Wide-runner plate type air pre-heater with self-cleaning function

Abstract

The invention provides a wide-runner plate type air pre-heater with a self-cleaning function, and relates to the technical field of air pre-heater equipment, the wide-runner plate type air pre-heater comprises a sleeve and a main shaft, communicating assemblies are installed at the two ends of the sleeve, each communicating assembly comprises a first clamping cover and a second clamping cover, a supporting assembly is installed on each communicating assembly, and each supporting assembly comprises a first side sleeve and a second side sleeve; the first side sleeve is provided with a torsion assembly, the torsion assembly comprises a first motor and a prism, the second side sleeve is provided with a push-pull assembly, and according to the wide-runner plate type air preheater with the self-cleaning function, the first spiral plate and the second spiral plate can spirally rotate back and forth on the inner side of the sleeve; the sliding blocks are limited by the sliding grooves to drive the scraping plates to conduct scraping back and forth on the outer side of the first spiral plate and the outer side of the second spiral plate, smoke dust on the first spiral plate and the second spiral plate is scraped off, the spiral wide-runner plate type heat exchange structure can be effectively subjected to dust removal work, and the smoke dust is prevented from affecting the heat exchange efficiency; the device is suitable for heating the air by using the waste heat of the flue gas.

Description

Technical Field

[0001] The invention relates to the technical field of air preheater equipment, in particular to a wide-channel plate-type air preheater with a self-cleaning function. Background Art

[0002] In order to improve combustion efficiency and reduce energy waste, it is often necessary to use an air preheater to heat the air with the heat in the flue gas. The invention patent with patent application number CN201910498171.4 discloses a tubular air preheater that can prevent ammonium bisulfate from clogging. By dividing the heat exchange area in the tubular air preheater and increasing the temperature to decompose ammonium bisulfate, each load section can be cleaned online for blockage, and the primary hot air temperature, secondary hot air temperature, and exhaust gas temperature are not much different from the design values, which will not cause adverse effects on boiler combustion and the subsequent dust collector of the air preheater. The invention patent with patent application number CN202010750602.4 discloses a pulverized coal boiler The air preheater anti-blocking heat exchange device increases the flue gas temperature at the air preheater outlet and the temperature of the secondary air entering the air preheater; it can effectively alleviate the air preheater blockage phenomenon caused by ammonium bisulfate, and heat exchanges the flue gas at the induced draft fan inlet, effectively reducing the exhaust temperature of the boiler and effectively ensuring the boiler efficiency. According to its disclosed technical solution, when using the existing air preheater equipment, on the one hand, it is not possible to effectively clean the dust attached to the air preheater, which can easily affect the heat exchange efficiency due to dust; on the other hand, it is not possible to adjust the flow rate and ratio of the flue gas and air according to the temperature of the flue gas and the required heating temperature of the air, which can easily cause heat waste or insufficient heating temperature of the air. On the other hand, it is not possible to effectively clean the ventilation mechanism connected to the two ends of the air preheater, which can easily reduce the ventilation speed due to dust accumulation, which is not conducive to ensuring the working efficiency of the air preheater. Summary of the Invention

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

[0004] In order to achieve the above-mentioned objectives, the present invention is implemented through the following technical solutions: a wide-channel plate-type air preheater with self-cleaning function, comprising a sleeve and a main shaft, connecting components are installed at both ends of the sleeve, the connecting components include card cover 1 and card cover 2, a supporting component is installed on the connecting component, the supporting component includes side sleeve 1 and side sleeve 2, a torsion component is installed on the side sleeve 1, the torsion component includes motor 1 and a prism, a push-pull component is installed on the side sleeve 2, the push-pull component includes motor 2 and a screw rod, a flow channel component is installed on the main shaft, the flow channel component includes spiral plate 1 and spiral plate 2, an isolation component is installed on the flow channel component, the isolation component includes a slide plate and a baffle, a dust cleaning component is installed on the sleeve, the dust cleaning component includes a slider and a scraper, a connecting component is installed on the card cover 1, and the connecting component includes an inner cylinder and a partition.

