Coal seam gas power generation gas collection device
By designing a gas collection device for coalbed methane power generation with adjustment and filtration mechanisms, the problem of air-fuel ratio imbalance caused by gas transmission pressure fluctuations was solved, thereby improving power generation efficiency and reducing operating costs.
Patent Information
- Application Number
- CN202521499880.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-17
- Publication Date
- 2026-07-14
- Estimated Expiration
- 2035-07-17
AI Technical Summary
The existing gas extraction equipment lacks pressure regulating components, which leads to fluctuations in gas transmission pressure, resulting in an imbalance in the air-fuel ratio and reducing the power generation efficiency of the generator set.
A gas collection device for coalbed methane power generation was designed, comprising a regulating mechanism and a filtering mechanism. The regulating mechanism adjusts the methane flow rate through a blocking block and a fixing ring, while the filtering mechanism removes coal dust and impurities through a filter plate and a scraper to ensure stable methane delivery.
This allows for the adjustment of the gas delivery gap, avoiding air-fuel ratio imbalance, improving the power generation efficiency of the generator set, and reducing equipment maintenance frequency and operating costs.
Smart Images
Figure CN224500087U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gas extraction, and more specifically, to a gas collection device for coal seam gas power generation. Background Technology
[0002] Gas extraction generally refers to a technology for extracting methane from coal mines or other underground mineral formations. Methane is the main component of coalbed methane, and if it is not removed in time during coal mining, it can cause serious safety accidents such as explosions. Generally, methane is extracted from coal mines or other underground mineral formations through drilling and extraction equipment, and then processed and utilized. This usually requires purification, compression, and conversion to ensure its safe release or effective use as an energy resource.
[0003] When existing extraction equipment is in use, the uneven distribution of gas in the coal seam causes the gas delivery pressure to change depending on the gas distribution. Since there is no corresponding pressure regulating component, the air-fuel ratio will be out of balance due to pressure fluctuations (such as excessive gas and incomplete combustion when the pressure rises sharply, and excessive air and reduced power when the pressure drops sharply), which reduces the power generation efficiency of the generator set.
[0004] Therefore, we have made improvements to this and proposed a gas collection device for coalbed methane power generation. Utility Model Content
[0005] The purpose of this invention is to solve the problem that the current extraction equipment does not have a corresponding voltage regulating component, which reduces the power generation efficiency of the generator set.
[0006] In order to achieve the above-mentioned utility model objectives and improve the above-mentioned problems, this utility model provides a gas collection device for coalbed methane power generation, including a box, an exhaust pipe connected to the inside of the box is fixedly connected to the top of the box, an air inlet pipe connected to the inside of the box is fixedly connected to one side of the box, an adjustment mechanism is provided inside the box, and a filter mechanism is provided on one side of the adjustment mechanism.
[0007] The adjustment mechanism includes a filter tube fixedly connected to the inner wall of the box. A rotating rod is rotatably connected inside the filter tube, penetrating the surface of the filter tube. One end of the rotating rod penetrates the surface of the box and is rotatably connected to the inside of the box. An elliptical push plate is fixedly connected to one end of the rotating rod inside the filter tube. A fixing ring is fixedly connected to the inner wall of the air intake pipe. A cone-shaped blocking block is slidably connected to the inner wall of the fixing ring. A movable plate is fixedly connected to the inner wall of the air intake pipe. A first spring is fixedly connected between the movable plate and the blocking block. The surface of the push plate is in contact with the surface of the movable plate.
[0008] As a preferred technical solution of this application, the surface of the blocking block is fixedly connected to two guide rods. The guide rods pass through the surface of the fixed ring and are slidably connected to the inside of the fixed ring. A second spring is movably sleeved on the surface of the guide rod, and the two ends of the second spring are fixedly connected to the surface of the fixed ring and the surface of the guide rod, respectively.
[0009] As a preferred technical solution of this application, both sides of the movable plate are fixedly connected with limit rods, and both limit rods slide through the surface of the fixed ring and are slidably connected to the inside of the fixed ring.
[0010] As a preferred technical solution of this application, an indicator needle is rotatably connected to the surface of the box, the rotating rod is fixedly connected to the inside of the indicator needle, a scale ring is fixedly connected to the surface of the box, and one end of the indicator needle is in contact with the inner wall of the scale ring.
[0011] As a preferred technical solution of this application, the inner wall of the filter tube has two through grooves arranged in a front-to-back manner.
