Coal mine directional gas extraction drilling hole gas, water and residue separation system

Abstract

The utility model provides a kind of coal mine directional gas extraction borehole gas, water, residue separation system, belong to gas extraction technical field, to solve the problem of poor construction environment, artificial cleaning intensity of coal mine underground gas extraction directional turning hole, the utility model discloses coal mine directional gas extraction borehole gas, water, residue separation system includes primary separator, gas collector, secondary separator, residue slurry tank and coal slime vibrating screen, realizes the integration of residue discharge, drainage and gas extraction in directional drilling construction and assembly line operation, improves drilling environment, guarantees safety production, and reduces comprehensive cost.

Description

Technical Field

[0001] This utility model belongs to the field of gas extraction technology, specifically relating to a gas, water, and slag separation system for directional gas extraction boreholes in coal mines. Background Technology

[0002] Gas disasters have always been one of the most severe challenges threatening safe production in coal mines, especially in coal and gas outburst mines and high-gas mines, where gas is the core factor restricting safe and stable underground production. To fundamentally prevent and curb gas accidents, efficient control of coal seam gas is essential before coal mining. Currently, underground gas drainage is widely recognized as the most effective gas control method, but its implementation requires the pre-construction of numerous drainage boreholes. At present, underground gas drainage borehole construction techniques in coal mines are mainly divided into two categories: conventional drilling and directional drilling. Compared to conventional drilling, directional drilling has significant advantages such as controllable borehole trajectory, greater borehole depth, and wider borehole coverage, resulting in superior construction speed, gas drainage efficiency, and final drainage effect. It has become a key advanced technology promoted in the field of gas control. However, directional drilling technology typically uses a bottom-hole motor to drive the drill bit to break the coal seam, with high-pressure water as the power source. During drilling, the large amount of coal slag generated by the drill bit breaking the coal seam, the high-pressure water used for propulsion, and the high concentration of methane released from the desorption of the coal seam mix to form a gas-water-slag multiphase flow medium, which is discharged from the borehole opening. This not only severely deteriorates the working environment at the drilling site, but also, due to the high concentration and pressure of methane in the discharged mixture, it can easily cause methane levels to exceed limits at the drilling site, and even trigger dynamic phenomena such as blowouts, seriously threatening construction safety. Furthermore, the coal slag in the mixture settles at the borehole opening and accumulates on site, requiring significant manpower for secondary cleaning and transportation. This not only increases the labor intensity of workers but also significantly raises production costs. Conversely, wastewater containing a large amount of fine coal slag is directly discharged into the roadway drainage ditch. The continuous settling of coal slag easily causes blockages in the ditch, leading to water accumulation in the roadway. This not only affects normal operations but also requires additional investment in water pumps or manual dredging and cleaning, resulting in secondary consumption of manpower and resources. Utility Model Content

[0003] Therefore, the technical problem to be solved by this utility model is to provide a gas, water and slag separation system for directional gas extraction boreholes in coal mines, which can improve the drilling environment, ensure safe production and reduce overall costs.

[0004] To address the aforementioned problems, this utility model provides a gas, water, and slag separation system for directional gas extraction boreholes in coal mines, comprising: a primary separator, a gas collection box, a secondary separator, a slurry pool, and a coal slime vibrating screen. The input end of the primary separator is connected to the borehole. The gas outlet of the primary separator is connected to the gas collection box. The solid-liquid outlet of the primary separator is connected to the input end of the secondary separator. The gas outlet of the secondary separator is connected to the gas collection box. The solid-liquid outlet of the secondary separator is connected to the slurry pool. The gas outlet of the gas collection box is connected to the main gas extraction pipe. The drain outlet of the gas collection box corresponds to a drainage ditch. The coal slime vibrating screen is used to screen the slurry in the slurry pool. The slag outlet of the coal slime vibrating screen corresponds to the conveying equipment. The drain outlet of the coal slime vibrating screen corresponds to the drainage ditch.

[0005] The gas, water, and slag separation system for directional gas extraction boreholes in coal mines also includes an automatic water drainer. The drain outlet of the gas collection box is connected to the inlet of the automatic water drainer. The drain outlet of the automatic water drainer corresponds to the drainage ditch.

