CN211462711U - Tail gas treatment device for natural gas wellhead sampling and testing stage - Google Patents
Tail gas treatment device for natural gas wellhead sampling and testing stage Download PDFInfo
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- CN211462711U CN211462711U CN202021491700.2U CN202021491700U CN211462711U CN 211462711 U CN211462711 U CN 211462711U CN 202021491700 U CN202021491700 U CN 202021491700U CN 211462711 U CN211462711 U CN 211462711U
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Abstract
The utility model discloses a tail gas processing apparatus for natural gas well head sampling and test phase, it relates to a tail gas processing apparatus for natural gas well head sampling and test phase, include: the device comprises a shell with an accommodating cavity, wherein alkaline inorganic solution is contained in the shell, and the shell is provided with a feed inlet for adding the solution, a liquid discharge mechanism for discharging the solution, an air inlet for inputting tail gas and an exhaust port for discharging gas; the exhaust mechanism is at least partially arranged in the shell and communicated with the air inlet, the exhaust mechanism comprises an exhaust pipe, an inlet of the exhaust pipe is communicated with the air inlet, the exhaust pipe is provided with a plurality of exhaust holes, and the calibers of the exhaust holes are gradually increased from the inlet to the direction far away from the inlet; and the gas detection unit is arranged at the air outlet and is used for detecting the concentration of the acid gas in the exhaust gas. This application can carry out abundant processing to the tail gas in natural gas well head sampling and test stage to avoid the polluted environment.
Description
Technical Field
The utility model relates to an oil and natural gas field, in particular to a tail gas processing apparatus for natural gas well head sampling and test stage.
Background
With the development of the petroleum industry and the continuous improvement of the environmental awareness of human beings, the sustainable development of energy and environment also becomes the subject of the current social development. With the continuous exploration and development of increasingly clean energy natural gas reservoirs, in order to ensure the quality of single-well exploitation, geological and geochemical evaluation must be carried out on the natural gas reservoirs, the specific process is shown in figure 1, the natural gas at a wellhead achieves the purposes of sampling and testing through distribution of a six-way valve, but the tail gas of a byproduct mostly contains harmful acid gases such as hydrogen sulfide, carbon dioxide, oxynitride and the like, and the emission standard can be met only through treatment.
The waste gas barrel used at present contains filtering solution for plastic products to filter gas, and the waste gas barrel has the following three problems in use: the depth of the exhaust port in the solution is difficult to control, if the depth of the exhaust port from the liquid level is too large, gas emission is not facilitated, and if the exhaust port is close to the liquid level, the treated gas emission is not in a standard; secondly, because the existing waste gas barrel is open, when the exhaust gas volume is large, the solution is easy to splash, the harm to operators is easy to cause, and the environment is polluted; and thirdly, the gas emission monitoring value belongs to artificial macroscopic control, and the gas emission often exceeds the emission standard, so that certain environmental pollution is caused, and the ecological environment is damaged. Therefore, it is necessary to develop an experimental device capable of processing tail gas in the sampling and testing stage of the wellhead.
Disclosure of Invention
In order to overcome the above defect of prior art, the embodiment of the utility model provides a technical problem that will solve provides a tail gas processing apparatus for natural gas well head sampling and test phase, and it can carry out abundant processing to the tail gas of natural gas well head sampling and test phase to avoid the polluted environment.
The embodiment of the utility model provides a concrete technical scheme is:
a tail gas treatment device for a natural gas wellhead sampling and testing phase, the tail gas treatment device for the natural gas wellhead sampling and testing phase comprising:
the device comprises a shell with an accommodating cavity, wherein the shell is used for accommodating alkaline inorganic solution and is provided with a feed inlet for adding the solution, a liquid discharge mechanism for discharging the solution, an air inlet for inputting tail gas and an exhaust outlet for discharging gas;
the exhaust mechanism is at least partially arranged in the shell and communicated with the air inlet, the exhaust mechanism comprises an exhaust pipe, an inlet of the exhaust pipe is communicated with the air inlet, the exhaust pipe is provided with a plurality of exhaust holes, and the calibers of the exhaust holes are gradually increased from the inlet to the direction far away from the inlet;
and the gas detection unit is arranged at the exhaust port and is used for detecting the concentration of the acid gas in the exhaust gas.