[0005] Furthermore, the side sleeve 1 is installed on the outside of one end of the sleeve, the side sleeve 2 is installed on the outside of the other end of the sleeve, one end of the card cover 1 is welded to the outside side of one end of the sleeve, the other end of the card cover 1 is sleeved on the outside side of the side sleeve 1, one end of the card cover 2 is welded to the outside side of the other end of the sleeve, the other end of the card cover 2 is welded to the outside side of the side sleeve 2, the motor 1 is installed on the outside side of the side sleeve 1 by bolts, and the motor 2 is installed on the outside side of the side sleeve 2 by bolts.

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

[0007] Furthermore, one end of the main shaft is installed on the inner side of side sleeve one, and the other end of the main shaft passes through inner cylinder one, sleeve and inner cylinder two in sequence and extends to the inner side of side sleeve two. A prism is opened at one end of the main shaft, one end of the prism is keyed to the output shaft of motor one, and the other end of the prism passes through side sleeve one through a sealing ring and is stuck on the inner side of the prism groove, one end of the screw rod is keyed to the output shaft of motor two, and the other end of the screw rod passes through side sleeve two through a sealing ring and is installed on the inner side of the other end of the main shaft through a thread.

[0008] Furthermore, the spiral plate 1 and the slide plate are welded to the outer side of the main shaft, the outer side of the spiral plate 1 is respectively clamped on the inner wall of the sleeve and the inner cylinder, one end of the slide plate is respectively welded to the two ends of the spiral plate 1, and a seal is opened on the inner side of the inner cylinder, and the other ends of the two slide plates pass through the seal and extend to the outer sides of the side sleeve 1 and the side sleeve 2, the two ends of the spiral plate 2 and the baffle are respectively welded to the inner wall of the inner cylinder, and the two baffles are respectively welded to the two ends of the spiral plate 2, the spiral plate 2 and the baffle are both clamped on the inner side of the main shaft, the spiral pitch of the spiral plate 1 and the spiral plate 2 is equal, the spiral plate 1 and the slide plates at both ends and the spiral plate 2 and the baffles at both ends separate the sleeve and the inner cylinder into wide flow channel 1 and wide flow channel 2, the wide flow channel 1 and the wide flow channel 2 are heat exchanged through the spiral plate 1 and the spiral plate 2, and the spiral plate 1 and the spiral plate 2 are both spiral heat conduction plates.

[0009] Furthermore, the outer sides of the two ends of the inner tube are respectively welded with a spacer ring 1 and a spacer ring 2, and the number of the spacer ring 1 and the spacer ring 2 is 2 groups. The outer sides of the two groups of the spacer ring 1 and the spacer ring 2 are respectively clamped on the inner walls of the card cover 1 and the card cover 2 through sealing rings. The outer sides of the partition are respectively welded to the outer side of the inner tube, one side of the spacer ring 1 and the other side of the spacer ring 2. The partition separates the spacer ring 1 and the spacer ring 2 into ring cavity 1 and ring cavity 2.

[0010] Furthermore, air ports and smoke ports are respectively provided on both sides of the inner tube, a connecting port is provided on the first spacer ring, and a side port is provided on the second spacer ring. An air inlet pipe is welded to the top of one end of the first card cover, and a smoke outlet pipe is welded to the bottom of the other end of the first card cover, an air outlet pipe is welded to the top of one end of the second card cover, and a smoke inlet pipe is welded to the bottom of the other end of the second card cover.

[0011] Furthermore, the air inlet pipe is connected to the air outlet pipe through the inner side of one end of the card cover, the side port, the annular cavity one, the air port, the wide flow channel one, the air port, the annular cavity one, the side port, and the inner side of one end of the card cover two in sequence, and the smoke inlet pipe is connected to the smoke outlet pipe through the inner side of the other end of the card cover two, the connecting port, the annular cavity two, the smoke port, the wide flow channel two, the smoke port, the annular cavity two, the connecting port, and the inner side of the other end of the card cover one in sequence.

[0012] Furthermore, temperature sensors are installed on the air outlet pipe and the smoke outlet pipe, and scrapers are welded on the outer sides of the spacer ring 1 and the spacer ring 2. The outer edges of the scrapers are respectively stuck on the inner walls of the card cover 1 and the card cover 2, the outer edge of the sleeve, the outer side of the side sleeve 1 and the outer side of the side sleeve 2.

