A shale gas collection analysis device and method

Abstract

The present application belongs to the technical field of shale gas analysis and collection equipment, in particular to a shale gas collection and analysis device and method. In view of the problem that the existing shale gas collection and analysis device lacks effective mixed gas separation and treatment measures, the following scheme is proposed, which comprises a treatment tank, a circular opening is formed on the upper side of the treatment tank, a conveying pipe is fixedly connected to the inner wall of the circular opening, and a dehumidification box is fixedly connected to the end of the conveying pipe away from the treatment tank. The shale gas collection and analysis device and method disclosed in the present application can separate and treat impurities such as hydrogen sulfide, carbon dioxide and water vapor mixed in shale gas before analyzing the composition of shale gas, thereby effectively improving the concentration of shale gas, significantly reducing the interference of impurities in shale gas on the analysis result of shale gas, enabling the detection personnel to more easily judge the reserves of shale gas in the shale gas collection area, ensuring the accuracy of the analysis result and improving the detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of shale gas analysis and collection equipment technology, and in particular to a shale gas collection and analysis device and method. Background Technology

[0002] Shale gas is unconventional natural gas trapped in tight shale formations, and its commercial extraction relies on breakthroughs in horizontal drilling and hydraulic fracturing technologies. The extracted gas is a mixture containing impurities and must undergo purification processes such as amine desulfurization and glycol dehydration before it can become qualified commercial natural gas. While this resource has changed the energy landscape, it has also brought controversies such as water consumption, environmental risks, and high costs.

[0003] Existing shale gas collection and analysis equipment lacks effective measures for separating and processing mixed gases. This prevents the equipment from processing carbon dioxide, hydrogen sulfide, and water vapor mixed in shale gas. These components can significantly interfere with the analysis results, leading to misjudgments by experts regarding the shale gas reserves in the collection area. Summary of the Invention

[0004] This invention discloses a shale gas collection and analysis device and method, aiming to solve the technical problem in the prior art that existing shale gas collection and analysis devices lack effective measures for separating and treating mixed gases.

[0005] This invention proposes a shale gas collection and analysis device, comprising a processing tank. A circular opening is provided on the upper side of the processing tank, and a conveying pipe is fixedly connected to the inner wall of the opening. A dehumidification box is fixedly connected to the end of the conveying pipe away from the processing tank. A gas guide pipe is provided on the upper side of the dehumidification box, and a second suction pump is fixedly connected to the upper side of the dehumidification box. The output end of the second suction pump is connected to the gas guide pipe via a conduit. A gas delivery pipe is provided at the bottom of the processing tank. Electronic valves one and two are respectively installed outside the gas delivery pipe and the conveying pipe. A support frame is fixedly connected to the outside of the processing tank, and a first air pump is fixedly connected to the outside of the support frame. The output end of the first air pump is connected to the gas delivery pipe via a thin tube. The same screening and isolation module is provided on both the processing tank and the dehumidification box. The screening and isolation module includes two symmetrical circular rods, each with multiple circumferentially distributed stirring paddles on its outer side. A short pipe is provided inside the processing tank, and a conical block is provided above the short pipe. Two staggered inclined guide plates are provided inside the dehumidification box.

