A production line of special organic-inorganic compound fertilizer with high organic matter content for tobacco

Abstract

The application discloses a kind of high organic matter content special organic-inorganic compound fertilizer production line of tobacco, belongs to compound fertilizer production equipment technical field, including the mixing device, feeding device, granular forming device, dust removal cooling device and packing device that are sequentially arranged, the feeding device includes feeding groove and feeding shaft, the feeding groove one end extends to the below of mixing device discharge end and is located in mixing device, and the lower end of external feeding groove is provided with multiple equally spaced feeding ports, the spiral stirring vane is provided on the feeding shaft, and along the edge of the spiral stirring vane, riveting connection has buffer component, the buffer component includes connecting part and buffer part, the buffer part is buffer scraper, oil channel is provided in the buffer scraper, and the side of buffer scraper away from connecting part is provided with through hole corresponding to oil channel, the application effectively solves the problem that existing compound fertilizer production line spiral stirring machine conveying material reduces production efficiency.

Description

Technical Field

[0001] This invention relates to the field of compound fertilizer production equipment technology, specifically a tobacco-specific organic-inorganic compound fertilizer production line with high organic matter content. Background Technology

[0002] Compound fertilizers are chemical fertilizers containing two or more nutrients. They have advantages such as high nutrient content, fewer byproducts, and good physical properties. They play a vital role in balanced fertilization, improving fertilizer utilization, and promoting high and stable crop yields. my country is a major agricultural producer with a high demand for fertilizers. Compound fertilizers can provide crops with one or more nutrients, improve soil properties, and enhance soil fertility. The organic matter content is generally above 15%, and this organic matter can be derived from fermented and decomposed plant and animal residues such as soybean meal, oilseed cake, straw, and distiller's grains, effectively providing organic nutrients to crops. Furthermore, they contain a large amount of beneficial bacteria and inorganic fertilizers such as nitrogen, phosphorus, and potassium, which can fix nitrogen, solubilize phosphorus and potassium, promote the absorption of nitrogen, phosphorus, and potassium, and improve their absorption rate.

[0003] In the production of organic-inorganic compound fertilizers, a screw mixer can be used for mixing and feeding, followed by granulation. Existing screw mixers feed material from one end, using the screw for mixing and feeding, and then discharge from the other end, where a granulator is installed. However, the complex structure and high procurement cost of the granulator restrict the production line's efficiency.

[0004] Secondly, the gap between the agitator blades and the conveyor trough in the spiral mixer is not ideal for propulding fine powders, which can lead to poor quality of compound fertilizers. Reducing the gap between the agitator blades and the conveyor trough can cause them to come into contact, increasing wear and production noise.

[0005] Our company's high-organic-matter-content organic-inorganic compound fertilizer for tobacco is a compound fertilizer designed specifically for the unique needs of tobacco crops. Through the mixing of organic and inorganic fertilizers in a specific formula ratio, it provides comprehensive nutritional support to tobacco plants. Due to its high organic-matter content, this compound fertilizer is difficult to granulate, requiring high-performance granulators. Furthermore, the product has strict requirements for the proportions of each raw material; uneven distribution of fine powder can cause product quality issues.

[0006] Chinese patent CN106215807B discloses a granular fertilizer production line, including a crusher (1) and a conveyor belt (2) located below the discharge port (1-6) of the crusher (1). A spiral mixing feeder (3) is provided below the conveyor belt (2). The production line also includes a roller press granulator (4), an elevator (5) and a dryer (6). The feed port of the spiral mixing feeder (3) is located directly below the discharge end of the conveyor belt (2). The discharge end of the spiral mixing feeder (3) is located directly above the feed port of the roller press granulator (4). The feed end of the elevator (5) is located directly below the discharge end of the roller press granulator (4). The discharge end of the elevator (5) is connected to the feed end of the dryer (6) through a conveying pipeline. Chinese patent CN113698238A discloses an organic fertilizer production line, including a solid-liquid separation device, a fermentation turning machine, a crusher, a granulator, a mixer, a granulator, a dryer, and a packaging machine. The discharge port of the solid-liquid separation device is connected to the inlet of the fermentation turning machine via a conveying device, and an integrated fermentation machine is provided between the solid-liquid separation device and the fermentation turning machine. However, existing organic-inorganic compound fertilizer production lines fail to solve the problem that the complex structure and high procurement cost of the granulator restrict the production efficiency of the production line during the material conveying process of the spiral mixer. Secondly, there is a certain gap between the stirring blades and the conveying trough of the spiral mixer, which is not effective in promoting fine powder materials and easily leads to poor quality of compound fertilizer. Therefore, this application needs to provide a tobacco-specific organic-inorganic compound fertilizer production line with high production efficiency and high organic matter content. Summary of the Invention

