Biochar preparation device

Abstract

The invention relates to the technical field of biochar preparation, in particular to a biochar preparation device which comprises a machine body, a movable door is arranged on the side face of the machine body, a bottom frame is fixedly installed on the lower side of the machine body, a heating module is arranged in the machine body, a preparation barrel is fixedly installed in the machine body, and a driving mechanism is arranged in the machine body. An auxiliary mechanism is arranged in the machine body corresponding to the driving mechanism, and a ventilation mechanism is arranged on the side face of the machine body. According to the device, a first gear rotates to drive a second gear to be meshed and is restrained by meshing of a gear ring, so that a first preparation barrel rotates along with revolution of the second gear, and materials rotate and move along with the second gear when being arranged in the second preparation barrel; in this way, the materials can be evenly and conveniently switched between the side face and the center position of the preparation barrel by rotating and moving the positions in the preparation barrel, the heating module heats the preparation barrel to ensure that the materials are evenly heated, and the carbonization effect of the materials in the preparation barrel is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of biochar preparation, and in particular to a biochar preparation device. Background Art

[0002] Biochar is a commonly used soil conditioner and agricultural fertilizer. It is a carbon-rich solid formed by carbonization of biomass under high temperature and oxygen-free conditions. It is often produced using agricultural biomass waste such as straw and fruit shells as raw materials.

[0003] The existing carbonization preparation of biochar is generally carried out through a carbonizer. The carbonizer has a threaded conveying structure inside to ensure that the material is carbonized at a uniform angle. Therefore, the material is prone to aggravated breakage when stirred, which makes it easy for the biochar, tar and fuel gas produced by carbonization to be stirred together, which is not convenient for subsequent separation operations. In addition, the required materials are in different shapes, such as blocks and rods. Stirring will cause breakage and affect subsequent use. The accumulated materials are prone to uneven heating due to the different temperatures inside the heating barrel. Furthermore, different materials require different environments, some require an oxygen-rich environment and some require an oxygen-deficient environment. The existing oxygen filling control equipment cannot meet the carbonization needs of different materials. Summary of the invention

[0004] In order to overcome the problem that the existing carbonizer has a threaded conveying structure inside to ensure that the material is carbonized at a uniform angle, the material is prone to aggravated crushing when it is stirred, so that the biochar, tar and fuel gas produced by carbonization are also easily stirred together, which is not convenient for subsequent separation operations. In addition, the required materials are in different shapes, such as blocks and rods. Stirring will cause crushing and affect subsequent use. The accumulated materials are prone to uneven heating due to the different temperatures inside the heating barrel. Furthermore, different materials require different environments, such as those that require an oxygen-rich environment and those that require an oxygen-deficient environment. The existing oxygen injection control equipment cannot meet the problem of carbonization of different materials. The present invention provides a biochar preparation device.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a machine body, a movable door is arranged on the side of the machine body, a bottom frame is fixedly installed on the lower side of the machine body, a heating module is arranged inside the machine body, a preparation barrel is fixedly installed inside the machine body, a driving mechanism is arranged inside the machine body, an auxiliary mechanism is arranged at a position corresponding to the driving mechanism inside the machine body, and a ventilation mechanism is arranged on the side of the machine body;

[0006] The driving mechanism comprises a first motor, a first gear and a second gear are arranged on the side of the first motor, a first preparation cylinder and a second preparation cylinder are arranged on the side of the second gear, a collection box is arranged on the side of the first preparation cylinder, and a cleaning block is arranged on the side of the second preparation cylinder;

[0007] The auxiliary mechanism comprises a clamping block, a matching frame is arranged on the side of the clamping block, and a rotatable matching plate is arranged inside the matching frame;

[0008] The ventilation mechanism comprises a ventilation cavity, a fan module is arranged on the side of the ventilation cavity, a rotatable air guide block is arranged on the side of the fan module, and a first air guide groove and a second air guide groove that can guide flow are arranged on the side of the air guide block.

