Dust suppression device for graphitization furnace

Abstract

This invention relates to a dust suppression device for a graphitization furnace, belonging to the technical field of Atchison furnaces. It includes a dust collection cylinder with an exhaust pipe passing through its top; an annular gas pipe with an inlet pipe connected to one side; an air inlet assembly connecting the dust collection cylinder and the annular gas pipe, comprising an inlet pipe and a compression pipe, the two ends of which are connected to the annular gas pipe and the dust collection cylinder respectively, with piston blocks located at the end of the compression pipe near the dust collection cylinder; a check valve mechanism located at the end of the inlet pipe near the annular gas pipe; one end of the inlet pipe connecting to the portion of the compression pipe located between the piston blocks and the check valve mechanism; and the other end connecting to the dust collection cylinder; an annular heat exchange tube sleeved outside the dust collection cylinder and located inside the annular gas pipe; and a drive mechanism for driving several piston blocks to reciprocate along the compression pipe. This invention solves the problem of excessive particulate matter in desulfurization wastewater in existing technologies.

Description

Technical Field

[0001] This invention relates to a dust suppression device for a graphitization furnace, belonging to the technical field of Atchison furnaces. Background Technology

[0002] With the rapid development of the new energy vehicle industry, the annual output of lithium-ion batteries has increased dramatically, leading to a significant surge in demand for anode materials. The anode materials for lithium-ion batteries used in new energy vehicles are primarily artificial graphite powder, which exhibits good compatibility with electrolytes and excellent charge-discharge performance. Graphitization furnaces, such as the Acheson furnace, are the most commonly used equipment for producing this artificial graphite powder. The graphitization process for artificial anode materials typically reaches temperatures of 2800℃ to 3000℃. The materials in the furnace generate a large amount of flue gas at these high temperatures, with sulfur dioxide (SO2) being a significant component. Direct inhalation of SO2 can affect respiratory health, and emissions into the atmosphere can contribute to acid rain and damage the soil environment. Therefore, the flue gas produced by the graphitization furnace must be desulfurized before being released into the atmosphere.

[0003] A search revealed a method and equipment for defluorination, desulfurization, and dust removal of kiln flue gas, disclosed in Chinese patent publication number CN109621646A. The key technical points are: it includes a defluorination unit, a desulfurization unit, and a dust removal unit connected in series. The defluorination unit uses water to wash high-concentration SiF4 gas in the flue gas to generate fluorosilicic acid (H2SiF6) and silica gel (SiO2), thus recovering fluorine resources. The defluorination unit equipment includes: a defluorination tower, a process water tank, a spray main pipe, defluorination tower nozzles, a defluorination process water pump, a defluorination process water flow meter, a return material crystallization tank, and wire mesh packing. The desulfurization unit equipment includes: a desulfurization tower, a Venturi device, a Venturi diffuser section, desulfurization nozzles, a desulfurization water pump, a return material chute manual valve, and a quicklime conveying device. The dust removal unit equipment includes: a bag filter, a return material air chute, a circulating ash flow regulating valve, an external ash discharge pneumatic valve, a silo pump, an ash silo, a fluidizing fan, a flue gas induced draft fan, and a chimney.

[0004] The above solution achieves the goal of pollution-free emissions by sequentially defluorinating, desulfurizing, and removing dust from the exhaust gas. As mentioned above, existing related technologies generally use wet desulfurization and place the dust removal at the bottom of the desulfurization process. This results in a large amount of dust particles in the waste liquid generated by wet desulfurization, making it impossible to directly recycle the waste liquid. Further treatment is required, which is complicated and costly. However, if the bag filter located at the tail end is moved directly to the front end, the high-temperature flue gas can easily burn the filter belt inside the bag filter, resulting in a very short service life.

[0005] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a dust suppression device for a graphitization furnace, which solves the problem of excessive dust particles in desulfurization waste liquid in the prior art.

[0007] The technical problem to be solved by this invention is achieved by the following technical solution:

[0008] A dust suppression device for a graphitization furnace includes:

[0009] A dust collector cylinder includes a cylindrical section at the top and a conical section connected to the bottom of the cylindrical section. A smoke exhaust pipe is provided at the top of the dust collector cylinder, and the smoke exhaust pipe is coaxially arranged with the dust collector cylinder. A dust collection box is provided at the bottom of the dust collector cylinder.

[0010] An annular air pipe is sleeved on the outside of the dust collector cylinder, and a smoke inlet pipe is connected to one side of the annular air pipe;

[0011] An air intake assembly is connected between the dust collector cylinder and the annular air pipe, and several sets are evenly arranged around the circumference of the dust collector cylinder;

[0012] The air intake assembly includes an air intake pipe and a compression pipe. The two ends of the compression pipe are respectively connected to the annular air pipe and the dust collector. A piston block is provided at the end of the compression pipe near the dust collector. A check valve mechanism is provided at the end of the air intake pipe near the annular air pipe. One end of the air intake pipe is connected to the portion of the compression pipe located between the piston block and the check valve mechanism. The other end of the air intake pipe is connected to the dust collector.