[0006] The coal mine directional gas extraction borehole gas, water, and slag separation system also includes a slurry pump and a slurry pipe. The inlet of the slurry pump extends into the slurry pool, and the outlet of the slurry pump is connected to the feed inlet of the coal slime vibrating screen through the slurry pipe.

[0007] The bottom of the slurry tank and the bottom of the coal slime vibrating screen are each equipped with a drain hole. Filter screens are installed on the drain holes.

[0008] The transport equipment includes a belt conveyor, a belt, and a drive unit. The belt is mounted on the belt conveyor. The drive unit is used to move the belt along the belt conveyor.

[0009] Control valves are installed between the primary separator and the gas collection box, between the primary separator and the secondary separator, and between the secondary separator and the gas collection box.

[0010] The connecting pipes between the primary separator, the gas collection box, the secondary separator, and the slurry tank are made of engineering plastic or steel.

[0011] Among them, a ball valve is installed between the input end of the primary separator and the borehole.

[0012] The primary separator is either a cyclone separator or an inertial collision separator.

[0013] The secondary separator is either a gravity settling separator or a baffle plate separator.

[0014] Beneficial effects: The gas, water, and slag separation system for directional gas extraction boreholes in coal mines provided by this utility model integrates slag removal, drainage, and gas extraction into a streamlined operation during directional drilling. This frees workers from the heavy and dangerous manual slag removal work, achieving human-machine separation and significantly improving the level of automation. Furthermore, this utility model effectively reduces the amount of gas emitted from the borehole opening through a two-stage gas separation and extraction process, fundamentally preventing gas exceedance accidents and providing reliable protection for underground safe production. Simultaneously, during directional drilling operations, this utility model significantly improves the working environment, reduces roadway cleaning costs, and enables the recovery of gas as a clean energy source for resource utilization. This contributes to improved overall efficiency and reduced overall costs. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a coal mine directional gas extraction borehole gas, water, and slag separation system according to an embodiment of this utility model.

[0016] The reference numerals in the attached figures are as follows: 1. Primary separator; 2. Gas collection box; 3. Secondary separator; 4. Slurry tank; 5. Coal slime vibrating screen; 6. Automatic water discharge device; 7. Slurry pump; 8. Slurry pipe; 9. Drain hole; 10. Belt conveyor; 11. Belt; 12. DN100 gas conveying pipeline; 13. DN300 gas conveying pipeline; 14. Gas extraction main pipe; 15. DN100 gas, water, and slag conveying pipeline; 16. Water and slag conveying pipeline; 17. Orifice ball valve; 18. Drill hole; 19. Coal wall; 20. Drilling rig. Detailed Implementation

[0017] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of a coal mine directional gas extraction borehole gas, water, and slag separation system provided in this embodiment.

[0021] like Figure 1 As shown, the coal mine directional gas extraction borehole gas, water, and slag separation system in this embodiment includes: a primary separator 1, a gas collection box 2, a secondary separator 3, a slurry pool 4, and a coal slime vibrating screen 5. The input end of the primary separator 1 is connected to the borehole 18. The gas discharge port of the primary separator 1 is connected to the gas collection box 2. The solid-liquid discharge port of the primary separator 1 is connected to the input end of the secondary separator 3. The gas discharge port of the secondary separator 3 is connected to the gas collection box 2. The solid-liquid discharge port of the secondary separator 3 is connected to the slurry pool 4. The gas discharge port of the gas collection box 2 is connected to the gas extraction main pipe 14. The drainage port of the gas collection box 2 corresponds to the drainage ditch. The coal slime vibrating screen 5 is used to screen the slurry in the slurry pool 4. The slag outlet of the coal slime vibrating screen 5 corresponds to the conveying equipment. The drainage port of the coal slime vibrating screen 5 corresponds to the drainage ditch.

