A kind of pellet ring cooling machine high temperature section flue gas extraction and mixing device

Abstract

The application relates to the technical field of pellet ring coolers, and discloses a flue gas leading-out and mixing device for a high-temperature section of a pellet ring cooler, which comprises a filter cylinder, a tooth ring and a motor. The frame of the filter cylinder is fixed on a gas collecting cover through bolt threads. The tooth ring is fixedly connected with the frame of the filter cylinder, and is arranged in the filter cylinder. The motor is fixedly connected with the frame of the filter cylinder. The output end of the motor is fixedly connected with a support through a shaft coupling. The support is fixedly connected with a concave frame. The application can filter the impurities generated in the flue gas. The impurities adsorbed on the surface of the filter cylinder and blocked in the filter holes are removed through rolling ejection, knocking, airflow blowing and sweeping. The filter cylinder can realize multiple self-cleaning, continuously guarantee the cleanliness of the filter cylinder and the smooth entry of the flue gas, effectively improve the long-term filtering effect of the filter cylinder on the impurities in the flue gas, and avoid the blockage of the filter holes due to the accumulation of the impurities, so that the normal introduction of the flue gas is hindered.

Description

Technical Field

[0001] This invention belongs to the field of pellet ring cooler technology, specifically, it relates to a device for drawing out and mixing flue gas in the high-temperature section of a pellet ring cooler. Background Technology

[0002] The pellet ring cooler is a core supporting metallurgical equipment in the production line of chain grate machine, rotary kiln, and ring cooler oxidized pellets. It is specially designed to cool the 1100-1200℃ high-temperature oxidized pellets discharged from the rotary kiln, and at the same time recover the waste heat of the pellets for recycling in the production line. It is an indispensable integrated cooling and waste heat recovery machine in the ironmaking pelleting process.

[0003] The ring cooler uses multi-stage zoned air blowing to generate flue gas at different temperatures, all of which is recycled. The first stage of high-temperature flue gas is sent to the rotary kiln as secondary combustion air to reduce pulverized coal consumption; the second stage of medium-temperature flue gas is supplied to the chain grate machine to preheat green pellets; and the third stage of low-temperature flue gas is used for green pellet drying. During operation, the high-temperature flue gas is collected by a high-temperature gas collection hood and then sent to a vertical cyclone mixer. The vertical cyclone mixer introduces medium-temperature flue gas or cold air through pipelines to mix with the high-temperature flue gas, balancing the flue gas temperature. The comprehensive waste heat recovery rate can reach over 75%, significantly reducing the fuel energy consumption of the entire production line.

[0004] However, when the pellets are cooled on the annular cooler, the flue gas produced contains a large number of impurities, which causes ash to accumulate inside the gas collection hood, resulting in blockage of the internal gas intake branch pipe. At the same time, after the impurities enter the vertical cyclone mixer, they can easily cause the internal baffles and cyclone blades to be eroded more quickly.

[0005] To address the problems caused by the aforementioned impurities, existing technologies employ structures such as filters within the gas collection hood to intercept impurities carried in the flue gas. However, after being intercepted by the filters, the impurities are adsorbed and accumulate on the filter surface, causing the impurities to clog the filter pores, hindering the flow of flue gas, and making it impossible to filter impurities in the flue gas for an extended period, thus affecting the amount of flue gas introduced and the filtration effect of impurities. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows: a high-temperature section flue gas extraction and mixing device for a pellet annular cooler, comprising: an annular cooler body, which is used to cool the pellets discharged from the external rotary kiln, wherein the annular cooler body produces flue gas in three sections: high, medium and low temperature; a gas collecting hood, which is installed on the annular cooler body and is used to collect the high-temperature section flue gas of the annular cooler; a vertical cyclone mixer, which is installed on the gas collecting hood and is used to mix the high-temperature flue gas and the medium-temperature flue gas to equalize the flue gas temperature; and a filter assembly, which is installed inside the gas collecting hood and can preferentially filter impurities in the flue gas, then roll out the impurities blocking the filter holes and generate vibration by knocking, shake up the adsorbed impurities and blow them away by airflow, so as to continuously ensure the flow and filtration of flue gas.

