Atmosphere heating device for roller kiln and method for recovering waste heat thereof

Abstract

The application discloses an atmosphere heating device for a roller kiln and a waste heat recovery method thereof, relates to the technical field of roller kilns, and comprises the roller kiln, a heat exchange pipe is arranged in the roller kiln, one end of an atmosphere pressure adjusting device is connected with the heat exchange pipe through a connecting device, the other end of the atmosphere pressure adjusting device is connected with an atmosphere input pipeline, and a control valve is arranged in the middle of the atmosphere input pipeline. Since the temperature of the injected atmosphere is generally indoor temperature, the injected atmosphere needs to absorb a large amount of heat to increase the temperature, the heat exchange pipe is arranged to absorb the waste heat in the natural cooling stage of the roller kiln and increase the temperature, so that the temperature of the atmosphere entering the roller kiln is increased, and the energy consumption of the roller kiln is reduced; the atmosphere pressure adjusting device is arranged to adjust the air pressure and the air volume of the injected atmosphere; and the connecting device is arranged to facilitate dismounting and replacing the atmosphere input pipeline.

Description

Technical Field

[0001] This invention relates to the field of roller kiln technology, specifically to an atmosphere heating device and a residual heat recovery method for roller kilns. Background Technology

[0002] Roller kilns are used for lithium battery sintering. The sintering of lithium battery materials is carried out by high-temperature heating in roller kilns. From an energy-saving perspective, the focus is on the effective utilization of waste heat. During the sintering process, an atmosphere (inert gas) needs to be injected into the roller kiln for protection, forming a slight positive pressure inside the kiln to prevent air from entering the kiln cavity. However, since the temperature of the injected atmosphere is generally the room temperature, the injected atmosphere needs to absorb a large amount of heat to raise its temperature, resulting in increased energy consumption of the roller kiln. Therefore, we provide an atmosphere heating device for roller kilns and other heat recovery methods to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide an atmosphere heating device and a residual heat recovery method for roller kilns, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: comprising: a roller kiln, wherein a heat exchange tube is installed inside the roller kiln, one end of an atmosphere pressure regulating device is connected to the heat exchange tube via a connecting device, the other end of the atmosphere pressure regulating device is connected to an atmosphere input pipe, and a control valve is provided in the middle of the atmosphere input pipe.

[0005] Preferably, the atmosphere pressure regulating device includes: a drive sleeve, a flow-guiding and pressurizing sleeve one, and a flow-guiding and pressurizing sleeve two. The two ends of the drive sleeve are respectively installed with a number of bolts to the flow-guiding and pressurizing sleeve one and the flow-guiding and pressurizing sleeve two. A number of flow-guiding blades are fixedly provided on the inner wall of the drive sleeve. A drive motor one is located inside the drive sleeve and is fixedly connected to the number of flow-guiding blades. A number of heat sinks are provided on the side of the drive motor one away from the output shaft.

[0006] Preferably, the first flow guiding and pressurizing sleeve has an air port 1 at the end away from the driving sleeve, a fixing ring is fixedly connected to the inner wall of the first flow guiding and pressurizing sleeve, and an adjustable fan blade unit is installed inside the fixing ring, and the second flow guiding and pressurizing sleeve has an air port 2 at the end away from the driving sleeve.

[0007] Preferably, air inlet one is connected to the heat exchange pipe via a connecting device, and air inlet two is connected to the air input pipe via a connecting device.

[0008] Preferably, the adjustable fan blade unit includes: a fan blade mounting frame, which is fixedly connected to an output shaft of a drive motor. The outer wall of the fan blade mounting frame is provided with several threaded holes, and several fan blades are installed one by one with the several threaded holes on the outer wall of the fan blade mounting frame through a fixing sleeve.

[0009] Preferably, the fan blade is fixedly connected to the fixed sleeve, and a thread is provided around the outer wall of the fixed sleeve. One end of the first connecting rod is fixedly connected to the threaded rod, and the other end of the first connecting rod is movably extended from the fixed sleeve and fixedly connected to a rotating handle. A limiting ring is fixedly sleeved on the outer wall of the first connecting rod, and the threaded sleeve is movably sleeved on the outer wall of the threaded rod. One end of the third connecting rod is hinged to the threaded sleeve, and the other end of the third connecting rod is hinged to the locking rod. The fixed sleeve is provided with several through slots, and the locking rod is placed in the through slots. One end of the positioning rod is fixedly connected to the inner wall of the fixed sleeve, and the other end of the positioning rod is connected to the threaded rod through a bearing.

