Gas collecting device

Abstract

The utility model provides a gas collecting device, which comprises a collecting pipe, a gas collecting pipe and a gas collecting pipe, the first cleaning assembly is provided with a circulating pipe and a stopping piece, the circulating pipe is communicated with the collecting pipe, and the stopping piece is arranged in the circulating pipe and used for stopping coal ash in the gas flow; the second cleaning assembly is provided with a washing tank, the end, away from the collecting pipe, of the circulating pipe extends below the liquid level of water stored in the washing tank, an exhaust port is formed in the top of the washing tank, and gas washed through the washing tank is exhausted through the exhaust port; the circulating filtering assembly is provided with a water pump, a filter screen and a spraying piece, the filter screen is fixedly arranged in the washing box and located above the liquid level of water stored in the washing box, a water inlet of the water pump is communicated with the bottom of the washing box, the spraying piece is arranged above the filter screen, and a water outlet of the water pump is communicated with the spraying head. By means of the technical scheme, the problem that excessive impurities are prone to being deposited on washing liquid of a gas collecting device in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a gas collection device. Background Art

[0002] During the coal production process, methane gas is generated as humic organic matter is decomposed by bacteria. The methane gas is stored in the water-injected fracturing pores and cracks of the coal seam or rock formation. When coal mining is carried out, the methane gas will break through the resistance line as the ground stress changes and instantly eject the crushed coal body, seriously affecting the safe production of coal.

[0003] Existing technology typically involves drilling holes underground to drain gas, which is then expelled through ventilation pipes. Once the risk of gas outbursts has been eliminated, coal tunneling and face mining can resume. The exhausted gas is typically stored and utilized as a byproduct of coal. However, gas directly collected by extraction can entrain coal dust due to the pressure of the gas being ejected. Currently, the gas is typically washed through water to remove the coal dust. However, if the circulation time is too long, a large amount of pulverized coal can accumulate in the water, causing the water to become slurry, affecting the water's adsorption capacity and reducing the efficiency of water washing. Utility Model Content

[0004] The utility model provides a gas collecting device to solve the problem in the prior art that excessive impurities are easily deposited in the washing liquid of the gas collecting device.

[0005] The utility model provides a gas collection device, which includes: a collection pipe for collecting gas; a first cleaning component, which has a circulation pipe and a stopper, the circulation pipe is connected to the collection pipe, and the stopper is arranged in the circulation pipe, and is used to stop fly ash in the gas flow; a second cleaning component, which has a water washing box, and one end of the circulation pipe away from the collection pipe extends into the water washing box below the liquid level of the water storage, and the top of the water washing box is provided with an exhaust port, and the gas washed by the water washing box is discharged through the exhaust port; a circulating filtering component, which has a water pump, a filter and a spray part, the filter screen is fixedly arranged in the water washing box and is located above the liquid level of the water storage in the water washing box, the water inlet of the water pump is connected to the bottom of the water washing box, the spray part is arranged above the filter screen, and the water outlet of the water pump is connected to the spray part.

[0006] Furthermore, the circulating filtration assembly also includes a scraper, which is movably arranged above the filter screen and abuts against the filter screen. A slag discharge port is provided on the side wall of the water washing box, and the scraper is arranged corresponding to the slag discharge port to discharge the coal ash on the filter screen through the slag discharge port.

[0007] Furthermore, a sealing piece is provided at the slag discharge port, which can seal or open the slag discharge port. The circulating filtration assembly also includes a weight sensor and a controller. The weight sensor is provided on the filter screen, and the controller is electrically connected to the weight sensor and the sealing piece respectively. When the weight of the filter screen is greater than the preset weight, the controller controls the sealing piece to open the slag discharge port to discharge the coal ash on the filter screen.

[0008] Furthermore, the circulation pipe includes a connecting section and an extension section that are interconnected, the end of the connecting section away from the extension section is connected to the collection pipe, a stopper is arranged in the connecting section, and the end of the extension section away from the connecting section extends into the water storage of the washing tank, and in the direction from the collection pipe to the washing tank, the extension section extends along an arc, and the convex surface of the arc faces upward.

