Pyrolysis kiln

Abstract

The invention discloses a pyrolysis kiln, and belongs to the field of pyrolysis kilns, the pyrolysis kiln comprises a first heating assembly and a second heating assembly, the first heating assembly comprises an inner cylinder and an outer cylinder, the outer cylinder sleeves the outer side of the inner cylinder, a first heating channel is formed between the inner cylinder and the outer cylinder, and the first heating channel is used for introducing flue gas to heat materials in the inner cylinder; the second heating assembly comprises a heating pipe, the two ends of the heating pipe are connected to the inner wall of the inner cylinder, a second heating channel is formed in the heating pipe, a first through hole communicating with one end of the first heating channel and one end of the second heating channel is formed in the inner cylinder, and a second through hole communicating with the other end of the first heating channel and the other end of the second heating channel is formed in the inner cylinder. The two ends of the heating pipe are arranged at intervals in the axial direction of the inner cylinder. And by arranging the heating pipe, a part of hot smoke is introduced into the inner cylinder to fully heat the materials, so that the stirring of the materials is enhanced while the heat exchange area is increased, the heat exchange efficiency is improved, and the energy consumption can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pyrolysis kilns, and in particular to a pyrolysis kiln. Background Art

[0002] A pyrolysis kiln is a device that uses heat to decompose organic matter under oxygen-free conditions. Usually, an indirectly heated pyrolysis rotary kiln includes an inner cylinder and an outer cylinder, and a flue gas channel is formed between the outer cylinder and the inner cylinder. One end of the flue gas channel is a flue gas inlet, and the other end is a flue gas outlet. Hot flue gas enters from the flue gas inlet, passes through the flue gas channel, and is discharged from the flue gas outlet; one end of the inner cylinder is a material inlet, and the other end is a material outlet. The material enters from the material inlet and is discharged from the material outlet. This type of pyrolysis rotary kiln has a low overall heat transfer efficiency and high energy consumption. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a pyrolysis kiln, which solves the problems of low overall heat transfer efficiency and high energy consumption of the existing pyrolysis rotary kiln.

[0004] A pyrolysis kiln according to an embodiment of the present invention comprises:

[0005] A first heating component comprises an inner cylinder and an outer cylinder, wherein the outer cylinder is sleeved on the outer side of the inner cylinder, and a first heating channel is formed between the inner cylinder and the outer cylinder, and the first heating channel is used to pass smoke to heat the material in the inner cylinder;

[0006] The second heating assembly comprises a heating tube, both ends of which are connected to the inner wall of the inner tube, a second heating channel is arranged in the heating tube, a first through hole connecting one end of the first heating channel and the second heating channel is arranged on the inner tube, a second through hole connecting the other end of the first heating channel and the second heating channel is arranged on the inner tube, and both ends of the heating tube are arranged at intervals along the axial direction of the inner tube.

[0007] A pyrolysis kiln according to an embodiment of the present invention has at least the following beneficial effects:

[0008] By setting up a heating pipe, a part of the hot flue gas is introduced into the inner tube to fully heat the material, which increases the heat exchange area and strengthens the stirring of the material, thereby improving the heat exchange efficiency and reducing energy consumption.

[0009] According to some embodiments of the present invention, the heating tube includes a straight tube section and two curved tube sections connected at both ends of the straight tube section, the two curved tube sections are connected to the inner wall of the inner tube, the straight tube section and the inner wall of the inner tube are spaced apart, and the axial direction of the straight tube section is consistent with the axial direction of the inner tube.

[0010] According to some embodiments of the present invention, a plurality of the heating tubes are provided, and the plurality of the heating tubes are arranged in a circular array around the axial direction of the inner tube, and a plurality of the first through holes and a plurality of the second through holes are correspondingly provided, and the centers of the plurality of the first through holes are located on the same cross-section of the inner tube, and the centers of the plurality of the second through holes are located on the same cross-section of the inner tube.

