Coal mine gas heat accumulation catalytic oxidation device

Abstract

The present application belongs to the technical field of coal mine gas low carbon utilization and energy saving and emission reduction, especially to a coal mine gas heat accumulation catalytic oxidation device, comprising a shell unit, a processing unit, a pipeline unit and a control unit, the shell unit comprises a cylinder, a top cover and a bottom cover, the top cover is provided with a low temperature gas inlet and a low temperature gas outlet, and the bottom cover is provided with a high temperature gas outlet and a high temperature gas inlet; the cylinder is fixedly provided with a first fan-shaped through pipe, a second fan-shaped through pipe and a fan-shaped partition plate; the driving mechanism drives the rotary bed body to rotate intermittently; the control unit is electrically connected with the driving mechanism; through the intermittent indexing rotation of the rotary bed body, the fan-shaped holes successively undertake the functions of oxidation, heat accumulation and online maintenance, replacing the traditional reversing mode of frequent switching of valves, avoiding periodic fluctuations in the temperature field, and making the oxidation efficiency more stable; the easily damaged airflow reversing valve is cancelled, thereby effectively reducing the gas leakage hidden danger caused by valve wear and seal failure, and improving the safety.

Description

Technical Field

[0001] This invention belongs to the field of low-carbon utilization and energy conservation and emission reduction technology of coal mine gas, and specifically relates to a coal mine gas regenerative catalytic oxidation device. Background Technology

[0002] Methane, the main component of coal mine gas, is both a high-quality and clean gaseous energy source and the biggest safety hazard in coal mine production. To improve the safety of coal mine production, large-scale ventilation is usually used to discharge coal mine gas (called mine exhaust air). Directly discharging mine exhaust air with low methane content into the atmosphere not only wastes energy but also pollutes the atmospheric environment. At present, regenerative thermal oxidation (RTO) technology is widely used in the field of coal mine gas treatment. This technology preheats the gas through a heat storage body, realizes the oxidative decomposition of methane under high temperature conditions, and stores part of the heat released by oxidation in the heat storage ceramic to maintain the oxidation reaction conditions.

[0003] Existing technologies include various regenerative catalytic oxidation devices, but most of them adopt a periodic airflow reversal operation mode, which uses switching valves to achieve the alternation of air intake and exhaust. This reversal mode causes periodic fluctuations in the temperature field within the regenerator, resulting in uneven bed temperature distribution and unstable oxidation efficiency. At the same time, frequent valve switching not only increases energy consumption but also easily causes valve wear and sealing failure, posing a safety hazard of gas leakage.

[0004] A search revealed that Chinese patent CN121498072A discloses "a gas thermal oxidizing device and method without airflow reversal". Although it proposes a technical solution to change the direction of heat wave movement of the heat storage body by adjusting the flow rate of the two airflows, the multi-channel structure of the bidirectional flow heat storage body is prone to channel blockage and uneven airflow distribution during long-term operation.

[0005] To address the aforementioned problems, this invention proposes a coal mine gas regenerative catalytic oxidation device. Summary of the Invention

[0006] To address the aforementioned problems in the existing technology, this invention provides a coal mine gas regenerative catalytic oxidation device, which aims to solve the problems of channel blockage and uneven airflow distribution that easily occur in existing non-commutation devices during long-term operation.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a coal mine gas regenerative catalytic oxidation device, comprising an outer shell unit, a processing unit, a pipeline unit, and a control unit.

[0008] The outer shell unit includes a cylindrical body, a top cover, and a bottom cover. The top cover is provided with a low-temperature air inlet and a low-temperature air outlet, and the bottom cover is provided with a high-temperature air outlet and a high-temperature air inlet.

[0009] A first sector-shaped through pipe, a second sector-shaped through pipe, and a sector-shaped baffle are fixedly installed inside the cylinder;

[0010] The processing unit includes a rotating bed and a drive mechanism. The rotating bed has several fan-shaped holes around its circumference. Storage bins are arranged in layers inside the fan-shaped holes. The upper layer is filled with honeycomb ceramic heat storage body and the lower layer is filled with catalyst carrier. The bottom surface of the storage bins is evenly distributed with breathable micropores.

[0011] The drive mechanism drives the rotary bed to rotate intermittently in indexing increments, so that the sector-shaped holes sequentially correspond to the first sector-shaped through pipe to form an oxidation section, correspond to the second sector-shaped through pipe to form a heat storage section, and correspond to the sector-shaped partition to form an online maintenance section.

[0012] The control unit is electrically connected to the drive mechanism.

[0013] As a preferred embodiment of the present invention, two first sector-shaped through pipes are provided, and the two first sector-shaped through pipes are symmetrically distributed about the axis of the rotating bed.

[0014] There are two second sector-shaped through pipes, which are symmetrically distributed about the axis of the rotating bed.

[0015] The sector-shaped baffle is disposed between adjacent first sector-shaped pipes and second sector-shaped pipes to completely isolate the sector-shaped holes at corresponding positions to form an online maintenance section.

