Coal seam gas extraction drill hole gas-liquid-solid filtering type separation device and separation method

Abstract

The invention provides a coal seam gas extraction drill hole gas-liquid-solid filtering type separation device and method. The coal seam gas extraction drill hole gas-liquid-solid filtering type separation device comprises a gas-solid-liquid separation mechanism, and the gas-solid-liquid separation mechanism is used for conducting gas-solid-liquid separation on coal seam gas extracted through drill holes; the secondary filtering mechanism is arranged at the top of the supporting base, and the secondary filtering mechanism is used for filtering water vapor and small-particle-size coal dust; the secondary filtering mechanism comprises a secondary filtering cylinder and a condensing assembly, the condensing assembly is used for condensing and collecting water vapor, and an absorbing and drying assembly is connected to the upper portion of the secondary filtering cylinder and used for further absorbing and drying the water vapor. The gas-solid-liquid separation mechanism is used for filtering and separating substances extracted from a coal seam drill hole, gas, solid and liquid are separated and guided out, the secondary filtering mechanism is used for separating water vapor and small-particle-size coal dust mixed in the gas again, the dryness of the gas is improved, a gas extraction system is prevented from being blocked, and the gas extraction efficiency is improved. And subsequent gas extraction work is facilitated.

Description

Technical Field

[0001] The invention relates to the field of gas-liquid-solid separation, and in particular to a gas-liquid-solid filtering separation device and a separation method for a coal seam gas extraction drilling hole. Background Art

[0002] Coalbed gas is a mixture of methane, carbon dioxide and nitrogen that escapes from coal and surrounding rocks. Gas is a harmful factor in coal mine production. It not only pollutes the air, but also causes explosions when it encounters fire when the gas content in the air is 5%-16%, causing accidents. Gas refers to harmful gases mainly composed of coalbed methane in mines, sometimes methane alone. Gas is a colorless, tasteless, odorless gas that can burn or explode. It is difficult to dissolve in water and has a higher diffusion rate than air. Gas is non-toxic, but when the concentration is very high, it can cause suffocation. There are two main states of gas in coal seams: the gas in the permeable space is mainly in a free gas state, called free gas or free gas. The gas in this state obeys the ideal gas state equation; the other is called adsorbed gas, which is mainly adsorbed on the microporous surface of coal and inside the coal particles, occupying the vacancies in the coal molecular structure or the space between coal molecules.

[0003] When coal seam gas is mined, drilling is generally used for extraction. However, the gas extracted by this method contains impurities such as coal powder, sand, and water. Direct extraction may cause blockage of the extraction pipeline or equipment. In the authorized Chinese utility model patent "Announcement No.: CN218235096U, Name: A gas-liquid-solid three-phase separation device for underground gas extraction after coal seam fracturing", the gas, water, sand, and coal powder are mixed into the separation device. After the gas, water, sand, and coal powder are mixed into the separation device, the gas gas moves to the The water, sand and coal powder enter the extraction port, and the coal powder and sand are precipitated in the sand storage space. The water overflows the sand storage baffle inclined at about 35-55 degrees, flows into the water storage space, and is discharged from the drain port. The discharged water volume is measured by the water meter installed at the drain port. However, in the above application, due to the limitation of the volume of the device, the separated gas will inevitably contain more water vapor and coal slag with smaller particle size. The cooled water vapor mixed with coal slag will cause the coal seam gas extraction system to be blocked, affecting the subsequent gas extraction work. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the gas contains impurities such as water vapor, resulting in low gas purity, and to provide a coal seam gas extraction drilling gas-liquid-solid filtration separation device and separation method.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides a coal seam gas extraction drilling gas-liquid-solid filtering separation device and a separation method, comprising a support base,

[0007] A gas-solid-liquid separation mechanism, which is arranged on the top of the support base and is used to separate gas, solid and liquid from coal seam gas extracted by drilling;

[0008] The gas-solid-liquid separation mechanism comprises a gas-solid-liquid separation cylinder, which is installed on the top of the support base, a lower filter screen is connected to the inner side wall of the gas-solid-liquid separation cylinder, a drill pipe is connected to one side of the gas-solid-liquid separation cylinder, and the drill pipe is connected to the gas extraction borehole, an upper filter screen is connected to the inner wall of the gas-solid-liquid separation cylinder, and an auxiliary component is provided at the inner cavity of the gas-solid-liquid separation cylinder, and the auxiliary component is used to separate solids and liquids and clean the lower filter screen and the upper filter screen at the same time;

[0009] A secondary filtering mechanism, the secondary filtering mechanism is arranged on the top of the supporting base, and the secondary filtering mechanism is used to filter water vapor and small-size coal dust;

[0010] The secondary filtration mechanism includes a secondary filter cartridge. The gas-solid-liquid separation cartridge and the secondary filter cartridge are connected via an intermediate pipe. A condensation component is provided inside the secondary filter cartridge, and the condensation component is used to condense and collect water vapor. An absorption and drying component is connected above the secondary filter cartridge, and the absorption and drying component is used to further absorb and dry water vapor and small-particle coal dust and discharge gas.

