A coal bed gas efficient extraction device for large interval thin coal seam group

Abstract

This invention discloses a high-efficiency coalbed methane extraction device for a group of thin coal seams with large spacing, comprising a main pipe, branch pipes, a pulverized coal filter assembly, and a coal discharge mechanism. The branch pipes are fixedly installed on the main pipe, and the pulverized coal filter assembly is disposed within the main pipe. Coal storage chambers are fixedly disposed on both sides of the pulverized coal filter assembly, and a coal discharge mechanism is fixedly disposed at the bottom of each coal storage chamber. The pulverized coal filter assembly includes a shell, support seats, collection plates, and a conveyor belt. The shell is fixedly disposed within the main pipe, and multiple support seats are staggered and inclined on the shell. A conveyor belt is disposed on each support seat and driven by a motor. Multiple collection plates are disposed on the conveyor belt, and the support seats extend through the shell and into the coal storage chamber.

Description

Technical Field

[0001] This invention relates to the field of efficient coalbed methane extraction technology, specifically to an efficient coalbed methane extraction device for large-spaced thin coal seam groups. Background Technology

[0002] Thin coal seams are those with a thickness of less than 1.3m when mined underground and less than 3.5m when mined in open pits. Compared to conventional coal seams, they are entirely composed of water, and the coalbed methane exists primarily as adsorbed gas.

[0003] Currently, when mining coalbed methane in thin coal seams, it is necessary to first drain water and depressurize the coalbed methane into free gas before collection. However, the coal and rock in thin coal seams are relatively soft, and coal dust is easily generated during the mining process. Coal dust can easily cause pump jamming, and after pump jamming, coal dust needs to be cleaned, making the collection process intermittent and greatly increasing the collection time.

[0004] Therefore, it is necessary to provide a high-efficiency coalbed methane extraction device for large-spacing thin coal seam groups to solve the problems mentioned in the background art. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency coalbed methane extraction device for a group of thin coal seams with large spacing, comprising a main pipe, branch pipes, a coal powder filter assembly, and a coal discharge mechanism, wherein the branch pipes are fixedly installed on the main pipe, the main pipe is provided with a coal powder filter assembly, coal storage chambers are fixedly provided on both sides of the coal powder filter assembly, and a coal discharge mechanism is fixedly provided at the bottom of the coal storage chambers.

[0006] The pulverized coal filter assembly includes a shell, a support base, a collection plate, and a conveyor belt. The shell is fixedly installed in the main pipe. Multiple support bases are staggered and inclined on the shell. A conveyor belt is installed on the support base. The conveyor belt is driven by a motor. Multiple collection plates are installed on the conveyor belt.

[0007] Furthermore, the support base passes through the outer shell and extends into the coal storage chamber.

[0008] Furthermore, as a preferred embodiment, multiple deflection seats are symmetrically arranged on both sides of the conveyor belt, and the right-angle end of the collecting plate is rotatably arranged between two symmetrical deflection seats. A baffle is provided on the conveyor belt, and a spring is fixedly arranged between the collecting plate and the baffle. A stop block is fixedly arranged on the conveyor belt, and the collecting plate is pressed against the stop block by the action of the spring.

[0009] Furthermore, as a preferred embodiment, the outer shell has a notch for the collecting plate to pass through, and an elastic pad is provided in the notch;

[0010] A stop bar is fixedly provided between the deflection seat and the stop block. The stop bar can squeeze the elastic pad and cause the elastic pad to slide along the surface of the stop bar.

[0011] Furthermore, as a preferred embodiment, the collecting plate is a right-angled plate, with its right-angled surface recessed inward in an arc shape;

[0012] Furthermore, the inner right-angled surface of the collecting plate is provided with multiple grooves for collecting coal powder.

[0013] Furthermore, as a preferred embodiment, a support rod is fixedly installed near the support base in the coal storage chamber, and the support rod can squeeze the collecting plate to cause it to deflect.

[0014] An arc-shaped plate is fixedly installed on the coal storage chamber, and the arc-shaped plate is located above the support base.

[0015] Furthermore, as a preferred embodiment, the coal discharge mechanism includes a base and a turntable, wherein the base is fixedly disposed at the bottom of the coal storage chamber, the base has a discharge chamber, and the turntable is rotatably disposed in the discharge chamber.

