A boiler flue gas blue removal system based on multi-stage collaborative treatment

Abstract

This invention relates to the field of boiler flue gas centrifugal purification technology, specifically to a boiler flue gas de-blueing treatment system based on multi-stage synergistic treatment. The system includes a centrifugal furnace and a collection furnace located below the centrifugal furnace. The collection furnace contains an oil droplet collection device and a drive motor. Several baffles are evenly arranged inside the centrifugal furnace, dividing it into several separation chambers. A vortex fan driven by the drive motor is located at the bottom of each separation chamber, above the baffles. The baffles have a conical structure, and a delay component with a conical structure opposite to the baffle is located at the center of each baffle. By dividing the centrifugal furnace into multiple separation chambers with baffles and vortex fans at the bottom of each separation chamber, the flue gas entering the centrifugal furnace can continuously receive additional centrifugal acceleration as it rises layer by layer, effectively overcoming the problem of incomplete separation caused by centrifugal force gradient stratification.

Description

Technical Field

[0001] This invention relates to the field of boiler flue gas centrifugal purification technology, and more specifically, to a boiler flue gas blue removal treatment system based on multi-stage synergistic treatment. Background Technology

[0002] With industrial development, the problem of flue gas pollution from high-energy-consuming industries such as metal smelting has become increasingly serious. When boiler combustion is incomplete, unburned oil combines with dust to form blue plumes, which not only violates relevant environmental protection regulations but may also lead to oil accumulation in equipment, fire risks, and environmental pollution. The comprehensive treatment project for blue plume removal from boiler flue gas falls under the field of environmental engineering, specifically categorized as air pollution control engineering. Its core is to solve the atmospheric environmental problems caused by pollutant emissions from industrial boiler flue gas through technical means.

[0003] Existing flue gas treatment methods often involve primary separation, where dust-laden flue gas enters through the inlet of a cyclone tower and forms a high-speed vortex under the action of the cyclone plate. Centrifugal force is used to separate large oil droplets, dust and gas from the gas. Then, there is secondary filtration. After the gas is treated by the cyclone tower, it enters the cartridge dust collector, where micron-sized dust and oily particles are captured by physical interception on the surface of the cartridge.

[0004] In the initial separation stage, current centrifugal purification equipment faces several challenges. First, as flue gas enters from the bottom of the equipment and undergoes centrifugal acceleration, particles near the acceleration zone are more easily separated due to the stronger centrifugal force. However, the flue gas above the acceleration zone does not receive sufficient centrifugal force, resulting in low separation efficiency and a significant centrifugal force gradient stratification. Furthermore, considering the limited height of the equipment and the continuous input of flue gas, and the vortex formed by the accelerated flue gas, the residence time of the flue gas within the device is short, insufficient to complete a thorough centrifugal separation process, further exacerbating the problem of incomplete separation. This situation not only affects the overall purification effect of the equipment but also limits the improvement of its processing capacity.

[0005] Based on this, the present invention discloses a boiler flue gas blue removal treatment system based on multi-level collaborative processing. Summary of the Invention

[0006] To address the problem in the background art where, in the primary separation stage of centrifugal purification equipment, the centrifugal force gradient stratification formed after the flue gas enters and the insufficient residence time due to equipment height limitations prevent the particulate matter in the flue gas from being fully separated, thus affecting the overall purification effect, this invention provides a boiler flue gas blue removal treatment system based on multi-stage synergistic treatment. It includes a centrifugal furnace and a collection furnace set below the centrifugal furnace. The collection furnace is equipped with an oil droplet collection device and a drive motor. The flue gas enters from the bottom of the centrifugal furnace.

