Straw carbonization and field returning integrated carbon sequestration device

Abstract

The invention relates to the technical field of straw returning, in particular to a straw carbonization and returning integrated carbon sequestration device which comprises a top plate, a carbonization mechanism, a carbon injection mechanism and a rotary tillage mechanism, the top plate is provided with a traction frame, and the rotary tillage mechanism comprises two rotary tillage assemblies used for soil loosening and mixing respectively. The carbon injection mechanism comprises a lifting mechanism, a driving assembly and a plurality of groups of carbon injection assemblies with pulse type auxiliary discharging assemblies, and the carbonization mechanism comprises a carbonization cylinder, a combustor and a material distribution assembly. The device is connected with a tractor through a traction frame, when the device advances in a field, the rotary tillage assembly loosens soil, the carbonization mechanism carbonizes straw, the straw is smashed and evenly distributed to the carbon injection assemblies, the lifting mechanism drives the carbon injection assemblies to deeply insert soil, and the driving assembly is matched with pulse type discharging to achieve deep and even carbon injection of biochar. And finally, the other rotary tillage assembly completes carbon and soil mixing. According to the device, straw returning-to-field integrated operation is achieved, the problem that traditional carbon distribution is not uniform is solved, pulse discharging effectively prevents blocking, the carbonization effect is stable, and the carbon injection depth can be accurately regulated and controlled.

Description

Technical Field

[0001] This invention relates to the manufacture of mechanized agricultural and horticultural machinery, and particularly to the field of straw return technology, specifically an integrated carbon sequestration device for straw carbonization and return to the field. Background Technology

[0002] Returning crop straw to the field through carbonization is an agricultural technology that involves pyrolyzing and carbonizing crop straw to produce biochar, which is then returned to the field. By integrating biochar into the soil, it achieves agricultural carbon sequestration, improves soil structure, enhances soil fertility and water retention capacity, and promotes green agricultural development.

[0003] In existing technologies, the return of biochar from straw carbonization to the field mostly involves manually or using simple equipment to directly spread the biochar on the soil surface, followed by surface tillage and mixing using a rotary tiller; a few integrated devices have simple biochar dispensing structures that can only achieve surface dispensing. Existing technologies have the following shortcomings: The method of spreading biochar on the soil surface and then rotary tilling is prone to uneven distribution, resulting in a high concentration of biochar on the surface and very little biochar in the deeper layers. This leads to low integration of biochar with the soil, and the effects of carbon sequestration and soil improvement need to be improved. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated carbon sequestration device for straw carbonization and returning to the field, so as to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions: An integrated carbon sequestration device for straw carbonization and returning to the field includes: The top plate has a traction frame fixedly installed at its front end, an clearance groove is provided on the top surface of the top plate, and a storage box is provided on the top surface of the top plate. A carbonization mechanism fixedly installed on the top surface of the top plate; A carbon injection mechanism fixedly installed at the bottom of the top plate includes a lifting mechanism, a drive assembly, and multiple sets of carbon injection components. The multiple sets of carbon injection components are fixedly connected to the lifting mechanism through a through-type connection, and the multiple sets of carbon injection components are driven by the drive assembly. The carbon injection component includes a feeding structure that is connected to the carbonization mechanism. A pulse-type auxiliary feeding component that is driven by the feeding structure is fixedly installed through the top of the feeding structure. The lifting mechanism is used to drive the multiple sets of carbon injection components to perform an overall lifting movement, and the drive assembly is used to drive the feeding structure to drive the pulse-type auxiliary feeding component to perform a pulse feeding action. A rotary tillage mechanism is fixedly installed at the bottom of the top plate. The rotary tillage mechanism includes two sets of rotary tillage components respectively arranged on both sides of the carbon injection mechanism and a drive mechanism for driving the two sets of rotary tillage components. The two sets of rotary tillage components are used for loosening soil and mixing soil, respectively.

[0006] Furthermore, the lifting mechanism includes a lifting plate located directly below the clearance groove. Electric push rods are fixedly installed at both ends of the top surface of the lifting plate. The telescopic part of the electric push rod slides through the top plate, and the fixed part of the electric push rod is fixedly installed on the top surface of the top plate.

[0007] Furthermore, multiple sets of the carbon injection components are arrayed along the length of the lifting plate. The feeding structure of the carbon injection components includes a hollow rod that is fixedly connected to the lifting plate. A through groove is provided in the upper part of the hollow rod, and a storage cavity located below the through groove is provided in the side wall of the hollow rod. An annular groove communicating with the interior of the hollow rod is provided at the bottom of the storage cavity. A cone head is slidably installed in the hollow rod. A linkage shaft is fixedly connected to the top of the cone head. A protrusion is fixedly connected to the periphery of the linkage shaft. The end of the protrusion away from the linkage shaft slides through the hollow rod through a through groove to the outside of the hollow rod and is fixedly connected to the drive assembly. The storage chamber is fixedly connected to a corrugated pipe near the top. A guide pipe is fixedly connected to the end of the corrugated pipe away from the hollow rod. The end of the guide pipe away from the corrugated pipe is connected to the carbonization mechanism. When the protrusion is located at the bottom of the through groove, the tapered part of the cone head is located outside the hollow rod, and the outer periphery of the cone head seals the annular groove. When the protrusion is located near the top of the through groove, the tapered part of the cone head is aligned with the annular groove, and the annular groove is in the open state.