[0016] As a preferred embodiment of the present invention, the piping unit includes an arc-shaped adapter pipe, an outlet pipe, and an inlet pipe;

[0017] The arc-shaped adapter pipe is fixed to the outer wall of the cylinder. The outlet pipe is connected between one end of the arc-shaped adapter pipe and the high-temperature air outlet. The inlet pipe is connected between the other end of the arc-shaped adapter pipe and the high-temperature air inlet.

[0018] As a preferred embodiment of the present invention, graphite sealing rings are fixed within the rotational fit gap between the outer peripheral surface of the rotating bed and the cylinder, as well as between the axial end faces of the first sector-shaped through pipe, the second sector-shaped through pipe, the sector-shaped partition plate, and the rotating bed.

[0019] As a preferred embodiment of the present invention, the driving mechanism includes a rotating column and a cam divider;

[0020] One end of the rotating column is fixedly connected to the rotating bed, and the other end is drivenly connected to the output end of the cam divider, and the cam divider is fixed to the bottom surface of the bottom cover;

[0021] The control unit is electrically connected to the cam divider.

[0022] As a preferred embodiment of the present invention, temperature sensors are fixed on both the top cover and the bottom cover, and the temperature sensors are respectively set for the first sector-shaped through pipe and the second sector-shaped through pipe.

[0023] The temperature sensor is electrically connected to the control unit.

[0024] As a preferred embodiment of the present invention, it also includes a sealing flap, a flipping screw, and a wing nut;

[0025] The rotating bed has a disassembly port at the position corresponding to the fan-shaped hole, and the storage bin is slidably inserted into the fan-shaped hole through the disassembly port;

[0026] The cylinder has an inspection window on its side wall, the sealing flap is hinged to the outside of the inspection window, the sealing flap is embedded with a transparent observation window, and the inner side wall of the sealing flap is rotatably equipped with a pressure roller.

[0027] The flip screw is hinged to the outer wall of the inspection window via a hinge seat;

[0028] The free end of the sealing flap is fixed with a limiting block, and the limiting block is provided with a positioning groove. The flipping screw is inserted into the positioning groove and locked by a wing nut.

[0029] As a preferred embodiment of the present invention, a blocking plate is detachably connected to the disassembly port, and a positioning groove for accommodating the blocking plate is provided on the rotary bed near the disassembly port.

[0030] The blocking plate has mounting holes, and the rotating bed has corresponding threaded holes.

[0031] As a preferred embodiment of the present invention, an S-shaped channel is provided in the first sector-shaped pipe near the low-temperature air inlet.

[0032] As a preferred embodiment of the present invention, a plurality of sets of baffles are fixed inside the first sector-shaped pipe near the low-temperature air inlet, which are staggered and symmetrically distributed along its axial direction. The baffles divide the inner space of the first sector-shaped pipe into continuous S-shaped channels.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] 1. By rotating the rotating bed intermittently, the sector-shaped holes sequentially undertake the functions of oxidation, heat storage, and online maintenance, replacing the traditional method of frequently switching valves, avoiding periodic fluctuations in the temperature field, and making the oxidation efficiency more stable.

[0035] 2. The easily damaged airflow reversing valve has been eliminated, thereby effectively reducing the risk of gas leakage caused by valve wear and seal failure, and improving safety;

[0036] 3. Each sector-shaped hole has a honeycomb ceramic heat storage body in the upper layer and a catalyst carrier in the lower layer. The waste gas is preheated by heat storage before catalytic oxidation, resulting in a more thorough reaction. At the same time, the heat storage body can recover heat to maintain the reaction temperature and reduce energy consumption.

[0037] 4. An online maintenance section is provided by a sector-shaped partition, which allows for maintenance or packing replacement of the corresponding sector while the equipment is running, without the need to shut down the entire machine, thus ensuring continuous production.

[0038] Other additional advantages and benefits of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0040] Figure 1 This is a schematic diagram of the structure of the present invention;

[0041] Figure 2 This is a schematic diagram of the isometric structure of the processing unit in this invention;

[0042] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0043] Figure 4 This is a schematic diagram of the isometric structure of the rotating bed in this invention;

[0044] Figure 5 This is a schematic diagram of the isometric structure of the drive mechanism in this invention;

[0045] Figure 6 This is a schematic diagram of the airflow direction in this invention;

[0046] Figure 7 For the present invention Figure 3 Enlarged structural diagram at point A in the diagram;

[0047] Figure 8 For the present invention Figure 3 Enlarged structural diagram at point B in the diagram;

[0048] Figure 9 This is a schematic diagram of the isometric structure of the inspection window in this invention;

[0049] Figure 10 For the present invention Figure 9 A magnified structural diagram at point C in the diagram.