[0013] Furthermore, a sliding groove is opened on the inner wall of the top of the sleeve, the slider is clamped on the inner side of the sliding 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 clamped on both sides of spiral plate one and spiral plate two respectively.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. When the wide channel plate air preheater with self-cleaning function is in use, air is passed into the air inlet pipe, and then passes through the inner side of one end of the card cover, the side port, the annular cavity one and the air port in turn into one end of the wide channel one, and flows in a spiral from right to left in the wide channel one, and then passes through the air port, the annular cavity one, the side port, and the inner side of one end of the card cover two into the air outlet pipe, and then passes through the inner side of the other end of the card cover two, the connecting port, the annular cavity two and the air port in turn into the inner side of the wide channel two, and flows in a spiral from left to right in the inner side of the wide channel two, so that the air in the wide channel one passes through the spiral plate one and the spiral plate two to perform heat exchange with the flue gas in the wide channel two, the temperature of the flue gas gradually decreases, and the temperature of the air gradually increases. When the spiral plate one and the spiral plate two are heated, the flue gas in the wide channel two is heated, and the flue gas in the wide channel two is heated. When the spiral plate one and the spiral plate two are heated, the temperature of the flue gas gradually decreases, and the temperature of the air gradually increases. When there is a lot of smoke and dust attached to spiral plate 1 and spiral plate 2, turn on motor 1, and motor 1 drives the main shaft to rotate back and forth through the prism, and the main shaft drives spiral plate 1 and the slide plate, and the slide plate drives the inner cylinder, partition ring 1 and partition ring 2 to rotate, and the partition plate always keeps the ring cavity 1 and the ring cavity 2 separated to avoid gas exchange, and the inner cylinder drives spiral plate 2 to rotate, so that spiral plate 1 and spiral plate 2 rotate back and forth on the inner side of the sleeve, and the slider drives the scraper to scrape back and forth on the outer side of spiral plate 1 and spiral plate 2 under the limit of the slide groove, scraping off the smoke and dust on spiral plate 1 and spiral plate 2 and taking it away by the airflow, which can effectively clean the spiral wide flow channel plate heat exchange structure and prevent smoke and dust from affecting the heat exchange efficiency.

[0015] 2. When the wide-channel plate air preheater with self-cleaning function is in use, the temperature of the heated air and the cooled flue gas is measured respectively by temperature sensors. When the temperature of the heated air is insufficient or the temperature of the exhausted flue gas is high, motor 2 is turned on. Motor 2 drives the main shaft through the screw rod, and the main shaft drives the spiral plate 1 and the slide plate to move left or right. The slide plate can move left and right through the seal under the seal of the inner cylinder. The spiral plate 2 is fixed by the inner cylinder, and the main shaft can move left and right on the inside of the spiral plate 2 and the baffle, thereby reducing the width of the wide channel 1 and increasing the width of the wide channel 2 (or reducing the width of the wide channel 2 and increasing the width of the wide channel 1), thereby reducing the air flow and increasing the flue gas flow (or reducing the flow of flue gas and increasing the air flow), so as to ensure that the temperature of the heated air can meet the demand, and fully recover the heat in the flue gas to reduce energy waste.