Preferably, the exhaust pipe is in a closed ring shape and arranged in a horizontal direction, and the caliber of the exhaust hole increases from the inlet to the end opposite to the inlet symmetrically.
Preferably, the housing is made of metal, and the inner wall of the housing is provided with a polyethylene anticorrosive coating.
Preferably, the exhaust pipe is at least 10cm away from the liquid surface of the alkaline inorganic solution.
Preferably, the feed inlet is arranged at the upper end of the shell; the liquid discharge mechanism is arranged at the bottom of the shell; the exhaust port is provided at an upper end of the housing.
Preferably, the feed inlet is provided with a cover body capable of being opened and closed; the exhaust port is connected with a discharge pipe, and the upper end of the discharge pipe is provided with a conical dispersing piece with a downward opening for dispersing the discharged gas.
Preferably, the tail gas treatment device for the natural gas wellhead sampling and testing stage further comprises: and the liquid level detector is arranged in the shell and used for detecting the liquid level height of the solution.
Preferably, the alkaline inorganic solution comprises a sodium hydroxide solution.
Preferably, the flow rate of the natural gas tail gas input from the gas inlet is less than or equal to 10L/min.
Preferably, the inner diameter of the exhaust pipe decreases from the inlet to a direction away from the inlet.
The technical scheme of the utility model following beneficial effect that is showing has:
during the sampling and testing stage of the natural gas wellhead, gas required for sampling and testing is collected from a six-way valve at the wellhead of the gas well, and byproduct tail gas in the collection process is introduced into a tail gas treatment device for treatment. The liquid level of the alkaline inorganic solution in the shell is adjusted through the feed inlet and the liquid discharge mechanism, so that the alkaline inorganic solution can be in proper contact time with the flushed tail gas, and the treatment effect is improved. And the tail gas is input into the exhaust mechanism from the air inlet, flows from the inlet to the direction far away from the inlet in the exhaust pipe, and is exhausted through the exhaust hole in the flowing process. Because the gas flow in the blast pipe close to the entrance is big, pressure is big, therefore the bore of the exhaust hole close to the entrance is less than the bore of the exhaust hole far away from the entrance, can slow down the exhaust speed here like this. The exhaust pipe further from the inlet needs to have a large diameter because the exhaust speed needs to be increased because the gas flow rate and the pressure in the exhaust pipe are small and the exhaust pipe further from the inlet needs to have a small pressure. Through the regulation, the gas outlet speed of the exhaust holes in different positions of the whole exhaust pipe is basically equal, the gas quantity reduction caused by the distance from the inlet is greatly reduced, and therefore, tail gas can form more uniform and reasonable-size bubbles to be discharged into alkaline inorganic solution in the shell to react with the alkaline inorganic solution, the acid gas removing percentage is improved, and the gas discharged from the exhaust port of the tail gas treatment device meets the emission standard. When the gas discharged from the exhaust port does not meet the emission standard, the gas detection unit may give an alarm, and at this time, it is necessary to further increase the amount of the alkaline inorganic solution contained in the casing or decrease the flow rate of the exhaust gas introduced into the exhaust gas treatment device.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, which specify the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the present invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for helping the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. The skilled person in the art can, under the teaching of the present invention, choose various possible shapes and proportional dimensions to implement the invention according to the specific situation.
FIG. 1 is a schematic representation of a prior art process for geological and geochemical evaluation of a natural gas reservoir;
FIG. 2 is a cross-sectional view of the tail gas treatment device of the natural gas wellhead sampling and testing stage of the present invention;
FIG. 3 is a top view of the tail gas treatment device of the present invention during the sampling and testing phase of the natural gas wellhead;
fig. 4 is a structural view of the exhaust mechanism in fig. 2.