[0013] An annular heat exchange tube is sleeved outside the dust collector and located inside the annular gas pipe. The compression pipe passes through the annular heat exchange tube, and an inlet pipe and an outlet pipe are respectively provided at the bottom of both sides of the annular heat exchange tube.

[0014] A drive mechanism is used to drive several piston blocks to reciprocate along the compression tube.

[0015] The present invention is further configured such that: a plurality of the air inlet pipes are arranged tangentially along the dust collector cylinder, and the end of the air inlet pipe near the dust collector cylinder is inclined downward.

[0016] The present invention is further configured such that: the driving mechanism includes a rotating sleeve rotatably sleeved on the exhaust pipe and an eccentric wheel fixedly connected to the outer wall of the rotating sleeve; the eccentric wheel has a circumferentially extending groove on its peripheral wall; the piston block is fixedly connected to a connecting rod extending into the dust collector at one end near the dust collector; the end of the connecting rod is fixedly connected to a slider slidably connected in the groove; both the slider and the groove are T-shaped.

[0017] The top of the rotating sleeve extends through and above the dust collector cylinder. A worm gear is fixedly connected to the top of the outer wall of the rotating sleeve. A worm is rotatably supported on the top of the dust collector cylinder via a bearing seat. One end of the worm is connected to a motor.

[0018] The present invention is further configured such that: each of the intake pipes is provided with a valve mechanism for opening and closing the interface between the intake pipe and the compression pipe; the valve mechanism includes a first insertion shell fixedly connected to the outer wall of the compression pipe and located on the side of the intake pipe near the piston block; a second insertion shell fixedly connected to the outer wall of the compression pipe and located on the side of the intake pipe near the check mechanism; a sealing plate slidably inserted into the first insertion shell; and a linkage member disposed between the sealing plate and the piston block; both the first insertion shell and the second insertion shell are connected to the intake pipe; when the sealing plate is inserted into the second insertion shell, the intake pipe is closed.

[0019] The present invention is further configured such that: the linkage includes a movable shell fixedly connected to the outer wall of the compression tube and extending along its length direction; a movable groove formed in the inner wall of the compression tube and communicating with the interior of the movable shell; a connecting ring fixedly connected to the side of the piston block and slidably connected to the movable shell; and a driving rod disposed in the movable shell along the length direction of the movable shell. The connecting ring is slidably sleeved on the driving rod, and the inner wall of the connecting ring and the driving rod are in an interference fit. The driving rod passes through the movable shell and the first plug-in shell and is fixedly connected to the sealing plate.

[0020] The present invention is further configured such that: the check valve mechanism includes a support ring fixedly connected inside the compression tube, a sealing block located on the side of the support ring near the piston block, and an elastic support member disposed on the sealing block and the inner wall of the compression tube; the inner diameter of the support ring gradually decreases in the direction away from the piston block; the sealing block is frustoconical in shape; the diameter of the sealing block gradually increases in the direction away from the piston block and cooperates with the inner wall of the support ring.

[0021] The elastic support includes a fixed ring disposed on the side of the support ring away from the piston block, a plurality of fixed rods fixedly connected between the outer wall of the fixed ring and the inner wall of the compression tube, a limiting post slidably inserted into the fixed ring and fixedly connected at one end to the sealing block, a limiting block fixedly connected to the other end of the limiting post, and a return spring sleeved on the limiting post and with its two ends respectively abutting against the limiting block and the fixed ring.

[0022] The present invention is further configured such that: a gas collecting cylinder is provided at the bottom of the exhaust pipe, the gas collecting cylinder is flared and has a plurality of screening holes around its periphery, a fixed shaft is provided inside the gas collecting cylinder, and a spiral blade is provided between the fixed shaft and the gas collecting cylinder.

[0023] The invention is further configured such that: the gas collecting cylinder and the exhaust pipe are rotatably coupled; the top of the inner wall of the gas collecting cylinder is provided with an installation ring groove extending around its circumference; the bottom of the outer wall of the exhaust pipe is fixedly connected with a positioning ring rotatably connected in the installation ring groove; a thrust ball bearing is provided between the top of the positioning ring and the top of the installation ring groove; and a transmission mechanism is provided between the eccentric wheel and the gas collecting cylinder.

[0024] The present invention is further configured such that: the transmission mechanism includes a rotating ring fixedly connected to the outer wall of the gas collecting cylinder, a support base fixedly connected to the outer wall of the exhaust pipe, a first rotating shaft and a second rotating shaft rotatably supported on the support base and parallel to the exhaust pipe, a first bevel gear fixedly connected to the bottom of the eccentric wheel and coaxially arranged with its rotation axis, a second bevel gear fixedly connected to the top of the first rotating shaft and meshing with the first bevel gear, a third bevel gear coaxially fixedly connected to the top end face of the rotating ring, a fourth bevel gear fixedly connected to the bottom end of the second bevel gear and meshing with the third bevel gear, and a speed regulating component disposed on the support base for adjusting the transmission ratio between the first rotating shaft and the second rotating shaft.