[0050] In the diagram: 1. Outer shell unit; 11. Cylinder; 111. Inspection window; 12. Top cover; 121. Low-temperature air inlet; 122. Low-temperature air outlet; 13. Bottom cover; 131. High-temperature air outlet; 132. High-temperature air inlet;

[0051] 2. Processing unit; 21. Rotary bed; 211. Sector-shaped hole; 212. Assembly / disassembly port; 213. Positioning groove; 214. Threaded hole; 22. First sector-shaped through pipe; 221. S-shaped channel; 23. Second sector-shaped through pipe; 24. Sector-shaped partition; 25. Storage bin; 251. Breathable micropores; 26. Honeycomb ceramic heat storage body; 27. Catalyst carrier; 28. Blocking plate; 281. Mounting hole; 29. ​​Drive mechanism; 291. Rotating column; 292. Cam divider;

[0052] 3. Piping unit; 31. Arc-shaped adapter pipe; 32. Outlet pipe; 33. Inlet pipe;

[0053] 4. Control unit; 5. Temperature sensor; 6. Graphite sealing ring; 7. Baffle plate;

[0054] 8. Sealing flap; 81. Transparent observation window; 82. Limiting block; 821. Positioning groove; 83. Pressure roller;

[0055] 9. Flip screw; 91. Hinge seat;

[0056] 10. Wing nut. Detailed Implementation

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] Example 1

[0059] This embodiment provides a coal mine gas regenerative catalytic oxidation device, which includes an outer shell unit 1, a processing unit 2, a pipeline unit 3, and a control unit 4. The whole device has a vertical cylindrical structure and the total height of the whole device is 2.8m-5.2m. The total height of the coal mine gas regenerative catalytic oxidation device in this embodiment is 4.0m. The maximum outer diameter of the outer shell unit 1 is 1.2m-2.6m. In this embodiment, it is 1.9m.

[0060] like Figure 1As shown, the outer shell unit 1 serves as the supporting base of the whole machine. The processing unit 2 is coaxially nested inside the outer shell unit 1. The pipeline unit 3 is fixed to the outer wall of the cylinder 11 of the outer shell unit 1 by bolts. The control unit 4 is independently arranged on the side of the equipment. The control unit 4 is electrically connected to all electrical components of the whole machine by shielded cables to realize automatic monitoring and control of the operating status of the entire device.

[0061] Existing conventional RTO gas treatment equipment relies on reversing valves to periodically switch airflow. Frequent opening and closing of valves can lead to wear and leakage, and the temperature of the regenerator bed fluctuates greatly. The prior art document CN121498072A, "A Gas Regenerator Oxidation Device and Method Without Airflow Reversal," relies on bidirectional airflow regulation for heat storage. Long-term operation can easily lead to channel blockage and airflow deviation. This device eliminates the airflow reversing valve and uses a rotating bed to achieve alternating operation of oxidation, heat storage, and maintenance zones, thus avoiding the defects of existing technologies from the root of the problem.

[0062] like Figure 1 and Figure 3 As shown, the outer casing unit 1 includes three parts: a cylindrical body 11, a top cover 12, and a bottom cover 13. The upper and lower ends of the cylindrical body 11 are connected to the top cover 12 and the bottom cover 13 respectively by flange bolts to ensure the stability and sealing of the connection.

[0063] The top cover 12 is integrally stamped and formed, with a low-temperature air inlet 121 and a low-temperature air outlet 122 on the top surface. The diameter of both air inlets is DN200-DN450, and DN300 is used in this embodiment. The bottom cover 13 is equipped with a high-temperature air outlet 131 and a high-temperature air inlet 132. The specifications of the air inlets are consistent with those of the air inlets on the top cover 12. The low-temperature air inlet 121 is used to introduce coal mine exhaust gas to be treated, the low-temperature air outlet 122 is used to discharge the purified gas after catalytic oxidation treatment, the high-temperature air outlet 131 is used to export the high-temperature purified gas to the pipeline unit 3, and the high-temperature air inlet 132 is used to reintroduce the high-temperature gas after circulation and guidance through the pipeline unit 3 into the device to participate in heat storage.

[0064] The first sector-shaped through pipe 22, the second sector-shaped through pipe 23, and the sector-shaped partition plate 24 are welded and fixed inside the cylinder 11. There are two first sector-shaped through pipes 22, which are symmetrically arranged along the axial center of the rotating bed 21, with a sector wrap angle of 45°-120°, which is 45° in this embodiment. There are also two second sector-shaped through pipes 23, which are arranged symmetrically in the same way as the first sector-shaped through pipes 22, and the sector wrap angle is the same as that of the first sector-shaped through pipes 22.

[0065] The sector-shaped baffle 24 is welded and fixed between the adjacent first sector-shaped pipe 22 and second sector-shaped pipe 23. Its structure is completely the same as that of the first sector-shaped pipe 22 and the second sector-shaped pipe 23. All three are made of heat-resistant stainless steel, such as 310S stainless steel, to withstand the high-temperature conditions during the operation of the device. The sector-shaped baffle 24 completely isolates the upper and lower airflow channels in the corresponding area, forming an independent online maintenance section.

[0066] The processing unit 2 is the core reaction heat exchange structure of the whole machine. It includes a rotating bed 21 and a drive mechanism 29. The rotating bed 21 is coaxially arranged in the middle of the inner cavity of the cylinder 11. The drive mechanism 29 is bolted and fixed to the bottom surface of the bottom cover 13. The output end of the drive mechanism 29 passes through the bottom cover 13 and is connected to the rotating bed 21 through a coupling.