[0016] Furthermore, preferably, a slope is provided above the base;

[0017] The discharge chamber is provided with discharge port one and discharge port two above and below it, respectively.

[0018] The turntable has slots of the same size as the discharge port one and discharge port two.

[0019] Compared with the prior art, the present invention provides a high-efficiency coalbed methane extraction device for large-spacing thin coal seam groups, which has the following beneficial effects:

[0020] This invention includes a coal powder filter assembly with staggered support seats inside. Each support seat has a conveyor belt and a collection plate. During coalbed methane extraction, the coalbed methane can pass through the surface of the support seats. The collection plate has grooves that trap coal powder, preventing it from blocking the pump. Furthermore, coal storage chambers are located on both sides of the coal powder filter assembly. The collection plate can transport coal powder to the storage chambers via the conveyor belt, and the coal powder can be discharged to the outside of the main pipe via a coal discharge mechanism, achieving separation of coal powder and coalbed methane and effectively improving coalbed methane extraction efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the coal powder filtration assembly structure in this invention;

[0023] Figure 3 for Figure 2 Enlarged schematic diagram of part A;

[0024] Figure 4 This is a schematic diagram of the coal discharge mechanism in this invention.

[0025] In the diagram: 1. Main pipe; 2. Branch pipe; 3. Coal powder filter assembly; 31. Outer shell; 311. Notch; 312. Elastic pad; 32. Support base; 33. Collection plate; 331. Groove; 34. Conveyor belt; 341. Deflector seat; 35. Baffle; 36. Spring; 37. Stop block; 38. Stop bar; 4. Coal discharge mechanism; 41. Base; 42. Turntable; 421. Groove opening; 43. Discharge chamber; 431. Discharge port one; 432. Discharge port two; 5. Coal storage chamber; 51. Support rod; 52. Arc plate. Detailed Implementation

[0026] Example: Please refer to Figures 1-4 In this embodiment of the invention, a high-efficiency coalbed methane extraction device for a group of thin coal seams with large spacing includes a main pipe 1, a branch pipe 2, a coal powder filter assembly 3, and a coal discharge mechanism 4. The branch pipe 2 is fixedly installed on the main pipe 1. The main pipe 1 is provided with a coal powder filter assembly 3. Coal storage chambers 5 are fixedly provided on both sides of the coal powder filter assembly 3. The coal discharge mechanism 4 is fixedly provided at the bottom of the coal storage chambers 5.

[0027] The coal powder filter assembly 3 includes a housing 31, a support base 32, a collection plate 33, and a conveyor belt 34. The housing 31 is fixedly installed in the main pipe 1. Multiple support bases 32 are staggered and inclined on the housing 31. The conveyor belt 34 is installed on the support base 32. The conveyor belt 34 is driven by a motor. Multiple collection plates 33 are installed on the conveyor belt 34.

[0028] Furthermore, the support base 32 passes through the outer shell 31 and extends into the coal storage chamber 5.

[0029] During implementation, a vertical well and multiple horizontal wells are drilled using a drilling rig. The coal seam in the horizontal wells is drained and depressurized. Then, multiple branch pipes 2 are extended into the horizontal wells and connected to the main pipe 1. The main pipe is connected to an extraction pump to extract coalbed methane from the coal seam. During the extraction process, the coalbed methane can pass through the surface of the support base 32. Coal powder mixed in the coalbed methane can be stuck in the groove 331 in the collection plate 33. Then, the coal powder on the collection plate 33 is transported to the coal storage chamber 5 by the conveyor belt 34, and the coal discharge mechanism 4 is used to transport the coal powder to the outside of the main pipe 1, thereby achieving the separation of coalbed methane and coal powder, preventing coal powder from blocking the pump, and thus improving the extraction efficiency of coalbed methane.

[0030] In this embodiment, as Figure 3The conveyor belt 34 has multiple deflector seats 341 symmetrically arranged on both sides. The right-angle end of the collecting plate 33 is rotatably arranged between two symmetrical deflector seats 341. The conveyor belt 34 is provided with a baffle 35. A spring 36 is fixedly arranged between the collecting plate 33 and the baffle 35. A stop block 37 is fixedly arranged on the conveyor belt 34. The collecting plate 33 is pressed against the stop block 37 by the action of the spring 36.

