Agricultural and forestry waste carbonization pyrolysis device

Abstract

The embodiment of the present application provides a carbonization and pyrolysis device for agricultural and forestry waste, which relates to the technical field of pyrolysis furnaces. The carbonization and pyrolysis device for agricultural and forestry waste includes a pyrolysis furnace and a conveying cylinder connected to an opening at one end of the pyrolysis furnace. A feed cylinder connected to the conveying cylinder is fixed above the conveying cylinder, and a screw rod is coaxially arranged inside the feed cylinder. At the same time, a support frame is transversely fixed at the discharge opening at the end of the feed cylinder, and an internal hollow support seat is connected at the center of the support frame. Rotatable screw conveying shafts are respectively arranged on both sides of the bottom surface of the support seat, and the two screw conveying shafts are driven by the ends of the screw rods. Through the linkage design of the screw rods and the double screw conveying shafts, continuous conveying and anti-blocking of long-fiber materials are achieved, which has the advantages of effectively solving the problem of bridging blockage during the conveying of long-fiber materials and improving the continuity of material conveying.

Description

Technical Field

[0001] The invention belongs to the technical field of pyrolysis furnaces, and in particular relates to a carbonization pyrolysis device for agricultural and forestry wastes. Background Art

[0002] With the development of biomass resource utilization technologies, pyrolysis and carbonization of agricultural and forestry wastes has become a key approach to achieving high-value waste conversion and carbon sequestration and emission reduction. Pyrolysis devices convert agricultural and forestry wastes such as straw, rice husks, sawdust, and bagasse into biochar, combustible gas, and tar in a high-temperature, oxygen-deficient environment. These devices have broad application prospects in soil improvement, energy recovery, and carbon sequestration. Therefore, whenever waste needs to be treated, they can be processed through pyrolysis devices.

[0003] In the existing technology (publication number CN112094660A, entitled "A Fully Automatic Loading and Discharging Ultra-Long Biomass Pyrolysis Furnace"), the furnace body at the feed end and the discharge end requires a set of fixed and movable support wheels, respectively. This pyrolysis furnace can automatically load materials before heating and automatically discharge materials after pyrolysis is complete. During the implementation of this technical solution, at least the following problems were discovered in the existing technology.

[0004] However, the pyrolysis equipment described in the aforementioned patent faces significant material clogging issues in actual operation, particularly for agricultural and forestry waste with high fiber content and elongated shapes. This type of material suffers from the following technical drawbacks when entering the feed hopper: Long-fiber materials tend to entangle with each other during gravity feeding, forming an arched bridge structure at the hopper opening, disrupting material flow and hindering the operation of the pyrolysis device. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems of material blockage in the prior art. To this end, the present application proposes a carbonization and pyrolysis device for agricultural and forestry waste.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the present invention is as follows: an agricultural and forestry waste carbonization and pyrolysis device, comprising a pyrolysis furnace, and a conveying cylinder connected to an opening at one end of the pyrolysis furnace, a feed cylinder connected to the conveying cylinder is fixed above the conveying cylinder, a screw rod is coaxially arranged inside the feed cylinder, and a support frame is horizontally fixed at the discharge opening at the end of the feed cylinder, and an internal hollow support seat is connected to the center of the support frame, and rotatable spiral conveying shafts are respectively arranged on both sides of the bottom surface of the support seat, and the two spiral conveying shafts are driven by the ends of the spiral rod.

[0007] Preferably, a bracket extends from the opening on one side of the outer surface of the conveying cylinder, and a motor capable of driving the screw rod is connected above the bracket. The end of the screw rod extends to the inside of the support seat, and a sprocket 2 is fixed to the bottom surface of the screw rod.

[0008] Preferably, a sprocket 1 is fixed to the top of the spiral conveying shaft, and the diameter of the sprocket 2 is larger than that of the sprocket 1, and the sprocket 2 is located between the two sprockets 1, and a chain 1 is sleeved between the sprocket 2 and the sprocket 1.