[0067] like Figures 2-4 As shown, the rotating bed 21 is an annular disc structure with a thickness of 120mm-220mm. In this embodiment, the thickness of the rotating bed 21 is 160mm. Eight sets of fan-shaped holes 211 are evenly opened around the circumference of the rotating bed 21. The fan-shaped holes 211 are through holes that penetrate along the axial direction of the rotating bed 21. Their cross-sectional shape is fan-shaped. Adjacent fan-shaped holes 211 are separated by the solid part of the rotating bed 21. The fan-shaped wrap angle of the fan-shaped holes 211 matches the first fan-shaped through pipe 22 (second fan-shaped through pipe 23, fan-shaped partition 24) at 45°. Each fan-shaped hole 211 has two storage bins 25 placed inside, one above the other. The storage bins 25 are drawer-type bin structures with a fan-shaped cross-section. Their shape and size are adapted to the fan-shaped holes 211.

[0068] The upper storage silo 25 is filled with a honeycomb ceramic heat storage body 26, which is a commercially available conventional heat storage ceramic material. It has several axially penetrating honeycomb channels inside to facilitate gas flow and heat accumulation. The lower storage silo 25 is filled with a catalyst carrier 27, which is a honeycomb ceramic carrier loaded with a precious metal catalyst (such as platinum, palladium, etc.) to catalyze the oxidation of methane gas at a suitable temperature.

[0069] In this embodiment, the honeycomb ceramic heat storage body 26 is cordierite or mullite. Cordierite is used in this embodiment. The pore density of the honeycomb ceramic heat storage body 26 is 200 pores / square inch to 400 pores / square inch. 300 pores / square inch is used in this embodiment. The catalyst support 27 is made of the same material as the honeycomb ceramic heat storage body 26. The noble metal catalyst loaded on the catalyst support 27 is a mixture of platinum and palladium. The mass ratio of platinum to palladium is 3:1 to 1:1. 2:1 is used in this embodiment. The total loading of the noble metal catalyst is 0.1wt% to 0.5wt%. 0.3wt% is preferred in this embodiment. The catalyst support 27 is prepared by the conventional impregnation method, which involves impregnating the honeycomb ceramic support in a solution containing platinum and palladium salts, followed by drying and calcination.

[0070] The bottom surface of the storage bin 25 is densely covered with ventilation micropores 251. The diameter of the ventilation micropores 251 is 3mm-8mm. In this embodiment, it is designed to be 5mm. The ventilation micropores 251 are evenly distributed in a matrix to allow gas to pass through the bottom surface of the storage bin 25 so as to achieve uniform airflow distribution.

[0071] like Figure 3 and Figure 5 As shown, the drive mechanism 29 includes a rotating column 291 and a cam divider 292. The rotating column 291 is a cylindrical structure, with one end (upper end) fixedly connected to the center of the lower end face of the rotary bed 21 by bolts, and the other end (lower end) of the rotating column 291 being drivenly connected to the output end of the cam divider 292. The cam divider 292 is fixedly installed on the bottom surface of the bottom cover 13 by flange bolts. The cam divider 292 is a commercially available conventional cam divider, which has a built-in drive motor and cam indexing mechanism, and can realize intermittent indexing rotation output. The control unit 4 is electrically connected to the cam divider 292. The control unit 4 sends a control signal to the cam divider 292, and the cam divider 292 drives the rotary bed 21 to rotate intermittently according to the preset indexing angle and intermittent time.

[0072] Driven by the cam divider 292, the rotating bed 21 rotates by a fixed indexing angle (45° in this embodiment) each time, so that each sector hole 211 corresponds sequentially to the position of the first sector pipe 22, the position of the second sector pipe 23, and the position of the sector partition 24. The dwell time of a single rotation depends on the actual processing situation, usually 20min-60min. When the sector hole 211 corresponds to the first sector pipe 22, the sector hole 211 and the first sector pipe 22 together form an oxidation section. When the sector hole 211 corresponds to the second sector pipe 23, the sector hole 211 and the second sector pipe 23 together form a heat storage section. When the sector hole 211 corresponds to the sector partition 24, the sector partition 24 completely isolates the sector hole 211, forming an online maintenance section. At this time, the operator can maintain or replace the packing in the storage bin 25 in the sector hole 211 without stopping the machine.

[0073] like Figure 1 and Figure 6As shown, the pipeline unit 3 includes an arc-shaped adapter pipe 31, an outlet pipe 32, and an inlet pipe 33. The arc-shaped adapter pipe 31 is an arc-shaped tubular structure that is fixedly installed on the outer wall of the cylinder 11. The outlet pipe 32 is exactly the same as the inlet pipe 33, and is a U-shaped tubular structure. The outlet pipe 32 connects one end of the arc-shaped adapter pipe 31 to the high-temperature gas outlet 131, and the inlet pipe 33 connects the other end of the arc-shaped adapter pipe 31 to the high-temperature gas inlet 132. The arc-shaped adapter pipe 31, the outlet pipe 32, and the inlet pipe 33 are all made of heat-resistant stainless steel, such as 310S stainless steel. The connection between each pipe is a flange bolt connection to ensure the sealing of the high-temperature gas during the transportation process.

