A sintering machine flue gas deep treatment device

Abstract

This invention relates to the field of waste gas treatment technology and discloses a deep treatment device for sintering machine flue gas, including a centrifugal filtration mechanism and a variable cleaning mechanism. Its structure includes a moving ring located inside a vertical filter tank and capable of moving axially along the tank; an annular airbag installed on the inner circumference of the moving ring and capable of wrapping around the outer circumference of the filter cylinder under gas pressure; and an externally threaded rod that drives the moving ring longitudinally during rotation. This deep treatment device for sintering machine flue gas utilizes a high-speed rotating filter cylinder to filter particulate matter in the flue gas. During filtration, centrifugal force is generated in the particles, reducing the occurrence of particle blockage of the filter pores. Simultaneously, when cleaning blocked and adhered particles, the device uses the shape-changing annular airbag to squeeze and wipe the filter surface of the filter cylinder, thereby achieving rapid cleaning of particles and improving the cleaning effect and efficiency of the equipment.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, specifically to a deep treatment device for sintering machine flue gas. Background Technology

[0002] When a sintering machine is working, it produces a large amount of flue gas, which contains particulate matter that has not been completely burned. In order to reduce the pollution of particulate matter to the environment, a deep flue gas treatment device is required. This device needs to filter the particulate matter to reduce the amount of residual particulate matter discharged into the environment.

[0003] Existing deep flue gas treatment devices rely on filters to treat flowing flue gas. These filters are often horizontally arranged, with flue gas passing vertically through them. The filter pores in the filter can block excessively large particles. However, during their movement, these particles often adhere to the filter surface, severely affecting the filtration efficiency. Furthermore, some particles become trapped in the filter pores, further exacerbating the blockage. Therefore, regular cleaning of the filter is necessary. To improve the removal of blockages and adhered particles, water is often used to clean the filter. However, due to the surface tension of the liquid, some filter pores become blocked by the water flow. If the liquid is not cleaned again, it will actually affect the filtration effect (the liquid adhering to and clogging the filter will make it easier for flue gas particles to adhere to the liquid). If the liquid is cleaned again, it needs to be dried in the sun or air, resulting in a significant decrease in cleaning efficiency. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a deep treatment device for sintering machine flue gas. It utilizes a high-speed rotating filter cylinder to filter particulate matter in the flue gas. During filtration, centrifugal force is generated in the particles, reducing the likelihood of particulate matter clogging the filter pores. Simultaneously, when cleaning clogged and adhered particles, the device uses a shape-changing annular airbag to squeeze and wipe the filter surface of the filter cylinder, thereby achieving rapid cleaning of particles and improving the effectiveness and efficiency of the equipment during cleaning, thus solving the aforementioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a deep treatment device for sintering machine flue gas, comprising a fixed sleeve with a support leg installed at the bottom, and a centrifugal filtration mechanism, the structure of which includes a vertical filter kettle fixedly installed in the hole of the fixed sleeve and having a hollow internal structure, a waste gas injection channel for injecting waste gas into the vertical filter kettle, a discharge plate for discharging waste gas particles inside the vertical filter kettle, a filter cylinder installed at the axis of the vertical filter kettle and capable of filtering the flue gas, and a first pulley capable of driving the filter cylinder to rotate; and a variable cleaning mechanism, the structure of which includes a moving ring located inside the vertical filter kettle and capable of moving along the axial direction of the vertical filter kettle, an annular air bladder installed on the inner circumference of the moving ring and capable of wrapping around the outer circumference of the filter cylinder under gas pressure, and an external threaded rod capable of driving the moving ring to move longitudinally when rotating.