[0011] In this technical solution, a gas-solid-liquid separation mechanism can be used to filter and separate the materials extracted from the coal seam borehole, so as to separate and extract the gas, solid and liquid. A secondary filtration mechanism can be used to separate the water vapor and small-particle coal dust mixed in the gas again, thereby improving the dryness of the gas, avoiding blockage of the gas extraction system, and facilitating subsequent gas extraction work.

[0012] Preferably, the auxiliary component comprises a power source, the power source is installed on the top of the gas-solid-liquid separation cylinder, and the output end of the power source is connected to a rotating shaft;

[0013] The surface of the rotating shaft is rotatably connected to the top surface of the gas-solid-liquid separation cylinder, and a plurality of centrifugal plates are connected to the surface of the rotating shaft.

[0014] In the present technical solution, auxiliary components are used to facilitate the separation of gas, solid and liquid in the gas-solid-liquid separation cylinder.

[0015] Preferably, a shielding plate is connected to the inner wall of the gas-solid-liquid separation cylinder, and the center line of the horizontal position of the shielding plate is at the same position as the center line of the connection between the gas-solid-liquid separation cylinder and the drill pipe connecting pipe.

[0016] In this technical solution, the baffle can prevent the material entering the gas-solid-liquid separation cylinder from the drill pipe connecting pipe from directly impacting the upper filter screen, preventing it from directly entering the secondary filter cylinder from the upper filter screen and affecting the separation of gas, solid and liquid.

[0017] Preferably, a mounting bar is connected to the bottom end of the rotating shaft, a first cleaning brush is connected to the bottom of the mounting bar, and the first cleaning brush contacts the top surface of the lower filter screen.

[0018] In the technical solution, the lower filter screen can be cleaned by using the rotating first cleaning brush to avoid clogging thereof and affecting the use.

[0019] Preferably, a plurality of connecting columns are connected to the surface of the rotating shaft, and one end of the connecting column away from the rotating shaft is connected to a mounting plate;

[0020] A second cleaning brush is connected to a side of the mounting plate away from the connecting column.

[0021] In the technical solution, the upper filter screen can be cleaned by utilizing the rotating second cleaning brush to avoid clogging thereof and affecting the use.

[0022] Preferably, the condensation assembly comprises an inner pipe and a transmission shaft, the inner pipe is connected to the inner wall of the secondary filter cartridge, the inner sides of the secondary filter cartridge and the condensation assembly are both provided with condensate flow pipes, and a side of the inner pipe away from the middle pipe is provided with a plurality of gas inlet holes;

[0023] The transmission shaft is rotatably connected to the bottom of the inner cavity of the secondary filter cartridge and the bottom of the inner pipe respectively, a rotating plate is connected to the surface of the transmission shaft, and a plurality of follower bars are connected to the side of the rotating plate;

[0024] The top of the follower strip is connected with an intermediate plate, and both sides of the intermediate plate are connected with wiper strips, and the two wiper strips are in contact with the inner wall of the secondary filter cylinder and the outer side surface of the inner pipe respectively.

[0025] In this technical solution, the water vapor can be condensed and collected by using the condensation component.

[0026] Preferably, the condensation assembly further comprises a driving source, which is mounted on the top of the support base and disposed outside the secondary filter cartridge;

[0027] The output end of the driving source is connected to a rotating shaft, and the surface of the rotating shaft is rotatably connected to the side of the secondary filter cartridge;

[0028] One end of the rotating shaft away from the driving source is connected with a transmission part, and the transmission part is connected to the transmission shaft.

[0029] In the present technical solution, the driving source can provide driving force for the rotation of structures such as the wiper strip.

[0030] Preferably, the absorption and drying assembly comprises a fixed shell, the fixed shell is connected to the top of the secondary filter cartridge, and the fixed shell is communicated with the interior of the inner pipe;

[0031] The inner wall of the fixed shell is connected to a water-absorbent and breathable cotton, and the fixed shell is provided with a connection port at a position obliquely above the water-absorbent and breathable cotton;

[0032] The outer side of the fixed shell is connected to a drying pipe, the inner wall of the drying pipe is connected to a plurality of drying plates, and the plurality of drying plates are staggeredly distributed;

[0033] A discharge pipe is connected to a position of the drying plate away from the connection port.

[0034] In the present technical solution, the absorption and drying component can be used to absorb the moisture in the gas and dry the gas, so as to facilitate the subsequent utilization and storage of the gas.

[0035] Preferably, an extrusion assembly is arranged above the water-absorbent and breathable cotton, and the extrusion assembly includes an eccentric wheel, and the eccentric wheel is connected to the output end of the rotating source, and the rotating source is installed outside the fixed shell;

[0036] The bottom side of the rotating source is in contact with the connecting piece, and the bottom of the connecting piece is connected to an extrusion plate;

[0037] A plurality of elastic reset members are connected to the top of the extrusion plate, and the elastic reset members are connected to the inner wall of the fixed shell;

[0038] Two symmetrically distributed guide plates are arranged below the water-absorbent and breathable cotton. The two guide plates are respectively connected to the inner wall of the inner pipe. A guide hole is opened at the position where the inner pipe connects the two guide plates.