[0007] In a preferred embodiment of the present invention, the impurity filtering assembly includes: a filter cartridge, which is composed of a frame and a filter screen, wherein the frame of the filter cartridge is bolted and threaded onto the gas collection hood; a toothed ring, which is fixedly connected to the frame of the filter cartridge and is located inside the filter cartridge; a motor, which is fixedly connected to the frame of the filter cartridge, wherein the output end of the motor is fixedly connected to a bracket via a coupling, and a concave frame is fixedly connected to the bracket; a needle seat, which is rotatably mounted on the concave frame via a bearing, wherein the needle seat is composed of a round rod and a plurality of small conical needle rods, the position and size of the conical needle rods being adapted to the position and size of the filter holes of the filter cartridge; a first gear, which is fixedly connected to the needle seat; a second gear, which is rotatably mounted on the concave frame via a bearing, wherein the second gear meshes with the toothed ring; and a chain, which is sleeved on the first gear and the second gear, wherein the chain meshes with the first gear and the second gear respectively.

[0008] In a preferred embodiment of the present invention, a rubber sleeve is provided on the needle holder, wherein the rubber sleeve encloses a plurality of small conical needle shafts on the needle holder.

[0009] In a preferred embodiment of the present invention, the filter assembly further includes: a corrugated ring fixedly connected to the frame of the filter cartridge, wherein the corrugated ring is placed inside the filter cartridge; a cylinder fixedly connected to a concave frame, wherein a spring is provided inside the cylinder; a ball-head rod slidably mounted on the cylinder, wherein one end of the spring is fixedly connected to the ball-head rod, and the ball-head rod corresponds to the position of the corrugated ring; and a striking rod fixedly connected to the ball-head rod, wherein the striking rod consists of a round rod and a plurality of uniformly arranged rubber columns.

[0010] In a preferred embodiment of the present invention, the filter assembly further includes: an air cylinder, which is fixedly connected to a concave frame; a piston rod, which is slidably mounted on the air cylinder, wherein the piston rod is composed of a round rod and a piston plate, and the round end of the piston rod is fixedly connected to a striking rod; and a perforated cover, which is fixedly connected to the concave frame, wherein the perforated cover is connected to the air cylinder via an air pipe, and the surface of the perforated cover is close to the filter cartridge.

[0011] In a preferred embodiment of the present invention, the filter assembly further includes: a rod, which is fixedly connected to the support, wherein the rod passes through the filter cartridge and rotates in a hole opened on the filter cartridge; and a cleaning brush, which is threadedly mounted on the rod by bolts, wherein the cleaning brush is in contact with the surface of the filter cartridge.

[0012] In a preferred embodiment of the present invention, a sealing ring is fixedly connected to the inner wall of the filter cartridge, wherein the sealing ring is sleeved on the rod.

[0013] In a preferred embodiment of the present invention, a rubber plate is fixedly attached to the cleaning brush, wherein the rubber plate is in contact with the surface of the filter cartridge and is located in the middle of the cleaning brush.

[0014] In a preferred embodiment of the present invention, a conical cover is fixed to the rod by a round rod, wherein the tip of the conical cover faces away from the filter cartridge.

[0015] In a preferred embodiment of the present invention, a ring rail is fixedly connected to the support, and a support rod is fixedly connected to the frame of the filter cartridge, wherein the end of the support rod near the support is arc-shaped and placed inside the ring rail.

[0016] Compared with the prior art, the present invention has the following advantages: This invention, by setting up a filter assembly, can filter impurities generated in flue gas. Then, through rolling, knocking, airflow blowing, and sweeping, the impurities adsorbed on the surface of the filter cartridge and those clogging the filter holes are removed, enabling the filter cartridge to achieve multiple self-cleaning processes. This ensures the filter cartridge remains clean and allows for the smooth entry of flue gas, effectively improving the long-term filtering effect of the filter cartridge on flue gas impurities and preventing the filter holes from being blocked by the accumulation of impurities, thus avoiding the normal introduction of flue gas.

[0017] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0018] In the attached diagram: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 For this purpose Figure 1 A schematic diagram of a partial three-dimensional structure; Figure 3 This is a partial cross-sectional view of the filter cartridge of the present invention; Figure 4 This is a three-dimensional structural diagram of the wave ring in this invention; Figure 5 This is a three-dimensional structural diagram of the cleaning brush in this invention; Figure 6 This is a partial cross-sectional view of the conical cover in this invention; Figure 7 This is a partial cross-sectional view of the air cylinder in this invention; Figure 8 For the present invention Figure 7 A magnified view of a portion of the image; Figure 9 This is a three-dimensional structural diagram of the perforated cover of the present invention.

