Wide channel plate air preheater with self-cleaning function

Abstract

The present application provides a kind of self-cleaning function wide runner plate type air preheater, it is related to air preheater equipment technical field, including sleeve and main shaft, the both ends of the sleeve are equipped with intercommunication component, the intercommunication component includes clamping cover one and clamping cover two, support assembly is installed on the intercommunication component, the support assembly includes side sleeve one and side sleeve two, torsion assembly is installed on the side sleeve one, the torsion assembly includes motor one and prism, push-pull assembly is installed on the side sleeve two, the self-cleaning function wide runner plate type air preheater can make that helical plate one and helical plate two are back and forth helical rotation in the inside of sleeve, slider is driven scraper under the limit of sliding groove, and back and forth scraping is carried out on the outside of helical plate one and helical plate two, the soot on helical plate one and helical plate two is scraped off, can effectively carry out dust removal work to helical wide runner plate type heat exchange structure, avoid smoke dust to influence heat exchange efficiency, it is suitable for using waste heat of flue gas to heat air and use.

Description

Technical Field

[0001] This invention relates to the field of air preheater equipment technology, specifically to a wide-channel plate air preheater with self-cleaning function. Background Technology

[0002] To improve combustion efficiency and reduce energy waste, air preheaters are often used to heat the air with heat from the flue gas. Patent application CN201910498171.4 discloses a tubular air preheater that prevents ammonium bisulfate blockage. By dividing the heat exchange area within the tubular air preheater into zones to increase the temperature and decompose ammonium bisulfate, blockage can be cleared online at each load level. Furthermore, the primary hot air temperature, secondary hot air temperature, and flue gas temperature are not significantly different from the design values, thus avoiding adverse effects on boiler combustion and the subsequent dust collector. Patent application CN202010750602.4 discloses a pulverized coal boiler. The air preheater anti-clogging heat exchange device increases the outlet flue gas temperature and the inlet secondary air temperature. It effectively alleviates air preheater blockage caused by ammonium bisulfate, and heat exchange with the flue gas at the induced draft fan inlet, effectively reducing the boiler exhaust temperature and ensuring boiler efficiency. According to the publicly available technical solutions, existing air preheater equipment has several drawbacks. First, it cannot effectively clean the dust adhering to the air preheater, easily affecting heat exchange efficiency. Second, it cannot adjust the flow rate and ratio of flue gas and air according to the flue gas temperature and the required air heating temperature, easily leading to heat waste or insufficient air heating. Third, it cannot effectively clean the ventilation mechanisms connected to both ends of the air preheater, easily reducing ventilation speed due to dust accumulation, which is detrimental to ensuring the air preheater's operating efficiency. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a wide-channel plate air preheater with self-cleaning function to solve the problems mentioned in the background art. This invention has a novel structure, multiple functions, and is suitable for using the waste heat of flue gas to heat air.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a self-cleaning wide-channel plate-type air preheater, comprising a sleeve and a main shaft, with connecting components installed at both ends of the sleeve, the connecting components comprising a first retaining cover and a second retaining cover, a support component installed on the connecting components, the support component comprising a first side sleeve and a second side sleeve, a torsion component installed on the first side sleeve, the torsion component comprising a first motor and a prism, a push-pull component installed on the second side sleeve, the push-pull component comprising a second motor and a lead screw, a flow channel component installed on the main shaft, the flow channel component comprising a first spiral plate and a second spiral plate, an isolation component installed on the flow channel component, the isolation component comprising a sliding plate and a baffle, a dust removal component installed on the sleeve, the dust removal component comprising a slider and a scraper, and a connecting component installed on the first retaining cover, the connecting component comprising an inner cylinder and a partition.

[0005] Furthermore, the first side sleeve is installed on the outer side of one end of the sleeve, the second side sleeve is installed on the outer side of the other end of the sleeve, one end of the first retainer is welded to the outer side of one end of the sleeve, the other end of the first retainer is fitted onto the outer side of the first side sleeve, one end of the second retainer is welded to the outer side of the other end of the sleeve, the other end of the second retainer is welded to the outer side of the second side sleeve, the first motor is installed on the outer side of the first side sleeve by bolts, and the second motor is installed on the outer side of the second side sleeve by bolts.

