A sunflower straw biochar preparation device and method

Abstract

The present invention discloses a sunflower straw biochar preparation device and method, which relates to the technical field of biochar preparation. It includes a robotic arm and a heat insulation chamber. Among them, the robotic arm is used to send the preparation cylinder into the heat insulation chamber or take out the preparation cylinder from the heat insulation chamber. A heater is provided on the inner side wall of the heat insulation chamber, and a rotating plate is rotatably provided at the bottom of the heat insulation chamber. A plurality of rotating card groups arranged in a circumferential array are provided on the rotating plate, and the rotating card groups are used to quickly connect the preparation cylinder. A side sliding plate is slidably provided on the side of the heat insulation chamber; by rotating the rotating plate, the preparation cylinder can be made to approach the heater one by one to achieve the conversion between heating and cooling; by configuring a plurality of preparation cylinders, the columnar straw bodies can be processed in different regions, and each region is further subdivided by a partition plate, so that each columnar straw body can be evenly heated. The whole process has a high degree of automation and good preparation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of biochar preparation, and specifically to an apparatus and method for preparing sunflower straw biochar. Background Art

[0002] Biochar is a kind of porous solid particulate matter, which is produced by rich-carbon biomass (such as wood, crop waste, animal manure, etc.) under anaerobic or anoxic environment through high-temperature pyrolysis (generally the temperature reaches 400 °C or above), thus generating products such as biochar, syngas and liquid tar. Different pyrolysis conditions will lead to differences in the yield and properties of biochar.

[0003] The current sunflower straw biochar preparation apparatus performs well in terms of preparation effect, but there are still design defects, such as low heating system efficiency, unsmooth material transmission system, etc. These problems directly affect the preparation efficiency. In addition, small pores are a common problem in the preparation of sunflower straw biochar. The pore structure is one of the key factors of biochar performance. Small pores may weaken the adsorption capacity and catalytic capacity of biochar. This situation may be due to inaccurate temperature control, insufficient pyrolysis time or the structural characteristics of the raw materials themselves during the preparation process. Although high-temperature pyrolysis helps to form more pore structures, too high or too low temperature may lead to unsatisfactory pore structures.

[0004] Therefore, it is necessary to provide an apparatus and method for preparing sunflower straw biochar to solve the above problems. Summary of the Invention

[0005] To solve the above problems, the present invention provides the following technical solution: A sunflower straw biochar preparation apparatus, including a robotic arm and a heat insulation chamber. Among them, the robotic arm is used to send the preparation cylinder into the heat insulation chamber or take out the preparation cylinder from the heat insulation chamber. A heater is provided on the inner side wall of the heat insulation chamber. A rotating plate is rotatably provided at the bottom of the heat insulation chamber. A plurality of rotating card groups distributed in a circumferential array are provided on the rotating plate, and the rotating card groups are used for quickly connecting the preparation cylinder. A side sliding plate is slidably provided on the side of the heat insulation chamber;

[0006] By rotating the rotating plate, the preparation cylinder can be successively approximated to the heater to realize the conversion between heating up and cooling down;

[0007] A state adjustment component is provided on the top of the heat insulation chamber, and the state adjustment component is used to adjust the orientation of the preparation cylinder located on one side of the heater and vibrate the preparation cylinder vertically.

[0008] Preferably, it further includes a crusher and a drying and forming machine. The crusher is used to crush sunflower straws and send the crushed sunflower straws to the drying and forming machine. The drying and forming machine is used to dry and preliminarily form the crushed sunflower straws to form columnar straw bodies, and then intermittently send them to the preparation cylinder.

[0009] A blanking assembly is further arranged on one side of the drying and forming machine. The blanking assembly is used to intermittently release partition plates into the preparation cylinder, and the columnar straw bodies and the partition plates in the preparation cylinder are alternately distributed in sequence.

[0010] Preferably, the state adjustment assembly includes a base plate, a driving rod, a driving seat and a clamping groove. The base plate is fixedly embedded in the top of the heat insulation bin. A turntable is rotatably arranged in the base plate. A vertical limiting groove is opened on the inner wall of the turntable. A limiting strip corresponding to the limiting groove is arranged on the side of the driving rod. The driving rod is vertically and slidably arranged in the turntable in a limited manner. A clamping groove is fixed at the bottom of the driving rod. The clamping groove is used to clamp the preparation cylinder. The driving rod is also rotatably connected to the driving seat. The driving seat is driven by a cylinder to move vertically.

