A push plate type carbonization tunnel furnace

Abstract

This invention discloses a pusher-plate type charcoal tunnel furnace, designed to promptly remove moisture generated in the drying section, preventing moisture from entering the furnace cavity and ensuring charcoal quality. The technical solution includes: a pusher-plate type charcoal tunnel furnace comprising a furnace body and a furnace cavity within the furnace body. The furnace cavity is sequentially divided into a drying section, a dry distillation section, a calcination section, and a cooling section along its conveying direction. A sliding platform is provided within the furnace cavity, with a first gas collecting groove on the sliding platform. Multiple pusher plates are also included, each with a carbon rod frame containing a sealed chamber for accommodating biomass raw materials. A pushing module is also included at the input end of the furnace body, with a material placement platform between the pushing module and the furnace body. The pushing module pushes the pusher plates on the placement platform onto the sliding platform, arranging them along a first direction and gradually moving them forward. When the pusher plates are in the drying section, they cover the first gas collecting groove. This invention belongs to the field of charcoal production technology.

Description

Technical Field

[0001] This invention belongs to the field of charcoal making technology, and more specifically, relates to a pusher-plate type charcoal making tunnel furnace. Background Technology

[0002] Plum blossom charcoal is formed by carbonizing biomass raw materials. In existing technologies, tunnel furnaces are generally used to achieve carbonization.

[0003] CN207793163U discloses a self-circulating tunnel-type carbonization kiln, which relates to the field of wood processing. It includes: a carbonization kiln body and a circulation system connected to the carbonization kiln body. The carbonization kiln body includes a preheating and drying zone, a pyrolysis zone, an oxidation zone, a reduction zone and a cooling zone. The circulation system includes a waste heat recovery system, a fuel reuse system and a tail gas treatment system.

[0004] This tunnel-type carbonization kiln divides the kiln body into multiple zones. Biomass raw materials pass through each zone sequentially to complete carbonization and cooling processes. However, the kiln body is still interconnected. Therefore, the gases generated by the biomass raw materials at each stage will mix together. In particular, the moisture generated in the preheating and drying zone will also fill the kiln body. After passing through the drying zone, the dried biomass raw materials will absorb the moisture from the flue gas in the pyrolysis zone, causing the biomass raw materials to become damp again, resulting in cracking or loosening and affecting the quality of the charcoal. Summary of the Invention

[0005] The main objective of this invention is to provide a pusher-type charcoal tunnel furnace, which aims to remove moisture generated in the drying section in a timely manner, prevent moisture from entering the furnace cavity, and ensure the quality of charcoal production.

[0006] According to a first aspect of the present invention, a pusher-type charcoal-making tunnel furnace is provided, comprising a furnace body and a furnace cavity located within the furnace body. The furnace cavity is sequentially divided into a drying section, a dry distillation section, a calcination section, and a cooling section along its conveying direction. A sliding platform is provided within the furnace cavity, extending from the input end of the furnace cavity to the output end of the furnace cavity, wherein the extension direction of the sliding platform is a first direction.

[0007] The sliding platform is provided with a first gas collecting groove, which is located in the drying section and extends along a first direction.

[0008] It also includes multiple push plates, each push plate having a carbon rod frame, and the carbon rod frame having a sealed chamber for containing biomass raw materials;

[0009] It also includes a material pushing module located at the input end of the furnace body, and a material placing platform is provided between the material pushing module and the furnace body. The material placing platform is connected to the sliding platform. The pusher plate is placed on the material placing platform, and the material pushing module pushes the pusher plate on the material placing platform onto the sliding platform so that the pusher plate is arranged along the first direction on the sliding platform and gradually moves forward.

[0010] When the pusher plate is in the drying section, the pusher plate will cover the first gas collection groove. The pusher plate is provided with a first through hole that connects the sealed chamber and the first gas collection groove.

[0011] It also includes a first air extraction module, which is connected to a first air collection channel.

[0012] In the aforementioned pusher-type charcoal tunnel furnace, a second gas collection trough is provided on the sliding platform. The second gas collection trough is located in the dry distillation section and extends along the first direction.

[0013] The first gas collecting channel is connected to the second gas collecting channel, and a partition is provided at the connection between the first gas collecting channel and the second gas collecting channel;

[0014] When the pusher plate is in the dry distillation section, the pusher plate will cover the second gas collection groove, and the first through hole connects the sealed chamber and the second gas collection groove.