[0025] The present invention is further configured such that: the speed regulating component includes a mounting cavity formed in the support base, a first conical friction wheel coaxially fixedly connected to the first rotating shaft, a second conical friction wheel coaxially fixedly connected to the second rotating shaft, a drive screw rotatably supported in the mounting cavity and located between the first and second conical friction wheels, a moving block threadedly connected to the drive screw, a connecting ring groove formed in the moving block and extending circumferentially therearound, and a transmission friction wheel rotatably connected in the connecting ring groove and abutting against the first and second conical friction wheels on both sides respectively. One end of the drive screw extends out of the support base and is provided with a hexagonal block. A guide rod parallel to the drive screw is fixedly connected to the inner wall of the mounting cavity. The moving block is slidably connected to the guide rod. The generatrices of the first and second conical friction wheels that are close to each other are parallel.

[0026] The beneficial effects of this invention are:

[0027] 1. By coordinating a dust collector, annular gas pipe, air inlet assembly, annular heat exchanger tube, and drive mechanism, the flue gas discharged from the graphitization furnace is first introduced into the annular gas pipe through the inlet pipe, creating a certain positive pressure within the annular gas pipe. When the pressure within the annular gas pipe is greater than the pressure within the compression pipe, the flue gas passes through the check valve mechanism into the compression pipe, filling it with flue gas and sealing it within the compression pipe through the valve mechanism. At this point, the drive motor rotates the eccentric wheel via the rotating sleeve. During the rotation of the eccentric wheel, the connecting rod drives the piston block to reciprocate along the length of the compression pipe through the connection of the slider and the slide groove. As the piston block moves away from the dust collector, it compresses the flue gas within the compression pipe. At this time, the pressure within the compression pipe is greater than the pressure within the annular gas pipe, and the check valve mechanism is in a closed state. The gas in the compression pipe releases heat during compression, thus... The tube wall transfers heat to the heat exchange medium inside the annular heat exchange tube, cooling the flue gas. When the piston block moves towards the dust collector, the connection ring and drive rod work together to open the interface between the inlet pipe and the compression pipe, allowing the high-pressure flue gas to be quickly discharged into the dust collector through the inlet block. Since the flue gas inlet direction is tangential, the flue gas flow rotates around the perimeter of the dust collector after entering it. Under the action of centrifugal force, the dust in the flue gas adheres tightly to the inner wall of the conical section and is finally discharged into the dust collection box. The flue gas, due to the gathering effect at the bottom of the conical section, flows upward and eventually enters the exhaust pipe for discharge. It then enters the desulfurization tower through the exhaust pipe for wet desulfurization, reducing the amount of dust particles in the desulfurized waste liquid. When the air pressure in the compression pipe is lower than the air pressure in the annular gas pipe, the seal block is pushed open by the air pressure, and the annular gas pipe enters the compression pipe again for cyclic compression and heat release.

[0028] 2. By setting up a gas collection cylinder and installing spiral blades inside the gas collection cylinder, the spirally rising flue gas enters the gas collection cylinder and continues to flow along the spiral line. During this process, some smaller dust particles that rise with the flue gas are further thrown out of the gas collection cylinder through the screening holes under the action of centrifugal force, thereby improving the dust removal effect on the flue gas.

[0029] 3. By setting a transmission mechanism between the gas collecting cylinder and the eccentric wheel, when the eccentric wheel rotates, the transmission cooperation of the first bevel gear, the second bevel gear, the speed regulating component, the third bevel gear and the fourth bevel gear drives the gas collecting cylinder to rotate synchronously. When the spiral blades rotate, they generate suction force on the flue gas inside the dust collector, thereby accelerating the discharge of the flue gas and causing the gas collecting cylinder to rotate actively, so that the flue gas rotates more rapidly after entering the gas collecting cylinder, resulting in a better separation effect of dust particles.

[0030] 4. By setting a speed regulating component, when it is necessary to adjust the flue gas outlet rate, the drive screw is rotated, causing the moving block threaded to the drive screw to move along the gap between the first conical friction wheel or the second conical friction wheel under the cooperation of the guide rod. This synchronously drives the transmission friction wheel to move, changing the connection point between the first and second conical friction wheels, that is, changing the transmission ratio between the first and second conical friction wheels. This causes the speed of the gas collecting cylinder to increase or decrease, thereby increasing or decreasing the suction force of the gas collecting cylinder on the flue gas, that is, adjusting the flue gas outlet rate. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 This is an overall sectional view of the present invention.

[0033] Figure 3 This is an overall sectional view of the present invention.

[0034] Figure 4 yes Figure 2 A magnified view of part A in the middle.

[0035] Figure 5 yes Figure 2 A magnified view of part B in the middle section.

[0036] Figure 6 yes Figure 3 A magnified view of part C in the middle.

[0037] Figure 7 yes Figure 6 A magnified view of part D in the middle.

