High-temperature flue gas heat exchange device and horseshoe flame industrial kiln

Abstract

The invention provides a high-temperature flue gas heat exchange device and a horseshoe flame industrial kiln, and relates to the technical field of cooling equipment.The high-temperature flue gas heat exchange device comprises a box body, an axial flow fan, a calandria, a scraper blade and a driving mechanism, an upper partition plate and a lower partition plate are arranged in the box body, and the interior of the box body is divided into an upper cavity, a middle cavity and a lower cavity by the upper partition plate and the lower partition plate; a flue gas inlet communicated with the lower chamber and a flue gas outlet communicated with the upper chamber are formed in the box body; the plurality of tube banks are arranged in the middle chamber in an array manner; an air inlet and an air outlet which are communicated with the middle cavity are oppositely formed in the box body, and the axial flow fan is arranged at the air inlet; a scraping plate is arranged in each discharge pipe, and each scraping plate is connected with a driving mechanism. Compared with the prior art, the high-temperature flue gas heat exchange device has the advantages that viscous attachments on the inner wall of the calandria can be effectively removed, and the problems of heat exchange efficiency reduction and pipeline blockage caused by powder accumulation are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling equipment, in particular to a high-temperature flue gas heat exchange device and a horse-shoe flame industrial furnace. BACKGROUND

[0002] As the mainstream furnace type in the field of glass manufacturing, the horse-shoe flame industrial furnace has a unique horse-shoe shaped flame flow path and a same-side arranged flame outlet and exhaust gas outlet structure, which achieves high thermal efficiency while causing a problem of high-temperature flue gas treatment. The flue gas discharged by the furnace usually has a temperature exceeding 350℃, which is far beyond the temperature resistance limit of 300℃ of the bag material of a conventional dust collector, and must be subjected to effective cooling treatment before entering the subsequent dust removal process. More troublesome is that the high-temperature flue gas contains a large amount of gaseous metal oxide substances such as boron, potassium and sodium, which will sublimate to form sticky solid particulate matters during the temperature reduction process. When the traditional tube-type heat exchanger is used to treat such flue gas, the sticky particulate matters will adhere to the inner wall of the tube to form stubborn scale, resulting in a sharp decrease in heat exchange efficiency or even complete blockage of the tube. SUMMARY

[0003] The problem to be solved by the present application is how to solve the problem of tube fouling in the flue gas heat exchange process.

[0004] The present application provides a high-temperature flue gas heat exchange device, comprising a box body, an axial flow fan, a tube, a scraper and a driving mechanism, wherein the box body is provided with an upper partition plate and a lower partition plate, and the upper partition plate and the lower partition plate divide the interior of the box body into an upper chamber, a middle chamber and a lower chamber, and the box body is provided with a flue gas inlet communicating with the lower chamber and a flue gas outlet communicating with the upper chamber; a plurality of tubes are arrayed in the middle chamber, and the two ends of each tube penetrate through the upper partition plate and the lower partition plate and extend into the upper chamber and the lower chamber; the box body is provided with an air inlet and an air outlet communicating with the middle chamber in opposition, and the axial flow fan is arranged at the air inlet; each tube is provided with a scraper, and each scraper is connected with the driving mechanism, and the driving mechanism is used to drive each scraper to rotate to scrape off the adhering matters adhered to the inner wall of the tube.