[0009] Furthermore, along the flow direction of the gas, the flow area of ​​the extension section gradually decreases.

[0010] Furthermore, the stopper includes an impeller, and the rotation axis of the impeller is perpendicular to the flow direction of the gas.

[0011] Furthermore, the first cleaning assembly also includes a collection box, which is communicated with the circulation pipe and is arranged below the stopper to collect the coal ash that is blocked by the stopper and falls.

[0012] Furthermore, the collecting box includes an inclined portion and a collecting portion that are connected to each other. The collecting portion is used to collect coal ash. The inclined portion is arranged above the collecting portion and is used to communicate with the circulation pipe. The inclined portion is inclined in the height direction.

[0013] Furthermore, the gas collection device also includes a compressor and a gas collecting tank. The inlet of the compressor is connected to the exhaust port, and the outlet of the compressor is connected to the gas collecting tank. The gas collecting tank is used to collect compressed gas.

[0014] Furthermore, the gas collection device also includes a shielding cover, one end of the shielding cover is sleeved on the end of the collection pipe away from the circulation pipe, and the other end of the shielding cover is used to cover the side wall of the drilling position.

[0015] With the technical solution of the present invention, after the collection pipe is inserted into the coal seam, gas can enter the first and second cleaning assemblies through the collection pipe. After cleaning by the first and second cleaning assemblies, solid coal ash mixed in the gas can be removed, thereby achieving the effect of cleaning the gas. Specifically, after the gas flows into the flow pipe, the stopper will impact the coal powder carried by the gas, causing the coal powder to lose kinetic energy and be adsorbed on the stopper or directly fall, achieving the initial cleaning of the gas. After the gas passes through the flow pipe and enters the water washing tank, the coal powder in the gas will remain in the water, and the gas that has been washed by water will be discharged through the exhaust port, achieving the secondary cleaning of the gas. During the above-mentioned cleaning process, the water pump can pump the stored water mixed with a large amount of coal powder in the water washing box to the spray part, and the stored water is sprayed to the filter screen through the spray part, and falls back to the water washing box after being filtered by the filter screen, thereby realizing the recycling of water. During the water circulation process, the circulating filter component can continuously remove the coal powder in the water, prevent the water from becoming slurry, ensure that the size of the bubbles in the water will not be too small to reduce the ventilation volume, ensure the water adsorption effect, and improve the efficiency of water washing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 The figure shows a schematic structural diagram of the gas collection device provided by the present invention;

[0018] Figure 2 The utility model shows a schematic structural diagram of the scraper and filter provided by the utility model.

[0019] The above drawings include the following reference numerals:

[0020] 100, housing;

[0021] 10. Collection tube;

[0022] 21. Flow tube; 211. Connecting section; 212. Extension section;

[0023] 22. Stopper; 23. Collection box;

[0024] 31. Water washing box; 32. Water pump; 33. Filter; 34. Spraying element; 35. Scraper; 36. Slag discharge port;

[0025] 41. Compressor; 42. Gas collecting tank;

[0026] 50. Shield. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figure 1 As shown, an embodiment of the present invention provides a gas collection device, which includes a collection pipe 10, a first cleaning component, a second cleaning component, and a circulating filter component. The collection pipe 10 is inserted into a borehole in a coal seam to collect gas ejected from the coal seam. The first cleaning component includes a circulation pipe 21 and a stopper 22. The circulation pipe 21 is connected to the collection pipe 10. The stopper 22 is disposed within the circulation pipe 21 to stop coal ash in the gas flow. The second cleaning component includes a water washing tank 31. A preset volume of water is added to the water washing tank 31. The end of the circulation pipe 21 away from the collection pipe 10 extends below the liquid level of the water in the water washing tank 31. The top of the water washing tank 31 has an exhaust port, and the gas washed by the water washing tank 31 is discharged through the exhaust port. The circulating filtration assembly includes a water pump 32, a filter screen 33 and a spray part 34. The filter screen 33 is fixedly arranged in the water washing box 31 and is located above the liquid level of the water stored in the water washing box 31. The water inlet of the water pump 32 is connected to the bottom of the water washing box 31. The spray part 34 is arranged above the filter screen 33, and the water outlet of the water pump 32 is connected to the spray part 34.