[0007] Because the flue gas entering the centrifuge is accelerated by centrifugation, a centrifugal force gradient stratification occurs from bottom to top in the centrifuge, causing differences in separation effect;

[0008] As a further improvement to this technical solution, a number of partitions are evenly arranged inside the centrifuge, which divide the centrifuge into a number of separation chambers. At the same time, a vortex fan driven by a drive motor is arranged at the bottom of each separation chamber, that is, above the partition. The output end of the drive motor is provided with a drive rod, which passes through the partitions and the delay component and is connected to the vortex fan corresponding to each separation chamber. The drive rod extends into the delay component located at the top.

[0009] In this scheme, since the flue gas in each separation chamber will form a vortex after acceleration, and the centrifugal furnace is divided into several separation chambers by baffles, the height of the separation zone is further shortened. Therefore, in order to increase the residence time of the flue gas in the separation chamber and further improve the separation effect of the flue gas in the separation chamber.

[0010] As a further improvement to this technical solution, the partition has a conical structure, and a delay component is provided at the center of the partition. The delay component has a conical structure opposite to that of the partition.

[0011] Based on this, in order to allow the air located in the central region of the centrifugal furnace to escape smoothly through the delay component to the next separation chamber for separation, it is also necessary to increase the residence time of the flue gas in the separation chamber and accelerate the rotation of the flue gas entering the next separation chamber in advance.

[0012] As a further improvement to this technical solution, the delay component includes a conveying cylinder, inside which a spiral pusher blade is provided. The spiral pusher blade is fixed on a drive rod. The conveying cylinder is connected to the drive rod through the spiral pusher blade. The conveying cylinder has a cylindrical structure. A delay cover is provided at the top of the conveying cylinder. The delay cover has a conical structure opposite to the partition structure. The bottom of the delay cover is connected to the conveying cylinder.

[0013] In another approach, since the oil droplets from the flue gas after centrifugation will accumulate on the inner wall of the centrifuge and scatter on the surface of the baffle, the accumulated oil droplets need to be treated and collected in a timely manner to prevent them from affecting the subsequent purification effect.

[0014] As a further improvement to this technical solution, the top of the delay cover extends beyond the top of the partition and leaves a gap with the top of the partition; an oil scraping component is slidably disposed inside the top center of the partition, which is driven by the vortex in the separation chamber to scrape off the oil droplets accumulated on the surface of the partition; a blocking cover is fixedly provided on the top of the delay cover, the center of the blocking cover is connected to the top of the delay cover, and the blocking cover has a sleeve structure around the top of the delay cover.

[0015] As a further improvement to this technical solution, a groove is provided on the inner wall of the top of the partition. The oil scraping assembly includes a slider slidably connected in the groove. A connecting rod is fixed on the slider. The upper and lower ends of the connecting rod are respectively located near the upper and lower surfaces of the partition. An installation rod is fixed at the upper end of the connecting rod, and a scraper is fixed at the bottom of the installation rod. A drive fan blade is fixed at the bottom end of the connecting rod. The scraper is perpendicular to the upper surface of the partition, and the bottom of the scraper is adapted to and fits the structure of the upper surface of the partition. The bottom of the scraper is made of rubber and is composed of several rubber strips. The drive fan blade has an arc-shaped structure along the radial direction of the partition. The height of the drive fan blade gradually decreases from the center to the periphery, and the end of the drive fan blade near the periphery of the partition is lower than the height of the partition.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In this boiler flue gas deblueing treatment system based on multi-stage synergistic treatment, the centrifugal furnace is divided into multiple separation chambers by setting baffles, and a vortex fan is installed at the bottom of each separation chamber. This allows the flue gas entering the centrifugal furnace to continuously receive additional centrifugal acceleration during the upward process, thereby ensuring sufficient separation of particulate matter. This effectively overcomes the problem of incomplete separation caused by centrifugal force gradient stratification and improves the overall purification efficiency.

[0018] 2. In this boiler flue gas blue removal system based on multi-stage collaborative treatment, the conical baffle structure and the delay component not only adapt to the accelerated vortex shape, but also increase the residence time of the flue gas in the separation chamber, further improving the separation effect. This allows the flue gas near the axis to pass through the delay component first and enter the next separation layer after more refined screening, ensuring the high efficiency and comprehensiveness of the purification process.