[0011] Preferably, the turntable is driven by a motor through a transmission mechanism.

[0012] A plurality of springs distributed in a circumferential array are fixed on the inner side wall of the clamping groove, and a guiding chuck is connected to the springs.

[0013] Preferably, the rotating clamping group includes a rotating seat, a supporting member and a second elastic member. The rotating seat is rotatably arranged on the rotating plate. The upper part of the rotating seat has a notch for installing the preparation cylinder. A supporting member is arranged at the bottom of the rotating seat. The supporting member supports on the rotating plate. A second elastic member is also connected between the supporting member and the rotating plate to provide reset for the rotating seat.

[0014] Preferably, a plurality of first elastic members are arranged in the notch of the rotating seat.

[0015] Preferably, it further includes a blanking assembly. The blanking assembly includes a blanking cylinder, a blanking plate and a blanking cylinder. A plurality of partition plates are preset in the blanking cylinder. The partition plates are made of porous heat-conducting materials. The blanking plate is slidably arranged at the bottom of the blanking cylinder. The blanking plate is driven by the blanking cylinder.

[0016] Preferably, an air inlet pipe and an air outlet pipe are further communicated with the side of the heat insulation bin. The air inlet pipe is also connected to an external gas tank. The external gas tank is used to provide inert gas.

[0017] A method for preparing sunflower straw biochar includes the following steps:

[0018] S1. Collect sunflower straws and wash them to remove surface impurities and dust;

[0019] S2. Send the washed sunflower straws to a crusher for crushing;

[0020] S3. Send the crushed sunflower straws to a drying and forming machine, which is used to dry and preliminarily form the crushed straws to form columnar straw bodies, and the columnar straw bodies are intermittently sent to a preparation cylinder;

[0021] S4. The feeding assembly intermittently releases partition plates into the preparation cylinder, and the columnar straw bodies in the preparation cylinder and the partition plates are distributed alternately in sequence;

[0022] S5. The robotic arm sends the preparation cylinder containing partition plates and columnar straw bodies to an insulation bin;

[0023] S6. Start the heater and maintain the carbonization temperature between 400°C and 700°C;

[0024] S7. The rotating plate rotates intermittently, and the state adjustment assembly drives the preparation cylinder located below it to rotate slowly, and then the state adjustment assembly resets;

[0025] S8. Repeat S7 until the carbonization time is reached. At this time, open the side sliding plate and use the robotic arm to take out the preparation cylinder.

[0026] Compared with the prior art, the present invention provides a device and method for preparing sunflower straw biochar, which has the following beneficial effects:

[0027] The present invention realizes the automatic feeding and taking out of the preparation cylinder through the robotic arm, greatly reducing the cumbersome manual operation and improving the automation degree of the preparation process. The combined use of the robotic arm and the rotating plate ensures the precise positioning and efficient conversion of the preparation cylinder in the insulation bin, further improving the preparation efficiency.

[0028] In the present invention, the heater provided on the inner side wall of the insulation bin can heat the entire internal space, and the rotation design of the rotating plate enables the preparation cylinder to approach the heater one by one, thus realizing the flexible conversion between heating up and cooling down. This temperature control strategy not only helps to accurately control the temperature during the pyrolysis process, but also can adjust the pyrolysis conditions according to actual needs to optimize the pore structure and performance of the biochar.

[0029] The present invention can perform regional treatment on the columnar straw bodies by configuring multiple preparation cylinders, and each region is further subdivided by partition plates, so that each columnar straw body can be evenly heated to ensure the carbonization effect. Description of the Drawings

[0030] Figure 1It is a front view structural schematic diagram of a sunflower straw biochar preparation device;

[0031] Figure 2 It is a front view structural schematic diagram of a crusher, a drying and forming machine, and a feeding component in a sunflower straw biochar preparation device;

[0032] Figure 3 It is Figure 1 The enlarged structural schematic diagram at A in

[0033] Figure 4 It is a front view structural schematic diagram of a state adjustment component in a sunflower straw biochar preparation device;

[0034] Figure 5 It is a three-dimensional structural schematic diagram of a state adjustment component in a sunflower straw biochar preparation device;