[0009] Preferably, the bracket has a drive box fixed above it, and the bottom surface of the motor is fixed above the drive box. A crown gear 1 is fixed at the output end of the motor, and a rotating shaft 1 extends downward from the inner cavity of the drive box. The upper end of the spiral rod is fixedly connected to the outer peripheral surface of the rotating shaft 1, and a crown gear 2 is also fixed on the top of the rotating shaft 1.

[0010] Preferably, a gear is meshedly connected between the crown gear 1 and the crown gear 2, and a rotating rod fixed on one side of the outer surface of the gear is connected to the surface of the drive box.

[0011] Preferably, a second rotating shaft extends downward from the bottom surface of the crown gear one, and a rotating hole is passed downward from the top surface of the crown gear two, and the second rotating shaft passes through the rotating hole, and a knife plate holder is fixed at the end of the first rotating shaft.

[0012] Preferably, a rotatable shaft three is provided on both sides of the interlayer opening of the blade holder, a rotating knife capable of cutting is fixed on the outer peripheral surface of the shaft three, and a sharp cutting edge is formed between the side of the outer surface of the blade holder and the contact surface of the rotating knife.

[0013] Preferably, a sprocket four is fixed to the lower part of the outer circumference of the rotating shaft three, a sprocket three is fixed to the bottom surface of the rotating shaft two, and a chain two is sleeved on the outer circumferences of the sprocket three and the sprocket four.

[0014] Preferably, an air pipe is connected to the lower portion of the outer circumference of the feed barrel, and a lifting rod capable of exhausting air is provided above the support seat, and the bottom opening of the lifting rod is communicated with the air pipe.

[0015] Preferably, a spiral conveyor is coaxially arranged inside the conveying cylinder, a heat insulation cover is sleeved on the outer circumference of the pyrolysis furnace, a pyrolysis furnace frame is fixed on the bottom surface of the pyrolysis furnace, and a conveying device is provided at the discharge port below the pyrolysis furnace.

[0016] The agricultural and forestry waste carbonization and pyrolysis device of the present invention realizes continuous transportation and anti-blocking of long-fiber materials through the linkage design of the screw rod and the double-screw conveying shaft, and has the advantages of effectively solving the bridging blockage problem during the transportation of long-fiber materials and improving the continuity of material transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the explosion structure of the pyrolysis furnace of the present invention;

[0020] Figure 3 This is a schematic diagram of the top view of the pyrolysis furnace of the present invention;

[0021] Figure 4 For the present invention Figure 3 Schematic diagram of the AA section structure;

[0022] Figure 5 This is a schematic diagram of the explosion structure of the feed barrel of the present invention;

[0023] Figure 6 This is a schematic diagram of the spiral rod explosion structure of the present invention;

[0024] Figure 7 This is a schematic diagram of the top view of the spiral rod structure of the present invention;

[0025] Figure 8 For the present invention Figure 7 Schematic diagram of the BB cross-section structure;

[0026] Figure 9 Schematic diagram of the trachea structure of the present invention;

[0027] Figure 10 This is a schematic diagram of the top view of the feed barrel of the present invention;

[0028] Figure 11 For the present invention Figure 10 Schematic diagram of the CC cross-section structure;

[0029] Figure 12 For the present invention Figure 11 A in the middle is an enlarged structural diagram;

[0030] Figure 13 This is a schematic diagram of the lifting rod structure of the present invention;

[0031] Figure 14 For the present invention Figure 13 Enlarged structural diagram at point B in the middle.

[0032] Explanation of the markings in the figure: 1. Base; 11. Pyrolysis furnace frame; 12. Heat shield; 13. Pyrolysis furnace; 14. Conveying device; 2. Conveying cylinder; 21. Feeding cylinder; 211. Bracket; 212. Drive box; 22. Screw conveyor; 3. Motor; 31. Crown gear 1; 311. Rotating shaft 1; 312. Screw rod; 313. Crown gear 2; 314. Blade frame; 315. Rotating hole; 316. Sprocket 2; 317. Reciprocating groove; 318. Lifting hole; 33. Rotating shaft two; 331, sprocket three; 34, sprocket four; 341, rotating shaft three; 342, rotating knife; 343, chain two; 35, gear; 4, support frame; 41, support seat; 42, screw conveyor shaft; 421, sprocket one; 422, chain one; 43, docking tube; 431, limit rod; 44, air inlet; 5, air pipe; 6, lifting rod; 61, insert; 62, top cover; 621, spring tube; 622, spring; 63, lifting cover; 64, limit hole. DETAILED DESCRIPTION

