Circulation system for enhanced thermal co2 drive sequestration by pressurization

Abstract

The present application relates to coal bed gas extraction technical field, specifically is through pressurization promotes the circulating system of hot CO2 gas displacement and storage, the present application includes the bottom plate, the bottom plate upper end surface is close to one end position and is installed with the extraction pump one, the extraction pump one one end is fixedly connected with the communicating pipe one, the extraction pump one other end is fixedly connected with the communicating pipe two, the communicating pipe one outside is provided with the heat preservation mechanism, the bottom plate upper end surface is close to the middle part position and is fixedly installed with the branch plate and the separation device, the present application over will inject hot carbon dioxide with pressurization in the improvement gas extraction efficiency, also obtains and utilizes clean energy at the same time, reduces carbon emission, plays the result of multiple reinforcement extraction, through setting heat preservation mechanism, can reduce the heat emission of hot CO2 in the extraction process, and sets up the connector with the flexible hose, makes the extraction position of connector more flexible, the suitability is stronger, is favorable to the extraction operation of the circulating system.

Description

Technical Field

[0001] This invention relates to the field of coalbed methane extraction technology, specifically a circulation system that promotes thermal CO2 extraction and storage through pressurization. Background Technology

[0002] Coalbed methane extraction refers to the process of extracting coalbed methane from coal seams. Coalbed methane is an unconventional natural gas with methane as its main component. It is mainly adsorbed in coal seams and is a gas resource released during coal mining. Coalbed methane is a gas resource associated with coal, and its main component is methane. It belongs to unconventional natural gas.

[0003] In existing technologies, methods such as absorbing methane through alkaline leaching and then injecting it underground for storage, or converting CO2 into carbon monoxide and collecting it underground through a conversion device, cannot achieve the goal of methane extraction. These methods have a single utilization mode and cannot effectively utilize underground waste materials, residual heat energy, and space. Furthermore, the conditions in the goaf areas of underground closed abandoned mines are poor. Contaminated mine water can cause groundwater pollution through faults, fissures, collapse columns, and poorly sealed drill holes, or it can seep through these fissures and contaminate nearby normally operating mines. Summary of the Invention

[0004] The purpose of this invention is to provide a circulation system that promotes thermal CO2 gas extraction and storage through pressurization, in order to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A circulation system for promoting the storage of thermal CO2 through pressurization includes a base plate. A first extraction pump is installed on the upper surface of the base plate near one end. One end of the first extraction pump is fixedly connected to a first connecting pipe, and the other end is fixedly connected to a second connecting pipe. An insulation mechanism is provided outside the first connecting pipe. A support plate and a separation device are fixedly installed on the upper surface of the base plate near the middle. A second extraction pump is installed on the upper surface of the support plate. One end of the second extraction pump is fixedly connected to an extraction pipe, and the other end is fixedly connected to an extraction pipe. A winding mechanism is provided at the top inside the base plate. A third and a fourth extraction pump are installed on the upper surface of the base plate away from the first extraction pump. A pressurizing device is installed on one side of the upper surface of the base plate, and the pressurizing device is connected to the second connecting pipe.

[0007] The insulation mechanism includes two insulation shells, both of which are fitted onto the outside of the connecting pipe, and an insulation layer is inserted between the two insulation shells.

[0008] Preferably, the end of the extraction tube 1 away from the extraction pump 2 is fixedly connected to the separation device, one end of the extraction pump 4 is fixedly connected to the connecting tube 2, the other end of the extraction pump 4 is fixedly connected to the connecting tube 3, and the end of the connecting tube 3 away from the extraction pump 4 is fixedly connected to the separation device.

[0009] Preferably, one end of the extraction pump three is fixedly connected to a connecting pipe four, the other end of the extraction pump three is fixedly connected to a connecting pipe one, and the end of the connecting pipe four away from the extraction pump three is fixedly connected to the separation device.

[0010] Preferably, one of the insulation shells has a connecting plate fixedly connected to both outer side walls, and the other insulation shell has a connecting frame fixedly connected to both outer side walls. Insert plates are inserted into both connecting frames, and the bottom ends of the insert plates are fixedly connected to the connecting plates.

[0011] Preferably, a plurality of screws are fixedly connected to the upper surface of the insert plate, and a stop block is sleeved on the outside of each screw. A nut is fixedly connected to the inner wall of the stop block and located outside the screw. The inner wall of the nut is threaded with thread one, and the outer wall of the screw is threaded with thread two, and thread one and thread two cooperate with each other.