[0005] The high-temperature flue gas heat exchange device provided by the present application has the following beneficial effects, but is not limited to the following: The high-temperature flue gas heat exchange device comprises a box body, an upper partition plate, a lower partition plate, an upper chamber, a middle chamber, a lower chamber, a plurality of rows of pipes, a plurality of scrapers, a driving mechanism, an axial flow fan, and a plurality of cooling medium inlets and outlets. The upper chamber, the middle chamber, and the lower chamber are formed by the upper partition plate and the lower partition plate. The rows of pipes are arranged in the middle chamber, for example, in an equal interval or staggered arrangement, to increase the heat exchange area. The axial flow fan is arranged at the air inlet, for example, an adjustable speed fan, to improve the flow speed of the cooling medium (air) in the middle chamber by forced convection. The scraper is arranged in a gap with the inner wall of the row of pipes, for example, a flexible scraper or a rigid scraper structure, to peel off the adhering objects by rotating movement. The driving mechanism drives the plurality of scrapers to rotate synchronously or asynchronously by mechanical transmission, for example, a gear set or a connecting rod mechanism to realize power distribution. Specifically, the high-temperature flue gas flows into the lower chamber and then flows through the inside of the plurality of rows of pipes, and the heat is transferred to the cooling medium in the middle chamber through the pipe wall. The cooling medium flows into the middle chamber from the air inlet under the driving of the axial flow fan, flows through the outer wall of the row of pipes, and then flows out from the air outlet. The scraper rotates along the inner wall of the row of pipes under the driving of the driving mechanism, continuously scraping off the powder-like adhering objects formed by sublimation. The removed adhering objects fall to the lower chamber under the action of gravity and are finally discharged from the box body. Compared with the related art, the conventional row of pipe heat exchanger lacks self-cleaning function, and the adhering objects on the pipe wall cause the heat exchange efficiency to decrease or even be blocked after long-term operation. The high-temperature flue gas heat exchange device can effectively remove the viscous adhering objects on the inner wall of the row of pipes, avoiding the problems of heat exchange efficiency decrease and pipe blockage caused by powder accumulation.

[0006] Optionally, the driving mechanism comprises a connecting rod, a connecting shaft, a transmission shaft, a first gear, a second gear, and a speed reduction motor. The box body is provided with a support seat, the transmission shaft is rotationally connected to the support seat, the speed reduction motor is arranged on the box body and is in transmission connection with the transmission shaft, and a plurality of first gears are arranged on the transmission shaft at intervals. The top of the box body is provided with a top plate, a plurality of bearing seats are arranged on the top plate, and each bearing seat is rotationally connected with a connecting shaft. The upper end of each connecting shaft is provided with a second gear, and each second gear is in meshing connection with a corresponding first gear. The lower end of each connecting shaft penetrates through the top plate and extends into the upper chamber, and a plurality of connecting rods are in one-to-one transmission connection between a plurality of connecting shafts and a plurality of scrapers.

[0007] Optionally, a plurality of transmission shafts are arranged, and any two adjacent transmission shafts are in transmission connection through a linkage gear.

[0008] Optionally, first pin holes are arranged at the two ends of the connecting rod, second pin holes are arranged on the connecting shaft, and third pin holes are arranged on the scraper. The two first pin holes and the second pin holes and the third pin holes are connected through a pin shaft. The opening directions of the two first pin holes are perpendicular.

[0009] Optionally, the box body comprises a top plate and a bottom plate, a region between the top plate and the upper partition plate is the upper chamber, a region between the upper partition plate and the lower partition plate is the middle chamber, and a region between the bottom plate and the lower partition plate is the lower chamber.

[0010] Optionally, the box body further comprises side wall plates, the top plate, the bottom plate and the four side wall plates jointly form a rectangular shell, and the flue gas inlet and the flue gas outlet are located on two opposite side wall plates.

[0011] Optionally, a discharge port is formed in the bottom plate, a hopper structure is arranged at the discharge port, and a feeder is arranged below the hopper structure.

[0012] Optionally, a flange gland is fixedly sleeved below each of the exhaust pipes, and each of the flange glands is bolted to the lower partition plate; and an upper portion of each of the exhaust pipes is welded to the upper partition plate.

[0013] Optionally, the flue gas outlet is provided with a temperature sensor.

[0014] In addition, the application also provides a horse-shoe flame industrial furnace comprising the high-temperature flue gas heat exchange device.

[0015] Since the technical improvement and the technical effects of the horse-shoe flame industrial furnace are the same as those of the high-temperature flue gas heat exchange device, the technical effects of the horse-shoe flame industrial furnace will not be described in detail. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view of the high-temperature flue gas heat exchange device of the embodiment of the application. Figure 2 It is a front view of the high-temperature flue gas heat exchange device of the embodiment of the application. Figure 1 It is an enlarged view of a part A. Figure 3 It is an enlarged view of a part B. Figure 1 It is an enlarged view of a part B. Figure 4 It is a top view of the high-temperature flue gas heat exchange device of the embodiment of the application.

