Microbial agent fertilizer coating equipment and coating process thereof

Abstract

The application discloses a kind of microbial inoculant fertilizer coating equipment and its coating process, specifically relates to fertilizer production technical field, including processing tower, be set in the spray cabinet of processing tower side, the upper portion of the processing tower inner cavity is provided with the pretreatment structure of receiving fertilizer particles, the middle part of the processing tower inner cavity is provided with the material coating structure for coating treatment to fertilizer particles, the lower side of the processing tower inner cavity is fixedly connected with a plurality of flow guide layer plates distributed in array.The application is matched by pretreatment structure and material coating structure, pretreatment structure can be dispersed, broken and agglomerated to the received fertilizer particles, can prevent initial accumulation and broken agglomerated particles, lay a good foundation for subsequent coating treatment;Material coating structure can realize the full contact of fertilizer particles and coating treatment liquid to complete coating, its flow guide groove is convenient for particle gathering to prevent scattering, processing cavity can let particle gradually move down to ensure coating effect.

Description

Technical Field

[0001] This invention relates to the field of fertilizer production technology, and in particular to a microbial agent fertilizer coating equipment and its coating process. Background Technology

[0002] The field of fertilizer production technology encompasses the entire process of fertilizer production, from raw material processing to finished product preparation. Its core components include raw material pretreatment, mixing, granulation, coating, and quality control technologies during production. This technology focuses on meeting the diverse fertilizer needs of agricultural production. It aims to improve nutrient retention and effectiveness through optimized production processes, while also enhancing the efficiency and stability of fertilizer production by improving equipment. For example, for specialized fertilizers like microbial inoculants, specific technical challenges need to be addressed, such as protecting microbial activity during production and ensuring the uniformity of the coating layer after granulation, to guarantee that the final product meets agricultural application requirements.

[0003] Among them, a microbial inoculant fertilizer coating equipment and its coating process refers to a special equipment and supporting processing flow used for coating microbial inoculant fertilizer granules. This equipment typically includes a feeding mechanism, a coating mechanism, a conveying mechanism, and a temperature control mechanism. The feeding mechanism is used to separately convey microbial inoculant fertilizer granules and coating materials. The coating mechanism is equipped with a stirring component and a spray nozzle component. The stirring component drives the fertilizer granules to rotate to achieve uniform contact, and the spray nozzle component is used to spray the coating liquid onto the surface of the fertilizer granules in a metered manner. The conveying mechanism uses a conveyor belt structure to transport the fertilizer granules to be coated to the coating mechanism and to transport the coated fertilizer granules to subsequent stages. The temperature control mechanism is used to monitor and regulate the temperature inside the coating mechanism. Its coating process mainly includes a pretreatment step, a coating step, and a conveying step. The pretreatment step is to screen the microbial inoculant fertilizer granules to remove impurities and unqualified granules. The coating step is to send the screened fertilizer granules into the coating mechanism. The feeding mechanism controls the supply of coating materials. The spray nozzle component sprays the coating liquid while the stirring component is activated. The temperature control mechanism maintains a stable coating environment temperature. The conveying step is to transfer the fertilizer granules from each stage through a conveyor belt.

[0004] Existing pretreatment techniques only screen and remove impurities and substandard particles from microbial fertilizer granules, without dispersing or breaking up agglomerates. In practice, granules tend to initially accumulate, and agglomerated granules cannot be processed, affecting subsequent coating treatment. During the coating process, there are no guide channels to guide the granules to converge, making them prone to scattering. There are no staggered guide plates to extend the granule's falling path, resulting in insufficient granule solidification time and easy occurrence of coating cracking and agent inactivation. There is no maintenance platform for convenient maintenance of components, no guardrails to ensure maintenance safety, no dedicated scraper for conveying and distributing granules, no leak-proof structure for conveying coating liquid, and no anti-agglomeration design for material turning, leading to low coating efficiency and quality uniformity. Summary of the Invention

[0005] The main objective of this invention is to provide a microbial inoculant fertilizer coating device and its coating process, which can effectively solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A microbial inoculant fertilizer coating device includes a treatment tower, a maintenance platform disposed on the upper part of the outer surface of the treatment tower, a guardrail disposed on the upper part of the maintenance platform, and a spray cabinet disposed on one side of the treatment tower. The upper part of the inner cavity of the treatment tower is provided with a pretreatment structure for receiving fertilizer particles, and the middle part of the inner cavity of the treatment tower is provided with a material coating structure for coating fertilizer particles. Several guide plates are fixedly connected in an array on the lower side of the inner cavity of the treatment tower. The several guide plates are staggered and the lowermost guide plate is connected to the discharge port of the treatment tower.