[0009] Furthermore, the driving mechanism includes a first motor fixedly mounted on the side of the body, a first gear is arranged inside the body, a gear ring is fixedly mounted on the inner side of the body, and a second gear is arranged in a circular array between the first gear and the gear ring.

[0010] Furthermore, the driving mechanism also includes a first constraint groove opened inside the body, the first constraint blocks are movably installed in an equidistant array inside the first constraint groove, and a fixing rod is fixedly installed on the side of the first motor of the first gear raw material.

[0011] Furthermore, the driving mechanism also includes a first preparation cylinder arranged in a circular array on the side of the second gear, a collection box is snap-mounted on the lower side of the first preparation cylinder, a second preparation cylinder is movably installed inside the first preparation cylinder, a blocking block is threadedly installed on the side of the second preparation cylinder, and a cleaning block is fixedly installed on the side of the second preparation cylinder.

[0012] Furthermore, the auxiliary mechanism includes a card block movably sleeved on the side of the fixed rod, a matching frame is arranged in a circular array on the side of the card block and a rectangular block is used to fix the matching frame and the card block, and a matching plate is movably installed inside the matching frame, and matching holes are opened in a circular array on the side of the matching plate.

[0013] Furthermore, the auxiliary mechanism also includes a restraining plate fixedly mounted on the side of the matching frame, a second restraining groove is opened on the inner side of the preparation barrel, and connecting grooves are opened in a circular array on the inner wall of the second restraining groove.

[0014] Furthermore, the ventilation mechanism includes a ventilation cavity formed in a circular array on the side of the preparation barrel, the inner wall of the ventilation cavity is provided with ventilation holes equidistantly and obliquely, the inner side of the body is provided with ventilation grooves in a circular array, and the fan module is fixedly mounted on the inner wall of the ventilation cavity.

[0015] Furthermore, the ventilation mechanism also includes an air guide block arranged at the center of the ventilation slot, a first air guide slot is opened on the side of the air guide block, a second air guide slot is opened on the side of the air guide block, a sealing block is fixedly installed on the inner wall of the ventilation slot in a mirror-like manner, and a second motor is fixedly installed on the side of the air guide block.

[0016] Compared with the prior art, the present invention can achieve the following beneficial effects:

[0017] 1. The present invention sets a driving mechanism, and the rotation of the first gear drives the second gear to engage and be constrained by the engagement of the ring gear, so that the first preparation barrel rotates simultaneously with the revolution of the second gear, and the material rotates and moves along with the second gear when inside the second preparation barrel. In this way, the material material inside the preparation barrel can be rotated and moved evenly and conveniently between the side and center positions of the preparation barrel. The heating module heats the preparation barrel to ensure that the material is heated evenly, thereby ensuring the carbonization effect of the material inside the preparation barrel.

[0018] 2. The present invention provides a collecting box and a cleaning block. The collecting box can act as a counterweight for the first preparation cylinder so that when the second gear rotates, the first preparation cylinder rotates in coordination with the counterweight of the collecting box to ensure that the collecting box is always facing downward, and the tar produced during carbonization flows to the inside of the collecting box for collection; the cleaning block can clean the inside of the first preparation cylinder and constrain and stabilize the second preparation cylinder during carbonization, so that the material can avoid flipping during carbonization and can collect the tar substances produced by it.

[0019] 3. The present invention sets an auxiliary mechanism, and the block drives the matching frame to rotate so that it maintains a synchronous position with the second gear. When the second gear rotates, the matching plate rotates synchronously inside the matching frame. The set auxiliary mechanism can rotate synchronously with the various components inside the driving mechanism when the driving mechanism is driven to rotate, so that the carbonization of the material is more stable and the possibility of material flipping is further reduced.