[0011] According to some embodiments of the present invention, the pyrolysis kiln also includes a first baffle assembly and a second baffle assembly for slowing down the flow rate of flue gas in the first heating channel, the first baffle assembly and the second baffle assembly are arranged in the first heating channel, the first baffle assembly and the second baffle assembly are located between the first through hole and the second through hole, the first baffle assembly is arranged close to the first through hole, and a first air passage for flue gas to pass through is arranged on the first baffle assembly, the second baffle assembly is arranged close to the second through hole, and a second air passage for flue gas to pass through is arranged on the second baffle assembly.

[0012] According to some embodiments of the present invention, the first baffle assembly includes a first baffle plate and a second baffle plate, the first baffle plate is provided with a third through hole, the second baffle plate is provided with a fourth through hole, the first baffle plate connects the inner cylinder and the outer cylinder, the second baffle plate is rotatable relative to the first baffle plate, and when the third through hole and the fourth through hole have an overlapping portion, the connection between the third through hole and the fourth through hole forms the first air passage; when the third through hole and the fourth through hole are staggered, the first air passage is closed.

[0013] According to some embodiments of the present invention, an annular protrusion is provided on the inner ring of the first baffle plate, the second baffle plate is sleeved on the annular protrusion, and the second baffle plate is rotatably connected to the annular protrusion.

[0014] According to some embodiments of the present invention, the first baffle is arranged in a ring shape, a plurality of the third through holes are arranged, and a distance between two adjacent third through holes is greater than the aperture of the third through hole;

[0015] The second baffle is arranged in an annular shape, a plurality of the fourth through holes are arranged, a distance between two adjacent fourth through holes is greater than the aperture of the fourth through hole, the aperture of the fourth through hole is consistent with the aperture of the third through hole, and the number of the fourth through holes is consistent with the number of the third through holes;

[0016] When one of the third through holes completely overlaps with one of the fourth through holes, multiple of the third through holes completely overlap with multiple of the fourth through holes; when one of the third through holes completely staggers with one of the fourth through holes, multiple of the third through holes completely staggers with multiple of the fourth through holes.

[0017] According to some embodiments of the present invention, the first baffle assembly further includes a driving assembly, the driving assembly is mounted on the outer cylinder, the driving assembly is transmission-connected to the second baffle plate, and the driving assembly is used to drive the second baffle plate to rotate.

[0018] According to some embodiments of the present invention, a tooth portion is provided on the outer ring edge of the second baffle plate, the drive assembly includes a drive motor, the output shaft of the drive motor is connected to a gear, the gear is meshed with the tooth portion, and the drive motor is used to drive the second baffle plate to rotate via the gear and the tooth portion.

[0019] According to some embodiments of the present invention, the tooth portion is arranged in an arc shape, and the driving motor drives the gear to switch between clockwise rotation and counterclockwise rotation.

[0020] According to some embodiments of the present invention, the pyrolysis kiln further includes a cleaning assembly, which is disposed in the first heating channel, and includes a plurality of cleaning rods, wherein the plurality of cleaning rods are connected to the inner cylinder, and brushes are provided on the cleaning rods, wherein the brushes abut against a side of the second baffle plate close to the first through hole, and the first baffle plate is disposed on a side of the second baffle plate away from the first through hole.

[0021] According to some embodiments of the present invention, the cleaning assembly includes a baffle ring, the plurality of cleaning rods are connected to the baffle ring, the baffle ring is detachably connected to the annular protrusion, and the outer diameter of the baffle ring is greater than the inner diameter of the second baffle plate.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 It is a schematic structural diagram of a pyrolysis kiln according to an embodiment of the present invention;

[0025] Figure 2 is a cross-sectional view of a pyrolysis kiln according to an embodiment of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the inner cylinder and the second heating assembly of the pyrolysis kiln according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic structural diagram of the first baffle assembly of the pyrolysis kiln in an embodiment of the present invention after removing the driving assembly;

[0028] Figure 5 It is a schematic structural diagram of a first baffle of a pyrolysis kiln according to an embodiment of the present invention;

[0029] Figure 6 It is a schematic structural diagram of a second baffle of a pyrolysis kiln according to an embodiment of the present invention;

[0030] Figure 7 It is a schematic structural diagram of a cleaning component of a pyrolysis kiln according to an embodiment of the present invention.