[0012] As a preferred technical solution of this application, the filtration mechanism includes two filter plates arranged one in front of the other. The surface of the filter plates is fixedly connected to the inner wall of the filter tube. The two filter plates have the same structure. The two filter plates are rotatably connected to a rotating shaft that passes through the surface of the two filter plates. A turbine is fixedly connected to one end of the rotating shaft near the air inlet pipe. A baffle plate is fixedly connected to the surface of the rotating shaft. Two scrapers are fixedly connected to the surface of the rotating shaft. The opposite sides of the two scrapers are inclined surfaces, and the opposite sides of the two blockage blocks are vertical surfaces.
[0013] As a preferred technical solution of this application, a movable block with a convex cross-section is slidably connected inside the baffle plate. The movable block is located between two scrapers. A third spring is fixedly connected to the surface of the movable block. The end of the third spring away from the movable block is in contact with the surface of the filter plate. Both sides of the movable block are inclined surfaces, and the side of the movable block away from the filter plate is triangular.
[0014] As a preferred technical solution of this application, the inner wall of the filter tube is fixedly connected with a retaining ring with a conical inner wall, the retaining ring having a notch, and the triangular end of the moving block is in contact with the surface of the retaining ring.
[0015] As a preferred technical solution of this application, a cooler is fixedly connected to the inner wall of the box, the surface of the cooler wraps the filter tube, a water collection box is slidably connected to the inside of the box, a drain pipe connected to the inside of the cooler is fixedly connected to the surface of the cooler, the end of the drain pipe away from the cooler is located above the water collection box, a collection box is also connected to the inside of the box, the collection box is located directly below the two through slots, and activated carbon boxes are slidably connected to the inside of the box in an equidistant arrangement, the activated carbon boxes are located below the exhaust pipe.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0017] In the scheme of this application:
[0018] 1. By setting an adjustment mechanism, the size of the gas delivery gap can be adjusted, which solves the problem of air-fuel ratio imbalance caused by pressure fluctuation in the existing technology. It can keep the generator set at the optimal operating point and improve the power generation efficiency of subsequent generator sets. It is worth promoting.
[0019] 2. The filter mechanism effectively filters coal dust and impurities in the gas, preventing coal dust from moving to downstream equipment and affecting its operation. It also prevents coal dust and other impurities from clogging the filter plates, thus preventing safety hazards caused by gas accumulation. Furthermore, it reduces the frequency of manual maintenance, lowers operating costs, and improves work efficiency. Attached Figure Description
[0020] Figure 1 A schematic diagram of the gas collection device for coalbed methane power generation provided in this application;
[0021] Figure 2 A schematic diagram of the side of the housing in the gas collection device for coalbed methane power generation provided in this application;
[0022] Figure 3 The gas collection device for coalbed methane power generation provided in this application Figure 2 Enlarged structural diagram at point A in the middle;
[0023] Figure 4 A schematic diagram of the internal structure of the housing in the gas collection device for coalbed methane power generation provided in this application;
[0024] Figure 5 The gas collection device for coalbed methane power generation provided in this application Figure 4 Enlarged structural diagram at point B;
[0025] Figure 6 The gas collection device for coalbed methane power generation provided in this application Figure 4 Enlarged structural diagram at point C;
[0026] Figure 7 This is a schematic diagram of the internal structure of the filter tube in the gas collection device for coalbed methane power generation provided in this application.
[0027] The image shows:
[0028] 1. Box; 2. Exhaust pipe; 3. Intake pipe; 4. Activated carbon box; 5. Collection box; 6. Water collection box; 7. Scale ring; 8. Indicator needle; 9. Second spring; 10. Cooler; 11. Filter pipe; 12. Drain pipe; 13. Blocking block; 14. Fixing ring; 15. Guide rod; 16. First spring; 17. Movable plate; 18. Push plate; 19. Rotating rod; 20. Limiting rod; 21. Turbine; 22. Rotating shaft; 23. Scraper; 24. Filter plate; 25. Through groove; 26. Baffle plate; 27. Moving block; 28. Retaining ring; 29. Third spring. Detailed Implementation
[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the protection scope of the present invention.
[0030] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
[0031] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.
[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0033] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7A gas collection device for coal seam gas power generation includes a box 1. The top of the box 1 is fixedly connected to an exhaust pipe 2 that communicates with the inside of the box 1. An air inlet pipe 3 that communicates with the inside of the box 1 is fixedly connected to one side of the box 1, so that gas can be injected into the box 1 through the air inlet pipe 3 and discharged through the exhaust pipe 2. The air inlet pipe 3 is connected to a gas extraction pipeline through a flange, and the exhaust pipe 2 is also connected to a suction pipe through a flange, so that gas can be smoothly extracted from the coal seam. An adjustment mechanism is provided inside the box 1, and a filter mechanism is provided on one side of the adjustment mechanism.