[0031] Specifically, a baffle 35 is provided on the conveyor belt 34, which can hold the collecting plate 33 against the stop block 37 by a spring 36, so that the inner side of the right-angled surface of the collecting plate 33 faces downward and the right-angled surface of the collecting plate 33 is set as an inwardly concave arc surface, which can gather the coal powder and make it easy to trap the coal powder in the groove 311. In addition, a support rod 51 is provided in the coal storage chamber 5. When the collecting plate 33 enters the coal storage chamber 5, the collecting plate 33 can be deflected under the action of the support rod 51 and squeeze the spring 36. Subsequently, after the collecting plate 33 leaves the range of the support rod 51, the collecting plate 33 strikes the stop block 37 under the action of the spring 36, thereby generating vibration, causing the coal powder in the groove 311 to fall into the coal storage chamber 5, thereby filtering the coal powder mixed in the coalbed methane.

[0032] In this embodiment, as Figure 2 , 3 The outer shell 31 has a notch 311 for the collection plate to pass through, and an elastic pad 312 is provided in the notch 311;

[0033] A stop bar 38 is fixedly provided between the deflection seat 341 and the stop block 37. The stop bar 38 can squeeze the elastic pad 312 and make the elastic pad 312 slide along the surface of the stop bar 38.

[0034] Specifically, the elastic pad 312 is provided to isolate the outer shell 31 from the coal storage chamber 5, preventing coal dust in the coal storage chamber 5 from re-entering the outer shell 31. Furthermore, a stop bar 38 is provided between the deflection seat 341 and the stop block 37, which can preferentially squeeze the elastic pad 312 to deflect it when the collecting plate 33 passes through the notch 311, preventing the elastic pad 312 from contacting the collecting plate 33, thereby preventing coal dust on the collecting plate 33 from falling into the outer shell 31.

[0035] In this embodiment, as Figure 3 The collecting plate 33 is a right-angled plate, and its right-angled surface is concave inward in an arc shape;

[0036] Furthermore, the inner right-angled surface of the collecting plate 33 is provided with a plurality of grooves 331 for collecting coal powder.

[0037] In this embodiment, as Figure 2 , 3A support rod 51 is fixedly installed in the coal storage chamber 5 near the support base 32. The support rod 51 can squeeze the collecting plate 33 to cause it to deflect.

[0038] An arc-shaped plate 52 is fixedly installed on the coal storage chamber 5, and the arc-shaped plate 52 is located above the support base 32.

[0039] During implementation, when the collecting plate 33 passes through the notch 311 and enters the coal storage chamber 5, the support rod 51 squeezes the collecting plate 33 to deflect it and squeezes the spring 36. Subsequently, after the collecting plate 33 leaves the squeezing range of the support rod 51, the collecting plate 33 strikes the stop block 37 under the action of the spring 36, causing the coal powder stuck in the groove 331 of the collecting plate 33 to fall into the coal storage chamber 5. An arc-shaped plate 52 is provided on the coal storage chamber 5. The arc-shaped plate 52 can protect the collecting plate 33 located below, thereby preventing the coal powder on the collecting plate 33 above from falling back onto the collecting plate 33 below.

[0040] In this embodiment, as Figure 4 The coal discharge mechanism 4 includes a base 41 and a turntable 42. The base 41 is fixedly installed at the bottom of the coal storage chamber 5, and a discharge chamber 43 is opened in the base 41. The turntable 42 is sealed and rotatably installed in the discharge chamber 43.

[0041] In this embodiment, as Figure 4 An inclined surface is provided above the base 41;

[0042] The discharge chamber 43 is provided with discharge port 431 above and discharge port 432 below;

[0043] The turntable 42 has a slot 421 that is the same size as the discharge port 431 and discharge port 432.