[0006] In a preferred embodiment, the processing tank is equipped with a rotating shaft, to which a transverse frame is movably connected. An isolation cover is fixedly connected to the upper side of the transverse frame. A drive motor is fixedly connected to the inner top wall of the isolation cover. The output end of the drive motor is connected to the upper side of the rotating shaft via a coupling. Two symmetrical mounting brackets are fixedly connected to the outside of the rotating shaft. Each of the two mounting brackets has two symmetrical slots. The inner walls of the two slots on one side are movably connected to the outside of a round rod on the same side. Two symmetrical mounting discs are fixedly connected to the outside of each round rod. The opposite side of the two rotating shafts on the same side is connected to the outside of a stirring paddle on the same side. All are fixedly connected; gears are fixedly connected to the outside of both round rods, and an internal gear ring is provided on the outside of the rotating shaft. The upper side of the internal gear ring is fixedly connected to the bottom of the transverse frame. Both gears mesh with the internal gear ring. An outer ring is slidably connected to the outside of the short tube, and an annular fixed platform is slidably connected to the outside of the outer ring. Two symmetrical round holes are opened at the bottom of the outer ring, and a short rod and a threaded rod are respectively arranged in the round holes. A groove is opened on the bottom inner wall of the annular fixed platform. A rotating motor is fixedly connected to the inner wall of the groove. The output end of the rotating motor is connected to the bottom of the threaded rod through a coupling. The bottom of the short rod is connected to the bottom inner wall of the annular fixed platform. A fixed connection is provided, with a hanger on the outside of the short pipe, and the outside of the hanger is fixedly connected to the upper side of the conical block. The bottom of the hanger is fixedly connected to the upper side of the outer ring. A nozzle is fixedly connected to the upper side of the short pipe, located below the conical block. Two circular openings are provided on the outside of the treatment tank, and the same return pipe is provided in both circular openings. One end of the return pipe is located at the bottom of the treatment tank, and the other end is connected to the short pipe. A pump is fixedly connected to the outside of the treatment tank, and the output end of the pump is connected to the return pipe through a circular pipe. Two small holes are provided on the outside of the treatment tank, and the same return gas pipe is provided in both small holes. The two ends of the return gas pipe are respectively... Located at the top and bottom of the treatment tank, and with an air pump fixedly connected to the outside of the treatment tank, the output end of the air pump is connected to the return air pipe through a thin tube; a bracket is fixedly connected to the bottom of the dehumidification box, and an inclined mask is fixedly connected to the inner wall of the bottom of the dehumidification box. The inclined mask is located above the end of the conveying pipe away from the treatment tank, and a mesh plate is fixedly connected to the inner wall of the inclined mask. Two inclined guide plates are fixedly connected to the side opposite to the inner wall of the dehumidification box; an ultrasonic generator is fixedly connected to the side of the two inclined guide plates away from the inclined mask, and multiple equidistant convex strips are fixedly connected to the side of the inclined guide plates near the inclined mask.

[0007] A shale gas collection and analysis method, using a shale gas collection and analysis device as described above, includes the following steps: Step 1: Open electronic valve 1 and start air pump 1 to deliver the gas extracted from the rock sample into the processing tank. Then open electronic valve 2 and start air pump 2 to deliver the gas through the delivery pipe into the dehumidification box. Step 2: During the process of the gas being transported through the gas pipeline to the treatment tank and then to the dehumidification box, the hydrogen sulfide, carbon dioxide and water vapor in the gas are separated using a screening and isolation module. Step 3: The processed gas is transported and collected through the gas delivery pipe, and the original gas volume and the current gas volume are compared to perform shale gas analysis.

[0008] As can be seen from the above, the shale gas collection and analysis device provided by the present invention can separate impurities such as hydrogen sulfide, carbon dioxide, and water vapor mixed in shale gas before analyzing the shale gas components. This effectively increases the concentration of shale gas, significantly reduces the interference of impurities in shale gas on the analysis results, and allows testing personnel to more easily determine the shale gas reserves in the shale gas collection area, ensuring the accuracy of the analysis results and improving the efficiency of the testing. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the overall structure of a shale gas collection and analysis device proposed in this invention; Figure 2 This is a cross-sectional structural schematic diagram of a shale gas collection and analysis device proposed in this invention; Figure 3 This is a schematic diagram of the processing tank structure of a shale gas collection and analysis device proposed in this invention; Figure 4 This is a schematic diagram of the rotating shaft and stirring paddle structure of a shale gas collection and analysis device proposed in this invention; Figure 5 This is a schematic diagram of a short tube structure of a shale gas collection and analysis device proposed in this invention; Figure 6 This is a schematic diagram of the external ring structure of a shale gas collection and analysis device proposed in this invention; Figure 7 This is a schematic diagram of the dehumidification box structure of a shale gas collection and analysis device proposed in this invention.