[0039] In the technical solution, the water-absorbent and breathable cotton can be squeezed by using an extrusion component, so that the water and small-size coal dust absorbed in the water-absorbent and breathable cotton can be squeezed out and guided into a secondary filter cartridge for collection.

[0040] Preferably, the separation method comprises the following steps:

[0041] Step 1: separation of gas, solid and liquid. The material at the drilling extraction site is sent into the gas-solid-liquid separation cylinder through the drill pipe connecting pipe. At this time, the solid and liquid move to the lower part of the inner cavity of the gas-solid-liquid separation cylinder due to gravity, and the gas is in the upper part of the inner cavity of the gas-solid-liquid separation cylinder. The gas enters the middle pipeline after being filtered by the upper filter screen. The solid and liquid are separated by the lower filter screen to complete the separation of gas, solid and liquid;

[0042] Step 2, secondary filtration, the gas in the middle pipe is mainly water vapor and gas, which is sent into the secondary filter cartridge, where it is condensed under the action of the low temperature of the secondary filter cartridge and the inner pipe, and at the same time, the driving source is used to drive the rotating shaft to rotate, thereby driving the transmission part to rotate, and then driving the transmission shaft to rotate. At this time, the transmission shaft drives the rotating plate and the follower bar to rotate, and then drives the middle plate and the wiper bar to rotate. The wiper bar is used to scrape off the water condensed on the inner wall of the secondary filter cartridge and the outer side of the inner pipe and the attached small-size coal dust and collect them in the lower part of the inner cavity of the secondary filter cartridge, and then the gas enters the inner pipe and enters the fixed outer shell;

[0043] Step three, drying. The gas entering the fixed shell passes through the water-absorbent breathable cotton, which can initially absorb the moist substances in the gas, and then enters the drying pipe. At this time, the drying plate further dries the gas, and the dried gas is discharged through the discharge pipe. At the same time, the rotation source is used to drive the eccentric wheel to rotate, thereby driving the connecting part to move, and then driving the extrusion plate to move, periodically squeezing the water-absorbent breathable cotton to squeeze out the water and small-size coal dust absorbed by the water-absorbent breathable cotton, and guide them through the guide plate to the secondary filter cylinder.

[0044] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0045] The positive and progressive effects of the present invention are:

[0046] The present invention utilizes a gas-solid-liquid separation mechanism to filter and separate substances extracted from coal seam boreholes, thereby realizing the separation and extraction of gas, solid and liquid, and utilizes a secondary filtering mechanism to separate water vapor and small-particle coal dust in the gas, while drying the gas to increase the dryness of the gas, avoid clogging of the gas extraction system, and facilitate subsequent gas extraction work. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural schematic diagram of a coal seam gas extraction drilling gas-liquid-solid filtration separation device and separation method according to an embodiment of the present invention.

[0048] Figure 2 for Figure 1 The schematic diagram of the overall internal structure of the coal seam gas extraction drilling gas-liquid-solid filtration separation device and separation method is shown.

[0049] Figure 3 for Figure 1 The schematic diagram of the internal side view structure of the inner pipe of the coal seam gas extraction drilling gas-liquid-solid filtration separation device and separation method is shown.

[0050] Figure 4 for Figure 1The schematic diagram of the internal structure of the gas-solid-liquid separation cylinder of the coal seam gas extraction drilling gas-liquid-solid filtering separation device and separation method is shown.

[0051] Figure 5 for Figure 1 The exploded structural diagram of the connection relationship between the transmission shaft, rotating plate, follower bar, intermediate plate, wiper bar, driving source, rotating shaft and transmission part of the coal seam gas extraction drilling gas-liquid-solid filtration separation device and separation method is shown.

[0052] Figure 6 for Figure 1 The structural schematic diagram of the connection relationship between the eccentric wheel and the rotating source of the coal seam gas extraction drilling gas-liquid-solid filtering separation device and separation method is shown.

[0053] Figure 7 for Figure 1 The schematic diagram of the top view of the internal structure of the fixed shell of the coal seam gas extraction drilling gas-liquid-solid filtering separation device and separation method is shown.