[0038] In the diagram: 1. Dust collector; 2. Annular air pipe; 3. Air inlet assembly; 4. Annular heat exchanger tube; 5. Drive mechanism; 6. Cylindrical section; 7. Conical section; 8. Dust collection box; 9. Exhaust pipe; 10. Smoke inlet pipe; 11. Air inlet pipe; 12. Compression pipe; 13. Piston block; 14. Check valve mechanism; 15. Rotating sleeve; 16. Eccentric wheel; 17. Slide groove; 18. Connecting rod; 19. Slider; 20. Worm gear; 21. Worm; 22. Motor; 23. Support ring; 24. Sealing block; 25. Elastic support; 26. Fixing ring; 27. Fixing rod; 28. Limiting post; 29. ​​Limiting block; 30. Return spring; 31. Valve mechanism; 32. First insertion shell; 33. Second insertion shell; 34. Sealing plate; 35. 36. Linkage component; 37. Moving shell; 38. Moving groove; 39. Connecting ring; 40. Drive rod; 41. Gas collecting cylinder; 42. Screening hole; 43. Fixed shaft; 44. Spiral blade; 45. Mounting ring groove; 46. Positioning ring; 47. Thrust ball bearing; 48. Transmission mechanism; 49. Rotating ring; 50. Support base; 51. First rotating shaft; 52. Second rotating shaft; 53. First bevel gear; 54. Second bevel gear; 55. Third bevel gear; 56. Fourth bevel gear; 57. Speed ​​regulating component; 58. Mounting cavity; 59. First conical friction wheel; 60. Second conical friction wheel; 61. Drive screw; 62. Moving block; 63. Connecting ring groove; 64. Transmission friction wheel; 65. Hexagonal block; 66. Guide rod. Detailed Implementation

[0039] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this invention, the invention will be further described below in conjunction with specific illustrations.

[0040] like Figures 1-7 As shown, a dust suppression device for a graphitization furnace includes a dust collection cylinder 1, an annular air pipe 2, an air inlet assembly 3, an annular heat exchange pipe 4, and a drive mechanism 5. The dust collection cylinder 1 includes a cylindrical section 6 at the top and a conical section 7 connected to the bottom of the cylindrical section 6. That is, the bottom of the dust collection cylinder 1 has a gradually decreasing diameter. A dust collection box 8 is provided at the bottom of the dust collection cylinder 1, and an exhaust pipe 9 is provided at the top of the dust collection cylinder 1. The exhaust pipe 9 is coaxially arranged with the dust collection cylinder 1.

[0041] Both the annular gas pipe 2 and the annular heat exchange pipe 4 are sleeved on the outside of the cylindrical section 6 of the dust collector 1. The annular heat exchange pipe 4 is located inside the annular gas pipe 2, and the annular gas pipe 2 and the annular heat exchange pipe 4 are located on the same horizontal plane. The annular gas pipe 2 is connected to a flue gas inlet pipe 10 on one side. The flue gas inlet pipe 10 is connected to the exhaust port of the graphitization furnace through an air pump (not shown in the figure).

[0042] The air intake assembly 3 connects the dust collector cylinder 1 and the annular air pipe 2, and several sets are evenly arranged around the circumference of the dust collector cylinder 1 for intermittent air intake into the dust collector cylinder 1. The air intake assembly 3 includes an air intake pipe 11 and a compression pipe 12. The two ends of the compression pipe 12 are connected to the annular air pipe 2 and the dust collector cylinder 1, respectively, and the compression pipe 12 extends radially along the dust collector cylinder 1. A piston block 13 is provided at the end of the compression pipe 12 near the dust collector cylinder 1. A check mechanism 14 is provided at the end of the air intake pipe 11 near the annular air pipe 2. One end of the air intake pipe 11 is connected to the part of the compression pipe 12 located between the piston block 13 and the check mechanism 14, and the other end of the air intake pipe 11 is connected to the dust collector cylinder 1. Several air intake pipes 11 are arranged tangentially along the dust collector cylinder 1, and the end of the air intake pipe 11 near the dust collector cylinder 1 is inclined downward. To facilitate heat exchange of the flue gas inside the compression tube 12, the compression tube 12 passes through the annular heat exchange tube 4, that is, the annular heat exchange tube 4 covers the compression tube 12, and the bottom of both sides of the annular heat exchange tube 4 is provided with an inlet pipe and an outlet pipe respectively.

[0043] The drive mechanism 5 is used to drive several piston blocks 13 to reciprocate along the compression tube 12. The drive mechanism 5 includes a rotating sleeve 15 rotatably fitted onto the exhaust pipe 9 and an eccentric wheel 16 fixedly connected to the outer wall of the rotating sleeve 15. The eccentric wheel 16 has a groove 17 extending circumferentially around it on its peripheral wall. The piston block 13 is fixedly connected to a connecting rod 18 extending into the dust collector 1 at one end near the dust collector 1. The end of the connecting rod 18 is fixedly connected to a slider 19 slidably connected in the groove 17. Both the slider 19 and the groove 17 are T-shaped. When the eccentric wheel 16 rotates, the connecting rod 18 drives the piston block 13 to reciprocate along the length of the compression pipe 12 through the connection of the slider 19 and the groove 17. When the piston block 13 moves away from the dust collector 1, it compresses the flue gas in the compression pipe 12. When the piston block 13 moves towards the dust collector 1, the air pressure in the compression pipe 12 is less than the air pressure in the annular air pipe 2, and the flue gas enters the compression pipe 12 through the check mechanism 14.