[0010] In the diagram: 1. Processing tank; 2. Dehumidification box; 3. Gas supply pipe; 4. Electronic valve one; 5. Air pump one; 6. Delivery pipe; 7. Electronic valve two; 8. Air guide pipe; 9. Screening and isolation module; 901. Rotating shaft; 902. Short pipe; 903. Horizontal frame; 904. Fixing frame; 905. Round rod; 906. Internal gear ring; 907. Drive motor; 908. Isolation cover; 909. Gear; 910. Mounting plate; 911. Agitator; 912. 913. Return pipe; 914. Pump; 915. Air return pipe; 916. Suction pump one; 917. External ring; 918. Annular fixed platform; 919. Short rod; 920. Threaded rod; 921. Rotating motor; 922. Hanger; 923. Conical block; 924. Slanted mask; 925. Mesh plate; 926. Slanted guide plate; 927. Raised strip; 928. Ultrasonic generator; 919. Suction pump two; 920. Bracket; 921. Support frame. Detailed Implementation

[0011] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0012] The shale gas collection and analysis device disclosed in this invention is mainly applied to scenarios where existing shale gas collection and analysis devices lack effective measures for separating and processing mixed gases.

[0013] Reference Figures 1-7 A shale gas collection and analysis device includes a processing tank 1. A circular opening is formed on the upper side of the processing tank 1. A delivery pipe 6 is bolted to the inner wall of the circular opening. A dehumidification box 2 is bolted to the end of the delivery pipe 6 away from the processing tank 1. A gas guide pipe 8 is installed on the upper side of the dehumidification box 2. A second suction pump 10 is bolted to the upper side of the dehumidification box 2. The output end of the second suction pump 10 is connected to the gas guide pipe 8 via a conduit. A gas delivery pipe 3 is installed at the bottom of the processing tank 1. An electronic valve 4 and an electronic valve 7 are respectively installed on the outside of the gas delivery pipe 3 and the delivery pipe 6. A support frame 12 is bolted to the outside of the support frame 12, and an air pump 5 is bolted to the outside of the support frame 12. The output end of the air pump 5 is connected to the air supply pipe 3 through a thin tube. The same screening and isolation module 9 is provided on the treatment tank 1 and the dehumidification box 2. The screening and isolation module 9 includes two symmetrical round rods 905. Multiple stirring paddles 911 are arranged in a circular and equidistant pattern on the outside of the round rods 905. A short pipe 902 is provided inside the treatment tank 1. A conical block 922 is provided above the short pipe 902. Two staggered inclined guide plates 925 are provided inside the dehumidification box 2.

[0014] Specifically, the device utilizes the screening and isolation module 9 to separate impurities such as hydrogen sulfide, carbon dioxide, and water vapor mixed in with shale gas before analyzing its components. This effectively increases the concentration of shale gas, significantly reduces the interference of impurities in the shale gas on the analysis results, and allows testing personnel to more easily determine the shale gas reserves in the shale gas collection area, ensuring the accuracy of the analysis results and improving the efficiency of the testing.