[0010] Preferably, the connecting device includes: a semi-circular inner ring and a fixed outer ring, two sets of semi-circular inner rings are disposed inside the fixed outer ring, and the two sets of semi-circular inner rings are rotatably connected by a rotating shaft, the fixed outer ring is fixedly connected to the atmosphere pressure regulating device, a number of locking control units are arranged around the fixed outer ring, a number of safety reset units are installed between the semi-circular inner ring and the fixed outer ring, the control box is fixedly connected to the outer wall of the fixed outer ring, one end of the handle is rotatably connected to the inner wall of the control box, the other end of the handle extends movably out of the control box, the tightening wheel is fixedly sleeved on the outer wall of the handle, and two sets of fixed pulleys are fixedly connected to the outer wall of the fixed outer ring and are symmetrically arranged on both sides of the control box.

[0011] Preferably, the locking control unit includes: a second link, one end of which has a through hole, and the other end of which movably passes through the fixed outer ring and extends between the semi-circular inner ring and the fixed outer ring. A trapezoidal pressure block is fixedly connected to one end of the second link extending into the fixed outer ring. An arc-shaped rubber pad is fixedly provided on the trapezoidal pressure block. Several slots are provided in the inner wall of the fixed outer ring, and two sets of connecting springs are provided in the slots. The two ends of the connecting springs are fixedly connected to the inner wall of the slots and the trapezoidal pressure block, respectively. One end of the pull rope is wound around the tightening wheel, and the other end of the pull rope passes through the fixed pulley and the through hole and is wound around the tightening wheel.

[0012] Preferably, the safety reset unit includes: a telescopic rod, a plurality of slots 2 are provided on the outer wall of the semi-circular inner ring, one end of the telescopic rod is fixedly connected to the inner wall of the fixed outer ring, the other end of the telescopic rod extends into the slot 2 and is fixedly connected to a fixing plate, a connecting spring 2 is sleeved on the outer wall of the telescopic rod, and the two ends of the connecting spring 2 are fixedly connected to the inner wall of the fixed outer ring and the fixing plate respectively, and two sets of connecting spring 3 are provided in the slot 2, and the two ends of the connecting spring 3 are fixedly connected to the fixing plate and the inner wall of the slot 2 respectively.

[0013] A waste heat recovery method for controlling an atmosphere heating device for a roller kiln includes the following steps:

[0014] S1: Install two sets of connecting devices at both ends of the atmosphere pressure regulating device;

[0015] S2: Connect one end of the atmosphere pressure regulating device to the heat exchange tube via a connecting device;

[0016] S3: Connect the other end of the atmosphere pressure regulator to the atmosphere input pipeline via a connecting device;

[0017] S4: Inject atmosphere into the atmosphere input pipeline and control it through the control valve;

[0018] S5: Adjust the air volume and air pressure of the atmosphere input into the roller kiln according to the real-time situation inside the roller kiln through the atmosphere pressure regulating device.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] By adding heat exchange tubes to the transition section of the roller kiln during natural cooling, the heat exchange tubes absorb the residual heat from the natural cooling stage of the roller kiln and raise its temperature. When it is necessary to inject atmosphere into the roller kiln, two sets of connecting devices are installed at both ends of the atmosphere pressure regulating device. One end of the atmosphere pressure regulating device is connected to the heat exchange tube through the connecting device, and the other end of the atmosphere pressure regulating device is connected to the atmosphere input pipe through the connecting device. Then, room temperature atmosphere is introduced into the heat exchange tube through the atmosphere input pipe and the atmosphere pressure regulating device. At this time, the room temperature atmosphere absorbs heat and rises in temperature when passing through the heat exchange tube, and finally enters the roller kiln, thereby reducing kiln energy consumption and improving the cooling effect of sintered materials.