[0016] 3. When the wide-channel plate-type air preheater with self-cleaning function is cleaning spiral plate 1 and spiral plate 2, the inner cylinder synchronously drives the spacer ring 1 and the spacer ring 2 to rotate back and forth synchronously, and the spacer ring 1 and the spacer ring 2 both drive the scraper to rotate back and forth. The scraper scrapes off the dust on the inner walls of the card cover 1 and the card cover 2, the outer side of the sleeve, the outer side of the side sleeve 1 and the outer side of the side sleeve 2, and is blown to the inner side of the smoke outlet pipe by the airflow of the flue gas and discharged outward, thereby automatically cleaning the channels at both ends of the heat exchange structure to avoid reducing the airflow velocity due to the adhesion of smoke and dust, thereby ensuring the working efficiency of the heat exchange structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a wide-channel plate-type air preheater with a self-cleaning function according to the present invention; Figure 2 This is a cross-sectional view of a wide-channel plate-type air preheater with a self-cleaning function according to the present invention; Figure 3 This is a structural schematic diagram of a sleeve of a wide-channel plate-type air preheater with a self-cleaning function according to the present invention; Figure 4 This is a structural schematic diagram of the main shaft of a wide-channel plate-type air preheater with a self-cleaning function according to the present invention; Figure 5 This is a structural schematic diagram of the inner tube of a wide-channel plate-type air preheater with a self-cleaning function according to the present invention; Figure 6 This is a structural schematic diagram of a scraper of a wide-channel plate-type air preheater with a self-cleaning function according to the present invention; In the figure: 1. sleeve; 2. card cover 1; 3. card cover 2; 4. air inlet pipe; 5. air outlet pipe; 6. smoke outlet pipe; 7. smoke inlet pipe; 8. side sleeve 1; 9. motor 1; 10. side sleeve 2; 11. motor 2; 12. main shaft; 13. prism; 14. screw rod; 15. spiral plate 1; 16. spiral plate 2; 17. slide plate; 18. baffle; 19. slide groove; 20. slider; 21. scraper; 22. inner cylinder; 23. spacer ring 1; 24. spacer ring 2; 25. seal; 26. partition; 27. air port; 28. side port; 29. smoke port; 30. connecting port; 31. temperature sensor; 32. scraper. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] See also Figures 1 to 6The present invention provides a technical solution: a wide-channel plate-type air preheater with a self-cleaning function, comprising a sleeve 1 and a main shaft 12, a connecting assembly is installed at both ends of the sleeve 1, the connecting assembly comprises a card cover 2 and a card cover 3, a supporting assembly is installed on the connecting assembly, the supporting assembly comprises a side sleeve 8 and a side sleeve 2 10, a torsion assembly is installed on the side sleeve 8, the torsion assembly comprises a motor 9 and a prism 13, a push-pull assembly is installed on the side sleeve 2 10, the push-pull assembly comprises a motor 2 11 and a screw rod 14, a flow channel assembly is installed on the main shaft 12, the flow channel assembly comprises a spiral plate 15 and a spiral plate 2 16, an isolation assembly is installed on the flow channel assembly, and the isolation assembly comprises a slide plate 17 and a baffle 18. The sleeve 1 is provided with a dust cleaning component, which includes a slider 20 and a scraper 21. The card cover 2 is provided with a connecting component, which includes an inner cylinder 22 and a partition 26. The side sleeve 18 is installed on the outside of one end of the sleeve 1, and the side sleeve 21 is installed on the outside of the other end of the sleeve 1. One end of the card cover 2 is welded to the outside of one end of the sleeve 1, and the other end of the card cover 2 is sleeved on the outside of the side sleeve 8. One end of the card cover 23 is welded to the outside of the other end of the sleeve 1, and the other end of the card cover 23 is welded to the outside of the side sleeve 210. The motor 19 is installed on the outside of the side sleeve 18 by bolts, and the motor 211 is installed on the outside of the side sleeve 210 by bolts. The inner cylinder 22 is provided with a dust cleaning component, which includes a slider 20 and a scraper 21. It 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 1 8 through 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 2 10 through sealing rings, one end of the main shaft 12 is installed on the inner side of the side sleeve 1 8, the other end of the main shaft 12 passes through the inner cylinder 1, the sleeve 1 and the inner cylinder 2 in sequence and extends to the inner side of the side sleeve 2 10, one end of the main shaft 12 is provided with a prism, one end of the prism 13 is keyed to the output shaft of the motor 1 9, the other end of the prism 13 passes through the side sleeve 1 8 through a sealing ring and is stuck on the inner side of the prism groove, one end of the screw rod 14 is keyed to the output shaft of the motor 2 11, and the other end of the screw rod 14 passes through the side sleeve 2 10 through a sealing ring And it is installed on the inner side of the other end of the main shaft 12 through a thread, and a temperature sensor 31 is installed on the air outlet pipe 5. The outer sides of the spacer ring 1 23 and the spacer ring 2 24 are welded with scrapers 32, and the outer sides of the scrapers 32 are respectively on the inner walls of the card cover 1 2 and the card cover 2 3, the outer side of the sleeve 1, the outer side of the side sleeve 1 8 and the outer side of the side sleeve 2 10. When the spiral plate 15 and the spiral plate 2 16 are cleaned, the inner cylinder 22 synchronously drives the spacer ring 1 23 and the spacer ring 2 24 to rotate back and forth synchronously, and the spacer ring 1 23 and the spacer ring 2 24 both drive the scraper 32 to rotate back and forth, and the scraper 32 scrapes off the dust on the inner walls of the card cover 1 2 and the card cover 2 3, the outer side of the sleeve 1, the outer side of the side sleeve 1 8 and the outer side of the side sleeve 2 10.The smoke is blown to the inside of the smoke outlet pipe 6 by the smoke flow and discharged outward, thereby automatically cleaning the channels at both ends of the heat exchange structure, avoiding the reduction of air flow speed due to smoke adhesion, and ensuring the working efficiency of the heat exchange structure.