Reference numerals of the above figures:
1. a housing; 11. a lower housing; 12. an upper cover; 2. an accommodating chamber; 3. an alkaline inorganic solution; 4. a feed inlet; 5. a liquid discharge mechanism; 6. an air inlet; 7. an exhaust port; 8. an exhaust mechanism; 81. an exhaust pipe; 811. an inlet; 82. a connecting pipe; 9. a gas detection unit; 10. a cover body; 13. a dispersion member; 14. liquid level detector.
Detailed Description
The details of the present invention can be more clearly understood with reference to the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of explanation only, and should not be construed as limiting the invention in any way. Given the teachings of the present invention, the skilled person can conceive of any possible variants based on the invention, which should all be considered as belonging to the scope of the invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to carry out sufficient processing in order to can be to the tail gas of natural gas well head sampling and test phase to avoid polluted environment, proposed a tail gas processing apparatus who is used for natural gas well head sampling and test phase in this application, fig. 2 does the utility model discloses well natural gas well head sampling and test phase's tail gas processing apparatus's profile view, fig. 3 does the utility model discloses well natural gas well head sampling and test phase's tail gas processing apparatus's top view, fig. 4 is exhaust mechanism's structure diagram in fig. 2, as shown in fig. 2 to fig. 4, a tail gas processing apparatus for natural gas well head sampling and test phase can include: the device comprises a shell 1 with an accommodating cavity 2, wherein the shell 1 contains alkaline inorganic solution 3, and the shell 1 is provided with a feed inlet 4 for adding the solution, a liquid discharge mechanism 5 for discharging the solution, an air inlet 6 for inputting tail gas and an air outlet 7 for discharging gas; the exhaust mechanism 8 is at least partially arranged in the shell 1 and communicated with the air inlet 6, the exhaust mechanism 8 comprises an exhaust pipe 81, an inlet 811 of the exhaust pipe 81 is communicated with the air inlet 6, a plurality of exhaust holes are formed in the exhaust pipe 81, and the calibers of the exhaust holes are gradually increased from the inlet 811 to the direction far away from the inlet 811; a gas detection unit 9 provided at the exhaust port 7 for detecting the concentration of the acid gas in the exhaust gas.
During the sampling and testing stage of the natural gas wellhead, gas required for sampling and testing is collected from a six-way valve at the wellhead of the gas well, and byproduct tail gas in the collection process is introduced into a tail gas treatment device for treatment. The liquid level of the alkaline inorganic solution 3 in the shell 1 is firstly adjusted through the feed opening 4 and the liquid discharge mechanism 5, so that the alkaline inorganic solution can have proper contact time with the flushed tail gas, and the treatment effect is improved. The exhaust gas is supplied from the intake port 6 to the exhaust mechanism 8, flows through the inlet 811 in the exhaust pipe 81 in a direction away from the inlet 811, and is discharged through the exhaust hole during the flow. Because the gas flow rate and the pressure in the exhaust pipe 81 near the inlet 811 are large, the diameter of the exhaust hole near the inlet 811 is smaller than that of the exhaust hole far from the inlet 811, so that the exhaust speed can be reduced. On the other hand, the gas flow rate and pressure in the exhaust pipe 81 farther from the inlet 811 are small, and therefore the exhaust speed at that position needs to be increased, and therefore the diameter of the exhaust hole farther from the inlet 811 needs to be increased. Through the regulation, the gas outlet speed of the exhaust holes at different positions of the whole exhaust pipe 81 is basically equal, the gas quantity reduction caused by the distance from the inlet 811 is greatly reduced, and therefore, tail gas can form more uniform and reasonable-sized bubbles to be discharged into the alkaline inorganic solution 3 in the shell 1 to react with the alkaline inorganic solution, so that the percentage of removing acid gas is improved, and the gas discharged from the exhaust port 7 of the tail gas treatment device meets the emission standard. When the gas discharged from the gas discharge port 7 does not meet the discharge standard, the gas detection unit 9 gives an alarm, and it is necessary to further increase the amount of the alkaline inorganic solution 3 contained in the casing 1 or decrease the flow rate of the exhaust gas to the exhaust gas treatment device.