[0019] 3. In this boiler flue gas blue removal system based on multi-stage collaborative treatment, a delay component consisting of a spiral pusher blade and a delay hood is used. This not only increases the residence time of the flue gas in the current separation chamber, but also prepares the flue gas for accelerated rotation in advance, enhancing the vortex effect in the next separation chamber. This helps to compensate for some of the centrifugal force lost due to passing through the delay hood, ensuring that each layer of flue gas can maintain a high separation efficiency.

[0020] 4. In this boiler flue gas blue removal system based on multi-stage collaborative treatment, the design of the oil scraping component solves the problem of oil droplet accumulation affecting the purification effect during long-term operation. The oil scraping component can use the vortex generated in the separation chamber to automatically remove the oil droplets accumulated on the surface of the baffle, preventing them from interfering with the subsequent separation process and ensuring the continuous and efficient operation of the system. Attached Figure Description

[0021] Figure 1This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a cross-sectional view of the centrifuge furnace of the present invention;

[0023] Figure 3 This is a schematic diagram of the partition structure of the present invention;

[0024] Figure 4 This is a cross-sectional view of the partition of the present invention;

[0025] Figure 5 This is a schematic diagram of the oil scraping assembly of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the delay component of the present invention;

[0027] Figure 7 for Figure 6 Enlarged view of the structure at point A in the middle.

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Centrifuge; 2. Collection furnace; 3. Separation chamber; 4. Drive motor; 5. Drive rod; 6. Vortex fan; 7. Baffle plate; 8. Leakage hole; 9. Slide chute; 10. Oil scraping assembly; 11. Delaying assembly; 12. Baffle cover;

[0030] 111. Conveyor cylinder; 112. Spiral pusher blade; 113. Delay cover;

[0031] 101. Slider; 102. Connecting rod; 103. Mounting rod; 104. Scraper; 105. Drive blade. Detailed Implementation

[0032] 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.

[0033] In the initial separation stage, existing centrifugal purification equipment suffers from insufficient separation of particulate matter due to the centrifugal force gradient stratification formed after the flue gas enters and the insufficient residence time caused by equipment height limitations. This results in a failure to fully separate particulate matter in the flue gas, affecting the overall purification effect.

[0034] Therefore, this invention provides a boiler flue gas blue removal system based on multi-stage collaborative processing. See [link to relevant documentation]. Figures 1-2As shown, it includes a centrifugal furnace 1 and a collecting furnace 2 located below the centrifugal furnace 1. The collecting furnace 2 is equipped with an oil droplet collecting device and a drive motor 4. The flue gas enters from the bottom of the centrifugal furnace 1.

[0035] Because the flue gas entering the centrifuge furnace 1 is centrifuged and accelerated, a centrifugal force gradient stratification occurs from bottom to top in the centrifuge furnace 1, causing differences in separation effect. The present invention uses a number of partitions 7 evenly arranged inside the centrifuge furnace 1. The partitions 7 divide the centrifuge furnace 1 into a number of separation chambers 3. At the same time, a vortex fan 6 driven by a drive motor 4 is arranged at the bottom of each separation chamber 3, that is, above the partitions 7. The output end of the drive motor 4 is provided with a drive rod 5. The drive rod 5 passes through the partitions 7 and the delay component 11 and is connected to the vortex fan 6 corresponding to each separation chamber 3. The drive rod 5 extends into the delay component 11 located at the top.

[0036] During operation, the flue gas enters from the bottom of the centrifugal furnace 1 and is accelerated and centrifuged in the bottom separation chamber 3. The resulting vortex begins to rise. The flue gas that has not been separated in the separation chamber 3 enters the second separation chamber 3. In the second separation chamber 3, it is further accelerated by the vortex fan 6 at the bottom, which makes up for the centrifugal acceleration that was originally lost. Then the flue gas in this area is separated again. This process is repeated step by step upwards, with multiple layers of separation and acceleration to ensure the separation effect. Finally, the flue gas with large oil droplets separated enters the next stage for purification.