[0020] In this embodiment, the spiral plate 15 and the slide 17 are welded to the outer side of the main shaft 12, and the outer sides of the spiral plate 15 are respectively clamped on the inner walls of the sleeve 1 and the inner cylinder 22. One end of the slide 17 is respectively welded to the two ends of the spiral plate 15. A seal 25 is provided on the inner side of the inner cylinder 22. The other ends of the two slides 17 pass through the seal 25 and extend to the inner side of the side sleeve 1 8 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 baffle 18 are both clamped on the outer side of the main shaft 12. The spiral plate 15 and the spiral The spiral pitches of the plate 2 16 are equal. The spiral plate 15 and the slides 17 at both ends thereof and the baffles 18 at both ends of the spiral plate 2 16 separate the sleeve 1 and the inner cylinder 22 into wide flow channel 1 and wide flow channel 2. The wide flow channel 1 and wide flow channel 2 are heat exchanged through the spiral plate 1 15 and the spiral plate 2 16. The spiral plate 1 15 and the spiral plate 2 16 are both spiral heat conducting plates. The air inlet pipe 4 is connected to the air outlet pipe 5 in sequence through the inner side of one end of the card cover 1 2, the side port 28, the annular cavity 1, the air port 27, the wide flow channel 1, the air port 27, the annular cavity 1, the side port 28, and the inner side of one end of the card cover 2 3. The smoke inlet pipe 7 is connected to the air outlet pipe 5 in sequence through the inner side of the other end of the card cover 2 3, the connecting port 30, the annular cavity 2, the smoke The inner side of the other end of the opening 29, the wide flow channel 2, the smoke opening 29, the annular cavity 2, the connecting opening 30, and the card cover 2 is connected to the smoke outlet pipe 6. A slide groove 19 is provided on the inner wall of the top of the sleeve 1. The slider 20 is stuck on the inner side of the slide 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 scrapers 21 are respectively stuck on both sides of the spiral plate 15 and the spiral plate 2 16. When in use, the temperature of the heated air and the cooled flue gas are measured respectively by the temperature sensor 31. When the temperature of the heated air is insufficient or the temperature of the exhausted flue gas is high, the motor 2 11 is turned on, and the motor 2 11 is connected to the spiral plate 15 through the wire. The rod 14 drives the main shaft 12, and the main shaft 12 drives the spiral plate 15 and the slide 17 to move left or right. The slide 17 can move left and right through the seal 25 under the sealing 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 on the inside of the spiral plate 2 16 and the baffle 18, thereby reducing the width of the wide flow channel 1 and increasing the width of the wide flow channel 2 (or reducing the width of the wide flow channel 2 and increasing the width of the wide flow channel 1), thereby reducing the air flow and increasing the flue gas flow (or reducing the flow of flue gas and increasing the air flow), so as to ensure that the temperature of the heated air can meet the demand, and fully recover the heat in the flue gas to reduce energy waste.

