum air collecting bag; the funnel is communicated with the diaphragm pump through a hose; the diaphragm pump is communicated with the gas-liquid separation container through a hose; the top and the bottom of the gas-liquid separation container are respectively provided with a micro air pump and a slurry discharge valve; the micro air pump is communicated with the vacuum air collection bag. The utility model provides a based on geological exploration drilling, not receive the restriction of the gas-bearing formation embedding degree of depth and the gas production process and avoid sneaking into simple and easy gas appearance collection system in the exploration hole on shallow layer gas stratum of air or impurity.
Although particle impurities are removed through the structure, air mixing is easy to occur in the gas collection process of the vacuum gas collection bag, the influence of impurity gases such as air in a collection system cannot be eliminated, and the airtightness and safety in the storage and transportation process cannot be guaranteed.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a shallow natural gas gathers system appearance device and method collects the shallow natural gas through the flowing back method, avoids mixing into impurity gases such as air at the in-process of collecting, and can reduce the influence of vapor to gas composition detection time measuring.
In order to achieve the above purpose, the utility model discloses a technical scheme who takes is:
a shallow natural gas gathers system appearance device includes: a gas-collecting drill stem assembly; the gas-liquid separation container comprises a first liquid discharge port, the first liquid discharge port is arranged at the bottom of the gas-liquid separation container, and the gas-liquid separation container is communicated with the gas collecting drill rod assembly through a gas conveying pipe; the input end of the gas booster pump is communicated with the gas-liquid separation container, and the output end of the gas booster pump is communicated with the gas storage device; the sample preparation device is communicated with the gas storage device through a gas pipe; wherein the gas-liquid separation container, the gas storage device and the sample preparation device are internally provided with saturated sodium chloride solution.
Further, the gas collecting drill rod assembly comprises a first gas outlet, and the first gas outlet controls the on-off of gas through a first stop valve; the gas-liquid separation container also comprises a first gas inlet, a gas outlet and a second gas outlet, and the first gas inlet and the gas outlet are arranged on the side wall of the gas-liquid separation container; the second gas outlet is arranged at the top of the gas-liquid separation container; the first air inlet controls the on-off of air through a second stop valve, the exhaust port controls the on-off of air through a third stop valve, and the second air outlet controls the on-off of air through a fourth stop valve; the first stop valve is connected with the second stop valve through a first gas pipe; the first liquid discharge port controls the discharge of the saturated sodium chloride solution in the gas-liquid separation container through a fifth stop valve; the input end of the gas booster pump is connected with a fourth stop valve through a second gas pipe, and the input end of the gas booster pump controls the on-off of gas through a sixth stop valve; the output end of the gas booster pump is connected with the gas storage device through a third gas pipe; the gas storage device comprises a second gas inlet, a second liquid outlet and a third gas outlet; the second air inlet and the second liquid outlet are arranged on the side wall of the air storage device, the second liquid outlet is arranged on the bottom wall of the air storage device, and the third air outlet is arranged on the top wall of the air storage device; the second air inlet controls the on-off of air through a seventh stop valve, and the second liquid outlet controls the discharge of saturated sodium chloride solution in the gas storage device through an eighth stop valve; the third air outlet controls the on-off of the air through a ninth stop valve; and the system appearance device includes air inlet needle, drainage needle, gas collecting bottle and rubber buffer, system appearance device through the fourth gas-supply pipe with the third gas outlet is connected, fourth gas-supply pipe one end is connected with the ninth stop valve, the fourth gas-supply pipe other end with the air inlet needle is connected, the air inlet needle passes the rubber buffer with the gas collecting bottle intercommunication, the drainage needle passes the rubber buffer is used for getting rid of saturated sodium chloride solution in the gas collecting bottle.
Furthermore, a negative pressure meter is arranged at the output end of the second air outlet, the input end of the negative pressure meter is connected with the second air outlet, and the output end of the negative pressure meter is connected with the fourth stop valve; the output end of the third air outlet is provided with a pressure gauge and a flow meter, one end of the pressure gauge is connected with the third air outlet, the other end of the pressure gauge is connected with the input end of the flow meter, and the output end of the flow meter is connected with the ninth stop valve.
Further, system appearance device still includes saturated sodium chloride solution and sealing membrane, saturated sodium chloride solution is full of the gas collecting bottle, the sealing membrane is used for encapsulating the rubber buffer with the gas collecting bottle.