[0015] It also includes a second air extraction module, which is connected to the second air collection channel.

[0016] In the aforementioned pusher-type charcoal tunnel furnace, the direction that is perpendicular to and horizontal to the first direction is the second direction;

[0017] The push plates are arranged into a push plate group and placed on the material placement platform. The push plate group includes at least two push plates arranged at intervals along a second direction.

[0018] In the aforementioned pusher-type charcoal tunnel furnace, the sliding platform is provided with a guide groove adapted to the pusher plate, the pusher plate extends along a first direction, and the pusher plates are arranged along the first direction in the guide groove;

[0019] The bottom of the guide groove is an inclined surface, which slopes downward from the input end of the furnace cavity to the output end of the furnace cavity.

[0020] In the aforementioned pusher-type charcoal tunnel furnace, the carbon rod frame includes a bottom plate, a sleeve, and a cover. The bottom plate and the sleeve together form an upward-opening receiving chamber. The top of the sleeve is provided with a cover to cover the receiving chamber, thereby forming a sealed chamber.

[0021] The bottom plate has a positioning protrusion on the side facing away from the sleeve. The positioning protrusion is inserted into the first through hole, and the positioning protrusion has a second through hole that connects the sealed chamber and the first through hole.

[0022] In the aforementioned pusher-type charcoal tunnel furnace, the first exhaust module includes a first main pipe and multiple first exhaust pipes. The multiple first exhaust pipes are arranged at intervals along a first direction. The first exhaust pipes are located below the first gas collection groove. One end of the first exhaust pipe is connected to the first gas collection groove, and the other end of the first exhaust pipe is connected to the first main pipe through a first connecting pipe. A first high-temperature induced draft fan is provided on the first main pipe.

[0023] In the aforementioned pusher-type charcoal tunnel furnace, the second exhaust module includes a second main pipe and multiple second exhaust pipes. The multiple second exhaust pipes are arranged at intervals along the first direction. The second exhaust pipes are located below the second gas collection trough. One end of the second exhaust pipe is connected to the second gas collection trough, and the other end of the second exhaust pipe is connected to the second main pipe through a second connecting pipe. A second high-temperature induced draft fan is provided on the second main pipe.

[0024] The aforementioned pusher-type charcoal tunnel furnace also includes a third main pipe and multiple air inlet pipes. The air inlet pipes are arranged at intervals along a first direction. One end of each air inlet pipe is connected to the third main pipe, and the other end is connected to the calcination section of the furnace cavity. The outlet of the second high-temperature induced draft fan is connected to the third main pipe.

[0025] The aforementioned pusher-type charcoal tunnel furnace also includes a third gas outlet pipe. One end of the third gas outlet pipe is connected to the drying section of the furnace cavity, and the other end of the third gas outlet pipe is equipped with a third high-temperature induced draft fan.

[0026] The aforementioned pusher-type charcoal tunnel furnace also includes a fourth gas outlet pipe. One end of the fourth gas outlet pipe is connected to the cooling section of the furnace cavity, and the other end of the fourth gas outlet pipe is equipped with a fourth high-temperature induced draft fan.

[0027] One of the above-described technical solutions of the present invention has at least one of the following advantages or beneficial effects:

[0028] In this invention, a sliding platform is provided in the furnace cavity. When in use, the pusher plate is placed on the material placement platform. Under the action of the pusher module, the pusher plate will be pushed onto the sliding platform. As more pusher plates are added, they will be arranged sequentially on the sliding platform along the first direction. Each time a pusher plate is added, the foremost pusher plate will move forward along the first direction. Therefore, the pusher plate can gradually pass through the furnace cavity. The pusher plate is provided with a carbon rod frame for accommodating biomass raw materials. Therefore, the biomass raw materials can be carbonized in the furnace cavity.

[0029] When the pusher plate is in the drying section, the biomass raw material in the sealed chamber will generate water vapor when heated. The water vapor is discharged into the first gas collection trough through the first through hole. Since the pusher plate covers the first gas collection trough, the water vapor will not diffuse into the furnace cavity. The first exhaust module will promptly remove the water vapor from the first gas collection trough. In addition, with the isolation of the carbon rod frame, the biomass raw material will not absorb water vapor again after reaching the dry distillation section, which can ensure the quality of charcoal production. Attached Figure Description

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0031] Figure 1 This is a front view of the first embodiment of the present invention;

[0032] Figure 2 This is a top view of the first embodiment of the present invention;

[0033] Figure 3 This is the first embodiment of the present invention. Figure 1 AA section view;

[0034] Figure 4 This is the first embodiment of the present invention. Figure 1 BB section view;

[0035] Figure 5 This is the first embodiment of the present invention. Figure 1 CC section view;

[0036] Figure 6 This is the first embodiment of the present invention. Figure 5 A magnified view of part of F;

[0037] Figure 7 This is the first embodiment of the present invention. Figure 1 DD sectional view;

[0038] Figure 8 This is the first embodiment of the present invention. Figure 1 EE sectional view.