[0033] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1-Figure 2 As shown, the carbonization and pyrolysis device for agricultural and forestry waste of the present invention includes a pyrolysis furnace 13 and a conveying cylinder 2 connected to an opening at one end of the pyrolysis furnace 13. A spiral conveying member 22 is coaxially arranged inside the conveying cylinder 2, and a heat insulation cover 12 is sleeved on the outer peripheral surface of the pyrolysis furnace 13. A pyrolysis furnace frame 11 is fixed to the bottom surface of the pyrolysis furnace 13, and a base 1 is also fixed below the pyrolysis furnace frame 11. A conveying device 14 is provided at the discharge port below the pyrolysis furnace 13, wherein the spiral conveying member 22 refers to a spiral structure coaxially mounted with the conveying cylinder 2, which can be specifically implemented by a metal shaft with variable diameter spiral blades. It generates axial thrust through rotation, forcing the material to move along the conveying direction. The heat insulation cover 12 refers to a multi-layer composite structure wrapped around the outside of the pyrolysis furnace 13, which can specifically be a combination of ceramic fiber and metal shell. It reduces heat loss from the pyrolysis furnace 13 by blocking thermal radiation and convection. Meanwhile, the conveying device 14 refers to a mechanical transmission device arranged at the discharge port, and specifically can be a screw conveyor or a belt conveyor, which transfers the carbonized product from the enclosed space to an external collection container through continuous operation.

[0035] Specifically, the spiral conveyor 22 rotates at a constant speed in the conveying cylinder 2, continuously pushing the material from the feed end to the entrance of the pyrolysis furnace 13. The heat insulation cover 12 covers the outer surface of the pyrolysis furnace 13, so that the temperature in the pyrolysis furnace 13 is maintained within the set range to ensure that the pyrolysis reaction is fully carried out. The pyrolysis furnace frame 11 is fixed to the ground through the bottom support point to maintain the verticality of the pyrolysis furnace 13 in a high temperature environment to prevent material leakage due to thermal deformation. The conveying device 14 is connected to the discharge port flange and operates at a preset speed under the control of the drive unit to transfer the carbonized products from the pyrolysis furnace 13 to the external storage area.

[0036] like Figure 1-Figure 5 As shown, a feed barrel 21 connected to the conveying barrel 2 is fixed above the conveying barrel 2, wherein the feed barrel 21 refers to a tubular structure vertically mounted above the conveying barrel 2, which can be implemented by a conical metal cylinder, and is used to receive and temporarily store materials to be processed. A bracket 211 extends from one side of the outer surface of the conveying barrel 2 to the opening, and a motor 3 capable of driving a screw rod 312 is also connected above the bracket 211, and the screw rod 312 is placed inside the feed barrel 21. Among them, the bracket 211 refers to a support structure extending from the outer surface of the conveying barrel 2 toward the opening, which can be implemented by welding or bolting, and is used to provide a rigid fixed foundation for the motor 3 to prevent the vibration of the equipment from causing the power transmission components to shift. The motor 3 refers to a power device that drives the screw rod 312 to rotate, which can be implemented by a reduction motor or a variable frequency motor, and is connected to the screw rod 312 through an output shaft to ensure that the screw rod 312 rotates continuously in the feed barrel 21.