[0022] The gas collection box 2 in this embodiment can collect, buffer, and initially purify the methane gas from the primary separator 1 and the secondary separator 3, ensuring that the gas entering the gas extraction main pipe 14 is relatively clean and removing the condensate generated during the collection process. Specifically, when the humid methane gas from the primary separator 1 and the secondary separator 4 enters the gas collection box 2, the gas instantly enters the large-volume gas collection box 2 from the high-pressure, high-speed pipe, and the flow velocity decreases sharply, achieving initial expansion, pressure reduction, and separation. When the gas hits the baffle at the inlet, the larger water droplets and coal dust particles carried in it are directly captured after colliding with the baffle due to their large mass and inertia, and flow down the wall. The gas rises slowly inside the box, and during the flow, fine particles and droplets continue to settle to the bottom of the box under the action of gravity and baffles. The relatively clean methane gas after purification is drawn away from the outlet at the top of the box by the negative pressure generated by the mine extraction system and flows into the gas extraction main pipe 14.

[0023] In this embodiment, the gas collection box 2 can be a baffle-type gas collection box or a cyclone-type gas collection box, etc., and this embodiment does not impose too many restrictions on it. In some embodiments, a demisting screen can also be installed at the gas discharge port of the gas collection box 2 to filter the discharged gas.

[0024] During drilling, a primary separator 1 is used to initially separate the coal slurry, water, and gas discharged from borehole 18. The separated gas containing some moisture is transported to a gas collection box 2, where the accumulated water is discharged into a drainage ditch. The gas in the gas collection box 2 eventually flows into the gas extraction main pipe 14. The coal slag and water containing a small amount of gas separated by the primary separator 1 are transported to a secondary separator 3 for secondary separation. The separated gas is transported back to the gas collection box 2, while the separated coal slag and water are transported to a slurry pool 4. The slurry in the slurry pool 4 is separated into water and slag by a coal slurry vibrating screen 5. The separated coal slurry and slag are discharged to the ground by a transport device, while the separated water is discharged into a drainage ditch. The coal mine directional gas extraction borehole gas, water, and slag separation system of this embodiment realizes the integration and assembly line operation of slag removal, drainage, and gas extraction in directional drilling construction. It can liberate workers from heavy and dangerous manual slag removal work, realize the separation of man and machine, and significantly improve the level of automation. Furthermore, this embodiment effectively reduced the gas emission from 18 boreholes through a two-stage gas separation and extraction process, fundamentally preventing gas exceedance accidents and providing a reliable guarantee for safe underground production. Simultaneously, during directional drilling operations, the coal mine directional gas extraction borehole gas, water, and slag separation system of this embodiment significantly improved the working environment, reduced roadway cleaning costs, and enabled the recovery of gas as a clean energy source for resource utilization. This embodiment is beneficial for improving overall efficiency and reducing overall costs.

[0025] Among them, such as Figure 1 As shown, the gas, water, and slag separation system for directional gas extraction boreholes in coal mines also includes an automatic water drainer 6. The drain outlet of the gas collection box 2 is connected to the inlet of the automatic water drainer 6. The drain outlet of the automatic water drainer 6 corresponds to a drainage ditch.

[0026] The automatic water drainer 6 implemented in this case adopts a float-type mechanical linkage automatic water drainer. From water accumulation and triggering to drainage and reset, the entire process of the float-type mechanical linkage automatic water drainer requires no manual intervention, achieving continuous automatic operation 24 hours a day. This ensures that the gas extraction system can operate continuously and uninterruptedly, avoiding negligence or delays caused by manual periodic water drainage. Furthermore, it requires no external power, is safe and reliable, and is easy to maintain.

[0027] In this embodiment, an automatic water drainer 6 is installed at the drain outlet of the gas collection box 2. When the water level in the gas collection box 2 reaches the preset position, the automatic water drainer 6 can automatically drain water into the drainage ditch, realizing unattended operation, which helps to improve the degree of automation and ensure the continuous and stable operation of the system.

[0028] Among them, such as Figure 1 As shown, the gas, water, and slag separation system for directional gas extraction boreholes in coal mines also includes a slurry pump 7 and a slurry pipe 8. The inlet of the slurry pump 7 extends into the slurry pool 4, and the outlet of the slurry pump 7 is connected to the feed inlet of the coal slime vibrating screen 5 through the slurry pipe 8.