[0039] The figure labels for each figure are as follows:

[0040] 1. Furnace body; 11. Furnace cavity; 12. Drying section; 13. Dry distillation section; 14. Calcination section; 15. Cooling section; 16. Third exhaust pipe; 17. Third high-temperature induced draft fan; 18. Fourth exhaust pipe; 19. Fourth high-temperature induced draft fan;

[0041] 2. Sliding platform; 21. First gas collection channel; 22. Second gas collection channel; 23. Guide channel;

[0042] 3. Push plate; 31. First through hole;

[0043] 4. Carbon rod frame; 41. Base plate; 42. Sleeve; 43. Cover; 44. Positioning protrusion;

[0044] 5. Material feeding module;

[0045] 6. Material table;

[0046] 7. First exhaust module; 71. First main pipe; 72. First exhaust pipe; 73. First connecting pipe; 74. First high-temperature induced draft fan;

[0047] 8. Second exhaust module; 81. Second main pipe; 82. Second exhaust pipe; 83. Second connecting pipe; 84. Second high-temperature induced draft fan;

[0048] 9. Third main pipe; 91. Air intake pipe. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0050] The following disclosure provides many different implementations or examples for different ways of implementing the present invention.

[0051] Reference Figures 1 to 8 As shown, in one embodiment of the present invention, a pusher plate type charcoal tunnel furnace includes a furnace body 1 and a furnace cavity 11 located in the furnace body 1. The furnace cavity 11 is divided into a drying section 12, a dry distillation section 13, a calcination section 14 and a cooling section 15 along its conveying direction. Gas is introduced into the calcination section 14 for combustion. The high-temperature flue gas generated by combustion flows back to the dry distillation section 13 and the drying section 12 to increase the temperature of the dry distillation section 13 and the drying section 12.

[0052] The furnace cavity 11 is equipped with a sliding platform 2, which extends from the input end of the furnace cavity 11 to the output end of the furnace cavity 11, and the extension direction of the sliding platform 2 is the first direction; it also includes multiple push plates 3, each push plate 3 is equipped with a carbon rod frame 4, and the carbon rod frame 4 is equipped with a sealed chamber for containing biomass raw materials; it also includes a feeding module 5 located at the input end of the furnace body 1, and a feeding platform 6 is provided between the feeding module 5 and the furnace body 1, which is connected to the sliding platform 2; the push plates 3 are placed on the feeding platform 6, and the feeding module 5 pushes the push plates 3 on the feeding platform 6 onto the sliding platform 2;

[0053] In use, the pusher plate 3 is placed on the material feeding platform 6. Under the action of the pusher module 5, the pusher plate 3 will be pushed onto the sliding platform 2. As more pusher plates 3 are added, they will be arranged sequentially on the sliding platform 2 along the first direction. Each time a pusher plate 3 is added, the foremost pusher plate 3 will move forward along the first direction. Therefore, the pusher plate 3 can gradually pass through the furnace cavity 11. The pusher plate 3 is equipped with a carbon rod frame 4 to accommodate biomass raw materials. Therefore, the biomass raw materials can be carbonized in the furnace cavity 11.

[0054] Compared to the traditional kiln car structure, the pusher plate structure of this application avoids the jamming problem caused by the high temperature deformation of the kiln car when passing through the tunnel furnace. It is more durable, has a lower failure rate, and only the pusher plate 3 needs to be replaced when a problem occurs, without the need to stop the furnace and stop production.

[0055] In this embodiment, the sliding platform 2 is provided with a first air collection groove 21, which is located in the drying section 12 and extends along the first direction; when the push plate 3 is located in the drying section 12, the push plate 3 will cover the first air collection groove 21, and the push plate 3 is provided with a first through hole 31 that connects the sealed chamber and the first air collection groove 21.