[0006] Furthermore, the inner cylinder includes an inner cylinder one and an inner cylinder two. The two ends of the inner cylinder one are respectively installed on the outer side of the sleeve and the outer side of the side sleeve one through sealing rings. The two ends of the inner cylinder two are respectively installed on the other end of the sleeve and the outer side of the side sleeve two through sealing rings.

[0007] Furthermore, one end of the main shaft is installed inside the first side sleeve, and the other end of the main shaft passes through the first inner cylinder, the sleeve, and the second inner cylinder in sequence and extends to the inside of the second side sleeve. One end of the main shaft is provided with a rib groove, one end of the prism is keyed to the output shaft of the first motor, and the other end of the prism passes through the first side sleeve through a sealing ring and is locked inside the rib groove. One end of the lead screw is keyed to the output shaft of the second motor, and the other end of the lead screw passes through the second side sleeve through a sealing ring and is threaded to the inside of the other end of the main shaft.

[0008] Furthermore, both the spiral plate one and the sliding plate are welded to the outer side of the main shaft. The outer side of the spiral plate one is respectively clamped to the inner wall of the sleeve and the inner cylinder. One end of the sliding plate is welded to both ends of the spiral plate one. The inner side of the inner cylinder is provided with a seal. The other ends of the two sliding plates pass through the seal and extend to the outer side of the side sleeve one and the side sleeve two. The two ends of the spiral plate two and the baffle are respectively welded to the inner wall of the inner cylinder. The two baffles are respectively welded to the two ends of the spiral plate two. The spiral plate two and the baffles are both clamped to the inner side of the main shaft. The spiral spacing of the spiral plate one and the spiral plate two is equal. The spiral plate one and the sliding plates at both ends and the spiral plate two and the baffles at both ends separate the sleeve and the inner cylinder into wide flow channel one and wide flow channel two. The wide flow channel one and the wide flow channel two exchange heat through the spiral plate one and the spiral plate two. Both the spiral plate one and the spiral plate two are spiral heat-conducting plates.

[0009] Furthermore, spacer ring one and spacer ring two are welded to the outer sides of both ends of the inner cylinder, and there are two sets of spacer ring one and spacer ring two. The outer sides of the two sets of spacer ring one and spacer ring two are respectively clamped to the inner walls of the cover one and cover two by sealing rings. The outer side of the partition is welded to the outer side of the inner cylinder, one side of spacer ring one and the other side of spacer ring two, and the partition separates spacer ring one and spacer ring two into annular cavity one and annular cavity two.

[0010] Furthermore, air inlets and smoke outlets are respectively provided on both sides of the inner cylinder, a connecting opening is provided on the first partition ring, a side opening is provided on the second partition ring, an air inlet pipe is welded to the top of one end of the first cover, a smoke outlet pipe is welded to the bottom of the other end of the first cover, an air outlet pipe is welded to the top of one end of the second cover, and a smoke inlet pipe is welded to the bottom of the other end of the second cover.

[0011] Furthermore, the air inlet pipe is connected to the air outlet pipe via the inner side of one end of the first cover, the side opening, the first annular cavity, the air inlet, the first wide flow channel, the air inlet, the first annular cavity, the side opening, and the inner side of one end of the second cover in sequence. The smoke inlet pipe is connected to the smoke outlet pipe via the inner side of the other end of the second cover, the connecting opening, the second annular cavity, the smoke inlet, the second wide flow channel, the smoke inlet, the second annular cavity, the connecting opening, and the inner side of the other end of the first cover in sequence.

[0012] Furthermore, temperature sensors are installed on both the air outlet pipe and the smoke outlet pipe, and scraper strips are welded to the outer sides of both the first and second partition rings. The outer sides of the scraper strips are respectively clamped on the inner walls of the first and second cover, the outer side of the sleeve, the outer side of the first side sleeve, and the outer side of the second side sleeve.

