Anti-blocking mechanism of air preheater

Abstract

The utility model provides an anti-blocking mechanism of an air preheater, and belongs to the technical field of air preheaters. Comprising a connecting pipe connected with a smoke inlet of an air preheater body, the inner wall of the connecting pipe is slidably connected with a filter pipe, a first limiting groove is formed in the filter pipe, and an air inlet and an air outlet are formed in the two sides of the filter pipe respectively; according to the utility model, the filter plate and the filter pipe are matched for use, the boiler tail gas is discharged into the connecting pipe, the filter pipe is divided into the S-shaped space by the pair of partition plates in the filter pipe, and the flue gas flows along the S-shaped space in the filter pipe, so that the contact time of the flue gas and the filter plate is prolonged; the additive arranged in the filter plate reacts with sulfur dioxide carried in the flue gas to decompose the sulfur dioxide and reduce the content of the sulfur dioxide in the flue gas, so that corrosion of the sulfur dioxide to a heating surface in the air preheater main body is reduced, and the problem of blockage of the air preheater caused by corrosion of the heating surface by the sulfur dioxide is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheaters, in particular to an anti-blocking mechanism for air preheaters. Background Art

[0002] Air preheater, also referred to as air preheater, is a preheating device that improves the heat exchange performance of the boiler and reduces heat loss. The function of the air preheater is to transfer the heat carried by the flue gas discharged from the tail flue of the boiler to the air before entering the boiler through the heat sink, and preheat the air to a certain temperature. The heat carried by the flue gas will be absorbed by the heat sink in the air preheater, and then the air preheater will rotate slowly, and the heat sink will move to the air side, and then transfer the heat to the air before entering the boiler. The air preheater is easy to use, simple to operate, safe to run, and can improve the heat exchange performance of the boiler system. Therefore, it is widely used in flue gas boiler systems.

[0003] In the prior art, the air preheater will be exposed to the flue gas discharged from the boiler and the particulate dust carried therein when working. The accumulation of dust for a long time will form ash blockage. Due to the long-term accumulation of dust and scaling on the heating surface, water vapor and SO3 are easily adhered to the ash scale, which aggravates the corrosion of the air preheater. A filtering device can be installed at the air inlet of the air pipe. For example, a Chinese patent with patent publication number CN219828888U discloses an anti-clogging smoke pipe mechanism and an air preheater, which includes a fixed support assembly, including a box body, a hollow groove arranged on the outer wall of the box body, a smoke inlet and a smoke outlet; and a filter assembly, including a filter element movably arranged inside the box body; a support assembly, including a tank body and a support frame; and a heat exchange assembly, including a coil arranged inside the tank body and a breathable plate arranged inside the tank body. The above-mentioned anti-blocking mechanism uses a filter plate to filter large particles of smoke, and the filter plate cannot process the sulfur dioxide gas carried in the flue gas, which may cause the air preheater to corrode when it contacts the sulfur dioxide gas carried in the flue gas discharged from the boiler. The corroded substances may also cause blockage of the air preheater, affecting the operation of the air preheater. Therefore, the present application provides an air preheater anti-blocking mechanism to meet the needs. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an air preheater anti-blocking mechanism to solve the problem that the existing anti-blocking mechanism uses a filter plate to screen large particles of smoke, and the filter plate cannot process the sulfur dioxide gas carried in the flue gas, resulting in the air preheater being corroded when contacting the sulfur dioxide gas carried in the flue gas discharged from the boiler, and the corroded substances will also cause blockage of the air preheater, affecting the operation of the air preheater.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] An air preheater anti-blocking mechanism comprises a connecting pipe connected to the smoke inlet of the air preheater body, the inner wall of the connecting pipe is slidably connected with a filter tube, the filter tube is provided with a first limiting groove, the two sides of the filter tube are respectively provided with an air inlet and an air outlet, the inner wall of the filter tube is fixedly connected with a pair of partitions, the side walls of the partitions are fixedly connected with a plurality of filter plates, one side of the filter plate is connected to the inner wall of the filter tube, and one side of the inner wall of the connecting pipe is provided with a mounting groove; a particle dust filter assembly is also provided in the connecting pipe, the particle dust filter assembly The particle dust filtering assembly is used to filter the particle dust in the flue gas entering the connecting pipe, and the particle dust filtering assembly is detachably connected to the inner wall of the connecting pipe; the inner wall of the connecting pipe is also provided with a fixing assembly, and the fixing assembly is used to clamp and fix the particle dust filtering assembly and the filter tube, and the fixing assembly is connected to the inner wall of the connecting pipe; the inner wall of the connecting pipe is also provided with a detection assembly, and the detection assembly is used to detect the flow rate of the flue gas after filtering, and the detection assembly is connected to the inner wall of the connecting pipe.