[0029] Gas has a certain pressure in the coal seam. By applying the technical solution of the present invention, when the collection pipe 10 is inserted into the coal seam, the gas can enter the first and second cleaning components through the collection pipe 10. After being cleaned by the first and second cleaning components, the solid coal ash mixed in the gas can be removed, thereby achieving the effect of cleaning the gas. Specifically, after the gas flows into the circulation pipe 21, the stopper 22 will collide with the coal powder carried by the gas. The coal powder will lose kinetic energy and be adsorbed on the stopper 22 or directly fall off, achieving the initial cleaning of the gas. After the gas passes through the circulation pipe 21 and enters the water washing box 31, the coal powder in the gas will remain in the water. The gas that has been washed by water will be discharged through the exhaust port, achieving the secondary cleaning of the gas. During the above-mentioned cleaning process, the water pump 32 can pump the water mixed with a large amount of coal powder in the water washing box 31 to the spray part 34, and the stored water is sprayed to the filter 33 through the spray part 34, and falls back to the water washing box 31 after being filtered by the filter 33, thereby realizing the recycling of water. During the water circulation process, the circulating filter component can continuously remove the coal powder in the water, prevent the water from becoming a slurry, ensure that the size of the bubbles in the water is not too small to reduce the ventilation volume, ensure the water adsorption effect, and improve the efficiency of water washing.

[0030] Specifically, in order to ensure the normal operation of the water pump 32, the water pump 32 may be a slurry pump.

[0031] Spectrum Figure 2 As shown, the circulating filtration assembly further includes a scraper 35, which is movably disposed above the filter screen 33 and abuts against the filter screen 33. A slag discharge port 36 is provided on the side wall of the water washing box 31. The scraper 35 is disposed corresponding to the slag discharge port 36 to discharge the coal ash on the filter screen 33 through the slag discharge port 36. With this arrangement, when too much coal ash collects on the filter screen 33 and affects the filtering effect of the filter screen 33, the scraper 35 can scrape the coal ash off the surface of the filter screen 33 and discharge it through the slag discharge port 36, thereby ensuring the passing efficiency of the filter screen 33.

[0032] Moreover, in the present application, the filter 33 is set above the water surface. When the filter 33 is clogged due to excessive coal ash deposited on it, the air pressure below the filter 33 gradually increases. When it increases to a certain level, the clogged filter holes on the filter 33 will be flushed open. Therefore, when the filter 33 is set above the water surface in the present application, the probability of clogging of the filter 33 can be reduced.

[0033] Specifically in the present application, in order to prevent the gas flow from driving the coal ash on the filter 33 through the exhaust port, the filter 33 is arranged to avoid the exhaust port.

[0034] Specifically, a vertical fixing plate is provided on the inner wall of the water washing box 31 , and the filter screen 33 is connected to the water washing box 31 through the fixing plate to ensure the stability of the installation of the filter screen 33 .

[0035] In some embodiments of the present application, the scraper 35 may be connected to a structure such as a telescopic push rod or a linear motor to drive the scraper 35 to move linearly along the surface of the filter 33 .

[0036] Furthermore, a plugging member is provided at the slag discharge port 36, which can block or open the slag discharge port 36. The circulating filter assembly also includes a weight sensor and a controller. The weight sensor is provided on the filter screen 33, and the controller is electrically connected to the weight sensor and the plugging member, respectively. When the weight of the filter screen 33 exceeds a preset weight, the controller controls the plugging member to open the slag discharge port 36 to discharge the coal ash on the filter screen 33. Through the above arrangement, the weight sensor can detect the weight of the filter screen 33. When too much coal ash is deposited, the overall weight of the filter screen 33 will gradually increase until it exceeds the preset weight. At this time, the controller can control the plugging member to open the slag discharge port 36 to discharge the coal ash from the water washing box 31, ensuring the cleanliness of the filter screen 33.