[0019] In the diagram: 1. Circular cooler body; 2. Gas collection hood; 3. Vertical cyclone mixer; 4. Filter assembly; 41. Filter cartridge; 42. Wave ring; 43. Gear ring; 44. Sealing ring; 45. Motor; 46. Bracket; 47. Ring rail; 48. Support rod; 49. Rod; 410. Cleaning brush; 411. Rubber plate; 412. Conical cover; 413. Concave frame; 414. Needle seat; 415. First gear; 416. Second gear; 417. Chain; 418. Rubber sleeve; 419. Cylinder; 420. Ball head rod; 421. Spring; 422. Striking rod; 423. Perforated cover; 424. Air cylinder; 425. Piston rod; 426. Air pipe. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0021] Reference Figure 1 , Figure 2 and Figure 3 As shown, this embodiment discloses a high-temperature section flue gas extraction and mixing device for a pellet annular cooler, comprising: an annular cooler body 1, used to cool the pellets discharged from the external rotary kiln, wherein the annular cooler body 1 produces flue gas in three sections: high, medium and low temperature; a gas collecting hood 2, which is installed on the annular cooler body 1 and used to collect the high-temperature section flue gas; a vertical swirl mixer 3, which is installed on the gas collecting hood 2 and used to mix the high-temperature flue gas and the medium-temperature flue gas to balance the flue gas temperature; and a filter assembly 4, which is installed inside the gas collecting hood 2 and can preferentially filter impurities in the flue gas, then roll out the impurities blocking the filter holes and generate vibration by knocking, shake up the adsorbed impurities and blow them away by airflow, so as to continuously ensure the flow and filtration of flue gas.

[0022] Reference Figure 4-8As shown, this embodiment discloses a filter assembly 4 comprising: a filter cartridge 41, which is composed of a frame and a filter screen, wherein the frame of the filter cartridge 41 is bolted to the gas collection hood 2; a toothed ring 43, which is fixedly connected to the frame of the filter cartridge 41 and is located inside the filter cartridge 41; a motor 45, which is fixedly connected to the frame of the filter cartridge 41, wherein the output end of the motor 45 is fixedly connected to a bracket 46 via a coupling, and a concave frame 413 is fixedly connected to the bracket 46; and a needle holder 414, which is rotatably mounted on the concave frame 413 via bearings, wherein the needle holder 414 consists of a round rod and multiple small cones. The system comprises tapered needle rods, the position and size of which are adapted to the position and size of the filter holes in the filter cartridge 41; a first gear 415, which is fixedly connected to the needle holder 414; a second gear 416, which is rotatably mounted on the concave frame 413 via bearings, and meshes with the gear ring 43; and a chain 417, which is sleeved on the first gear 415 and the second gear 416, and meshes with both gears 415 and 416 respectively. By providing the needle holder 414, multiple tapered needle rods can be used during the rotation of the needle holder 414. The filter cartridge 41 is inserted into the filter holes to push out the impurities that are clogging the filter holes, preventing impurities from clogging the filter holes inside the filter cartridge 41 and affecting the normal introduction and filtration of flue gas. In use, the frame of the filter cartridge 41 is first installed on the gas collecting hood 2 with bolts and threads, so that the filter cartridge 41 is placed inside the gas collecting hood 2. When the annular cooler 1 cools the pellets, the high-temperature flue gas generated by the pellets enters the gas collecting hood 2 and is filtered by the filter cartridge 41. At this time, the motor 45 is started to drive the bracket 46 to rotate. The bracket 46 drives the concave frame 413 to rotate. The concave frame 413 drives the needle seat 414 to rotate around the circumference of the filter cartridge 41. The concave frame 413 drives the first gear 415 and the second gear 416 to move. Under the action of the second gear 416 meshing with the gear ring 43, the second gear 416 rotates during the movement. The second gear 416 drives the first gear 415 to rotate through the chain 417. The first gear 415 drives the needle seat 414 to rotate, so that the needle seat 414 rotates in a circle on the filter screen surface that is in contact with the filter cylinder 41 while rotating on its own axis. During the rotation, multiple small conical needle rods are inserted into the filter holes of the filter cylinder 41 in sequence, pushing out the impurities blocking the filter holes and completing the cleaning of the impurities blocking the filter holes.