Further, the gas booster pump is a micro gas booster pump.
Further, the first air delivery pipe, the second air delivery pipe, the third air delivery pipe and the fourth air delivery pipe are air delivery hoses.
Compared with the prior art, the technical scheme of the utility model have following advantage:
(1) the liquid discharge method is used for generating negative pressure to collect shallow natural gas, impurity gases such as air are prevented from being mixed in the collection process, the operation is simple and convenient, samples are easy to store, the operation process and the storage and transportation of the samples are explosion-proof, and the safety is high. The influence of moisture on the detection of natural gas components is reduced.
(2) The shallow natural gas is collected and stored by adopting a saturated sodium chloride method, so that the solubility of the natural gas in water is reduced, the saturated vapor pressure of a saturated sodium chloride solution is lower than that of pure water, the evaporation of water can be greatly reduced, and the influence of the mixing of water and gas on the detection of the components of the natural gas is reduced. The gas collection method has the advantages of good tightness, safety and explosion prevention, and the natural gas collection and storage by the saturated sodium chloride method has higher reliability and superiority.
(3) The utility model discloses equipment structure, principle are simple, and the material easily acquires, group easy dismounting uses the utility model discloses a collection system appearance device carries out the simple facilitate promotion of gas collection operating method.
Drawings
The technical solution and the advantages of the present invention will be made apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a shallow natural gas sampling and sample preparation device according to an embodiment of the present invention;
fig. 2 is a flow chart of a shallow natural gas sampling method according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating the step S10 according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating the step S30 according to an embodiment of the present invention.
Reference numerals:
the gas-liquid separation device comprises a gas collecting drill rod assembly 1, a first gas outlet 11, a first stop valve 12, a gas-liquid separation container 2, a first liquid outlet 21, a first gas inlet 22, a gas outlet 23, a second gas outlet 24, a second stop valve 25, a third stop valve 26, a fourth stop valve 27, a fifth stop valve 28, a first gas pipe 29, a gas booster pump 3, a second gas pipe 31, a sixth stop valve 32, a third gas pipe 33, a gas storage device 4, a second gas inlet 41, a second liquid outlet 42, a third gas outlet 43, a seventh stop valve 44, an eighth stop valve 45, a ninth stop valve 46, a sample preparation device 5, a gas inlet needle 51, a liquid outlet needle 52, a gas collecting bottle 53, a rubber plug 54, a fourth liquid outlet 55, a negative pressure meter 6, a pressure meter 7 and an 8 flow meter.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
The embodiment of the utility model discloses shallow natural gas acquisition system appearance device, as shown in fig. 1, shown shallow natural gas acquisition system appearance device includes: the gas-collecting drill rod component 1, the gas-liquid separation container 2, the gas booster pump 3, the gas storage device 4 and the sample preparation device 5. Wherein the gas-liquid separation container 2, the gas storage device 4 and the sample preparation device 5 are provided with saturated sodium chloride solution therein.
The gas collecting drill rod assembly 1 comprises a first gas outlet 11, and the first gas outlet 11 controls the on-off of gas through a first stop valve 12.
The gas-liquid separation vessel 2 includes a first discharge port 21, a first intake port 22, a discharge port 23, and a second discharge port 24. The first drain port 21 is provided at the bottom of the gas-liquid separation container 2. The first gas inlet 22 and the gas outlet 23 are provided on the side wall of the gas-liquid separation vessel 2. The second gas outlet 24 is provided at the top of the gas-liquid separation vessel 2. The gas-liquid separation container 2 is communicated with the gas-collecting drill rod component 1 through a gas conveying pipe. The first air inlet 22 controls the on-off of the air through a second stop valve 25, the air outlet 23 controls the on-off of the air through a third stop valve 26, and the second air outlet 24 controls the on-off of the air through a fourth stop valve 27. The first stop valve 12 is connected to the second stop valve 25 via a first gas line 29. The first drain port 21 controls the removal of the saturated sodium chloride solution in the gas-liquid separation vessel 2 by a fifth stop valve 28. The output end of the second air outlet 24 is provided with a negative pressure meter 6, the input end of the negative pressure meter 6 is connected with the second air outlet 24, and the output end of the negative pressure meter 6 is connected with the fourth stop valve 27. The first gas pipe 29 can be a metal pipe, a plastic pipe, etc., and the embodiment of the utility model discloses the preferred gas hose of carrying. The gas-liquid separation container 2 contains a saturated sodium chloride solution therein.
