Gas phase balance type carbon dioxide replacement methane gas exploitation device and construction method

Abstract

The invention discloses a gas phase balance type carbon dioxide replacement methane gas exploitation device and a construction method, and relates to the technical field of methane gas exploitation, the gas phase balance type carbon dioxide replacement methane gas exploitation device comprises an exploitation assembly, the exploitation assembly comprises an exploitation drill bit, a gas guide pipe is arranged in the exploitation drill bit, a thermoacoustic refrigerator is fixed to the top of the exploitation drill bit, and a high-temperature pipe is arranged in the exploitation drill bit; one side of the bottom of the thermoacoustic refrigerator is communicated with a low-temperature pipe, and cooling fins are fixed to the end of the low-temperature pipe; and the storage assembly is arranged at the top of the mining drill bit and comprises a guide plate arranged at the top of the mining drill bit. Through cooperation of the thermo-acoustic refrigerator and the storage assembly, the combustible ice is melted to be in a gas state firstly, then the combustible ice is in a solid state through low temperature to be transported, compared with a gas transportation mode, the transportation mode is more stable and efficient, and meanwhile the loss and safety problems caused by gas pipeline transportation are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of methane gas extraction, in particular to a gas-phase balanced carbon dioxide replacement methane gas extraction device and a construction method thereof. Background Art

[0002] The exploitation of natural gas hydrates (commonly known as combustible ice) is a century project for humanity to move towards the utilization of deep-sea clean energy. This "solid natural gas" sealed in the seabed has extremely high global reserves and only produces water and carbon dioxide when burned, with relatively less environmental pollution. Therefore, countries around the world have carried out extensive research on this clean energy extraction technology. Carbon dioxide is a typical greenhouse gas and can solidify under low-temperature and high-pressure environments. Therefore, extensive research has been carried out on carbon dioxide sequestration technology. By using high temperature to promote methane gasification and low temperature to ensure the solidification effect of carbon dioxide, it is possible to realize methane extraction and carbon dioxide sequestration while ensuring the stability of the marine formation environment, which is an extraction method with remarkable economic and environmental benefits. In the prior art, the creation of high and low temperature environments is generally achieved by introducing gases, but it will generate high-frequency airflow whistles, which may trigger submarine microseisms; at the same time, the compressed air introduced will affect the later sequestration quality of carbon dioxide gas, resulting in relatively low formation strength. Summary of the Invention

[0003] Object of the Invention: The problem to be solved by the present invention is how to solve the problem that in the prior art, the creation of high and low temperature environments is generally achieved by introducing gases, but it will generate high-frequency airflow whistles, which may trigger submarine microseisms; at the same time, the compressed air introduced will affect the later sequestration quality of carbon dioxide gas, resulting in relatively low formation strength.

[0004] Technical Solution: A gas-phase balanced carbon dioxide replacement methane gas extraction device of the present invention includes an extraction assembly, which includes an extraction drill bit. A gas guide pipe is arranged inside the extraction drill bit. A thermoacoustic refrigerator is fixed at the top of the extraction drill bit. A high-temperature pipe is arranged inside the extraction drill bit, and its top end is communicated with the bottom of the thermoacoustic refrigerator. One side of the bottom of the thermoacoustic refrigerator is communicated with a low-temperature pipe, and a heat sink is fixed at the end of the low-temperature pipe; and a storage assembly is arranged at the top of the extraction drill bit, which includes a guide plate arranged at the top of the extraction drill bit. An air vent is opened on one side of the gas guide pipe, and a fixed frame is fixed inside the air vent. A valve member is arranged inside the fixed frame, and a trigger member is arranged on one side of the fixed frame. Guide rings are fixed on both sides of the top of the guide plate, and a rope slides inside them. The top of the rope is fixed with a flexible plate, and a guiding member is arranged on the flexible plate, and a storage bag is fixed at the end of the guiding member.

[0005] Furthermore, a cooling groove is opened at the top of the storage bag of the device, which cooperates with the heat sink.