[0020] 4. The present invention sets a constraint plate. During the carbonization operation, the constraint plate rotates inside the second constraint groove to constrain it, thereby ensuring the stable rotation of other components. After the carbonization is completed, the constraint plate can be moved out of the second constraint groove through the connecting groove so that the auxiliary mechanism can be disassembled, which is convenient for subsequent material unloading operations.

[0021] 5. The present invention provides a ventilation mechanism, and the fan module can perform a suction operation to discharge the airflow into the ventilation cavity and out of the ventilation hole, so that it can supply oxygen and switch the airflow inside the preparation barrel, and the gas generated inside the preparation barrel during carbonization will not leak.

[0022] 6. The present invention sets an air guide block, and the second motor can drive the air guide block to rotate to different states and positions, so that the interior of the preparation barrel can adapt to various needs of oxygen supply, oxygen-deficient environment and exhaust cooling to ensure the carbonization effect of different materials. After carbonization is completed, centralized exhaust treatment and accelerated cooling of materials after carbonization are completed can also be carried out to improve the carbonization quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2It is a schematic diagram of the partial structure of the barrel prepared by the present invention;

[0025] Figure 3 It is a partial structural schematic diagram of the present invention;

[0026] Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure at point A;

[0027] Figure 5 It is a partial structural schematic diagram of the driving mechanism of the present invention;

[0028] Figure 6 It is a partial structural schematic diagram of the gear ring of the present invention;

[0029] Figure 7 It is a schematic diagram of the partial explosion structure of the driving mechanism of the present invention;

[0030] Figure 8 It is a schematic diagram of the partial explosion structure of the auxiliary mechanism of the present invention;

[0031] Fig. 9 It is a partial structural schematic diagram of the auxiliary mechanism of the present invention;

[0032] Fig.10 For the present invention Figure 2 A schematic diagram of the enlarged structure at B;

[0033] Fig.11 It is a schematic diagram of the partial explosion structure of the ventilation mechanism of the present invention;

[0034] Fig.12 Schematic diagram of the air path of the ventilation mechanism of the present invention in various states.

[0035] Wherein: 1. machine body; 11. heating module; 12. preparation barrel; 2. movable door; 3. base frame; 4. driving mechanism; 41. first motor; 42. first gear; 43. gear ring; 44. second gear; 45. first constraint groove; 46. first constraint block; 47. fixing rod; 48. first preparation barrel; 481. collecting box; 49. second preparation barrel; 491. blocking block; 492. cleaning block; 5. auxiliary mechanism; 51. card block; 52. matching frame; 53. matching plate; 531. matching hole; 54. constraint plate; 55. second constraint groove; 551. connecting groove; 6. ventilation mechanism; 61. ventilation cavity; 611. ventilation hole; 62. ventilation groove; 63. fan; 64. air guide block; 641. first air guide groove; 642. second air guide groove; 643. sealing block; 65. second motor. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following embodiments, unless otherwise specified, can all be obtained from commercial channels.

[0037] Example: Figure 1 and Figure 2 As shown, a biochar preparation device comprises a body 1, a movable door 2 is arranged on the side of the body 1, a bottom frame 3 is fixedly installed on the lower side of the body 1 for supporting the body 1, a heating module 11 for heating is arranged inside the body 1, a preparation barrel 12 is fixedly installed inside the body 1 and the heating module 11 covers the preparation barrel 12, the preparation barrel 12 is a hollow cylindrical barrel, a driving mechanism 4 that can be driven to rotate is arranged inside the body 1, an auxiliary mechanism 5 that can assist the driving mechanism 4 to rotate is arranged at a position corresponding to the driving mechanism 4 inside the body 1, and a ventilation mechanism 6 that can provide oxygen and cool down is arranged on the side of the body 1;

[0038] The driving mechanism 4 is used to rotate the material inside the preparation barrel 12 so that it can be evenly heated and carbonized;