[0007] Optionally, the particle dust filtering assembly includes a mounting sleeve slidably connected to the inner wall of the connecting pipe, a plurality of filter cartridges are fixedly connected to the mounting sleeve, and second limiting grooves are provided on both sides of the mounting sleeve.

[0008] Optionally, the fixing assembly includes two pairs of baffles fixedly connected to the inner wall of the connecting tube, each of the baffles is fixedly connected to a mounting rod, each of the mounting rods is rotatably connected to a gear rod, a limiting hole is provided on the gear rod, a slot is provided on the baffle, one side of the inner wall of the slot is fixedly connected to one end of the telescopic rod, the other end of the telescopic rod is fixedly connected to a block, one side of the inner wall of the slot is fixedly connected to one end of a limiting spring, the other end of the limiting spring is fixedly connected to one side of the block, the bottom of the block abuts against the side wall of the gear rod, one side of the two pairs of gear rods abut against one side of the mounting sleeve and one side of the filter tube respectively, and two pairs of positioning plates are fixedly connected to the inner wall of the connecting tube, one side of the two pairs of positioning plates abut against the other side of the mounting sleeve and the other side of the filter tube respectively.

[0009] Optionally, the detection component includes a speed measuring probe rotatably connected to the inner wall of the mounting groove, a sensor is provided on the connecting pipe, and the speed measuring probe and the sensor are electrically connected.

[0010] Optionally, the mounting rod includes a fixed rod and a fixed block connected to each other, one end of the fixed rod is fixedly connected to one side of the baffle, and the cross-section of the fixed rod is a semicircular structure.

[0011] Optionally, the limiting hole is in a three-quarter circle structure.

[0012] Optionally, arc grooves are provided on both sides of the gear lever.

[0013] Optionally, the cross section of the stop block is a wedge-shaped structure, and a flat surface of the stop block abuts against one side of the stop rod.

[0014] Optionally, the partition has a U-shaped structure.

[0015] Optionally, the air inlet and the air outlet are staggered on the filter tube.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] In the above scheme, the boiler exhaust gas is discharged into the connecting pipe through the coordinated use of the filter plate and the filter tube, and the flue gas filtered by the particulate dust filter assembly enters the filter tube from the air inlet. A pair of partitions divide the filter tube into an S-shaped space in the filter tube. The flue gas flows along the S-shaped space in the filter tube, which prolongs the contact time with the filter plate and improves the filtering effect of the filter plate on sulfur dioxide in the flue gas. The additives arranged in the filter plate can react with the sulfur dioxide carried in the flue gas, decompose the sulfur dioxide and reduce the sulfur dioxide content in the flue gas, thereby reducing the corrosion of sulfur dioxide on the heating surface in the main body of the air preheater, and avoiding the blockage of the air preheater caused by the corrosion of the heating surface by sulfur dioxide.

[0018] By setting the filter cartridge, when the flue gas is discharged into the connecting pipe, it can pass through multiple filter cartridges to filter the particulate dust in the flue gas, thereby reducing the content of particulate dust in the flue gas, and the installation sleeve and the filter cartridge are arranged at the connection between the connecting pipe and the boiler exhaust gas discharge. At this time, the flue gas temperature is relatively high, and the sulfur trioxide contained in the flue gas will not condense into an aerosol form together with water vapor, and will not adhere to the particulate dust. After the particulate dust in the flue gas is effectively filtered by the filter cartridge, the flue gas continues to flow along the connecting pipe to the air preheater body. During the process, the temperature of the flue gas decreases, and sulfur trioxide and water vapor condense into an aerosol form and exist in the flue gas. However, because the particulate dust in the flue gas is reduced, the sulfur trioxide and water vapor in the flue gas are difficult to adhere to the particulate dust and then adhere to the heating surface in the air preheater body, thereby further improving the anti-blocking treatment effect of the air preheater.