[0015] Reference Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7In a preferred embodiment, a rotating shaft 901 is provided inside the processing tank 1. A transverse frame 903 is rotatably connected to the outside of the rotating shaft 901 via bearings. An isolation cover 908 is bolted to the upper side of the transverse frame 903. A drive motor 907 is bolted to the inner top wall of the isolation cover 908. The output end of the drive motor 907 is connected to the upper side of the rotating shaft 901 via a coupling. Two symmetrical fixing frames 904 are bolted to the outside of the rotating shaft 901. Each fixing frame 904 has two symmetrical slots. The inner walls of the two slots on one side are rotatably connected to the outside of a round rod 905 on the same side via bearings. Two symmetrical mounting plates 910 are bolted to the outside of the round rod 905 on the same side. The opposite side of the rotating shaft 901 is bolted to the outside of the stirring paddle 911 on the same side; gears 909 are bolted to the outside of the two round rods 905; an internal gear ring 906 is provided on the outside of the rotating shaft 901, and the upper side of the internal gear ring 906 is bolted to the bottom of the transverse frame 903. Both gears 909 mesh with the internal gear ring 906. An outer ring 916 is slidably connected to the outside of the short tube 902, and an annular fixed platform 917 is slidably connected to the outside of the outer ring 916. Two symmetrical round holes are opened at the bottom of the outer ring 916, and a short rod 918 and a threaded rod 919 are respectively installed in the round holes. A groove is opened on the inner wall of the bottom of the annular fixed platform 917; a rotating motor 920 is bolted to the inner wall of the groove. The output end of machine 920 is connected to the bottom of threaded rod 919 via a coupling. The bottom of short rod 918 is bolted to the inner wall of the bottom of annular fixed platform 917. A hanger 921 is installed on the outside of short pipe 902, and the outside of hanger 921 is bolted to the upper side of conical block 922. The bottom of hanger 921 is bolted to the upper side of outer ring 916. A nozzle is bolted to the upper side of short pipe 902, and the nozzle is located below conical block 922. Two circular openings are opened on the outside of treatment tank 1, and the same return pipe 912 is installed in the two circular openings. One end of return pipe 912 is located at the bottom of treatment tank 1, and the other end is connected to short pipe 902. A pump 913 is bolted to the outside of treatment tank 1. The output end of 3 is connected to the return pipe 912 through a round pipe; two small holes are opened on the outside of the treatment tank 1, and the same return pipe 914 is installed in the two small holes. The two ends of the return pipe 914 are located at the top and bottom of the treatment tank 1, respectively. An air pump 915 is bolted to the outside of the treatment tank 1. The output end of the air pump 915 is connected to the return pipe 914 through a thin pipe; a bracket 11 is bolted to the bottom of the dehumidification box 2. An inclined mask 923 is bolted to the inner wall of the bottom of the dehumidification box 2. The inclined mask 923 is located above the end of the conveying pipe 6 away from the treatment tank 1. A mesh plate 924 is bolted to the inner wall of the inclined mask 923. The two inclined guide plates 925 are bolted to the side opposite to the inner wall of the dehumidification box 2.Both inclined guide plates 925 have ultrasonic generators 927 bolted to the side away from the inclined shield 923, and both inclined guide plates 925 have multiple equidistant protrusions 926 bolted to the side closer to the inclined shield 923.

[0016] In specific application scenarios, the screening and isolation module 9 is mainly used in the screening and isolation stage of the screening and isolation process. That is, the screening and isolation module 9 uses the internal gear ring 906, gear 909, mounting plate 910 and stirring paddle 911 to enable the device to fully contact the shale gas mixed with hydrogen sulfide and carbon dioxide with the amine-rich liquid. By completely breaking up the bubbles, the contact area between the gas and the amine-rich liquid is greatly increased, thereby improving the absorption rate of hydrogen sulfide and carbon dioxide by the amine-rich liquid. The return pipe 912, return gas pipe 914, cone block 922 and short pipe 902 can make the amine-rich liquid contact the gas again, thereby ensuring that the hydrogen sulfide and carbon dioxide in the gas can be completely absorbed and separated from the shale gas, further improving the separation and treatment effect of the device on the gas. It should be noted that by using the inclined guide plate 925, the convex strip 926, the ultrasonic generator 927, and the mesh plate 924, the device can quickly remove water vapor from the gas through the triethylene glycol in the dehumidification box 2, thereby significantly reducing the impact of water vapor on the detection when the testing personnel analyze shale gas, and at the same time avoiding the formation of hydrates and corrosion of pipelines.