[0044] To facilitate the rotation of the eccentric wheel 16 and to provide the eccentric wheel 16 with a large driving force, the top of the rotating sleeve 15 extends through and above the dust collector 1. A worm gear 20 is fixedly connected to the top of the outer wall of the rotating sleeve 15. The top of the dust collector 1 is rotatably supported by a worm 21 through a bearing seat. One end of the worm 21 is connected to a motor 22.

[0045] The check valve mechanism 14 includes a support ring 23 fixedly connected inside the compression tube 12, a sealing block 24 located on the side of the support ring 23 near the piston block 13, and an elastic support member 25 disposed on the sealing block 24 and the inner wall of the compression tube 12. The inner diameter of the support ring 23 gradually decreases in the direction away from the piston block 13. The sealing block 24 is frustoconical in shape, and the diameter of the sealing block 24 gradually increases in the direction away from the piston block 13 and cooperates with the inner wall of the support ring 23.

[0046] The elastic support 25 includes a fixed ring 26 disposed on the side of the support ring 23 away from the piston block 13, several fixed rods 27 fixedly connected between the outer wall of the fixed ring 26 and the inner wall of the compression tube 12, a limiting post 28 slidably inserted into the fixed ring 26 and fixedly connected at one end to the sealing block 24, a limiting block 29 fixedly connected to the other end of the limiting post 28, and a return spring 30 sleeved on the limiting post 28 and abutting the limiting block 29 and the fixed ring 26 at both ends respectively.

[0047] With the cooperation of the support ring 23, the sealing block 24 and the elastic support 25, when the air pressure in the circumferential air pipe is greater than the air pressure in the compression pipe 12, the air pressure overcomes the elastic force of the return spring 30 and pushes open the sealing block 24 to allow the flue gas to enter the compression pipe 12. When the air pressure in the compression pipe 12 is greater than the air pressure in the annular air pipe 2, under the action of the air pressure, the sealing block 24 is tightly attached to the inner wall of the support ring 23, and the check mechanism 14 is in a closed state, sealing the compression pipe 12.

[0048] To achieve higher compression efficiency when the piston block 13 compresses the flue gas in the compression pipe 12, the intake pipe 11 is equipped with a valve mechanism 31 for opening and closing the interface between the intake pipe 11 and the compression pipe 12. The valve mechanism 31 includes a first insertion shell 32 fixedly connected to the outer wall of the compression pipe 12 and located on the side of the intake pipe 11 near the piston block 13, a second insertion shell 33 fixedly connected to the outer wall of the compression pipe 12 and located on the side of the intake pipe 11 near the check mechanism 14, a sealing plate 34 slidably inserted into the first insertion shell 32, and a linkage 35 disposed between the sealing plate 34 and the piston block 13. Both the first insertion shell 32 and the second insertion shell 33 are connected to the intake pipe 11. When the sealing plate 34 is inserted into the second insertion shell 33, the intake pipe 11 is closed.

[0049] The linkage 35 includes a movable shell 36 fixedly connected to the outer wall of the compression tube 12 and extending along its length, a movable groove 37 opened in the inner wall of the compression tube 12 and communicating with the interior of the movable shell 36, a connecting ring 38 fixedly connected to the side of the piston block 13 and slidably connected to the movable shell 36, and a drive rod 39 disposed in the movable shell 36 along the length of the movable shell 36. The connecting ring 38 is slidably sleeved on the drive rod 39, and the inner wall of the connecting ring 38 and the drive rod 39 are in an interference fit. The drive rod 39 passes through the movable shell 36 and the first insertion shell 32 and is fixedly connected to the sealing plate 34.

[0050] When the piston block 13 moves toward the dust collector 1, the sealing plate 34 opens the interface between the air inlet pipe 11 and the compression pipe 12 through the cooperation of the connecting ring 38 and the drive rod 39, so that the high-pressure flue gas is quickly discharged into the dust collector 1 through the air inlet block.

[0051] The bottom of the exhaust pipe 9 is equipped with a gas collecting cylinder 40. The gas collecting cylinder 40 is flared and has several screening holes 41 around its perimeter. Inside the gas collecting cylinder 40, there is a fixed shaft 42, and a spiral blade 43 is provided between the fixed shaft 42 and the gas collecting cylinder 40. By setting up the gas collecting cylinder 40 and installing the spiral blade 43 inside the gas collecting cylinder 40, the spirally rising flue gas enters the gas collecting cylinder 40 and continues to flow along the spiral line. During this process, some smaller dust particles that rise with the flue gas are further thrown out of the gas collecting cylinder 40 through the screening holes 41 under the action of centrifugal force, thereby improving the dust removal effect on the flue gas.