[0006] Furthermore, the storage component of the device further includes a reinforcing rib fixed between the two guiding rings, and a reinforcing rib is fixed on the top of the reinforcing rib.

[0007] Furthermore, the valve member of the device includes a mounting plate fixed within a fixed frame. A rectangular groove is formed within the mounting plate. A fixed valve plate is fixed to the bottom of the inner wall of the fixed frame. An inclined plate slides within the mounting plate. A movable valve plate is fixed to the bottom of the inclined plate and cooperates with the fixed valve plate. The top of the inclined plate is located within the rectangular groove.

[0008] Furthermore, the valve member of the device further includes first springs fixed to both sides of the bottom of the movable valve plate, and the bottom ends thereof are fixed to the inner wall of the fixed frame.

[0009] Furthermore, the triggering member of the device includes a mounting groove formed in the top of the fixed frame, and a baffle slides within it. A connecting rope is fixed to the top of the baffle.

[0010] Furthermore, the triggering member of the device further includes limiting blocks fixed to both sides of the bottom of the baffle. A limiting groove cooperating with it is formed in the bottom of the mounting groove. A second spring is fixed to the top of the limiting block, and the top end thereof is fixed to the inner wall of the limiting groove.

[0011] Furthermore, the guiding member of the device includes a connecting plate provided on the flexible plate. A guiding plate is fixed to one side of the connecting plate and cooperates with the inclined plate. A connecting pipe communicates with one side of the connecting plate, and the end thereof communicates with the storage bladder.

[0012] Furthermore, the guiding member of the device further includes mounting holes formed on the surface of the flexible plate. A fixing bolt is provided at the bottom of the connecting plate and cooperates with the mounting holes.

[0013] Furthermore, in the construction method, it includes the mining device as described in any one of the claims, and further includes the following construction steps:

[0014] Transport the device to the methane gas mining position through a mining drill bit;

[0015] The hot gas generated by the thermoacoustic refrigerator is conducted to the combustible ice area through a high-temperature pipe for melting operation, so that the methane gas enters the gas guide pipe;

[0016] The ventilation hole conducts the methane gas into the storage bladder, and a low-temperature environment is formed in the storage bladder through a low-temperature pipe, so that the methane gas forms a solid state;

[0017] Pull the rope and the connecting rope, so that the full storage bladder is lifted to the ground along with the rope, and at the same time, the empty storage bladder is automatically installed;

[0018] Repeat the operation of taking out and installing the storage bladder until all the methane gas is extracted.

[0019] Advantageous effects: Compared with the prior art, the significant advantages of the present invention are as follows: Through the cooperation of the thermoacoustic refrigerator and the storage component, the combustible ice is first melted into a gaseous state and then formed into a solid state by low temperature for transportation. Compared with the gas transportation method, the transportation method of the present invention is more stable and efficient, and at the same time, it avoids the losses and safety problems brought by gas pipeline transportation. Brief Description of the Drawings

[0020] Figure 1 It is the overall structure diagram of the gas-phase equilibrium type carbon dioxide replacement methane gas extraction device and construction method;

[0021] Figure 2 It is the structure diagram of the storage component of the gas-phase equilibrium type carbon dioxide replacement methane gas extraction device and construction method;

[0022] Figure 3 It is another perspective view of the storage component of the gas-phase equilibrium type carbon dioxide replacement methane gas extraction device and construction method;

[0023] Figure 4 It is the structure diagram of the valve part of the gas-phase equilibrium type carbon dioxide replacement methane gas extraction device and construction method;

[0024] Figure 5 It is the cross-sectional view of the valve part of the gas-phase equilibrium type carbon dioxide replacement methane gas extraction device and construction method;

[0025] Figure 6 It is another perspective view of the valve part of the gas-phase equilibrium type carbon dioxide replacement methane gas extraction device and construction method;

[0026] Figure 7 It is the cross-sectional view of the trigger part of the gas-phase equilibrium type carbon dioxide replacement methane gas extraction device and construction method;