[0017] BRIEF DESCRIPTION OF DRAWINGS 1, box body; 11, flue gas inlet; 12, flue gas outlet; 13, air outlet; 14, upper partition plate; 15, lower partition plate; 16, top plate; 17, bottom plate; 2, axial flow fan; 3, exhaust pipe; 4, scraper; 51, connecting rod; 52, connecting shaft; 53, transmission shaft; 54, first gear; 55, second gear; 56, speed reducer motor; 61, support seat; 62, bearing seat; 71, hopper structure; 72, feeder; 8, flange gland. DETAILED DESCRIPTION

[0018] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0019] In the description of the present application, the orientation or positional relationship indicated by "upper", "lower", "left", "right", "top", "bottom", "front", "back", "inner" and "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application, and does not indicate or imply that the device referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present application.

[0020] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0021] In the description of the present application, the description of the terms "embodiment", "one embodiment" and "one implementation" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or implementation are included in at least one embodiment or implementation of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or implementation. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementations in a suitable manner.

[0022] Moreover, in the drawings, the X axis represents the horizontal direction, that is, the left and right positions, and the positive direction of the X axis represents the left, and the negative direction of the X axis represents the right; the Z axis represents the vertical direction, that is, the up and down positions, and the positive direction of the Z axis represents the up, and the negative direction of the Z axis represents the down.

[0023] It should be noted that the meanings of the aforementioned X axis and Z axis are only for the convenience of describing the present application and simplifying the description, and are not indicative or suggestive of the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] As Figures 1 to 2As shown, the high-temperature flue gas heat exchange device of this invention includes: a housing 1, an axial flow fan 2, pipe arrays 3, scrapers 4, and a drive mechanism. The housing 1 is equipped with an upper partition 14 and a lower partition 15, which divide the interior of the housing 1 into an upper chamber, a middle chamber, and a lower chamber. The housing 1 has a flue gas inlet 11 communicating with the lower chamber and a flue gas outlet 12 communicating with the upper chamber. Multiple pipe arrays 3 are arranged in the middle chamber. Each of the pipes 3 has its two ends passing through the upper partition 14 and the lower partition 15 and extending into the upper chamber and the lower chamber, respectively; the housing 1 has an air inlet and an air outlet 13 that communicate with the middle chamber, and the axial flow fan 2 is located at the air inlet; each of the pipes 3 has a scraper 4 installed inside, and each scraper 4 is connected to the drive mechanism, which drives each scraper 4 to rotate to scrape off the deposits attached to the inner wall of the pipe 3.

[0025] In this embodiment, in conjunction with the appendix Figure 1 As shown, the box 1 is connected from top to bottom by the upper partition 14 and the lower partition 15 (see attached diagram). Figure 1 The system comprises three independent chambers (upper, middle, and lower) along the Z-axis. Pipe arrays 3 are arranged in the middle chamber, for example, with equal or staggered spacing, to increase the heat exchange area. An axial flow fan 2 is located at the air inlet, for example, a speed-adjustable fan, to increase the flow velocity of the cooling medium (air) within the middle chamber through forced convection. Scrapers 4 are fitted with the inner wall of the pipe arrays 3 with a clearance fit, for example, using flexible or rigid scraper structures, to peel off adhering substances through rotational motion. A drive mechanism drives multiple scrapers 4 to rotate synchronously or asynchronously via mechanical transmission, for example, using gear sets or linkage mechanisms to achieve power distribution.

[0026] Specifically, after entering the lower chamber, the high-temperature flue gas flows through the interior of multiple pipes 3, and the heat is transferred through the walls of the pipes 3 to the cooling medium in the middle chamber. Driven by an axial flow fan, the cooling medium flows into the air inlet of the middle chamber, flows through the outer wall of the pipes 3, and is discharged from the air outlet 13. The scraper 4 rotates along the inner wall of the pipes 3 under the drive mechanism, continuously scraping off the powdery deposits formed by sublimation. The removed deposits fall into the lower chamber with gravity and are finally discharged from the housing 1.