[0008] Furthermore, the pulse-assisted feeding assembly includes a hollow column fixedly installed at the top of the hollow rod, a coaxial cylindrical isolation cover fixedly installed on the inner bottom surface of the hollow column, a gap between the cylindrical isolation cover and the inner top surface of the hollow column, a piston slidably installed in the cylindrical isolation cover, and the bottom surface of the piston fixedly connected to the top of the linkage shaft. The cylindrical isolation cover is slidably fitted with a lifting ring, and the outer periphery of the lifting ring is slidably connected to the inner wall of the hollow column. Multiple circumferentially arrayed springs are fixedly connected between the bottom surface of the lifting ring and the inner bottom surface of the hollow column. The top surface of the hollow column is provided with an air inlet, and the air inlet is provided with a one-way valve that only allows air to enter; A blowpipe is fixedly connected to the center of the outer periphery of the hollow column, and the other end of the blowpipe is fixedly connected to the guide pipe.

[0009] Furthermore, the drive assembly includes a protruding plate fixedly installed at the middle position of the side of the lifting plate. A mounting base is fixedly installed on the top surface of the protruding plate. A motor four is fixedly installed on the side of the mounting base. The output shaft of the motor four rotates through the mounting base and is fixedly installed on a disc. A protruding post one is fixedly installed on the side of the disc near the outer edge. A connecting rod is rotatably installed around the protruding post one. A protruding post two is rotatably installed at the other end of the connecting rod. A horizontally arranged linkage bar is fixedly connected to the end of the protruding post two away from the connecting rod. The side of the linkage bar away from the protruding post two is fixedly connected to the end of a plurality of protrusions away from the linkage shaft.

[0010] Furthermore, the carbonization mechanism includes a burner and a carbonization cylinder horizontally placed above the top plate. A sealed feeding assembly is fixedly installed through one end of the periphery of the carbonization cylinder, and a distributing assembly is fixedly installed through the other end of the carbonization cylinder. The discharge end of the distributing assembly is connected through to multiple guide pipes. A second motor is fixedly installed at the sealed end of the carbonization cylinder. The output shaft of the second motor rotates through the end of the carbonization cylinder and is then fixedly connected to a transmission shaft coaxial with the carbonization cylinder. A spiral blade that slides in contact with the inside of the carbonization cylinder is fixedly installed on the periphery of the transmission shaft. The pitch of the spiral blade is designed in a gradient manner, and is set to a large pitch, a medium pitch, and a small pitch in sequence from the sealed end to the open end of the carbonization cylinder. The carbonization cylinder is fitted with a jacket, and the jacket has an upward-facing exhaust port at the upper part. The burner head extends to the lowest point inside the jacket.

[0011] Furthermore, the material distribution assembly includes a rectangular distribution box fixedly installed on the top surface of the top plate. Two mounting shafts are rotatably installed between the two ends of the rectangular distribution box. Screw blades are fixedly installed on the mounting shafts. A gear is fixedly installed at one end of the mounting shaft after it rotatably passes through the end of the rectangular distribution box. The two gears mesh. The rectangular distributor box is fixedly mounted with motor five at one end away from the gear, and a mounting shaft is rotated through the end of the rectangular distributor box and then fixedly connected to the output shaft end of motor five at one end near motor five. A conduit is fixedly installed on the top surface of the rectangular diversion box near the end, and a crushing cylinder is fixedly installed at the top end of the conduit. The end of the crushing cylinder is connected to the end of the carbonization cylinder. A motor is fixedly installed on the top surface of the crushing cylinder. The output shaft of the motor is rotated through the crushing cylinder and then fixedly connected to a crushing shaft. Multiple uniformly distributed crushing blades are fixedly installed around the crushing shaft. The bottom surface of the rectangular diversion box is arranged with a plurality of discharge pipes in an array along its length, the number of which is equal to the number of guide pipes. The bottom ends of the plurality of discharge pipes are respectively fixedly connected to the ends of the plurality of guide pipes away from the hollow rod.

[0012] Furthermore, the sealed feeding assembly includes a pipe that is fixedly installed in a through manner around the periphery of the carbonization cylinder. A hollow disc is provided in the middle of the pipe. A feeding disc is provided in the hollow disc and slides in contact with the inner wall of the hollow disc. Multiple material grooves are arranged in an axial array around the periphery of the feeding disc about the axis of the hollow disc. A motor for driving the feeding disc to rotate is fixedly installed at one end of the hollow disc. A funnel is fixedly installed at the top of the pipe.

[0013] Furthermore, the rotary tillage assembly includes a baffle fixedly installed on the bottom surface of the top plate, a rotating shaft rotatably installed between the two ends of the baffle, and a driven pulley fixedly installed at one end of the rotating shaft after it rotates through the end of the baffle. Multiple evenly distributed cutting tools are fixedly mounted on the periphery of the rotating shaft.

[0014] Furthermore, the drive mechanism includes a motor fixedly mounted on the top surface of the top plate, a drive pulley fixedly mounted on the output shaft end of the motor, and a belt installed between the drive pulley and the two driven pulleys.

[0015] The beneficial effects of this invention are: 1. This invention achieves uniform distribution of biochar at a specified depth in the soil through a process of loosening the soil, deep pulse carbon injection, and mixing biochar with soil. This is achieved by coordinating multiple sets of carbon injection components working simultaneously and material distribution components providing uniform material supply. This improves the integration of biochar with the soil and results in significant carbon sequestration and soil improvement effects.

[0016] 2. The pulse-type auxiliary feeding component of the present invention uses air pressure purging to achieve pulse feeding, which not only allows the charcoal to diffuse in the soil, but also purifies the feeding pipe and the feeding pipeline in real time, avoiding the accumulation and blockage of charcoal, and ensuring the continuous and stable operation of the device.