[0006] Preferably, the centrifugal filtration mechanism further includes a filtration chamber disposed inside a vertical filter vessel. The vertical filter vessel has a first ear cavity and a second ear cavity respectively arranged on symmetrical sides of the filtration chamber. The bottom and top of the first ear cavity are respectively provided with symmetrical rod mounting holes. The top of the second ear cavity is provided with a rod through hole. A first shaft hole communicating with the top of the filtration chamber is provided at the center of the top of the vertical filter vessel. A second shaft hole communicating with the bottom of the filtration chamber is provided at the center of the bottom of the vertical filter vessel. A waste gas injection channel communicating with the top of the filtration chamber is provided at the top of the vertical filter vessel. Multiple openings are provided at the bottom of the vertical filter vessel that, when opened... The filter cylinder has an integrated upper rotating shaft at its top, with the middle shaft of the upper rotating shaft mounted inside a first shaft hole via bearings and a sealing ring. The filter cylinder also has an integrated lower rotating shaft at its bottom, with the middle shaft of the lower rotating shaft mounted inside a second shaft hole via bearings and a sealing ring. A first pulley is fixedly fitted onto the top of the upper rotating shaft. The filter cylinder has a gas pre-reservation chamber inside, and multiple filter holes connecting the gas pre-reservation chamber and the filter chamber are provided on its circumferential surface. The lower rotating shaft has a filter exhaust port with an open bottom and a top connection to the gas pre-reservation chamber.

[0007] Preferably, the top height of the first and second ear canals is lower than the top height of the filter cylinder, and the bottom height is higher than the bottom height of the filter cylinder.

[0008] Preferably, the variable cleaning mechanism further includes an annular hole located at the center of the moving ring and open at both ends. Two symmetrical moving ears, a first moving ear and a second moving ear, are respectively provided on the outer circumference of the moving ring. An annular gas-gathering chamber is located outside the annular hole inside the moving ring. An annular airbag is installed at the intersection of the annular hole and the annular gas-gathering chamber. The first and second moving ears can move longitudinally along the first and second ear cavities, respectively. The first moving ear has a longitudinally threaded hole with open ends inside, and the second moving ear has a gas-reserved cavity communicating with the annular gas-gathering chamber inside. The middle part of the externally threaded rod is installed inside the internally threaded hole through a threaded structure. The two ends of the externally threaded rod are installed in two rod mounting holes through bearings and sealing rings. A second pulley is fixedly sleeved on the top of the externally threaded rod. A hollow air rod with an integral structure is provided at the top center of the first movable ear. The rod of the hollow air rod passes through the rod body through hole and can move along the axial direction of the rod body through hole. The interior of the hollow air rod is provided with a first air hole with an open structure at the top and a gas reserved cavity at the bottom. A second air hole connected to the first air hole is provided on the side of the rod near its top.

[0009] Preferably, the thread structure includes an internal thread structure disposed on the inner wall of the internal thread hole and an external thread structure disposed on the external thread rod body, and the internal thread structure and the external thread structure are matched.

[0010] Preferably, during operation, the first air hole is connected to the exhaust port of a gas supply device capable of generating high-pressure gas, the waste gas injection channel is connected to the exhaust port of the sintering machine, and the first and second pulleys are linked to a rotatable drive pulley via belts.

[0011] Preferably, it also includes a gas pressure control mechanism, the structure of which includes a hollow shell fixedly installed on one side of the hollow gas rod and having a hollow internal structure, a movable valve plate placed inside the hollow shell and capable of controlling the flow of gas, and a helical spring that provides elastic damping to the movable valve plate.

[0012] Preferably, the gas pressure control mechanism further includes a component movable cavity disposed inside the hollow shell. One end of the hollow shell is provided with a hollow channel integrally formed therewith. One end of the hollow channel is provided with a mounting ring integrally formed therewith and fixedly installed on the outside of the hollow gas rod body. The interior of the hollow channel is provided with a third air hole connecting one end of the component movable cavity and a second air hole. The other end of the hollow shell is provided with a fourth air hole connecting the external space and the other end of the component movable cavity. A movable valve plate capable of moving along its axial direction is placed inside the component movable cavity. A sealing gasket is embedded in the end of the movable valve plate facing the third air hole. Multiple gas flow grooves for gas flow are provided on the circumferential surface of the movable valve plate. A helical spring in a compressed state is installed at the other end of the movable valve plate.

[0013] Preferably, the structural radius of the sealing gasket is greater than the structural radius of the third air hole and less than the distance between the centerline of the gas flow groove and the moving valve plate.

[0014] Preferably, the gas resistance formed by the helical spring against the moving valve plate is consistent with the gas pressure required for the inner circumferential wall of the annular airbag to abut against the outer circumferential surface of the filter cartridge.