[0007] Preferably, the pretreatment structure includes a feed inlet located on one side of the treatment tower, a partition plate is fixedly installed on the upper side of the inner cavity of the treatment tower, a diversion component for dispersing fertilizer driven by a motor is provided at the upper end of the partition plate, a pretreatment component is provided in the portion of the inner cavity of the treatment tower located below the partition plate, and a drive component for driving the pretreatment component to operate is provided at the lower end of the partition plate.

[0008] Preferably, the diversion component includes a rotating wheel rotatably connected to the upper end of the partition plate. The outer surface of the rotating wheel is provided with a plurality of conical grooves communicating with its inner cavity. The bottom wall of the inner surface of the rotating wheel is provided with a feeding groove that penetrates the bottom wall of the inner cavity of the rotating wheel, the partition plate, and the drive component.

[0009] Preferably, the drive assembly includes a turntable fixedly installed at the lower end of the partition and driven to rotate by a rotating wheel. The lower end of the turntable has a corrugated groove. A cross rod is slidably connected to the middle of the inner surface of the turntable. The horizontal part of the cross rod is slidably connected to the corrugated groove. A drive ring is slidably connected to the outer surface of the turntable and installed at the lower end of the partition by a spring. The inner surface of the drive ring is fixedly connected to the horizontal part of the cross rod. A plurality of L-shaped connecting rods are fixedly connected to the outer surface of the drive ring in a ring. The plurality of L-shaped connecting rods are all fixedly connected to the pretreatment assembly. The side of the L-shaped connecting rod closest to the inner wall of the treatment tower is slidably connected to the inner wall of the treatment tower by a spring.

[0010] Preferably, the pretreatment component includes a mounting frame that is slidably connected to the inner surface of the treatment tower. A sieve plate is fixedly installed on the inner wall of the mounting frame. Several agglomerate treatment components for dispersing agglomerated fertilizer are arranged in an array on the inner wall of the mounting frame. The lower end of the mounting frame is fixedly connected to the lower end of the vertical part of several L-shaped connecting rods.

[0011] Preferably, the material processing component includes a mounting rod fixedly installed on the inner wall of the mounting frame. The lower end of the mounting rod is rotatably connected to a plurality of swing hammers arranged in an array. The front and rear ends of the swing hammers are coaxial, with their rotation shafts extending through the inner walls of adjacent mounting frames to the outer surface of the mounting frames and fixedly connected to gears. The inner wall of the processing tower is fixedly connected with racks that mesh with adjacent gears at the positions corresponding to the gears.

[0012] Preferably, the material coating structure includes a coating box installed in the middle of the inner surface of the processing tower. The upper end of the coating box has a guide groove, and a conical guide platform is provided in the middle of the guide groove. The inner cavity of the coating box has a plurality of processing chambers arranged in an array. The inner side of each of the plurality of processing chambers is rotatably connected to a coating component. The inner cavity of the coating box is rotatably connected to a central shaft that drives the plurality of coating components. The central shaft is driven by a motor installed in the inner cavity of the coating box. The bottom wall of the inner cavity of the guide groove and the bottom wall of the inner cavity of each of the plurality of processing chambers have a connecting groove. Adjacent two connecting grooves are staggered. The connecting groove at the bottommost position is connected to the lower end of the coating box. The upper end of the central shaft is symmetrically fixed with a scraper that matches the shape of the conical guide platform.