[0031] Figure Number:

[0032] 100, first heating assembly; 110, inner cylinder; 111, first through hole; 112, second through hole; 120, outer cylinder; 130, first heating channel;

[0033] 200, second heating assembly; 210, heating tube; 211, second heating channel; 212, straight pipe section; 213, curved pipe section;

[0034] 300, first baffle assembly; 310, first baffle plate; 311, third through hole; 312, annular protrusion; 320, second baffle plate; 321, fourth through hole; 322, tooth portion; 330, drive assembly; 331, gear;

[0035] 400, a second flow blocking assembly;

[0036] 500, cleaning assembly; 510, cleaning rod; 520, cleaning brush; 530, retaining ring. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] See also Figure 1 , Figure 2 and Figure 3 A pyrolysis kiln according to an embodiment of the present invention comprises a first heating assembly 100 and a second heating assembly 200. The first heating assembly 100 comprises an inner cylinder 110 and an outer cylinder 120. The outer cylinder 120 is sleeved outside the inner cylinder 110. A first heating channel 130 is formed between the inner cylinder 110 and the outer cylinder 120. The first heating channel 130 is used to pass flue gas to heat the material in the inner cylinder 110. The second heating assembly 200 comprises a heating tube 210. Both ends of the heating tube 210 are connected to the inner wall of the inner cylinder 110. A second heating channel 211 is arranged in the heating tube 210. The inner cylinder 110 is provided with a first through hole 111 and a second through hole 112. The first through hole 111 connects one end of the first heating channel 130 and the second heating channel 211. The second through hole 112 connects the other end of the first heating channel 130 and the second heating channel 211. The two ends of the heating tube 210 are arranged at intervals along the axial direction of the inner cylinder 110.

[0041] One end of the first heating channel 130 is a smoke inlet, and the other end is a smoke outlet. Hot smoke enters from the smoke inlet, passes through the first heating channel 130, and is discharged from the smoke outlet. One end of the inner tube 110 is a material inlet, and the other end is a material outlet. The material inlet is close to the smoke outlet, and the material outlet is close to the smoke inlet. The material enters from the material inlet and is discharged from the material outlet. By setting the heating pipe 210, a part of the hot smoke is introduced into the inner tube 110 to fully heat the material, which increases the heat exchange area and strengthens the stirring of the material, improves the heat exchange efficiency, and can reduce energy consumption.

[0042] In some embodiments, see Figure 1 , Figure 2 and Figure 3The heating tube 210 includes a straight tube section 212 and two curved tube sections 213, the two curved tube sections 213 are connected at both ends of the straight tube section 212, and the two curved tube sections 213 are connected to the inner wall of the inner tube 110. The straight tube section 212 is spaced apart from the inner wall of the inner tube 110, and the axial direction of the straight tube section 212 is consistent with the axial direction of the inner tube 110. The straight tube section 212 is connected to the inner tube 110 through the two curved tube sections 213. The heating tube 210 has a simple overall structure and is easy to process. It increases the heat exchange area while strengthening the stirring of the material, thereby improving the heat exchange efficiency.

[0043] In some embodiments, see Figure 1 , Figure 2 and Figure 3 , multiple heating tubes 210 are provided, and multiple heating tubes 210 are arranged in a circular array around the axial direction of the inner tube 110. Multiple first through holes 111 and second through holes 112 are correspondingly provided, and the centers of the multiple first through holes 111 are located on the same cross-section of the inner tube 110, and the centers of the multiple second through holes 112 are located on the same cross-section of the inner tube 110. Multiple heating tubes 210 are arranged inside the inner tube 110, which increases the heat exchange area while strengthening the stirring of the material and improving the heat exchange efficiency. Multiple heating tubes 210 are arranged in a circular array around the axial direction of the inner tube 110, and the centers of the multiple first through holes 111 are located on the same cross-section of the inner tube 110, so that each heating tube 210 is heated evenly.