[0015] Compared with the prior art, the present invention provides a deep treatment device for sintering machine flue gas, which has the following beneficial effects: 1. By using a high-speed rotating filter cartridge to filter particulate matter in flue gas, the centrifugal force generated during filtration reduces the occurrence of particulate matter clogging the filter pores. At the same time, when cleaning clogged and attached particulate matter, the device uses a ring-shaped airbag that can change shape to squeeze and wipe the filter surface of the filter cartridge, thereby achieving rapid cleaning of particulate matter and improving the effectiveness and efficiency of the equipment during cleaning.

[0016] 2. Equipped with a centrifugal filtration mechanism, the core structure consists of a vertical filter tank and a high-speed rotating filter cartridge. The filter cartridge is stably mounted on the tank shaft via upper and lower rotating shafts. Combined with the layout of the top exhaust gas injection channel, bottom discharge plate, and central exhaust port, the high-speed rotation during operation generates centrifugal force, which allows particulate matter in the flue gas to be thrown off the surface of the filter cartridge and the filter holes during the filtration process. This reduces the risk of particulate matter adhesion and pore blockage from the source. At the same time, the flue gas flow path is smooth, and particulate matter can be discharged centrally through the bottom discharge plate. This not only improves filtration efficiency and stability but also facilitates dust cleaning and emission. The structure is compact and the operation is reliable.

[0017] 3. Equipped with a variable cleaning mechanism, the core structure consists of an axially movable moving ring, an inner annular airbag, and a drive external threaded rod. High-pressure gas causes the annular airbag to expand and tightly wrap around the outer wall of the filter cartridge. The rotation of the external threaded rod then drives the moving ring to reciprocate longitudinally along the filter cartridge, achieving a squeezing-type wiping cleaning of the filter cartridge surface. No water washing is required, and there is no liquid residue. Combined with the air supply structure of the hollow air rod and the annular air-gathering chamber, the expansion and contraction of the airbag are controllable, and the wiping force is uniform. It can thoroughly remove attached and clogging particles, with high cleaning efficiency and good effect. Moreover, the structure has strong linkage and can be coordinated with the filtration process to achieve efficient online cleaning. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the present invention; Figure 3 This is a perspective view of the centrifugal filtration mechanism in this invention; Figure 4 This is a three-dimensional cross-sectional view of the centrifugal filtration mechanism in this invention; Figure 5 This is a perspective view of the variable cleaning mechanism in this invention; Figure 6 This is a perspective cross-sectional view of the variable cleaning mechanism in this invention; Figure 7 This is a perspective view of the gas pressure control mechanism in this invention; Figure 8 This is a three-dimensional cross-sectional view of the gas pressure control mechanism in this invention.

[0019] The components include: 1. Fixed sleeve; 2. Support leg; 3. Centrifugal filtration mechanism; 31. Vertical filter vessel; 32. Filtration chamber; 33. No. 1 ear cavity; 34. No. 1 shaft hole; 35. No. 2 shaft hole; 36. Discharge plate; 37. Rod mounting hole; 38. Rod through hole; 39. No. 2 ear cavity; 310. Filter cylinder; 311. Gas reserved cavity; 312. Filter hole; 313. Lower rotating shaft; 314. Filter exhaust hole; 315. Upper rotating shaft; 316. No. 1 pulley; 317. Waste gas injection channel; 4. Variable cleaning mechanism; 41. Moving ring; 42. 43. Annular gas-gathering chamber; 44. Annular air bladder; 45. Moving ear No. 1; 46. Moving ear No. 2; 47. Internal threaded hole; 48. Gas reserved cavity; 49. External threaded rod; 410. Hollow air rod; 411. Pulley No. 2; 412. Air hole No. 1; 413. Air hole No. 2; 5. Gas pressure control mechanism; 51. Hollow shell; 52. Component moving cavity; 53. Hollow channel; 54. Mounting ring; 55. Air hole No. 3; 56. Air hole No. 4; 57. Moving valve plate; 58. Sealing gasket; 59. Gas flow groove; 510. Helical spring. Detailed Implementation

[0020] 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.

[0021] Please see Figure 1 and Figure 2 A deep treatment device for sintering machine flue gas includes a fixed sleeve 1 with a support leg 2 installed at the bottom. Before operation, the first air hole 412 is connected to the exhaust port of a gas supply device that can generate high-pressure gas. Then, the waste gas injection channel 317 is connected to the exhaust port of the sintering machine. Finally, the first pulley 316 and the second pulley 411 are linked to a rotatable drive pulley via a belt.