[0037] A support frame 4 is fixed horizontally at the discharge opening at the end of the feed barrel 21, and an internal hollow support seat 41 is connected to the center of the support frame 4. Rotatable spiral conveying shafts 42 are respectively provided on both sides of the bottom surface of the support seat 41, and the two spiral conveying shafts 42 are driven by the ends of the screw rod 312. The screw rod 312 refers to a rotating propulsion component arranged along the axis of the feed barrel 21, which can be specifically implemented by a spiral metal shaft, and pushes the material downward through rotation. The support frame 4 refers to a bearing structure fixed horizontally at the discharge opening, which is used to disperse the impact force of the falling material. The support seat 41 refers to a hollow component connected to the center of the support frame 4, which can be specifically implemented by a shell with an internal bearing seat to provide installation space for the spiral conveying shaft 42. The spiral conveying shaft 42 refers to a rotating conveying component symmetrically arranged at the bottom of the support seat 41, which can be specifically implemented by a double helical blade structure, and the material is squeezed and conveyed downward by rotation.

[0038] Specifically, after the material enters the feed barrel 21, the screw rod 312 continuously pushes the material downward to the discharge opening through rotation. The end of the screw rod 312 drives the two screw conveyor shafts 42 to rotate synchronously through a sprocket mechanism, so that the material is forcibly conveyed before entering the pyrolysis furnace 13 to prevent the formation of bridges. Compared with the existing technology, which relies on gravity discharge and does not provide a material dispersion structure, the fiber material is prone to arched blockage at the warehouse opening. This solution replaces passive discharge with active push by the screw rod 312, combined with the dual screw conveyor shafts 42 for forced discharge.

[0039] like Figure 5-Figure 6 As shown, the present application further proposes that a sprocket 2 316 is fixed to the bottom surface of the screw rod 312, and a sprocket 1 421 is fixed to the top of the screw conveying shaft 42, wherein the sprocket 1 421 refers to a transmission component fixed to the top of the screw conveying shaft 42, and can be specifically realized by a toothed metal disc connected by welding or bolts, and is used to receive the power of the sprocket 2 316 and drive the screw conveying shaft 42 to rotate. At the same time, the diameter of the sprocket 2 316 is larger than that of the sprocket 1 421, and the sprocket 2 316 is located between the two sprockets 1 421, and a chain 1 422 is sleeved between the sprocket 2 316 and the sprocket 1 421, which is used to synchronously transmit the rotational power of the sprocket 2 316 to the two sprockets 1 421. Since the sprocket 2 316 is set to have a diameter larger than that of the sprocket 1 421, the rotation speed of the sprocket 1 421 is higher. Two sprockets 1 421 are symmetrically located on either side of sprocket 2 316. They rotate synchronously via a closed-loop transmission path of chain 1 422, eliminating speed deviations between the screw conveyor shafts 42. Driven by sprocket 1 421, the screw conveyor shafts 42 forcefully push material at the same speed and torque. Long-fiber materials are transported downward by the synergistic action of the twin helices, preventing the formation of an arched bridge structure due to entanglement.

[0040] like Figure 5-Figure 8 As shown, the present application further proposes that a drive box 212 is fixed above the bracket 211, and the bottom surface of the motor 3 is fixed above the drive box 212. The drive box 212 refers to a rigid shell structure used to support the motor 3 and transmit power. Specifically, it can be fixed to the bracket 211 by welding or bolting. The transmission components are accommodated within the internal space of the box to achieve a closed and protected power transmission path. A crown gear 1 31 is fixed at the output end of the motor 3. A rotating shaft 1 311 extends downward from the inner cavity of the drive box 212. The upper end of the screw rod 312 is fixedly connected to the outer circumference of the rotating shaft 1 311. A crown gear 2 313 is also fixed to the top of the rotating shaft 1 311.

[0041] A gear 35 is meshedly connected between the crown gear 1 31 and the crown gear 2 313. A rotating rod fixed on one side of the outer surface of the gear 35 is connected to the surface of the drive box 212, wherein the crown gear 2 313 refers to a driven gear that forms an orthogonal meshing relationship with the crown gear 1 31. When the motor 3 drives the crown gear 1 31 to rotate, the power is transmitted to the crown gear 2 313 through the gear 35 meshing therewith, forming a stable orthogonal transmission system. In the process of power transmission, the rotating rod fixed on the outer surface of the gear 35 forms a rigid constraint with the drive box 212, effectively suppressing the axial movement of the gear 35 when running at high speed. The crown gear 2 313 stably transmits power to the screw rod 312 through the rotating shaft 1 311, so that the screw rod 312 maintains a uniform rotation on the support seat 41, thereby driving the two spiral conveying shafts 42 to operate synchronously.