[0017] A shale gas collection and analysis method, using a shale gas collection and analysis device as described above, includes the following steps: Step 1: Open electronic valve 4 and start air pump 5 to deliver the gas extracted from the rock sample to the processing tank 1. Then open electronic valve 7 and start air pump 10 to deliver the gas to the dehumidification box 2 through the delivery pipe 6. Step 2: During the process of transporting gas through gas pipeline 3 to processing tank 1 and then to dehumidification box 2, the screening and isolation module 9 is used to separate hydrogen sulfide, carbon dioxide, and water vapor in the gas. (Open electronic valve 4, start gas pump 5, and transport the gas extracted from shale gas to processing tank 1 through gas pipeline 3. Processing tank 1 contains a certain amount of amine-rich liquid. The gas forms bubbles in the amine-rich liquid at the bottom of processing tank 1 and rises to the surface. Start drive motor 907, which drives rotating shaft 901 to rotate, thereby causing fixed frame 904 to drive round rod 9.) 05. As the round rod 905 rotates with the rotating shaft 901, the gear 909 meshes with the internal gear ring 906, causing the round rod 905 to rotate. This, in turn, causes the stirring paddle 911 on the mounting plate 910 to rotate, breaking the bubbles into smaller bubbles that float to the surface. The pump 913 is then activated, transporting the rich amine solution from the bottom of the treatment tank 1 to the short pipe 902. The solution is then pressurized and sprayed out through the nozzle, impacting the conical surface of the conical block 922 and scattering it, thus flushing the suspended gas after the bubbles have broken. The rotating motor 920 is then activated, driving the threaded rod 919 to rotate. The movement causes the outer ring 916 to rise or fall on the annular fixed platform 917, thereby changing the coverage area of ​​the umbrella-shaped liquid formed by the impact of the rich amine liquid on the conical block 922. The vacuum pump 915 is then activated, transferring the gas from the upper part of the treatment tank 1 back to the rich amine liquid in the lower part of the treatment tank 1 for reprocessing. After processing is complete, the electronic valve 7 is opened, and the vacuum pump 10 is activated, allowing the vacuum pump 10 to input the gas from the treatment tank 1 through the air guide pipe 8 from the bottom of the dehumidification box 2. The dehumidification box 2 contains a triethylene glycol solution, and the gas is in the solution... Bubbles are formed and, under the pressure of the internal environment of the vacuum pump 10 and the processing tank 1, are forced to pass through the mesh of the mesh plate 924, forming smaller bubbles. After the bubbles come into contact with the triethylene glycol solution, the water vapor in the gas is absorbed by the solution, and the bubbles continue to rise. They come into contact with the inclined guide plate 925 and slowly rise along the outer surface of the inclined guide plate 925 and the convex strip 926. The ultrasonic generator 927 is activated, and the ultrasonic waves generated by the ultrasonic generator 927 further break up the bubbles. The shale gas with water vapor removed is transported out through the gas guide pipe 8 and finally collected and analyzed. Step 3: The processed gas is transported and collected through the gas delivery pipe 8. The original gas volume and the current gas volume are compared to perform shale gas analysis.

[0018] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A shale gas collection and analysis device, comprising a processing tank (1), characterized in that, The upper side of the treatment tank (1) has a round opening, and a conveying pipe (6) is fixedly connected to the inner wall of the round opening. The end of the conveying pipe (6) away from the treatment tank (1) is fixedly connected to a dehumidification box (2). An air guide pipe (8) is provided on the upper side of the dehumidification box (2). An air pump (10) is fixedly connected to the upper side of the dehumidification box (2). The output end of the air pump (10) is connected to the air guide pipe (8) through a conduit. An air supply pipe (3) is provided at the bottom of the treatment tank (1). An electronic valve (4) and an electronic valve (7) are respectively provided on the outside of the air supply pipe (3) and the conveying pipe (6). A support frame (1) is fixedly connected to the outside of the treatment tank (1). 2) An air pump (5) is fixedly connected to the outside of the support frame (12). The output end of the air pump (5) is connected to the air supply pipe (3) through a thin tube. The same screening and isolation module (9) is provided on the treatment tank (1) and the dehumidification box (2). The screening and isolation module (9) includes two symmetrical round rods (905). Multiple stirring paddles (911) are arranged in a circular and equidistant manner on the outside of the round rods (905). A short pipe (902) is provided inside the treatment tank (1). A conical block (922) is provided above the short pipe (902). Two staggered inclined guide plates (925) are provided inside the dehumidification box (2).

2. The shale gas collection and analysis device according to claim 1, characterized in that, The processing tank (1) is equipped with a rotating shaft (901), and a transverse frame (903) is movably connected to the outside of the rotating shaft (901). An isolation cover (908) is fixedly connected to the upper side of the transverse frame (903). A drive motor (907) is fixedly connected to the top inner wall of the isolation cover (908). The output end of the drive motor (907) is connected to the upper side of the rotating shaft (901) through a coupling. Two symmetrical fixed frames (904) are fixedly connected to the outside of the rotating shaft (901).