[0017] 3. The lifting mechanism drives the carbon injection component to complete the reciprocating motion within the soil depth range. The drive component drives the carbon injection component to perform high-frequency pulse feeding, so that the feeding action covers the entire lifting stroke of the carbon injection component, realizing continuous carbon distribution in soil at different depths within the stroke, solving the problem of local enrichment in single-depth carbon injection, and further improving the uniformity of biochar distribution in the soil.

[0018] 4. The material distribution component crushes and homogenizes the biochar using a two-way auger, resulting in uniform biochar particle size that is easier to integrate with the soil. It also ensures consistent material supply from multiple carbon injection components, further improving the uniformity of carbon distribution. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 A three-dimensional diagram from another angle; Figure 3 This is a three-dimensional schematic diagram of the carbonization mechanism in this invention; Figure 4 This is a three-dimensional schematic diagram of the spiral blade in this invention; Figure 5 This is a three-dimensional schematic diagram of the connection relationship between the rectangular distribution box and the top plate in this invention; Figure 6 This is a three-dimensional schematic diagram of the internal structure of the rectangular flow divider box in this invention; Figure 7 This is a three-dimensional schematic diagram of the connection relationship between the carbon injection mechanism, the top plate, and the carbonization mechanism in this invention; Figure 8 yes Figure 7 Enlarged view of section A; Figure 9 This is a three-dimensional schematic diagram of the carbon injection mechanism in this invention; Figure 10 This is a three-dimensional schematic diagram of the carbon injection component in this invention; Figure 11 This is a three-dimensional schematic diagram of the connection relationship between the carbon injection component and the linkage bar in this invention; Figure 12 This is a three-dimensional schematic diagram of the internal structure of the carbon injection component in this invention; Figure 13 yes Figure 12 Enlarged view of section B; Figure 14 yes Figure 12 Enlarged view of section C; Figure 15 This is a schematic diagram of the sealed feeding assembly; The attached figures are labeled as follows: 1-Top plate, 2-Traction frame, 3-Rotary tillage mechanism, 4-Storage box, 5-Carbonization mechanism, 6-Carbon injection mechanism, 7-Avoidance groove, 8-Rotary tillage assembly, 9-Motor 1, 10-Drive pulley, 11-Belt, 12-Baffle, 13-Shaft, 14-Blade, 15-Driven pulley, 16-Carbonization cylinder, 17-Motor 2, 18-Drive shaft, 19-Spiral blade, 20-Jacket, 21-Exhaust port, 22-Burner, 23-Support rod, 24-Pulverizing cylinder, 25-Motor 3, 26-Conduit, 27-Rectangular diverter box, 28-Gear, 29-Electric push rod, 30-Lifting plate, 31-Convex plate, 32- Mounting base, 33-Motor 4, 34-Disc, 35-Connecting rod, 36-Linkage bar, 37-Protrusion 1, 38-Protrusion 2, 39-Motor 5, 40-Discharge pipe, 41-Mounting shaft, 42-Auger blade, 43-Hollow rod, 44-Hollow column, 45-Air inlet, 46-Blow pipe, 47-Guide pipe, 48-Bellboard, 49-Protrusion, 50-Through groove, 51-Conical head, 52-Storage chamber, 53-Linkage shaft, 54-Annular groove, 55-Columnar isolation cover, 56-Lifting ring, 57-Spring, 58-Piston, 59-Function hopper, 61-Hollow disc, 62-Discharge disc, 63-Material trough, 64-Pipeline. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-3 In this embodiment of the invention, an integrated carbon sequestration device for straw carbonization and returning to the field includes: Top plate 1, with a traction frame 2 fixedly installed at the front end of top plate 1, a clearance groove 7 opened on the top surface of top plate 1, and a storage box 4 provided on the top surface of top plate 1. A carbonization mechanism 5 is fixedly installed on the top surface of the top plate 1; The carbon injection mechanism 6, fixedly installed at the bottom of the top plate 1, includes a lifting mechanism, a drive assembly, and multiple sets of carbon injection components. The multiple sets of carbon injection components are fixedly connected to the lifting mechanism through a through-type connection, and the multiple sets of carbon injection components are connected to the drive assembly through a transmission connection. The carbon injection component includes a feeding structure, which is connected to the carbonization mechanism 5 through a through-type connection. A pulse-type auxiliary feeding component, which is transmitted and fixedly installed at the top of the feeding structure, is fixedly installed through a through-type connection. The lifting mechanism is used to drive the multiple sets of carbon injection components to perform an overall lifting movement, and the drive assembly is used to drive the feeding structure to drive the pulse-type auxiliary feeding component to perform a pulse feeding action. The rotary tillage mechanism 3 is fixedly installed at the bottom of the top plate 1. The rotary tillage mechanism 3 includes two sets of rotary tillage components 8 respectively arranged on both sides of the carbon injection mechanism 6 and a drive mechanism for driving the two sets of rotary tillage components 8. The two sets of rotary tillage components 8 are used for loosening soil and mixing, respectively.

[0022] The main body of the device is connected to the tractor via the traction frame 2. The tractor drives the device to move in the field. During the movement, the rotary tillage component 8 located in front of the carbon injection mechanism 6 first performs rotary tillage and loosening of the soil, breaking up the compacted soil and providing a loose soil environment for subsequent carbon injection, allowing the carbon material to better contact the soil and improving the problem of poor integration between traditional surface carbon distribution and soil. Then, the lifting mechanism drives multiple sets of carbon injection components to reciprocate and insert into the loosened soil. At the same time, the carbonization mechanism 5 completes the carbonization of the straw and introduces the biochar into multiple sets of carbon injection components, so as to achieve precise delivery of biochar within a specified depth range in the soil, replacing the traditional surface carbon distribution method and solving the problem of surface carbon accumulation. Finally, the rotary tillage component 8 located behind the carbon injection mechanism 6 performs secondary rotary tillage to mix the injected biochar with the soil, allowing the biochar to fully integrate with the soil.