[0052] To improve the exhaust effect of flue gas, the gas collecting cylinder 40 and the exhaust pipe 9 are rotatably connected. The top of the inner wall of the gas collecting cylinder 40 is provided with an installation ring groove 44 extending around its circumference. The bottom of the outer wall of the exhaust pipe 9 is fixedly connected with a positioning ring 45 that is rotatably connected in the installation ring groove 44. A thrust ball bearing 46 is provided between the top of the positioning ring 45 and the top of the installation ring groove 44.

[0053] A transmission mechanism 47 is provided between the eccentric wheel 16 and the air collecting cylinder 40. The transmission mechanism 47 includes a rotating ring 48 fixedly connected to the outer wall of the air collecting cylinder 40, a support base 49 fixedly connected to the outer wall of the exhaust pipe 9, a first rotating shaft 50 and a second rotating shaft 51 rotatably supported on the support base 49 and parallel to the exhaust pipe 9, a first bevel gear 52 fixedly connected to the bottom of the eccentric wheel 16 and coaxially arranged with its rotation axis, a second bevel gear 53 fixedly connected to the top of the first rotating shaft 50 and meshing with the first bevel gear 52, a third bevel gear 54 coaxially fixedly connected to the top end face of the rotating ring 48, a fourth bevel gear 55 fixedly connected to the bottom end of the second bevel gear 53 and meshing with the third bevel gear 54, and a speed regulating component 56 provided on the support base 49 for adjusting the transmission ratio between the first rotating shaft 50 and the second rotating shaft 51.

[0054] When the eccentric wheel 16 rotates, the transmission cooperation of the first bevel gear 52, the second bevel gear 53, the speed regulating component 56, the third bevel gear 54, and the fourth bevel gear 55 drives the gas collecting cylinder 40 to rotate synchronously. When the spiral blades 43 rotate, they generate suction force on the flue gas inside the dust collector 1, thereby accelerating the discharge of the flue gas and causing the gas collecting cylinder 40 to rotate actively, so that the flue gas rotates more rapidly after entering the gas collecting cylinder 40, resulting in a better separation effect of dust particles.

[0055] The speed regulating component 56 includes a mounting cavity 57 opened in the support base 49, a first conical friction wheel 58 coaxially fixedly connected to the first rotating shaft 50, a second conical friction wheel 59 coaxially fixedly connected to the second rotating shaft 51, a drive screw 60 rotatably supported in the mounting cavity 57 and located between the first conical friction wheel 58 and the second conical friction wheel 59, a moving block 61 threadedly connected to the drive screw 60, a connecting ring groove 62 opened in the moving block 61 and extending around it circumferentially, and a transmission friction wheel 63 rotatably connected in the connecting ring groove 62 and abutting against the first conical friction wheel 58 and the second conical friction wheel 59 on both sides respectively. One end of the drive screw 60 extends out of the support base 49 and is provided with a hexagonal block 64. A guide rod 65 parallel to the drive screw 60 is fixedly connected to the inner wall of the mounting cavity 57. The moving block 61 is slidably connected to the guide rod 65. The generatrices of the first conical friction wheel 58 and the second conical friction wheel 59 are parallel on the side that are close to each other.

[0056] When it is necessary to adjust the flue gas output rate, by rotating the drive screw 60, the moving block 61 threaded to the drive screw 60 moves along the gap between the first conical friction wheel 58 or the second conical friction wheel 59 under the cooperation of the guide rod 65, synchronously driving the transmission friction wheel 63 to move, thereby changing the connection point between the first conical friction wheel 58 and the second conical friction wheel 59, that is, changing the transmission ratio between the first conical friction wheel 58 and the second conical friction wheel 59, so that the rotation speed of the gas collecting cylinder 40 increases or decreases, thereby increasing or decreasing the suction force of the gas collecting cylinder 40 on the flue gas, that is, adjusting the flue gas output rate.

[0057] The implementation principle of this invention is as follows:

[0058] When treating the flue gas discharged from the graphitization furnace, the flue gas is first introduced into the annular gas pipe 2 through the flue gas inlet pipe 10, so that the annular gas pipe 2 has a certain positive pressure. When the gas pressure in the annular gas pipe is greater than the gas pressure in the compression pipe 12, the flue gas enters the compression pipe 12 through the check mechanism 14, filling the compression pipe 12 with flue gas and sealing it through the valve mechanism 31. At this time, the drive motor 22 drives the eccentric wheel 16 to rotate through the rotating sleeve 15. During the rotation of the eccentric wheel 16, through the connection of the slider 19 and the slide groove 17, the connecting rod 18 drives the piston block 13 to move back and forth along the length of the compression pipe 12. When the piston block 13 moves away from the dust collector 1, it compresses the flue gas in the compression pipe 12. At this time, the gas pressure in the compression pipe 12 is greater than the gas pressure in the annular gas pipe 2, and the check mechanism 14 is in a closed state. The gas in the compression pipe 12 releases heat due to compression, and the heat is transferred through the wall of the compression pipe 12 to The heat exchange medium inside the annular heat exchange tube 4 cools the flue gas. When the piston block 13 moves towards the dust collector 1, the connecting ring 38 and the drive rod 39 cooperate to open the interface between the inlet pipe 11 and the compression pipe 12, allowing the high-pressure flue gas to be quickly discharged into the dust collector 1 through the inlet block. Since the flue gas inlet direction is tangential, the flue gas flow rotates around the circumference of the dust collector 1 after entering it. Under the action of centrifugal force, the dust in the flue gas adheres tightly to the annular heat exchange tube 4. The inner wall of the conical section 7 eventually discharges into the dust collection box 8, while the flue gas, due to the gathering effect at the bottom of the conical section 7, flows upward and eventually enters the exhaust pipe 9 for discharge. It then enters the desulfurization tower through the exhaust pipe 9 for wet desulfurization, reducing the excessive amount of dust particles in the desulfurized waste liquid. When the air pressure in the compression pipe 12 is less than the air pressure in the annular air pipe 2, the sealing block 24 is pushed open by the air pressure, and the annular air pipe 2 enters the compression pipe 12 again for cyclic compression and heat release.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust suppression device for a graphitization furnace, characterized in that, include: A dust collector (1) includes a cylindrical section (6) at the top and a conical section (7) connected to the bottom of the cylindrical section (6). A smoke exhaust pipe (9) is provided at the top of the dust collector (1), and the smoke exhaust pipe (9) is coaxially arranged with the dust collector (1). A dust collection box (8) is provided at the bottom of the dust collector (1). An annular air pipe (2) is sleeved on the outside of the dust collector (1), and a smoke inlet pipe (10) is connected to one side of the annular air pipe (2); The air intake assembly (3) is connected between the dust collector (1) and the annular air pipe (2), and several sets are evenly arranged around the dust collector (1). The air intake assembly (3) includes an air intake pipe (11) and a compression pipe (12). The two ends of the compression pipe (12) are respectively connected to the annular air pipe (2) and the dust collector (1). A piston block (13) is provided at one end of the compression pipe (12) near the dust collector (1). A check mechanism (14) is provided at one end of the air intake pipe (11) near the annular air pipe (2). One end of the air intake pipe (11) is connected to the part of the compression pipe (12) located between the piston block (13) and the check mechanism (14). The other end of the air intake pipe (11) is connected to the dust collector (1). An annular heat exchange tube (4) is sleeved outside the dust collector (1) and located inside the annular gas pipe (2). The compression pipe (12) passes through the annular heat exchange tube (4). The bottom of both sides of the annular heat exchange tube (4) is provided with an inlet pipe and an outlet pipe, respectively. The drive mechanism (5) is used to drive several piston blocks (13) to reciprocate along the compression tube (12).

2. The dust suppression device for a graphitization furnace according to claim 1, characterized in that: Several of the air inlet pipes (11) are arranged tangentially along the dust collector (1), and the end of the air inlet pipe (11) near the dust collector (1) is inclined downward.

3. The dust suppression device for a graphitization furnace according to claim 1, characterized in that: The drive mechanism (5) includes a rotating sleeve (15) rotatably sleeved on the exhaust pipe (9) and an eccentric wheel (16) fixedly connected to the outer wall of the rotating sleeve (15). The eccentric wheel (16) has a groove (17) extending around it in a circumferential direction on its peripheral wall. The piston block (13) is fixedly connected to a connecting rod (18) extending into the dust collector (1) at one end near the dust collector (1). The end of the connecting rod (18) is fixedly connected to a slider (19) slidably connected in the groove (17). The slider (19) and the groove (17) are both T-shaped. The top of the rotating sleeve (15) extends out and above the dust collector (1). A worm gear (20) is fixedly connected to the top of the outer wall of the rotating sleeve (15). A worm (21) is rotatably supported on the top of the dust collector (1) through a bearing seat. A motor (22) is connected to one end of the worm (21).

4. The dust suppression device for a graphitization furnace according to claim 2, characterized in that: Each of the intake pipes (11) is provided with a valve mechanism (31) for opening and closing the interface between the intake pipe (11) and the compression pipe (12). The valve mechanism (31) includes a first plug shell (32) fixedly connected to the outer wall of the compression pipe (12) and located on the side of the intake pipe (11) near the piston block (13), a second plug shell (33) fixedly connected to the outer wall of the compression pipe (12) and located on the side of the intake pipe (11) near the check mechanism (14), a sealing plate (34) slidably inserted into the first plug shell (32), and a linkage (35) disposed between the sealing plate (34) and the piston block (13). The first plug shell (32) and the second plug shell (33) are both connected to the intake pipe (11). When the sealing plate (34) is inserted into the second plug shell (33), the intake pipe (11) is closed.