[0039] like Figure 2 - Figure 7As shown, the driving mechanism 4 includes a first motor 41 fixedly mounted on the side of the machine body 1 away from the movable door 2, a first gear 42 is arranged inside the machine body 1, and the driving shaft of the first motor 41 passes through the machine body 1 and is fixedly connected to the side position thereof, a gear ring 43 is fixedly mounted on the inner side of the machine body 1 corresponding to the position of the first gear 42, the gear ring 43 is an inner gear ring plate, second gears 44 are equidistantly arranged in a circumferential array between the first gear 42 and the gear ring 43, and the second gears 44 are respectively in meshing state with the first gears 44, a first constraint groove 45 is opened on the inner side of the machine body 1 corresponding to the position of the second gear 44, the first constraint groove 45 is a circular annular groove with a convex cross-section, first constraint blocks 46 are equidistantly and movably mounted in the inner circumferential array of the first constraint groove 45, and the first constraint blocks 46 are respectively fixedly mounted on the side positions of the second gear 44, the first constraint blocks 46 are "T"-shaped cylindrical blocks, and the first gear 42 is provided on the inner side of the machine body 1. A fixing rod 47 is fixedly installed on the side of a motor 41, and the fixing rod 47 is a regular hexagonal rod. A first preparation cylinder 48 is equidistantly arranged in a circular array on the side of the second gear 44, and the first preparation cylinder 48 is rotatably installed on its side position through a rotating block. The first preparation cylinder 48 is a side hollow cylinder with circular holes equidistantly opened on the upper half side, and a collecting box 481 is clamped and installed on the lower side of the first preparation cylinder 48. A second preparation cylinder 49 is movably installed inside the first preparation cylinder 48, and the second preparation cylinder 49 is a side hollow cylinder with circular holes equidistantly opened on the side. A blocking block 491 is threadedly installed on the side of the second preparation cylinder 49, and the blocking block 491 fits on the side position of the first preparation cylinder 48. The blocking block 491 is a cylindrical block with a "T"-shaped cross-section. A cleaning block 492 is fixedly installed on the side of the second preparation cylinder 49 away from the blocking block 491, and the cleaning block 492 fits on the inner side of the first preparation cylinder 48;Specifically, the first motor 41 is provided to drive the first gear 42 to rotate, and the rotation of the first gear 42 drives the second gear 44 to engage and be constrained by the engagement of the gear ring 43, so that the second gear 44 rotates along with the first gear 42 and also rotates itself, so that the first preparation barrel 48 rotates while the second gear 44 revolves, and the first constraint block 46 is provided to rotate inside the first constraint groove 45 to constrain and guide the second gear 44, and the driving mechanism 4 is provided to make the material rotate and move along with the second gear 44 when it is inside the second preparation barrel 49, so that the material preparation barrel 12 is rotated and moved inside. It is even and convenient to switch between the side and center positions of the preparation barrel 12. The heating module 11 heats the preparation barrel 12 to ensure that the material is heated evenly. The set collecting box 481 can act as a counterweight for the first preparation barrel 48 so that when the second gear 44 rotates, the first preparation barrel 48 rotates in coordination with the counterweight of the collecting box 481 to ensure that the collecting box 481 is always facing downward. The tar generated during carbonization flows to the inside of the collecting box 481 for collection. After the carbonization is completed, the blocking block 491 is removed and the second preparation barrel 49 is pulled out. The set cleaning block 492 can clean the inside of the first preparation barrel 48 and the cleaning block 492 constrains and stabilizes the second preparation barrel 49 during carbonization.