[0007] The purpose of this invention is to overcome the problems in existing compound fertilizer production lines where the spiral mixer's material conveying process is constrained by the complex structure and high procurement cost of the granulator, which restricts the production efficiency of the production line. Furthermore, the gap between the spiral mixer's agitator blades and the conveying trough results in poor propulsion of fine powder, easily leading to poor quality of compound fertilizer. This invention provides a tobacco-specific organic-inorganic compound fertilizer production line with high production efficiency and high organic matter content.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a production line for a high organic matter content tobacco-specific organic-inorganic compound fertilizer, comprising a mixing device, a feeding device, a pelletizing device, a dust removal and cooling device, and a packaging device arranged sequentially. The mixing device is equipped with multiple raw material hoppers via a conveying component. The mixing device is connected to the pelletizing device via the feeding device. The discharge end of the pelletizing device is connected to the dust removal and cooling device via a conveying component. The dust removal and cooling device is connected to the packaging device via a conveying component. The feeding device includes a feeding trough and a feeding shaft. One end of the feeding trough extends below the discharge end of the mixing device and is located inside the mixing device. The lower end of the external feeding trough is open. The system has multiple equally spaced feed ports that gradually increase in size along the horizontal direction of the feed trough. A spiral stirring blade is mounted on the feed shaft, and a buffer component is riveted to the edge of the spiral stirring blade. The buffer component includes a connecting part and a buffer part, which is a buffer scraper. The buffer scraper has an oil passage, and a through hole is opened on the side of the buffer scraper away from the connecting part corresponding to the oil passage. The through hole is used to discharge the oil contained in the oil passage. As the spiral stirring blade rotates, the buffer scraper acts on the inner wall of the feed trough. The oil passage inside the buffer scraper is compressed, causing the internal oil to flow along the through hole and wet the edge of the buffer scraper, reducing the contact friction between the buffer scraper and the inner wall of the feed trough.

[0009] Furthermore, the feed port is equipped with a transmission and stirring device, which includes a feeding cylinder. The feeding cylinder is divided into a weighing zone and a stirring zone by a weighing plate. When the material in the weighing zone reaches the set value of the weighing plate, the weighing plate opens, allowing the material in the weighing zone to enter the stirring zone. The stirring zone is equipped with a stirring component, which includes a stirring shaft and stirring blades on the stirring shaft. The stirring component also includes a stirring scraper, which is connected to the stirring shaft via a connecting rod. The output end of the stirring shaft is connected to a drive component of the pellet forming device via a transmission component. The rotation of the drive component acts on the transmission component, thereby driving the output end of the stirring shaft to rotate.

[0010] Furthermore, the buffer scraper is made of silicone material, and the top of the buffer scraper's circumference, which rotates with the spiral stirring blade, is set lower than the feeding trough.

[0011] Furthermore, the through hole is tapered, and the inner wall of the through hole is provided with a liquid guiding groove, which is used to quickly and evenly wet the edge of the buffer scraper with the flowing oil.

[0012] Furthermore, the weighing plate is provided in two parts, and the weighing plate is configured to be split open. The weighing plate is equipped with an electromagnetic control valve, which is used to control the opening and closing of the weighing plate.

[0013] Furthermore, the discharge end of the raw material hopper is equipped with a material control valve, and the conveying component is equipped with an electronic belt scale at the lower end of the raw material hopper. The electronic belt scale is used to measure the conveyed material and improve the accuracy of the mixing amount.