[0023] The pulse-type feeding method of the carbon injection component allows the carbon material to enter the soil in a dispersed spray form, which not only improves the uniformity of carbon material distribution in the soil, but also effectively prevents carbon material from accumulating and clogging in the feeding structure, ensuring the stability of the operation.

[0024] This invention realizes integrated field operations of straw carbonization, soil loosening, deep carbon injection, and carbon-soil mixing, eliminating the cumbersome process of separate carbonization, carbon distribution, and rotary tillage in traditional technologies, and improving the efficiency of straw return to the field; by loosening the soil, deep carbon injection, and mixing, it replaces the traditional surface carbon distribution mode and solves the problem of uneven distribution.

[0025] Example 2: Please refer to Figure 1 , Figure 2 and Figures 7-14 Based on Embodiment 1, the lifting mechanism includes a lifting plate 30 located directly below the clearance groove 7. Electric push rods 29 are fixedly installed at both ends of the top surface of the lifting plate 30. The telescopic part of the electric push rod 29 slides through the top plate 1, and the fixed part of the electric push rod 29 is fixedly installed on the top surface of the top plate 1.

[0026] Multiple sets of carbon injection components are arrayed along the length of the lifting plate 30. The feeding structure of the carbon injection components includes a hollow rod 43 that is fixedly connected to the lifting plate 30. A through groove 50 is provided in the upper part of the hollow rod 43. A storage cavity 52 located below the through groove 50 is provided in the side wall of the hollow rod 43. An annular groove 54 communicating with the interior of the hollow rod 43 is provided at the bottom of the storage cavity 52. A cone head 51 is slidably installed in the hollow rod 43. A linkage shaft 53 is fixedly connected to the top of the cone head 51. A protrusion 49 is fixedly connected to the periphery of the linkage shaft 53. The end of the protrusion 49 away from the linkage shaft 53 slides through the hollow rod 43 through the through groove 50 to the outside of the hollow rod 43 and is fixedly connected to the drive assembly. A bellows 48 is fixedly connected to the storage chamber 52 near the top. A guide pipe 47 is fixedly connected to the end of the bellows 48 away from the hollow rod 43. The end of the guide pipe 47 away from the bellows 48 is connected to the carbonization mechanism 5. When the protrusion 49 is located at the bottom of the through groove 50, the tapered part of the cone 51 is located outside the hollow rod 43, and the outer periphery of the cone 51 blocks the annular groove 54. When the protrusion 49 is located near the top of the through groove 50, the tapered part of the cone 51 is aligned with the annular groove 54, and the annular groove 54 is in the open state.

[0027] The pulse-type auxiliary feeding assembly includes a hollow column 44 fixedly installed at the top of the hollow rod 43, a coaxial cylindrical isolation cover 55 fixedly installed on the inner bottom surface of the hollow column 44, a gap between the cylindrical isolation cover 55 and the inner top surface of the hollow column 44, a piston 58 slidably installed in the cylindrical isolation cover 55, and a fixed connection between the bottom surface of the piston 58 and the top of the linkage shaft 53. A lifting ring 56 is slidably sleeved on the periphery of the cylindrical isolation cover 55. The periphery of the lifting ring 56 is slidably connected to the inner wall of the hollow column 44. A plurality of circumferentially arrayed springs 57 are fixedly connected between the bottom surface of the lifting ring 56 and the inner bottom surface of the hollow column 44. The top surface of the hollow column 44 is provided with an air inlet 45, and a one-way valve that only allows air to enter is provided in the air inlet 45. A blowpipe 46 is fixedly connected to the center of the outer periphery of the hollow column 44, and the other end of the blowpipe 46 is fixedly connected to the guide pipe 47.

[0028] The drive assembly includes a protruding plate 31 fixedly installed in the middle of the side of the lifting plate 30. A mounting base 32 is fixedly installed on the top surface of the protruding plate 31. A motor 33 is fixedly installed on the side of the mounting base 32. The output shaft of the motor 33 rotates through the mounting base 32 and is fixedly installed on a disc 34. A protruding post 37 is fixedly installed on the side of the disc 34 near the outer edge. A connecting rod 35 is rotatably installed around the protruding post 37. A protruding post 38 is rotatably installed on the other end of the connecting rod 35. A horizontally arranged linkage bar 36 is fixedly connected to the end of the protruding post 38 away from the connecting rod 35. The side of the linkage bar 36 away from the protruding post 38 is fixedly connected to the end of a plurality of protrusions 49 away from the linkage shaft 53.

[0029] Based on Example 1, the lifting mechanism synchronously controls two electric push rods 29 to reciprocate and extend, and the extension speed and extension range of the electric push rods 29 can be flexibly adjusted, thereby driving the lifting plate 30 to perform adaptive lifting and lowering, and finally realizing that multiple sets of hollow rods 43 perform continuous reciprocating lifting and lowering soil insertion movements within a preset soil depth range, forming a continuous deep carbonization stroke; the reciprocating lifting and lowering movement of the lifting mechanism and the pulse feeding action of the drive component are synchronized throughout the process. In the drive component, motor four 33 drives the disc 34 to rotate, and the crank rocker mechanism composed of disc 34, protrusion one 37, connecting rod 35 and protrusion two 38 runs synchronously at high speed, driving the linkage bar 36 to perform high-frequency horizontal reciprocating motion, thereby driving multiple protrusions 49 to synchronously lift and lower at high frequency under the limiting action of the through groove 50, realizing the rapid up and down movement of the cone head 51 and the high-frequency opening and closing of the annular groove 54, and finally driving the pulse auxiliary feeding component to complete rapid and continuous pulse feeding.