[0019] The filter cartridge on the mounting sleeve can be replaced, and the mounting sleeve and the filter tube can be pushed into the inner wall of the connecting tube, wherein a pair of baffles are aligned with the second limiting grooves provided on the mounting sleeve, and the other pair of baffles are aligned with the first limiting grooves provided on the filter tube, and the mounting sleeve and the filter tube are moved to the mounting sleeve. One side of the mounting sleeve and one side of the filter tube are respectively abutted against two pairs of positioning plates, and the two pairs of gear rods can be rotated. The block is wedge-shaped. When the mounting sleeve and filter tube are not installed, the gear rod is in a vertical state. After the mounting sleeve and filter tube are pushed into the inner wall of the connecting tube, the gear rod can be rotated. During the process of rotating the gear rod from the vertical direction to the horizontal direction, one side of the gear rod abuts against the inclined surface of the block. The continued rotation of the gear rod will drive the block to move along the slot. When the gear rod is rotated ninety degrees, the block rebounds under the action of the limit spring, driving the block to engage with one side of the gear rod, limiting the gear rod, and realizing the installation of the mounting sleeve and the filter tube, making the mounting sleeve and the filter tube more stable during use, and the disassembly structure is simple, which can realize the rapid installation and disassembly of the mounting sleeve and the filter tube, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments of the present invention and, together with the description, further serve to explain the principles of the present invention and enable those skilled in the relevant art to make and use the present invention.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the air preheater anti-blocking mechanism and the air preheater main body assembly;

[0022] Figure 2 It is a partially cutaway three-dimensional structural schematic diagram of the air preheater anti-blocking mechanism;

[0023] Figure 3 A schematic diagram of a partially cutaway three-dimensional structure of the connecting pipe, baffle and positioning plate assembly;

[0024] Figure 4 A partially cutaway three-dimensional schematic diagram of the assembly of the baffle, mounting rod and gear lever;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the particle dust filtering component;

[0026] Figure 6 A schematic diagram of a partially cutaway top view of the assembly of filter tubes, partitions and filter plates.

[0027] [Reference Signs]

[0028] 1. Air preheater body; 2. Connecting pipe; 3. Filter tube; 4. First limiting groove; 5. Air inlet; 6. Air outlet; 7. Partition plate; 8. Filter plate; 9. Mounting sleeve; 10. Filter cartridge; 11. Second limiting groove; 12. Baffle plate; 13. Mounting rod; 14. Fixing block; 15. Fixing rod; 16. Shift rod; 17. Limiting hole; 18. Slot; 19. Telescopic rod; 20. Block; 21. Limiting spring; 22. Positioning plate; 23. Mounting groove; 24. Speed ​​measuring probe.

[0029] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0030] The following is a detailed description of an air preheater anti-blocking mechanism provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0031] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0032] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0033] It is to be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0034] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0035] like Figures 1 to 6 As shown, the embodiment of the utility model provides an air preheater anti-blocking mechanism, including a connecting pipe 2 connected to the smoke inlet of the air preheater body 1, one end of the connecting pipe 2 is connected to the boiler exhaust outlet, the inner wall of the connecting pipe 2 is slidably connected with a filter tube 3, the filter tube 3 is provided with a first limiting groove 4, the two sides of the filter tube 3 are respectively provided with an air inlet 5 and an air outlet 6, the inner wall of the filter tube 3 is fixedly connected with a pair of partitions 7, the side walls of the partitions 7 are fixedly connected with a plurality of filter plates 8, the additives arranged in the filter plates 8 can react with sulfur dioxide carried in the flue gas, decompose the sulfur dioxide to reduce the sulfur dioxide content in the flue gas, thereby reducing the effect of sulfur dioxide on the heat inside the air preheater body 1 In order to prevent corrosion on the surface, one side of the filter plate 8 is connected to the inner wall of the filter tube 3, and a mounting groove 23 is provided on one side of the inner wall of the connecting tube 2; a particle dust filtering assembly is also provided in the connecting tube 2, and the particle dust filtering assembly is used to filter the particle dust in the flue gas entering the connecting tube 2, and the particle dust filtering assembly is detachably connected to the inner wall of the connecting tube 2; a fixing assembly is also provided on the inner wall of the connecting tube 2, and the fixing assembly is used to clamp and fix the particle dust filtering assembly and the filter tube 3, and the fixing assembly is connected to the inner wall of the connecting tube 2; a detection assembly is also provided on the inner wall of the connecting tube 2, and the detection assembly is used to detect the flow rate of the flue gas after filtering, and the detection assembly is connected to the inner wall of the connecting tube 2.