[0023] Reference Figure 8As shown, this embodiment discloses a rubber sleeve 418 fitted on the needle holder 414. The rubber sleeve 418 encloses a plurality of small conical needle rods on the needle holder 414. By setting the rubber sleeve 418, when the small conical needle rods on the needle holder 414 are inserted into the filter hole of the filter cartridge 41, the rubber sleeve 418 is deformed and contracted by the pressure of the filter screen. When the small conical needle rods leave the filter hole, the filter screen separates from the rubber sleeve 418. The rubber sleeve 418 elastically recovers and adheres to the surface of the small conical needle rods, pushing off the impurities adhering to their surfaces, cleaning the residual impurities on the needle holder 414, and ensuring the cleanliness of the small conical needle rods.

[0024] Reference Figure 4-8 As shown, this embodiment discloses that the filter assembly 4 further includes: a wave ring 42, which is fixedly connected to the frame of the filter cartridge 41 and is located inside the filter cartridge 41; a cylinder 419, which is fixedly connected to the concave frame 413 and has a spring 421 inside; a ball head rod 420, which is slidably mounted on the cylinder 419 and has one end of the spring 421 fixedly connected to the ball head rod 420, with the ball head rod 420 corresponding to the position of the wave ring 42; and a striking rod 422, which is fixedly connected to the ball head rod 420 and consists of a round rod and multiple evenly arranged rubber columns. By setting the striking rod 422, it can strike the filter screen of the filter cartridge 41 while the needle seat 414 pushes out the impurities blocking the filter holes, thus vibrating the filter cartridge 41. 1. The impurities adsorbed on the surface are removed from the filter cartridge 41, reducing the accumulation of impurities on the filter cartridge 41 and improving the cleaning effect of the filter cartridge 41. During use, when the concave frame 413 rotates around the filter cartridge 41, the concave frame 413 drives the ball head rod 420 and the striking rod 422 to move. The ball head rod 420 moves in contact with the surface of the wave ring 42. Under the wave-shaped surface of the wave ring 42 and the elastic extension and contraction of the spring 421, the ball head rod 420 moves back and forth between the concave frame 413 and the wave ring 42. While the ball head rod 420 moves back and forth, it drives the striking rod 422 to move and strike the filter screen of the filter cartridge 41, causing the filter screen to vibrate and shake off the adsorbed impurities, so that the impurities fall off the filter cartridge 41, completing the cleaning of the impurities adsorbed on the surface of the filter screen.

[0025] Reference Figure 7 , Figure 8 and Figure 9As shown, this embodiment discloses that the impurity filtering assembly 4 further includes: an air cylinder 424, which is fixedly connected to the concave frame 413; a piston rod 425, which is slidably mounted on the air cylinder 424, wherein the piston rod 425 is composed of a round rod and a piston plate, and the round rod end of the piston rod 425 is fixedly connected to the striking rod 422; and a perforated cover 423, which is fixedly connected to the concave frame 413, wherein the perforated cover 423 is connected to the air cylinder 424 through an air pipe 426, and the surface of the perforated cover 423 is close to the filter cartridge 41. By providing the perforated cover 423, when the striking rod 422 shakes up the adsorbed impurities, Airflow is used to blow away the shaken impurities, reducing the possibility of secondary adsorption of the shaken impurities and further improving the cleaning effect of adsorption. During use, when the striking rod 422 moves back and forth, it drives the piston rod 425 to move back and forth, so that the piston plate of the piston rod 425 is placed inside the air cylinder 424. The movement pushes the gas inside the air cylinder 424 into the air pipe 426, and then enters the perforated cover 423 through the air pipe 426 and is discharged from multiple holes. After the airflow is discharged through multiple holes, it blows towards the filter holes, passes through the inside of the filter holes and is discharged, blowing away the adsorbed impurities shaken outside the filter cartridge 41, completing the further treatment of adsorbed impurities.