[0012] Preferably, a second insulation layer is fixedly connected inside the insert plate and outside the first connecting pipe, a third insulation layer is installed inside the second insulation layer and outside the first connecting pipe, and a plurality of spring pieces are installed between the outer wall of the third insulation layer and the inner wall of the second insulation layer.

[0013] Preferably, the winding mechanism includes a winding shaft and a limiting plate. Two connecting plates are fixedly connected to the top of the bottom plate. The winding shaft is rotatably connected between the two connecting plates. A telescopic hose is wound around the outside of the winding shaft, and one end of the telescopic hose is fixedly connected to the extraction tube.

[0014] Preferably, the limiting plate is fixedly connected to the outer wall of one of the connecting plates, the end of the telescopic hose away from the extraction tube is fixedly connected to a connector, the upper surface of the limiting plate is rotatably connected to a stop via a shaft, and the upper surface of the limiting plate is fixedly connected to a fixing plate, with the fixing plate fitting into one end of the stop.

[0015] Preferably, the two outer side walls of the fixing plate are provided with movable grooves near the upper surface, and a locking block is inserted into each of the two movable grooves. A return spring is installed between one end of the locking block and the inner wall of the movable groove.

[0016] The beneficial effects of this invention are:

[0017] 1. This invention extracts industrially generated thermal CO2 using a single extraction pump and connecting pipe 1. After pressurization, the CO2 is injected into an underground coal seam to fracture it, displacing adsorbed methane. The carbon dioxide is then sealed within the closed underground space of the mine or the coal seam. A second extraction pump, along with a second extraction pipe, a flexible hose, and a connector, draws the CO2 and methane through the extraction pipe 1 into a separation device. This device separates the CO2 and methane in the mixed gas. A fourth extraction pump, along with a third connecting pipe, extracts the methane, which is then extracted through the second connecting pipe for further CO2 generation in power generation. The separated CO2... By using pump three in conjunction with connecting pipe four, CO2 is extracted from the separation device and flows out from connecting pipe one, continuing to circulate in the system pipeline. Through the above operations, by pressurizing CO2 to supercritical level and then injecting it, the permeability of the coal seam can be effectively improved, and the gas extraction efficiency can be increased. By injecting heated carbon dioxide under pressure, the gas extraction efficiency can be improved, and underground waste materials, residual heat energy, and space can be fully utilized to seal CO2 underground. This fully utilizes residual heat energy, abundant underground space, and waste materials, while also obtaining and utilizing clean energy and reducing carbon emissions. The combination of increased permeability, strong adsorption of CO2, and heat injection results in multiple enhanced extraction effects.

[0018] 2. The present invention uses insulation layer two, insulation layer three, and two other insulation shells to insulate the connecting pipe one, so that the heat of the heated carbon dioxide is dissipated when it is extracted. In addition, the spring sheet can deform insulation layer three and squeeze the spring sheet when the connecting pipe one expands due to heat. Under the action of the spring sheet's rebound force, the expansion force can be buffered, preventing the connecting pipe one from being wrapped too tightly and unable to be buffered during expansion, which would lead to damage.

[0019] 3. By rotating one end of the stop block out of the fixed plate and moving the two locking blocks into the movable groove, the fixing between the stop block and the fixed plate can be released, thus releasing the fixing of the connector. Then, the connector can be moved out of the limiting plate and the telescopic hose can be unwound from the winding shaft, allowing the connector to be moved to the position to be extracted. This makes the extraction position of the connector more flexible and applicable, which is beneficial to the extraction operation of the circulation system. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a system diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 3 This is a schematic diagram of the separation device and the extraction pump 2 in this invention;

[0024] Figure 4 This is a schematic diagram of the structure of the heat insulation shell and the connecting pipe in this invention;

[0025] Figure 5 This is a partial structural schematic diagram of the present invention;

[0026] Figure 6 In this invention Figure 4 Enlarged view of point A in the middle;

[0027] Figure 7 This is a partial structural diagram of the insulation layer and the spring sheet in this invention;

[0028] Figure 8 This is a schematic diagram of the structure of the telescopic hose and the limiting plate in this invention;

[0029] Figure 9 This is a schematic diagram of the structure of the limiting plate and the stop block in this invention.