[0022] To achieve centrifugal filtration of flue gas, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 and Figure 4 A centrifugal filtration mechanism 3 needs to be set up. Its structure includes a vertical filter vessel 31 with a hollow internal structure, which is fixedly installed in the hole of the fixed sleeve 1; a waste gas injection channel 317 for injecting waste gas into the vertical filter vessel 31; a discharge plate 36 for discharging waste gas particles inside the vertical filter vessel 31; a filter cylinder 310 installed at the axis of the vertical filter vessel 31 and capable of filtering flue gas; and a first belt pulley 316 capable of driving the filter cylinder 310 to rotate. The flue gas generated by the sintering machine is stably sent into the filter chamber 32 inside the vertical filter vessel through the waste gas injection channel 317. The flue gas diffuses evenly in the chamber and passes through the filter holes 312 on the surface of the central filter cylinder 310. During this process, larger solid particles in the flue gas are effectively intercepted and retained in the filter chamber 32. The purified gas passes smoothly through the filter holes 312, enters the gas reserved cavity 311 inside the filter cylinder, and is then discharged outward through the filter exhaust hole 314, completing the flue gas purification process. During continuous filtration, the No. 1 pulley 316 continuously drives the filter cylinder 310 to rotate at high speed, so that the particles attached to the outer circumference of the filter cylinder 310 and the particles blocked inside the filter holes 312 are subjected to stable centrifugal force and are quickly thrown off the surface and channels of the filter cylinder, thus alleviating the blockage problem at the source. When the particles accumulated in the filter chamber 32 reach a certain amount and need to be discharged, the bottom discharge plate 36 is opened, and the particles settle downwards and are discharged under their own gravity. After the dust removal is completed, the discharge plate 36 is closed, and normal filtration operation can be resumed, ensuring continuous and stable operation of the equipment.

[0023] For details regarding the specific structure of the centrifugal filtration mechanism 3, please refer to [link / reference]. Figure 3 and Figure 4 The mechanism uses a vertical filter vessel 31 as its main carrier. Inside the vessel is a core space for temporary storage and filtration of flue gas—a filter chamber 32. On the symmetrical sides of the filter chamber 32, there are two ear chambers, No. 1 33 and No. 2 39, providing installation and movement space for the supporting cleaning mechanism. The No. 1 ear chamber 33 has symmetrical rod mounting holes 37 at its upper and lower ends for stable installation of the drive rods. The No. 2 ear chamber 39 has a rod through hole 38 at its top for the passage and movement guidance of the ventilation rods. The vertical filter vessel 31 has a No. 1 shaft hole 34 at its top center and a No. 2 shaft hole 35 at its bottom center, both of which are connected to the filter chamber 32, forming a coaxial mounting reference for the filter cylinder 310. A waste gas injection channel 317 is provided at the top of the vessel, which can smoothly guide the sintering machine flue gas into the top of the filter chamber 32. Multiple sets of discharge plates 36 are arranged at the bottom of the vessel. When opened, they can rely on gravity to concentrate and discharge the filtered particles, facilitating the cleaning of accumulated ash. The filter cartridge 310 adopts an integrated rotating shaft structure, with an upper rotating shaft 315 at the top and a lower rotating shaft 313 at the bottom. The upper rotating shaft 315 is sealed and assembled in the first shaft hole 34 by bearings and sealing rings, and the lower rotating shaft 313 is installed in the second shaft hole 35 with the same sealing method, which ensures both rotational flexibility and chamber sealing to prevent leakage. A first pulley 316 is fixedly installed at the top of the upper rotating shaft 315 for external power input to drive the filter cartridge 310 to rotate at high speed. The filter cartridge 310 has a gas pre-reservation chamber 311 inside, and multiple sets of filter holes 312 are evenly distributed around the circumference of the cylinder body to realize the connection between the filter chamber 32 and the gas pre-reservation chamber 311, so as to complete the filtration and separation of flue gas. The lower rotating shaft 313 has a filter exhaust hole 314 with an opening at the bottom and a connection at the top to the gas pre-reservation chamber 311, which is used to discharge the purified gas in a directional manner. In addition, the No. 1 ear canal 33 and the No. 2 ear canal 39 adopt a highly compatible design, with the top lower than the top of the filter cartridge 310 and the bottom higher than the bottom of the filter cartridge 310, ensuring that the supporting mechanism can fully cover the surface of the filter cartridge and achieve effective cleaning of the entire section.