[0056] It also includes a first air extraction module 7, which is connected to the first air collection channel 21;

[0057] When the pusher plate 3 is in the drying section 12, the biomass raw material in the sealed chamber will generate water vapor when heated. The water vapor is discharged into the first gas collection groove 21 through the first through hole 31. Since the pusher plate 3 covers the first gas collection groove 21, the water vapor will not diffuse into the furnace chamber 11. The first exhaust module 7 will promptly extract the water vapor from the first gas collection groove 21. With the isolation of the carbon rod frame 4, the biomass raw material will not absorb water vapor again after reaching the dry distillation section 13, which can ensure the quality of charcoal production.

[0058] Specifically, the first exhaust module 7 includes a first main pipe 71 and a plurality of first exhaust pipes 72. The plurality of first exhaust pipes 72 are arranged at intervals along a first direction. The first exhaust pipes 72 are located below the first gas collection groove 21. One end of the first exhaust pipe 72 is connected to the first gas collection groove 21, and the other end of the first exhaust pipe 72 is connected to the first main pipe 71 through a first connecting pipe 73. A first high-temperature induced draft fan 74 is provided on the first main pipe 71.

[0059] The first high-temperature induced draft fan 74 is generally connected to the external chimney. The first high-temperature induced draft fan 74 generates negative pressure in the first main pipe 71, thereby allowing the first exhaust pipe 72 to draw water vapor from the first gas collection trough 21 and discharge the water vapor in time.

[0060] In this embodiment, the sliding platform 2 is provided with a second gas collection groove 22, which is located in the dry distillation section 13 and extends along the first direction; the first gas collection groove 21 is connected to the second gas collection groove 22, and a partition is provided at the connection between the first gas collection groove 21 and the second gas collection groove 22 so that the first through hole 31 can be aligned with the second gas collection groove 22, while the partition can isolate the first gas collection groove 21 and the second gas collection groove 22.

[0061] When the pusher plate 3 is located in the dry distillation section 13, the pusher plate 3 will cover the second gas collection groove 22, and the first through hole 31 connects the sealed chamber and the second gas collection groove 22; it also includes a second gas extraction module 8, which is connected to the second gas collection groove 22.

[0062] When the pusher plate 3 is located in the dry distillation section 13, the biomass raw material in the sealed chamber generates gas. The gas is discharged into the second gas collection groove 22 through the first through hole 31. Since the pusher plate 3 covers the second gas collection groove 22, the gas will not diffuse into the furnace chamber 11. The second gas extraction module 8 will promptly extract the gas in the second gas collection groove 22.

[0063] In this way, water vapor, gas, and high-temperature flue gas can be transported separately, reducing the risk of deflagration.

[0064] Specifically, the second exhaust module 8 includes a second main pipe 81 and a plurality of second exhaust pipes 82. The plurality of second exhaust pipes 82 are arranged at intervals along the first direction. The second exhaust pipes 82 are located below the second air collection groove 22. One end of the second exhaust pipe 82 is connected to the second air collection groove 22, and the other end of the second exhaust pipe 82 is connected to the second main pipe 81 through a second connecting pipe 83. A second high-temperature induced draft fan 84 is provided on the second main pipe 81.

[0065] The second high-temperature induced draft fan 84 creates negative pressure in the second main pipe 81, thereby allowing the second exhaust pipe 82 to draw in the gas from the second gas collection tank 22. The extracted gas can be recycled to other equipment or directly transported back to the calcination section 14 for reuse.

[0066] In this embodiment, it also includes a third main pipe 9 and a plurality of air inlet pipes 91. The air inlet pipes 91 are arranged at intervals along the first direction. One end of the air inlet pipe 91 is connected to the third main pipe 9, and the other end of the air inlet pipe 91 is connected to the calcination section 14 of the furnace chamber 11. The air outlet of the second high-temperature induced draft fan 84 is connected to the third main pipe 9.

[0067] The third main pipeline 9 is connected to an external gas supply device to obtain gas, and the gas is transported to the calcination section 14 through the intake pipe 91; the second high-temperature induced draft fan 84 can send the gas generated in the dry distillation section 13 to the third main pipeline 9 to provide gas for the calcination section 14.

[0068] In this embodiment, a third exhaust pipe 16 is also included. One end of the third exhaust pipe 16 is connected to the drying section 12 of the furnace cavity 11, and the other end of the third exhaust pipe 16 is provided with a third high-temperature induced draft fan 17.