[0013] Furthermore, a groove is provided on the inner wall of the top of the sleeve, the slider is locked inside the groove, the top of the scraper is welded to the bottom of the slider, the bottom of the scraper extends to the outer side of the main shaft, and the scraper is locked on both sides of the spiral plate one and the spiral plate two respectively.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. In use, the self-cleaning wide-channel plate air preheater introduces air into the inlet pipe, then sequentially through the inner side of one end of the first cover, the side opening, the first annular cavity, and the air inlet into one end of the wide-channel one. It then spirals from right to left within the wide-channel one, and then through the air inlet, the first annular cavity, the side opening, and the inner side of one end of the second cover into the outlet pipe. Flue gas is then introduced into the flue gas inlet pipe, and sequentially through the inner side of the other end of the second cover, the connecting opening, the second annular cavity, and the flue gas inlet into the inner side of the wide-channel two. It then spirals from left to right within the wide-channel two, allowing the air in the wide-channel one to exchange heat with the flue gas in the wide-channel two through the spiral plates one and two. The temperature of the flue gas gradually decreases, while the temperature of the air gradually increases. When the spiral plates... When a large amount of soot adheres to the first and second spiral plates, the first motor is turned on. The first motor drives the main shaft to rotate back and forth through the prism. The main shaft drives the first spiral plate and the slide plate. The slide plate drives the inner cylinder, the first partition ring, and the second partition ring to rotate. The partition rings keep the first and second annular cavities separated to prevent gas exchange. The inner cylinder drives the second spiral plate to rotate, which in turn causes the first and second spiral plates to rotate back and forth inside the sleeve. The slider, limited by the slide groove, drives the scraper to scrape back and forth on the outer sides of the first and second spiral plates, removing the soot and dust from the spiral plates and carrying it away with the airflow. This effectively cleans the spiral-shaped wide-channel plate heat exchange structure and prevents soot from affecting the heat exchange efficiency.

[0016] 2. During operation, this self-cleaning wide-channel plate air preheater uses temperature sensors to measure the temperature of both the heated air and the cooled flue gas. When the temperature of the heated air is insufficient or the temperature of the discharged flue gas is too high, motor two is activated. Motor two drives the main shaft via a lead screw, which in turn moves the spiral plate one and the slide plate to the left or right. The slide plate can move left and right through the seal under the inner cylinder's seal. Spiral plate two is fixed by the inner cylinder, and the main shaft can move left and right inside spiral plate two and the baffle, thereby reducing the width of wide channel one and increasing the width of wide channel two (or reducing the width of wide channel two and increasing the width of wide channel one). This, in turn, reduces the air flow rate and increases the flue gas flow rate (or reduces the flue gas flow rate and increases the air flow rate), ensuring that the temperature of the heated air meets the requirements and fully recovering the heat from the flue gas, thus reducing energy waste.

[0017] 3. When the self-cleaning wide-channel plate air preheater cleans the spiral plates 1 and 2, the inner cylinder synchronously drives the partition rings 1 and 2 to rotate back and forth. Both partition rings 1 and 2 drive the scraper to rotate back and forth. The scraper scrapes off the dust on the inner walls of the cover 1 and cover 2, the outer side of the sleeve, the outer side of side sleeve 1, and the outer side of side sleeve 2. The dust is blown by the flue gas flow to the inner side of the flue gas outlet pipe and discharged outward. This automatically cleans the channels at both ends of the heat exchange structure, preventing the airflow speed from being reduced due to dust adhesion and ensuring the working efficiency of the heat exchange structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a wide-channel plate air preheater with self-cleaning function according to the present invention;

[0019] Figure 2 This is a cross-sectional view of a wide-channel plate air preheater with self-cleaning function according to the present invention.

[0020] Figure 3 This is a schematic diagram of the sleeve structure of a wide-channel plate air preheater with self-cleaning function according to the present invention;

[0021] Figure 4 This is a schematic diagram of the main shaft of a wide-channel plate air preheater with self-cleaning function according to the present invention.