[0030] Charcoal is temporarily stored in storage chamber 52 through guide pipe 47 and corrugated pipe 48. Corrugated pipe 48 can expand and contract with the lifting and lowering of hollow rod 43 to ensure smooth material guiding. When hollow rod 43 moves back and forth from shallow soil to deep soil and then from deep soil to shallow soil with the lifting mechanism, pulse feeding component always maintains high-frequency feeding action. Charcoal is continuously dispersed and sprayed into the soil through annular groove 54 under the action of airflow, so that the feeding action completely covers the entire lifting and lowering stroke of carbon injection component, realizing continuous and uniform carbon distribution in soil at different depths within the stroke range of lifting mechanism, avoiding the problem of local carbon enrichment caused by traditional single-depth carbon injection.

[0031] In this embodiment, the reciprocating depth motion of the lifting mechanism is synchronized with the rapid pulse feeding of the drive component throughout the entire process, so that the feeding action covers the entire lifting stroke of the carbon injection component, realizing full-dimensional carbon distribution in the soil within the preset depth range, solving the problem of local enrichment in single-depth carbon injection, and greatly improving the uniformity of biochar distribution in the soil. Pulse feeding uses airflow to disperse and spray the charcoal, allowing it to diffuse throughout the soil at various depths. At the same time, the airflow can purge the feed pipes and storage chambers to prevent charcoal blockage and ensure continuous and stable operation of the device.

[0032] Example 3: Please refer to Figure 3 and Figure 4 Based on Example 2, the carbonization mechanism 5 includes a burner 22 and a carbonization cylinder 16 placed horizontally above the top plate 1. A sealed feeding assembly is fixedly installed through one end of the carbonization cylinder 16, and a distributing assembly is fixedly installed through the other end of the carbonization cylinder 16. The discharge end of the distributing assembly is connected through to multiple guide pipes 47. A second motor 17 is fixedly installed at the sealed end of the carbonization cylinder 16. The output shaft of the second motor 17 rotates through the end of the carbonization cylinder 16 and is fixedly connected to a drive shaft 18 coaxial with the carbonization cylinder 16. A spiral blade 19 that slides in contact with the inside of the carbonization cylinder 16 is fixedly installed on the periphery of the drive shaft 18. The pitch of the spiral blade 19 is designed in a gradient manner, and is set to a large pitch, a medium pitch and a small pitch in sequence from the sealed end to the open end of the carbonization cylinder 16. A jacket 20 is installed around the carbonization cylinder 16. An upward-opening exhaust port 21 is provided at the upper part of the jacket 20. The burner head of the burner 22 extends to the lowest point inside the jacket 20.

[0033] Based on Example 2, the carbonization mechanism 5 adopts a jacketed heating method. The burner 22 burns and heats inside the jacket 20. The heat is evenly transferred to the wall of the carbonization cylinder 16 through the jacket 20, so as to achieve uniform heating and carbonization of the straw inside the carbonization cylinder 16. The exhaust port 21 on the jacket 20 can discharge the exhaust gas generated by combustion in a timely manner to ensure the safety of the heating process.

[0034] Straw enters the carbonization cylinder 16 through a sealed feeding assembly. Motor 17 drives the transmission shaft 18 to rotate around its own axis. The transmission shaft 18 drives the spiral blades 19 to rotate synchronously. The spiral blades 19 push the straw slowly towards the open end of the carbonization cylinder 16. The spiral blades 19 with gradient pitch process the straw in stages: the large pitch section is the pre-compression section, with a large pitch and sparse blades, which initially compresses the loose straw and removes air and moisture from the straw, preparing for subsequent low-oxygen carbonization; the medium pitch section is the pyrolysis section, with a moderate pitch and dense blades, which further compresses the straw to form a material plug, isolating air flow before and after the carbonization cylinder 16, maintaining a low-oxygen carbonization environment inside the cylinder, and ensuring the effect of straw pyrolysis and carbonization; the small pitch section is the discharge section, with a small pitch and dense blades, which directionally and uniformly pushes the fully carbonized biochar to the open end of the carbonization cylinder 16 and into the distribution assembly, ensuring that the rate of biochar discharge matches the feeding rate of the subsequent carbon injection assembly.

[0035] In this embodiment, the gradient pitch spiral blade 19 realizes the pre-compression, pyrolysis and segmented discharge of straw, and naturally forms a low-oxygen carbonization environment through the material plug; the motor-driven spiral blade 19 realizes the uniform feeding and discharge of straw, ensuring that the carbonization rate matches the subsequent carbon injection rate, so that the various operation links of the device form a linkage and improve the overall operation efficiency.