[0040] The auxiliary mechanism 5 can be used to provide auxiliary support when the driving mechanism 4 is driven to rotate;

[0041] like Figure 3 , Figure 8 and Fig. 9As shown, the auxiliary mechanism 5 includes a block 51 movably sleeved on the side of the fixed rod 47, the block 51 is a round block with a regular hexagon on the inner side, and a matching frame 52 is equidistantly arranged in a circular array on the side of the block 51 corresponding to the position of the second gear 44, and the matching frame 52 and the block 51 are fixedly connected through a rectangular block, the matching frame 52 is a circular ring frame with a concave cross-section, and a matching plate 53 is movably installed inside the matching frame 52. The matching plate 53 is a circular plate with a Wang-shaped cross-section, and the matching plate 53 can rotate inside the matching frame 52. Matching holes 531 are equidistantly opened in a circular array on the side of the matching plate 53, and the blocking block 491 is movably installed in the position inside the matching hole 531, and a constraint plate 54 is fixedly installed on the side of the matching frame 52, and the constraint plate 54 is a rectangular plate, and a second constraint groove 55 is opened on the inner side of the preparation barrel 12 at the position corresponding to the constraint plate 54, and the constraint plate 54 is movably installed in the second constraint groove 55 Internally, the second constraint groove 55 is an annular groove, and connecting grooves 551 penetrating the preparation barrel 12 are equidistantly arranged in an array on the inner wall of the second constraint groove 55, and the connecting grooves 551 are rectangular grooves; specifically, the set block 51 rotates synchronously with the rotation of the fixing rod 47 driven by the first gear 42, and the block 51 drives the matching frame 52 to rotate so that it maintains a synchronous position with the second gear 44, and the set constraint plate 54 rotates inside the second constraint groove 55 to constrain it, and when the synchronous second gear 44 rotates, the matching plate 53 rotates synchronously inside the matching frame 52 to cooperate, and the auxiliary mechanism 5 can be synchronously coordinated with the internal components of the driving mechanism 4 when the driving mechanism 4 is driven to rotate, so that the material is more stable during carbonization, and the set constraint plate 54 after carbonization is completed can be moved out of the second constraint groove 55 through the connecting groove 551 so that the auxiliary mechanism 5 can be disassembled, which is convenient for subsequent material unloading operations;

[0042] The ventilation mechanism 6 can be used to supplement oxygen and perform internal and external airflow circulation during carbonization of materials, and perform internal circulation oxygen deficiency operation and external circulation cooling and exhaust operation according to different needs;

[0043] like Fig.10 and Fig.11As shown, the ventilation mechanism 6 includes a ventilation cavity 61 which is arranged in a circular array on the side of the preparation barrel 12, and the ventilation cavity 61 extends to the inner side of the machine body 1. The ventilation cavity 61 is a cylindrical cavity with a "T"-shaped cross section. Ventilation holes 611 extending through the preparation barrel 12 are equidistantly and obliquely arranged on the inner wall of the ventilation cavity 61. Ventilation grooves 62 extending through the preparation barrel 12 are equidistantly arranged on the inner side of the machine body 1 corresponding to the position of the ventilation cavity 61, and the ventilation grooves 62 extend through the ventilation groove 62 to the internal position of the machine body 1. The ventilation grooves 62 are "H"-shaped grooves. A fan module 63 is fixedly installed on the inner wall of the ventilation cavity 61. A rotatable air guide block 64 is arranged at the center of the ventilation groove 62. The air guide block 64 is a circular block. A first air guide groove 641 extending through the air guide block 64 is arranged on the side of the air guide block 64. The first air guide groove 641 is a herringbone groove. When the air guide block 64 is away from the first A second air guide groove 642 is provided on the side of the air guide groove 641 and passes through it. A sealing block 643 is fixedly installed on the inner wall of the ventilation groove 62 in a mirror-like manner and the sealing block 643 is attached to the side position of the air guide block 64. The sealing block 643 is a rectangular block made of rubber with an arc-shaped side. The sealing block 643 ensures the sealing of the side of the air guide block 64. A second motor 65 is fixedly installed on the side of the air guide block 64 and the second motor 65 is arranged inside the body 1. A rectangular installation groove is provided on the side of the body 1 corresponding to the position of the second motor 65. Specifically, the fan module 63 can be operated to perform an exhaust operation so that the airflow is discharged into the ventilation cavity 61 and discharged from the ventilation hole 611. The air guide block 64 is driven to rotate by the second motor 65 to change the exhaust source of the fan module 63, thereby changing the oxygen supply and internal and external circulation operations inside the preparation barrel 12.