[0022] Figure 5 This is a schematic diagram of the inner cylinder of a wide-channel plate air preheater with self-cleaning function according to the present invention;

[0023] Figure 6 This is a schematic diagram of the scraper structure of a wide-channel plate air preheater with self-cleaning function according to the present invention;

[0024] In the diagram: 1. Sleeve; 2. Clamping cover one; 3. Clamping cover two; 4. Inlet pipe; 5. Outlet pipe; 6. Smoke outlet pipe; 7. Smoke inlet pipe; 8. Side sleeve one; 9. Motor one; 10. Side sleeve two; 11. Motor two; 12. Main shaft; 13. Prism; 14. Lead screw; 15. Spiral plate one; 16. Spiral plate two; 17. Slide plate; 18. Baffle; 19. Slide groove; 20. Slider; 21. Scraper; 22. Inner cylinder; 23. Spacer ring one; 24. Spacer ring two; 25. Sealing; 26. Partition plate; 27. Air inlet; 28. Side opening; 29. ​​Smoke outlet; 30. Connecting opening; 31. Temperature sensor; 32. Scraper strip. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0026] Please see Figures 1 to 6This invention provides a technical solution: a self-cleaning wide-channel plate-type air preheater, comprising a sleeve 1 and a main shaft 12. Both ends of the sleeve 1 are equipped with connecting components, each including a first retainer 2 and a second retainer 3. A support component is mounted on the connecting components, comprising a first side sleeve 8 and a second side sleeve 10. A torsion component is mounted on the first side sleeve 8, comprising a first motor 9 and a prism 13. A push-pull component is mounted on the second side sleeve 10, comprising a second motor 11 and a lead screw 14. A flow channel component is mounted on the main shaft 12, comprising a first spiral plate 15 and a second spiral plate 16. An isolation component is mounted on the flow channel component, comprising a slide plate 17 and a baffle 18. A dust removal assembly is installed on the sleeve 1, the dust removal assembly including a slider 20 and a scraper 21. A connecting assembly is installed on the retaining cover 2, the connecting assembly including an inner cylinder 22 and a partition 26. A side sleeve 8 is installed on the outer side of one end of the sleeve 1, and a side sleeve 20 is installed on the outer side of the other end of the sleeve 1. One end of the retaining cover 2 is welded to the outer side of one end of the sleeve 1, and the other end of the retaining cover 2 is fitted onto the outer side of the side sleeve 8. One end of the retaining cover 2 is welded to the outer side of the other end of the sleeve 1, and the other end of the retaining cover 2 is welded to the outer side of the side sleeve 20. A motor 9 is installed on the outer side of the side sleeve 8 by bolts, and a motor 11 is installed on the outer side of the side sleeve 20 by bolts. The inner cylinder 22... The system includes an inner cylinder 1 and an inner cylinder 2. The two ends of the inner cylinder 1 are respectively installed on the outer sides of the sleeve 1 and the side sleeve 10 via sealing rings. The two ends of the inner cylinder 2 are respectively installed on the other end of the sleeve 1 and the outer side of the side sleeve 10 via sealing rings. One end of the main shaft 12 is installed inside the side sleeve 8, and the other end of the main shaft 12 passes through the inner cylinder 1, sleeve 1, and inner cylinder 2 sequentially, extending to the inner side of the side sleeve 10. One end of the main shaft 12 has a groove. One end of the prism 13 is keyed to the output shaft of the motor 9, and the other end of the prism 13 passes through the side sleeve 8 via a sealing ring and is secured inside the groove. One end of the lead screw 14 is keyed to the output shaft of the motor 11, and the other end of the lead screw 14 passes through the side sleeve 10 via a sealing ring. The air outlet pipe 5 is equipped with a temperature sensor 31 and is threaded onto the inner side of the other end of the main shaft 12. Scraper blades 32 are welded to the outer sides of both the first partition ring 23 and the second partition ring 24. The outer sides of the scraper blades 32 are located on the inner walls of the first and second partition covers 3, the outer side of the sleeve 1, the outer side of the first side sleeve 8, and the outer side of the second side sleeve 10. During the cleaning of the spiral plates 15 and 16, the inner cylinder 22 synchronously drives the first and second partition rings 23 and 24 to rotate back and forth. Both the first and second partition rings 23 and 24 drive the scraper blades 32 to rotate back and forth. The scraper blades 32 scrape away the dust from the inner walls of the first and second partition covers 3, the outer side of the sleeve 1, the outer side of the first side sleeve 8, and the outer side of the second side sleeve 10.The flue gas blows the material to the inside of the exhaust pipe 6 and discharges it outwards, thus automatically cleaning the channels at both ends of the heat exchange structure. This prevents the airflow velocity from decreasing due to dust accumulation, ensuring the working efficiency of the heat exchange structure.