[0027] Figure 8 It is the structure diagram of the guiding part of the gas-phase equilibrium type carbon dioxide replacement methane gas extraction device and construction method. Detailed Embodiments

[0028] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that can be included in at least one implementation manner of the present invention. The "in one embodiment" that appears in different places in this specification does not all refer to the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0030] Embodiment 1

[0031] Refer to Figure 1 and Figure 2, which is the first embodiment of the present invention. This embodiment provides a gas-phase balanced carbon dioxide replacement methane gas extraction device and construction method. The gas-phase balanced carbon dioxide replacement methane gas extraction device and construction method include an extraction assembly 100 and a storage assembly 200. The extraction assembly 100 is used to extract methane gas, and at the same time, the storage assembly 200 can form methane gas into a solid state for transportation, improving the stability and convenience of transportation.

[0032] Specifically, the extraction assembly 100 includes an extraction drill bit 101. A gas guide pipe 102 is arranged inside the extraction drill bit 101. A thermoacoustic refrigerator 103 is fixed at the top of the extraction drill bit 101. The specific working principle of the thermoacoustic refrigerator 103 is prior art, and those skilled in the art can clearly understand it, so it will not be elaborated here. A high-temperature pipe 104 is arranged inside the extraction drill bit 101, and its top end is communicated with the bottom of the thermoacoustic refrigerator 103. The high-temperature pipe 104 can introduce hot gas into the combustible ice area to achieve the effect of melting the combustible ice. This part is also prior art. One side of the bottom of the thermoacoustic refrigerator 103 is communicated with a low-temperature pipe 105. A heat sink 106 is fixed at the end of the low-temperature pipe 105. The low-temperature pipe 105 and the heat sink 106 are used to provide a low-temperature environment during the process of forming methane gas into a solid state, without the need to provide additional energy.

[0033] The storage assembly 200 is arranged at the top of the extraction drill bit 101 and includes a guide plate 201 arranged at the top of the extraction drill bit 101. Oblique plates are fixed on both sides of the guide plate 201 to push the surrounding soil outward during the progress of the extraction drill bit 101 to prevent it from interfering with the transportation operation of methane gas. An air vent 202 is opened on one side of the gas guide pipe 102. A fixing frame 203 is fixed inside the air vent 202. A valve member 204 is arranged inside the fixing frame 203. The valve member 204 is used to block the air vent 202 when methane gas is not being transported to prevent too much seawater from entering the gas guide pipe 102.

[0034] A trigger member 205 is arranged on one side of the fixing frame 203. Guide rings 206 are fixed on both sides of the top of the guide plate 201. A rope 207 slides inside the guide rings 206. A flexible plate 208 is fixed at the top of the rope 207. The guide rings 206 are used to guide and limit the rope 207 and the flexible plate 208, facilitating the staff to pull, and also facilitating the fixation of the position where methane gas is ejected during the pulling process. A guiding member 209 is arranged on the flexible plate 208. A storage bag 210 is fixed at the end of the guiding member 209. The trigger member 205 is used to limit the guiding member 209 to prevent the storage bag 210 from shifting during the gas storage process. The guiding member 209 is used to fix the storage bag 210 on the flexible plate 208. Thus, by pulling the rope 207 and the flexible plate 208, the full storage bag 210 can be pulled out, and at the same time, the storage bag 210 to be stored can be pulled to the designated position to continue the collection of methane gas.

[0035] Among them, a plurality of pulleys can be arranged on the inner wall of the guide ring 206 to reduce the friction between the rope 207 and it during movement, making the installation of the device more convenient. This part is not shown in the figure. And when the trigger 205 limits the guide member 209, the rope 207 is in a taut state, thereby preventing the storage bladder 210 from shifting or falling.