[0013] Preferably, the coating assembly includes a drive disk rotatably mounted on the inner surface of the processing chamber. The inner surface of the drive disk is fixedly connected to the outer surface of the central shaft. Spray rods communicating with the inner cavity of the drive disk are fixedly connected in a ring on the outer surface of the drive disk. A material-turning scraper that fits against the bottom wall of the processing chamber is fixedly connected in a ring on the outer surface of the drive disk. The bottom of the material-turning scraper is provided with a distribution tooth, and the distribution teeth on two adjacent material-turning scrapers are staggered on the ring path. A plurality of liquid lubricating rings communicating with the inner cavity of the central shaft are arranged in a ring on the outer surface of the central shaft. A connecting pipe communicating with the bottom liquid lubricating ring is provided in the lower part of the coating box inner cavity. The plurality of liquid lubricating rings located on the upper side are all arranged on the upper end of the adjacent drive disk and communicate with the inner cavity of the drive disk for delivering the coating agent into the inner cavity of the drive disk.

[0014] A microbial inoculant fertilizer coating process, applied to the microbial inoculant fertilizer coating equipment described in any one of the above-mentioned methods, includes the following steps: S1: Use compound fertilizer granules or well-rotted organic fertilizer granules with a moisture content ≤15% and a particle size of 1-3mm. The storage environment temperature should be controlled between 15℃ and 25℃ to prevent the granules from absorbing moisture and clumping. Use Bacillus subtilis, Bacillus licheniformis, or phosphorus and potassium solubilizing bacteria with an effective viable count ≥10. 8 -10 10CFU / g; The coating agent is prepared at a ratio of 2%-5% of the dry weight of the fertilizer granules. The coating agent consists of 2%-4% sodium carboxymethyl cellulose as a carrier, 1%-2% sodium alginate, 1%-2% citric acid solution as a pH adjuster, and 10%-15% microbial agent. The proportions of each material are percentages of the total mass of the coating agent. First, the carrier is dissolved in deionized water at 20℃-30℃ and stirred at 300-500r / min for 15-20min until completely dissolved. After adding the microbial agent, the stirring speed is adjusted to 200-300r / min and stirred for 10-15min. Then, the pH is adjusted to 6.5-7.5 with citric acid solution to prepare the coating treatment solution. The solution is stored in a spray cabinet and kept at 20℃-30℃. S2: Turn on the drive motor of the pretreatment structure, adjust the speed of the rotating wheel of the diversion component to 750-1600 r / min, and drive the drive ring of the drive component to drive the screening frequency of the mounting frame to 1500-3200 times / min; feed fertilizer granules into the treatment tower through the feed inlet, and control the feeding rate to 100-200 kg / h. After the granules are dispersed by the conical groove of the rotating wheel, they fall into the screen plate from the discharge chute; during the screening process of the screen plate, the mounting frame drives the agglomeration treatment component to move, and the gear and rack mesh to drive the swing hammer to swing synchronously, breaking up agglomerates with a particle size >5mm. The pretreatment lasts for 5-10 minutes, and the temperature of the treatment area is maintained at 20℃-28℃. After ensuring that the particles are evenly dispersed (particle size uniformity ≥90%), they fall into the guide chute of the material coating structure. S3: Start the central shaft drive motor of the material coating structure and adjust the speed to 80-150 r / min. Drive the scraper to evenly distribute the particles in the guide channel to each processing chamber. Turn on the spray cabinet delivery pump. The coating treatment liquid enters the drive disc through the connecting pipe and liquid slip ring. It is sprayed through the spray rod at a spray rate of 10-30 L / h (matching the feed rate). The drive disc rotates with the central shaft, driving the turning scraper (speed 80-150 r / min) to turn the particles. The distribution teeth prevent accumulation and ensure full contact between liquid and material. The coating lasts for 15-25 minutes. The temperature of the processing chamber is controlled at 20℃-30℃. The particles gradually move down through the staggered connecting channels, completing 3-4 stages of coating (5-8 minutes per stage), and finally fall into the guide plate. S4: The particles fall along the staggered guide plates and solidify for 20-30 minutes. The temperature in the lower area of ​​the treatment tower is 25℃-35℃, and the relative humidity is 40%-60% to prevent the coating from cracking and the inactivation of the microbial agent. After the particles are discharged from the outlet, they are naturally cooled to 20℃-25℃ and sieved with a 1-4mm sieve to ensure that the proportion of unqualified particles (particle size <1mm or >4mm) is ≤5%. Qualified products are sealed in polyethylene inner film + kraft paper outer bag and stored in a cool, dry environment at 15℃-25℃ for ≤6 months, ensuring that the microbial agent content is ≥10%. 7 -10 9CFU / g.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention combines a pretreatment structure with a material coating structure. The pretreatment structure disperses and breaks up agglomerates of the received fertilizer particles, preventing initial particle accumulation and breaking up agglomerates, thus laying a good foundation for subsequent coating treatment. The material coating structure ensures full contact between the fertilizer particles and the coating liquid, completing the coating process. Its guide channel facilitates particle aggregation and prevents scattering, while the treatment chamber allows particles to gradually move downwards to ensure coating effectiveness. Simultaneously, the staggered guide plates extend the particle falling path, providing sufficient solidification time to prevent coating cracking and bacterial agent inactivation. The maintenance platform facilitates maintenance of the upper components of the treatment tower, and the guardrail ensures the safety of maintenance personnel.