[0021] Since the temperature of the injected atmosphere is generally the room temperature, the injected atmosphere needs to absorb a lot of heat to raise its temperature. The heat exchange tube can absorb the residual heat in the natural cooling stage of the roller kiln and raise its temperature, thereby increasing the temperature of the atmosphere entering the roller kiln and reducing the energy consumption of the roller kiln. The atmosphere pressure regulating device can regulate the air pressure and air volume of the injected atmosphere, and the connection device facilitates the disassembly and replacement of the atmosphere input pipeline. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the external structure of the atmosphere pressure regulating device in this invention;

[0024] Figure 3 This is a schematic diagram of an explosion of the atmosphere pressure regulating device in this invention;

[0025] Figure 4 This is a three-dimensional structural diagram of the fan blade mounting bracket in this invention;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the adjustable fan blade unit in this invention;

[0027] Figure 6 This is a schematic diagram of the cross-sectional structure of the fixed sleeve in this invention;

[0028] Figure 7 This is a schematic diagram of the lock control unit structure of the present invention;

[0029] Figure 8 In this invention Figure 7 Schematic diagram of the structure at point A in the middle;

[0030] Figure 9 In this invention Figure 7 Schematic diagram of the structure at point B.

[0031] In the diagram: 1. Roller kiln; 2. Heat exchange tube; 3. Connecting device; 4. Atmosphere pressure regulating device; 5. Atmosphere input pipe; 6. Control valve; 7. Drive sleeve; 8. Guide and pressurization sleeve one; 9. Guide and pressurization sleeve two; 10. Guide vane; 11. Atmosphere port one; 12. Atmosphere port two; 13. Fixing ring; 14. Adjustable fan blade unit; 15. Drive motor one; 16. Heat sink; 17. Fan blade mounting bracket; 18. Rotating shaft; 19. Fan blade; 20. First connecting rod; 21. Rotating handle; 22. Fixing sleeve; 23. Thread; 24. Threaded rod; 25. Limiting ring 26. Threaded sleeve; 27. Third connecting rod; 28. Locking rod; 29. ​​Through groove; 30. Positioning rod; 31. Bearing; 32. Pull rope; 33. Semicircular inner ring; 34. Fixed outer ring; 35. Locking control unit; 36. Safety reset unit; 37. Handle lever; 38. Tensioning wheel; 39. Control box; 40. Fixed pulley; 41. Second connecting rod; 42. Empty groove one; 43. Connecting spring one; 44. Trapezoidal pressure block; 45. Arc-shaped rubber pad; 46. Telescopic rod; 47. Connecting spring two; 48. Fixing plate; 49. Empty groove two; 50. Connecting spring three; 51. Through hole. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Example 1

[0036] Please see Figure 1 The present invention provides a technical solution, comprising: a roller kiln 1, a heat exchange tube 2 installed inside the roller kiln 1, an atmosphere pressure regulating device 4 connected at one end to the heat exchange tube 2 via a connecting device 3, and the other end of the atmosphere pressure regulating device 4 connected to an atmosphere input pipe 5, wherein a control valve 6 is provided in the middle of the atmosphere input pipe 5.

[0037] Preferably, a waste heat recovery method for an atmosphere heating device in a roller kiln, used to control an atmosphere heating device for a roller kiln, includes the following steps:

[0038] S1: Install two sets of connecting devices 3 at both ends of the atmosphere pressure regulating device 4;

[0039] S2: Connect one end of the atmosphere pressure regulating device 4 to the heat exchange tube 2 via the connecting device 3;

[0040] S3: Connect the other end of the atmosphere pressure regulating device 4 to the atmosphere input pipe 5 via the connecting device 3;

[0041] S4: Inject atmosphere into atmosphere input pipe 5 and control it through control valve 6;

[0042] S5: Adjust the air volume and air pressure of the atmosphere input into the roller kiln through the atmosphere pressure regulating device 4 according to the real-time situation inside the roller kiln.

[0043] The working principle and beneficial effects of the above technical solution are as follows: By adding a heat exchange tube 2 to the transition section of the roller kiln 1 during natural cooling, the heat exchange tube 2 absorbs the residual heat in the natural cooling stage of the roller kiln 1 and raises its temperature. When it is necessary to inject atmosphere into the roller kiln 1, two sets of connecting devices 3 are installed at both ends of the atmosphere pressure regulating device 4. One end of the atmosphere pressure regulating device 4 is connected to the heat exchange tube 2 through the connecting device 3, and the other end of the atmosphere pressure regulating device 4 is connected to the atmosphere input pipe 5 through the connecting device 3. Then, room temperature atmosphere is input into the heat exchange tube 2 through the atmosphere input pipe 5 and the atmosphere pressure regulating device 4. At this time, the room temperature atmosphere will absorb heat and rise in temperature when passing through the heat exchange tube 2, and finally enter the roller kiln 1, thereby reducing the kiln energy consumption and improving the cooling effect of the sintered material.