[0036] The formation of methane hydrate depends on the sufficient contact between methane molecules and water molecules under high pressure and low temperature. The key to uniform filling lies in maximizing the contact area and promoting diffusion. Using porous materials (such as silica gel, activated carbon or ice powder) as carriers, their high specific surface area can adsorb water molecules and disperse methane gas, forming a uniform micro-scale reaction interface. This material is arranged inside the storage bladder 210. At the same time, a low-temperature environment is provided for the storage bladder 210 through the low-temperature tube 105 and the heat sink 106. And the water pressure in the ocean forms a high-pressure environment. Therefore, methane gas can form methane hydrate in the storage bladder 210, improving its storage efficiency and facilitating efficient transportation by the staff. The working principle of this part is the prior art, which can be clearly understood by those skilled in the art and selected according to the actual situation, so it will not be elaborated here.

[0037] Embodiment 2

[0038] Refer to Figures 1 to 8 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0039] Specifically, a cooling groove 211 is opened at the top of the storage bladder 210, which cooperates with the heat sink 106. The cooling groove 211 is rectangular. When the storage bladder 210 is installed at the position for storing methane gas, the heat sink 106 will be stuck in the cooling groove 211, thereby conducting the low temperature into the storage bladder 210 to provide a low-temperature environment for methane gas.

[0040] The storage assembly 200 further includes a reinforcing rib 212 fixed between the two guide rings 206. A reinforcing rib 213 is fixed at the top of the reinforcing rib 212. The reinforcing rib 212 and the reinforcing rib 213 are used to improve the strength of the flexible plate 208 between the two guide rings 206, avoiding large deformation caused by the gravity of the storage bladder 210 pressing on it, which affects the accuracy of the installation position of the storage bladder 210. The reinforcing rib 213 is arranged vertically, thereby further reducing the deformation amount of the flexible plate 208 shifting to the side, making the storage bladder 210 move more precisely.

[0041] The valve member 204 includes a mounting plate 2041 fixed within the fixed frame 203. A rectangular groove 2042 is formed in the mounting plate 2041. A fixed valve plate 2043 is fixed to the bottom of the inner wall of the fixed frame 203. An inclined plate 2044 slides within the mounting plate 2041. A movable valve plate 2045 is fixed to the bottom of the inclined plate 2044 and cooperates with the fixed valve plate 2043. A sealing treatment is performed between the fixed valve plate 2043 and the movable valve plate 2045. The top of the inclined plate 2044 is located within the rectangular groove 2042. The inclined plate 2044 and the movable valve plate 2045 can move up and down, and the inclined plate 2044 is always located within the rectangular groove 2042 and the mounting plate 2041. When the inclined plate 2044 and the movable valve plate 2045 move downward, the ventilation hole 202 can be opened, and methane gas can flow through.

[0042] The valve member 204 further includes first springs 2046 fixed to both sides of the bottom of the movable valve plate 2045. Their bottom ends are fixed to the inner wall of the fixed frame 203. The first springs 2046 apply an upward thrust to the movable valve plate 2045 and the inclined plate 2044, making the reset of the movable valve plate 2045 more convenient and improving the sealing effect between the movable valve plate 2045 and the fixed valve plate 2043.

[0043] The triggering member 205 includes a mounting groove 2051 formed in the top of the fixed frame 203. A baffle 2052 slides within it. A connecting rope 2053 is fixed to the top of the baffle 2052. The baffle 2052 is rectangular and serves as a blocking function to prevent the guiding member 209 from disengaging from the fixed frame 203 during use. The other end of the connecting rope 2053 extends to the water surface and is pulled by the staff. When the methane gas in the storage bladder 210 is full, the staff pulls the connecting rope 2053 to drive the baffle 2052 to move into the mounting groove 2051, so that the guiding member 209 can be pulled out of the rectangular groove 2042 by the rope 207.

[0044] The triggering member 205 further includes limiting blocks 2054 fixed to both sides of the bottom of the baffle 2052. A limiting groove 2055 is formed at the bottom of the mounting groove 2051 and cooperates with them. A second spring 2056 is fixed to the top of the limiting block 2054, and its top end is fixed to the inner wall of the limiting groove 2055. The baffle 2052 can be limited by the limiting block 2054 and the limiting groove 2055 to prevent it from disengaging from the mounting groove 2051. The second spring 2056 applies a downward thrust to the baffle 2052. When the staff releases the connecting rope 2053, the baffle 2052 can be driven by the second spring 2056 to reset for the blocking function.