[0021] In this embodiment, the outer sides of the two ends of the inner tube 22 are respectively welded with a spacer ring 1 23 and a spacer ring 2 24, and the number of the spacer ring 1 23 and the spacer ring 2 24 is 2 groups. The outer sides of the two groups of the spacer ring 1 23 and the spacer ring 2 24 are respectively clamped on the inner walls of the card cover 1 2 and the card cover 2 3 through sealing rings. The outer sides of the partition 26 are respectively welded to the outer side of the inner tube 22, one side of the spacer ring 1 23 and the other side of the spacer ring 24. The partition 26 separates the spacer ring 1 23 and the spacer ring 2 24 into an annular cavity 1 and an annular cavity 2. The two sides of the inner tube 22 are respectively provided with an air port 27 and a smoke port 29. The spacer ring 1 23 is provided with a There is a connecting port 30, a side port 28 is opened on the spacer ring 24, an air inlet pipe 4 is welded to the top of one end of the card cover 1 2, a smoke outlet pipe 6 is welded to the bottom of the other end of the card cover 1 2, an air outlet pipe 5 is welded to the top of one end of the card cover 2 3, and a smoke inlet pipe 7 is welded to the bottom of the other end of the card cover 2 3. When in use, air is passed into the air inlet pipe 4, and then passes through the inner side of one end of the card cover 1 2, the side port 28, the annular cavity 1 and the air port 27 to enter one end of the wide flow channel 1, and flows spirally from right to left in the wide flow channel 1, and then passes through the air port 27, the annular cavity 1, the side port 28, and the inner side of one end of the card cover 2 3 to enter the air outlet pipe 5, the smoke is passed into the smoke inlet pipe 7, and then enters the inner side of the other end of the card cover 2 3, the connecting port 30, the annular cavity 2 and the smoke port 29 in sequence into the inner side of the wide flow channel 2, and spirally flows from left to right on the inner side of the wide flow channel 2, so that the air in the wide flow channel 1 passes through the spiral plate 15 and the spiral plate 2 16 to exchange heat with the smoke in the wide flow channel 2, the temperature of the smoke gradually decreases, and the temperature of the air gradually increases. When a lot of smoke dust is attached to the spiral plate 15 and the spiral plate 2 16, the motor 1 9 is turned on, and the motor 1 9 drives the main shaft 12 to rotate back and forth through the prism 13, and the main shaft 12 drives the spiral plate 15 and the slide plate 17, and the slide plate 17 It drives the inner cylinder 22, the partition ring 1 23 and the partition ring 2 24 to rotate, and always keeps the ring cavity 1 and the ring cavity 2 separated by the partition plate 26 to avoid gas exchange. The inner cylinder 22 drives the spiral plate 2 16 to rotate, so that the spiral plate 15 and the spiral plate 2 16 rotate back and forth on the inner side of the sleeve 1. The slider 20 drives the scraper 21 to scrape back and forth on the outer side of the spiral plate 15 and the spiral plate 2 16 under the limitation of the slide groove 19, scraping off the smoke and dust on the spiral plate 15 and the spiral plate 2 16 and being carried away by the airflow, which can effectively clean the spiral wide flow channel plate type heat exchange structure to prevent smoke and dust from affecting the heat exchange efficiency.