[0036] Example 4: Please refer to Figure 3 and Figures 5-7Based on embodiment 3, the material distribution assembly includes a rectangular distribution box 27 fixedly installed on the top surface of the top plate 1. Two mounting shafts 41 are rotatably installed between the two ends of the rectangular distribution box 27. Screw blades 42 are fixedly installed on the mounting shafts 41. One end of the mounting shaft 41 rotates through the end of the rectangular distribution box 27 and then a gear 28 is fixedly installed thereon. The two gears 28 mesh. A motor 39 is fixedly installed at one end of a rectangular distributor box 27 away from the gear 28. A mounting shaft 41 is rotated through the end of the rectangular distributor box 27 near the motor 39 and then fixedly connected to the output shaft end of the motor 39. A conduit 26 is fixedly installed on the top surface of the rectangular diversion box 27 near the end. A crushing cylinder 24 is fixedly installed at the top of the conduit 26, and the crushing cylinder 24 is connected to the end of the carbonization cylinder 16. A motor 25 is fixedly installed on the top surface of the crushing cylinder 24. The output shaft of the motor 25 rotates through the crushing cylinder 24 and is fixedly connected to a crushing shaft. Multiple evenly distributed crushing blades are fixedly installed around the crushing shaft. The bottom surface of the rectangular diversion box 27 is arranged with a plurality of discharge pipes 40 in an array along its length direction, the same number as the plurality of guide pipes 47. The bottom ends of the plurality of discharge pipes 40 are respectively fixedly connected to the ends of the plurality of guide pipes 47 away from the hollow rod 43.

[0037] Based on Example 3, the biochar from the discharge end of the carbonization cylinder 16 first enters the crushing cylinder 24. The motor 25 drives the crushing shaft to rotate at high speed around its own axis. The crushing shaft drives multiple crushing blades to rotate synchronously, crushing the carbonized biochar and breaking the lumpy biochar into char with uniform particle size. The char with uniform particle size is easier to integrate with the soil, while avoiding the blocky char from clogging the subsequent material guiding and feeding structures. The crushed char enters the rectangular distribution box 27 through the conduit 26. The motor 39 drives the mounting shaft 41 connected to it to rotate. The mounting shaft 41 drives another mounting shaft 41 to rotate synchronously in the opposite direction through two gears 28 meshing at its ends. The two mounting shafts 41 drive their respective auger blades 42 to rotate synchronously in the opposite direction, pushing the char in the rectangular distribution box 27 in a bidirectional circulation, so that the char is evenly distributed at the bottom of the rectangular distribution box 27. Finally, the char is evenly fed into the corresponding material guiding pipe 47 through multiple arrayed discharge pipes 40, realizing the uniform feeding of multiple sets of carbon injection components.

[0038] In this embodiment, the carbonized biochar is pulverized to ensure uniform particle size, significantly improving the integration of biochar with soil and enhancing carbon fixation and soil improvement effects, while preventing lumpy biochar from clogging the pipes. Two meshing gears 28 enable the synchronous reverse rotation of two sets of auger blades 42, achieving bidirectional uniform feeding of the biochar and ensuring consistent feed rates at the bottom of the rectangular distribution box 27's discharge pipes 40. This, in turn, keeps the feed rate of multiple carbon injection components uniform, further improving the overall uniformity of carbon distribution from the feeding stage. The feeding rate of the distribution components matches the discharge rate of the carbonization mechanism and the feeding rate of the carbon injection mechanism, ensuring the continuity of operation in each stage of the device and improving overall operational efficiency.

[0039] Example 5: Please refer to Figure 2 and Figure 15 Based on Example 4, the sealed feeding assembly includes a pipe 64 that is fixedly installed around the carbonization cylinder 16. A hollow disc 61 is provided in the middle of the pipe 64. A feeding disc 62 that slides in contact with the inner wall of the hollow disc 61 is provided in the hollow disc 61. Multiple material troughs 63 are arranged in an axial array about the axis of the hollow disc 61 around the feeding disc 62. A motor for driving the feeding disc 62 to rotate is fixedly installed at one end of the hollow disc 61. A funnel 59 is fixedly installed at the top of pipe 64.

[0040] Based on Example 4, straw is added to pipe 64 through funnel 59. A motor at one end of hollow disc 61 drives feeding disc 62 to slowly rotate around its own axis within hollow disc 61. When the feed trough 63 of feeding disc 62 rotates to align with the upper pipe 64, straw falls into the feed trough 63 for temporary storage. When feeding disc 62 continues to rotate until the feed trough 63 aligns with the lower pipe 64, the straw in the feed trough 63 falls into the lower pipe 64 and enters the carbonization cylinder 16, completing one feeding cycle. Throughout the feeding process, the outer wall of feeding disc 62 remains in sliding contact with the inner wall of hollow disc 61, ensuring a sealed state between the pipes 64 above and below hollow disc 61. This prevents external air from entering the carbonization cylinder 16 through the feed inlet, maintaining a low-oxygen carbonization environment inside the carbonization cylinder 16. The rotation speed of feeding disc 62 can be controlled by adjusting the motor speed, thereby controlling the amount of straw fed and matching the feeding rate with the carbonization rate of carbonization cylinder 16.

[0041] The sealed feeding structure completely prevents external air from entering the carbonization cylinder 16 through the sliding seal between the feeding disc 62 and the hollow disc 61, ensuring a low-oxygen carbonization environment inside the cylinder and making the straw carbonization effect more stable. The feeding amount can be flexibly controlled by adjusting the motor speed, achieving a precise match between the feeding rate and the carbonization rate, avoiding the problems of insufficient straw carbonization due to excessive feeding or idling of the equipment due to insufficient feeding.

[0042] Example 6: Please refer to Figure 1and Figure 2 Based on embodiment 1, the rotary tillage assembly 8 includes a cover 12 fixedly installed on the bottom surface of the top plate 1, a rotating shaft 13 rotatably installed between the two ends of the cover 12, and a driven pulley 15 fixedly installed at one end of the rotating shaft 13 after it rotatably passes through the end of the cover 12. Multiple evenly distributed cutting tools 14 are fixedly mounted on the periphery of the rotating shaft 13.