[0036] By using the filter plate 8 and the filter tube 3 in coordination, the boiler exhaust gas is discharged into the connecting pipe 2, and the flue gas filtered by the particle dust filter assembly enters the filter tube 3 from the air inlet 5. A pair of partitions 7 divide the filter tube 3 into an S-shaped space in the filter tube 3. The flue gas flows along the S-shaped space in the filter tube 3, thereby extending the contact time with the filter plate 8 and improving the filtering effect of the filter plate 8 on sulfur dioxide in the flue gas. The additives arranged in the filter plate 8 can react with the sulfur dioxide carried in the flue gas, decompose the sulfur dioxide and reduce the sulfur dioxide content in the flue gas, thereby reducing the corrosion of the heating surface in the air preheater body 1 by sulfur dioxide, and avoiding the blockage of the air preheater caused by the corrosion of the heating surface by sulfur dioxide.

[0037] like Figure 2 and Figure 5 As shown, the particle dust filtering assembly includes a mounting sleeve 9 slidably connected to the inner wall of the connecting pipe 2 , a plurality of filter cartridges 10 are fixedly connected to the mounting sleeve 9 , and second limiting grooves 11 are provided on both sides of the mounting sleeve 9 .

[0038] By means of the filter cartridge 10, when the flue gas is discharged into the connecting pipe 2, the particulate dust in the flue gas can be filtered through multiple filter cartridges 10 during use, thereby reducing the content of particulate dust in the flue gas. The mounting sleeve 9 and the filter cartridge 10 are arranged at the connection between the connecting pipe 2 and the exhaust gas discharge of the boiler. At this time, the flue gas temperature is relatively high, and the sulfur trioxide contained in the flue gas will not condense into an aerosol form together with water vapor, and will not adhere to the particulate dust. After the particulate dust in the flue gas is effectively filtered through the filter cartridge 10, the flue gas continues to flow along the connecting pipe 2 to the air preheater body 1. During this process, the temperature of the flue gas is reduced, and sulfur trioxide and water vapor condense into an aerosol form and exist in the flue gas. However, because the particulate dust in the flue gas is reduced, the sulfur trioxide and water vapor in the flue gas are difficult to adhere to the particulate dust and then adhere to the heating surface in the air preheater body 1, thereby further improving the anti-blocking treatment effect of the air preheater.

[0039] like Figures 2 to 4As shown, the fixing assembly includes two pairs of baffles 12 fixedly connected to the inner wall of the connecting tube 2, the two pairs of baffles 12 are respectively fixedly connected to the two ends of the inner wall of the connecting tube 2, each pair of baffles 12 is respectively fixedly connected to the two sides of the inner wall of the connecting tube 2, each baffle 12 is fixedly connected to a mounting rod 13, each mounting rod 13 is rotatably connected to a shift rod 16, a limiting hole 17 is provided on the shift rod 16, a slot 18 is provided on the baffle 12, one side of the inner wall of the slot 18 is fixedly connected to one end of a telescopic rod 19, the other end of the telescopic rod 19 is fixedly connected to a stopper 20, one side of the inner wall of the slot 18 is fixedly connected to one end of a limiting spring 21, the other end of the limiting spring 21 is fixedly connected to one side of the stopper 20, the bottom of the stopper 20 abuts against the side wall of the shift rod 16, and one side of the two pairs of shift rods 16 abuts against one side of the mounting sleeve 9 and one side of the filter tube 3 respectively. Two pairs of positioning plates 22 are fixedly connected to the inner wall of the connecting tube 2, and the positions of the two pairs of positioning plates 22 are respectively located near the middle position of the inner wall of the connecting tube 2, and each pair of positioning plates 22 is respectively fixedly connected to the two sides of the inner wall of the connecting tube 2. The installation position sequence of the two pairs of baffles 12 and the two pairs of positioning plates 22 on the inner wall of the connecting tube 2 is as follows: a pair of baffles 12, a pair of positioning plates 22, a pair of positioning plates 22 and a pair of baffles 12 are installed in sequence from one end of the connecting tube 2, and one side of the two pairs of positioning plates 22 abuts against the other side of the mounting sleeve 9 and the other side of the filter tube 3 respectively. The detection component includes a speed measuring probe 24 rotatably connected to the inner wall of the mounting groove 23, and a sensor is provided on the connecting tube 2. The speed measuring probe 24 is electrically connected to the sensor. The speed measuring probe 24 is a component of the hot wire anemometer in the prior art, and the hot wire anemometer also includes an amplifier, an output circuit, a power supply and a display device.