[0030] The attached figures are labeled as follows:

[0031] 1. Base plate; 2. Extraction pump one; 3. Connecting pipe one; 4. Connecting pipe two; 5. Separation device; 6. Extraction pump two; 7. Support plate; 8. Extraction pipe one; 9. Extraction pump three; 10. Connecting pipe one; 11. Extraction pump four; 12. Connecting pipe two; 13. Connecting pipe three; 14. Connecting pipe four; 15. Extraction pipe two; 16. Telescopic flexible hose; 17. Insulation shell; 18. Connecting frame; 19. Connecting plate; 20. Stop block; 21. Screw; 22. Nut; 23. Insert plate; 24. Insulation layer one; 25. Insulation layer two; 26. Insulation layer three; 27. Spring piece; 28. Winding shaft; 30. Fixing plate; 31. Clamping block; 32. Limiting plate; 33. Connector; 34. Pressurizing device. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] A circulation system that promotes thermal CO2 extraction and storage through pressurization, such as... Figures 1-9As shown, the device includes a base plate 1. A pump 2 is installed on the upper surface of the base plate 1 near one end. One end of the pump 2 is fixedly connected to a connecting pipe 3, and the other end is fixedly connected to a connecting pipe 4. An insulation mechanism is installed outside the connecting pipe 3. A pressurizing device 34 is installed on the upper surface of the base plate 1 near one side and is connected to the connecting pipe 4. A support plate 7 and a separation device 5 are fixedly installed on the upper surface of the base plate 1 near the middle. A second extraction pump 6 is installed on the upper surface. One end of the second extraction pump 6 is fixedly connected to an extraction tube 8, and the other end of the second extraction pump 6 is fixedly connected to an extraction tube 15. A winding mechanism is provided at the top of the inside of the base plate 1. A third extraction pump 9 and a fourth extraction pump 11 are installed on the upper surface of the base plate 1 away from the first extraction pump 2. The insulation mechanism includes two insulation shells 17. Both insulation shells 17 are fitted outside the connecting tube 3. An insulation layer 24 is inserted between the two insulation shells 17.

[0034] One end of the extraction pipe 8, away from the extraction pump 2 6, is fixedly connected to the separation device 5. One end of the extraction pump 4 11 is fixedly connected to the connecting pipe 2 12, and the other end of the extraction pump 4 11 is fixedly connected to the connecting pipe 3 13. The end of the connecting pipe 3 13 away from the extraction pump 4 11 is fixedly connected to the separation device 5. One end of the extraction pump 3 9 is fixedly connected to the connecting pipe 4 14, and the other end of the extraction pump 3 9 is fixedly connected to the connecting pipe 1 10. The end of the connecting pipe 4 14 away from the extraction pump 3 9 is fixedly connected to the separation device 5.

[0035] In operation, extraction pump 2, in conjunction with connecting pipe 3, extracts industrially generated hot CO2. This CO2 is then pressurized via pressurization device 34 and injected into underground coal seams through connecting pipe 4 to fracture the coal seams. This displaces the adsorbed methane from the coal seams, while carbon dioxide is sealed within the closed underground space of the mine or the coal seam. When the injected carbon dioxide reaches a certain level, the extracted gas will contain a mixture of carbon dioxide and methane. Extraction pump 6, in conjunction with extraction pipe 15, telescopic hose 16, and connector 33, then extracts the carbon dioxide and methane through extraction pipe 8 into separation device 5. Separation device 5 separates the CO2 and methane in the mixed gas. Finally, extraction pump 11, in conjunction with connecting pipe 13, extracts the methane, allowing it to dissolve. The CO2 is extracted through connecting pipe 2 12 and used for power generation to continue producing CO2. The separated CO2 is extracted from the separation device 5 through the extraction pump 3 9 and connecting pipe 4 14, and flows out through connecting pipe 1 10 to continue circulating in the system pipeline. Through the above operation, the permeability of the coal seam can be effectively improved and the gas extraction efficiency can be improved by injecting CO2 after pressurizing it to supercritical. By injecting heated carbon dioxide under pressure, the gas extraction efficiency can be improved, and the underground waste materials, residual heat energy and space can be fully utilized to seal CO2 underground. This fully utilizes the residual heat energy, the abundant underground space and waste materials, and also obtains and utilizes clean energy while reducing carbon emissions. The pressurization device 34 and the separation device 5 are existing technologies and will not be described in detail here.