[0037] Furthermore, refer to Figures 2-4 As shown, since the flue gas in each separation chamber 3 will form a vortex after acceleration, and the centrifugal furnace 1 is divided into several separation chambers 3 by the partition 7, the height of the separation zone is further shortened. Therefore, in order to increase the residence time of the flue gas in the separation chamber 3 and further improve the separation effect of the flue gas in the separation chamber 3, the present invention adopts the partition 7 as a conical structure, and the partition 7 is provided with a delay component 11 at the center position. The delay component 11 is a conical structure opposite to that of the partition 7.

[0038] During operation, after the flue gas enters the separation chamber 3, it is accelerated by the vortex fan 6 to form a vortex. The airflow gradually forms a conical structure and tends to rise. Therefore, the conical structure of the baffle 7 is adapted to the accelerated vortex, so that the top of the baffle 7 blocks the top of the vortex. The blocked vortex sinks and is accelerated and rotated again, thereby further separating the flue gas. As the flue gas is continuously replenished, the flue gas near the axis of the centrifugal furnace 1 will have a higher purification level than the flue gas far from the axis. Therefore, the flue gas near the center can escape through the delay component 11 and enter the next separation chamber 3 for further centrifugal separation. In other words, through the series design of the multi-stage separation chamber 3, and in conjunction with the drive rod 5 to link each layer of vortex fans 6, step-by-step centrifugal acceleration compensation is achieved. After the flue gas is accelerated by the bottom vortex fan 6, the vortex fan 6 in the upper separation chamber 3 can further enhance the attenuated centrifugal force. This gradient enhancement mechanism effectively alleviates the separation efficiency stratification phenomenon caused by the attenuation of the centrifugal force field in traditional devices, and improves the particulate matter classification and collection efficiency by about 40%.

[0039] Specifically, refer to Figure 6 As shown, in order to allow the air located in the central region of the centrifugal furnace 1 to escape smoothly through the delay component 11 to the next separation chamber 3 for separation, while also satisfying the above-mentioned requirement of increasing the residence time of flue gas in the separation chamber 3, and accelerating the rotation of the flue gas entering the next separation chamber 3 in advance to improve the vortex effect of the flue gas in the next separation chamber 3, the present invention adopts the delay component 11, which includes a conveying cylinder 111. The conveying cylinder 111 is provided with a spiral pusher blade 112. The spiral pusher blade 112 is fixed on the drive rod 5. The conveying cylinder 111 is connected to the drive rod 5 through the spiral pusher blade 112. The conveying cylinder 111 has a cylindrical structure. The top of the conveying cylinder 111 is provided with a delay cover 113. The delay cover 113 has a conical structure opposite to that of the partition 7. The bottom of the delay cover 113 is connected to the conveying cylinder 111.

[0040] During operation, the flue gas, accelerated to form a vortex, rotates and separates within the separation chamber 3. The structure of the delay hood 113 is adapted to the structure of the partition 7, such as... Figure 6 An annular V-shaped separation zone is formed between the delay hood 113 and the partition 7. This V-shaped separation zone can increase the residence time of the flue gas and provide more separation space for the flue gas. In addition, combined with the inverted conical structure of the extension of the delay hood 113, the flue gas located at the bottom and inner ring can be screened, so that this part of the flue gas enters the next separation chamber 3 first.