[0054] Description of Reference Numerals

[0055] 1. Support base;

[0056] 2. Gas-solid-liquid separation cylinder;

[0057] 3. Lower filter;

[0058] 4. Drill pipe connecting pipe;

[0059] 5. Upper filter;

[0060] 6. Auxiliary components; 61. Power source; 62. Rotating shaft; 63. Centrifugal plate; 64. Shielding plate; 65. Mounting bar; 66. First cleaning brush; 67. Connecting column; 68. Mounting plate; 69. Second cleaning brush;

[0061] 7. Intermediate pipeline;

[0062] 8. Secondary filter cartridge;

[0063] 9. Condensation assembly; 91. Inner pipe; 92. Transmission shaft; 93. Rotating plate; 94. Follower strip; 95. Intermediate plate; 96. Wiper strip; 97. Driving source; 98. Rotating shaft; 99. Transmission unit;

[0064] 10. Absorption and drying assembly; 101. Fixed shell; 102. Water-absorbent and breathable cotton; 103. Drying pipe; 104. Drying plate; 105. Discharge pipe;

[0065] 11. Extrusion assembly; 111. Eccentric wheel; 112. Rotation source; 113. Connector; 114. Extrusion plate; 115. Elastic reset member; 116. Guide plate;

[0066] 12. Moving wheels. DETAILED DESCRIPTION

[0067] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0068] Figures 1 to 7 The structure diagram of the embodiment of the present invention is a gas-liquid-solid filtering separation device and separation method for coal seam gas extraction drilling hole. The gas-liquid-solid filtering separation device and separation method for coal seam gas extraction drilling hole include a support base 1,

[0069] A gas-solid-liquid separation mechanism, which is arranged on the top of the support base 1 and is used to separate gas, solid and liquid from coal seam gas extracted by drilling;

[0070] The gas-solid-liquid separation mechanism includes a gas-solid-liquid separation cylinder 2, which is installed on the top of the support base 1. The side wall of the inner cavity of the gas-solid-liquid separation cylinder 2 is connected to a lower filter screen 3, and one side of the gas-solid-liquid separation cylinder 2 is connected to a drill pipe connecting pipe 4, and the drill pipe connecting pipe 4 is connected to the drilling and extraction equipment. The inner wall of the gas-solid-liquid separation cylinder 2 is connected to an upper filter screen 5, and an auxiliary component 6 is provided at the inner cavity of the gas-solid-liquid separation cylinder 2. The auxiliary component 6 is used to separate solids and liquids and clean the lower filter screen 3 and the upper filter screen 5 at the same time;

[0071] When in use, the material extracted from the coal seam by the drilling extraction equipment is sent into the gas-solid-liquid separation cylinder 2 through the drill pipe connecting pipe 4. At this time, under the action of gravity, the solid and liquid sink, and the gas floats on the upper part of the inner cavity of the gas-solid-liquid separation cylinder 2. Then, the gas passes through the upper filter screen 5 and enters the intermediate pipeline 7;

[0072] After the solid and liquid sink, the lower filter screen 3 is used to filter the solid, so that the solid is trapped at the upper part of the lower filter screen 3, and the liquid is collected at the lower part of the lower filter screen 3 and discharged.

[0073] A secondary filtering mechanism, the secondary filtering mechanism is arranged on the top of the supporting base 1, and the secondary filtering mechanism is used to filter water vapor and gas;

[0074] The secondary filtering mechanism includes a secondary filtering cartridge 8. The gas-solid-liquid separation cartridge 2 and the secondary filtering cartridge 8 are connected via an intermediate pipe 7. A condensation assembly 9 is provided inside the secondary filtering cartridge 8. The condensation assembly 9 is used to condense and collect water vapor and small-particle coal dust. An absorption and drying assembly 10 is connected above the secondary filtering cartridge 8. The absorption and drying assembly 10 is used to further absorb and dry the water vapor and discharge the gas.

[0075] The mixed gas of water vapor and gas is sent into the secondary filter cartridge 8 from the middle pipe 7, and then the water vapor is condensed by the secondary filter cartridge 8 and the inner pipe 91. The condensed water vapor drips downward under the action of gravity and is collected in the lower part of the inner cavity of the secondary filter cartridge 8.

[0076] The gas then enters the absorption and drying assembly 10 to collect moisture and dry it, and then the gas is discharged through the discharge pipe 105.

[0077] Drain pipes are installed at the lower parts of the sides of the gas-solid-liquid separation cylinder 2 and the secondary filter cylinder 8 .

[0078] In this technical solution, a gas-solid-liquid separation mechanism can be used to filter and separate the materials extracted from the coal seam borehole, so as to separate and export the gas, solid and liquid. A secondary filtration mechanism can be used to separate the water vapor and small-particle coal dust mixed in the gas. At the same time, the gas is dried to improve the dryness of the gas, avoid blockage of the gas extraction system, and facilitate subsequent gas extraction work.

[0079] The auxiliary component 6 includes a power source 61, which is installed on the top of the gas-solid-liquid separation cylinder 2, and the output end of the power source 61 is connected to a rotating shaft 62;

[0080] The surface of the rotating shaft 62 is rotatably connected to the top surface of the gas-solid-liquid separation cylinder 2 , and a plurality of centrifugal plates 63 are connected to the surface of the rotating shaft 62 .

[0081] In the present technical solution, the auxiliary component 6 can be used to facilitate the separation of gas, solid and liquid in the gas-solid-liquid separation cylinder 2.