[0026] Reference Figure 5 and Figure 6 As shown, this embodiment discloses that the impurity filtering assembly 4 further includes: a rod 49, which is fixedly connected to the bracket 46, wherein the rod 49 passes through the filter cartridge 41 and is placed in a hole opened in the filter cartridge 41 for rotation; and a cleaning brush 410, which is bolted and threadedly mounted on the rod 49, wherein the cleaning brush 410 is in contact with the surface of the filter cartridge 41. By setting the cleaning brush 410, it can conform to the outer periphery of the filter cartridge 41 and make a circumferential motion, thereby sweeping away the impurities remaining on the surface of the filter cartridge 41 and reducing residual impurities. In cases where impurities accumulate on the filter cartridge 41, increasing the subsequent accumulation rate of impurities, the cleaning brush 410 is first installed on the rod 49 using bolt threads, so that the cleaning brush 410 is in contact with the surface of the filter cartridge 41. When the bracket 46 rotates, it drives the rod 49 to rotate, and the rod 49 drives the cleaning brush 410 to rotate in a circular motion against the filter cartridge 41. During the circular rotation, the cleaning brush 410 sweeps off the impurities adsorbed and remaining on the filter cartridge 41, thus completing the cleaning of the residual impurities on the surface of the filter cartridge 41.

[0027] Reference Figure 4 and Figure 5As shown, this embodiment discloses a sealing ring 44 fixed to the inner wall of the filter cartridge 41. The sealing ring 44 is sleeved on the rod 49. By setting the sealing ring 44, the gap between the rod 49 and the filter cartridge 41 frame can be sealed, reducing the possibility of unfiltered flue gas flowing in through the gap between the two and affecting the flue gas quality. A rubber plate 411 is fixed to the cleaning brush 410. The rubber plate 411 is attached to the surface of the filter cartridge 41 and is located in the middle of the cleaning brush 410. By setting the rubber plate 411, it can adhere to the surface of the filter cartridge 41 and scrape off the strongly adhesive impurities, further improving the cleaning effect of residual impurities on the surface of the filter cartridge 41 and increasing the cleanliness.

[0028] Reference Figure 5 and Figure 6 As shown, this embodiment discloses a conical cover 412 fixed to the rod 49 via a round rod, wherein the tip of the conical cover 412 faces away from the filter cartridge 41. By setting the conical cover 412, the contact area between the filter cartridge 41 and the flue gas near the conical cover 412 can be reduced, thereby reducing the resistance to the flue gas. The slope of the conical cover 412 itself guides the rising flue gas to the filter screen area of ​​the filter cartridge 41, improving the guiding and air intake effect of the flue gas. A ring rail 47 is fixed to the support 46, and a support rod 48 is fixed to the frame of the filter cartridge 41. The end of the support rod 48 near the support 46 is arc-shaped and placed inside the ring rail 47. By setting the ring rail 47 and the support rod 48, the support rod 48 can support the ring rail 47, thereby achieving auxiliary support and limiting of the support 46, reducing the shaking of the support 46 during rotation, and increasing the stability of the support 46.

[0029] The implementation principle of this invention is as follows: During operation, high-temperature pellets produced by the external rotary kiln enter the annular cooler 1. Cold air at the bottom of the cooler penetrates the material layer for heat exchange, generating high-temperature flue gas of about 400°C in the high-temperature zone 1. The high-temperature gas collection hood 2 collects the high-temperature flue gas in a fully sealed manner, settles large dust particles, and stabilizes the flue gas pressure and temperature. It is then transported to the top tangential inlet of the vertical cyclone mixer 3 through the main flue. The high-temperature flue gas swirls at high speed in the vertical cyclone mixer 3 and is forcibly mixed with the atomizing medium to achieve precise cooling and flue gas homogenization. The conditioned and stabilized flue gas is discharged from the bottom of the mixer and enters the waste heat boiler to recover steam for power generation and heating. A portion of the low-temperature flue gas after heat exchange and cooling is recycled back to the bottom wind box of the annular cooler to circulate and cool the pellets, realizing the cascade utilization of thermal energy.