[0027] Compared to related technologies, traditional tube-type heat exchangers lack self-cleaning capabilities, and long-term operation leads to a decrease in heat exchange efficiency or even blockage due to deposits on the tube walls. The high-temperature flue gas heat exchange device of this invention can effectively remove sticky deposits from the inner walls of the tubes, avoiding the problems of decreased heat exchange efficiency and pipe blockage caused by powder accumulation.

[0028] Optionally, the drive mechanism includes a connecting rod 51, a connecting shaft 52, a transmission shaft 53, a first gear 54, a second gear 55, and a reduction motor 56. A support base 61 is provided on the housing 1. The transmission shaft 53 is rotatably connected to the support base 61. The reduction motor 56 is provided on the housing 1 and is driven by the transmission shaft 53. A plurality of first gears 54 are spaced apart on the transmission shaft 53. The top of the housing 1 has a top plate 16. A plurality of bearing seats 62 are provided on the top plate 16, and a connecting shaft 52 is rotatably connected to each bearing seat 62. A second gear 55 is provided at the upper end of each connecting shaft 52. Each second gear 55 is meshed with a corresponding first gear 54. The lower end of each connecting shaft 52 passes through the top plate 16 and extends into the upper chamber. The plurality of connecting shafts 52 and the plurality of scrapers 4 are driven by a plurality of connecting rods 51 in a one-to-one transmission connection.

[0029] In this embodiment, in conjunction with the appendix Figure 1 and attached Figure 2 As shown, support base 61 refers to the mounting base used to support the rotational movement of drive shaft 53. It can be made of cast iron and formed into a block structure with shaft holes, providing stable support for drive shaft 53. Bearing housing 62 refers to the rotating component that fixes the connecting shaft 52. It can be made of a steel housing structure with rolling bearings, reducing frictional resistance during the rotation of connecting shaft 52. The transmission connection between the first gear 54 and the second gear 55 refers to the transmission of power through tooth meshing, which distributes the power of drive shaft 53 to multiple connecting shafts 52.

[0030] Specifically, the geared motor 56 outputs power to drive the transmission shaft 53 to rotate. The transmission shaft 53 drives the connecting shaft 52 to rotate synchronously through the meshing of the first gear 54 and the second gear 55. The bottom end of the connecting shaft 52 extends into the housing 1 and is rigidly connected to the scraper 4 through the connecting rod 51. When the connecting shaft 52 rotates, it drives the scraper 4 to move circumferentially on the inner wall of the drain pipe 3. Specifically, the scraper 4 is vertically arranged inside the drain pipe 3. The connecting rod 51 and the connecting shaft 52 can be coaxially connected and vertically arranged. The connecting rod 51 rotates around its axis, thereby driving the scraper 4 to rotate. Multiple first gears 54 are arranged axially at intervals along the transmission shaft 53 to form a power distribution node, so that a single transmission shaft 53 can simultaneously drive multiple sets of scrapers 4 to perform cleaning operations. The bearing seat 62 on the top plate 16 provides radial constraint for the connecting shaft 52 to ensure gear meshing accuracy and power transmission stability.

[0031] Optionally, multiple drive shafts 53 are provided, and any two adjacent drive shafts 53 are connected by a linkage gear 57.

[0032] In this embodiment, in conjunction with the appendix Figure 1 and attachedFigure 4 As shown, the drive shaft 53 refers to the mechanical shaft used to transmit rotational power, which can be implemented using a hollow steel shaft or a solid shaft. The linkage gear 57 refers to a gear structure that meshes in pairs to transmit power. After adjacent drive shafts 53 are connected by the linkage gear 57, they can achieve synchronous rotation, ensuring the consistency of the scraper's movement.