[0016] 2. This invention utilizes the coordinated substructures of the pretreatment structure. The feed inlet allows fertilizer granules to smoothly enter the diversion component. A partition separates the diversion component from the pretreatment component to prevent granules from accumulating chaotically and affecting processing efficiency. Driven by a motor, the rotating wheel of the diversion component uses the conical groove on its outer surface to initially disperse the granules and prevent initial accumulation. The annular feeding chute evenly delivers the granules to the pretreatment component. The crossbar of the drive component rotates with the rotating wheel, driving the drive ring to reciprocate along the corrugated groove. The spring buffers the impact force, and the L-shaped connecting rod transmits power to the mounting frame. The mounting frame drives the screen plate to screen the granules. The gears of the agglomeration processing component mesh with the rack and pinion to break up the agglomerates with the swing hammer, ensuring uniform granules and laying the foundation for subsequent coating.

[0017] 3. This invention utilizes the coordinated substructures of the material coating structure. The coating box provides a closed processing space for material coating. The guide channel, in conjunction with the central conical guide platform, guides the particles to converge, preventing them from scattering. Driven by a motor, the central shaft both drives the scraper adapted to the conical guide platform to evenly distribute the particles in the guide channel to each processing chamber and drives the drive disc of the coating assembly to rotate. The connecting pipe transports the coating treatment liquid in the spray cabinet to the liquid slip ring, ensuring stable and leak-free delivery of the treatment liquid when the central shaft rotates. The drive disc drives the spray rod to spray the treatment liquid, and the turning scraper agitates the particles. The distributing teeth of the turning scraper prevent particle accumulation. The staggered connecting channels extend the residence time of particles in the processing chamber, improving the coating quality and uniformity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the processing tower of the present invention; Figure 3 This is a schematic diagram of the pretreatment structure of the present invention; Figure 4 This is a schematic diagram of the structure of the current splitter component of the present invention; Figure 5 This is a schematic diagram of the structure of the driving component of the present invention; Figure 6 This is a schematic diagram of the preprocessing component of the present invention; Figure 7 This is a schematic diagram of the material coating structure of the present invention; Figure 8 This is a cross-sectional structural diagram of the material coating structure of the present invention; Figure 9 This is a schematic diagram of the structure of the covering component of the present invention; Figure 10 This is a flow chart of the coating process of the present invention.