[0044] In some embodiments, see Figure 1 and Figure 2 The pyrolysis kiln further includes a first baffle assembly 300 and a second baffle assembly 400, which are used to slow down the flue gas flow rate of the first heating channel 130. The first baffle assembly 300 and the second baffle assembly 400 are arranged in the first heating channel 130, and the first baffle assembly 300 and the second baffle assembly 400 are located between the first through hole 111 and the second through hole 112. The first baffle assembly 300 is arranged close to the first through hole 111, and the second baffle assembly 400 is arranged close to the second through hole 112. The first baffle assembly 300 is provided with a first air passage, and the first air passage is used for flue gas to pass through. The second baffle assembly 400 is provided with a second air passage, and the second air passage is used for flue gas to pass through.

[0045] The hot flue gas enters from the flue gas inlet, passes through the first heating channel 130, and is discharged from the flue gas outlet; the first baffle assembly 300 and the second baffle assembly 400 are arranged in the first heating channel 130 to slow down the flue gas flow rate in the first heating channel 130; it is ensured that the hot flue gas can be diverted into the second heating channel 211, and a part of the hot flue gas is introduced into the inner tube 110 to fully heat the material, thereby increasing the heat exchange area and strengthening the stirring of the material, thereby improving the heat exchange efficiency and reducing energy consumption.

[0046] In some embodiments, see Figure 2 and Figure 4 The first baffle assembly 300 includes a first baffle plate 310 and a second baffle plate 320. Figure 5 The first baffle plate 310 is provided with a third through hole 311, and the first baffle plate 310 connects the inner cylinder 110 and the outer cylinder 120. Figure 6 , a fourth through hole 321 is provided on the second baffle plate 320, and the second baffle plate 320 is rotatable relative to the first baffle plate 310. When the third through hole 311 and the fourth through hole 321 have an overlapping portion, the connection between the third through hole 311 and the fourth through hole 321 forms a first air passage; when the third through hole 311 and the fourth through hole 321 are staggered, the first air passage is closed. The first baffle plate 310 is fixedly connected in the first heating channel 130, and the second baffle plate 320 is rotatable, so that the area of ​​the overlapping portion between the third through hole 311 and the fourth through hole 321 can be adjusted, and the cross-sectional area of ​​the first air passage can be adjusted, thereby adjusting the smoke passing speed of the first heating channel 130.

[0047] The structure of the second baffle assembly 400 is consistent with that of the first baffle assembly 300 .

[0048] In some embodiments, see Figure 4 and Figure 5 The first baffle plate 310 is provided with an annular protrusion 312 on its inner ring, the second baffle plate 320 is sleeved on the annular protrusion 312, and the second baffle plate 320 is rotatably connected to the annular protrusion 312. The first baffle plate 310 can be welded to the outer wall of the inner cylinder 110, and the second baffle plate 320 is rotatably connected to the annular protrusion 312, which can reduce the friction between the second baffle plate 320 and the inner cylinder 110 and avoid the wear of the inner cylinder 110.

[0049] In some embodiments, see Figure 4 , Figure 5 and Figure 6 The first baffle plate 310 is arranged in an annular shape, a plurality of third through holes 311 are arranged, and the distance between two adjacent third through holes 311 is greater than the aperture of the third through hole 311. The second baffle plate 320 is arranged in an annular shape, a plurality of fourth through holes 321 are arranged, and the distance between two adjacent fourth through holes 321 is greater than the aperture of the fourth through hole 321. The aperture of the fourth through hole 321 is consistent with the aperture of the third through hole 311, and the number of the fourth through holes 321 is consistent with the number of the third through holes 311.

[0050] When a third through hole 311 completely overlaps with a fourth through hole 321, multiple third through holes 311 completely overlap with multiple fourth through holes 321; when a third through hole 311 completely staggers with a fourth through hole 321, multiple third through holes 311 completely staggers with multiple fourth through holes 321.

[0051] The third through holes 311 and the fourth through holes 321 are arranged correspondingly, so that when the second baffle plate 320 is rotated, the overlap area between all the third through holes 311 and all the fourth through holes 321 can be adjusted, so that the total cross-sectional area of ​​the first air passage can be linearly changed. The first baffle plate 310 and the second baffle plate 320 can be connected together first, and then the third through holes 311 and the fourth through holes 321 can be processed together, which is convenient for processing.