[0042] A second rotating shaft 33 extends downward from the bottom of crown gear 1 31 , and a rotation hole 315 extends downward from the top of crown gear 2 313 . Rotating shaft 2 33 passes through rotation hole 315 . Rotating shaft 2 33 is a vertical transmission shaft rigidly connected to crown gear 1 31 , specifically a cylindrical metal shaft. Its function is to transmit the rotational power of crown gear 1 31 to the cutting mechanism below. Rotating hole 315 is a through-hole opened in the top of crown gear 2 313 , specifically a circular through-hole structure. Its function is to provide space for rotating shaft 2 33 to pass coaxially.

[0043] A blade holder 314 is also fixed to the end of the rotating shaft 311. This blade holder 314 is a structure that supports the cutting tools, and its interlayer is hollow and open. Compared to the prior art, patent publication number CN112094660A utilizes a fixed support wheel assembly for automatic loading, but lacks a material cutting mechanism. This application integrates the cutting function through a nested transmission structure, allowing for simultaneous fiber cutting during material transport, further reducing the length of long fibers.

[0044] A rotatable shaft 341 is provided on either side of the interlayer opening of the blade holder 314. Shaft 341 is a rotating shaft that extends through the top and bottom surfaces of the interlayer of the blade holder 314. Specifically, it can be a solid steel shaft, rotatably connected to the blade holder 314 via bearings. A rotating blade 342 capable of cutting is fixed to the outer circumference of shaft 341. A sharp cutting edge is formed between the side of the outer surface of the blade holder 314 and the contact surface of the rotating blade 342. The sharp cutting edge refers to a linear cutting edge formed by grinding the side of the blade holder 314. Specifically, it can be a beveled structure with a blade angle of 30-45 degrees. A gap of 0.5-2 mm is maintained between this edge and the outer circumference of the rotating blade 342 to form an effective shearing area. A sprocket 4 34 is fixed to the lower portion of the outer circumference of rotating shaft 3 341, and a sprocket 3 331 is fixed to the bottom surface of rotating shaft 2 33. Chain 2 343 is sleeved between the outer circumferences of sprocket 3 331 and sprocket 4 34, and the diameter of sprocket 3 331 is larger than that of sprocket 4 34. Therefore, when long-fiber material falls through feed drum 21, the output shaft of motor 3 drives rotating shaft 2 33, which in turn rotates blade holder 314 via the crown gear. Because crown gear 1 31 and crown gear 2 313 rotate coaxially and counter-rotatingly, sprocket 3 331 at the end of rotating shaft 2 33 drives rotating blade 342 via chain 2 343. The cutting edge of blade holder 314 then moves relative to the outer circumference of rotating blade 342, producing a continuous shearing action. As the fiber material enters feed drum 21, it is cut by the shearing zone formed by rotating blade 342 and the cutting edge. This prevents excessively long fibers from interfering with material discharge.

[0045] like Figure 11-14 As shown, a lifting hole 318 is formed upward through the bottom surface of the spiral rod 312, and a reciprocating groove 317 is formed on the inner wall of the lifting hole 318. A lifting rod 6, which can be raised and lowered, is installed inside the opening of the spiral rod 312. An insert 61 is installed on the outer circumference of the lifting rod 6, and one end of the insert 61 extends into the path of the reciprocating groove 317. The reciprocating groove 317 is composed of two spiral grooves with the same pitch and opposite rotation directions, connected at both ends by a transition curve of a circular arc, parabola, or sine curve, forming a closed motion trajectory. A top cover 62 with a sloping dome is fixed to the top of the lifting rod 6, and a lifting cover 63, which can be raised and lowered, is sleeved on the outer circumference of the lifting rod 6.