[0074] like Figure 3 and Figure 7 As shown, a graphite sealing ring 6 is fixed in the rotational fit gap between the outer circumferential surface of the rotating bed 21 and the inner wall of the cylinder 11; at the same time, graphite sealing rings 6 are fixed between the axial end face of the first sector-shaped pipe 22 and the rotating bed 21, between the axial end face of the second sector-shaped pipe 23 and the rotating bed 21, and between the axial end face of the sector-shaped partition 24 and the rotating bed 21; the graphite sealing ring 6 is a ring structure, and its material is flexible graphite, which has good self-lubricating properties and high temperature resistance; the graphite sealing ring 6 is interference-fitted into the sealing groove opened on the end face of the corresponding component and fixed by compression, with an interference of 0.02mm-0.05mm to ensure the stability of the graphite sealing ring 6 installation; the compression of the graphite sealing ring 6 is 10%-20%, and this embodiment uses a compression of 15% to ensure the airtightness between the components during the rotation of the rotating bed 21 and prevent gas leakage.

[0075] like Figure 3 As shown, temperature sensors 5 are fixed on both the top cover 12 and the bottom cover 13, and the temperature sensors 5 are respectively set for the first sector-shaped pipe 22 and the second sector-shaped pipe 23. The temperature sensors 5 are thermocouple-type temperature sensors, and their measuring ends extend into the airflow area inside the first sector-shaped pipe 22 and the second sector-shaped pipe 23 to detect the gas temperature in each sector-shaped pipe in real time. The signal output end of the temperature sensor 5 is electrically connected to the control unit 4. The control unit 4 determines the working status of the heat storage body and catalyst carrier 27 in each sector-shaped hole 211 according to the temperature signal fed back by the temperature sensor 5, and adjusts the rotation rhythm of the drive mechanism 29 accordingly.

[0076] Control unit 4 adopts an explosion-proof PLC control cabinet, which integrates signal acquisition modules, relays, and operation touch screens. All electrical wiring meets the explosion-proof standards for underground coal mines.

[0077] like Figure 2 and Figure 4As shown, the rotary bed 21 has a disassembly port 212 on the outer side of each fan-shaped hole 211. The size of the disassembly port 212 matches the outer contour of the storage bin 25. The storage bin 25 is slidably connected into the fan-shaped hole 211 through the disassembly port 212. A blocking plate 28 is detachably mounted on the outer side of the disassembly port 212. A positioning groove 213 is opened on the plate surface of the rotary bed 21. The blocking plate 28 is completely embedded in the positioning groove 213 to achieve a flush plate surface. The positioning groove 213 is a recessed stepped groove. The blocking plate 28 is embedded in the positioning groove 213 and fixedly connected by bolts. An installation hole 281 is opened on the blocking plate 28. The installation hole 281 is a through hole structure. A threaded hole 214 is opened on the rotary bed 21. The bolt passes through the installation hole 281 and is screwed into the threaded hole 214 to fix the blocking plate 28 at the disassembly port 212.

[0078] Furthermore, a rectangular inspection window 111 is provided on the side wall of the cylinder 11. The inspection window 111 is equipped with a sealing flap 8, a flip screw 9, and a wing nut 10 to form a sealing inspection assembly.

[0079] like Figure 9 , Figure 10 As shown, the side of the sealing flap 8 is hinged to the outside of the inspection window 111 via stainless steel hinges; a high-temperature resistant quartz transparent observation window 81 is embedded in the middle of the sealing flap 8; a pressure roller 83 is rotatably mounted on the inner wall of the sealing flap 8, and the pressure roller 83 is installed with a pin clearance fit, allowing it to rotate freely. When the sealing flap 8 is closed, the pressure roller 83 presses the processing unit 2 against the end face of the storage bin 25 in the corresponding position, preventing the storage bin 25 from shaking due to the lack of radial restraint when rotating to this position, while not affecting the storage. The rotation of the hopper 25; the flip screw 9 is hinged to the outer wall of the inspection window 111 through the hinge seat 91, and the hinge seat 91 is welded and fixed to the outer wall of the inspection window 111; the free end of the sealing flap 8 is integrally formed with a limiting block 82, and the end of the limiting block 82 is provided with a positioning groove 821. The flip screw 9 can be flipped forward and inserted into the positioning groove 821. The end of the flip screw 9 is screwed with a wing nut 10. Tightening the wing nut 10 can lock the sealing flap 8 and achieve complete sealing of the inspection window 111.