[0035] In the figure: 1. Crusher; 2. Drying and forming machine; 3. Feeding component; 4. Partition board; 5. Preparation cylinder; 6. First elastic member; 7. Robot arm; 8. Heat insulation bin; 9. State adjustment component; 10. Rotating plate; 11. First motor; 12. Side sliding plate; 13. Heater; 14. Carrier vehicle; 15. Intake pipe; 16. Exhaust pipe; 17. Rotating base; 18. Support member; 19. Second elastic member; 21. Forming cylinder; 22. Auger; 23. Feed inlet; 24. Baffle; 25. First gear; 26. Second gear; 27. Second motor; 31. Feeding cylinder; 32. Feeding plate; 33. Feeding cylinder; 91. Base plate; 92. Driving rod; 93. Driving seat; 94. Cylinder; 95. Turntable; 96. Third motor; 97. Card slot; 98. Guide chuck. Detailed implementation manners

[0036] Terms such as "first", "second", etc. in the description, claims, and the above-mentioned accompanying drawings description of this application are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, which is only a way of distinction adopted when describing objects with the same attributes in the embodiments of this application. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, so that a process, method, system, product, or device including a series of units does not necessarily have to be limited to those units, but may include other units that are not clearly listed or are inherent to these processes, methods, products, or devices.

[0037] Embodiment: Please refer to Figures 1 - 5, in the embodiments of the present invention, a sunflower straw biochar preparation device is provided, including a robotic arm 7 and a heat insulation chamber 8. Among them, the robotic arm 7 is used to send the preparation cylinder 5 into the heat insulation chamber 8 or take out the preparation cylinder 5 from the heat insulation chamber 8. A heater 13 is provided on the inner side wall of the heat insulation chamber 8. A rotating plate 10 is rotatably provided at the bottom of the heat insulation chamber 8. The rotating plate 10 is driven by a first motor 11. A plurality of rotating card groups distributed in a circumferential array are provided on the rotating plate 10. The rotating card groups are used to quickly connect the preparation cylinder 5. A side sliding plate 12 is slidably provided on the side of the heat insulation chamber 8;

[0038] By rotating the rotating plate 10, the preparation cylinder 5 can be successively brought close to the heater 13 to achieve the conversion between heating and cooling;

[0039] A state adjustment component 9 is provided at the top of the heat insulation chamber 8. The state adjustment component 9 is used to adjust the orientation of the preparation cylinder 5 on one side of the heater 13 and vibrate the preparation cylinder 5 vertically.

[0040] It should be explained that by rotating the rotating plate 10, the preparation cylinder 5 can be successively brought close to the heater 13 to achieve the conversion between heating and cooling. Its meaning is that the heater 13 can heat the entire internal space of the heat insulation chamber 8, and the position closest to the heater 13 is the hottest. Therefore, by rotating the rotating plate 10, the preparation cylinder 5 can be successively brought close to the heater 13, and the conversion between heating and cooling can be achieved. In this way, the pores can be increased.

[0041] Furthermore, in the process of biochar preparation, through specific temperature control and heating-cooling cycles, the physical and chemical properties of biochar can be affected. For example, heating to 500 degrees, naturally cooling to 450 degrees, and then heating to 500 degrees again. Such repeated heating-cooling cycles contribute to the optimization of the internal structure of biochar. At high temperatures, the organic matter in biomass undergoes pyrolysis and polycondensation reactions to form a more stable aromatic structure. The cooling process can consolidate these structures, thereby enhancing the overall stability of biochar and increasing the pores.

[0042] In addition, the preparation device further includes a crusher 1 and a drying and forming machine 2. Among them, the crusher 1 is used to crush sunflower straw and send the crushed sunflower straw into the drying and forming machine 2. The drying and forming machine 2 is used to dry and preliminarily form the crushed sunflower straw to form a columnar straw body, and then intermittently send it into the preparation cylinder 5;

[0043] A feeding component 3 is further provided on one side of the drying and forming machine 2. The feeding component 3 is used to intermittently release a partition plate 4 into the preparation cylinder 5. The columnar straw bodies in the preparation cylinder 5 and the partition plates 4 are alternately distributed in sequence.

[0044] Among them, the crusher 1 can efficiently crush the sunflower straw into particles of appropriate size, providing uniform raw materials for the subsequent drying and forming processes. The drying and forming machine 2 is responsible for drying the crushed straw to an appropriate moisture content and initially forming it into a columnar straw body. This step not only removes the excess moisture in the raw materials but also improves the density and stability of the raw materials, laying a good foundation for the subsequent pyrolysis process. By integrating the three steps of crushing, drying, and forming, the continuous processing and efficient utilization of the raw materials are achieved. This greatly shortens the preparation cycle and improves the production efficiency of biochar.