[0024] To achieve a wiping action on the outer circumferential surface of the filter cartridge 310, thereby improving dust cleaning efficiency and effectiveness, please refer to... Figure 1 , Figure 2 , Figure 5 and Figure 6A variable cleaning mechanism 4 needs to be set up. Its structure includes a moving ring 41 located inside the vertical filter tank 31 and capable of moving along the axial direction of the vertical filter tank 31, an annular airbag 44 installed on the inner circumference of the moving ring 41 and capable of wrapping around the outer circumference of the filter cylinder 310 under gas pressure, and an external threaded rod 49 that can drive the moving ring 41 to move longitudinally when rotating. When it is necessary to clean the particles attached to the surface of the filter cylinder, the external air supply equipment is first started. High-pressure gas is smoothly delivered and converged into the annular gas gathering chamber 43 inside the moving ring 41 through the first air hole 412 inside the hollow air rod 410 and the gas reserved chamber 48 inside the second moving ear 46. As the air pressure in the chamber gradually increases, the annular airbag 44 expands directionally towards the center under the action of uniform air pressure until its inner circumference tightly fits and wraps around the outer circumference of the filter cylinder 310, forming a stable wiping contact state. Subsequently, the drive unit is activated, causing the second pulley 411 to rotate, which in turn drives the external threaded rod 49 to rotate in a fixed direction. Under the action of threaded meshing transmission, the moving ring 41, which cooperates with the external threaded rod 49, moves smoothly downward along the axial direction of the vertical filter vessel. During the movement, the tightly fitted annular airbag 44 continuously and evenly squeezes and wipes the outer wall of the filter cylinder 310, completely peeling off the particles attached to the surface and embedded in the filter holes. The cleaned particles settle downward under the action of gravity. After the moving ring 41 reaches the lowest point of its stroke, the second pulley 411 is controlled to rotate in the opposite direction, causing the external threaded rod 49 to drive the moving ring 41 to return to its original position, completing one complete wiping and cleaning cycle. Through this mechanical dry cleaning method, particles can be removed efficiently and thoroughly, significantly improving the dust removal effect and work efficiency.

[0025] For details regarding the specific structure of the variable cleaning mechanism 4, please refer to [link / reference]. Figure 5 and Figure 6The mechanism uses a movable ring 41 as its core carrier. A central annular hole 42, with both ends through it, is provided for fitting onto the outside of the filter cylinder and allowing for movement. Two movable ears 46 are symmetrically arranged on the outer circumference of the movable ring 41, allowing for stable longitudinal linear movement along the first ear cavity 33 and the second ear cavity 39 of the vertical filter vessel, respectively, achieving overall guidance and positioning. Inside the movable ring 41, an annular gas-gathering chamber 43 is located around the annular hole 42. An annular air bladder 44 is installed at the junction of the annular hole 42 and the annular gas-gathering chamber 43. The air bladder can be expanded and contracted by air pressure control, thus adhering to or detaching from the outer wall of the filter cylinder. The first movable ear 45 has a longitudinally penetrating internal threaded hole 47 for threaded engagement with the external threaded rod 49. The second movable ear 46 has a gas-reserved chamber 48, which can smoothly deliver high-pressure gas to the annular gas-gathering chamber 43, providing uniform air pressure to the annular air bladder 44. The middle part of the external threaded rod 49 engages with the internal threaded hole 47 through a matching internal and external thread structure. Its two ends are sealed in the rod mounting hole 37 of the vertical filter vessel by bearings and sealing rings, ensuring smooth rotation and reliable sealing. The top of the external threaded rod 49 is fixedly equipped with a second pulley 411 for connecting to external power to achieve forward and reverse drive. The top center of the second movable ear 46 has a hollow air rod 410 integrally formed. The air rod passes through the rod through hole 38 of the vertical filter vessel and can move axially synchronously with the movable ring. The interior has a first air hole 412 with an opening at the top and a gas reserved cavity 48 at the bottom. Near the top, there is also a second air hole 413 communicating with the first air hole 412 for connecting to a high-pressure gas source and realizing gas pressure regulation. In actual operation, the No. 1 air hole 412 is connected to the external high-pressure air supply equipment, the exhaust gas injection channel 317 is connected to the sintering machine exhaust port, and the No. 1 pulley 316 and the No. 2 pulley 411 are driven synchronously by the belt to realize the coordinated operation of filtration and cleaning.