[0069] The third high-temperature induced draft fan 17 can generate negative pressure in the drying section 12, allowing the high-temperature flue gas generated in the calcination section 14 to flow through. This allows the high-temperature flue gas to pass through the dry distillation section 13 and the drying section 12 in sequence. Excess flue gas is discharged through the third exhaust pipe 16. The third high-temperature induced draft fan 17 is connected to the external chimney to discharge the flue gas into the external chimney. The external chimney then purifies the flue gas through external purification equipment.

[0070] In this embodiment, a fourth exhaust pipe 18 is also included. One end of the fourth exhaust pipe 18 is connected to the cooling section 15 of the furnace cavity 11, and the other end of the fourth exhaust pipe 18 is provided with a fourth high-temperature induced draft fan 19.

[0071] The fourth high-temperature induced draft fan 19 generates negative pressure through the fourth exhaust pipe 18, drawing away the hot air from the cooling section 15. The cold air enters the cooling section 15 from the output end of the furnace cavity 11, thereby lowering the temperature of the cooling section 15 and cooling the carbonized charcoal.

[0072] In this embodiment, the direction that is perpendicular to and horizontal to the first direction is the second direction; the push plates 3 are arranged into a push plate group and placed on the material placement table 6, and the push plate group includes at least two push plates 3 arranged at intervals along the second direction;

[0073] Each time a pusher plate 3 is placed on the material placement platform 6, it is a pusher plate group. When the material pushing module 5 pushes the material, it pushes a pusher plate group onto the sliding platform 2. Therefore, at least two rows of pusher plates 3 will be arranged on the sliding platform 2, which can effectively utilize the space of the furnace cavity 11.

[0074] In this embodiment, the material pushing module 5 includes a hydraulic push rod, which pushes the push plate 3 on the material placement platform 6 to move. When the hydraulic push rod extends, it pushes the push plate 3 away. When the hydraulic push rod retracts, it places the push plate 3 onto the material placement platform 6.

[0075] In this embodiment, the sliding platform 2 is provided with a guide groove 23 adapted to the push plate 3. The guide groove 23 extends along the first direction, and the push plate 3 is arranged in the guide groove 23 along the first direction.

[0076] The guide groove 23 can accurately position the moving direction and path of the push plate 3. The size of the guide groove 23 is generally adapted to the size of the push plate 3, so that the push plate 3 can only move along the guide groove 23 and will not rotate in the guide groove 23.

[0077] In this embodiment, the bottom of the guide groove 23 is an inclined surface, which slopes downward from the input end of the furnace cavity 11 to the output end of the furnace cavity 11.

[0078] The inclined surface is designed to facilitate the movement of the push plate 3, giving the push plate 3 a downward tendency, so that the push module 5 can easily push the push plate 3 to move.

[0079] Furthermore, in order to control the time it takes for the pusher plate 3 to pass through the tunnel carbonization furnace, it is necessary to avoid the pusher plate 3 from sliding down freely as much as possible. In this way, controlling the pushing speed of the pusher plate 3 can control the time it takes for the pusher plate 3 to pass through.

[0080] Generally, the angle between the inclined surface and the horizontal plane is 1 to 3°. At this angle, the push plate 3 is not easy to slide down freely. Preferably, the angle between the inclined surface and the horizontal plane is 1°.

[0081] In this embodiment, the carbon rod frame 4 includes a base plate 41, a sleeve 42, and a cover 43. The base plate 41 and the sleeve 42 together form an upward-opening receiving chamber. Biomass raw materials are placed into the receiving chamber from top to bottom. The top of the sleeve 42 is provided with a cover 43 to cover the receiving chamber, thereby making the receiving chamber a sealed chamber in which the biomass raw materials can be sealed.

[0082] The base plate 41 has a positioning protrusion 44 on the side facing away from the sleeve 42. The positioning protrusion 44 is inserted into the first through hole 31. The carbon rod frame 4 can be fixed on the push plate 3 by the positioning protrusion 44. The positioning protrusion 44 has a second through hole that connects the sealed chamber and the first through hole 31.