[0027] In this embodiment, the spiral plate 15 and the sliding plate 17 are both welded to the outer side of the main shaft 12. The outer side of the spiral plate 15 is respectively clamped onto the inner wall of the sleeve 1 and the inner cylinder 22. One end of the sliding plate 17 is welded to both ends of the spiral plate 15. A sealing opening 25 is provided on the inner side of the inner cylinder 22. The other ends of the two sliding plates 17 pass through the sealing opening 25 and extend to the inner side of the side sleeve 1 and the side sleeve 2 10. The two ends of the spiral plate 2 16 and the baffle 18 are respectively welded to the inner wall of the inner cylinder 22. The two baffles 18 are respectively welded to the two ends of the spiral plate 2 16. The spiral plate 2 16 and the baffles 18 are both clamped onto the outer side of the main shaft 12. The spiral plate 15 and the spiral plate 16 are respectively clamped onto the outer side of the main shaft 12. The spiral spacing of the second plate 16 is equal. The spiral plate 15 and the slide plates 17 at both ends, together with the baffles 18 at both ends of the spiral plate 16, separate the sleeve 1 and the inner cylinder 22 into wide flow channels one and two. The wide flow channels one and two exchange heat through the spiral plate 15 and the spiral plate 16. Both the spiral plate 15 and the spiral plate 16 are spiral heat-conducting plates. The air inlet pipe 4 is connected to the air outlet pipe 5 by passing through the inner side of one end of the cover 2, the side opening 28, the first annular cavity, the air inlet 27, the wide flow channel one, the air inlet 27, the first annular cavity, the side opening 28, and the inner side of one end of the cover 3. The smoke inlet pipe 7 is connected to the smoke outlet pipe 7 by passing through the inner side of the other end of the cover 3, the connecting opening 30, the second annular cavity, and the smoke outlet pipe 5. The inner side of the other end of the nozzle 29, wide flow channel 2, smoke outlet 29, annular cavity 2, connecting outlet 30, and retainer 2 is connected to the smoke outlet pipe 6. A groove 19 is provided on the inner wall of the top of the sleeve 1. The slider 20 is locked inside the groove 19. The top of the scraper 21 is welded to the bottom of the slider 20. The bottom of the scraper 21 extends to the outer side of the main shaft 12. The scraper 21 is respectively locked on both sides of the spiral plate 15 and the spiral plate 26. During use, the temperature sensor 31 measures the temperature of the heated air and the cooled flue gas. When the temperature of the heated air is insufficient or the temperature of the discharged flue gas is too high, the motor 21 is turned on. The motor 21 passes through the wire Rod 14 drives main shaft 12, which in turn drives spiral plate 15 and slide plate 17 to move left or right. Slide plate 17 can move left and right through seal 25 under the seal of inner cylinder 22. Spiral plate 16 is fixed by inner cylinder 22. Main shaft 12 can move left and right inside spiral plate 16 and baffle 18, thereby reducing the width of wide flow channel 1 and increasing the width of wide flow channel 2 (or reducing the width of wide flow channel 2 and increasing the width of wide flow channel 1), thereby reducing the air flow and increasing the flue gas flow (or reducing the flue gas flow and increasing the air flow) to ensure that the temperature of the heated air meets the requirements and fully recovers the heat in the flue gas, reducing energy waste.