[0022] The wide channel plate air preheater with self-cleaning function provides power to all electrical equipment through an external power supply. When in use, air is passed into the air inlet pipe 4, and then passes through the inner side of one end of the card cover 2, the side port 28, the annular cavity 1 and the air port 27 to enter one end of the wide channel 1, and flows in a spiral from right to left in the wide channel 1, and then passes through the air port 27, the annular cavity 1, the side port 28, and the inner side of one end of the card cover 2 3 to enter the air outlet pipe 5, and the flue gas is passed into the smoke inlet pipe 7, and then passes through the inner side of the other end of the card cover 2 3, the connecting port 30, the annular cavity 2 and the smoke port 29 to enter the inner side of the wide channel 2, and flows in a spiral from left to right in the inner side of the wide channel 2, so that the air in the wide channel 1 passes through the spiral plate 15 and the spiral plate 2 16 to perform heat exchange with the flue gas in the wide channel 2, and the temperature of the flue gas is reduced. The temperature gradually decreases and the air temperature gradually increases. When more smoke and dust adhere to the spiral plate 15 and the spiral plate 2 16, the motor 19 is turned on. The motor 19 drives the main shaft 12 to rotate back and forth through the prism 13. The main shaft 12 drives the spiral plate 15 and the slide 17. The slide 17 drives the inner cylinder 22, the partition ring 1 23 and the partition ring 2 24 to rotate, and the partition 26 is used to always keep the ring cavity 1 and the ring cavity 2 separated to avoid gas exchange. The inner cylinder 22 drives the spiral plate 2 16 to rotate, thereby making the spiral plate 15 and the spiral plate 2 16 rotate back and forth on the inner side of the sleeve 1. The slider 20 drives the scraper 21 to scrape back and forth on the outer side of the spiral plate 15 and the spiral plate 2 16 under the limit of the slide groove 19, removing the smoke and dust on the spiral plate 15 and the spiral plate 2 16 The dust is scraped off and carried away by the air flow, which can effectively clean the spiral wide channel plate heat exchange structure to prevent smoke from affecting the heat exchange efficiency. The temperature sensor 31 is used to measure the temperature of the heated air and the cooled flue gas respectively. When the temperature of the heated air is insufficient or the temperature of the exhausted flue gas is high, the motor 2 11 is turned on, and the motor 2 11 drives the main shaft 12 through the screw rod 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 sealing of the inner cylinder 22. The spiral plate 2 16 is fixed by the inner cylinder 22, and the main shaft 12 can move left and right on the inside of 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 degree (or reduce the width of the wide flow channel 2 and increase the width of the wide flow channel 1), and then reduce the air flow and increase the flue gas flow (or reduce the flow of flue gas and increase the air flow) to ensure that the temperature of the heated air can meet the demand, and fully recover the heat in the flue gas, reduce energy waste, and when the spiral plate 15 and the spiral plate 2 16 are cleaning, the inner cylinder 22 synchronously drives the partition ring 1 23 and the partition ring 2 24 to rotate back and forth synchronously, and the partition ring 1 23 and the partition ring 2 24 both drive the scraper 32 to rotate back and forth, and the scraper 32 respectively scrapes off the dust on the inner walls of the card cover 1 2 and the card cover 2 3, the outer side of the sleeve 1, the outer side of the side sleeve 1 8 and the outer side of the side sleeve 2 10, and is blown to the inner side of the smoke outlet pipe 6 by the airflow of the flue gas.And discharge it outwards, thus automatically cleaning the channels at both ends of the heat exchange structure, avoiding the reduction of air flow speed due to smoke and dust adhesion, and ensuring the working efficiency of the heat exchange structure.

[0023] The above shows and describes the basic principles and main features of the present invention and the 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 present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0024] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A wide-channel plate-type air preheater with a self-cleaning function, comprising a sleeve (1) and a main shaft (12), wherein connecting components are installed at both ends of the sleeve (1), and the connecting components include a first card cover (2) and a second card cover (3), characterized in that: A support assembly is mounted on the connecting assembly, the support assembly includes a side sleeve 1 (8) and a side sleeve 2 (10), a torsion assembly is mounted on the side sleeve 1 (8), the torsion assembly includes a motor 1 (9) and a prism (13), a push-pull assembly is mounted on the side sleeve 2 (10), the push-pull assembly includes a motor 2 (11) and a screw rod (14), a flow channel assembly is mounted on the main shaft (12), the flow channel assembly includes a spiral plate 1 (15) and a spiral plate 2 (16), an isolation assembly is mounted on the flow channel assembly, the isolation assembly includes a slide plate (17) and a baffle (18), a dust cleaning assembly is mounted on the sleeve (1), the dust cleaning assembly includes a slider (20) and a scraper (21), and a connecting assembly is mounted on the cover 1 (2), the connecting assembly includes an inner cylinder (22) and a partition (26).

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

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

4. The 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 mounted on the inner side of the side sleeve (8), and the other end of the main shaft (12) passes through the inner tube (1), the sleeve (1) and the inner tube (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 prism groove, one end of the prism (13) is key-connected with 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 stuck on the inner side of the prism groove, one end of the screw rod (14) is key-connected with the output shaft of the motor (11), the other end of the screw rod (14) passes through the side sleeve (10) through a sealing ring and is mounted on the inner side of the other end of the main shaft (12) through a thread.