[0041] Because the flue gas in this part is relatively thin, and the flue gas entering the next separation chamber 3 after passing through the delay hood 113 (i.e., the central area of ​​the partition 7) loses some centrifugal force due to the obstruction of the delay hood 113, the design of the spiral pusher blade 112 allows the flue gas near the central area to be fed into the delay hood 113 in portions through the spiral pusher blade 112. With the rotation of the spiral pusher blade 112 and the delay hood 113 along with the drive rod 5, the centrifugal force loss of the flue gas caused by the delay hood 113 is compensated, so that the centrifugal force of the flue gas entering the next separation chamber 3 is still relatively large. With the acceleration of the vortex fan 6 in the next separation chamber 3, the centrifugal force will increase step by step. Therefore, the separation effect of the flue gas that finally escapes through the top separation chamber 3 will be better than that of the traditional method.

[0042] It is worth noting that, in order to increase the residence time and separation effect of the flue gas in the separation chamber 3, the height of the delay hood 113 is higher than the height of the partition 7. This results in a higher internal purification effect for the flue gas after the vortex is formed compared to the external one. At the same time, the bottom flue gas has a better purification effect due to its proximity to the acceleration zone of the vortex fan 6. Therefore, the bottom flue gas has a higher purification effect than the top one. Thus, by making the height of the delay hood 113 higher than the height of the partition 7, the gas with a better purification effect enters the next separation chamber 3 first, while the remaining flue gas is further separated in the original separation chamber 3. This not only improves the separation effect at each level but also further improves the separation effect within the original separation chamber 3, providing multiple guarantees for the separation of flue gas.

[0043] Furthermore, refer to Figures 6-7 As shown, after centrifugation, oil droplets from the flue gas accumulate on the inner wall of the centrifuge furnace 1 and scatter on the surface of the baffle 7. These accumulated oil droplets need to be collected and processed promptly to prevent them from affecting subsequent purification. Therefore, the top of the delay hood 113 extends beyond the top of the baffle 7 and leaves a gap with it, providing space for the rotation of the delay hood 113. Furthermore, an oil scraping assembly is slidably installed inside the center top of the baffle 7, driven by the vortex in the separation chamber 3 to scrape away the oil droplets accumulated on the surface of the baffle 7. 10. In this way, when the oil scraping assembly 10 needs to rotate for operation, the top of the delay cover 113 can also provide rotation space for the oil scraping assembly 10; and since there is a gap between the top of the delay cover 113 and the partition 7, in order to reduce the escape of flue gas from the gap rather than from inside the delay cover 113, a baffle 12 is fixedly provided on the top of the delay cover 113. The center of the baffle 12 is connected to the top of the delay cover 113, and the baffle 12 has a sleeve structure around the top of the delay cover 113; after this setting, refer to Figure 6 It can be seen that the sleeve-type baffle 12 can block the gap between the delay hood 113 and the partition 7, reducing the escape of flue gas from this point.

[0044] The partition 7 has a groove 9 on its inner wall at the top. The oil scraping assembly 10 includes a slider 101 slidably connected in the groove 9. A connecting rod 102 is fixed on the slider 101. The upper and lower ends of the connecting rod 102 are respectively located near the upper and lower surfaces of the partition 7. An installation rod 103 is fixed at the upper end of the connecting rod 102. A scraper 104 is fixed at the bottom of the installation rod 103. A drive blade 105 is fixed at the bottom end of the connecting rod 102. The scraper 104 is perpendicular to the upper surface of the partition 7, and the bottom of the scraper 104 is adapted to and fits the structure of the upper surface of the partition 7. The bottom of the scraper 104 is made of rubber and is composed of several rubber strips. The drive blade 105 has an arc-shaped structure along the radial direction of the partition 7. The height of the drive blade 105 gradually decreases from the center to the periphery, and the end of the drive blade 105 near the periphery of the partition 7 is lower than the height of the partition 7.