[0046] Spring tubes 621 are fixed to the opposing surfaces of the top cover 62 and the lifting cover 63, and a spring 622 secures the two spring tubes 621 together. Therefore, when the screw rod 312 rotates to squeeze the material downward, the screw rod 312 rotates, causing the reciprocating groove 317 to rotate as well, which in turn allows the lifting rod 6 to reciprocate along the lifting hole 318. The continuous lifting and lowering of the top cover 62 allows the material to move upward, preventing blockage in the material discharge process.

[0047] An air pipe 5 is connected to the lower portion of the outer circumference of the feed barrel 21. An air inlet 44 is provided from the feed barrel 21 to the interior of the support frame 4. One end of the air pipe 5 is connected to the air inlet 44. A docking pipe 43 extends from the outer circumference of the support frame 4 to the bottom surface of the support seat 41. This docking pipe 43 is connected to the interior of the lifting rod 6. A limiting rod 431 extends upward from the opening of the docking pipe 43, and limiting holes 64 are provided on both sides of the bottom surface of the lifting rod 6 for the limiting rod 431 to be inserted. The limiting holes 64 and the limiting rod 431 allow the lifting rod 6 to be raised and lowered. Therefore, when the material inside the feed barrel 21 needs to be cleared, one end of the air pipe 5 is connected to an external high-pressure gas source. The high-pressure gas can pass through the air inlet 44 and the lifting rod 6, causing the lifting cover 63 to move downward. The gas can then be discharged, further achieving the clearing effect.

[0048] The working principle of the carbonization and pyrolysis device for agricultural and forestry wastes: After the material enters the feed barrel 21, the screw rod 312 continuously pushes the material downward to the discharge opening through rotation. The end of the screw rod 312 drives the two screw conveying shafts 42 to rotate synchronously through a sprocket mechanism, so that the material is forced to be conveyed before entering the pyrolysis furnace 13 to prevent the formation of bridges. Compared with the existing technology, the existing technology relies on gravity discharge and does not set a material dispersion structure, which makes it easy for the fiber material to form an arched blockage at the warehouse opening. This solution replaces passive discharge with active pushing by the screw rod 312, combined with the double screw conveying shaft 42 for forced discharge;

[0049] As the long-fiber material falls through the feed barrel 21, the output shaft of the motor 3 drives the second shaft 33 to rotate, which in turn rotates the blade holder 314 through the crown gear. Since the crown gear 1 31 and the second crown gear 313 are coaxial and counter-rotating, the sprocket 3 331 at the end of the second shaft 33 drives the rotating blade 342 through the chain 2 343. Then, the cutting edge of the blade holder 314 and the outer peripheral surface of the rotating blade 342 form relative motion, producing a continuous shearing action. When the fiber material enters the feed barrel 21, it is cut off by the shearing area formed by the rotating blade 342 and the cutting edge. This prevents some overly long fibers from affecting the material discharge.

[0050] When the screw rod 312 rotates to squeeze the material downward, the screw rod 312 rotates to make the reciprocating groove 317 rotate together, and then the lifting rod 6 can reciprocate and rise along the lifting hole 318. Then, the top cover 62 continuously rises and falls, so that the material can move upward to prevent the material from being blocked.

[0051] When the material inside the feed barrel 21 needs to be cleared, one end of the air pipe 5 is connected to a high-pressure air source, and the high-pressure gas can pass through the air inlet 44 and the lifting rod 6, so that the lifting cover 63 can move downward, and then the gas can be discharged, further achieving the effect of clearing.

[0052] It should be noted that the specific models and specifications of the conveying device 14 and the motor 3 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be repeated in detail.

[0053] The power supply of the conveying device 14 and the motor 3 and the principle thereof are clear to those skilled in the art and will not be described in detail here.