[0052] In some embodiments, see Figure 1 , Figure 2 and Figure 4 The first baffle assembly 300 further includes a driving assembly 330, which is mounted on the outer cylinder 120 and is in transmission connection with the second baffle plate 320, and is used to drive the second baffle plate 320 to rotate. The driving assembly 330 may be a servo motor, which drives the second baffle plate 320 to rotate, thereby adjusting the overlap area between the third through hole 311 and the fourth through hole 321, and adjusting the flue gas flow rate in the first heating channel 130.

[0053] In some embodiments, see Figure 2 , Figure 4 and Figure 6 The outer edge of the second baffle plate 320 is provided with a tooth portion 322, and the driving assembly 330 includes a driving motor, the output shaft of the driving motor is connected to the gear 331, the gear 331 is meshed with the tooth portion 322, and the driving motor is used to drive the second baffle plate 320 to rotate through the gear 331 and the tooth portion 322. The driving motor can be a servo motor, the gear 331 is meshed with the tooth portion 322 on the second baffle plate 320, and the driving motor drives the second baffle plate 320 to rotate through the gear 331, thereby adjusting the size of the overlap area between the third through hole 311 and the fourth through hole 321, and adjusting the flue gas flow rate in the first heating channel 130.

[0054] In some embodiments, see Figure 2 , Figure 4 and Figure 6The tooth portion 322 is arranged in an arc shape, and the driving motor drives the gear 331 to switch between clockwise rotation and counterclockwise rotation. The tooth portion 322 has a short overall length, is easy to process, and can save costs. The driving motor drives the gear 331 to rotate clockwise, and the corresponding second baffle plate 320 rotates counterclockwise. After the gear 331 abuts against one end of the tooth portion 322, the driving motor drives the gear 331 to rotate counterclockwise, and the corresponding second baffle plate 320 rotates clockwise. The gear 331 is always engaged with the tooth portion 322.

[0055] In some embodiments, see Figure 2 , Figure 4 and Figure 7 The pyrolysis kiln further includes a cleaning assembly 500, which is disposed in the first heating channel 130. The cleaning assembly 500 includes a plurality of cleaning rods 510, which are connected to the inner cylinder 110. A brush 520 is disposed on the cleaning rod 510, and the brush 520 abuts against the side of the second baffle plate 320 close to the first through hole 111, and the first baffle plate 310 is disposed on the side of the second baffle plate 320 away from the first through hole 111. When the side of the first through hole 111 is the smoke inlet, the smoke first contacts the second baffle plate 320, and then passes through the first air passage. After long-term use, dust is easily accumulated on the second baffle plate 320. The second baffle plate 320 can be driven to rotate by a driving motor. When the second baffle plate 320 rotates, the brush 520 on the cleaning rod 510 can sweep and clean the second baffle plate 320.

[0056] The first baffle assembly 300 and the second baffle assembly 400 are both equipped with a cleaning assembly 500 . The cleaning assembly 500 is disposed on a side of the first baffle assembly 300 close to the first through hole 111 , and the cleaning assembly 500 is disposed on a side of the second baffle assembly 400 close to the second through hole 112 .

[0057] In some embodiments, see Figure 4 , Figure 5 and Figure 7 The cleaning assembly 500 includes a baffle ring 530, and a plurality of cleaning rods 510 are connected to the baffle ring 530. The baffle ring 530 is detachably connected to the annular protrusion 312, and the outer diameter of the baffle ring 530 is greater than the inner diameter of the second baffle plate 320. The first baffle plate 310 is welded to the inner cylinder 110, and the second baffle plate 320 is sleeved on the annular protrusion 312. The baffle ring 530 is detachably connected to the annular protrusion 312 by bolts, and the baffle ring 530 can limit the second baffle plate 320 on the annular protrusion 312 to prevent the second baffle plate 320 from falling off.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0059] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pyrolysis kiln, characterized in that: include: A first heating component comprises an inner cylinder and an outer cylinder, wherein the outer cylinder is sleeved on the outer side of the inner cylinder, and a first heating channel is formed between the inner cylinder and the outer cylinder, and the first heating channel is used to pass smoke to heat the material in the inner cylinder; The second heating assembly comprises a heating tube, both ends of which are connected to the inner wall of the inner tube, a second heating channel is arranged in the heating tube, a first through hole connecting one end of the first heating channel and the second heating channel is arranged on the inner tube, a second through hole connecting the other end of the first heating channel and the second heating channel is arranged on the inner tube, and both ends of the heating tube are arranged at intervals along the axial direction of the inner tube.