[0026] To prevent damage to the annular airbag 44 due to air pressure overload, please refer to... Figure 1 , Figure 2 , Figure 7 and Figure 8A gas pressure control mechanism 5 needs to be set up. Its structure includes a hollow shell 51 fixedly installed on one side of the hollow gas cylinder 410 and having a hollow internal structure; a movable valve plate 57 placed inside the hollow shell 51 and capable of controlling gas flow; and a helical spring 510 that provides elastic damping to the movable valve plate 57. High-pressure gas entering the first gas port 412 will simultaneously flow to the gas pressure control mechanism through the second gas port 413, forming a continuous axial thrust on the movable valve plate 57. When the gas thrust exceeds the preset elastic clamping force of the helical spring 510... The movable valve plate 57 will move directionally along the component's movable cavity 52, opening the pressure relief channel. Excess high-pressure gas will then pass through the second air hole 413, the third air hole 55, the movement gap between the movable valve plate 57 and the housing, the gas flow groove 59, and the component's movable cavity 52 in sequence, and finally be smoothly discharged to the outside through the fourth air hole 56, realizing automatic overpressure relief of the system. After the operator observes the pressure relief state, he / she must immediately shut off the external air supply equipment to avoid the continuous high air pressure in the cavity causing the annular air bag 44 to over-inflate and rupture, effectively ensuring the safe operation and service life of the cleaning mechanism.

[0027] For details regarding the specific structure of the gas pressure control mechanism 5, please refer to [link / reference]. Figure 7 and Figure 8 The mechanism uses a hollow shell 51 as the mounting base. Inside the shell, a component movable cavity 52 is provided for the movement of the valve plate, offering a stable movement space and a sealed environment for the internal components. One end of the hollow shell 51 has an integrally formed hollow channel 53. The end of the hollow channel 53 is securely fitted onto the outside of the hollow air rod 410 via an integral mounting ring 54, achieving stable docking and gas communication with the variable cleaning mechanism. The hollow channel 53 has a third air hole 55 inside, used to precisely connect the component movable cavity 52 with the second air hole 413 on the hollow air rod 410, ensuring stable high-pressure gas delivery. The other end of the hollow shell 51 has a fourth air hole 56, directly connecting the component movable cavity 52 to the outside atmosphere, serving as a pressure relief outlet under overpressure conditions. The movable chamber 52 of the component is equipped with a movable valve plate 57 that can slide freely along the axial direction. A sealing gasket 58 is embedded at one end of the movable valve plate 57 facing the third air hole 55, ensuring a reliable seal against the third air hole 55 under normal pressure and preventing gas leakage. Multiple gas flow grooves 59 are machined on the circumferential surface of the movable valve plate 57 to guide gas smoothly through during pressure relief. A pre-compressed helical spring 510 is installed at the other end of the movable valve plate 57, providing a constant elastic clamping force to the valve plate and forming a controllable air pressure threshold. The radius of the sealing gasket 58 is designed to be larger than the diameter of the third air hole 55 and smaller than the distance from the gas flow groove 59 to the axis of the movable valve plate 57, ensuring effective sealing and normal opening of the pressure relief channel. Simultaneously, the resistance threshold formed by the helical spring 510 against the movable valve plate 57 precisely matches the working air pressure required for the annular airbag 44 to tightly fit against the outer wall of the filter cartridge 310, ensuring automatic pressure relief once the working pressure is reached, achieving safety protection.