[0030] In use, the frame of the filter cartridge 41 is first installed on the gas collecting hood 2 with bolts, so that the filter cartridge 41 is placed inside the gas collecting hood 2. When the annular cooler 1 cools the pellets, the high-temperature flue gas generated by the pellets enters the gas collecting hood 2 and is filtered by the filter cartridge 41. At this time, the motor 45 is started to drive the bracket 46 to rotate. The bracket 46 drives the concave frame 413 to rotate. The concave frame 413 drives the needle seat 414 to rotate around the circumference of the filter cartridge 41. The concave frame 413 drives the first gear 415 and the second gear 416 to move. Under the action of the second gear 416 meshing with the gear ring 43, the second gear 416 rotates during the movement. The second gear 416 drives the first gear 415 to rotate through the chain 417. The wheel 415 drives the needle holder 414 to rotate, causing the needle holder 414 to rotate in a circle on the filter screen surface that is in contact with the filter cartridge 41 while also rotating on its own axis. During the rotation, multiple small conical needles are inserted into the filter holes of the filter cartridge 41 in sequence, pushing out the impurities clogging the filter holes and cleaning the impurities in the filter holes. At the same time, when the small conical needles on the needle holder 414 are inserted into the filter holes of the filter cartridge 41, the rubber sleeve 418 is deformed and contracted by the pressure of the filter screen. When the small conical needles leave the filter holes, the filter screen separates from the rubber sleeve 418, and the rubber sleeve 418 elastically recovers and adheres to the surface of the small conical needles, pushing off the impurities adhering to their surface and cleaning the residual impurities on the needle holder 414, ensuring the cleanliness of the small conical needles. When the concave frame 413 rotates circumferentially around the filter cylinder 41, it drives the ball head rod 420 and the striking rod 422 to move. The ball head rod 420 moves in contact with the surface of the wave ring 42. Under the wave-like shape of the wave ring 42 and the elastic extension and contraction of the spring 421, the ball head rod 420 reciprocates left and right between the concave frame 413 and the wave ring 42. While reciprocating left and right, the ball head rod 420 drives the striking rod 422 to move and strike the filter screen of the filter cylinder 41, causing the filter screen to vibrate and shake off the adsorbed impurities. This causes impurities to fall off the filter cartridge 41. At the same time, when the striking rod 422 moves back and forth, it drives the piston rod 425 to move back and forth, so that the piston plate of the piston rod 425 is placed inside the air cylinder 424. The movement pushes the gas inside the air cylinder 424 into the air pipe 426, and then enters the perforated cover 423 through the air pipe 426 and is discharged from multiple holes. After the airflow is discharged through multiple holes, it blows towards the filter holes, passes through the inside of the filter holes and is discharged, blowing away the adsorbed impurities shaken up outside the filter cartridge 41, thus completing the cleaning of the adsorbed impurities on the surface of the filter screen. Meanwhile, the cleaning brush 410 is first installed on the rod 49 by bolt threads, so that the cleaning brush 410 is in contact with the surface of the filter cartridge 41. When the bracket 46 rotates, it drives the rod 49 to rotate. The rod 49 drives the cleaning brush 410 to rotate in a circle in contact with the filter cartridge 41. During the rotation, the cleaning brush 410 sweeps off the impurities adsorbed and remaining on the filter cartridge 41, thus cleaning the residual impurities on the surface of the filter cartridge 41 and completing the multiple self-cleaning treatment of the filter cartridge.

[0031] 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 device for drawing out and mixing flue gas from the high-temperature section of a pellet ring cooler, characterized in that: include: The annular cooler (1) is used to cool the pellets discharged from the external rotary kiln. The annular cooler (1) produces flue gas in three sections: high, medium and low temperature. A gas collection hood (2) is installed on the ring cooler body (1) and is used to collect flue gas in the high-temperature section of the ring cooler. Vertical swirl mixer (3), which is installed on the gas collection hood (2) and is used to mix high temperature flue gas and medium temperature flue gas to balance the flue gas temperature; The filter assembly (4) is located inside the gas collection hood (2). It can filter the flue gas impurities first, then roll out the impurities blocking the filter holes and generate vibration by knocking, shake up the adsorbed impurities and blow them away by airflow, so as to continuously ensure the flow of flue gas and filter impurities.