[0045] Specifically, the drying and forming machine 2 includes a forming cylinder 21, a screw conveyor 22, a baffle 24, and a second motor 27. Among them, a screw conveyor 22 is rotatably arranged in the forming cylinder 21, and the screw conveyor 22 is driven by the second motor 27. There is a feed inlet 23 above the forming cylinder 21, and a baffle 24 is rotatably arranged in the feed inlet 23. A first gear 25 is connected to the baffle 24, and the first gear 25 meshes with a second gear 26. The second gear 26 is fixed on the screw conveyor 22. The baffle 24 is used to block the material from the crusher 1 to prevent excessive material from entering the drying and forming machine 2. The side wall of the forming cylinder 21 also has a heater.

[0046] In addition, in this embodiment, by configuring a plurality of preparation cylinders 5, the pyrolysis treatment of the columnar straw bodies in multiple regions can be realized simultaneously. This way of regional treatment improves the preparation efficiency. The feeding assembly 3 intermittently releases partition plates 4 into the preparation cylinders 5, so that the columnar straw bodies and the partition plates 4 are distributed alternately in sequence. This design not only helps to keep the material distribution in the preparation cylinders 5 uniform but also can prevent the materials from sticking or piling up during the pyrolysis process, thereby ensuring that each columnar straw body can be heated evenly.

[0047] The setting of the partition plates 4 further subdivides each treatment area, enabling each columnar straw body to obtain a more uniform heat distribution during the pyrolysis process. This helps to improve the carbonization uniformity of biochar and the product quality.

[0048] In this embodiment, the state adjustment component 9 includes a substrate 91, a driving rod 92, a driving seat 93, and a clamping groove 97. The substrate 91 is fixedly embedded in the top of the heat insulation chamber 8. A turntable 95 is rotatably arranged in the substrate 91. A vertical limiting groove is formed in the inner wall of the turntable 95. A limiting strip corresponding to the limiting groove is provided on the side of the driving rod 92. The driving rod 92 is vertically and slidably arranged in the turntable 95 in a limited manner. A clamping groove 97 is fixed to the bottom of the driving rod 92. The clamping groove 97 is used for clamping the preparation cylinder 5. The driving rod 92 is also rotatably connected to the driving seat 93. The driving seat 93 is driven by a cylinder 94 to move vertically. Therefore, when the cylinder 94 expands and contracts, the clamping groove 97 moves vertically. When the turntable 95 rotates, the clamping groove 97 rotates.

[0049] The turntable 95 is driven by a third motor 96 through a transmission mechanism. The transmission mechanism is any one of a gear transmission mechanism, a belt pulley transmission mechanism, and a friction wheel transmission mechanism.

[0050] A plurality of springs distributed in a circumferential array are fixed on the inner side wall of the clamping groove 97. A guiding chuck 98 is connected to the spring. The contact effect between the clamping groove 97 and the preparation cylinder 5 can be improved by the provided spring and guiding chuck 98.

[0051] In this embodiment, the rotating card group includes a rotating seat 17, a support member 18, and a second elastic member 19. The rotating seat 17 is rotatably arranged on the rotating plate 10. The upper part of the rotating seat 17 has a notch for installing the preparation cylinder 5. A support member 18 is arranged at the bottom of the rotating seat 17. The support member 18 supports on the rotating plate 10. A second elastic member 19 is also connected between the support member 18 and the rotating plate 10 for providing a reset for the rotating seat 17.

[0052] In addition, a plurality of first elastic members 6 are arranged in the notch of the rotating seat 17. When the state adjustment component 9 presses down the preparation cylinder 5, the first elastic members 6 can provide a space for the downward movement of the preparation cylinder 5, provide a certain buffer, and provide a reset after the buffer. The up and down displacement of the preparation cylinder 5 can vibrate the columnar straw body inside it, prevent it from adhering to the inner wall of the preparation cylinder 5, and improve the carbonization effect.

[0053] In this embodiment, the preparation device of the present invention also includes a feeding assembly 3, which includes a feeding barrel 31, a feeding plate 32 and a feeding cylinder 33, wherein a plurality of partition plates 4 are pre-installed in the feeding barrel 31, and the partition plates 4 are made of a porous heat-conductive material. A feeding plate 32 is slidably arranged at the bottom of the feeding barrel 31, and the feeding plate 32 is driven by the feeding cylinder 33. That is to say, the feeding plate 32 actually plays a blocking role, and the blocking state of the feeding plate 32 is also changed by the extension and contraction of the feeding cylinder 33, so that the partition plates 4 can move downward under the action of gravity and detach from the feeding barrel 31.