[0014] The present invention provides a production line for a tobacco-specific organic-inorganic compound fertilizer with high organic matter content, which has the following beneficial effects: This invention provides a production line for a high-organic-matter-content organic-inorganic compound fertilizer for tobacco. Multiple equally spaced feeding ports are located at the lower end of an external feeding trough. These feeding ports gradually increase in size horizontally to improve feeding efficiency and prevent material blockage in subsequent processes, thereby increasing the production line's overall efficiency. A buffer component, made of silicone, is riveted to the edge of the spiral mixing blades. The top of the buffer scraper, which rotates with the spiral mixing blades, is positioned below the feeding trough. This design prevents wear between the spiral mixing blades and the feeding trough, extending their service life and reducing noise during production. Furthermore, it ensures that material is not ejected from the feeding trough during transport, improving its practicality. The buffer scraper has an oil channel, and a through hole is opened on the side of the buffer scraper away from the connecting part corresponding to the oil channel. When the spiral stirring blade rotates, the buffer scraper acts on the inner wall of the feeding trough. The oil channel inside the buffer scraper is squeezed and driven to wet the edge of the buffer scraper along the through hole. On the one hand, this reduces the contact friction between the buffer scraper and the inner wall of the feeding trough, and on the other hand, it improves the smoothness of material conveying. The present invention is easy to operate and highly practical. It can effectively solve the problems in the existing compound fertilizer production line where the spiral mixer conveys materials, but the complex structure of the granulator and the high purchase cost restrict the production efficiency of the production line. Secondly, there is a certain gap between the stirring blade of the spiral mixer and the conveying trough, which is not good for the propulsion effect of fine powder and easily leads to poor quality of compound fertilizer. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the tobacco-specific organic-inorganic compound fertilizer production line with high organic matter content according to the present invention.

[0016] Figure 2 This is a schematic diagram of the dust removal and cooling device used in the production line of tobacco-specific organic-inorganic compound fertilizer with high organic matter content according to the present invention.

[0017] Figure 3 This is a schematic diagram of the pellet forming device used in the production line of tobacco-specific organic-inorganic compound fertilizer with high organic matter content according to the present invention.

[0018] Figure 4 This is a schematic diagram of the extrusion roller assembly used in the production line of tobacco-specific organic-inorganic compound fertilizer with high organic matter content according to the present invention.

[0019] Figure 5This is a top view schematic diagram of the feeding device used in the production line of tobacco-specific organic-inorganic compound fertilizer with high organic matter content according to the present invention.

[0020] Figure 6 This is a schematic diagram of the feed inlet on the feed trough of the tobacco-specific organic-inorganic compound fertilizer production line with high organic matter content according to the present invention.

[0021] Figure 7 This is a cross-sectional schematic diagram of the buffer component used in the production line of tobacco-specific organic-inorganic compound fertilizer with high organic matter content according to the present invention.

[0022] Figure 8 This is a schematic diagram of the split cross-section of the buffer component used in the production line of tobacco-specific organic-inorganic compound fertilizer with high organic matter content according to the present invention.

[0023] Figure 9 This is a schematic diagram of the conveying and stirring device used in the production line of tobacco-specific organic-inorganic compound fertilizer with high organic matter content according to the present invention.

[0024] Figure 10 This is a schematic diagram showing the opening of the weighing plate of the conveying and stirring device used in the production line of tobacco-specific organic-inorganic compound fertilizer with high organic matter content according to the present invention.

[0025] In the diagram, 1. Feed trough; 2. Feed shaft; 3. Feed port; 4. Spiral mixing blade; 5. Buffer component; 51. Connecting part; 52. Buffer part; 6. Oil channel; 7. Through hole; 8. Extrusion roller assembly; 9. Extrusion plate; 10. Scraper; 11. Cooling tower; 12. Lifting component; 13. Belt conveyor; 14. Packing conveyor; 15. Blower; 16. Exhaust fan; 17. Dust removal component; 18. Discharge cylinder; 19. Weighing plate; 20. Weighing area; 21. Mixing area; 22. Mixing component. Detailed Implementation

[0026] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Example 1: This invention provides a production line for a tobacco-specific organic-inorganic compound fertilizer with high organic matter content, such as... Figure 1As shown, the device includes a mixing device, a feeding device, a pellet forming device, a dust removal and cooling device, and a packaging device arranged in sequence. The mixing device is equipped with multiple raw material hoppers via a conveying component. The discharge end of each raw material hopper is equipped with a material control valve. The conveying component is equipped with an electronic belt scale at the lower end of the raw material hopper. The electronic belt scale is used to measure the conveyed material and improve the accuracy of the mixing amount. The mixing device is connected to the pellet forming device via the feeding device. The discharge end of the pellet forming device is connected to the inlet end of the dust removal and cooling device via the conveying component. The dust removal and cooling device is connected to the packaging device via the conveying component.