[0028] In use, firstly, the first air hole 412 is connected to the exhaust port of a gas supply device capable of generating high-pressure gas. Then, the exhaust gas injection channel 317 is connected to the exhaust port of the sintering machine. Finally, the first pulley 316 and the second pulley 411 are linked to a rotating drive pulley via belts. The flue gas enters the filter chamber 32 through the exhaust gas injection channel 317 and then passes through the filter holes 312 of the filter cylinder 310. At this point, larger particles are blocked inside the filter chamber 32, while the gas is discharged outwards along the filter holes 312, the gas pre-reserved cavity 311, and the filter exhaust hole 314. During filtration, the first pulley 316 drives the filter cylinder 310 to rotate rapidly. At this time, particles attached to the outer circumference of the filter cylinder 310 and blocked in the filter holes 312 generate centrifugal force, which forces the particles to be thrown away, thus effectively removing blocked and attached particles. For effective cleaning, when particulate matter needs to be removed, the air supply equipment is activated, allowing gas to enter the annular gas-gathering chamber 43 through the first air hole 412 and the gas reserved chamber 48. Under gas pressure, the annular air bladder 44 expands inward until its inner circumference contacts the outer circumference of the filter cylinder 310. Then, the second pulley 411 is activated, and the external threaded rod 49 rotates in a directional manner. Due to the threaded connection, the moving ring 41 moves downward. During this movement, the contacting annular air bladder 44 wipes away the dust adhering to the outer circumference of the filter cylinder 310, causing it to fall downward until the moving ring 41 reaches its lowest point. Then, the second pulley 411 rotates in the opposite direction until the moving ring 41 returns to its original position, thus wiping away the particulate matter adhering to the outer circumference of the filter cylinder 310. When particulate matter needs to be discharged, the discharge plate 36 is opened, and the particulate matter falls downward under gravity. Then, the discharge plate 36 is closed.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A deep treatment device for sintering machine flue gas, comprising a fixing sleeve (1) with a support leg (2) installed at the bottom, characterized in that: It also includes, The centrifugal filtration mechanism (3) includes a vertical filter vessel (31) that is fixedly installed in the hole of the fixed sleeve (1) and has a hollow internal structure, a waste gas injection channel (317) for injecting waste gas into the vertical filter vessel (31), a discharge plate (36) for discharging waste gas particles inside the vertical filter vessel (31), a filter cylinder (310) installed at the axis of the vertical filter vessel (31) and capable of filtering flue gas, and a first pulley (316) capable of driving the filter cylinder (310) to rotate. And a variable cleaning mechanism (4), the structure of which includes a moving ring (41) located inside the vertical filter vessel (31) and capable of moving along the axial direction of the vertical filter vessel (31), an annular airbag (44) installed on the inner circumference of the moving ring (41) and capable of wrapping around the outer circumference of the filter cylinder (310) under gas pressure, and an external threaded rod (49) capable of driving the moving ring (41) to move longitudinally when rotating.

2. The deep treatment device for sintering machine flue gas according to claim 1, characterized in that: The centrifugal filtration mechanism (3) further includes a filtration chamber (32) disposed inside a vertical filter vessel (31). The vertical filter vessel (31) has a first ear cavity (33) and a second ear cavity (39) respectively disposed on the symmetrical sides of the filtration chamber (32). The first ear cavity (33) has a symmetrical rod mounting hole (37) at its bottom and top respectively. The second ear cavity (39) has a rod through hole (38) at its top. The top center of the vertical filter vessel (31) has a first shaft hole (34) connecting to the top of the filtration chamber (32). The bottom center of the vertical filter vessel (31) has a second shaft hole (35) connecting to the bottom of the filtration chamber (32). The top of the vertical filter vessel (31) has a waste gas injection channel (317) connecting to the top of the filtration chamber (32). The bottom of the vertical filter vessel (31) has multiple discharge ports that can discharge particulate matter after opening. The filter cylinder (310) has an upper rotating shaft (315) integrated with it at the top. The middle shaft of the upper rotating shaft (315) is installed inside the first shaft hole (34) through bearings and sealing rings. The filter cylinder (310) has a lower rotating shaft (313) integrated with it at the bottom. The middle shaft of the lower rotating shaft (313) is installed inside the second shaft hole (35) through bearings and sealing rings. The top of the upper rotating shaft (315) is fixedly fitted with a first pulley (316). The filter cylinder (310) has a gas reserved cavity (311) inside. The circumferential surface of the filter cylinder (310) has multiple filter holes (312) that connect the gas reserved cavity (311) and the filter chamber (32). The lower rotating shaft (313) has a filter exhaust hole (314) with an open structure at the bottom and connected to the gas reserved cavity (311) at the top.