[0028] In this embodiment, spacer ring 1 23 and spacer ring 24 are welded to the outer sides of both ends of the inner cylinder 22, respectively. There are two sets of spacer ring 1 23 and spacer ring 24. The outer sides of the two sets of spacer ring 1 23 and spacer ring 24 are respectively secured to the inner walls of cover 1 2 and cover 2 3 by sealing rings. The outer sides of the partition plate 26 are welded to the outer side of the inner cylinder 22, one side of spacer ring 1 23, and the other side of spacer ring 24. The partition plate 26 divides spacer ring 1 23 and spacer ring 24 into annular cavity 1 and annular cavity 2. Air inlets 27 and smoke outlets 29 are respectively opened on both sides of the inner cylinder 22. Spacer ring 1 23 is provided with The device has a connecting port 30. A side port 28 is provided on the second partition ring 24. An air inlet pipe 4 is welded to the top of one end of the first cover 2, and a smoke outlet pipe 6 is welded to the bottom of the other end of the first cover 2. An air outlet pipe 5 is welded to the top of one end of the second cover 3, and an air inlet pipe 7 is welded to the bottom of the other end of the second cover 3. In use, air is introduced into the air inlet pipe 4, and then sequentially passes through the inner side of one end of the first cover 2, the side port 28, the first annular cavity, and the air inlet 27 to enter one end of the first wide flow channel. It then spirals from right to left within the first wide flow channel, and finally passes through the air inlet 27, the first annular cavity, the side port 28, and the inner side of one end of the second cover 3 to enter the air outlet pipe. Within 5, the flue gas is introduced into the inlet pipe 7, and then sequentially enters the inner side of the other end of the cover 2 3, the connecting port 30, the annular cavity 2, and the flue gas outlet 29 into the inner side of the wide flow channel 2. The flue gas then spirals from left to right within the wide flow channel 2, causing the air in the wide flow channel 1 to exchange heat with the flue gas in the wide flow channel 2 through the spiral plate 15 and the spiral plate 2 16. The temperature of the flue gas gradually decreases, while the temperature of the air gradually increases. When a significant amount of dust adheres to the spiral plate 15 and the spiral plate 2 16, the motor 19 is activated. The motor 19 drives the main shaft 12 to rotate back and forth via the prism 13. The main shaft 12 drives the spiral plate 15 and the sliding plate 17. The inner cylinder 22, partition ring 1 23, and partition ring 24 rotate, and the partition plate 26 keeps the annular cavity 1 and annular cavity 2 separated to prevent gas exchange. The inner cylinder 22 drives the spiral plate 2 16 to rotate, which in turn causes the spiral plate 1 15 and spiral plate 2 16 to rotate back and forth inside the sleeve 1. The slider 20, limited by the slide groove 19, drives the scraper 21 to scrape back and forth on the outer side of the spiral plate 15 and spiral plate 2 16, scraping off the dust on the spiral plate 15 and spiral plate 2 16 and carrying it away with the airflow. This can effectively clean the spiral wide-channel plate heat exchange structure and prevent dust from affecting the heat exchange efficiency.