The input end of the gas booster pump 3 is communicated with the gas-liquid separation container 2, and the output end of the gas booster pump 3 is communicated with the gas storage device 4. The input end of the gas booster pump 3 is connected with the fourth stop valve 27 through a second gas pipe 31, and the input end of the gas booster pump 3 controls the on-off of gas through a sixth stop valve 32. The output end of the gas booster pump 3 is connected with the gas storage device 4 through a third gas pipe 33. The gas booster pump is preferably a micro gas booster pump. The second air delivery pipe 31 and the third air delivery pipe 33 can be metal pipes, plastic pipes, etc., and the embodiment of the utility model provides a preferred air delivery hose.
The gas storage device 4 includes a second gas inlet 41, a second liquid outlet 42 and a third gas outlet 43. The second air inlet 41 and the second liquid outlet 42 are disposed on the side wall of the air storage device 4, the second liquid outlet 42 is disposed on the bottom wall of the air storage device 4, and the third air outlet 43 is disposed on the top wall of the air storage device 4; the second gas inlet 41 controls the on-off of the gas through a seventh stop valve 44, and the second liquid outlet 42 controls the discharge of the saturated sodium chloride solution in the gas storage device 4 through an eighth stop valve 45. The third air outlet 43 controls the on-off of the air through a ninth stop valve 46. And the output end of the third air outlet 43 is provided with a pressure gauge 7 and a flow meter 8. One end of the pressure gauge 7 is connected with the third air outlet 43, the other end of the pressure gauge 7 is connected with the input end of the flow meter 8, and the output end of the flow meter 8 is connected with the ninth stop valve 46. The gas storage device 4 is internally provided with a saturated sodium chloride solution.
The sample preparation device 5 is communicated with the gas storage device 4 through a gas pipe. System appearance device 5 includes air inlet needle 51, flowing back needle 52, gas collecting bottle 53, rubber buffer 54 and sealing film, system appearance device 5 through fourth gas-supply pipe 55 with third gas outlet 43 is connected. One end of a fourth gas pipe 55 is connected with the ninth stop valve 46, the other end of the fourth gas pipe 55 is connected with the gas inlet needle 51, the gas inlet needle 51 penetrates through the rubber plug 54 to be communicated with the gas collecting bottle 53, and the liquid discharge needle 52 penetrates through the rubber plug 54 to be used for discharging saturated sodium chloride solution in the gas collecting bottle 53. The fourth gas-supply pipe 55 can be a metal pipe, a plastic pipe, etc., and the embodiment of the utility model provides a preferred gas-supply hose.
As shown in FIG. 2, the method for acquiring and sampling shallow natural gas by using the shallow natural gas acquisition and sampling device of the utility model comprises the following steps: s10, carrying out exhaust treatment on the shallow natural gas collecting and sample preparing device, injecting saturated sodium chloride solution into the gas-liquid separation container 2, the gas storage device 4 and the sample preparing device 5, and sealing for later use; and (3) placing the gas transmission pipe in a saturated sodium chloride solution, and sealing two ends of the gas transmission pipe by using sealing films for standby after the gas transmission pipe is fully filled with the saturated sodium chloride solution and exhausted. S20, the shallow natural gas collecting and sample preparing device after exhausting is assembled, and the gas-liquid separation container 2, the gas booster pump 3, the gas storage device 4 and the sample preparing device 5 are sequentially connected by using the gas conveying pipe after exhausting. S30, checking the air tightness of the assembled shallow natural gas collecting and sample preparing device, discharging partial saturated sodium chloride solution in the gas-liquid separation container 2 and the gas storage device 4, and judging the air tightness by observing the negative pressure change of the gas-liquid separation container 2 and the gas storage device 4. S40, collecting shallow natural gas by using the shallow natural gas collecting and sample preparing device with qualified air tightness; and S50, after sampling, sealing the bottle mouth by using a sealing film to finish sample preparation. The gas booster pump is preferably a micro gas booster pump.