[0044] During implementation, when the coal powder on the collecting plate 33 falls to the bottom of the coal storage chamber 5, the coal powder slides down the inclined surface to the discharge port 431. Then, the turntable 42 rotates, causing the slot 421 to rotate to the discharge port 431. The coal powder falls into the slot 421 through the discharge port 431. Then, the turntable 42 rotates, causing the slot 421 to rotate to the discharge port 432, thereby discharging the coal powder into the coal storage chamber 5. During this process, the turntable 42 remains sealed while rotating in the base 41 to prevent the discharged coal powder from being re-inhaled into the main pipe 1.

[0045] In summary, when implementing this invention, it is preferable to use a drilling rig to drill vertical wells and multiple horizontal wells to drain and depressurize the coal seam in the horizontal wells. Then, multiple branch pipes 2 are extended into the horizontal wells and connected to the main pipe 1. The main pipe is externally connected to a pump to extract coalbed methane from the coal seam. During the extraction process, the coal powder filter assembly 3 is used to filter the coal powder in the coalbed methane and transport the coal powder to the coal storage chamber 5. Then, the coal discharge mechanism 4 is used to discharge the coal powder to the outside of the coal storage chamber 5, effectively preventing the coal powder from getting stuck in the pump, thereby improving the extraction efficiency of coalbed methane.

[0046] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency coalbed methane extraction device for large-spacing thin coal seam groups, characterized in that: It includes a main pipe (1), a branch pipe (2), a coal powder filter assembly (3), and a coal discharge mechanism (4). The branch pipe (2) is fixedly installed on the main pipe (1). The main pipe (1) is provided with a coal powder filter assembly (3). Coal storage chambers (5) are fixedly provided on both sides of the coal powder filter assembly (3). The coal discharge mechanism (4) is fixedly provided at the bottom of the coal storage chambers (5). The coal powder filter assembly (3) includes a shell (31), a support base (32), a collection plate (33), and a conveyor belt (34). The shell (31) is fixedly installed in the main pipe (1). Multiple support bases (32) are staggered and inclined on the shell (31). The conveyor belt (34) is installed on the support base (32). The conveyor belt (34) is driven by a motor. Multiple collection plates (33) are installed on the conveyor belt (34). Furthermore, the support base (32) passes through the outer shell (31) and extends into the coal storage chamber (5); Multiple deflector seats (341) are symmetrically arranged on both sides of the conveyor belt (34). The right-angle end of the collecting plate (33) is rotatably arranged between the two symmetrical deflector seats (341). A baffle (35) is provided on the conveyor belt (34). A spring (36) is fixedly arranged between the collecting plate (33) and the baffle (35). A stop block (37) is fixedly arranged on the conveyor belt (34). The collecting plate (33) is pressed against the stop block (37) by the action of the spring (36). The collecting plate (33) is a right-angled plate, with its right-angled surface concave inward in an arc shape; Furthermore, the inner right-angled surface of the collecting plate (33) is provided with a plurality of grooves (331) for collecting coal powder; A support rod (51) is fixedly installed in the coal storage chamber (5) near the support base (32). The support rod (51) can squeeze the collecting plate (33) to cause it to deflect. An arc-shaped plate (52) is fixedly installed on the coal storage chamber (5), and the arc-shaped plate (52) is located above the support base (32).

2. The efficient coalbed methane extraction device for a large-spacing thin coal seam group according to claim 1, characterized in that: The outer shell (31) has a notch (311) for the collection plate to pass through, and an elastic pad (312) is provided in the notch (311); A stop bar (38) is fixedly provided between the deflection seat (341) and the stop block (37). The stop bar (38) can squeeze the elastic pad (312) and make the elastic pad (312) slide along the surface of the stop bar (38).

3. The efficient coalbed methane extraction device for large-spacing thin coal seam groups according to claim 1, characterized in that: The coal discharge mechanism (4) includes a base (41) and a turntable (42). The base (41) is fixedly installed at the bottom of the coal storage chamber (5). A discharge chamber (43) is opened in the base (41). The turntable (42) is sealed and rotated in the discharge chamber (43).

4. The efficient coalbed methane extraction device for a large-spacing thin coal seam group according to claim 3, characterized in that: An inclined surface is provided above the base (41); The discharge chamber (43) is provided with discharge port one (431) above and discharge port two (432) below; The turntable (42) has a slot (421) of the same size as the discharge port one (431) and discharge port two (432).

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