[0029] The slurry pump 7 in this embodiment is a wear-resistant centrifugal slurry pump. The wear-resistant centrifugal slurry pump used in this embodiment can effectively resist the severe wear of coal slag particles, thereby significantly extending its service life and ensuring the stability and continuity of operation under harsh working conditions; its centrifugal structure also provides the advantages of large and stable conveying flow and easy adjustment and control, creating ideal conditions for the efficient and uniform operation of the downstream vibrating screen.

[0030] In this embodiment, the slurry pump 7 is used to send the slurry-water mixture in the slurry tank 4 into the coal slime vibrating screen 5 through the slurry pipe 8. This realizes the automatic, continuous and controllable transfer of materials from the slurry tank 4 to the coal slime vibrating screen 5, thereby completely replacing the inefficient and dangerous manual handling, ensuring the smooth and safe operation of the entire system's assembly line, and helping to reduce labor intensity and improve overall efficiency.

[0031] Among them, such as Figure 1 As shown, drainage holes 9 are provided at the bottom of the slurry tank 4 and the bottom of the coal slime vibrating screen 5, respectively. Filter screens are installed on the drainage holes 9.

[0032] In this embodiment, drainage holes 9 are provided at the bottom of the slurry tank 4 and the bottom of the coal slime vibrating screen 5. These drainage holes allow the supernatant from sedimentation in the slurry tank 4 and the water separated by the coal slime vibrating screen 5 to be discharged into the roadway drainage ditch through the drainage holes 9 equipped with filters, effectively preventing blockages. Furthermore, the drainage holes 9 at the bottom of the slurry tank 4 allow for the early discharge of the supernatant, which helps reduce the screening workload of the coal slime vibrating screen 5.

[0033] Among them, such as Figure 1 As shown, the transport equipment includes a belt frame 10, a belt 11, and a drive unit. The belt 11 is mounted on the belt frame 10. The drive unit is used to drive the belt 11 to move on the belt frame 10.

[0034] This embodiment utilizes belt 11 to transport coal slag separated by coal slime vibrating screen 5. It seamlessly connects with the discharge port of coal slime vibrating screen 5, ensuring the coal slag is immediately transported away upon production. This completely avoids efficiency bottlenecks and on-site accumulation caused by manual loading or intermittent transportation, significantly reducing labor intensity and achieving continuous, efficient, and large-capacity automated transportation. It is reliable in operation, easy to maintain, and can directly connect to the mine's main transportation system, forming a complete transportation chain from the working face to the surface. This is a key link in achieving "no-landing" coal slag, improving the working environment, and enhancing overall production efficiency. However, it should be noted that when installing transportation equipment at the drilling location underground is difficult, a movable coal slime collection box can be installed between the coal slime vibrating screen 5 and the transportation equipment. This movable coal slime collection box collects the filtered coal slime and transports it to the transportation equipment, which then discharges it to the surface.

[0035] Among them, such as Figure 1As shown, control valves are respectively provided between the primary separator 1 and the gas collection box 2, between the primary separator 1 and the secondary separator 3, and between the secondary separator 3 and the gas collection box 2.

[0036] The control valves used in this embodiment can be ball valves, gate valves, or butterfly valves, as long as they meet the usage requirements. This embodiment does not impose too many restrictions on them.

[0037] In this embodiment, control valves are installed between the primary separator 1 and the gas collecting box 2, between the primary separator 1 and the secondary separator 3, and between the secondary separator 3 and the gas collecting box 2. This allows for segmented isolation and maintenance, improving system maintainability. Furthermore, by adjusting the opening degree of each control valve, process parameters can be precisely adjusted to ensure optimal operation and improve system safety.

[0038] Among them, such as Figure 1 As shown, the connecting pipes between the primary separator 1, the gas collection box 2, the secondary separator 3, and the slurry tank 4 are engineering plastic pipes or steel pipes.

[0039] like Figure 1 As shown, in this embodiment, the connecting pipelines between the primary separator 1 and the gas collection box 2, and between the secondary separator 3 and the gas collection box 2, are DN100 gas conveying pipelines 12. The connecting pipeline between the primary separator 1 and the secondary separator 3 is a DN100 gas, water, and slag conveying pipeline 15. The gas collection box 2 is connected to the gas extraction main pipe 14 via a DN300 gas conveying pipeline 13. The connecting pipeline between the secondary separator 3 and the slurry tank 4 is a water and slag conveying pipeline 16.