[0028] like Figure 5-6 As shown, the feeding device includes a feeding trough 1 and a feeding shaft 2. One end of the feeding trough 1 extends below the discharge end of the mixing device and is located inside the mixing device. The lower end of the external feeding trough 1 has multiple equally spaced feeding ports 3. In this application, the lower end of the external feeding trough 1 has a feeding port 3 every 50-70cm. The feeding ports 3 gradually increase in size along the horizontal direction of the feeding trough 1. Through production testing and comparison, the applicant found that when this application has 5 feeding ports 3, with the ports being 3-4cm, 4-6cm, 5-7cm, 6-8cm, and 7-9cm respectively, the material discharge is smooth and does not clog. Furthermore, the feeding trough 1 at the end... There is no material accumulation at the end; when the number of feed ports 3 is greater than 5, in order to ensure that the feed ports 3 at the end can feed normally for production, the diameter of the feed ports 3 is reduced accordingly. On the one hand, the smaller diameter of the feed ports 3 at the front is prone to blockage, and on the other hand, it will reduce the production efficiency of the corresponding subsequent processes and increase its production energy consumption. When the number of feed ports 3 is less than 5, if the setting interval remains unchanged, some material will fall from the end of the feed trough 1, which will increase the cleaning labor cost. If the setting interval is increased, it can meet the production needs, but its production efficiency is reduced by more than 10% compared with the production efficiency of the feed ports 3 set in this application.

[0029] Based on the above embodiments, when the feed inlet 3 of this application is 3.5cm, 5cm, 6.5cm, 7cm and 9cm in sequence, material falls from each feed inlet and the material falls smoothly without blockage. No material falls from the end of the feed trough 1. By comparison, it can be found that the lower discharge port of the feeding device of this application has a production efficiency that is more than 15% higher than the end discharge of the traditional spiral mixer.

[0030] In the production of organic-inorganic compound fertilizers, a spiral mixer can be used for mixing and feeding, followed by granulation. Existing spiral mixers feed material from one end, using the spiral to mix and push the material, and then discharge from the other end. A granulator is installed at the discharge end. However, the granulator has a complex structure and high procurement cost, which restricts the production efficiency of the production line. Secondly, there is a certain gap between the mixing blades and the conveying trough of the spiral mixer, which is not effective in pushing fine powder materials and easily leads to poor quality of compound fertilizers. If the gap between the mixing blades and the conveying trough is reduced, the mixing blades will easily come into contact with the conveying trough, increasing wear and production noise.

[0031] The feed shaft 2 described in this application is equipped with a spiral stirring blade 4, and a buffer member 5 is riveted to the edge of the spiral stirring blade 4, such as... Figure 7-8 As shown, the connection is strengthened by riveting to prevent it from falling off due to external force during rotation. The buffer component 5 includes a connecting part 51 and a buffer part 52. The buffer part 52 is a buffer scraper and is set 1-3cm away from the inner wall of the feeding trough 1. The buffer scraper is made of silicone material. The top of the circumference of the buffer scraper is lower than the feeding trough 1 as the spiral stirring blade 4 rotates. This avoids wear between the spiral stirring blade 4 and the feeding trough 1, thereby improving the service life of the spiral stirring blade 4 and the feeding trough 1 and reducing production noise. On the other hand, it ensures that the material is not thrown out of the feeding trough 1 during the transmission process, thus improving its practical performance.