5. The dust suppression device for a graphitization furnace according to claim 4, characterized in that: The linkage (35) includes a movable shell (36) fixedly connected to the outer wall of the compression tube (12) and extending along its length, a movable groove (37) opened on the inner wall of the compression tube (12) and communicating with the interior of the movable shell (36), a connecting ring (38) fixedly connected to the side of the piston block (13) and slidably connected to the movable shell (36), and a drive rod (39) arranged along the length of the movable shell (36) and inside the movable shell (36). The connecting ring (38) is slidably sleeved on the drive rod (39). The inner wall of the connecting ring (38) and the drive rod (39) are in an interference fit. The drive rod (39) passes through the movable shell (36) and the first plug-in shell (32) and is fixedly connected to the sealing plate (34).

6. The dust suppression device for a graphitization furnace according to claim 1, characterized in that: The check valve mechanism (14) includes a support ring (23) fixedly connected inside the compression tube (12), a sealing block (24) located on the side of the support ring (23) near the piston block (13), and an elastic support member (25) disposed on the sealing block (24) and the inner wall of the compression tube (12). The inner diameter of the support ring (23) gradually decreases in the direction away from the piston block (13). The sealing block (24) is frustoconical in shape. The diameter of the sealing block (24) gradually increases in the direction away from the piston block (13) and cooperates with the inner wall of the support ring (23). The elastic support (25) includes a fixed ring (26) disposed on the side of the support ring (23) away from the piston block (13), a plurality of fixed rods (27) fixedly connected between the outer wall of the fixed ring (26) and the inner wall of the compression tube (12), a limiting post (28) slidably inserted into the fixed ring (26) and fixedly connected at one end to the sealing block (24), a limiting block (29) fixedly connected to the other end of the limiting post (28), and a return spring (30) sleeved on the limiting post (28) and abutting the limiting block (29) and the fixed ring (26) at both ends respectively.

7. The dust suppression device for a graphitization furnace according to claim 3, characterized in that: The bottom of the exhaust pipe (9) is provided with a gas collecting cylinder (40). The gas collecting cylinder (40) is flared and has several screening holes (41) around its periphery. The gas collecting cylinder (40) is provided with a fixed shaft (42) inside. A spiral blade (43) is provided between the fixed shaft (42) and the gas collecting cylinder (40).

8. The dust suppression device for a graphitization furnace according to claim 7, characterized in that: The gas collecting cylinder (40) and the exhaust pipe (9) are rotatably connected. The top of the inner wall of the gas collecting cylinder (40) is provided with an installation ring groove (44) extending around its circumference. The bottom of the outer wall of the exhaust pipe (9) is fixedly connected to a positioning ring (45) rotatably connected in the installation ring groove (44). A thrust ball bearing (46) is provided between the top of the positioning ring (45) and the top of the installation ring groove (44). A transmission mechanism (47) is provided between the eccentric wheel (16) and the gas collecting cylinder (40).

9. A dust suppression device for a graphitization furnace according to claim 8, characterized in that: The transmission mechanism (47) includes a rotating ring (48) fixedly connected to the outer wall of the gas collecting cylinder (40), a support base (49) fixedly connected to the outer wall of the exhaust pipe (9), a first rotating shaft (50) and a second rotating shaft (51) rotatably supported on the support base (49) and parallel to the exhaust pipe (9), a first bevel gear (52) fixedly connected to the bottom of the eccentric wheel (16) and coaxially arranged with its rotation axis, a second bevel gear (53) fixedly connected to the top of the first rotating shaft (50) and meshing with the first bevel gear (52), a third bevel gear (54) coaxially fixedly connected to the top end face of the rotating ring (48), a fourth bevel gear (55) fixedly connected to the bottom end of the second bevel gear (53) and meshing with the third bevel gear (54), and a speed regulating component (56) provided on the support base (49) for adjusting the transmission ratio between the first rotating shaft (50) and the second rotating shaft (51).

10. A dust suppression device for a graphitization furnace according to claim 9, characterized in that: The speed regulating component (56) includes a mounting cavity (57) opened in the support base (49), a first conical friction wheel (58) coaxially fixedly connected to the first rotating shaft (50), a second conical friction wheel (59) coaxially fixedly connected to the second rotating shaft (51), a drive screw (60) rotatably supported in the mounting cavity (57) and located between the first conical friction wheel (58) and the second conical friction wheel (59), a moving block (61) threadedly connected to the drive screw (60), and a connecting annular groove (62) opened in the moving block (61) and extending circumferentially therearound. A transmission friction wheel (63) is rotatably connected to the connecting ring groove (62) and abuts against the first conical friction wheel (58) and the second conical friction wheel (59) on both sides respectively. One end of the drive screw (60) extends out of the support seat (49) and is provided with a hexagonal block (64). A guide rod (65) parallel to the drive screw (60) is fixedly connected to the inner wall of the mounting cavity (57). The moving block (61) is slidably connected to the guide rod (65). The generatrices of the first conical friction wheel (58) and the second conical friction wheel (59) are parallel on the side that are close to each other.

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