[0040] In this embodiment, engineering plastic pipes can be ultra-high molecular weight polyethylene pipes, nylon pipes, or reinforced plastic pipes, while steel pipes are generally seamless steel pipes. Steel pipes have high strength, wear resistance, and excellent flame-retardant and antistatic properties, providing a safe guarantee for gas transportation; while engineering plastic pipes have corrosion resistance, are lightweight and portable, and have a smooth, low-resistance inner wall, offering advantages such as long service life and low energy consumption. This embodiment uses either engineering plastic pipes or steel pipes, allowing for flexible material selection based on the specific working conditions of each pipe section, ensuring safety and reliability while optimizing overall cost and maintenance efficiency.

[0041] Among them, such as Figure 1 As shown, a ball valve 17 is provided between the input end of the primary separator 1 and the borehole 18.

[0042] The orifice ball valve 17 in this embodiment includes a 4-point ball valve and a 50mm diameter ball valve, which can be used to connect multiple pipe fittings.

[0043] This implementation includes an orifice ball valve 17 between the input end of the primary separator 1 and the borehole 10. By closing this orifice ball valve 17, the primary separator 1 and its downstream systems can be safely isolated from the borehole operation point. This facilitates the inspection and maintenance of the equipment or its connecting pipelines of the gas, water, and slag separation system in the directional gas extraction borehole of the coal mine, without affecting the drilling equipment itself, thus improving the flexibility of system scheduling. In addition, it can instantly cut off the connection between the borehole 18 and the downstream system in the event of abnormal operating conditions such as blowouts, effectively preventing the reverse leakage of high-pressure gas and coal-water mixtures, thereby ensuring the safety of personnel and equipment.

[0044] Among them, such as Figure 1 As shown, the primary separator 1 is a cyclone separator or an inertial collision separator.

[0045] In this embodiment, the primary separator 1 employs a cyclone separator or an inertial impactor separator, which can efficiently handle the high-speed, high-concentration gas-solid-liquid mixture discharged from the borehole. Utilizing the inertial differences of the media, it achieves initial rapid separation of gas in a very short time, effectively relieving fluid pressure and preventing blowouts. Simultaneously, its simple, robust, and wear-resistant internal structure creates stable conditions for subsequent secondary fine separation, ensuring system processing efficiency and operational safety from the source.

[0046] Among them, such as Figure 1 As shown, the secondary separator 3 is a gravity settling separator or a baffle plate separator.

[0047] In this embodiment, the secondary separator 3 adopts a gravity settling type or baffle plate type separator tank, which can provide a buffer space for expansion and deceleration of the coal slurry water after the initial separation by the primary separator 1. Through gravity settling and baffle effect, the residual fine gas bubbles are separated efficiently and thoroughly, greatly improving the gas recovery rate. Moreover, the gravity settling type separator tank and the baffle plate type separator tank have simple and reliable structures, require no power, and are easy to maintain. Their robust separation efficiency ensures stable feeding in the subsequent water slag treatment stage and ultimately ensures an extremely low gas emission rate of the system.

[0048] The structure of the gas, water, and slag separation system in a directional gas drainage borehole for coal mines has been described above. The following section describes the working steps of the gas, water, and slag separation system in a directional gas drainage borehole for coal mines: A system and method for separating gas, water, and slag in a directional gas extraction borehole in a coal mine, the specific steps of which are as follows: 1) Drilling construction and primary separation The drilling rig 20 is positioned within the directional drilling pit to perform directional drilling on the coal face 19. The high-pressure, high-concentration methane gas, wastewater, and coal slurry mixture discharged during drilling first enters the primary separator 1 for primary gas-water-slag separation.