[0054] In this embodiment, the side of the temperature-isolating chamber 8 is also connected with an air inlet pipe 15 and an air outlet pipe 16, wherein the air inlet pipe 15 is also connected to an external gas tank, and the external gas tank is used to provide inert gas.

[0055] Inert gases (such as nitrogen, argon, etc.) have stable chemical properties and are not easy to react chemically with other substances. During the pyrolysis process, the introduction of inert gases can effectively prevent the oxidation reaction between biomass and oxygen in the air, thereby avoiding the biomass from being burned before pyrolysis, ensuring the smooth progress of the pyrolysis process.

[0056] The presence of inert gas helps to maintain a stable gas environment in the insulation chamber 8 and reduce heat loss during the pyrolysis process. The pyrolysis process carried out under the protection of inert gas can generate biochar with higher porosity and better adsorption performance.

[0057] In this embodiment, a method for preparing sunflower straw biochar is also provided, comprising the following steps:

[0058] S1. Collect sunflower stalks and wash them to remove impurities and dust on the surface;

[0059] S2. The cleaned sunflower straw is sent to the crusher 1 for crushing;

[0060] S3. The crushed sunflower straw is sent to the drying and molding machine 2, which is used to dry and preliminarily mold the crushed straw to form a columnar straw body, which is intermittently sent to the preparation cylinder 5;

[0061] S4. The material discharging assembly 3 intermittently releases the partition plate 4 into the preparation tube 5, and the columnar straw body in the preparation tube 5 and the partition plate 4 are alternately distributed in sequence. The presence of the partition plate 4 helps prevent the material from sticking or accumulating during the carbonization process, ensures uniform heating, and ensures uniform carbonization effect;

[0062] S5. The robot arm 7 sends the preparation tube 5 containing the partition plate 4 and the columnar straw body to the insulation bin 8;

[0063] S6. The heater 13 is started, and the carbonization temperature is maintained between 400°C and 700°C. This temperature range is conducive to the formation of biochar;

[0064] S7. The turntable 10 rotates intermittently, and the state adjustment component 9 drives the preparation cylinder 5 located below it to rotate slowly, and then the state adjustment component 9 resets. By rotating the turntable 10, the preparation cylinder 5 can approach the heater 13 one by one, enabling the conversion between heating up and cooling down, so that the pores can be increased;

[0065] S8. Repeat S7 until the carbonization time is reached. At this time, the side slide plate 12 is opened, and the preparation cylinder 5 is taken out by the robotic arm 7 and sent to the carrier vehicle 14.

[0066] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A sunflower straw biochar preparation device, comprising a mechanical arm (7) and a temperature-insulating chamber (8), wherein: The robot arm (7) is used to deliver the preparation cylinder (5) to the insulation bin (8) or to take out the preparation cylinder (5) from the insulation bin (8). The inner wall of the insulation bin (8) is provided with a heater (13). ...) on the inner wall. The robot arm (7) is used to deliver the preparation cylinder (5) to the insulation bin (8) or to take out the preparation cylinder (5) from the insulation bin (8). The inner wall of the insulation bin (8) is provided with a heater (13) on the inner wall. The inner wall of the insulation bin (8) is provided with a heater (13) on the inner wall. The inner wall of the insulation bin (8) is provided with a heater (13) on the inner wall. The inner wall of the insulation bin (8) is provided with a heater (13) on the inner wall. The inner wall of the insulation bin (8) is provided with a heater (13) on the inner wall. The inner wall of the insulation bin (8) is provided with a heater (13) on the inner wall. The inner wall of the insulation bin (8) is provided with a heater (13) on the inner wall. The inner wall A state adjustment component (9) is arranged on the top of the temperature-isolating bin (8), and the state adjustment component (9) is used to adjust the orientation of the preparation cylinder (5) located on one side of the heater (13) and to vibrate the preparation cylinder (5) in the vertical direction, which includes: the rotating plate (10) rotates intermittently, the state adjustment component (9) drives the preparation cylinder (5) located below it to rotate slowly, and then the state adjustment component (9) is reset; The rotating card assembly comprises a rotating seat (17), a supporting member (18), and a second elastic member (19), wherein the rotating seat (17) is rotatably arranged on the rotating plate (10), the upper part of the rotating seat (17) is provided with a notch for mounting the preparation cylinder (5), the bottom of the rotating seat (17) is provided with a supporting member (18), the supporting member (18) is supported on the rotating plate (10), and a second elastic member (19) is further connected between the supporting member (18) and the rotating plate (10) for providing reset for the rotating seat (17); A plurality of first elastic members (6) are arranged in the notches of the rotating seat (17).