[0034] Furthermore, such as Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the adjustment mechanism includes a filter tube 11 fixedly connected to the inner wall of the box 1. A rotating rod 19 is rotatably connected inside the filter tube 11, penetrating the surface of the filter tube 11. One end of the rotating rod 19 penetrates the surface of the box 1 and is rotatably connected to the inside of the box 1. An elliptical pusher disc 18 is fixedly connected to one end of the rotating rod 19 inside the filter tube 11. A fixing ring 14 is fixedly connected to the inner wall of the air inlet pipe 3. A cone-shaped blocking block 13 is slidably connected to the inner wall of the fixing ring 14 to block the fixing ring 14. A rubber pad is fixedly connected to the inner wall of the fixing ring 14 to seal the gap between the blocking block 13 and the fixing ring 14, so as to ensure the smooth operation of the device.
[0035] Two guide rods 15 are fixedly connected to the surface of the blockage block 13. The guide rods 15 pass through the surface of the fixed ring 14 and are slidably connected to the inside of the fixed ring 14 to guide the movement of the blockage block 13. A second spring 9 is movably sleeved on the surface of the guide rod 15. The two ends of the second spring 9 are fixedly connected to the surface of the fixed ring 14 and the surface of the guide rod 15, respectively, to reset the blockage block 13. A movable plate 17 is fixedly connected to the inner wall of the air intake pipe 3. A first spring 16 is fixedly connected between the movable plate 17 and the blockage block 13 to reset the blockage block 13. Limiting rods 20 are fixedly connected to both sides of the movable plate 17. Both limiting rods 20 pass through the surface of the fixed ring 14 and are slidably connected to the inside of the fixed ring 14 to guide the movement of the movable plate 17. The surface of the pusher disc 18 is in contact with the surface of the movable plate 17 to push the movable plate 17.
[0036] An indicator needle 8 is rotatably connected to the surface of box 1. A rotating rod 19 is fixedly connected to the inside of the indicator needle 8, so that when the second spring 9 rotates, it can synchronously drive the indicator needle 8 to rotate. A scale ring 7 is fixedly connected to the surface of box 1. One end of the indicator needle 8 contacts the inner wall of the scale ring 7, so that the operator can understand the rotation angle. A worm gear is provided at the end of the rotating rod 19 located outside box 1, so as to limit the rotation of the rotating rod 19, avoid the random rotation of the rotating rod 19, and ensure the stability of the device during use. The specific setting of the worm gear is a conventional technical means, so it will not be discussed in detail here.
[0037] Furthermore, such as Figure 4 , Figure 6 and Figure 7 As shown, the inner wall of the filter tube 11 has two through slots 25 arranged front and back for discharging the screened coal powder and other impurities. The filtration mechanism includes two filter plates 24 arranged front and back. The surface of the filter plates 24 is fixedly connected to the inner wall of the filter tube 11, and the two filter plates 24 have different pore sizes, so that the device can filter impurities of different sizes. The structures on the two filter plates 24 are the same. The interior of the two filter plates 24 is rotatably connected to a rotating shaft 22 that passes through the surface of the two filter plates 24. The end of the rotating shaft 22 near the air inlet pipe 3 is fixedly connected to a turbine 21. Thus, through the arrangement of the turbine 21, the rotating shaft 22 can be driven to rotate by the impact force of the gas on the turbine 21, thereby providing power for the operation of the device.
[0038] A baffle plate 26 is fixedly connected to the surface of the rotating shaft 22 to shield against the impact force of gas. Two scrapers 23 are fixedly connected to the surface of the rotating shaft 22. The opposite sides of the two scrapers 23 are inclined planes, and the opposite sides of the two blocking blocks 13 are vertical planes. This allows coal powder and other impurities to pass smoothly through the inclined planes of the scrapers 23 into the space between the two scrapers 23. Due to the vertical planes of the two scrapers 23, the impurities are not easily discharged, facilitating subsequent processing of the impurities. The scrapers 23 are covered by the baffle plate 26. A convex-shaped movable block 27 is slidably connected inside the baffle plate 26. The movable block 27 is located between the two scrapers. Between 23, a third spring 29 is fixedly connected to the surface of the movable block 27. The end of the third spring 29 away from the movable block 27 is in contact with the surface of the filter plate 24. Both sides of the movable block 27 are inclined, which facilitates the movable block 27 to scoop up impurities such as coal powder. The side of the movable block 27 away from the filter plate 24 is triangular. A retaining ring 28 with a conical inner wall is fixedly connected to the inner wall of the filter tube 11, which can guide and collect the extracted gas. The retaining ring 28 has a notch. The triangular end of the movable block 27 is in contact with the surface of the retaining ring 28. When the retaining ring 28 is in contact with the surface of the movable block 27, the third spring 29 is in a compressed state.