[0036] One of the insulation shells 17 has connecting plates 19 fixedly connected to both outer side walls, and the other insulation shell 17 has connecting frames 18 fixedly connected to both outer side walls. Insert plates 23 are inserted into both connecting frames 18. The bottom end of the insert plate 23 is fixedly connected to the connecting plate 19. Several screws 21 are fixedly connected to the upper surface of the insert plate 23. Each screw 21 is fitted with a stop block 20. A nut 22 is fixedly connected to the inner wall of the stop block 20 and outside the screw 21. The inner wall of the nut 22 has a thread 1, and the outer wall of the screw 21 has a thread 2. The thread 1 and thread 2 cooperate with each other. Through the cooperation of the thread 1 and thread 2, the nut 22 can be tightly connected and fixed to the screw 21, so that the position of the stop block 20 is fixed and the position of the connecting frame 18 is blocked and limited.

[0037] A second insulation layer 25 is fixedly connected inside the insert plate 23 and outside the connecting pipe 3. A third insulation layer 26 is installed inside the second insulation layer 25 and outside the connecting pipe 3. Several spring pieces 27 are installed between the outer wall of the third insulation layer 26 and the inner wall of the second insulation layer 25. Both the second insulation layer 25 and the third insulation layer 26 are made of rubber.

[0038] Specifically, the connecting pipe 3 is insulated by the second insulation layer 25, the third insulation layer 26, and the other two insulation shells 17, so that the heat is dissipated when the heated carbon dioxide is extracted. In addition, the spring sheet 27 can deform the third insulation layer 26 and squeeze the spring sheet 27 when the connecting pipe 3 expands due to heat. Under the action of the spring sheet 27, the expansion force can be buffered, so as to prevent the connecting pipe 3 from being wrapped too tightly and not being buffered during expansion, which would lead to damage.

[0039] Rotate the stop block 20 by 90° so that the nut 22 rotates along the outside of the screw 21, releasing the fixation of the stop block 20. Similarly, rotate the other stops 20 by 90° to squeeze out the obstruction of the connecting frame 18. At this time, the connecting frame 18 can be removed from the insert plate 23, and the two insulation shells 17 can be separated. The insulation layer 1 24, insulation layer 25 and spring sheet 27 can be disassembled and inspected to avoid weakening of the rebound performance due to long-term use, which would affect the insulation and buffering performance. After the inspection is completed, the insulation shells 17 can be reinstalled in their original positions.

[0040] like Figures 7-8 As shown, the winding mechanism includes a winding shaft 28 and a limiting plate 32. Two connecting plates are fixedly connected to the top of the bottom plate 1. The winding shaft 28 is rotatably connected between the two connecting plates. A telescopic hose 16 is wound around the outside of the winding shaft 28, and one end of the telescopic hose 16 is fixedly connected to the extraction tube 15. The limiting plate 32 is fixedly connected to the outer wall of one of the connecting plates. A connector 33 is fixedly connected to the end of the telescopic hose 16 away from the extraction tube 15. A stop 20 is rotatably connected to the upper surface of the limiting plate 32 via a shaft. A fixing plate 30 is fixedly connected to the upper surface of the limiting plate 32, and the fixing plate 30 fits into one end of the stop 20. When the connector 33 is moved, the telescopic hose 16 can be stretched accordingly without hindering the movement of the connector 33.

[0041] The two outer side walls of the fixed plate 30 are provided with movable grooves near the upper surface. Each movable groove is fitted with a locking block 31, and a return spring is installed between one end of the locking block 31 and the inner wall of the movable groove.