[0082] When gas, solid and liquid are separated in the gas-solid-liquid separation cylinder 2, the power source 61 is used to drive the rotating shaft 62 to rotate, thereby driving the centrifugal plate 63 to rotate. Under the action of the centrifugal force of the centrifugal plate 63, heavier substances can be thrown to the inner wall of the gas-solid-liquid separation cylinder 2, thereby improving the efficiency of gas, solid and liquid separation.

[0083] A shielding plate 64 is connected to the inner wall of the gas-solid-liquid separation cylinder 2 , and the center line of the horizontal position of the shielding plate 64 is at the same position as the center line of the connection between the gas-solid-liquid separation cylinder 2 and the drill pipe connecting tube 4 .

[0084] In this technical solution, the baffle 64 can be used to prevent the material entering the gas-solid-liquid separation cylinder 2 from the drill pipe connecting tube 4 from directly impacting the upper filter screen 5, and prevent it from directly entering the secondary filter cylinder 8 from the upper filter screen 5 and affecting the separation of gas, solid and liquid.

[0085] A mounting bar 65 is connected to the bottom end of the rotating shaft 62 , and a first cleaning brush 66 is connected to the bottom of the mounting bar 65 . The first cleaning brush 66 contacts the top surface of the lower filter screen 3 .

[0086] In the present technical solution, the lower filter screen 3 can be cleaned by using the rotating first cleaning brush 66 to avoid clogging thereof and affecting its use.

[0087] When the rotating shaft 62 rotates, the mounting bar 65 can be driven to rotate, thereby driving the first cleaning brush 66 to rotate. The first cleaning brush 66 is used to clean the lower filter screen 3 to prevent the lower filter screen 3 from being blocked by the trapped solid matter and affecting the use.

[0088] A plurality of connecting posts 67 are connected to the surface of the rotating shaft 62, and a mounting plate 68 is connected to one end of the connecting post 67 away from the rotating shaft 62;

[0089] A second cleaning brush 69 is connected to a side of the mounting plate 68 away from the connecting post 67 .

[0090] In the present technical solution, the upper filter screen 5 can be cleaned by using the rotating second cleaning brush 69 to avoid clogging thereof and affecting its use.

[0091] When the rotating shaft 62 rotates, the connecting column 67 can be driven to rotate, thereby driving the mounting plate 68 to rotate, and then driving the second cleaning brush 69 to rotate. The second cleaning brush 69 is used to clean the upper filter 5 to prevent the upper filter 5 from being blocked by trapped substances and affecting its use.

[0092] The condensation assembly 9 includes an inner pipe 91 and a transmission shaft 92. The inner pipe 91 is connected to the inner wall of the secondary filter cartridge 8. Condensate flow pipes are provided inside the secondary filter cartridge 8 and the condensation assembly 9. A plurality of gas inlet holes are provided on a side of the inner pipe 91 away from the intermediate pipe 7.

[0093] The transmission shaft 92 is rotatably connected to the bottom of the inner cavity of the secondary filter cartridge 8 and the bottom of the inner pipe 91 respectively. A rotating plate 93 is connected to the surface of the transmission shaft 92. A plurality of follower bars 94 are connected to the side of the rotating plate 93.

[0094] The top of the follower strip 94 is connected to an intermediate plate 95 , and both sides of the intermediate plate 95 are connected to wiper strips 96 . The two wiper strips 96 are in contact with the inner wall of the secondary filter cartridge 8 and the outer side surface of the inner pipe 91 , respectively.

[0095] In this technical solution, the condensation component 9 can be used to condense and collect water vapor.

[0096] The condensation assembly 9 further includes a driving source 97, which is installed on the top of the support base 1 and disposed outside the secondary filter cartridge 8;

[0097] The output end of the driving source 97 is connected to a rotating shaft 98, and the surface of the rotating shaft 98 is rotatably connected to the side of the secondary filter cartridge 8;

[0098] One end of the rotating shaft 98 away from the driving source 97 is connected to a transmission part 99 , and the transmission part 99 is connected to the transmission shaft 92 .

[0099] The transmission part 99 includes two bevel gears meshing with each other, wherein one bevel gear is connected to the surface of the transmission shaft 92 , and the other bevel gear is connected to one end of the rotating shaft 98 .

[0100] In the present technical solution, the driving source 97 can provide driving force for the rotation of the wiper strip 96 and other structures.

[0101] When the mixed gas of water vapor and gas enters the secondary filter cartridge 8 , a cooling medium is passed through the secondary filter cartridge 8 and the inner pipe 91 , so that the temperature of the inner wall of the secondary filter cartridge 8 and the outer wall of the inner pipe 91 is relatively low, so that the water vapor can be condensed into liquid, thereby completing the removal of the water vapor, and then the gas enters the inner pipe 91 .

[0102] When water vapor condenses, the driving source 97 is used to drive the rotating shaft 98 to rotate, thereby driving the transmission part 99 to rotate, and then driving the transmission shaft 92 to rotate. At this time, the rotating plate 93 and the follower bar 94 can be driven to rotate, thereby driving the middle plate 95 and the wiper strip 96 to rotate. The wiper strip 96 can scrape out the condensed water droplets on the inner wall of the secondary filter cartridge 8 and the outer side of the inner pipe 91, speeding up the collection of the condensed droplets, so that the secondary filter cartridge 8 and the inner pipe 91 can continue to condense water vapor.