[0043] The drive mechanism includes a motor 9 fixedly mounted on the top surface of the top plate 1. A drive pulley 10 is fixedly mounted on the output shaft end of the motor 9. A belt 11 is installed between the drive pulley 10 and two driven pulleys 15.

[0044] The rotary tillage mechanism 3 is powered by a single motor 9. Motor 9 drives the drive pulley 10 to rotate around its own axis. The drive pulley 10, through the transmission of the belt 11, simultaneously drives two driven pulleys 15 to rotate synchronously. The driven pulleys 15 drive their respective shafts 13 to rotate in the baffle 12. The shafts 13 drive multiple blades 14 evenly distributed around the periphery to rotate synchronously at high speed, realizing rotary tillage. The blades 14 of the rotary tillage component 8 located in front of the carbon injection mechanism 6 cut and loosen the compacted soil, providing a loose soil environment for the insertion of the carbon injection component and the diffusion of the biochar. The blades 14 of the rotary tillage component 8 located behind the carbon injection mechanism 6 perform secondary cutting and mixing on the soil into which the biochar is injected, allowing the biochar to be fully mixed with the soil.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A straw carbonization and returning-to-field integrated carbon sequestration device, characterized in that, include: Top plate (1), the front end of the top plate (1) is fixedly installed with a traction frame (2), the top surface of the (1) is provided with a clearance groove (7), and the top surface of the top plate (1) is provided with a storage box (4). A carbonization mechanism (5) is fixedly installed on the top surface of the top plate (1); The carbon injection mechanism (6) is fixedly installed at the bottom of the top plate (1), including a lifting mechanism, a drive component and multiple sets of carbon injection components. The multiple sets of carbon injection components are fixedly connected to the lifting mechanism through a through-type connection, and the multiple sets of carbon injection components are connected to the drive component through a transmission connection. The carbon injection component includes a feeding structure, which is connected to the carbonization mechanism (5). The top of the feeding structure is fixedly installed with a pulse-type auxiliary feeding component that is connected to the feeding structure through a through-type connection. The lifting mechanism is used to drive the multiple sets of carbon injection components to perform an overall lifting motion, and the drive component is used to drive the feeding structure to drive the pulse-type auxiliary feeding component to perform a pulse-type feeding action. A rotary tillage mechanism (3) is fixedly installed at the bottom of the top plate (1). The rotary tillage mechanism (3) includes two sets of rotary tillage components (8) respectively arranged on both sides of the carbon injection mechanism (6) and a drive mechanism for driving the two sets of rotary tillage components (8). The two sets of rotary tillage components (8) are used for loosening soil and mixing, respectively.

2. The integrated carbon sequestration and carbon fixation device for straw carbonization and returning to the field according to claim 1, characterized in that, The lifting mechanism includes a lifting plate (30) located directly below the clearance groove (7). Electric push rods (29) are fixedly installed at both ends of the top surface of the lifting plate (30). The telescopic part of the electric push rod (29) slides through the top plate (1), and the fixed part of the electric push rod (29) is fixedly installed on the top surface of the top plate (1).

3. The integrated carbon sequestration and carbon fixation device for straw carbonization and returning to the field according to claim 2, characterized in that, Multiple sets of carbon injection components are arrayed along the length of the lifting plate (30). The feeding structure of the carbon injection components includes a hollow rod (43) that is fixedly connected to the lifting plate (30). A through groove (50) is provided in the upper part of the hollow rod (43). A storage cavity (52) located below the through groove (50) is provided in the side wall of the hollow rod (43). An annular groove (54) communicating with the interior of the hollow rod (43) is provided at the bottom end of the storage cavity (52). A cone (51) is slidably installed in the hollow rod (43). A linkage shaft (53) is fixedly connected to the top of the cone (51). A protrusion (49) is fixedly connected to the periphery of the linkage shaft (53). The end of the protrusion (49) away from the linkage shaft (53) slides through the hollow rod (43) through the through groove (50) to the outside of the hollow rod (43) and is fixedly connected to the drive assembly. The storage chamber (52) is fixedly connected to a bellows (48) near the top. A guide pipe (47) is fixedly connected to one end of the bellows (48) away from the hollow rod (43). The end of the guide pipe (47) away from the bellows (48) is connected to the carbonization mechanism (5). When the protrusion (49) is located at the bottom of the through groove (50), the tapered part of the cone (51) is located outside the hollow rod (43), and the periphery of the cone (51) blocks the annular groove (54). When the protrusion (49) is located near the top of the through groove (50), the tapered part of the cone (51) is aligned with the annular groove (54), and the annular groove (54) is in the open state.

4. The integrated carbon sequestration and carbon fixation device for straw carbonization and returning to the field according to claim 3, characterized in that, The pulse-type auxiliary feeding assembly includes a hollow column (44) fixedly installed at the top of the hollow rod (43), a coaxial cylindrical isolation cover (55) fixedly installed on the inner bottom surface of the hollow column (44), a gap between the cylindrical isolation cover (55) and the inner top surface of the hollow column (44), a piston (58) slidably installed in the cylindrical isolation cover (55), and the bottom surface of the piston (58) is fixedly connected to the top of the linkage shaft (53); The outer periphery of the cylindrical isolation cover (55) is slidably fitted with a lifting ring (56), and the outer periphery of the lifting ring (56) is slidably connected to the inner wall of the hollow column (44). A plurality of circumferentially arrayed springs (57) are fixedly connected between the bottom surface of the lifting ring (56) and the inner bottom surface of the hollow column (44). The top surface of the hollow column (44) is provided with an air inlet (45), and the air inlet (45) is provided with a one-way valve that only allows air to enter; A blowpipe (46) is fixedly connected to the middle of the periphery of the hollow column (44), and the other end of the blowpipe (46) is fixedly connected to the guide pipe (47).