[0044] Since the temperature of the injected atmosphere is generally the room temperature, the injected atmosphere needs to absorb a lot of heat to raise its temperature. The heat exchange pipe 2 can absorb the residual heat in the natural cooling stage of the roller kiln 1 and raise its temperature, thereby increasing the temperature of the atmosphere entering the roller kiln 1 and reducing the energy consumption of the roller kiln. The atmosphere pressure regulating device 4 can regulate the air pressure and air volume of the injected atmosphere. The connection device 3 facilitates the disassembly and replacement of the atmosphere input pipe 5.

[0045] Example 2

[0046] Based on Example 1, please refer to Figure 2-6 The atmosphere pressure regulating device 4 includes: a drive sleeve 7, a flow-guiding and pressure-boosting sleeve 1 8 and a flow-guiding and pressure-boosting sleeve 2 9. The two ends of the drive sleeve 7 are respectively installed with a number of bolts to the flow-guiding and pressure-boosting sleeve 1 8 and the flow-guiding and pressure-boosting sleeve 2 9. A number of flow-guiding blades 10 are fixedly provided on the inner wall of the drive sleeve 7. The drive motor 1 15 is located inside the drive sleeve 7 and is fixedly connected to the number of flow-guiding blades 10. A number of heat sinks 16 are provided on the side of the drive motor 1 15 away from the output shaft.

[0047] Preferably, the first flow guiding and pressurizing sleeve 8 has an air inlet 11 at the end away from the driving sleeve 7, the fixing ring 13 is fixedly connected to the inner wall of the first flow guiding and pressurizing sleeve 8, and an adjustable fan blade unit 14 is installed inside the fixing ring 13, and the second flow guiding and pressurizing sleeve 9 has an air inlet 12 at the end away from the driving sleeve 7.

[0048] Preferably, air inlet 11 is connected to heat exchange pipe 2 via connecting device 3, and air inlet 12 is connected to air input pipe 5 via connecting device 3.

[0049] Preferably, the adjustable fan blade unit 14 includes: a fan blade mounting frame 17, which is fixedly connected to the output shaft of the drive motor 15. The outer wall of the fan blade mounting frame 17 is provided with a plurality of threaded holes, and a plurality of fan blades 19 are installed one by one with the plurality of threaded holes on the outer wall of the fan blade mounting frame 17 through a fixing sleeve 22.

[0050] Preferably, the fan blade 19 is fixedly connected to the fixed sleeve 22, and a thread 23 is provided around the outer wall of the fixed sleeve 22. One end of the first connecting rod 20 is fixedly connected to the threaded rod 24, and the other end of the first connecting rod 20 is movably extended from the fixed sleeve 22 and fixedly connected to a rotating handle 21. The limiting ring 25 is fixedly sleeved on the outer wall of the first connecting rod 20, and the threaded sleeve 26 is movably sleeved on the outer wall of the threaded rod 24. One end of the third connecting rod 27 is hinged to the threaded sleeve 26, and the other end of the third connecting rod 27 is hinged to the locking rod 28. The fixed sleeve 22 is provided with several through grooves 29, and the locking rod 28 is placed in the through grooves 29. One end of the positioning rod 30 is fixedly connected to the inner wall of the fixed sleeve 22, and the other end of the positioning rod 30 is connected to the threaded rod 24 through a bearing 31.