[0032] The buffer scraper has an oil channel 6 inside, and a through hole 7 is opened on the side of the buffer scraper away from the connecting part 51 corresponding to the oil channel 6. The through hole 7 is used to discharge the oil in the oil channel 6. As the spiral stirring blade 4 rotates, the buffer scraper acts on the inner wall of the feeding trough 1. The oil in the oil channel 6 inside the buffer scraper is squeezed and driven to wet the edge of the buffer scraper along the through hole 7, reducing the contact friction between the buffer scraper and the inner wall of the feeding trough 1. The discharge end of the through hole 7 is conical, and the inner wall of the through hole 7 is provided with a liquid guiding groove (not shown). The guide groove is used to quickly and evenly wet the edge of the buffer scraper with the outflowing oil. On the one hand, it reduces the friction loss between the buffer scraper and the inner wall of the feeding trough 1, and on the other hand, it improves the smoothness of material conveying and improves the transmission quality. The buffer scraper reduces the contact friction between the buffer scraper and the inner wall of the feeding trough 1, and plays a protective role for the buffer scraper and the inner wall of the feeding trough 1. The test comparison shows that the service life of the spiral mixing blade 4 of the feeding device of this application is increased by more than 10% compared with the traditional spiral mixer.

[0033] Example 2, as Figure 3-4As shown, the pellet forming device includes a housing, and an extrusion roller assembly 8 is provided inside the housing. The extrusion roller assembly 8 includes multiple roller shafts and roller bodies rotatably mounted on the roller shafts. One end of each roller shaft is connected by a connecting block, and the other end of the roller shaft passes through the housing and is fixedly connected to the housing. The connecting block has an arc-shaped opening extending outward from the center, and the arc-shaped opening is opened between the roller bodies and is inclined downward. An extrusion disc 9 is horizontally arranged below the extrusion roller assembly 8. A drive motor is provided at the upper middle part of the extrusion disc 9 through a rotating shaft. A micro vibrator is provided at the lower end of the connecting block, and the output end of the micro vibrator is connected to the rotating shaft through a vibration rod. A scraper 10 is provided at the lower end of the housing corresponding to the extrusion disc 9.

[0034] like Figure 2 As shown, the dust removal and cooling device includes a cooling tower 11, a lifting component 12, a belt conveyor 13, a baling conveyor 14, a blower 15, an exhaust fan 16, and a dust removal assembly 17. The belt conveyor 13 is horizontally positioned below the cooling tower 11. The lifting component 12 and the baling conveyor 14 are respectively connected to both ends of the belt conveyor 13. The lifting component 12 is used to return the fertilizer conveyed by the belt conveyor 13 to the feed inlet, and the baling conveyor 14 is used to transport the fertilizer conveyed by the belt conveyor 13 to a designated location for baling. A thermometer for detecting the temperature of the compound fertilizer is installed on the lifting component 12. The dust removal assembly 17 is connected to the cooling tower through multiple exhaust pipes. The dust removal assembly 17 includes a dust settling box equipped with a bag filter, a dust settling box connected to an exhaust fan 16, and an exhaust end connected to a water washing box via an exhaust pipe. The cooling tower 11 contains a cooling assembly, which includes a water-cooled pipe and a spiral guide trough. The water-cooled pipe is arranged around the spiral guide trough. The cooling tower 11 has an inlet and an outlet corresponding to the spiral guide trough. The water-cooled pipe is connected to a refrigeration box, which is connected to the water washing box via a pipe. The refrigeration box contains a water pump to circulate the cooling water in the water-cooled pipe. The upper end of the refrigeration box is connected to a blower 15 via an air inlet pipe, and the lower end of the refrigeration box is connected to the lower end of the cooling tower 11 via an air guide pipe.

[0035] After being granulated by the pellet forming device, the material in this application enters the dust removal and cooling device for cooling. This not only meets the requirements of rapid material cooling but also improves the dust removal quality. Compared with the existing dust removal and cooling devices that use drum blowing cold air for cooling, the cooling quality is improved by more than 8%, which further improves the production efficiency of the tobacco-specific organic-inorganic compound fertilizer production line with high organic matter content in this application.