In order to better understand the tail gas treatment device for the natural gas wellhead sampling and testing phase in the present application, it will be further explained and illustrated below. As shown in fig. 2-4, an exhaust gas treatment device for a natural gas wellhead sampling and testing phase may include: a housing 1, an exhaust mechanism 8, and a gas detection unit 9. The shell 1 has a containing cavity 2, and the containing cavity 2 in the shell 1 contains an alkaline inorganic solution 3 for reacting with the acid gas in the tail gas. The housing 1 may take various shapes, which is not limited in this application. In order to facilitate the installation of the exhaust mechanism 8 in the housing 1, the housing 1 may include a lower housing 11 having the receiving chamber 2 and an upper cover 12 closing an opening of the lower housing 11, and the upper cover 12 and the lower housing 11 may be fixedly coupled by bolts or the like. In general, the cross section of the housing 1 in the horizontal direction may be circular or circular-like, which facilitates the contact of the gas discharged from the gas discharge mechanism 8 with the alkaline inorganic solution 3 at various positions contained in the housing 1, and facilitates the improvement of the degree of reaction.
As shown in fig. 2 and 3, the housing 1 may be provided with a feed port 4 for adding a solution, and the alkaline inorganic solution 3 may be added into the housing 1 through the feed port 4. In the present embodiment, the alkaline inorganic solution 3 may be preferably selected from a sodium hydroxide solution. Preferably, the feed port 4 is provided at the upper end of the housing 1, i.e., at the upper cap 12, so that the addition of the alkaline inorganic solution 3 can be facilitated without an overflow at the time of addition.
As shown in fig. 2, in one possible embodiment, a lid 10 can be attached to the inlet 4 to be opened and closed, and when it is necessary to add the alkaline inorganic solution 3, the lid 10 is opened. After the alkaline inorganic solution 3 is added, the cover body 10 can be closed and locked, so that other impurities can be prevented from falling into the shell 1, and the alkaline inorganic solution 3 in the shell 1 can be prevented from being toppled over at the feed inlet 4.
As shown in fig. 2 and 3, the casing 1 is provided with a drain mechanism 5 for discharging the solution, and when the drain mechanism 5 is opened, the alkaline inorganic solution 3 in the casing 1 can be discharged out of the casing 1. As a possibility, the drainage means 5 may be a switch valve communicating with the housing chamber 2 inside the casing 1. In order to completely drain the alkaline inorganic solution 3 in the housing 1, a drain mechanism 5 may be provided at the bottom of the housing 1.
As shown in fig. 2 and 3, the casing 1 is provided with an exhaust port 7 for exhausting gas, and the exhaust port 7 is used for exhausting the exhaust gas treated by the alkaline inorganic solution 3. The exhaust port 7 is generally provided at the upper end of the housing 1, which facilitates the exhaust. A gas detection unit 9 is provided at the exhaust port 7 for detecting the concentration of the acid gas in the exhaust gas. When the gas discharged from the gas discharge port 7 does not meet the discharge standard, the gas detection unit 9 gives an alarm, and it is necessary to further increase the amount of the alkaline inorganic solution 3 contained in the casing 1 or decrease the flow rate of the exhaust gas to the exhaust gas treatment device. As a practical matter, the exhaust pipe is connected to the exhaust port 7, the upper end of the exhaust pipe is provided with a dispersion member 13 having a conical shape with a downward opening for dispersing the exhaust gas, and the gas exhausted from the exhaust pipe is blocked by the dispersion member 13 and is dispersed in the circumferential direction, so that the degree of mixing of the exhaust gas with the outside air can be effectively improved.