[0040] When the filter element 10 is in the air filter 20, the filter element 10 is in the air filter 20, and the filter element 10 is in the air filter 20. When the filter element 10 is in the air filter 20, the filter element 10 is in the air filter 20. When the filter element 10 is in the air filter 20, the filter element 10 is in the air filter 20. When the filter element 10 is in the air filter 20, the filter element 10 is in the air filter 20. The two pairs of stoppers 20 are respectively abutted against the two pairs of positioning plates 22, and the two pairs of stoppers 16 can be rotated. The stoppers 20 are wedge-shaped structures. When the installation sleeve 9 and the filter tube 3 are not installed, the stoppers 16 are in a vertical state. After the installation sleeve 9 and the filter tube 3 are pushed into the inner wall of the connecting tube 2, the stoppers 16 are rotated. During the process of the stoppers 16 rotating from the vertical direction to the horizontal direction, one side of the stoppers 16 abuts against the inclined surface of the stoppers 20. The stoppers 16 continue to rotate and drive the stoppers 20 to move along the slots 18. When the stoppers 16 rotate ninety degrees, the stoppers 20 rebound under the action of the limit springs 21 and drive the stoppers 20 to engage with one side of the stoppers 16, limiting the stoppers 16, and realizing the installation of the installation sleeve 9 and the filter tube 3. This makes the installation sleeve 9 and the filter tube 3 more stable during use, and the disassembly structure is simple, which can realize the rapid installation and disassembly of the installation sleeve 9 and the filter tube 3, thereby improving the work efficiency.

[0041] like Figure 4 As shown, the mounting rod 13 includes a fixed rod 15 and a fixed block 14 connected to each other. One end of the fixed rod 15 is fixedly connected to one side of the baffle 12. The cross-section of the fixed rod 15 is a semicircular structure, and the limiting hole 17 is a three-quarter circular structure. The limiting hole 17 set on the gear lever 16 is a three-quarter circular structure and cooperates with the fixed rod 15 with a semicircular structure to limit the rotation of the gear lever 16 so that the gear lever 16 can only rotate ninety degrees, thereby improving work efficiency.

[0042] like Figure 4 As shown, arc grooves are provided on both sides of the gear lever 16 , and the arc grooves are provided to facilitate the user to rotate the gear lever 16 , thereby improving the comfort when the gear lever 16 is rotated.

[0043] like Figure 4As shown, the cross-section of the stopper 20 is a wedge-shaped structure, and the flat side of the stopper 20 abuts against one side of the stopper rod 16 to limit the stopper rod 16. When the installation sleeve 9 and the filter tube 3 are installed, when the installation sleeve 9 and the filter tube 3 are not installed, the stopper rod 16 is in a vertical state. After the installation sleeve 9 and the filter tube 3 are pushed into the inner wall of the connecting tube 2, the stopper rod 16 can be rotated. During the process of rotating the stopper rod 16 from the vertical direction to the horizontal direction, one side of the stopper rod 16 abuts against the inclined surface of the stopper 20. The continued rotation of the stopper rod 16 will drive the stopper 20 to move along the slot 18. After the stopper rod 16 rotates ninety degrees, the stopper 20 rebounds under the action of the limit spring 21, driving the stopper 20 to engage with one side of the stopper rod 16, limiting the stopper rod 16, and realizing the installation of the installation sleeve 9 and the filter tube 3, so that the installation sleeve 9 and the filter tube 3 are more stable during use.