[0103] The absorption and drying assembly 10 includes a fixed shell 101, which is connected to the top of the secondary filter cartridge 8 and communicates with the interior of the inner pipe 91;

[0104] The inner wall of the fixed shell 101 is connected to a water-absorbent and breathable cotton 102, and the fixed shell 101 is provided with a connection port at a position obliquely above the water-absorbent and breathable cotton 102;

[0105] The outer side of the fixed housing 101 is connected to a drying pipe 103, and the inner wall of the drying pipe 103 is connected to a plurality of drying plates 104, and the plurality of drying plates 104 are staggeredly distributed;

[0106] The drying plate 104 is connected to a discharge pipe 105 at a position away from the connection port.

[0107] In the present technical solution, the absorption and drying component 10 can be used to absorb the moisture in the gas and dry the gas, so as to facilitate the subsequent utilization and storage of the gas.

[0108] The gas in the inner pipe 91 enters the fixed outer shell 101, and then passes through the water-absorbent breathable cotton 102. The water-absorbent breathable cotton 102 can absorb the moisture and small-particle coal dust in the gas. Then the gas enters the drying pipe 103, at which time it is dried by the drying plate 104 and finally discharged through the discharge pipe 105.

[0109] An extrusion assembly 11 is disposed above the water-absorbent and breathable cotton 102. The extrusion assembly 11 includes an eccentric wheel 111. The eccentric wheel 111 is connected to the output end of a rotation source 112. The rotation source 112 is installed outside the fixed housing 101.

[0110] The bottom side of the rotation source 112 is in contact with the connecting member 113, and the bottom of the connecting member 113 is connected to an extrusion plate 114;

[0111] A plurality of elastic return members 115 are connected to the top of the extrusion plate 114, and the elastic return members 115 are connected to the inner wall of the fixed housing 101;

[0112] Two symmetrically distributed guide plates 116 are arranged below the water-absorbent and breathable cotton 102 . The two guide plates 116 are respectively connected to the inner wall of the inner pipe 91 . A guide hole is provided at the position where the inner pipe 91 connects the two guide plates 116 .

[0113] In the present technical solution, the water-absorbent breathable cotton 102 can be squeezed by using the squeezing assembly 11, so that the water absorbed in the water-absorbent breathable cotton 102 is squeezed out and guided into the secondary filter cartridge 8 for collection.

[0114] When in use, the rotation source 112 is used to drive the eccentric wheel 111 to rotate. At this time, under the action of the elastic reset member 115, the connecting member 113 can move with the rotation of the eccentric wheel 111, thereby driving the extrusion plate 114 to move in the same direction. The extrusion plate 114 is used to periodically squeeze and release the water-absorbent and breathable cotton 102. When the water-absorbent and breathable cotton 102 is squeezed, the absorbed water and small-particle coal dust can be squeezed out and diverted to the secondary filter cartridge 8 through the guide plate 116 for collection.

[0115] The separation method comprises the following steps:

[0116] Step 1, separation of gas, solid and liquid. The material at the drilling extraction site is sent into the gas-solid-liquid separation cylinder 2 through the drill pipe connecting pipe 4. At this time, the solid and liquid move to the lower part of the inner cavity of the gas-solid-liquid separation cylinder 2 due to the action of gravity, and the gas is in the upper part of the inner cavity of the gas-solid-liquid separation cylinder 2. The gas enters the intermediate pipe 7 after being filtered by the upper filter 5. The solid and liquid are separated by the lower filter 3 to complete the separation of gas, solid and liquid;

[0117] Step 2, secondary filtration. The gas in the middle pipe 7 is mainly water vapor, gas and mixed small particles of coal dust. The gas is sent into the secondary filter cartridge 8. At this time, it is condensed under the action of the low temperature of the secondary filter cartridge 8 and the inner pipe 91. At the same time, the driving source 97 is used to drive the rotating shaft 98 to rotate, thereby driving the transmission part 99 to rotate, and then driving the transmission shaft 92 to rotate. At this time, the transmission shaft 92 drives the rotating plate 93 and the follower bar 94 to rotate, and then drives the middle plate 95 and the wiper bar 96 to rotate. The wiper bar 96 is used to scrape off the water condensed on the inner wall of the secondary filter cartridge 8 and the outer side of the inner pipe 91 and the attached small-sized coal dust and collect them in the lower part of the inner cavity of the secondary filter cartridge 8. Then the gas enters the inner pipe 91 and enters the fixed shell 101.