3. The shale gas collection and analysis device according to claim 2, characterized in that, Two symmetrical slots are provided on each of the two fixed brackets (904). The inner walls of the two slots on one side are movably connected to the outside of the round rod (905) on the same side. Two symmetrical mounting plates (910) are fixedly connected to the outside of the round rod (905). The opposite side of the two rotating shafts (901) on the same side is fixedly connected to the outside of the stirring paddle (911) on the same side.

4. The shale gas collection and analysis device according to claim 3, characterized in that, Gears (909) are fixedly connected to the outside of both of the two round rods (905). An internal gear ring (906) is provided on the outside of the rotating shaft (901). The upper side of the internal gear ring (906) is fixedly connected to the bottom of the transverse frame (903). Both gears (909) mesh with the internal gear ring (906). An external ring (916) is slidably connected to the outside of the short tube (902). An annular fixing platform (917) is slidably connected to the outside of the external ring (916). Two symmetrical round holes are opened at the bottom of the external ring (916). A short rod (918) and a threaded rod (919) are respectively provided in the round holes. A groove is opened on the inner wall of the bottom of the annular fixing platform (917).

5. A shale gas collection and analysis device according to claim 4, characterized in that, A rotating motor (920) is fixedly connected to the inner wall of the groove. The output end of the rotating motor (920) is connected to the bottom of the threaded rod (919) through a coupling. The bottom of the short rod (918) is fixedly connected to the bottom inner wall of the annular fixed platform (917). A hanger (921) is provided on the outside of the short tube (902), and the outside of the hanger (921) is fixedly connected to the upper side of the conical block (922). The bottom of the hanger (921) is fixedly connected to the upper side of the outer ring (916).

6. A shale gas collection and analysis device according to claim 5, characterized in that, A nozzle is fixedly connected to the upper side of the short pipe (902). The nozzle is located below the conical block (922). Two circular openings are opened on the outside of the treatment tank (1). The same return pipe (912) is installed in the two circular openings. One end of the return pipe (912) is located at the bottom of the treatment tank (1), and the other end is connected to the short pipe (902). A pump (913) is fixedly connected to the outside of the treatment tank (1). The output end of the pump (913) is connected to the return pipe (912) through a circular pipe.

7. A shale gas collection and analysis device according to claim 6, characterized in that, The processing tank (1) has two small holes on its exterior, and the same return air pipe (914) is installed in the two small holes. The two ends of the return air pipe (914) are located at the top and bottom of the processing tank (1) respectively. A vacuum pump (915) is fixedly connected to the exterior of the processing tank (1). The output end of the vacuum pump (915) is connected to the return air pipe (914) through a thin pipe.

8. A shale gas collection and analysis device according to claim 7, characterized in that, The bottom of the dehumidification box (2) is fixedly connected to a bracket (11), and the bottom inner wall of the dehumidification box (2) is fixedly connected to a slanted mask (923). The slanted mask (923) is located above the end of the conveying pipe (6) away from the treatment tank (1). The inner wall of the slanted mask (923) is fixedly connected to a mesh plate (924), and the two slanted guide plates (925) are fixedly connected to the side opposite to the inner wall of the dehumidification box (2).

9. A shale gas collection and analysis device according to claim 8, characterized in that, An ultrasonic generator (927) is fixedly connected to the side of each of the two inclined guide plates (925) away from the inclined mask (923), and multiple equidistant protrusions (926) are fixedly connected to the side of each inclined guide plate (925) close to the inclined mask (923).

10. A shale gas collection and analysis method, using a shale gas collection and analysis device as described in claim 9, characterized in that, The steps include the following: Step 1: Open electronic valve 1 (4), start air pump 1 (5), and transport the gas extracted from the rock sample to the processing tank (1). Then open electronic valve 2 (7), start air pump 2 (10), and transport the gas through the delivery pipe (6) to the dehumidification box (2). Step 2: During the process of the gas being transported through the gas pipeline (3) to the treatment tank (1) and then to the dehumidification box (2), the hydrogen sulfide, carbon dioxide and water vapor in the gas are separated by the screening and isolation module (9); Step 3: The treated gas is transported and collected through the gas delivery pipe (8), and the original gas volume and the current gas volume are compared to perform shale gas analysis.

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