[0054] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A carbonization and pyrolysis device for agricultural and forestry waste, comprising a pyrolysis furnace (13) and a conveying cylinder (2) connected to an opening at one end of the pyrolysis furnace (13), characterized in that: A feed cylinder (21) connected to the conveying cylinder (2) is fixed above the conveying cylinder (2), and a spiral rod (312) is coaxially arranged inside the feed cylinder (21). At the same time, a support frame (4) is transversely fixed at the end of the feed cylinder (21) at the discharge opening, and an internal hollow support seat (41) is connected at the center of the support frame (4). Rotatable spiral conveying shafts (42) are respectively arranged on both sides of the bottom surface of the support seat (41), and the two spiral conveying shafts (42) are driven by the ends of the spiral rod (312). An air pipe (5) is connected below the outer peripheral surface of the feed cylinder (21), and a lifting rod (6) capable of exhausting is arranged above the support seat (41), and the bottom opening of the lifting rod (6) is communicated with the air pipe (5).

2. The agricultural and forestry waste carbonization and pyrolysis device according to claim 1, characterized in that: A bracket (211) extends from a side opening of the outer surface of the conveying cylinder (2), and a motor (3) capable of driving a screw rod (312) is connected above the bracket (211). The end of the screw rod (312) extends to the interior of the support seat (41), and a sprocket wheel (316) is fixed to the bottom surface of the screw rod (312).

3. The agricultural and forestry waste carbonization and pyrolysis device according to claim 2, characterized in that: A sprocket 1 (421) is fixed to the top of the spiral conveying shaft (42), and the diameter of the sprocket 2 (316) is larger than that of the sprocket 1 (421), and the sprocket 2 (316) is located between the two sprockets 1 (421), and a chain 1 (422) is sleeved between the sprocket 2 (316) and the sprocket 1 (421).

4. The carbonization and pyrolysis device for agricultural and forestry waste according to claim 3, characterized in that: A drive box (212) is fixed above the bracket (211), and the bottom surface of the motor (3) is fixed above the drive box (212). A crown gear 1 (31) is fixed at the output end of the motor (3). A rotating shaft 1 (311) extends downward from the inner cavity of the drive box (212), and the upper end of the spiral rod (312) is fixedly connected to the outer peripheral surface of the rotating shaft 1 (311). A crown gear 2 (313) is also fixed on the top of the rotating shaft 1 (311).

5. The agricultural and forestry waste carbonization and pyrolysis device according to claim 4, characterized in that: A gear (35) is meshedly connected between the crown gear 1 (31) and the crown gear 2 (313), and a rotating rod fixed on one side of the outer surface of the gear (35) is connected to the surface of the drive box (212).

6. The agricultural and forestry waste carbonization and pyrolysis device according to claim 5, characterized in that: A rotating shaft 2 (33) extends downward from the bottom surface of the crown gear 1 (31), and a rotating hole (315) extends downward from the top surface of the crown gear 2 (313), and the rotating shaft 2 (33) passes through the rotating hole (315). At the same time, a knife plate holder (314) is fixed at the end of the rotating shaft 1 (311).

7. The agricultural and forestry waste carbonization and pyrolysis device according to claim 6, characterized in that: A rotatable rotating shaft (341) is provided on both sides of the interlayer opening of the knife plate holder (314), and a rotating knife (342) capable of cutting is fixed on the outer peripheral surface of the rotating shaft (341), and a sharp cutting edge is formed between the side of the outer surface of the knife plate holder (314) and the contact surface of the rotating knife (342).

8. The agricultural and forestry waste carbonization and pyrolysis device according to claim 7, characterized in that: A sprocket four (34) is fixed to the lower portion of the outer circumference of the rotating shaft three (341), and a sprocket three (331) is fixed to the bottom surface of the rotating shaft two (33). At the same time, a chain two (343) is sleeved on the outer circumferences of the sprocket three (331) and the sprocket four (34).

9. The agricultural and forestry waste carbonization and pyrolysis device according to claim 8, characterized in that: A spiral conveying member (22) is coaxially arranged inside the conveying cylinder (2), a heat insulating cover (12) is sleeved on the outer peripheral surface of the pyrolysis furnace (13), a pyrolysis furnace frame (11) is fixed on the bottom surface of the pyrolysis furnace (13), and a conveying device (14) is provided at the discharge port below the pyrolysis furnace (13).

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