[0051] The working principle and beneficial effects of the above technical solution are as follows: During use, the drive motor 15 drives the adjustable fan blade unit 14 to rotate at high speed. The atmosphere enters through the atmosphere port 11, and after being pressurized by the adjustable fan blade unit 14, it is then transported to the heat exchange tube 2 through the channel formed between multiple sets of guide vanes 10 and the atmosphere port 12 for heat exchange and heating. When it is necessary to change the air pressure and air volume of the input atmosphere, the fan blade 19 with the fixed sleeve 22 is screwed into several threaded holes on the outer wall of the fan blade mounting bracket 17 according to the actual needs. The thread 23 on the outer wall of the fixed sleeve 22 facilitates the installation and removal of the fan blade 19 and the fan blade mounting bracket 17. Then, the rotating handle 2 is turned. 1. The first connecting rod 20 is driven to rotate. At the same time, the first connecting rod 20 drives the threaded rod 24 to rotate. At this time, the threaded sleeve 26 moves along the threaded rod 24 away from the limiting ring 25, and through the third connecting rod 27, the locking rod 28 is pushed outward through the through groove 29 until the locking rod 28 abuts against the inner wall of the fan blade mounting bracket 17. The expansion and contraction of the locking rod 28 makes it easier to disassemble and install the fan blade 19 on the fan blade mounting bracket 17, and makes it easier to increase or decrease the number of fan blades 19. Since the fixing sleeve 22 is connected to the fan blade mounting bracket 17 through the thread 23, when it is necessary to adjust the angle of the fan blade 19, it is only necessary to twist the fixing sleeve 22.

[0052] Since the air volume is mainly affected by the angle of the fan blades and the speed of the motor, generally speaking, the more fan blades a fan has, the better its air delivery effect, because more fan blades can cut the "wind" into smaller pieces, making the blown air softer. Generally speaking, the larger the angle of the blades, the greater the air volume. Therefore, by changing the angle of the fan blades 19, the air intake volume can be changed.

[0053] The more fan blades there are, the lower the wind pressure and the less noise they produce. The fewer fan blades there are, the higher the wind pressure. It is also necessary to consider the characteristics of rotational balance. Generally, fan blades are odd-numbered, while even-numbered blades are prone to resonance during rotation, which can damage the fan blades. Therefore, the intake air pressure can be controlled by increasing or decreasing the number of fan blades.

[0054] Since different air volume and air pressure directly affect production efficiency and product quality, changing the air volume and air pressure of the air intake through the atmosphere pressure regulating device 4 can improve production efficiency and product quality.

[0055] Example 3

[0056] Based on any one of Examples 1-2, please refer to Figure 7-9 The connecting device 3 includes a semi-circular inner ring 33 and a fixed outer ring 34. Two sets of semi-circular inner rings 33 are disposed within the fixed outer ring 34, and the two sets of semi-circular inner rings 33 are rotatably connected by a rotating shaft 18. The fixed outer ring 34 is fixedly connected to the atmosphere pressure regulating device 4. Several locking control units 35 are arranged around the fixed outer ring 34. Several sets of safety reset units 36 are installed between the semi-circular inner ring 33 and the fixed outer ring 34. The control box 39 is fixedly connected to the outer wall of the fixed outer ring 34. One end of the handle 37 is rotatably connected to the inner wall of the control box 39, and the other end of the handle 37 extends movably out of the control box 39. The tightening wheel 38 is fixedly sleeved on the outer wall of the handle 37. Two sets of fixed pulleys 40 are fixedly connected to the outer wall of the fixed outer ring 34 and are symmetrically arranged on both sides of the control box 39.

[0057] Preferably, the locking control unit 35 includes: a second connecting rod 41, one end of which is provided with a through hole 51, and the other end of which movably passes through the fixed outer ring 34 and extends between the semi-circular inner ring 33 and the fixed outer ring 34. A trapezoidal pressure block 44 is fixedly connected to one end of the second connecting rod 41 extending into the fixed outer ring 34. An arc-shaped rubber pad 45 is fixedly provided on the trapezoidal pressure block 44. A plurality of slots 42 are opened in the inner wall of the fixed outer ring 34, and two sets of connecting springs 43 are provided in the slots 42. The two ends of the connecting springs 43 are fixedly connected to the inner wall of the slots 42 and the trapezoidal pressure block 44, respectively. One end of the pull rope 32 is wound around the tightening wheel 38, and the other end of the pull rope 32 passes through the fixed pulley 40 and the through hole 51 and is wound around the tightening wheel 38.