[0080] like Figure 3 and Figure 8As shown, an S-shaped channel 221 is provided in the first sector-shaped pipe 22 near the low-temperature air inlet 121. Specifically, multiple sets of baffles 7 are fixed in the first sector-shaped pipe 22 near the low-temperature air inlet 121, which are staggered and symmetrically distributed along its axial direction. The baffles 7 are rectangular plate structures made of heat-resistant stainless steel. Each baffle 7 is spaced apart along the axial direction of the first sector-shaped pipe 22. Two adjacent sets of baffles 7 are fixed on the inner walls of opposite sides of the first sector-shaped pipe 22, and a gap is left between the free end of the baffle 7 and the inner wall of the opposite side for gas to pass through. Multiple sets of baffles 7 separate the inner space of the first sector-shaped pipe 22 to form a continuous S-shaped channel 221. When the low-temperature gas enters the first sector-shaped pipe 22 from the low-temperature air inlet 121, the gas flows in a meandering manner along the S-shaped channel 221, which increases the flow path length and turbulence of the gas in front of the honeycomb ceramic heat storage body 26, which is conducive to uniform contact and sufficient heat exchange between the gas and the honeycomb ceramic heat storage body 26.

[0081] Combination Figure 6 The airflow diagram shows that the complete operation process is divided into three cyclic stations: oxidation section, heat storage section, and online maintenance section. The station is switched intermittently by the rotating bed 21. The working process of this embodiment is as follows:

[0082] Oxidation Section Station: When a set of fan-shaped holes 211 are aligned with the first fan-shaped pipe 22, an oxidation section is formed; low-temperature, low-concentration coal mine gas enters the first fan-shaped pipe 22 from the low-temperature air inlet 121 of the top cover 12. The airflow passes through the S-shaped channel 221 and is fully turbulently mixed under the action of the baffle 7. It then passes down through the upper honeycomb ceramic heat storage body 26 of the storage bin 25 to complete preheating (usually 300℃-600℃), and then flows through the lower catalyst carrier 27 to undergo methane catalytic oxidation reaction. The oxidation releases heat to generate high-temperature flue gas (temperature can reach 700℃-900℃). The high-temperature flue gas flows down into the high-temperature outlet 131 of the bottom cover 13 and enters the arc-shaped transfer pipe 31 through the outlet pipe 32.

[0083] Heat storage section station: High-temperature flue gas enters the second sector-shaped pipe 23 through the inlet pipe 33 and high-temperature air inlet 132, passes through the storage bin 25 from bottom to top, and the heat is absorbed and stored by the honeycomb ceramic heat storage body 26. The cooled clean exhaust gas is discharged upward from the low-temperature air outlet 122 of the top cover 12.

[0084] Online maintenance station: The fan-shaped baffle 24 isolates the airflow between the upper and lower parts, and there is no gas or flue gas flow in this area; the operator can observe the status of the storage silo 25 through the transparent observation window 81. If the heat storage body or catalyst is blocked or fails, the sealing flap 8 on the side wall of the cylinder 11 can be opened, the bolt can be unscrewed and the blocking plate 28 can be opened, and the storage silo 25 can be pulled out from the disassembly port 212 to complete the packing replacement. The other stations of the equipment continue to operate throughout the process without the need to shut down the entire machine.

[0085] Cyclic process: Driven by the cam divider 292, the rotating bed 21 rotates intermittently at preset time intervals (e.g., once every 30 minutes) (in this embodiment, the rotating bed 21 rotates 45° at a time), so that each sector hole 211 cycles between the oxidation section, the heat storage section and the online maintenance section, thereby achieving continuous and stable gas heat storage catalytic oxidation treatment; the temperature sensor 5 collects the internal temperature of the two sections of the pipe in real time, and the signal is transmitted to the control unit 4. The control unit 4 automatically adjusts the single dwell time of the cam divider 292 according to the reaction temperature to stabilize the oxidation reaction temperature range.

[0086] This embodiment replaces the frequently switching airflow reversing valve in traditional devices with the intermittent indexing rotation of the rotating bed 21, effectively avoiding periodic fluctuations in the temperature field within the heat storage body and making the oxidation efficiency more stable. Simultaneously, the elimination of easily worn reversing valves reduces the risk of gas leakage due to valve seal failure, improving the safety of device operation. The layered structure of each sector 211, with the upper layer filled with honeycomb ceramic heat storage body 26 and the lower layer filled with catalyst carrier 27, allows the gas to be preheated by heat storage before catalytic oxidation, resulting in a more complete and thorough reaction. The honeycomb ceramic heat storage body 26 can also recover reaction heat to maintain the temperature conditions required for subsequent gas intake preheating, reducing external energy consumption. Furthermore, the online maintenance section isolated by the sector partition 24 allows for maintenance or packing replacement of corresponding sectors during operation without shutting down the entire machine, ensuring continuous production.

[0087] Example 2

[0088] This embodiment is a large-flow expansion coal mine gas regenerative catalytic oxidation device adapted for high-volume coal mine exhaust air treatment, and its overall structural framework is completely consistent with that of Embodiment 1.

[0089] The difference is that: in this embodiment, the total height of the regenerative catalytic oxidation device is 4.5m-7.0m, and in this embodiment it is 5.8m; the maximum outer diameter of the cylinder 11 is 2.4m-4.0m, and in this embodiment it is 3.2m.