5. The integrated carbon sequestration and carbon fixation device for straw carbonization and returning to the field according to claim 3, characterized in that, The drive assembly includes a protruding plate (31) fixedly installed in the middle of the side of the lifting plate (30). A mounting base (32) is fixedly installed on the top surface of the protruding plate (31). A motor (33) is fixedly installed on the side of the mounting base (32). A disc (34) is fixedly installed after the output shaft of the motor (33) rotates through the mounting base (32). A protruding post (37) is fixedly installed on the side of the disc (34) near the outer edge. A connecting rod (35) is rotatably installed around the protruding post (37). A protruding post (38) is rotatably installed at the other end of the connecting rod (35). A horizontally arranged linkage bar (36) is fixedly connected to the end of the linkage bar (36) away from the protruding post (38). The side of the linkage bar (36) away from the protruding post (38) is fixedly connected to the end of a plurality of protrusions (49) away from the linkage shaft (53).

6. The integrated carbon sequestration and carbon fixation device for straw carbonization and returning to the field according to claim 3, characterized in that, The carbonization mechanism (5) includes a burner (22) and a carbonization cylinder (16) placed horizontally above the top plate (1). A sealed feeding assembly is fixedly installed at one end of the carbonization cylinder (16), and a distributing assembly is fixedly installed at the other end of the carbonization cylinder (16). The discharge end of the distributing assembly is connected to multiple guide pipes (47). The sealing end of the carbonization cylinder (16) is fixedly installed with a second motor (17). The output shaft of the second motor (17) rotates through the end of the carbonization cylinder (16) and is then fixedly connected to a transmission shaft (18) coaxial with the carbonization cylinder (16). The outer periphery of the transmission shaft (18) is fixedly installed with a spiral blade (19) that slides in contact with the inside of the carbonization cylinder (16). The pitch of the spiral blade (19) is designed in a gradient manner, and is set to a large pitch, a medium pitch and a small pitch in sequence from the sealing end to the open end of the carbonization cylinder (16). The carbonization cylinder (16) is fitted with a jacket (20) on its periphery. The jacket (20) has an upward-facing exhaust port (21) at the upper part of its periphery. The burner head (22) extends to the lowest point inside the jacket (20).

7. The integrated carbon sequestration and carbon fixation device for straw carbonization and returning to the field according to claim 6, characterized in that, The material distribution assembly includes a rectangular distribution box (27) fixedly installed on the top surface of the top plate (1). Two mounting shafts (41) are rotatably installed between the two ends of the rectangular distribution box (27). Screw blades (42) are fixedly installed on the mounting shafts (41). A gear (28) is fixedly installed after one end of the mounting shaft (41) rotates through the end of the rectangular distribution box (27). The two gears (28) mesh. The rectangular splitter box (27) is fixedly mounted with a motor five (39) at one end away from the gear (28). A mounting shaft (41) is rotated through the end of the rectangular splitter box (27) and then fixedly connected to the output shaft end of the motor five (39). The top surface of the rectangular diversion box (27) is fixedly installed with a guide tube (26) near the end. A crushing cylinder (24) is fixedly installed at the top of the guide tube (26). The crushing cylinder (24) is connected to the end of the carbonization cylinder (16). The top surface of the crushing cylinder (24) is fixedly installed with a motor three (25). The output shaft of the motor three (25) rotates through the crushing cylinder (24) and is fixedly connected to a crushing shaft. Multiple uniformly distributed crushing blades are fixedly installed around the crushing shaft. The bottom surface of the rectangular diversion box (27) is arranged with a plurality of discharge pipes (40) in an array along its length direction, which are equal in number to the plurality of guide pipes (47). The bottom ends of the plurality of discharge pipes (40) are respectively fixedly connected to the end of the plurality of guide pipes (47) away from the hollow rod (43).

8. The integrated carbon sequestration and carbon fixation device for straw carbonization and returning to the field according to claim 6, characterized in that, The sealed feeding assembly includes a pipe (64) that is fixedly installed in a through manner around the carbonization cylinder (16). A hollow disc (61) is provided in the middle of the pipe (64). A feeding disc (62) is provided in the hollow disc (61) and slides in contact with the inner wall of the hollow disc (61). Multiple material troughs (63) are arranged in an axial array about the axis of the hollow disc (61) around the periphery of the feeding disc (62). A motor for driving the feeding disc (62) to rotate is fixedly installed at one end of the hollow disc (61). A funnel (59) is fixedly installed at the top of the pipe (64).

9. The integrated carbon sequestration and carbon fixation device for straw carbonization and returning to the field according to claim 1, characterized in that, The rotary tillage assembly (8) includes a cover (12) fixedly installed on the bottom surface of the top plate (1). A rotating shaft (13) is rotatably installed between the two ends of the cover (12). One end of the rotating shaft (13) rotates through the end of the cover (12) and is fixedly installed with a driven pulley (15). Multiple evenly distributed cutting tools (14) are fixedly installed on the periphery of the rotating shaft (13).

10. The integrated carbon sequestration and carbon fixation device for straw carbonization and returning to the field according to claim 9, characterized in that, The drive mechanism includes a motor (9) fixedly installed on the top surface of the top plate (1). The output shaft of the motor (9) is fixedly installed with a drive pulley (10). A belt (11) is installed between the drive pulley (10) and the two driven pulleys (15).

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