[0039] Furthermore, such as Figure 4 As shown, a cooler 10 is fixedly connected to the inner wall of the box 1. The surface of the cooler 10 wraps the filter tube 11, which can cool the extracted gas and condense some water. A water collection box 6 is slidably connected inside the box 1. A drain pipe 12 connected to the inside of the cooler 10 is fixedly connected to the surface of the cooler 10. The end of the drain pipe 12 away from the cooler 10 is located above the water collection box 6 to collect the condensed water. At the same time, it can also collect the water discharged from the filter tube 11. A collection box 5 is also connected inside the box 1. The collection box 5 is located directly below the two through slots 25 to collect the discharged coal dust and other impurities. Activated carbon boxes 4 are slidably connected inside the box 1 in an equidistant arrangement. The activated carbon boxes 4 are located below the exhaust pipe 2 and can further filter the extracted gas by placing activated carbon. At the same time, sealing gaskets are provided between the activated carbon boxes 4, the water collection box 6, and the collection box 5 and the box 1 to seal the gaps between them, prevent gas leakage, and ensure the smooth operation of the device.
[0040] The operation of the gas collection device for coalbed methane power generation provided by this utility model is as follows: When extracting methane, the operator first drives the rotating rod 19 to rotate via a worm gear, which in turn drives the push plate 18 to rotate. This causes the push plate 18 to push the movable plate 17, thereby pushing the blocking block 13 through the first spring 16. This causes the two guide rods 15 to slide in the fixed ring 14, compressing the two second springs 9. This prevents the blocking block 13 from blocking the fixed ring 14, allowing the methane to flow through the gap between the blocking block 13 and the fixed ring 14. Subsequently, by activating external equipment, the methane enters the box 1 through the inlet pipe 3. When the methane enters the inlet pipe 3 relatively smoothly, it pushes the blocking block 13, which in turn causes the two guide rods 15 to slide in the fixed ring 14. This causes the second springs 9 to gradually relax, while the first spring 16 is compressed. When the coalbed methane delivery pressure increases, the impact force of the methane causes the blocking block 13 to... As the fixed ring 14 moves closer, the gap between the blocking block 13 and the fixed ring 14 decreases, causing the first spring 16 to be compressed again and the second spring 9 to be relaxed again. This reduces the intake flow rate until the intake impact force returns to normal pressure. Under the elastic force of the first spring 16, the gap between the blocking block 13 and the fixed ring 14 returns to its original size. When the gas delivery pressure decreases, the first spring 16 causes the blocking block 13 to gradually move away from the fixed ring 14, increasing the gap between the blocking block 13 and the fixed ring 14 and increasing the intake flow rate. This allows the device to automatically adjust the gap between the blocking block 13 and the fixed ring 14 according to the gas delivery pressure, ensuring the stability of the gas extraction rate per unit time and avoiding air-fuel ratio imbalance caused by pressure fluctuations (such as excessive gas and incomplete combustion when the pressure rises sharply, and excessive air and power reduction when the pressure drops sharply). This ensures that the generator set always operates at the optimal operating point, improving the power generation efficiency of subsequent generator sets and enhancing the overall performance of the device.
[0041] When the gas enters the filter pipe 11, the coal dust and other impurities mixed in the gas are intercepted by the filter plate 24. The impact force of the gas during transportation impacts the turbine 21, thereby driving the rotating shaft 22 to rotate, which in turn drives the scraper 23, the baffle plate 26, and the moving block 27 to rotate. This allows the scraper 23 to scrape off the coal dust and other impurities intercepted on the surface of the filter plate 24, and allows the coal dust and other impurities to enter between the two scraper plates 23 along the inclined surface of the scraper 23 and fall onto the moving block 27. At the same time, as the baffle plate 26 rotates... The movement causes the triangular end of the movable block 27 to enter the notch of the retaining ring 28. At this time, under the elastic force of the third spring 29, the movable block 27 slides in the baffle plate 26, so that the movable block 27 no longer contacts the filter plate 24 and no longer blocks the passage 25. As a result, the coal powder and impurities fall into the collection box 5 through the passage 25 and are collected by the collection box 5. The gas is cooled by the cooler 10 after passing through the filter pipe 11, and then filtered by the activated carbon box 4 and discharged through the exhaust pipe 2.
[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0043] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.