In a possible embodiment, the housing 1 can be made of metal in order to increase the strength of the housing 1. Preferably, the inner wall of the housing 1 may be provided with a polyethylene anticorrosive coating, so that the corrosion of the housing 1 caused by the reaction between the alkaline inorganic solution 3 and the housing 1 can be effectively avoided.
As shown in fig. 2, an intake port 6 for inputting exhaust gas is provided in the casing 1. The exhaust mechanism 8 is at least partially arranged in the shell 1 and communicated with the gas inlet 6, and the exhaust mechanism 8 is used for dispersedly exhausting the tail gas input into the gas inlet 6 into the shell 1 so as to react with the alkaline inorganic solution 3 to remove the acid gas in the alkaline inorganic solution. The exhaust mechanism 8 may include an exhaust pipe 81, and an inlet 811 of the exhaust pipe 81 communicates with the intake port 6. The exhaust pipe 81 is provided substantially at the bottom inside the casing 1, and the distance of the exhaust pipe 81 from the liquid surface of the alkaline inorganic solution 3 is at least 10cm or more. This makes it possible to increase the time for the discharged gas to react with the alkaline inorganic solution 3. The inlet 811 of the exhaust pipe 81 and the intake port 6 may be connected by a connection pipe 82.
In order to ensure the reaction degree of the tail gas introduced into the gas inlet 6 with the alkaline inorganic solution 3 in the shell 1 and the percentage of the acid gas removed from the tail gas, generally, the flow rate of the natural gas tail gas introduced from the gas inlet 6 is 10L/min or less.
As shown in fig. 4, the exhaust pipe 81 is provided with a plurality of exhaust holes, and the diameters of the exhaust holes increase from the inlet 811 to a direction away from the inlet 811. The exhaust gas flows in the exhaust pipe 81 from the inlet 811 in a direction away from the inlet 811 and is discharged through the exhaust hole during the flow. Because the gas flow rate and the pressure in the exhaust pipe 81 near the inlet 811 are large, the diameter of the exhaust hole near the inlet 811 is smaller than that of the exhaust hole far from the inlet 811, so that the exhaust speed can be reduced. On the other hand, the gas flow rate and pressure in the exhaust pipe 81 farther from the inlet 811 are small, and therefore the exhaust speed at that position needs to be increased, and therefore the diameter of the exhaust hole farther from the inlet 811 needs to be increased. Through the regulation, the gas outlet speed of the exhaust holes at different positions of the whole exhaust pipe 81 is basically equal, the gas quantity reduction caused by the distance from the inlet 811 is greatly reduced, and therefore, tail gas can form more uniform and reasonable-sized bubbles to be discharged into the alkaline inorganic solution 3 in the shell 1 to react with the alkaline inorganic solution, so that the percentage of removing acid gas is improved, and the gas discharged from the exhaust port 7 of the tail gas treatment device meets the emission standard.
Preferably, as shown in fig. 4, the exhaust pipe 81 has a closed ring shape and is disposed in a horizontal direction, and the aperture of the exhaust hole increases symmetrically from the inlet 811 to an end opposite to the inlet 811. In this way, after the exhaust gas enters the inlet 811 of the exhaust pipe 81, the exhaust gas can flow in the exhaust pipe 81 in two directions, i.e., counterclockwise and clockwise, and the exhaust gas is slowly sequentially discharged from the exhaust holes during the flow. In this way, the exhaust velocity can be effectively increased at a place farthest from the inlet 811 of the exhaust pipe 81, on the premise that the length of the inlet 811 and the exhaust pipe 81 is fixed.
Preferably, the inner diameter of the exhaust pipe 81 decreases from the inlet 811 in a direction away from the inlet 811. Since the gas flow rate of the exhaust pipe 81 is increased at a position closer to the inlet 811, the inner diameter thereof needs to be increased to reduce the pressure thereof so as to reduce the gas outlet velocity of the exhaust hole at the position, and the gas flow rate of the exhaust pipe 81 is decreased at a position farther from the inlet 811, the inner diameter thereof needs to be decreased so as to optimize the inner diameter of the exhaust pipe 81, which ultimately helps to make the gas outlet velocity of the exhaust hole at different positions of the entire exhaust pipe 81 substantially equal.