[0058] Preferably, the safety reset unit 36 ​​includes: a telescopic rod 46, a plurality of slots 49 are provided on the outer wall of the semi-circular inner ring 33, one end of the telescopic rod 46 is fixedly connected to the inner wall of the fixed outer ring 34, the other end of the telescopic rod 46 extends into the slot 49 and is fixedly connected to a fixing plate 48, a connecting spring 47 is sleeved on the outer wall of the telescopic rod 46, and both ends of the connecting spring 47 are fixedly connected to the inner wall of the fixed outer ring 34 and the fixing plate 48 respectively, and two sets of connecting springs 50 are provided in the slots 49, and both ends of the connecting springs 50 are fixedly connected to the fixing plate 48 and the inner wall of the slot 49 respectively.

[0059] The working principle and beneficial effects of the above technical solution are as follows: In use, the atmosphere input pipe 5 is inserted directly into the two sets of semi-circular inner rings 33, and then the handle 37 is manually turned to drive the tightening wheel 38 to rotate. At this time, the pull rope 32 continues to wrap around the tightening wheel 38 and pulls several sets of second connecting rods 41 to push the trapezoidal pressure block 44 towards the semi-circular inner ring 33 until the two sets of semi-circular inner rings 33 rotate around the rotating shaft 18 under the action of external force and tighten the atmosphere input pipe 5. The arc-shaped rubber pad 45 can increase the friction.

[0060] Meanwhile, as the two sets of semicircular inner rings 33 rotate around the rotating shaft 18, they will extend the telescopic rod 46 by connecting spring three 50 and fixing plate 48. At this time, connecting spring two 47 will stretch and accumulate kinetic energy. Then, the handle rod 37 will be fixed by bolts, thus completing the connection between the atmosphere input pipe 5 and the atmosphere pressure regulating device 4. When it is necessary to disassemble and replace the atmosphere input pipe 5, simply release the handle rod 37. Under the action of connecting spring one 43, connecting spring two 47 and connecting spring three 50, the trapezoidal pressure block 44 will reset, so that the two sets of semicircular inner rings 33 are no longer under pressure, and the atmosphere input pipe 5 can be pulled out. Similarly, the atmosphere pressure regulating device 4 and the heat exchange tube 2 are disassembled and connected in the same way. In addition, when subjected to shaking and collision, the fixed outer ring 34 can also be buffered by the safety reset unit 36, thereby protecting the atmosphere input pipe 5.

[0061] The connection device 3 facilitates the disassembly and replacement of the atmosphere input pipe 5, and also provides protection, making it simple and convenient.

[0062] 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 in all respects as exemplary and non-limiting, 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.