2. The high-temperature section flue gas extraction and mixing device for a pellet ring cooler according to claim 1, characterized in that: The impurity filtering component (4) includes: The filter cartridge (41) is composed of a frame and a filter screen, wherein the frame of the filter cartridge (41) is installed on the gas collection hood (2) by bolt threads; A toothed ring (43) is fixedly connected to the frame of the filter cartridge (41), wherein the toothed ring (43) is placed inside the filter cartridge (41); The motor (45) is fixedly connected to the frame of the filter cartridge (41), wherein the output end of the motor (45) is fixedly connected to the bracket (46) through the coupling, and a concave frame (413) is fixedly connected to the bracket (46). Needle seat (414), the needle seat (414) is rotatably mounted on the concave frame (413) by bearing, wherein the needle seat (414) is composed of a round rod and a plurality of small conical needle rods, the position and size of the conical needle rods are adapted to the position and size of the filter holes of the filter cartridge (41); The first gear (415) is fixedly connected to the needle seat (414); The second gear (416) is rotatably mounted on the concave frame (413) via a bearing, wherein the second gear (416) meshes with the gear ring (43); A chain (417) is sleeved on a first gear (415) and a second gear (416), wherein the chain (417) meshes with the first gear (415) and the second gear (416) respectively.

3. The high-temperature section flue gas extraction and mixing device for a pellet ring cooler according to claim 2, characterized in that: The needle holder (414) is fitted with a rubber sleeve (418), which encloses multiple small conical needle rods on the needle holder (414).

4. The high-temperature section flue gas extraction and mixing device for a pellet ring cooler according to claim 2, characterized in that: The filter assembly (4) also includes: A corrugated ring (42) is fixed to the frame of the filter cartridge (41), wherein the corrugated ring (42) is placed inside the filter cartridge (41); A cylinder (419) is fixedly connected to a concave frame (413), wherein a spring (421) is provided inside the cylinder (419). A ball joint (420) is slidably mounted on a cylinder (419), wherein one end of a spring (421) is fixedly connected to the ball joint (420), and the ball joint (420) is positioned opposite to the wave ring (42); A striking rod (422) is fixedly connected to a ball head rod (420), wherein the striking rod (422) is composed of a round rod and a plurality of uniformly arranged rubber columns.

5. The high-temperature section flue gas extraction and mixing device for a pellet ring cooler according to claim 4, characterized in that: The filter assembly (4) also includes: Air cylinder (424), which is fixedly connected to concave frame (413); Piston rod (425), which is slidably mounted on air cylinder (424), wherein the piston rod (425) is composed of a round rod and a piston plate, and the round rod end of the piston rod (425) is fixedly connected to the striking rod (422); A perforated cover (423) is fixedly connected to a concave frame (413), wherein the perforated cover (423) is connected to an air cylinder (424) via an air pipe (426), and the surface of the perforated cover (423) is close to the filter cartridge (41).

6. The high-temperature section flue gas extraction and mixing device for a pellet ring cooler according to claim 2, characterized in that: The filter assembly (4) also includes: Rod (49), which is fixedly connected to the bracket (46), wherein the rod (49) passes through the filter cylinder (41) and is placed in the hole opened on the filter cylinder (41) for rotation; A cleaning brush (410) is mounted on a rod (49) by bolt threads, wherein the cleaning brush (410) is in contact with the surface of the filter cartridge (41).

7. The high-temperature section flue gas extraction and mixing device for a pellet ring cooler according to claim 6, characterized in that: The filter cartridge (41) has a sealing ring (44) fixed to its inner wall, and the sealing ring (44) is sleeved on the rod (49).

8. The high-temperature section flue gas extraction and mixing device for a pellet ring cooler according to claim 6, characterized in that: A rubber plate (411) is fixedly attached to the cleaning brush (410), wherein the rubber plate (411) is in contact with the surface of the filter cartridge (41), and the rubber plate (411) is located in the middle of the cleaning brush (410).

9. The high-temperature section flue gas extraction and mixing device for a pellet ring cooler according to claim 6, characterized in that: A conical cover (412) is fixed to the rod (49) by a round rod, wherein the tip of the conical cover (412) faces away from the filter cartridge (41).

10. The high-temperature section flue gas extraction and mixing device for a pellet ring cooler according to claim 2, characterized in that: A ring rail (47) is fixedly connected to the bracket (46), and a support rod (48) is fixedly connected to the frame of the filter cartridge (41). The end of the support rod (48) near the bracket (46) is arc-shaped and placed inside the ring rail (47).

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