In one possible embodiment, a tail gas treatment device for a natural gas wellhead sampling and testing phase may include: and a liquid level detector 14 disposed in the housing 1 for detecting a liquid level of the solution. The liquid level detector 14 can extend in a vertical direction and is inserted through the upper cover 12 of the housing 1 into the receiving space 2 in the housing 1. The liquid level detector 14 can know the height or the total amount of the alkaline inorganic solution 3 added in the housing 1, so that the user can conveniently adjust the amount of the alkaline inorganic solution 3 in the housing 1.
All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.
The above embodiments are only embodiments of the present invention, and although the embodiments of the present invention are disclosed as above, the contents are only embodiments adopted for facilitating understanding of the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A tail gas treatment device for a natural gas wellhead sampling and testing phase, the tail gas treatment device for the natural gas wellhead sampling and testing phase comprising:
the device comprises a shell with an accommodating cavity, wherein the shell is used for accommodating alkaline inorganic solution and is provided with a feed inlet for adding the solution, a liquid discharge mechanism for discharging the solution, an air inlet for inputting tail gas and an exhaust outlet for discharging gas;
the exhaust mechanism is at least partially arranged in the shell and communicated with the air inlet, the exhaust mechanism comprises an exhaust pipe, an inlet of the exhaust pipe is communicated with the air inlet, the exhaust pipe is provided with a plurality of exhaust holes, and the calibers of the exhaust holes are gradually increased from the inlet to the direction far away from the inlet;
and the gas detection unit is arranged at the exhaust port and is used for detecting the concentration of the acid gas in the exhaust gas.
2. The apparatus of claim 1, wherein the vent pipe is in the form of a closed ring and is disposed horizontally, and the diameter of the vent hole increases symmetrically from the inlet to the end opposite to the inlet.
3. The tail gas treatment device for a natural gas wellhead sampling and testing stage according to claim 1, characterized in that the housing is made of metal, and the inner wall of the housing is provided with a polyethylene corrosion resistant coating.
4. The apparatus for tail gas treatment during natural gas wellhead sampling and testing stage according to claim 1, characterized in that the exhaust pipe is at least above 10cm from the liquid level of the alkaline inorganic solution.
5. The tail gas treatment device for a natural gas wellhead sampling and testing stage according to claim 1, wherein the charging port is provided at an upper end of the housing; the liquid discharge mechanism is arranged at the bottom of the shell; the exhaust port is provided at an upper end of the housing.
6. The tail gas treatment device for the natural gas wellhead sampling and testing stage as claimed in claim 1, wherein the charging port is provided with a cover body which can be opened and closed; the exhaust port is connected with a discharge pipe, and the upper end of the discharge pipe is provided with a conical dispersing piece with a downward opening for dispersing the discharged gas.
7. The tail gas treatment device for a natural gas wellhead sampling and testing stage according to claim 1, further comprising: and the liquid level detector is arranged in the shell and used for detecting the liquid level height of the solution.
8. The tail gas treatment plant for a natural gas wellhead sampling and testing stage according to claim 1, characterised in that the alkaline inorganic solution comprises a sodium hydroxide solution.
9. The tail gas treatment device for a natural gas wellhead sampling and testing stage as claimed in claim 1 wherein the flow rate of the natural gas tail gas input from the gas inlet is less than or equal to 10L/min.
10. The apparatus of claim 1, wherein the internal diameter of the vent pipe decreases from the inlet to a direction away from the inlet.
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| CN114659749A (en) * | 2022-02-28 | 2022-06-24 | 哈尔滨工程大学 | Planar passive ventilation navigation body model and application method thereof |
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| CN114659749A (en) * | 2022-02-28 | 2022-06-24 | 哈尔滨工程大学 | Planar passive ventilation navigation body model and application method thereof |
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