[0083] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A pusher-plate type charcoal tunnel furnace, comprising a furnace body and a furnace cavity located within the furnace body, wherein the furnace cavity is sequentially divided into a drying section, a dry distillation section, a calcination section, and a cooling section along its conveying direction, characterized in that, The furnace cavity is equipped with a sliding platform that extends from the input end of the furnace cavity to the output end of the furnace cavity, and the extension direction of the sliding platform is a first direction. The sliding platform is provided with a first gas collecting groove, which is located in the drying section and extends along a first direction. It also includes multiple push plates, each push plate having a carbon rod frame, and the carbon rod frame having a sealed chamber for containing biomass raw materials; It also includes a material pushing module located at the input end of the furnace body, and a material placing platform is provided between the material pushing module and the furnace body. The material placing platform is connected to the sliding platform. The pusher plate is placed on the material placing platform, and the material pushing module pushes the pusher plate on the material placing platform onto the sliding platform so that the pusher plate is arranged along the first direction on the sliding platform and gradually moves forward. When the pusher plate is in the drying section, the pusher plate will cover the first gas collection groove. The pusher plate is provided with a first through hole that connects the sealed chamber and the first gas collection groove. It also includes a first air extraction module, which is connected to a first air collection channel.

2. The pusher-plate type charcoal-making tunnel furnace according to claim 1, characterized in that, The sliding platform is provided with a second gas collection groove, which is located in the dry distillation section and extends along the first direction. The first gas collecting channel is connected to the second gas collecting channel, and a partition is provided at the connection between the first gas collecting channel and the second gas collecting channel; When the pusher plate is in the dry distillation section, the pusher plate will cover the second gas collection groove, and the first through hole connects the sealed chamber and the second gas collection groove. It also includes a second air extraction module, which is connected to the second air collection channel.

3. The pusher-plate type charcoal-making tunnel furnace according to claim 1, characterized in that, The direction that is perpendicular to and horizontal to the first direction is the second direction; The push plates are arranged into a push plate group and placed on the material placement platform. The push plate group includes at least two push plates arranged at intervals along a second direction.

4. The pusher-plate type charcoal-making tunnel furnace according to claim 1 or 3, characterized in that, The sliding platform is provided with a guide groove adapted to the push plate, the push plate extends along a first direction, and the push plates are arranged in the guide groove along the first direction; The bottom of the guide groove is an inclined surface, which slopes downward from the input end of the furnace cavity to the output end of the furnace cavity.

5. The pusher-plate type charcoal-making tunnel furnace according to claim 1, characterized in that, The carbon rod frame includes a base plate, a sleeve, and a cover. The base plate and the sleeve together form an upward-opening receiving chamber. The top of the sleeve is provided with a cover to cover the receiving chamber, thereby forming a sealed chamber. The bottom plate has a positioning protrusion on the side facing away from the sleeve. The positioning protrusion is inserted into the first through hole, and the positioning protrusion has a second through hole that connects the sealed chamber and the first through hole.

6. The pusher-plate type charcoal-making tunnel furnace according to claim 1, characterized in that, The first exhaust module includes a first main pipe and a plurality of first exhaust pipes. The plurality of first exhaust pipes are arranged at intervals along a first direction. The first exhaust pipes are located below the first gas collection groove. One end of the first exhaust pipe is connected to the first gas collection groove, and the other end of the first exhaust pipe is connected to the first main pipe through a first connecting pipe. A first high-temperature induced draft fan is provided on the first main pipe.

7. The pusher-plate type charcoal-making tunnel furnace according to claim 2, characterized in that, The second exhaust module includes a second main pipe and a plurality of second exhaust pipes. The plurality of second exhaust pipes are arranged at intervals along a first direction. The second exhaust pipes are located below the second gas collection groove. One end of the second exhaust pipe is connected to the second gas collection groove, and the other end of the second exhaust pipe is connected to the second main pipe through a second connecting pipe. A second high-temperature induced draft fan is provided on the second main pipe.

8. The pusher-plate type charcoal-making tunnel furnace according to claim 7, characterized in that, It also includes a third main pipe and multiple air inlet pipes, the air inlet pipes being arranged at intervals along the first direction, one end of the air inlet pipe being connected to the third main pipe, the other end of the air inlet pipe being connected to the calcination section of the furnace cavity, and the air outlet of the second high-temperature induced draft fan being connected to the third main pipe.

9. The pusher-plate type charcoal-making tunnel furnace according to claim 1, characterized in that, It also includes a third exhaust pipe, one end of which is connected to the drying section of the furnace cavity, and the other end of which is equipped with a third high-temperature induced draft fan.

10. The pusher-plate type charcoal-making tunnel furnace according to claim 1, characterized in that, It also includes a fourth exhaust pipe, one end of which is connected to the cooling section of the furnace cavity, and the other end of which is equipped with a fourth high-temperature induced draft fan.

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