[0036] Example 3: In actual production, the applicant found that the compound fertilizer produced in the next process after feeding into the feed inlet of the above-described embodiment showed significant differences in fertilizer efficacy components, with a relatively high proportion of substandard products. Therefore, based on the above-described embodiment, the feed inlet 3 of this application is also equipped with a transmission and mixing device to ensure more thorough mixing. Figure 9-10 As shown, the conveying and stirring device includes a feeding cylinder 18, which is closed at the lower end and has a discharge port. The feeding cylinder 18 is divided into a weighing zone 20 and a stirring zone 21 by a weighing plate 19. When the material in the weighing zone 20 reaches the set value of the weighing plate 19, the weighing plate 19 opens, allowing the material in the weighing zone 20 to enter the stirring zone 21. The weighing plate 19 has two plates, and the weighing plate 19 is configured as a split plate. The weighing plate 19 is equipped with an electromagnetic control valve, which is used to control the opening and closing of the weighing plate 19. The weighing plate 19 is set to a load-bearing value. When the weight exceeds the load-bearing value, the sensor on the weighing plate 19 will feed the information back to the operation controller on the production line. The operation controller will then issue a pre-set command to the solenoid control valve, thereby opening the weighing plate 19 and allowing the material to enter the lower layer. The weighing plate 19 is also set to a shut-off value. When the material on the weighing plate 19 is less than the set minimum value, the sensor on the weighing plate 19 will feed the information back to the operation controller on the production line. The operation controller will then issue a pre-set command to the solenoid control valve, thereby closing the weighing plate 19.

[0037] The mixing zone 21 is equipped with a mixing component 22, which includes a mixing shaft and mixing blades on the mixing shaft. The mixing component 22 also includes a mixing scraper, which is connected to the mixing shaft via a connecting rod. The mixing component 22 in the mixing zone 21 mixes the material entering the mixing zone 21, making the material entering the next process more thoroughly mixed. The output end of the mixing shaft is connected to the drive component of the pellet forming device via a transmission component. The rotation of the drive component acts on the transmission component, thereby driving the output end of the mixing shaft to rotate, thus reducing the need for a motor, further reducing energy consumption, and improving its economic value. The finished product test results show that the fertilizer effect is uniform, the pellets are intact, and the product qualification rate is 98.7%.

[0038] Before operating the high organic matter content tobacco-specific organic-inorganic compound fertilizer production line of this application, check whether each piece of equipment is operating normally. Then start the equipment, so that the material in the raw material hopper enters the mixing device through the conveyor belt for mixing. The mixed material enters the feeding device, and under the rotation of the spiral mixing blade 4, the material moves forward in the feeding trough 1 and enters the discharge port. It then enters the pellet forming device through the transmission mixing device. According to production needs, the distance between the scraper 10 and the lower end of the extrusion plate 9 is adjusted by the adjusting component. Then, the parameters of the drive motor and the rotation motor are set through the operation controller set by the equipment, and the drive motor is started. The motor drives the extrusion disc 9 to rotate, and the rotating motor drives the scraper 10 to rotate. The rotation direction of the scraper 10 in this application is opposite to the rotation direction of the extrusion disc 9. The mixed fine powder material is fed into the housing through the feed port via a conveyor belt. The fine powder material on the extrusion disc 9 also rotates. Since there is a gap between the extrusion roller assembly 8 and the extrusion disc 9, the roller body of the extrusion roller assembly 8 rotates around its roller axis. When the fine powder material rotates into the gap between the roller body and the extrusion disc 9, it is squeezed and forcibly fed forward. Combined with the micro vibrator, the material is forced to enter the particle forming holes on the extrusion disc 9 and be extruded. The material is then cut into granules by scraper 10. The granules then enter the dust removal and cooling device via a conveyor belt. The equipment is started after pre-setting production parameters. The material is fed into the cooling tower 11 through a pipe from the feed inlet for cooling. During the material's transport through the spiral guide chute within the cooling tower 11, the generated dust and its own dust particles are suspended in the upper middle part of the cooling tower 11 by the air duct. The exhaust fan 16 then draws the dust into the dust settling box for dust settling treatment. The treated gas is then discharged after passing through a water washing box, thereby improving the quality of the discharged gas and preventing fine particles from being released into the air. The material exiting the cooling tower 11 is conveyed by the belt conveyor 13 to the lifting component 12 for return cooling. When the material temperature detected by the thermometer is higher than the set value, the thermometer feeds the data back to the operation controller, which then issues a command to drive the belt conveyor 13 to continue rotating in the forward direction, returning the material falling from the cooling tower 11 for further cooling. When the material temperature detected by the thermometer is lower than the set value, the thermometer feeds the data back to the operation controller, which then issues a command to drive the belt conveyor 13 to rotate in the reverse direction, transferring the material to the packaging device for packaging.