[0044] Working principle:

[0045] Before carbonization preparation: open the movable door 2, remove the auxiliary mechanism 5 structure, remove the block 491 and then pull out the second preparation cylinder 49, place the material inside the second preparation cylinder 49 and then insert it into the first preparation cylinder 48, install the block 491 by thread, and then install the auxiliary mechanism 5 structure; wherein, place the constraint plate 54 at the position of the connecting groove 551, and manually rotate the matching plate 53 so that the matching hole 531 corresponds to the position of the block 491, push the constraint plate 54 to slide into the second constraint groove 55, and the block 51 is sleeved on the side of the fixing rod 47, and the installation of the auxiliary mechanism 5 structure is completed; after closing the movable door 2, the loading operation is completed;

[0046] During carbonization preparation: the heating module 11 performs heating operation, and the driving mechanism 4 works at the same time, the first motor 41 drives the first gear 42 to mesh with the second gear 44 and is constrained by the gear ring 43, so that the second gear 44 revolves and rotates. At this time, the material inside the second preparation cylinder 49 moves with the rotation. At this time, the first preparation cylinder 48 can rotate by itself under the influence of the counterweight of the collection box 481, so that the collection box 481 is always facing downward and the material will not be turned over. The hot air heats the material through the circular holes on the sides of the first preparation cylinder 48 and the second preparation cylinder 49, and the material rotates evenly and does not remain in a fixed position, and is evenly heated, so that the carbonization operation is performed;

[0047] According to different material requirements, the ventilation mechanism 6 is used in different states. When oxygen is required inside the preparation barrel 12, Fig.12 State 1: the second motor 65 drives the air guide block 64 to rotate to its position, and the fan module 63 draws external air through the ventilation cavity 61 to the ventilation hole 611 for oxygen supply operation. At this time, the internal airflow is not discharged to the outside;

[0048] When an oxygen-deficient environment is required inside the preparation barrel 12, such as Fig.12 State 2: The second motor 65 rotates the air guide block 64 to its position, and the external air cannot circulate. The fan module 63 can only extract the air inside the preparation barrel 12 through the ventilation cavity 61 and discharge it from the ventilation hole 611, forming an internal circulation operation. At this time, the inside of the preparation barrel 12 is in an oxygen-deficient state and the gas generated by carbonization inside the preparation barrel 12 will not be discharged.

[0049] When the interior of the preparation barrel 12 needs to be vented and cooled, Fig.12 In state three, the second motor 65 rotates the air guide block 64 to its position, and the fan module 63 draws external airflow through the ventilation cavity 61 to be discharged to the ventilation hole 611, pushing the internal airflow to be discharged from the ventilation slot 62 for cooling operation, and a gas purification device can be grafted at the exhaust airflow position to collect the airflow.

[0050] After carbonization: by cooling the inside of the preparation barrel 12 as mentioned above to reduce the waiting time, after the material is cooled, open the movable door 2, and reversely operate to remove the auxiliary mechanism 5 structure. Similarly, extract the second preparation cylinder 49 to pour out the carbonized material, and after a certain period of time, remove the collection box 481 to pour out the tar and other substances generated during carbonization collected inside.