[0045] The guiding member 209 includes a connecting plate 2091 provided on the flexible plate 208. A guiding plate 2092 is fixed to one side of the connecting plate 2091 and cooperates with the inclined plate 2044. A connecting pipe 2093 is communicated with one side of the connecting plate 2091, and its end is communicated with the storage bladder 210.

[0046] During the movement of the storage bladder 210, the connecting plate 2091 and the guiding plate 2092 can slowly enter the rectangular groove 2042, and the inclined plate 2044 is pushed downward by the guiding plate 2092 to open the ventilation hole 202. Methane gas is introduced into the connecting pipe 2093 through the ventilation hole 202 and then enters the storage bladder 210 for storage.

[0047] The guiding member 209 further includes a mounting hole 2094 formed on the surface of the flexible plate 208. A fixing bolt 2095 is provided at the bottom of the connecting plate 2091, which cooperates with the mounting hole 2094.

[0048] The disassembly and assembly efficiency of the connecting plate 2091 is higher through the mounting hole 2094 and the fixing bolt 2095, and it can be installed on the flexible plate 208 more conveniently and stably.

[0049] Embodiment 3

[0050] Refer to Figures 1 to 8 , which is the third embodiment of the present invention, and this embodiment is based on the first two embodiments.

[0051] Specifically, the following construction steps are further included:

[0052] The device is transported to the methane gas extraction position by the mining drill bit 101, and the rope 207 and the flexible plate 208 are manually pulled. The storage bladder 210 is pulled to the designated position by the rope 207, so that the guiding plate 2092 enters the rectangular groove 2042 and pushes the inclined plate 2044 downward to open the ventilation hole 202. At the same time, the guiding plate 2092 is blocked and limited by the baffle 2052 to prevent the storage bladder 210 from deviating during the collection of methane gas;

[0053] The hot gas generated by the thermoacoustic refrigerator 103 is conducted to the combustible ice area through the high-temperature pipe 104 for melting operation, so that methane gas enters the gas guide pipe 102.

[0054] The ventilation hole 202 introduces methane gas into the storage bladder 210, and a low-temperature environment is formed in the storage bladder 210 through the low-temperature pipe 105 to make the methane gas form a solid state.

[0055] The rope 207 and the connecting rope 2053 are pulled, and the baffle 2052 is driven to move into the installation groove 2051 through the connecting rope 2053, so that the guiding member 209 can be pulled out of the rectangular groove 2042 by the rope 207. At this time, the storage bladder 210 is driven to move by the rope 207, so that the full storage bladder 210 is lifted to the ground along with the rope 207, and at the same time, the empty storage bladder 210 is automatically installed;

[0056] The operation of taking out and installing the storage bladder 210 is cycled until all the methane gas is extracted.

Claims

1. A gas-phase equilibrium carbon dioxide replacement methane gas extraction device, characterized in that: Comprising, An extraction assembly (100), including an extraction drill bit (101), a gas guide pipe (102) is arranged inside the extraction drill bit (101), a thermoacoustic refrigerator (103) is fixed at the top of the extraction drill bit (101), a high-temperature pipe (104) is arranged inside the extraction drill bit (101), the top end of which is communicated with the bottom of the thermoacoustic refrigerator (103), one side of the bottom of the thermoacoustic refrigerator (103) is communicated with a low-temperature pipe (105), and a heat sink (106) is fixed at the end of the low-temperature pipe (105); and, A storage assembly (200), arranged at the top of the extraction drill bit (101), including a guide plate (201) arranged at the top of the extraction drill bit (101), a ventilation hole (202) is opened on one side of the gas guide pipe (102), a fixed frame (203) is fixed inside the ventilation hole (202), a valve member (204) is arranged inside the fixed frame (203), a trigger member (205) is arranged on one side of the fixed frame (203), guide rings (206) are fixed on both sides of the top of the guide plate (201), a rope (207) slides inside thereof, a flexible plate (208) is fixed at the top of the rope (207), a guiding member (209) is arranged on the flexible plate (208), and a storage bladder (210) is fixed at the end of the guiding member (209).