3. The deep treatment device for sintering machine flue gas according to claim 2, characterized in that: The top height of the first ear cavity (33) and the second ear cavity (39) is lower than the top height of the filter tube (310), and the bottom height is higher than the bottom height of the filter tube (310).

4. The deep treatment device for sintering machine flue gas according to claim 3, characterized in that: The variable cleaning mechanism (4) further includes an annular hole (42) located at the center of the moving ring (41) and open at both ends. The outer circumference of the moving ring (41) is provided with two symmetrical first moving ears (45) and second moving ears (46). The moving ring (41) has an annular gas-gathering cavity (43) located around the annular hole (42). An annular airbag (44) is installed at the intersection of the annular hole (42) and the annular gas-gathering cavity (43). The first moving ear (45) and the second moving ear (46) can move longitudinally along the first ear cavity (33) and the second ear cavity (39), respectively. The first moving ear (45) has a longitudinally threaded internal hole (47) with open at both ends. The second moving ear (46) has a gas-reserved cavity connecting to the annular gas-gathering cavity (43). 48), the middle part of the external thread rod (49) is installed inside the internal thread hole (47) through a threaded structure. The two ends of the external thread rod (49) are installed in the two rod mounting holes (37) through bearings and sealing rings. The top end of the external thread rod (49) is fixedly fitted with a second pulley (411). The top center of the first movable ear (46) is provided with a hollow air rod (410) with an integral structure. The rod of the hollow air rod (410) passes through the rod through hole (38) and can move axially along the rod through hole (38). The interior of the hollow air rod (410) is provided with a first air hole (412) with an open structure at the top and connected to the gas reserved cavity (48) at the bottom. The hollow air rod (410) is provided with a second air hole (413) connected to the first air hole (412) on the side of the rod near its top.

5. The deep treatment device for sintering machine flue gas according to claim 4, characterized in that: The threaded structure includes an internal thread structure located on the inner wall of the internal threaded hole (47) and an external thread structure located on the body of the external threaded rod (49), and the internal thread structure matches the external thread structure.

6. The deep treatment device for sintering machine flue gas according to claim 5, characterized in that: During operation, the first air hole (412) is connected to the exhaust port of a gas supply device that can generate high-pressure gas, the exhaust gas injection channel (317) is connected to the exhaust port of the sintering machine, and the first pulley (316) and the second pulley (411) are linked to a rotatable drive pulley via belts.

7. The deep treatment device for sintering machine flue gas according to claim 6, characterized in that: It also includes a gas pressure control mechanism (5), the structure of which includes a hollow shell (51) fixedly installed on one side of the hollow gas rod (410) and having a hollow internal structure, a movable valve plate (57) placed inside the hollow shell (51) and capable of controlling the flow of gas, and a helical spring (510) that produces an elastic damping effect on the movable valve plate (57).

8. The deep treatment device for sintering machine flue gas according to claim 7, characterized in that: The gas pressure control mechanism (5) further includes a component movable cavity (52) disposed inside the hollow shell (51). One end of the hollow shell (51) is provided with a hollow channel (53) integrally formed therewith. One end of the hollow channel (53) is provided with an installation ring (54) integrally formed therewith and fixedly installed on the outside of the hollow gas rod (410). The interior of the hollow channel (53) is provided with a third air hole (55) connecting one end of the component movable cavity (52) and the second air hole (413). The hollow shell (51) 1) The other end is provided with a fourth air hole (56) connecting the external space and the other end of the component movable cavity (52). The movable cavity (52) is equipped with a movable valve plate (57) that can move along its axial direction. The movable valve plate (57) has a sealing gasket (58) embedded at the end facing the third air hole (55). The circumferential surface of the movable valve plate (57) is provided with a plurality of gas flow grooves (59) for gas flow. The other end of the movable valve plate (57) is equipped with a helical spring (510) in a compressed state.

9. The deep treatment device for sintering machine flue gas according to claim 8, characterized in that: The structural radius of the sealing gasket (58) is greater than the structural radius of the third air hole (55) and less than the distance between the center lines of the gas flow groove (59) and the moving valve plate (57).

10. The deep treatment device for sintering machine flue gas according to claim 9, characterized in that: The gas resistance formed by the helical spring (510) against the moving valve plate (57) is consistent with the gas pressure required for the inner circumferential wall of the annular airbag (44) to abut against the outer circumferential surface of the filter cartridge (310).

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