[0118] Step three, drying. The gas entering the fixed shell 101 passes through the water-absorbent breathable cotton 102. The water-absorbent breathable cotton 102 can initially absorb the moist substances and small-particle coal dust in the gas, and then enters the drying pipe 103. At this time, the drying plate 104 further dries the gas. The dried gas is discharged through the discharge pipe 105. At the same time, the rotation source 112 is used to drive the eccentric wheel 111 to rotate, thereby driving the connecting piece 113 to move, and then driving the extrusion plate 114 to move, and periodically extruding the water-absorbent breathable cotton 102 to squeeze out the water and small-particle coal dust absorbed by the water-absorbent breathable cotton 102, and guide it through the guide plate 116 to the secondary filter cartridge 8.

[0119] A plurality of moving wheels 12 are installed at the bottom of the support base 1 , and the moving wheels 12 can be used to facilitate the movement of the support base 1 and other structures.

[0120] The power source 61 , the driving source 97 and the rotation source 112 are motors or other devices that can output rotational kinetic energy.

[0121] The elastic return member 115 is a spring or other member with elastic return function.

[0122] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A gas-liquid-solid filtering separation device for coal seam gas extraction drilling, comprising a support base (1), characterized in that: The coal seam gas extraction drilling gas-liquid-solid filtering separation device further comprises: a gas-solid-liquid separation mechanism, the gas-solid-liquid separation mechanism being arranged on the top of the support base (1), the gas-solid-liquid separation mechanism being used to separate the gas, solid and liquid of the coal seam gas extracted from the drilling hole; The gas-solid-liquid separation mechanism comprises a gas-solid-liquid separation cylinder (2), the gas-solid-liquid separation cylinder (2) is installed on the top of the support base (1), the inner cavity side wall of the gas-solid-liquid separation cylinder (2) is connected to a lower filter screen (3), one side of the gas-solid-liquid separation cylinder (2) is connected to a drill pipe connecting pipe (4), the drill pipe connecting pipe (4) is connected to a gas extraction drill pipe, the inner wall of the gas-solid-liquid separation cylinder (2) is connected to an upper filter screen (5), and an auxiliary component (6) is provided at the inner cavity of the gas-solid-liquid separation cylinder (2), the auxiliary component (6) is used to separate solids and liquids, and at the same time clean the lower filter screen (3) and the upper filter screen (5); A secondary filtering mechanism, the secondary filtering mechanism being arranged on the top of the supporting base (1), and the secondary filtering mechanism being used to filter water vapor and small-size coal dust; The secondary filtering mechanism comprises a secondary filtering cartridge (8), the gas-solid-liquid separation cartridge (2) and the secondary filtering cartridge (8) are connected via an intermediate pipe (7), a condensation assembly (9) is arranged inside the secondary filtering cartridge (8), the condensation assembly (9) is used to condense and collect water vapor, an absorption and drying assembly (10) is connected above the secondary filtering cartridge (8), the absorption and drying assembly (10) is used to further absorb and dry water vapor and small-particle coal dust, and discharge gas.

2. The gas-liquid-solid filtering separation device for coal seam gas extraction drilling according to claim 1, characterized in that: The auxiliary component (6) comprises a power source (61), the power source (61) is installed on the top of the gas-solid-liquid separation cylinder (2), and the output end of the power source (61) is connected to a rotating shaft (62); The surface of the rotating shaft (62) is rotatably connected to the top surface of the gas-solid-liquid separation cylinder (2), and a plurality of centrifugal plates (63) are connected to the surface of the rotating shaft (62).

3. The gas-liquid-solid filtering separation device for coal seam gas extraction drilling according to claim 2, characterized in that: The inner wall of the gas-solid-liquid separation cylinder (2) is connected to a shielding plate (64), and the center line of the horizontal position of the shielding plate (64) is at the same position as the center line of the connection between the gas-solid-liquid separation cylinder (2) and the drill rod connecting pipe (4).

4. The gas-liquid-solid filtering separation device for coal seam gas extraction drilling according to claim 2, characterized in that: The bottom end of the rotating shaft (62) is connected to a mounting bar (65), the bottom of the mounting bar (65) is connected to a first cleaning brush (66), and the first cleaning brush (66) is in contact with the top surface of the lower filter screen (3).

5. The gas-liquid-solid filtering separation device for coal seam gas extraction drilling according to claim 2, characterized in that: A plurality of connecting columns (67) are connected to the surface of the rotating shaft (62), and an end of the connecting column (67) away from the rotating shaft (62) is connected to a mounting plate (68); A second cleaning brush (69) is connected to a side of the mounting plate (68) away from the connecting column (67).

6. The gas-liquid-solid filtering separation device for coal seam gas extraction drilling according to claim 1, characterized in that: The condensation assembly (9) comprises an inner pipe (91) and a transmission shaft (92); the inner pipe (91) is connected to the inner wall of the secondary filter cartridge (8); condensate flow pipes are provided inside the secondary filter cartridge (8) and the condensation assembly (9); a plurality of gas inlet holes are provided on a side of the inner pipe (91) away from the intermediate pipe (7); The transmission shaft (92) is rotatably connected to the bottom of the inner cavity of the secondary filter cartridge (8) and the bottom of the inner pipe (91), respectively; a rotating plate (93) is connected to the surface of the transmission shaft (92); and a plurality of follower bars (94) are connected to the side of the rotating plate (93); The top of the follower strip (94) is connected to an intermediate plate (95), and both sides of the intermediate plate (95) are connected to wiper strips (96), and the two wiper strips (96) are in contact with the inner wall of the secondary filter cartridge (8) and the outer side surface of the inner pipe (91) respectively.