5. The wide-channel plate-type air preheater with self-cleaning function according to claim 4, characterized in that: The spiral plate 1 (15) and the slide plate (17) are welded to the outer side of the main shaft (12), and the outer side of the spiral plate 1 (15) is respectively clamped on the inner wall of the sleeve (1) and the inner cylinder (22). One end of the slide plate (17) is respectively welded to the two ends of the spiral plate 1 (15). The inner side of the inner cylinder (22) is provided with a seal (25). The other ends of the two slide plates (17) pass through the seal (25) and extend to the inner side of the side sleeve 1 (8) 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) They are respectively welded to the two ends of spiral plate 2 (16), and the spiral plate 2 (16) and the baffle (18) are clamped on the outer side of the main shaft (12). The spiral pitches of spiral plate 1 (15) and spiral plate 2 (16) are equal. The spiral plate 1 (15) and the slides (17) at both ends and the spiral plate 2 (16) and the baffles (18) at both ends separate the sleeve (1) and the inner cylinder (22) into wide flow channel 1 and wide flow channel 2. The wide flow channel 1 and wide flow channel 2 exchange heat through spiral plate 1 (15) and spiral plate 2 (16). The spiral plate 1 (15) and spiral plate 2 (16) are both spiral heat conduction plates.

6. The wide-channel plate-type air preheater with self-cleaning function according to claim 5, characterized in that: The outer sides of both ends of the inner tube (22) are respectively welded with a spacer ring 1 (23) and a spacer ring 2 (24), and the number of the spacer ring 1 (23) and the spacer ring 2 (24) is 2 groups. The outer sides of the two groups of the spacer ring 1 (23) and the spacer ring 2 (24) are respectively clamped on the inner walls of the card cover 1 (2) and the card cover 2 (3) through sealing rings. The outer sides of the partition (26) are respectively welded to the outer side of the inner tube (22), one side of the spacer ring 1 (23) and the other side of the spacer ring 2 (24). The partition (26) separates the spacer ring 1 (23) and the spacer ring 2 (24) into an annular cavity 1 and an annular cavity 2.

7. The wide-channel plate-type air preheater with self-cleaning function according to claim 6, characterized in that: An air port (27) and a smoke port (29) are respectively provided on both sides of the inner tube (22); a connecting port (30) is provided on the first spacer ring (23); a side port (28) is provided on the second spacer ring (24); an air inlet pipe (4) is welded to the top of one end of the first card cover (2); a smoke outlet pipe (6) is welded to the bottom of the other end of the first card cover (2); an air outlet pipe (5) is welded to the top of one end of the second card cover (3); and a smoke inlet pipe (7) is welded to the bottom of the other end of the second card cover (3).

8. The wide-channel plate-type air preheater with self-cleaning function according to claim 7, characterized in that: The air inlet pipe (4) is connected to the air outlet pipe (5) in sequence through the inner side of one end of the card cover (2), the side port (28), the annular cavity (1), the air port (27), the wide flow channel (1), the air port (27), the annular cavity (1), the side port (28), and the inner side of one end of the card cover (3). The smoke inlet pipe (7) is connected to the smoke outlet pipe (6) in sequence through the inner side of the other end of the card cover (3), the connecting port (30), the annular cavity (2), the smoke port (29), the wide flow channel (2), the smoke port (29), the annular cavity (2), the connecting port (30), and the inner side of the other end of the card cover (2).

9. The wide-channel plate-type air preheater with self-cleaning function according to claim 8, characterized in that: Temperature sensors (31) are installed on the air outlet pipe (5) and the smoke outlet pipe (6), and scrapers (32) are welded on the outer sides of the spacer ring 1 (23) and the spacer ring 2 (24), and the outer sides of the scrapers (32) are respectively on the inner walls of the card cover 1 (2) and the card cover 2 (3), the outer side of the sleeve (1), the outer side of the side sleeve 1 (8) and the outer side of the side sleeve 2 (10).

10. The wide-channel plate-type air preheater with self-cleaning function according to claim 9, characterized in that: A slide groove (19) is provided on the inner wall of the top of the sleeve (1), the slider (20) is clamped on the inner side of the slide 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), and the scraper (21) is clamped on both sides of the spiral plate 1 (15) and the spiral plate 2 (16).

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