[0037] Specifically, the controller and the driving member are also electrically connected. When the weight sensor detects that the weight of the filter 33 is greater than the preset weight, the controller controls the driving member to drive the scraper 35 to move to scrape off the coal ash on the surface of the filter 33. That is, the scraper 35 can be controlled to move when needed. When the filter 33 has not yet deposited a lot of coal ash, the scraper 35 does not move to reduce the impact of the scraper 35 on the normal filtering work of the filter 33.

[0038] Furthermore, the circulation pipe 21 includes a connecting section 211 and an extension section 212 that are interconnected. The end of the connecting section 211 away from the extension section 212 is connected to the collection pipe 10. The stopper 22 is arranged in the connecting section 211. The end of the extension section 212 away from the connecting section 211 extends into the water storage of the washing tank 31. In the direction from the collection pipe 10 to the washing tank 31, the extension section 212 extends along an arc, and the convex surface of the arc faces upward. Through the above-mentioned setting, the gas will first pass through the connecting section 211, and part of the coal ash will be removed under the stop of the stopper 22 in the connecting section 211. Part of the coal powder in the gas will be hit by the stopper 22 and its kinetic energy will be reduced. However, it will move a certain distance in the extension section 212 under the influence of the airflow, and it is easy to be deposited in the extension section 212. In this application, the extension section 212 is set to be arc-shaped, and the convex surface of the arc faces upward. The coal ash falling into the extension section 212 will fall to the two ends of the extension section 212 to prevent the deposition of coal ash in the extension section 212.

[0039] In some embodiments of the present application, the flow area of ​​the extension section 212 gradually decreases along the gas flow direction. This configuration ensures that the gas pressure is maintained as it passes through the extension section 212, reduces gas pressure loss, and ensures gas flow efficiency.

[0040] Specifically, the cross-sectional shape of the extension section 212 may be circular.

[0041] In one embodiment of the present application, the stopper 22 comprises an impeller, the rotation axis of which is perpendicular to the gas flow. This arrangement allows the impeller to rotate under the influence of the gas flow without significantly affecting the flow velocity, while also preventing coal ash from entering the gas flow.

[0042] Furthermore, the first cleaning assembly further includes a collection box 23, which is in communication with the flow pipe 21 and is disposed below the stopper 22 for collecting the coal ash that is stopped by the stopper 22 and falls. With the above arrangement, the coal ash stopped by the impeller will fall into the collection box 23 for collection.

[0043] Furthermore, collection box 23 includes an interconnected inclined portion and a collection portion. The collection portion is used to collect coal ash. The inclined portion is located above the collection portion and is connected to the circulation pipe 21. The inclined portion is tilted in the height direction. This arrangement prevents the airflow driven by the rotation of the impeller from blowing the coal dust in collection box 23 up again, thereby ensuring the stopping effect of stopper 22.

[0044] Specifically in the present application, the impeller may also be connected to a generator and a battery, and the battery is used to supply power to the weight sensor, the controller and the drive element.

[0045] In some embodiments of the present application, the gas collection device further includes a compressor 41 and a gas collecting tank 42. The inlet of the compressor 41 is connected to the exhaust port, and the outlet of the compressor 41 is connected to the gas collecting tank 42. The gas collecting tank 42 is used to collect compressed gas. Through the above arrangement, the compressor 41 can compress the gas and collect it through the gas collecting tank 42 for use. Furthermore, the gas flow rate after passing through the first cleaning component and the second cleaning component is low and does not contain coal powder, making compression easier and preventing the coal powder from damaging the compressor 41. Moreover, since the gas after passing through the water washing box 31 contains a large amount of water vapor, the presence of this water vapor makes it very easy for the gas collecting tank 42 to liquefy. The liquefied water will increase the amount of gas incorporated under pressure, thereby allowing the gas collecting tank 42 to store more gas.

[0046] Specifically in this application, the gas collection device also includes a shell 100. The shell 100 is provided with a perforation, and the collection pipe 10 is movably arranged in the perforation. The flow pipe 21 of the first cleaning component is connected to the perforation. After the drill rod drills the hole, the collection pipe 10 can be extended into the perforation of the coal wall to collect gas.