2. A pyrolysis kiln according to claim 1, characterized in that: The heating tube includes a straight tube section and two curved tube sections connected at both ends of the straight tube section, the two curved tube sections are connected to the inner wall of the inner tube, the straight tube section is spaced apart from the inner wall of the inner tube, and the axial direction of the straight tube section is consistent with the axial direction of the inner tube.

3. A pyrolysis kiln according to claim 1, characterized in that: There are multiple heating tubes, which are arranged in a circular array around the axial direction of the inner tube. There are multiple first through holes and multiple second through holes correspondingly arranged, and the centers of the multiple first through holes are located on the same cross-section of the inner tube, and the centers of the multiple second through holes are located on the same cross-section of the inner tube.

4. A pyrolysis kiln according to claim 1, characterized in that: It also includes a first baffle assembly and a second baffle assembly for slowing down the flow rate of smoke in the first heating channel. The first baffle assembly and the second baffle assembly are arranged in the first heating channel. The first baffle assembly and the second baffle assembly are located between the first through hole and the second through hole. The first baffle assembly is arranged close to the first through hole, and a first air passage for smoke to pass through is arranged on the first baffle assembly. The second baffle assembly is arranged close to the second through hole, and a second air passage for smoke to pass through is arranged on the second baffle assembly.

5. A pyrolysis kiln according to claim 4, characterized in that: The first baffle assembly includes a first baffle plate and a second baffle plate, the first baffle plate is provided with a third through hole, the second baffle plate is provided with a fourth through hole, the first baffle plate connects the inner cylinder and the outer cylinder, the second baffle plate is rotatable relative to the first baffle plate, when the third through hole and the fourth through hole have an overlapping portion, the connection between the third through hole and the fourth through hole forms the first air passage; when the third through hole and the fourth through hole are staggered, the first air passage is closed.

6. A pyrolysis kiln according to claim 5, characterized in that: The first baffle is arranged in an annular shape, a plurality of the third through holes are arranged, and a distance between two adjacent third through holes is greater than the aperture of the third through hole; The second baffle is arranged in an annular shape, a plurality of the fourth through holes are arranged, a distance between two adjacent fourth through holes is greater than the aperture of the fourth through hole, the aperture of the fourth through hole is consistent with the aperture of the third through hole, and the number of the fourth through holes is consistent with the number of the third through holes; When one of the third through holes completely overlaps with one of the fourth through holes, multiple of the third through holes completely overlap with multiple of the fourth through holes; when one of the third through holes completely staggers with one of the fourth through holes, multiple of the third through holes completely staggers with multiple of the fourth through holes.

7. A pyrolysis kiln according to claim 5, characterized in that: The first baffle assembly further includes a driving assembly, which is mounted on the outer cylinder and is drivingly connected to the second baffle plate, and is used to drive the second baffle plate to rotate.

8. A pyrolysis kiln according to claim 7, characterized in that: The outer ring edge of the second baffle plate is provided with a tooth portion, the driving assembly includes a driving motor, the output shaft of the driving motor is connected to a gear, the gear is meshed with the tooth portion, and the driving motor is used to drive the second baffle plate to rotate through the gear and the tooth portion.

9. A pyrolysis kiln according to claim 8, characterized in that: The tooth portion is arranged in an arc shape, and the driving motor drives the gear to switch between clockwise rotation and counterclockwise rotation.

10. A pyrolysis kiln according to claim 5, characterized in that: It also includes a cleaning component, which is arranged in the first heating channel. The cleaning component includes a plurality of cleaning rods, and the plurality of cleaning rods are connected to the inner cylinder. A brush is provided on the cleaning rod, and the brush abuts against the side of the second baffle plate close to the first through hole. The first baffle plate is arranged on the side of the second baffle plate away from the first through hole.

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