[0090] In order to avoid airflow deviation and channel blockage, the cross-sectional area of ​​the fan-shaped pipe is expanded simultaneously to increase the gas treatment air volume under high flow conditions. The operating logic of the other zones and the working principle of the rotary indexing are no different from those in Example 1. The rotary bed 21 is used to alternate the oxidation, heat storage and maintenance stations, and the reversing valve structure is eliminated.

[0091] In the outer casing unit 1, the diameters of the low-temperature air inlet 121, the low-temperature air outlet 122, the high-temperature air outlet 131, and the high-temperature air inlet 132 are all DN500-DN800, and in this embodiment, they are DN600; the fan-shaped wrap angles of the first fan-shaped through pipe 22, the second fan-shaped through pipe 23, and the fan-shaped partition 24 are all 90°.

[0092] Inside the processing unit 2, the thickness of the rotating bed 21 is 200mm-300mm, and in this embodiment it is 240mm; four sets of fan-shaped holes 211 are evenly opened in the circumference, and the wrap angle of the fan-shaped holes 211 matches the through pipe at 90°; the diameter of the ventilation micropores 251 in the storage bin 25 is 6mm-10mm, and in this embodiment it is 7mm, which increases the ventilation area to adapt to the large flow rate of air.

[0093] The drive mechanism 29 uses a high-torque cam divider 292, with a single indexing rotation angle of 90° and a single station dwell time ranging from 30 min to 90 min.

[0094] The diameters of the arc-shaped adapter pipe 31, outlet pipe 32, and inlet pipe 33 of pipeline unit 3 are synchronously matched with the air inlet DN600.

[0095] The working process of this embodiment is exactly the same as that of embodiment 1 in terms of airflow circulation and workstation switching logic. The only difference is that the gas treatment air volume is increased per unit time, and the rotating bed 21 switches between the oxidation section, heat storage section and online maintenance section in sequence according to a single 90° index.

[0096] Example 3

[0097] This embodiment is a compact, explosion-proof coal mine gas regenerative catalytic oxidation device adapted for installation in narrow underground coal mine tunnels. The overall vertical structure remains unchanged, and the overall structural frame is completely consistent with that of Embodiment 1.

[0098] The difference is that: in this embodiment, the total height of the regenerative catalytic oxidation device is 1.8m-3.0m, and in this embodiment it is 2.4m; the maximum outer diameter of the cylinder 11 is 0.8m-1.5m, and in this embodiment it is 1.2m.

[0099] Due to limited space in the downhole working conditions, large reversing valves cannot be installed. This compact structure continues the rotating bed design without reversing, and simultaneously reduces the cross-sectional area of ​​the fan-shaped pipe. The operating logic of the other zones and the working principle of the rotation indexing are no different from those in Example 1. It also relies on the rotating bed 21 to alternate the oxidation, heat storage and maintenance stations.

[0100] In the outer casing unit 1, the diameters of the low-temperature air inlet 121, the low-temperature air outlet 122, the high-temperature air outlet 131, and the high-temperature air inlet 132 are all DN100-DN250, and in this embodiment, they are DN150; the fan-shaped wrap angles of the first fan-shaped through pipe 22, the second fan-shaped through pipe 23, and the fan-shaped partition 24 are all 30°.

[0101] Inside the processing unit 2, the thickness of the rotating bed 21 is 80mm-140mm, and in this embodiment it is 110mm; 12 sets of fan-shaped holes 211 are evenly opened in the circumference, and the wrap angle of the fan-shaped holes 211 matches the through pipe at 30°; the diameter of the ventilation micropores 251 in the storage bin 25 is 2mm-6mm, and in this embodiment it is 4mm.

[0102] The drive mechanism 29 uses a small explosion-proof cam divider 292, with a single indexing rotation angle of 30° and a single station dwell time ranging from 15 min to 40 min.

[0103] The diameters of the arc-shaped adapter pipe 31, outlet pipe 32, and inlet pipe 33 of pipeline unit 3 are synchronously matched with the air inlet DN150.

[0104] The working process of this embodiment is exactly the same as that of embodiment 1 in terms of airflow circulation and workstation switching logic. The only difference is that the gas treatment air volume is reduced per unit time, and the rotating bed 21 switches between the oxidation section, heat storage section and online maintenance section in 30° single-stage increments.

[0105] It should be noted that the above electrical components are all commercially available conventional equipment with built-in power switches. Those skilled in the art can make conventional selections according to their needs. Their working principles are common knowledge known to those skilled in the art and have been fully disclosed in the prior art, so they will not be elaborated on further in this article.

[0106] The circuit connection involved in this invention is a conventional method used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. It belongs to the widely used prior art.

[0107] Components not described in detail in this article are existing technologies.