As shown in fig. 3, the step S10 specifically includes: s11 is performed by discharging the gas-liquid separation container 2, closing the second stop valve 25, the third stop valve 26, and the fifth stop valve 28 of the gas-liquid separation container 2, opening the fourth stop valve 27, injecting the saturated sodium chloride solution from the first gas inlet 22, and leaving the fourth stop valve 27 ready for use after the injection. S12 exhausts the gas storage device 4, closes the seventh stop valve 44 and the eighth stop valve 45 of the gas storage device 4, opens the ninth stop valve 46, injects saturated sodium chloride solution through the third gas outlet 43, and closes the ninth stop valve 46 after full injection for standby. S13, exhausting the sample preparation device 4, filling at least one gas collection bottle 53 with a saturated sodium chloride solution, closing the rubber stopper 54, and inverting the bottle for use. S14, exhausting the air conveying pipes, placing the first air conveying pipe 29, the second air conveying pipe 31, the third air conveying pipe 33 and the fourth air conveying pipe 55 in saturated sodium chloride solution, and sealing two ends of the air conveying pipes with sealing films for standby after the air conveying pipes are fully exhausted. The first air delivery pipe 29, the second air delivery pipe 31, the third air delivery pipe 33 and the fourth air delivery pipe 55 can be metal pipes, plastic pipes and the like, and the embodiment of the utility model provides a preferred air delivery hose.
The step S20 further includes installing the negative pressure gauge 6 between the second air outlet 24 and the fourth stop valve 27, and installing the pressure gauge 7 and the flow meter 8 between the third air outlet 43 and the ninth stop valve 46 in sequence. After the assembly is finished, the gas collection drill rod 1 is placed in a gas-containing layer, and the first stop valve 12 is closed after the gas is detected to be sprayed out.
As shown in fig. 4, the step S30 specifically includes: s31, closing the first, second, third, and fourth stop valves 12, 25, 26, 27, opening the fifth stop valve 28, discharging the saturated sodium chloride solution from the first discharge port 21 by gravity, closing the fifth stop valve 28 after a predetermined amount (preferably 2/3 of the total volume of the saturated sodium chloride solution) is discharged, observing and recording the pressure value of the negative pressure gauge 6, and when the reading of the negative pressure gauge 6 does not change, forming a negative pressure in the gas-liquid separation vessel, which meets the requirement for gas tightness. S32, checking the air tightness of the gas storage device 4, closing the seventh stop valve 44 and the ninth stop valve 46, opening the eighth stop valve 45, discharging the saturated sodium chloride solution from the second liquid outlet 42 under the action of gravity, observing the pressure value of the pressure gauge 7, and when the pressure value does not change, the air tightness of the gas storage device 4 meets the requirement.
The step S40 specifically includes the following steps: open first stop valve 12 begins to collect shallow natural gas and waits 2 tops of gas-liquid separation container 6 numerical value shows when being 0, opens fourth stop valve 27, sixth stop valve 32, seventh stop valve 44 begin to store gas, waits when pressure gauge 7 shows 1 +/-0.5 Mpa, closes seventh stop valve 44, opens ninth stop valve 46, will air inlet needle 51 inserts in the rubber buffer 54, insert simultaneously drainage needle 52 makes the appearance.
In the step S50, when the saturated sodium chloride solution in the gas bottle 53 is about 1/3, the gas inlet needle 51 and the liquid discharge needle 52 are pulled out, and the bottle mouth is sealed by a sealing film and inverted, thereby completing the sampling process. The saturated sodium chloride solution reduces the solubility of natural gas in water on one hand, and in addition, the saturated vapor pressure of the saturated sodium chloride solution is lower than that of pure water, so that the evaporation of water can be greatly reduced. The shallow natural gas preserved by using the saturated sodium chloride solution has good tightness, safety and reliability.
Through the embodiment of the utility model provides a natural gas detection data that shallow natural gas collection system appearance method made are as follows table 1.
TABLE 1 superficial Natural gas component content Table
As can be seen from Table 1, the oxygen content is 0, which indicates that no air is mixed in the whole gas collecting process, and the storage and transportation of the sample are explosion-proof and have high safety.
The above is only the exemplary embodiment of the present invention, and not the limitation of the present invention, all the equivalent structures or equivalent processes of the present invention are used, or directly or indirectly applied to other related technical fields, and the same principle is included in the patent protection scope of the present invention.