2. A sunflower straw biochar preparation device according to claim 1, characterized in that: It also comprises a crusher (1) and a drying and forming machine (2), wherein the crusher (1) is used to crush sunflower straws and send the crushed sunflower straws to the drying and forming machine (2), and the drying and forming machine (2) is used to dry and preliminarily form the crushed sunflower straws to form columnar straw bodies, and then intermittently send them to the preparation cylinder (5); a feeding assembly (3) is also provided on one side of the drying and forming machine (2), and the feeding assembly (3) is used to intermittently release partition plates (4) into the preparation cylinder (5), and the columnar straw bodies and the partition plates (4) in the preparation cylinder (5) are alternately distributed in sequence.

3. The sunflower straw biochar preparation device according to claim 1, characterized in that: The state adjustment component (9) comprises a base plate (91), a driving rod (92), a driving seat (93) and a card slot (97), wherein the base plate (91) is fixedly embedded in the top of the temperature-isolating chamber (8), a turntable (95) is rotatably arranged in the base plate (91), and a vertical limit groove is provided on the inner wall of the turntable (95), and a side portion of the driving rod (92) has a limit strip corresponding to the limit groove, and the driving rod (92) is vertically limited and slidably arranged in the turntable (95), and a card slot (97) is fixed at the bottom of the driving rod (92), and the card slot (97) is used to clamp the preparation cylinder (5), and the driving rod (92) is also rotatably connected to the driving seat (93), and the driving seat (93) is driven by a cylinder (94) to move vertically.

4. The sunflower straw biochar preparation device according to claim 3, characterized in that: The rotating disk (95) is driven by a third motor (96) through a transmission mechanism; a plurality of springs distributed in a circular array are fixed on the inner side wall of the clamping slot (97), and a guide clamp (98) is connected to the spring.

5. The sunflower straw biochar preparation device according to claim 1, characterized in that: It also includes a material discharge component (3), the material discharge component (3) includes a material discharge barrel (31), a material discharge plate (32) and a material discharge cylinder (33), wherein a plurality of partition plates (4) are pre-installed in the material discharge barrel (31), the partition plates (4) are made of porous heat-conducting material, a material discharge plate (32) is slidably arranged at the bottom of the material discharge barrel (31), and the material discharge plate (32) is driven by the material discharge cylinder (33).

6. The sunflower straw biochar preparation device according to claim 1, characterized in that: The side of the temperature-insulating chamber (8) is also connected to an air inlet pipe (15) and an air outlet pipe (16), wherein the air inlet pipe (15) is also connected to an external gas tank, and the external gas tank is used to provide inert gas.

7. A method for preparing sunflower straw biochar, which is prepared by using the sunflower straw biochar preparation device according to any one of claims 2 to 6, characterized in that: The steps include: S1. Collect sunflower stalks and wash them to remove impurities and dust on the surface; S2. The cleaned sunflower straw is sent to a crusher (1) for crushing; S3. The crushed sunflower straw is sent to a drying and molding machine (2), wherein the drying and molding machine (2) is used to dry and preliminarily mold the crushed straw to form a columnar straw body, and the columnar straw body is intermittently sent to the preparation cylinder (5); S4. The material discharge assembly (3) intermittently releases the partition plate (4) into the preparation cylinder (5), and the columnar straw body in the preparation cylinder (5) and the partition plate (4) are alternately distributed in sequence; S5. The robotic arm (7) delivers the preparation tube (5) containing the partition plate (4) and the columnar straw body to the insulation bin (8); S6. The heater (13) is started to maintain the carbonization temperature between 400°C and 700°C; S7. The rotating plate (10) rotates intermittently, the state adjustment component (9) drives the preparation cylinder (5) located below it to rotate slowly, and then the state adjustment component (9) is reset; S8. Repeat S7 until the carbonization time is reached, then open the side slide (12) and use the robotic arm (7) to take out the preparation cylinder (5).

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