[0029] This self-cleaning wide-channel plate air preheater provides power to all electrical equipment via an external power supply. During operation, air is introduced into the inlet pipe 4, then sequentially passes through the inner side of one end of the first cover 2, side opening 28, annular cavity 1, and air inlet 27 into one end of the wide-channel 1, where it spirals from right to left. It then passes through air inlet 27, annular cavity 1, side opening 28, and the inner side of one end of the second cover 3 into the outlet pipe 5. Flue gas is introduced into the flue gas inlet pipe 7, then sequentially passes through the inner side of the other end of the second cover 3, connecting opening 30, annular cavity 2, and flue gas inlet 29 into the inner side of the wide-channel 2, where it spirals from left to right. This allows the air in the wide-channel 1 to exchange heat with the flue gas in the wide-channel 2 through spiral plates 15 and 16, thus reducing the temperature of the flue gas. As the temperature gradually decreases and the air temperature gradually increases, when a significant amount of soot adheres to the spiral plates 15 and 16, motor 9 is turned on. Motor 9 drives the main shaft 12 to rotate back and forth via prism 13. The main shaft 12 drives the spiral plates 15 and slide plate 17. Slide plate 17 drives the inner cylinder 22, partition ring 23, and partition ring 24 to rotate, and the partition plate 26 maintains the separation between annular cavity 1 and annular cavity 2 to prevent gas exchange. The inner cylinder 22 drives the spiral plates 16 to rotate, thereby causing the spiral plates 15 and 16 to rotate back and forth inside the sleeve 1. Under the limit of the slide groove 19, the slider 20 drives the scraper 21 to scrape back and forth on the outer side of the spiral plates 15 and 16, removing the soot from the spiral plates 15 and 16. The dust is scraped off and carried away by the airflow, effectively cleaning the spiral-shaped wide-channel plate heat exchange structure and preventing dust from affecting heat exchange efficiency. Temperature sensor 31 measures the temperature of the heated air and the cooled flue gas. When the temperature of the heated air is insufficient or the temperature of the discharged flue gas is too high, motor 2 11 is turned on. Motor 2 11 drives the main shaft 12 through the lead screw 14. The main shaft 12 drives the spiral plate 15 and the slide plate 17 to move left or right. The slide plate 17 can move left and right through the seal 25 under the seal of the inner cylinder 22. The spiral plate 2 16 is fixed by the inner cylinder 22. The main shaft 12 can move left and right inside the spiral plate 2 16 and the baffle 18, thereby reducing the width of the wide channel 1 and increasing the width of the wide channel 2. The airflow rate is reduced and the flue gas flow rate is increased (or the flue gas flow rate is reduced and the airflow rate is increased) to ensure that the temperature of the heated air meets the requirements and to fully recover the heat in the flue gas, reducing energy waste. When cleaning the spiral plate 15 and spiral plate 16, the inner cylinder 22 synchronously drives the partition ring 23 and partition ring 24 to rotate back and forth. Both partition ring 23 and partition ring 24 drive the scraper 32 to rotate back and forth. The scraper 32 scrapes off the dust on the inner wall of the cover 12 and cover 23, the outer side of the sleeve 1, the outer side of the side sleeve 8 and the outer side of the side sleeve 20, and blown by the flue gas flow to the inner side of the flue pipe 6.It then discharges the pollutants outwards, automatically cleaning the channels at both ends of the heat exchange structure to prevent airflow velocity reduction due to dust accumulation and ensure the efficiency of the heat exchange structure.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A self-cleaning wide-channel plate-type air preheater, comprising a sleeve (1) and a main shaft (12), wherein a connecting assembly is installed at both ends of the sleeve (1), the connecting assembly comprising a first retaining cover (2) and a second retaining cover (3), characterized in that: A support assembly is installed on the connecting component. The support assembly includes a first side sleeve (8) and a second side sleeve (10). A torsion assembly is installed on the first side sleeve (8). The torsion assembly includes a first motor (9) and a prism (13). A push-pull assembly is installed on the second side sleeve (10). The push-pull assembly includes a second motor (11) and a lead screw (14). A flow channel assembly is installed on the main shaft (12). The flow channel assembly includes a first spiral plate (15) and a second spiral plate (16). An isolation assembly is installed on the flow channel assembly. The isolation assembly includes a slide plate (17) and a baffle (18). A dust removal assembly is installed on the sleeve (1). The dust removal assembly includes a slider (20) and a scraper (21). A cover is installed on the first cover (2). The device has an inner cylinder (22) and a partition (26). The spiral plate one (15) and the sliding plate (17) are both welded to the outer side of the main shaft (12). The outer side of the spiral plate one (15) is respectively clamped on the inner wall of the sleeve (1) and the inner cylinder (22). One end of the sliding plate (17) is respectively welded to both ends of the spiral plate one (15). The inner side of the inner cylinder (22) is provided with a seal (25). The other ends of the two sliding plates (17) pass through the seal (25) and extend to the inner side of the side sleeve one (8) and the side sleeve two (10). The two ends of the spiral plate two (16) and the baffle (18) are respectively welded to the inner wall of the inner cylinder (22). The two baffles (18) are respectively welded to the two ends of the spiral plate two (16). Both the baffle (18) and the main shaft (12) are clamped on the outer side. The spiral spacing of the first spiral plate (15) and the second spiral plate (16) is equal. The first spiral plate (15) and the slide plates (17) at both ends and the second spiral plate (16) and the baffles (18) at both ends separate the sleeve (1) and the inner cylinder (22) into a wide flow channel one and a wide flow channel two. The wide flow channel one and the wide flow channel two exchange heat through the first spiral plate (15) and the second spiral plate (16). The first spiral plate (15) and the second spiral plate (16) are both spiral heat-conducting plates. The outer sides of both ends of the inner cylinder (22) are respectively welded with a partition ring one (23) and a partition ring two (24). There are two sets of partition ring one (23) and partition ring two (24). The two sets of partition ring one (23) and partition ring two (24) are 2 sets. 3) The outer sides of the second partition ring (24) are respectively secured to the inner walls of the first cover (2) and the second cover (3) by sealing rings. The outer sides of the partition plate (26) are respectively welded to the outer side of the inner cylinder (22), one side of the first partition ring (23) and the other side of the second partition ring (24). The partition plate (26) separates the first partition ring (23) and the second partition ring (24) into annular cavity one and annular cavity two. The inner cylinder (22) has an air port (27) and a smoke port (29) on both sides respectively. The first partition ring (23) has a connecting port (30) and the second partition ring (24) has a side port (28). The top of one end of the first cover (2) is welded with an air inlet pipe (4) and the bottom of the other end of the first cover (2) is welded with a smoke outlet pipe (6).The top of one end of the second cover (3) is welded with an exhaust pipe (5), and the bottom of the other end of the second cover (3) is welded with an inlet pipe (7). The inlet pipe (4) passes through the inner side of one end of the first cover (2), the side opening (28), the first annular cavity, the air port (27), the first wide flow channel, the air port (27) of one end of the second cover (3), the first annular cavity, the side opening (28), and the inner side of one end of the second cover (3) to connect with the exhaust pipe (5). The inlet pipe (7) passes through the inner side of the other end of the second cover (3), the connecting port (30), the second annular cavity, the smoke port (29), the second wide flow channel, the smoke port (29) of one end of the first cover (2), the second annular cavity, the connecting port (30), and the inner side of the other end of the first cover (2) to connect with the exhaust pipe (6). Temperature sensors (31) are installed on both the exhaust pipe (5) and the smoke pipe (6). Scraper strips (32) are welded to the outer sides of the first partition ring (23) and the second partition ring (24). The outer sides of the scraper strips (32) are respectively on the inner walls of the first and second partition covers (2) and the second partition cover (3), the outer side of the sleeve (1), the outer side of the first side sleeve (8), and the outer side of the second side sleeve (10). A groove (19) is provided on the inner wall of the top of the sleeve (1). The slider (20) is locked inside the groove (19). The top of the scraper (21) is welded to the bottom of the slider (20). The bottom of the scraper (21) extends to the outer side of the main shaft (12). The scraper (21) is locked on both sides of the first spiral plate (15) and the second spiral plate (16).