2. The gas-phase equilibrium carbon dioxide replacing methane gas extraction device according to claim 1, characterized in that: A cooling groove (211) is opened at the top of the storage bladder (210), which cooperates with the heat sink (106).

3. The gas-phase equilibrium carbon dioxide replacing methane gas production device according to claim 1 or 2, characterized in that: The storage assembly (200) further includes a reinforcing rib (212) fixed between the two guide rings (206), and a reinforcing rib (213) is fixed at the top of the reinforcing rib (212).

4. The gas-phase equilibrium carbon dioxide replacement methane gas extraction device according to claim 3, wherein: The valve member (204) includes a mounting plate (2041) fixed inside the fixed frame (203), a rectangular groove (2042) is opened inside the mounting plate (2041), a fixed valve plate (2043) is fixed at the bottom of the inner wall of the fixed frame (203), an inclined plate (2044) slides inside the mounting plate (2041), a movable valve plate (2045) is fixed at the bottom of the inclined plate (2044), which cooperates with the fixed valve plate (2043), and the top of the inclined plate (2044) is located inside the rectangular groove (2042).

5. The gas-phase equilibrium carbon dioxide replacement methane gas extraction device according to claim 4, wherein: The valve member (204) further includes first springs (2046) fixed on both sides of the bottom of the movable valve plate (2045), and the bottom ends thereof are fixed to the inner wall of the fixed frame (203).

6. The gas-phase equilibrium carbon dioxide replacement methane gas extraction device according to claim 5, characterized in that: The trigger member (205) includes a mounting groove (2051) opened at the top of the fixed frame (203), a baffle (2052) slides inside thereof, and a connecting rope (2053) is fixed at the top of the baffle (2052).

7. The gas-phase equilibrium carbon dioxide replacing methane gas extraction device according to claim 6, wherein: The trigger member (205) further includes limit blocks (2054) fixed at the bottoms of both sides of the baffle (2052), a limit groove (2055) matched with the mounting groove (2051) is opened at the bottom of the mounting groove (2051), and second springs (2056) are fixed at the tops of the limit blocks (2054), and the top ends thereof are fixed to the inner wall of the limit groove (2055).

8. The gas-phase equilibrium carbon dioxide replacement methane gas extraction device according to claim 7, characterized in that: The guiding member (209) includes a connecting plate (2091) disposed on the flexible plate (208). A guiding plate (2092) is fixed to one side of the connecting plate (2091), which cooperates with the inclined plate (2044). A connecting pipe (2093) communicates with one side of the connecting plate (2091), and the end thereof communicates with the storage bladder (210).

9. The gas-phase equilibrium carbon dioxide replacement methane gas extraction device according to claim 8, characterized in that: The guiding member (209) further includes a mounting hole (2094) formed on the surface of the flexible plate (208). A fixing bolt (2095) is disposed at the bottom of the connecting plate (2091), which cooperates with the mounting hole (2094).

10. A gas-phase equilibrium type carbon dioxide replacement methane gas extraction device and construction method, characterized in that: It includes the mining device according to any one of claims 1-9, and further includes the following construction steps: The device is conveyed to the methane gas mining position by the mining drill bit (101); The hot gas generated by the thermoacoustic refrigerator (103) is conducted to the combustible ice area through the high-temperature pipe (104) for melting operation, so that the methane gas enters the gas guide pipe (102); The methane gas is introduced into the storage bladder (210) through the ventilation hole (202). A low-temperature environment is formed in the storage bladder (210) through the low-temperature pipe (105), so that the methane gas forms a solid state; The rope (207) and the connecting rope (2053) are pulled, so that the full storage bladder (210) is lifted to the ground along with the rope (207), and at the same time, the empty storage bladder (210) is automatically installed; The operation of taking out and installing the storage bladder (210) is cycled until all the methane gas is extracted.

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