[0033] Specifically, multiple drive shafts 53 are arranged in parallel on the support base 61, and each drive shaft 53 is connected to its adjacent drive shaft 53 by a linkage gear 57. When the geared motor 56 drives one of the drive shafts 53 to rotate, the power is transmitted to the other drive shafts 53 sequentially through the linkage gear 57, causing all drive shafts 53 to rotate synchronously. The first gear 54 on the drive shaft 53 meshes with the second gear 55 on the connecting shaft 52, which in turn drives the scraper 4 inside the drain pipe 3 to rotate through the connecting rod 51. Thus, multiple drive shafts 53 share the power transmission task, and the meshing structure of the linkage gear 57 ensures that the rotation speed of each drive shaft 53 is consistent, preventing uneven cleaning effect of the drain pipe 3 due to asynchronous movement of the scraper 4.

[0034] Optionally, the connecting rod 51 has a first pin hole at each end, the connecting shaft 52 has a second pin hole, and the scraper 4 has a third pin hole. The two first pin holes are connected to the second pin hole and the third pin hole by a pin shaft. The opening directions of the two first pin holes are perpendicular to each other.

[0035] In this embodiment, the first pin hole refers to the through hole located at both ends of the connecting rod 51, which can be achieved by drilling, and is used to form a detachable hinge structure with the connecting shaft 52 and the scraper 4. The second pin hole refers to the through hole in the side wall of the connecting shaft 52, which can be achieved by machining the shaft laterally through it, and is used to form a rotational fit with the connecting rod 51. The third pin hole refers to the top of the scraper 4 (attached). Figure 1 The through hole (in the positive Z-axis direction) is used to form a hinge fulcrum with the connecting rod. The perpendicularity of the opening directions of the two first pin holes means that the pin hole axes at both ends of the connecting rod 51 are orthogonal. During the rotation of the connecting rod 51, it plays a role similar to a universal joint, preventing jamming during transmission.

[0036] Optionally, the housing 1 includes a top plate 16 and a bottom plate 17. The area between the top plate 16 and the upper partition 14 is the upper chamber, the area between the upper partition 14 and the lower partition 15 is the middle chamber, and the area between the bottom plate 17 and the lower partition 15 is the lower chamber.

[0037] In this embodiment, in conjunction with the appendix Figure 1As shown, the top plate 16 refers to the plate-like structure that forms the closed surface of the top of the housing 1, used to close the upper chamber and support components such as the bearing seat 62. The bottom plate 17 refers to the plate-like structure that forms the closed surface of the bottom of the housing 1, used to close the lower chamber and support the discharge port. The upper partition 14 refers to the transverse partition located on the upper layer inside the housing 1 (see attached diagram). Figure 1 The partition plate (in the X-axis direction) can be made of steel plate with pipe mounting holes, used to isolate the upper chamber from the middle chamber. The lower partition plate 15 is a transverse partition plate located on the lower layer inside the housing 1, and can be made of steel plate with pipe mounting holes symmetrical to the upper partition plate 14, used to isolate the middle chamber from the lower chamber. The upper chamber is the space between the top plate 16 and the upper partition plate 14, which can be formed by setting a flue gas outlet 12 to create a flue gas discharge channel. The lower chamber is the space between the bottom plate 17 and the lower partition plate 15, which can be formed by setting a flue gas inlet 12 to create a high-temperature flue gas input area.

[0038] Specifically, the top plate 16 and bottom plate 17 serve as the top and bottom boundaries of the housing 1, respectively, forming a rectangular shell together with the four side wall plates. The upper partition 14 and lower partition 15 are arranged parallel to each other inside the housing 1, dividing the shell vertically (protrudingly) into three independent chambers. High-temperature flue gas enters through the flue gas inlet of the lower chamber, flows upward along the exhaust pipe to the middle chamber for heat exchange, and finally exits from the flue gas outlet of the upper chamber. This structure creates a clear flue gas flow path through physical separation, while isolating the exhaust pipe area of ​​the middle chamber from the upper and lower chambers, facilitating individual cleaning of ash accumulation in each chamber during maintenance. For example, when cleaning the outer wall of the exhaust pipe is required, only the middle chamber can be inspected without interrupting the flue gas flow between the upper and lower chambers.