[0044] like Figure 6 As shown, the partition 7 is of a U-shaped structure, the air inlet 5 and the air outlet 6 are staggered on the filter tube 3, and the air inlet 5, the air outlet 6 and the partition 7 cooperate with each other to divide the filter tube 3 into an S-shaped space. The flue gas flows along the S shape in the filter tube 3, which prolongs the contact time with the filter plate 8 and improves the filtering effect of the filter plate 8 on sulfur dioxide in the flue gas.

[0045] The working principle provided by the utility model is that the boiler tail gas is discharged into the connecting pipe 2, and the flue gas filtered by the particle dust filtering component enters the filter tube 3 from the air inlet 5. A pair of partitions 7 divides the filter tube 3 into an S-shaped space in the filter tube 3. The flue gas flows along the S-shaped space in the filter tube 3, prolonging the contact time with the filter plate 8, and improving the filtering effect of the filter plate 8 on sulfur dioxide in the flue gas. The additives arranged in the filter plate 8 can react with the sulfur dioxide carried in the flue gas, decompose the sulfur dioxide and reduce the content of sulfur dioxide in the flue gas, thereby reducing the corrosion of sulfur dioxide on the heating surface in the air preheater body 1, avoiding the blockage problem of the air preheater caused by the corrosion of the heating surface by sulfur dioxide, and the flue gas is discharged into the connecting pipe 2, the particulate dust in the flue gas can be filtered through multiple filter cartridges 10, reducing the content of particulate dust in the flue gas, and the installation sleeve 9 and the filter cartridge 10 are arranged at the connection between the connecting pipe 2 and the exhaust gas discharge of the boiler. At this time, the flue gas temperature is relatively high, and the sulfur trioxide contained in the flue gas will not condense into an aerosol form together with the water vapor, and will not adhere to the particulate dust. After the particulate dust in the flue gas is effectively filtered through the filter cartridge 10, the flue gas continues to flow along the connecting pipe 2 to the air preheater body 1. During this process, the temperature of the flue gas is reduced, and the sulfur trioxide and water vapor condense into an aerosol form and exist in the flue gas. However, because the particulate dust in the flue gas is reduced, the sulfur trioxide and water vapor in the flue gas are difficult to adhere to the particulate dust and then adhere to The heating surface in the air preheater body 1 further improves the anti-blocking treatment effect of the air preheater. When the speed measuring probe 24 detects that the air flow rate at the air outlet 6 is reduced to a certain extent, the filter cartridge 10 and the filter tube 3 in the connecting pipe 2 need to be replaced. The connecting pipe 2 is disassembled, and the stopper 20 can be pressed to move the stopper 20 into the card slot 18. When the stopper 20 no longer limits the gear lever 16, the gear lever 16 is rotated so that the gear lever 16 does not abut against one side of the installation sleeve 9 and one side of the filter tube 3. Multiple gear levers 16 are rotated to release the limitation of the installation sleeve 9 and the filter tube 3, and the installation sleeve 9 and the filter tube 3 are pulled out of the connecting pipe 2. The filter cartridge 10 on the installation sleeve 9 can be replaced, and the installation sleeve 9 and the filter tube 3 are pushed into The inner wall of the connecting tube 2, wherein a pair of baffles 12 are arranged are aligned with the second limiting groove 11 provided on the installation sleeve 9, and the other pair of baffles 12 are aligned with the first limiting groove 4 provided on the filter tube 3. The installation sleeve 9 and the filter tube 3 are moved to one side of the installation sleeve 9 and one side of the filter tube 3 respectively abut against the two pairs of positioning plates 22, and the two pairs of gear rods 16 can be rotated, and the block 20 is a wedge-shaped structure. When the installation sleeve 9 and the filter tube 3 are not installed, the gear rod 16 is in a vertical state. After the installation sleeve 9 and the filter tube 3 are pushed into the inner wall of the connecting tube 2, the gear rod 16 can be rotated. During the process of rotating the gear rod 16 from the vertical direction to the horizontal direction, one side of the gear rod 16 abuts against the inclined surface of the block 20. The continued rotation of the gear rod 16 will drive the block 20 to move along the slot 18.When the lever 16 rotates 90 degrees, the stopper 20 rebounds under the action of the limit spring 21, driving the stopper 20 to engage with one side of the lever 16, limiting the lever 16, and realizing the installation of the installation sleeve 9 and the filter tube 3, making the installation sleeve 9 and the filter tube 3 more stable during use, and the disassembly structure is simple, which can realize the rapid installation and disassembly of the installation sleeve 9 and the filter tube 3, and improve the work efficiency.