[0051] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A biochar preparation device, comprising a body (1), a movable door (2) is arranged on the side of the body (1), a bottom frame (3) is fixedly installed on the lower side of the body (1), a heating module (11) is arranged inside the body (1), a preparation barrel (12) is fixedly installed inside the body (1), a driving mechanism (4) is arranged inside the body (1), an auxiliary mechanism (5) is arranged inside the body (1) at a position corresponding to the driving mechanism (4), and a ventilation mechanism (6) is arranged on the side of the body (1); It is characterized in that The driving mechanism (4) comprises a first motor (41), a first gear (42) and a second gear (44) are arranged on the side of the first motor (41), a first preparation tube (48) and a second preparation tube (49) are arranged on the side of the second gear (44), a collection box (481) is arranged on the side of the first preparation tube (48), and a cleaning block (492) is arranged on the side of the second preparation tube (49); The auxiliary mechanism (5) comprises a clamping block (51), a side of the clamping block (51) is provided with a matching frame (52), and a rotatable matching plate (53) is provided inside the matching frame (52); The ventilation mechanism (6) comprises a ventilation cavity (61), a fan module (63) is arranged on the side of the ventilation cavity (61), a rotatable air guide block (64) is arranged on the side of the fan module (63), and a first air guide groove (641) and a second air guide groove (642) capable of guiding air are arranged on the side of the air guide block (64).

2. A biochar preparation device according to claim 1, characterized in that: The driving mechanism (4) comprises a first motor (41) fixedly mounted on a side of the machine body (1); a first gear (42) arranged inside the machine body (1); a gear ring (43) fixedly mounted on the inner side of the machine body (1); and a second gear (44) arranged in a circumferential array between the first gear (42) and the gear ring (43).

3. A biochar preparation device according to claim 2, characterized in that: The driving mechanism (4) further comprises a first restraining groove (45) provided on the inner side of the machine body (1), first restraining blocks (46) being movably mounted in an array-like manner on the inner circumference of the first restraining groove (45) at equal intervals, and a fixing rod (47) being fixedly mounted on the side of the first gear (42) and the first motor (41).

4. A biochar preparation device according to claim 3, characterized in that: The driving mechanism (4) further comprises a first preparation cylinder (48) arranged in a circular array on the side of the second gear (44), a collecting box (481) is snap-fitted and mounted on the lower side of the first preparation cylinder (48), a second preparation cylinder (49) is movably mounted inside the first preparation cylinder (48), a blocking block (491) is threadedly mounted on the side of the second preparation cylinder (49), and a cleaning block (492) is fixedly mounted on the side of the second preparation cylinder (49).

5. A biochar preparation device according to claim 4, characterized in that: The auxiliary mechanism (5) comprises a clamping block (51) movably sleeved on the side of the fixing rod (47); a matching frame (52) is arranged in a circumferential array on the side of the clamping block (51) and the matching frame (52) and the clamping block (51) are fixedly connected through a rectangular block; a matching plate (53) is movably installed inside the matching frame (52); and matching holes (531) are opened in a circumferential array on the side of the matching plate (53).

6. A biochar preparation device according to claim 5, characterized in that: The auxiliary mechanism (5) also includes a restraining plate (54) fixedly mounted on the side of the matching frame (52), a second restraining groove (55) is provided on the inner side of the preparation barrel (12), and connecting grooves (551) are provided in a circumferential array on the inner wall of the second restraining groove (55).

7. The biochar preparation device according to claim 1, characterized in that: The ventilation mechanism (6) comprises a ventilation cavity (61) which is arranged in a circular array on the side of the preparation barrel (12); the inner wall of the ventilation cavity (61) is provided with ventilation holes (611) which are equidistantly inclined; the inner side of the machine body (1) is provided with ventilation grooves (62) in a circular array; and a fan module (63) is fixedly mounted on the inner wall of the ventilation cavity (61).

8. A biochar preparation device according to claim 7, characterized in that: The ventilation mechanism (6) further comprises an air guide block (64) arranged at the center of the ventilation slot (62), a first air guide slot (641) being opened on the side of the air guide block (64), a second air guide slot (642) being opened on the side of the air guide block (64), a sealing block (643) being fixedly mounted on the inner wall of the ventilation slot (62) in a mirror-image manner, and a second motor (65) being fixedly mounted on the side of the air guide block (64).

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