[0039] Optionally, the housing 1 also includes side wall panels, and the top plate 16, the bottom plate 17 and the four side wall panels together form a rectangular shell, with the flue gas inlet 11 and the flue gas outlet 12 located on two opposite side wall panels.

[0040] In this embodiment, in conjunction with the appendix Figure 1 As shown, the sidewall panels refer to the plates that form the side structure of the housing. The four sidewall panels, together with the top plate 16 and the bottom plate 17, form a rectangular shell. The flue gas inlet 11 and the flue gas outlet 12 being located on two opposite sidewall panels means that the flue gas inlet 11 and the flue gas outlet 12 are respectively located on two different sidewall panels. For example, the flue gas inlet 11 is located on the lower part of the left sidewall panel, while the flue gas outlet 12 is located on the upper part of the right sidewall panel.

[0041] Optionally, a discharge port is provided on the base plate 17, a funnel structure 71 is provided at the discharge port, and a feeder 72 is provided below the funnel structure 71.

[0042] In this embodiment, in conjunction with the appendix Figure 1As shown, the discharge port refers to the opening on the base plate 17 for discharging solid particles, which can be implemented using a circular or rectangular through-hole structure. The funnel structure 71 refers to the conical guide device installed below the discharge port, which can be formed by welding metal plates, and is used to concentrate and guide the solid particles collected at the discharge port to the feeder 72. The feeder 72 is a device used to control the discharge speed of solid particles, which can be implemented using a rotary valve or a star-shaped discharger, and achieves controlled discharge through intermittent opening and closing actions.

[0043] Specifically, during the operation of the high-temperature flue gas heat exchanger, sticky particles in the flue gas are removed from the inner wall of the discharge pipe 3 by the scraper 4 and fall to the bottom of the lower chamber by gravity. The discharge port on the bottom plate 17 collects the accumulated solid particles and conveys them to the feeder 72 through the guiding effect of the funnel structure 71. The feeder 72 discharges the solid particles outside the device by timed opening and closing or continuous operation, preventing the particles from being re-entrained or accumulating and clogging within the chamber. This structure achieves continuous cleaning of solid particles through the combination of mechanical guidance and automatic discharge.

[0044] Optionally, the lower part of each of the pipes 3 is fixedly fitted with a flange cover 8, and each of the flange covers 8 is bolted to the lower partition 15; the upper part of each of the pipes 3 is welded to the upper partition 14.

[0045] In this embodiment, in conjunction with the appendix Figure 1 and attached Figure 3 As shown, the flange cover 8 refers to a metal cover with an annular flange. Specifically, it can be made of carbon steel and processed into an annular structure with internal threads. The pipe 3 and the lower partition 15 can be detachably connected by bolt tightening.

[0046] Specifically, during installation, the lower end of pipe 3 passes through the lower partition 15 and is fitted with the flange cover 8. The flange cover 8 is then pressed tightly against the surface of the lower partition 15 using evenly distributed bolts, forming a detachable sealed connection. The upper end of pipe 3 is directly inserted into the pre-drilled hole in the upper partition 14 and welded around the circumference using a circumferential weld. Thus, the lower end of pipe 3 is a free end, preventing damage to pipe 3 due to thermal expansion deformation and bending.

[0047] Optionally, the flue gas outlet 12 is equipped with a temperature sensor.

[0048] In this embodiment, a temperature sensor is installed at the flue gas outlet 12 to detect the exhaust gas temperature in real time and send the temperature signal to the electronic control system. The electronic control system has a PID function, which controls the cooling airflow by adjusting the speed of the axial fan 2 to achieve constant control of the flue gas temperature.

[0049] In addition, the present invention also provides a horseshoe flame industrial kiln, including the high-temperature flue gas heat exchange device as described above.