[0049] 2) Gas extraction and secondary separation In the primary separator 1, most of the high-concentration methane gas is separated and transported to the gas collection box 2 via the DN100 methane delivery pipe 12. The gas collection box 2 is equipped with an automatic water drainer 6, which can automatically drain the accumulated condensate. The purified methane gas is finally transported to the ground via the DN300 methane delivery pipe 13 into the main methane extraction pipe 14.

[0050] The remaining coal slime and water mixture containing a small amount of gas is fed into the secondary separator 3 through a DN100 gas, water, and slag conveying pipe 15 for secondary gas extraction. The extracted gas is also collected in the gas collection box 2, while the separated coal slime and water are discharged into the slurry tank 4. The supernatant after sedimentation in the slurry tank 4 is discharged into the drainage ditch through the drain hole 9 at the bottom of the slurry tank 4.

[0051] 3) Water-slag separation and material processing The slurry pump 7 pumps the coal slurry-water mixture in the slurry tank 4 through the slurry pipe 8 to the coal slurry vibrating screen 5 for water-slag separation. The coal slurry separated by the coal slurry vibrating screen 5 is transported to the belt conveyor 11 and carried out to the ground by the belt conveyor 11; the separated water is discharged into the drainage ditch through the drain hole 9 below the coal slurry vibrating screen 5, completing the entire separation process.

[0052] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0053] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The above are only preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A gas, water, and slag separation system for directional gas extraction boreholes in coal mines, characterized in that, include: Primary separator, gas collection box, secondary separator, slurry tank and coal slime vibrating screen; The input end of the primary separator is connected to the borehole; the gas discharge port of the primary separator is connected to the gas collection box; the solid-liquid discharge port of the primary separator is connected to the input end of the secondary separator. The gas discharge port of the secondary separator is connected to the gas collection box; the solid-liquid discharge port of the secondary separator is connected to the slurry tank. The gas discharge port of the gas collection box is connected to the gas extraction main pipe; the drain port of the gas collection box corresponds to the drainage ditch. The coal slime vibrating screen is used to screen the slurry in the slurry pool; the slag outlet of the coal slime vibrating screen corresponds to the transportation equipment; the drainage outlet of the coal slime vibrating screen corresponds to the drainage ditch.

2. The coal mine directional gas extraction borehole gas, water, and slag separation system according to claim 1, characterized in that, It also includes an automatic water drainer; the drain outlet of the air collection box is connected to the water inlet of the automatic water drainer; the drain outlet of the automatic water drainer corresponds to the drainage ditch.

3. The coal mine directional gas extraction borehole gas, water, and slag separation system according to claim 1, characterized in that, It also includes a slurry pump and a slurry pipe; the inlet of the slurry pump extends into the slurry pool, and the outlet of the slurry pump is connected to the feed inlet of the coal slime vibrating screen through the slurry pipe.

4. The coal mine directional gas extraction borehole gas, water, and slag separation system according to claim 1, characterized in that, The bottom of the slurry pool and the bottom of the coal slime vibrating screen are respectively provided with drainage holes; the drainage holes are provided with filter screens.

5. The coal mine directional gas extraction borehole gas, water, and slag separation system according to claim 1, characterized in that, The transport equipment includes a belt frame, a belt, and a drive unit; The belt is mounted on the belt frame; the drive device is used to drive the belt to move on the belt frame.

6. The coal mine directional gas extraction borehole gas, water, and slag separation system according to claim 1, characterized in that, Control valves are respectively provided between the primary separator and the gas collection box, between the primary separator and the secondary separator, and between the secondary separator and the gas collection box.

7. The coal mine directional gas extraction borehole gas, water, and slag separation system according to claim 1, characterized in that, The connecting pipes between the primary separator, the gas collection box, the secondary separator, and the slurry tank are engineering plastic pipes or steel pipes.

8. The coal mine directional gas extraction borehole gas, water, and slag separation system according to claim 1, characterized in that, A ball valve is provided between the input end of the primary separator and the borehole.

9. The coal mine directional gas extraction borehole gas, water, and slag separation system according to claim 1, characterized in that, The primary separator is either a cyclone separator or an inertial collision separator.

10. The coal mine directional gas extraction borehole gas, water, and slag separation system according to claim 1, characterized in that, The secondary separator is either a gravity settling separator or a baffle plate separator.

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