[0108] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A coal mine gas regenerative catalytic oxidation device, comprising an outer shell unit (1), a processing unit (2), a pipeline unit (3), and a control unit (4), characterized in that: The outer shell unit (1) includes a cylindrical body (11), a top cover (12) and a bottom cover (13). The top cover (12) is provided with a low temperature air inlet (121) and a low temperature air outlet (122), and the bottom cover (13) is provided with a high temperature air outlet (131) and a high temperature air inlet (132). A first sector-shaped through pipe (22), a second sector-shaped through pipe (23), and a sector-shaped partition (24) are fixed inside the cylinder (11); The processing unit (2) includes a rotating bed (21) and a drive mechanism (29). The rotating bed (21) has several fan-shaped holes (211) arranged around its circumference. Storage bins (25) are arranged in layers inside the fan-shaped holes (211). The upper layer is filled with honeycomb ceramic heat storage body (26) and the lower layer is filled with catalyst carrier (27). The bottom surface of the storage bins (25) is evenly distributed with breathable micropores (251). The drive mechanism (29) drives the rotating bed (21) to rotate intermittently, so that the sector holes (211) correspond to the first sector through pipe (22) to form an oxidation section, correspond to the second sector through pipe (23) to form a heat storage section, and correspond to the sector partition (24) to form an online maintenance section. The control unit (4) is electrically connected to the drive mechanism (29).

2. The regenerative catalytic oxidation device for coal mine gas as described in claim 1, characterized in that: There are two first sector-shaped through pipes (22), and the two first sector-shaped through pipes (22) are symmetrically distributed about the axis of the rotating bed (21); There are two second sector-shaped through pipes (23), and the two second sector-shaped through pipes (23) are symmetrically distributed about the axis of the rotating bed (21); The sector-shaped baffle (24) is disposed between adjacent first sector-shaped pipe (22) and second sector-shaped pipe (23) to completely isolate the corresponding sector-shaped holes (211) to form an online maintenance section.

3. The regenerative catalytic oxidation device for coal mine gas as described in claim 1, characterized in that: The pipeline unit (3) includes an arc-shaped adapter pipe (31), an outlet pipe (32), and an inlet pipe (33). The arc-shaped adapter pipe (31) is fixed to the outer wall of the cylinder (11), the outlet pipe (32) is connected between one end of the arc-shaped adapter pipe (31) and the high-temperature air outlet (131), and the inlet pipe (33) is connected between the other end of the arc-shaped adapter pipe (31) and the high-temperature air inlet (132).

4. The regenerative catalytic oxidation device for coal mine gas as described in claim 1, characterized in that: Graphite sealing rings (6) are fixed in the rotational fit gap between the outer peripheral surface of the rotating bed (21) and the cylinder (11), as well as between the axial end face of the first sector-shaped pipe (22), the second sector-shaped pipe (23), the sector-shaped partition (24) and the rotating bed (21).

5. The regenerative catalytic oxidation device for coal mine gas as described in claim 1, characterized in that: The drive mechanism (29) includes a rotating column (291) and a cam divider (292). One end of the rotating column (291) is fixedly connected to the rotating bed (21), and the other end is connected to the output end of the cam divider (292), and the cam divider (292) is fixed to the bottom surface of the bottom cover (13); The control unit (4) is electrically connected to the cam divider (292).

6. The regenerative catalytic oxidation device for coal mine gas as described in claim 1, characterized in that: Temperature sensors (5) are fixed on both the top cover (12) and the bottom cover (13), and the temperature sensors (5) are respectively set for the first sector-shaped pipe (22) and the second sector-shaped pipe (23); The temperature sensor (5) is electrically connected to the control unit (4).

7. The regenerative catalytic oxidation device for coal mine gas as described in claim 1, characterized in that: It also includes a sealing flap (8), a flip screw (9), and a wing nut (10); The rotating bed (21) has a disassembly port (212) at the position corresponding to the fan-shaped hole (211), and the storage bin (25) is slidably inserted into the fan-shaped hole (211) through the disassembly port (212); The cylinder (11) has an inspection window (111) on its side wall. The sealing flap (8) is hinged to the outside of the port of the inspection window (111). The sealing flap (8) is embedded with a transparent observation window (81). The inner side wall of the sealing flap (8) is rotatably equipped with a pressure roller (83). The flip screw (9) is hinged to the outer wall of the inspection window (111) via the hinge seat (91); The free end of the sealing flap (8) is fixed with a limiting block (82), and the limiting block (82) is provided with a positioning groove (821). The flip screw (9) is inserted into the positioning groove (821) and locked by a wing nut (10).

8. A coal mine gas regenerative catalytic oxidation device according to claim 7, characterized in that: A blocking plate (28) is detachably connected to the disassembly port (212), and a positioning groove (213) for accommodating the blocking plate (28) is provided on the rotating bed (21) near the disassembly port (212). The blocking plate (28) has an installation hole (281), and the rotating bed (21) has a corresponding threaded hole (214).

9. A coal mine gas regenerative catalytic oxidation device according to claim 1, characterized in that: An S-shaped channel (221) is provided in the first sector-shaped pipe (22) near the low-temperature air inlet (121).

10. A coal mine gas regenerative catalytic oxidation device according to claim 9, characterized in that: Multiple sets of baffles (7) are fixed inside the first sector-shaped pipe (22) near the low-temperature air inlet (121), which are staggered and symmetrically distributed along its axis. The baffles (7) divide the inner space of the first sector-shaped pipe (22) into continuous S-shaped channels (221).

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