[0050] Since the technical improvements and effects achieved by the horseshoe flame industrial kiln are the same as those of the high-temperature flue gas heat exchange device, the technical effects of the horseshoe flame industrial kiln will not be described in detail.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0052] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A high-temperature flue gas heat exchange device, characterized in that, include: The enclosure (1), axial flow fan (2), pipes (3), scraper (4), and drive mechanism are provided. The enclosure (1) is provided with an upper partition (14) and a lower partition (15), which divide the interior of the enclosure (1) into an upper chamber, a middle chamber, and a lower chamber. The enclosure (1) is provided with a flue gas inlet (11) communicating with the lower chamber and a flue gas outlet (12) communicating with the upper chamber. Multiple pipes (3) are arranged in an array in the middle chamber, and each pipe (3) The two ends of the tube (1) pass through the upper partition (14) and the lower partition (15) respectively and extend into the upper chamber and the lower chamber; the box body (1) is provided with an air inlet and an air outlet (13) communicating with the middle chamber, and the axial flow fan (2) is provided at the air inlet; each of the tubes (3) is provided with a scraper (4), and each scraper (4) is connected to the drive mechanism. The drive mechanism is used to drive each scraper (4) to rotate in order to scrape off the attachments on the inner wall of the tube (3).

2. The high-temperature flue gas heat exchanger according to claim 1, characterized in that, The drive mechanism includes a connecting rod (51), a connecting shaft (52), a transmission shaft (53), a first gear (54), a second gear (55), and a reduction motor (56). A support base (61) is provided on the housing (1). The transmission shaft (53) is rotatably connected to the support base (61). The reduction motor (56) is mounted on the housing (1) and is connected to the transmission shaft (53) via a transmission drive. Multiple first gears (54) are spaced apart on the transmission shaft (53). The top of the housing (1) has a top plate (16). The plate (16) is provided with a plurality of bearing seats (62), and each bearing seat (62) is rotatably connected to a connecting shaft (52). The upper end of each connecting shaft (52) is provided with a second gear (55), and each second gear (55) is meshed with the corresponding first gear (54). The lower end of each connecting shaft (52) passes through the top plate (16) and extends into the upper chamber. The plurality of connecting shafts (52) and the plurality of scrapers (4) are connected in a one-to-one transmission manner through the plurality of connecting rods (51).

3. The high-temperature flue gas heat exchanger according to claim 2, characterized in that, Multiple drive shafts (53) are provided, and any two adjacent drive shafts (53) are connected by a linkage gear (57).

4. The high-temperature flue gas heat exchanger according to claim 2, characterized in that, The connecting rod (51) has a first pin hole at each end, the connecting shaft (52) has a second pin hole, and the scraper (4) has a third pin hole. The two first pin holes are connected to the second pin hole and the third pin hole by a pin shaft. The opening directions of the two first pin holes are perpendicular to each other.

5. The high-temperature flue gas heat exchanger according to claim 1, characterized in that, The housing (1) includes a top plate (16) and a bottom plate (17). The area between the top plate (16) and the upper partition (14) is the upper chamber, the area between the upper partition (14) and the lower partition (15) is the middle chamber, and the area between the bottom plate (17) and the lower partition (15) is the lower chamber.

6. The high-temperature flue gas heat exchanger according to claim 5, characterized in that, The housing (1) includes side wall panels, the top plate (16), the bottom plate (17) and the four side wall panels together form a rectangular shell, and the flue gas inlet (11) and the flue gas outlet (12) are located on two opposite side wall panels.

7. The high-temperature flue gas heat exchanger according to claim 5, characterized in that, The bottom plate (17) is provided with a discharge port, and a funnel structure (71) is provided at the discharge port. A feeder (72) is provided below the funnel structure (71).

8. The high-temperature flue gas heat exchanger according to claim 1, characterized in that, Each of the pipes (3) has a flange cover (8) fixedly fitted on its lower part, and each flange cover (8) is bolted to the lower partition (15); the upper part of each of the pipes (3) is welded to the upper partition (14).

9. The high-temperature flue gas heat exchanger according to claim 1, characterized in that, The flue gas outlet (12) is equipped with a temperature sensor.

10. A horseshoe-flame industrial kiln, characterized in that, Includes the high-temperature flue gas heat exchange device as described in any one of claims 1-9.

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