7. The gas-liquid-solid filtering separation device for coal seam gas extraction drilling according to claim 6, characterized in that: The condensation assembly (9) further comprises a driving source (97), wherein the driving source (97) is mounted on the top of the support base (1) and is arranged outside the secondary filter cartridge (8); The output end of the driving source (97) is connected to a rotating shaft (98), and the surface of the rotating shaft (98) is rotatably connected to the side of the secondary filter cartridge (8); One end of the rotating shaft (98) away from the driving source (97) is connected to a transmission part (99), and the transmission part (99) is connected to the transmission shaft (92).

8. The gas-liquid-solid filtering separation device for coal seam gas extraction drilling according to claim 1, characterized in that: The absorption and drying assembly (10) comprises a fixed shell (101), the fixed shell (101) is connected to the top of the secondary filter cartridge (8), and the fixed shell (101) is in communication with the interior of the inner pipe (91); The inner wall of the fixed shell (101) is connected to a water-absorbent and breathable cotton (102), and the fixed shell (101) is provided with a connection port at a position obliquely above the water-absorbent and breathable cotton (102); The outside of the fixed shell (101) is connected to a drying pipe (103), the inner wall of the drying pipe (103) is connected to a plurality of drying plates (104), and the plurality of drying plates (104) are staggeredly distributed; A discharge pipe (105) is connected to a position of the drying plate (104) away from the connection port.

9. The gas-liquid-solid filtering separation device for coal seam gas extraction drilling according to claim 8, characterized in that: An extrusion assembly (11) is arranged above the water-absorbent and breathable cotton (102), and the extrusion assembly (11) comprises an eccentric wheel (111), and the eccentric wheel (111) is connected to the output end of a rotating source (112), and the rotating source (112) is installed on the outside of the fixed housing (101); The bottom side of the rotation source (112) is in contact with the connecting member (113), and the bottom of the connecting member (113) is connected to an extrusion plate (114); A plurality of elastic return members (115) are connected to the top of the extrusion plate (114), and the elastic return members (115) are connected to the inner wall of the fixed housing (101); Two symmetrically distributed guide plates (116) are arranged below the water-absorbent and breathable cotton (102); the two guide plates (116) are respectively connected to the inner wall of the inner pipe (91); and guide holes are provided at the position where the inner pipe (91) connects the two guide plates (116).

10. A separation method of the gas-liquid-solid filtering type separation device for coal-bed gas extraction drilling holes according to any one of claims 1 to 9, characterized in that: The separation method comprises the following steps: Step 1, separation of gas, solid and liquid. The material at the drilling extraction site is sent into the gas-solid-liquid separation cylinder (2) through the drill pipe connecting pipe (4). At this time, the solid and liquid move to the lower part of the inner cavity of the gas-solid-liquid separation cylinder (2) due to the action of gravity, and the gas is in the upper part of the inner cavity of the gas-solid-liquid separation cylinder (2). The gas and small particles of coal dust are filtered by the upper filter (5) and enter the middle pipe (7). The solid and liquid are separated under the action of the lower filter (3), completing the separation of gas, solid and liquid; Step 2, secondary filtration, the gas in the middle pipe (7) is mainly water vapor and gas, and the gas is sent into the secondary filter cartridge (8), where it is condensed under the action of the low temperature of the secondary filter cartridge (8) and the inner pipe (91), and at the same time, the driving source (97) is used to drive the rotating shaft (98) to rotate, thereby driving the transmission part (99) to rotate, and then driving the transmission shaft (92) to rotate. At this time, the transmission shaft (92) drives the rotating plate (93) and the follower bar (94) to rotate, thereby driving the middle plate (95) and the wiper bar (96) to rotate, and the wiper bar (96) is used to scrape the water condensed on the inner wall of the secondary filter cartridge (8) and the outer side of the inner pipe (91) and collect it in the lower part of the inner cavity of the secondary filter cartridge (8), and then the gas enters the inner pipe (91) and enters the fixed shell (101); Step 3, dust removal and drying. The gas entering the fixed housing (101) passes through the water-absorbent breathable cotton (102). The water-absorbent breathable cotton (102) can initially absorb the moist substances and small particles of coal dust in the gas, and then enters the drying pipe (103). At this time, the drying plate (104) further dries and removes dust from the gas. The dried gas is discharged through the discharge pipe (105). At the same time, the rotation source (112) is used to drive the eccentric wheel (111) to rotate, thereby driving the connecting piece (113) to move, and then driving the extrusion plate (114) to move, and periodically extruding the water-absorbent breathable cotton (102), squeezing out the water and coal dust absorbed by the water-absorbent breathable cotton (102), and guiding them through the guide plate (116) to the secondary filter cartridge (8).

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