[0039] This application provides a tobacco-specific organic-inorganic compound fertilizer production line with high organic matter content. By setting up a feeding device and a conveying and stirring device, the quality of material conveying and the uniformity of material mixing during the conveying process are improved, resulting in a product with uniform fertilizer effect and a high product qualification rate. This effectively solves the problems in the production process of existing compound fertilizer production lines, such as the production efficiency being restricted by the complex structure and high procurement cost of the granulator during the material conveying process of the spiral mixer, and the gap between the stirring blades and the conveying trough of the spiral mixer, which is not effective in promoting fine powder and easily leads to poor quality of compound fertilizer.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A production line for a high-organic-matter-content organic-inorganic compound fertilizer for tobacco, comprising a mixing device, a feeding device, a pelletizing device, a dust removal and cooling device, and a packaging device arranged sequentially. The mixing device is equipped with multiple raw material hoppers via a conveying component. The mixing device is connected to the pelletizing device via the feeding device. The discharge end of the pelletizing device is connected to the dust removal and cooling device via a conveying component. The dust removal and cooling device is connected to the packaging device via a conveying component. The feature is that: The feeding device includes a feeding trough and a feeding shaft. One end of the feeding trough extends below the discharge end of the mixing device and is located inside the mixing device. The lower end of the external feeding trough has multiple feeding ports that are equally spaced. The feeding ports gradually increase in size along the horizontal direction of the feeding trough. The feeding shaft is provided with a spiral stirring blade. A buffer member is riveted to the edge of the spiral stirring blade. The buffer member includes a connecting part and a buffer part. The buffer part is a buffer scraper. The buffer scraper has an oil passage inside. A through hole is opened on the side of the buffer scraper away from the connecting part corresponding to the oil passage. The through hole is used to discharge the oil in the oil passage. As the spiral stirring blade rotates, the buffer scraper acts on the inner wall of the feeding trough. The oil passage inside the buffer scraper is squeezed and driven to wet the edge of the buffer scraper along the through hole, reducing the contact friction between the buffer scraper and the inner wall of the feeding trough. The feed inlet is equipped with a transmission and stirring device, which includes a feeding cylinder. The feeding cylinder is divided into a weighing zone and a stirring zone by a weighing plate. When the material in the weighing zone reaches the set value of the weighing plate, the weighing plate opens, allowing the material in the weighing zone to enter the stirring zone. The stirring zone is equipped with a stirring component, which includes a stirring shaft and stirring blades on the stirring shaft. The stirring component also includes a stirring scraper, which is connected to the stirring shaft via a connecting rod. The output end of the stirring shaft is connected to a drive component of the pellet forming device via a transmission component. The rotation of the drive component acts on the transmission component, thereby driving the output end of the stirring shaft to rotate.

2. The tobacco-specific organic-inorganic compound fertilizer production line with high organic matter content according to claim 1, characterized in that: The buffer scraper is made of silicone material, and the top of the buffer scraper is set below the feed trough as it rotates with the spiral stirring blade.

3. The tobacco-specific organic-inorganic compound fertilizer production line with high organic matter content according to claim 1, characterized in that: The through hole is tapered, and the inner wall of the through hole is provided with a liquid guiding groove. The liquid guiding groove is used to quickly and evenly wet the edge of the buffer scraper with the flowing oil.

4. The tobacco-specific organic-inorganic compound fertilizer production line with high organic matter content according to claim 1, characterized in that: The weighing plate consists of two plates, which are arranged in a split configuration. Each weighing plate is equipped with an electromagnetic control valve, which is used to control the opening and closing of the weighing plate.

5. The tobacco-specific organic-inorganic compound fertilizer production line with high organic matter content according to claim 1, characterized in that: The discharge end of the raw material hopper is equipped with a material control valve, and the conveying component is equipped with an electronic belt scale at the lower end of the raw material hopper. The electronic belt scale is used to measure the conveyed material and improve the accuracy of the mixing amount.

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