Claims (6)
1. The utility model provides a shallow natural gas gathers system appearance device which characterized in that includes:
a gas collecting drill rod assembly (1);
the gas-liquid separation container (2) comprises a first liquid discharge port (21), the first liquid discharge port (21) is arranged at the bottom of the gas-liquid separation container (2), and the gas-liquid separation container (2) is communicated with the gas collecting drill rod assembly (1) through a gas conveying pipe;
the input end of the gas booster pump (3) is communicated with the gas-liquid separation container (2), and the output end of the gas booster pump (3) is communicated with the gas storage device (4); and
the sample preparation device (5) is communicated with the gas storage device (4) through a gas pipe;
wherein the gas-liquid separation container (2), the gas storage device (4) and the sample preparation device (5) are internally provided with saturated sodium chloride solution.
2. The shallow natural gas sampling and sampling device according to claim 1,
the gas-collecting drill rod assembly (1) comprises a first gas outlet (11), and the first gas outlet (11) controls the on-off of gas through a first stop valve (12);
the gas-liquid separation container (2) further comprises a first gas inlet (22), a gas outlet (23) and a second gas outlet (24), wherein the first gas inlet (22) and the gas outlet (23) are arranged on the side wall of the gas-liquid separation container (2); the second air outlet (24) is arranged at the top of the gas-liquid separation container (2); the first air inlet (22) controls the on-off of the air through a second stop valve (25), the exhaust port (23) controls the on-off of the air through a third stop valve (26), and the second air outlet (24) controls the on-off of the air through a fourth stop valve (27); the first stop valve (12) is connected with the second stop valve (25) through a first air pipe (29); the first liquid discharge port (21) controls the discharge of a saturated sodium chloride solution in the gas-liquid separation container (2) through a fifth stop valve (28);
the input end of the gas booster pump (3) is connected with a fourth stop valve (27) through a second gas pipe (31), and the input end of the gas booster pump (3) controls the on-off of gas through a sixth stop valve (32); the output end of the gas booster pump (3) is connected with the gas storage device (4) through a third gas pipe (33);
the gas storage device (4) comprises a second gas inlet (41), a second liquid outlet (42) and a third gas outlet (43); the second air inlet (41) and the second liquid outlet (42) are arranged on the side wall of the air storage device (4), the second liquid outlet (42) is arranged on the bottom wall of the air storage device (4), and the third air outlet (43) is arranged on the top wall of the air storage device (4); the second gas inlet (41) controls the on-off of gas through a seventh stop valve (44), and the second liquid outlet (42) controls the discharge of saturated sodium chloride solution in the gas storage device (4) through an eighth stop valve (45); the third air outlet (43) controls the on-off of air through a ninth stop valve (46); and
system appearance device (5) including air inlet needle (51), flowing back needle (52), gas collecting bottle (53) and rubber buffer (54), system appearance device (5) through fourth gas-supply pipe (55) with third gas outlet (43) are connected, fourth gas-supply pipe (55) one end is connected with ninth stop valve (46), the fourth gas-supply pipe (55) other end with air inlet needle (51) are connected, air inlet needle (51) pass rubber buffer (54) with gas collecting bottle (53) intercommunication, liquid discharging needle (52) pass rubber buffer (54) are used for getting rid of saturated sodium chloride solution in gas collecting bottle (53).
3. The shallow natural gas sampling and sample preparation device according to claim 2, wherein the output end of the second gas outlet (24) is provided with a negative pressure meter (6), the input end of the negative pressure meter (6) is connected with the second gas outlet (24), and the output end of the negative pressure meter (6) is connected with the fourth stop valve (27); the output end of the third air outlet (43) is provided with a pressure gauge (7) and a flow meter (8), one end of the pressure gauge (7) is connected with the third air outlet (43), the other end of the pressure gauge (7) is connected with the input end of the flow meter (8), and the output end of the flow meter (8) is connected with the ninth stop valve (46).
4. The superficial natural gas collecting and sampling device according to claim 2, further comprising a saturated sodium chloride solution filled in the gas collecting bottle (53) and a sealing film for sealing the rubber plug (54) and the gas collecting bottle (53).
5. The superficial natural gas sampling and sample preparation device according to claim 2, wherein the gas booster pump (3) is a micro gas booster pump.
6. The shallow natural gas sampling device according to claim 2, wherein the first gas pipe (29), the second gas pipe (31), the third gas pipe (33) and the fourth gas pipe (55) are gas hoses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020092444.3U CN211652278U (en) | 2020-01-16 | 2020-01-16 | Shallow natural gas acquisition and sample preparation device |
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| CN202020092444.3U CN211652278U (en) | 2020-01-16 | 2020-01-16 | Shallow natural gas acquisition and sample preparation device |
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