[0046] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An air preheater anti-blocking mechanism, characterized in that: It comprises a connecting pipe connected to the smoke inlet of the air preheater body, the inner wall of the connecting pipe is slidably connected with a filter tube, the filter tube is provided with a first limiting groove, the two sides of the filter tube are respectively provided with an air inlet and an air outlet, the inner wall of the filter tube is fixedly connected with a pair of partitions, the side walls of the partitions are fixedly connected with a plurality of filter plates, one side of the filter plate is connected to the inner wall of the filter tube, and one side of the inner wall of the connecting pipe is provided with a mounting groove; A particle dust filter assembly is also provided in the connecting pipe, and the particle dust filter assembly is used to filter the particle dust in the smoke entering the connecting pipe, and the particle dust filter assembly is detachably connected to the inner wall of the connecting pipe; The inner wall of the connecting pipe is also provided with a fixing assembly, and the fixing assembly is used to clamp and fix the particle dust filter assembly and the filter pipe, and the fixing assembly is connected to the inner wall of the connecting pipe; The inner wall of the connecting pipe is also provided with a detection component, and the detection component is used to detect the flow rate of the flue gas after filtering, and the detection component is connected to the inner wall of the connecting pipe.

2. The air preheater anti-blocking mechanism according to claim 1, characterized in that: The particle dust filtering assembly comprises a mounting sleeve slidably connected to the inner wall of the connecting pipe, a plurality of filter cartridges are fixedly connected to the mounting sleeve, and second limiting grooves are provided on both sides of the mounting sleeve.

3. The air preheater anti-blocking mechanism according to claim 2, characterized in that: The fixing assembly includes two pairs of baffles fixedly connected to the inner wall of the connecting tube, each of the baffles is fixedly connected to a mounting rod, each of the mounting rods is rotatably connected to a gear rod, a limiting hole is provided on the gear rod, a slot is provided on the baffle, one side of the inner wall of the slot is fixedly connected to one end of the telescopic rod, the other end of the telescopic rod is fixedly connected to a block, one side of the inner wall of the slot is fixedly connected to one end of a limiting spring, the other end of the limiting spring is fixedly connected to one side of the block, the bottom of the block abuts against the side wall of the gear rod, one side of the two pairs of gear rods abuts against one side of the mounting sleeve and one side of the filter tube respectively, and two pairs of positioning plates are fixedly connected to the inner wall of the connecting tube, one side of the two pairs of positioning plates abuts against the other side of the mounting sleeve and the other side of the filter tube respectively.

4. The air preheater anti-blocking mechanism according to claim 1, characterized in that: The detection assembly comprises a speed measuring probe rotatably connected to the inner wall of the mounting groove, a sensor is arranged on the connecting pipe, and the speed measuring probe is electrically connected to the sensor.

5. The air preheater anti-blocking mechanism according to claim 3, characterized in that: The mounting rod comprises a fixed rod and a fixed block connected to each other, one end of the fixed rod is fixedly connected to one side of the baffle, and the cross section of the fixed rod is a semicircular structure.

6. The air preheater anti-blocking mechanism according to claim 3, characterized in that: The limiting hole is in a three-quarter circle structure.

7. The air preheater anti-blocking mechanism according to claim 3, characterized in that: Arc grooves are arranged on both sides of the gear lever.

8. The air preheater anti-blocking mechanism according to claim 3, characterized in that: The cross section of the stopper is a wedge-shaped structure, and a flat surface of the stopper abuts against one side of the stopper rod.

9. The air preheater anti-blocking mechanism according to claim 1, characterized in that: The partition is in a U-shaped structure.

10. The air preheater anti-blocking mechanism according to claim 1, characterized in that: The air inlet and the air outlet are staggered on the filter tube.

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