Claims

1. An atmosphere heating device for a roller kiln, utilizing the waste heat from the natural cooling stage within the roller kiln, characterized in that: include: Roller kiln (1), heat exchange tube (2) is installed inside roller kiln (1), one end of atmosphere pressure regulating device (4) is connected to heat exchange tube (2) through connecting device (3), the other end of atmosphere pressure regulating device (4) is connected to atmosphere input pipe (5), and a control valve (6) is provided in the middle of atmosphere input pipe (5); atmosphere pressure regulating device (4) includes: drive sleeve (7), flow boosting sleeve one (8) and flow boosting sleeve two (9), the two ends of drive sleeve (7) are respectively installed with several bolts to flow boosting sleeve one (8) and flow boosting sleeve two (9), several flow guide blades (10) are fixedly provided on the inner wall of drive sleeve (7), drive motor one (15) is located inside drive sleeve (7) and fixedly connected to several flow guide blades (10), and several heat sinks (16) are provided on the side of drive motor one (15) away from the output shaft. The first flow booster sleeve (8) has an air port (11) at one end away from the drive sleeve (7). The fixing ring (13) is fixedly connected to the inner wall of the first flow booster sleeve (8), and an adjustable fan blade unit (14) is installed inside the fixing ring (13). The second flow booster sleeve (9) has an air port (12) at one end away from the drive sleeve (7). Atmosphere port 1 (11) is connected to heat exchange tube (2) via connecting device (3), and atmosphere port 2 (12) is connected to atmosphere input pipe (5) via connecting device (3); The adjustable fan blade unit (14) includes: a fan blade mounting bracket (17), which is fixedly connected to the output shaft of a drive motor (15). The outer wall of the fan blade mounting bracket (17) is provided with several threaded holes, and several fan blades (19) are installed one by one with the several threaded holes on the outer wall of the fan blade mounting bracket (17) through a fixing sleeve (22). The fan blade (19) is fixedly connected to the fixed sleeve (22), and a thread (23) is provided around the outer wall of the fixed sleeve (22). One end of the first connecting rod (20) is fixedly connected to the threaded rod (24), and the other end of the first connecting rod (20) is connected to the fixed sleeve (22) and a rotating handle (21) is fixedly connected. The limiting ring (25) is fixedly sleeved on the outer wall of the first connecting rod (20), and the threaded sleeve (26) is movably sleeved on the outer wall of the threaded rod (24). One end of the third connecting rod (27) is hinged to the threaded sleeve (26), and the other end of the third connecting rod (27) is hinged to the locking rod (28). The fixed sleeve (22) is provided with several through slots (29), and the locking rod (28) is placed in the through slots (29). One end of the positioning rod (30) is fixedly connected to the inner wall of the fixed sleeve (22), and the other end of the positioning rod (30) is connected to the threaded rod (24) through the bearing (31). The connecting device (3) includes a semi-circular inner ring (33) and a fixed outer ring (34). Two sets of semi-circular inner rings (33) are disposed inside the fixed outer ring (34), and the two sets of semi-circular inner rings (33) are rotatably connected by a rotating shaft (18). The fixed outer ring (34) is fixedly connected to the atmosphere pressure regulating device (4). Several locking control units (35) are disposed around the fixed outer ring (34), and are installed between the semi-circular inner ring (33) and the fixed outer ring (34). There are several sets of safety reset units (36), the control box (39) is fixedly connected to the outer wall of the fixed outer ring (34), one end of the handle (37) is rotatably connected to the inner wall of the control box (39), the other end of the handle (37) extends movably out of the control box (39), the tightening wheel (38) is fixedly sleeved on the outer wall of the handle (37), and two sets of fixed pulleys (40) are fixedly connected to the outer wall of the fixed outer ring (34) and are symmetrically arranged on both sides of the control box (39); The locking control unit (35) includes: a second link (41), one end of which is provided with a through hole (51), the other end of which movably passes through the fixed outer ring (34) and extends between the semi-circular inner ring (33) and the fixed outer ring (34), and a trapezoidal pressure block (44) is fixedly connected to one end of the second link (41) extending into the fixed outer ring (34), and an arc-shaped rubber pad (4) is fixedly provided on the trapezoidal pressure block (44). 5) The inner wall of the fixed outer ring (34) is provided with several empty slots (42), and two sets of connecting springs (43) are provided in the empty slots (42). The two ends of the connecting springs (43) are fixedly connected to the inner wall of the empty slots (42) and the trapezoidal pressure block (44) respectively. One end of the pull rope (32) is wrapped around the tightening wheel (38), and the other end of the pull rope (32) passes through the fixed pulley (40) and the through hole (51) and is wrapped around the tightening wheel (38). The safety reset unit (36) includes: a telescopic rod (46), a number of slots (49) are provided on the outer wall of the semi-circular inner ring (33), one end of the telescopic rod (46) is fixedly connected to the inner wall of the fixed outer ring (34), the other end of the telescopic rod (46) extends into the slot (49) and is fixedly connected to a fixing plate (48), a connecting spring (47) is sleeved on the outer wall of the telescopic rod (46), and the two ends of the connecting spring (47) are fixedly connected to the inner wall of the fixed outer ring (34) and the fixing plate (48) respectively, and two sets of connecting springs (50) are provided in the slot (49), and the two ends of the connecting springs (50) are fixedly connected to the fixing plate (48) and the inner wall of the slot (49) respectively.

2. A waste heat recovery method for controlling an atmosphere heating device for a roller kiln as described in claim 1, characterized in that: Includes the following steps: S1: Install two sets of connecting devices (3) at both ends of the atmosphere pressure regulating device (4); S2: Connect one end of the atmosphere pressure regulating device (4) to the heat exchange tube (2) through the connecting device (3); S3: Connect the other end of the atmosphere pressure regulating device (4) to the atmosphere input pipe (5) through the connecting device (3); S4: Inject atmosphere into the atmosphere input pipe (5) and control it through the control valve (6); S5: Adjust the air volume and air pressure of the atmosphere input into the roller kiln by means of the atmosphere pressure regulating device (4) according to the real-time situation inside the roller kiln.

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