Claims
1. A gas collection device for coal seam gas power generation, characterized in that, Includes a box (1), the top of the box (1) is fixedly connected to an exhaust pipe (2) that communicates with the inside of the box (1), one side of the box (1) is fixedly connected to an air inlet pipe (3) that communicates with the inside of the box (1), the inside of the box (1) is provided with an adjustment mechanism, and one side of the adjustment mechanism is provided with a filter mechanism. The adjustment mechanism includes a filter tube (11) fixedly connected to the inner wall of the box (1). A rotating rod (19) is rotatably connected inside the filter tube (11) and passes through the surface of the filter tube (11). One end of the rotating rod (19) passes through the surface of the box (1) and is rotatably connected to the inside of the box (1). An elliptical push plate (18) is fixedly connected to one end of the rotating rod (19) inside the filter tube (11). A fixing ring (14) is fixedly connected to the inner wall of the air inlet pipe (3). A cone-shaped blocking block (13) is slidably connected to the inner wall of the fixing ring (14). A movable plate (17) is fixedly connected to the inner wall of the air inlet pipe (3). A first spring (16) is fixedly connected between the movable plate (17) and the blocking block (13). The surface of the push plate (18) is in contact with the surface of the movable plate (17).
2. The gas collection device for coal seam gas power generation according to claim 1, characterized in that, Two guide rods (15) are fixedly connected to the surface of the blocking block (13). The guide rods (15) pass through the surface of the fixing ring (14) and are slidably connected to the inside of the fixing ring (14). A second spring (9) is movably sleeved on the surface of the guide rod (15). The two ends of the second spring (9) are fixedly connected to the surface of the fixing ring (14) and the surface of the guide rod (15), respectively.
3. The gas collection device for coal seam gas power generation according to claim 2, characterized in that, Both sides of the movable plate (17) are fixedly connected to limit rods (20), and both limit rods (20) slide through the surface of the fixed ring (14) and are slidably connected to the inside of the fixed ring (14).
4. The gas collection device for coal seam gas power generation according to claim 3, characterized in that, An indicator needle (8) is rotatably connected to the surface of the box (1). The rotating rod (19) is fixedly connected to the inside of the indicator needle (8). A scale ring (7) is fixedly connected to the surface of the box (1). One end of the indicator needle (8) is in contact with the inner wall of the scale ring (7).
5. A gas collection device for coal seam gas power generation according to claim 4, characterized in that, The inner wall of the filter tube (11) has two through grooves (25) arranged in a front-to-back manner.
6. The gas collection device for coal seam gas power generation according to claim 5, characterized in that, The filtration mechanism includes two filter plates (24) arranged one in front of the other. The surface of the filter plate (24) is fixedly connected to the inner wall of the filter tube (11). The two filter plates (24) have the same structure. The interior of the two filter plates (24) is rotatably connected to a rotating shaft (22) that passes through the surface of the two filter plates (24). A turbine (21) is fixedly connected to one end of the rotating shaft (22) near the air intake pipe (3). A baffle plate (26) is fixedly connected to the surface of the rotating shaft (22). Two scrapers (23) are fixedly connected to the surface of the rotating shaft (22). The opposite sides of the two scrapers (23) are inclined surfaces, and the opposite sides of the two blockage blocks (13) are vertical surfaces.
7. A gas collection device for coal seam gas power generation according to claim 6, characterized in that, The baffle plate (26) has a sliding connection inside with a convex cross section, the sliding block (27) is located between two scrapers (23), and a third spring (29) is fixedly connected to the surface of the sliding block (27). The end of the third spring (29) away from the sliding block (27) is in contact with the surface of the filter plate (24). Both sides of the sliding block (27) are inclined surfaces, and the side of the sliding block (27) away from the filter plate (24) is triangular.
8. A gas collection device for coal seam gas power generation according to claim 7, characterized in that, The inner wall of the filter tube (11) is fixedly connected to a retaining ring (28) with a conical inner wall. The retaining ring (28) has a notch, and the triangular end of the moving block (27) is in contact with the surface of the retaining ring (28).
9. A gas collection device for coal seam gas power generation according to claim 8, characterized in that, A cooler (10) is fixedly connected to the inner wall of the box (1). The surface of the cooler (10) wraps the filter pipe (11). A water collection box (6) is slidably connected inside the box (1). A drain pipe (12) connected to the inside of the cooler (10) is fixedly connected to the surface of the cooler (10). The end of the drain pipe (12) away from the cooler (10) is located above the water collection box (6). A collection box (5) is also connected inside the box (1). The collection box (5) is located directly below the two through slots (25). Activated carbon boxes (4) are slidably connected inside the box (1) and are arranged at equal intervals. The activated carbon boxes (4) are located below the exhaust pipe (2).