[0045] During operation, the vortex within the separation chamber 3 impacts the drive blade 105, causing it to rotate. The arc-shaped structure of the drive blade 105 provides better propulsion, further driving its rotation. To avoid affecting the separation effect of the flue gas near the inner wall of the centrifugal furnace 1, the drive blade 105, located near the inner wall of the centrifugal furnace 1 (i.e., around the baffle 7), gradually decreases in height. This reduces the impact of the vortex on the flue gas in that area. The closer to the center of the baffle 7, the more already separated the flue gas becomes. To reduce the vortex effect of the flue gas near the delay hood 113 and facilitate its escape from the conveyor cylinder 111, the vortex effect of the flue gas near the delay hood 113 can be appropriately reduced. Therefore, the area of ​​the drive fan blade 105 near the delay hood 113 is relatively high, making the flue gas vortex effect in this area more obvious, thus making the driving fan blade 105 more effective. In summary, the existence of the drive fan blade 105 serves two purposes: firstly, it can be propelled by the stronger vortex near the delay hood 113, and secondly, it can also achieve the purpose of reducing the vortex effect of the flue gas in this area.

[0046] It should be noted that, firstly, the driving fan blade 105 only affects the vortex effect of a portion of the flue gas in the region of the delay hood 113, thereby utilizing the vortex effect of the flue gas in this region to achieve the driving force to propel the driving fan blade 105; secondly, the region has a spiral pusher blade 112 to transport the flue gas, therefore there are mutually compensating mechanisms to adapt to the operation of the system; that is, the annular V-shaped separation zone formed by the conical baffle 7 and the inverted conical delay hood 113 forms a local backflow through abrupt changes in the flow channel cross-section. When the flue gas generates a spiral upward motion under the drive of the vortex fan 6, it generates a secondary circulation guided by the V-shaped structure, reducing the axial velocity by more than 30%, and extending the effective separation time of particulate matter to 2.1 times that of conventional devices; at the same time, the V-shaped flow channel enhances the particle size classification effect, with coarse particles preferentially settling in the circulation.

[0047] Specifically, the drive fan blade 105 rotates, which in turn drives the mounting rod 103 to rotate via the connecting rod 102, thereby causing the scraper 104 to scrape off the oil droplets accumulated on the surface of the partition plate 7.

[0048] After being scraped off, the oil droplets flow to the outer periphery of the partition 7. Because the partition 7 has a conical structure, its surface is inclined. After being scraped off, the oil droplets gather under the action of gravity and converge at the joint between the partition 7 and the inner wall of the centrifugal furnace 1. The oil droplets separated by centrifugation on the inner wall of the centrifugal furnace 1 also fall under the action of gravity. Therefore, several leakage holes 8 are circumferentially opened around the area where the partition 7 contacts the inner wall of the centrifugal furnace 1. In this way, the oil droplets will gradually flow into the oil droplet collection device set at the bottom of the collection furnace 2 through the leakage holes 8.

[0049] In summary, by utilizing the centrifugal force dynamic compensation mechanism of the multi-stage separation chamber 3, the residence time optimization through V-shaped flow field reconstruction, the pre-acceleration characteristics of the spiral pusher blade 112, the self-cleaning function of the oil scraper assembly 10, and the escape suppression design of the baffle hood 12, a five-dimensional synergistic enhancement effect is formed. This effectively solves the problem that existing centrifugal purification equipment, in the primary separation stage, suffers from insufficient residence time due to the centrifugal force gradient stratification formed after the flue gas enters and the equipment height limitation, resulting in the inability of particulate matter in the flue gas to be fully separated, thus affecting the overall purification effect.

[0050] 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. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage cooperative treatment-based boiler flue gas decolorization treatment system, comprising a centrifugal furnace (1) and a collection furnace (2) arranged below the centrifugal furnace (1), wherein the collection furnace (2) is provided with an oil droplet collection device and a driving motor (4), and characterized in that: A plurality of partitions (7) are evenly arranged in the centrifugal furnace (1), and the partitions (7) separate the centrifugal furnace (1) into a plurality of separation chambers (3); The vortex fan (6) driven by the driving motor (4) is arranged above the partition (7) in the bottom of the separation chamber (3). The partition (7) is in a right circular conical structure, a delay assembly (11) is arranged at the center of the partition (7), and the delay assembly (11) is in a conical structure opposite to the partition (7). The delay assembly (11) comprises a delay cover (113) in a conical structure opposite to the partition (7), and the right circular conical partition (7) and the inverted conical delay cover (113) form an annular V-shaped separation area, and local backflow is formed by sudden change of the flow passage section.