2. The wide-channel plate air preheater with self-cleaning function according to claim 1, characterized in that: The first side sleeve (8) is installed on the outside of one end of the sleeve (1), the second side sleeve (10) is installed on the outside of the other end of the sleeve (1), one end of the first clip (2) is welded to the outside of one end of the sleeve (1), the other end of the first clip (2) is sleeved on the outside of the first side sleeve (8), one end of the second clip (3) is welded to the outside of the other end of the sleeve (1), the other end of the second clip (3) is welded to the outside of the second side sleeve (10), the first motor (9) is installed on the outside of the first side sleeve (8) by bolts, and the second motor (11) is installed on the outside of the second side sleeve (10) by bolts.

3. A wide-channel plate-type air preheater with self-cleaning function according to claim 2, characterized in that: The inner cylinder (22) includes an inner cylinder one and an inner cylinder two. The two ends of the inner cylinder one are respectively installed on the outer side of the sleeve (1) and the side sleeve one (8) through sealing rings. The two ends of the inner cylinder two are respectively installed on the other end of the sleeve (1) and the outer side of the side sleeve two (10) through sealing rings.

4. A wide-channel plate-type air preheater with self-cleaning function according to claim 3, characterized in that: One end of the main shaft (12) is installed inside the side sleeve (8). The other end of the main shaft (12) passes through the inner cylinder (1), sleeve (1) and inner cylinder (2) in sequence and extends to the inner side of the side sleeve (10). One end of the main shaft (12) is provided with a rib groove. One end of the prism (13) is keyed to the output shaft of the motor (9). The other end of the prism (13) passes through the side sleeve (8) through a sealing ring and is locked inside the rib groove. One end of the lead screw (14) is keyed to the output shaft of the motor (11). The other end of the lead screw (14) passes through the side sleeve (10) through a sealing ring and is installed inside the other end of the main shaft (12) by a thread.

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