[0047] Specifically, the gas collection device also includes a shield 50. One end of the shield 50 is mounted over the end of the collection pipe 10 away from the flow pipe 21, and the other end of the shield 50 is mounted on the sidewall of the drill hole. This arrangement prevents the gas flow from entraining coal blocks during discharge, thereby affecting production safety, and also reduces gas leakage to the outside environment.

[0048] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0049] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0050] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0051] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0052] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A gas collection device, characterized in that: The gas collection device comprises: A collection pipe (10) for collecting gas; A first cleaning component comprises a circulation pipe (21) and a stopper (22), wherein the circulation pipe (21) is in communication with the collection pipe (10), and the stopper (22) is disposed in the circulation pipe (21) and is used to stop the fly ash in the gas flow; The second cleaning component comprises a water washing box (31), one end of the circulation pipe (21) away from the collection pipe (10) extends into the water washing box (31) below the liquid level of the water storage, and the top of the water washing box (31) is provided with an exhaust port, and the gas washed by the water washing box (31) is discharged through the exhaust port; A circulating filtration component comprises a water pump (32), a filter screen (33) and a spraying element (34); the filter screen (33) is fixedly arranged in the water washing box (31) and is located above the liquid level of the water stored in the water washing box (31); the water inlet of the water pump (32) is communicated with the bottom of the water washing box (31); the spraying element (34) is arranged above the filter screen (33); and the water outlet of the water pump (32) is communicated with the spraying element (34).

2. The gas collection device according to claim 1, characterized in that: The circulating filter assembly further includes a scraper (35), which is movably arranged above the filter screen (33) and abuts against the filter screen (33). A slag discharge port (36) is provided on the side wall of the water washing box (31), and the scraper (35) is arranged corresponding to the slag discharge port (36) to discharge the coal ash on the filter screen (33) through the slag discharge port (36).

3. The gas collection device according to claim 2, characterized in that: A blocking piece is provided at the slag discharge port (36), and the blocking piece can block or open the slag discharge port (36). The circulating filter assembly also includes a weight sensor and a controller. The weight sensor is provided on the filter screen (33). The controller is electrically connected to the weight sensor and the blocking piece respectively. When the weight of the filter screen (33) is greater than a preset weight, the controller controls the blocking piece to open the slag discharge port (36) to discharge the coal ash on the filter screen (33).

4. The gas collection device according to claim 1, characterized in that: The circulation pipe (21) comprises a connecting section (211) and an extension section (212) which are connected to each other. One end of the connecting section (211) away from the extension section (212) is connected to the collection pipe (10). The stopper (22) is arranged in the connecting section (211). One end of the extension section (212) away from the connecting section (211) extends into the water storage of the water washing tank (31). In the direction from the collection pipe (10) to the water washing tank (31), the extension section (212) extends along an arc, and the convex surface of the arc faces upward.

5. The gas collection device according to claim 4, characterized in that: Along the flow direction of the gas, the flow area of ​​the connecting section (211) gradually decreases.

6. The gas collection device according to claim 1, characterized in that: The stopper (22) comprises an impeller, the rotation axis of the impeller being perpendicular to the flow direction of the methane gas.

7. The gas collection device according to claim 1, characterized in that: The first cleaning assembly further comprises a collection box (23), which is in communication with the circulation pipe (21) and is arranged below the stopper (22) for collecting the coal ash that is blocked by the stopper (22) and falls.

8. The gas collection device according to claim 7, characterized in that: The collecting box (23) comprises an inclined portion and a collecting portion which are connected to each other. The collecting portion is used to collect coal ash. The inclined portion is arranged above the collecting portion and is used to communicate with the circulation pipe (21). The inclined portion is arranged inclined in the height direction.

9. The gas collection device according to claim 1, characterized in that: The gas collection device further comprises a compressor (41) and a gas collecting tank (42), wherein the inlet of the compressor (41) is communicated with the exhaust port, and the outlet of the compressor (41) is communicated with the gas collecting tank (42), and the gas collecting tank (42) is used to collect compressed gas.

10. The gas collection device according to claim 1, characterized in that: The gas collection device further comprises a shielding cover (50), one end of which is sleeved on an end of the collection pipe (10) away from the circulation pipe (21), and the other end of which is used to cover the side wall of the drilling position.

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