[0042] Specifically, by rotating one end of the stop block 20 off the fixed plate 30, during the rotation process, the inner wall of the stop block 20 contacts the inclined surfaces of the two locking blocks 31 and squeezes the locking blocks 31, causing the two locking blocks 31 to move into the movable groove. The return spring is squeezed and contracted, which can release the fixation between the stop block 20 and the fixed plate 30, thereby releasing the fixation of the connector 33. At this time, the connector 33 can be moved out from inside the limiting plate 32, and the telescopic hose 16 can be unwound from the winding shaft 28. The connector 33 can be moved to the position to be extracted, making the extraction position of the connector 33 more flexible and more applicable, which is beneficial to the extraction operation of the circulation system.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A circulating system for promoting thermal CO2 gas extraction and storage through pressurization, comprising a base plate (1), characterized in that, A first extraction pump (2) is installed on the upper surface of the base plate (1) near one end. One end of the first extraction pump (2) is fixedly connected to a first connecting pipe (3), and the other end of the first extraction pump (2) is fixedly connected to a second connecting pipe (4). A heat preservation mechanism is provided on the outside of the first connecting pipe (3). A support plate (7) and a separation device (5) are fixedly installed on the upper surface of the base plate (1) near the middle. A second extraction pump (6) is installed on the upper surface of the support plate (7). Pump 2 (6) is fixedly connected to one end of extraction pipe 1 (8), and pump 2 (6) is fixedly connected to the other end of extraction pipe 2 (15). A winding mechanism is provided at the top of the inside of the base plate (1). Pump 3 (9) and pump 4 (11) are installed on the upper surface of the base plate (1) away from pump 1 (2). A pressurizing device (34) is installed on one side of the upper surface of the base plate (1), and the pressurizing device (34) is connected to the connecting pipe 2 (4). The insulation mechanism includes two insulation shells (17), both of which are sleeved on the outside of the connecting pipe (3), and an insulation layer (24) is inserted between the two insulation shells (17). The end of the extraction tube 1 (8) away from the extraction pump 2 (6) is fixedly connected to the separation device (5). One end of the extraction pump 4 (11) is fixedly connected to the connecting tube 2 (12), and the other end of the extraction pump 4 (11) is fixedly connected to the connecting tube 3 (13). The end of the connecting tube 3 (13) away from the extraction pump 4 (11) is fixedly connected to the separation device (5). One end of the extraction pump three (9) is fixedly connected to the connecting pipe four (14), and the other end of the extraction pump three (9) is fixedly connected to the connecting pipe one (10). The end of the connecting pipe four (14) away from the extraction pump three (9) is fixedly connected to the separation device (5). One of the insulation shells (17) has a connecting plate (19) fixedly connected to both outer side walls, and the other insulation shell (17) has a connecting frame (18) fixedly connected to both outer side walls. Both connecting frames (18) have insert plates (23) inserted inside, and the bottom end of the insert plate (23) is fixedly connected to the connecting plate (19). The upper surface of the insert plate (23) is fixedly connected with several screws (21), and a stop block (20) is sleeved on the outside of each screw (21). A nut (22) is fixedly connected to the inner wall of the stop block (20) and outside the screw (21). The inner wall of the nut (22) is provided with a thread one, and the outer wall of the screw (21) is provided with a thread two. The thread one and the thread two cooperate with each other. A second insulation layer (25) is fixedly connected inside the insert plate (23) and outside the connecting pipe (3). A third insulation layer (26) is installed inside the second insulation layer (25) and outside the connecting pipe (3). Several spring pieces (27) are installed between the outside of the third insulation layer (26) and the inner wall of the second insulation layer (25). The winding mechanism includes a winding shaft (28) and a limiting plate (32). Two connecting plates are fixedly connected to the top of the bottom plate (1). The winding shaft (28) is rotatably connected between the two connecting plates. A telescopic hose (16) is wound around the outside of the winding shaft (28), and one end of the telescopic hose (16) is fixedly connected to the extraction tube (15). The limiting plate (32) is fixedly connected to the outer wall of one of the connecting plates. The end of the telescopic hose (16) away from the extraction tube (15) is fixedly connected to the connector (33). The upper surface of the limiting plate (32) is rotatably connected to the stop (20) through the shaft. The upper surface of the limiting plate (32) is fixedly connected to the fixing plate (30), and the fixing plate (30) is engaged with one end of the stop (20). The two outer side walls of the fixed plate (30) are provided with movable grooves near the upper surface. Each movable groove is provided with a locking block (31). A reset spring is installed between one end of the locking block (31) and the inner wall of the movable groove. By rotating one end of the stop (20) off the fixed plate (30), during the rotation process, the inner wall of the stop (20) contacts the inclined surfaces of the two locking blocks (31) and squeezes the locking blocks (31), causing the two locking blocks (31) to move into the movable groove. The reset spring is squeezed and contracted, releasing the fixation between the stop (20) and the fixed plate (30), thereby releasing the fixation of the connector (33), moving the connector (33) out from the inside of the limiting plate (32), and unwinding the telescopic hose (16) from the winding shaft (28), moving the connector (33) to the position to be extracted.

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