2. The multi-stage co-processing based boiler flue gas de-NOx system according to claim 1, characterized in that: The output end of the driving motor (4) is provided with a driving rod (5), the driving rod (5) penetrates through a plurality of partitions (7) and delay assemblies (11) and is connected with the vortex fan (6) corresponding to each separation chamber (3), and the driving rod (5) extends into the delay assembly (11) at the top.

3. The multi-stage co-processing based boiler flue gas dedusting system according to claim 2, characterized in that: The delay assembly (11) comprises a conveying cylinder (111), the conveying cylinder (111) is provided with a spiral pushing blade (112), the spiral pushing blade (112) is fixed on the driving rod (5), the conveying cylinder (111) is connected with the driving rod (5) through the spiral pushing blade (112), the conveying cylinder (111) is in a cylindrical structure, the top of the conveying cylinder (111) is provided with the delay cover (113) in a conical structure opposite to the partition (7), the bottom of the delay cover (113) is communicated with the conveying cylinder (111), and the top of the delay cover (113) extends to the outside of the top of the partition (7) and leaves a gap with the top of the partition (7).

4. The multi-stage co-processing based boiler flue gas dedusting system according to claim 3, characterized in that: The top of the delay cover (113) is fixedly provided with a blocking cover (12), the center of the blocking cover (12) is communicated with the top of the delay cover (113), and the blocking cover (12) is in a sleeve structure around the top of the delay cover (113).

5. The multi-stage co-processing based boiler flue gas dedusting system according to claim 3, characterized in that: The height of the delay cover (113) is higher than the height of the partition (7).

6. The multi-stage co-processing based boiler flue gas de-NOx system according to claim 1, characterized in that: The periphery of the partition (7) in contact with the inner wall of the centrifugal furnace (1) is provided with a plurality of liquid leakage holes (8) in a circumferential direction.

7. The multi-stage co-processing based boiler flue gas dedusting system according to claim 1, characterized in that: A scraping oil assembly (10) for scraping oil droplets accumulated on the surface of the partition (7) in the separation chamber (3) is slidably arranged in the center of the top of the partition (7).

8. The multi-stage co-processing based boiler flue gas dedusting system according to claim 7, characterized in that: A sliding groove (9) is arranged in the inner wall of the top end of the partition (7), the scraping oil assembly (10) comprises a sliding block (101) slidably connected in the sliding groove (9), a connecting rod (102) is fixedly arranged on the sliding block (101), the upper and lower ends of the connecting rod (102) are arranged close to the upper and lower surfaces of the partition (7) respectively, a mounting rod (103) is fixedly arranged at the upper end of the connecting rod (102), a scraper (104) is fixedly arranged at the bottom of the mounting rod (103), and a driving fan blade (105) is fixedly arranged at the bottom end of the connecting rod (102).

9. The multi-stage co-processing based boiler flue gas dedusting system according to claim 8, characterized in that: The scraper (104) is arranged perpendicularly to the upper surface of the partition plate (7), and the bottom of the scraper (104) is matched with the structure of the upper surface of the partition plate (7), the bottom of the scraper (104) is made of rubber, and the bottom of the scraper (104) is composed of a plurality of rubber strips.

10. The multi-stage co-processing based boiler flue gas dedusting system according to claim 9, characterized in that: The driving fan blade (105) is in an arc structure along the radial direction of the partition plate (7), the height of the driving fan blade (105) gradually decreases from the center to the periphery, and the end of the driving fan blade (105) close to the periphery of the partition plate (7) is lower than the height of the partition plate (7).

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