[0019] In the diagram: 1. Processing tower; 2. Sprayer cabinet; 3. Maintenance platform; 4. Guardrail; 5. Pre-treatment structure; 51. Feed inlet; 52. Diverting assembly; 521. Rotary wheel; 522. Conical trough; 523. Discharge chute; 53. Pre-treatment assembly; 531. Mounting frame; 532. Screen plate; 533. Agglomerate processing component; 5331. Mounting rod; 5332. Gear; 5333. Swing hammer; 5334. Rack; 54. Drive assembly; 541. Turntable; 542. Cross bar; 543. Drive ring; 544. Corrugated groove; 545. L-shaped connecting rod; 55. Partition plate; 6. Material coating structure; 61. Coating box; 62. Guide channel; 63. Processing chamber; 64. Coating assembly; 641. Drive disc; 642. Tilting scraper; 643. Spray bar; 644. Distributing teeth; 645. Hydraulic slip ring; 646. Connecting pipe; 65. Central shaft; 651. Discharge scraper; 66. Connecting channel; 7. Guide plate. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] Example 1: A microbial inoculant fertilizer coating device, see reference. Figure 1 and Figure 2The system includes a processing tower 1, a maintenance platform 3 located on the upper part of the outer surface of the processing tower 1, a guardrail 4 located on the upper end of the maintenance platform 3, a spray cabinet 2 located on one side of the processing tower 1, a pretreatment structure 5 for receiving fertilizer particles located in the upper part of the inner cavity of the processing tower 1, a material coating structure 6 for coating fertilizer particles located in the middle of the inner cavity of the processing tower 1, and several guide plates 7 arranged in an array and fixedly connected to the lower side of the inner cavity of the processing tower 1. The guide plates 7 are staggered, and the lowermost guide plate 7 is connected to the discharge port of the processing tower 1. The spray cabinet 2 is used to store the prepared coating treatment liquid. The system provides a stable storage environment for the coating treatment liquid, preventing premature deterioration that could affect the coating effect. The pretreatment structure 5 can perform pretreatment operations such as dispersion and crushing of the received fertilizer particles, laying a good foundation for subsequent coating treatment. The material coating structure 6 can achieve full contact between the fertilizer particles and the coating treatment liquid to complete the coating. The staggered flow guide plates 7 can extend the particle falling path and provide sufficient solidification time for the particles to prevent coating cracking and bacterial agent inactivation. The maintenance platform 3 facilitates the maintenance of the upper components of the treatment tower 1 by the staff, while the guardrail 4 ensures the safety of the staff during maintenance.

[0022] In the operation of this embodiment, through the cooperation of the pretreatment structure 5 and the material coating structure 6, the pretreatment structure 5 can disperse and break up the agglomerates of the received fertilizer particles, which can prevent the initial accumulation of particles and break up the agglomerates, laying a good foundation for subsequent coating treatment. The material coating structure 6 can achieve full contact between the fertilizer particles and the coating treatment liquid to complete the coating. Its guide channel 62 facilitates particle aggregation and prevents scattering. The treatment chamber 63 allows the particles to gradually move down to ensure the coating effect. At the same time, the staggered guide plates 7 extend the particle falling path and provide sufficient solidification time for the particles to prevent the coating from cracking and the inactivation of the agent. The maintenance platform 3 facilitates the maintenance of the upper components of the treatment tower 1 by the staff, and the guardrail 4 ensures the safety of the staff during maintenance.

[0023] Example 2: Based on Example 1, this example utilizes the coordination of various substructures in the pretreatment structure 5. The feed inlet 51 allows fertilizer granules to smoothly enter the diversion component 52. The partition 55 separates the diversion component 52 from the pretreatment component 53 to prevent granules from accumulating chaotically and affecting processing efficiency. The rotating wheel 521 of the diversion component 52, driven by a motor, initially disperses the granules using the conical groove 522 on its outer surface to prevent initial accumulation. The annular feed chute 523 evenly delivers the granules to the pretreatment component 53. The cross rod 542 of the drive component 54 rotates with the rotating wheel 521, driving the drive ring 543 to reciprocate along the corrugated groove 544. The spring buffers the impact force, and the L-shaped connecting rod 545 transmits power to the mounting frame 531. The mounting frame 531 drives the sieve disc 532 to sieve the granules. The gear 5332 of the agglomerate processing component 533 meshes with the rack 5334, causing the swing hammer 5333 to break up the agglomerates, ensuring uniform granules and laying the foundation for subsequent coating.

[0024] For further details, please refer to [link / reference]. Figure 3 The pretreatment structure 5 includes a feed inlet 51 located on one side of the treatment tower 1. A partition 55 is fixedly installed on the upper side of the inner cavity of the treatment tower 1. A diversion component 52 driven by a motor to disperse fertilizer is provided on the upper end of the partition 55. A pretreatment component 53 is provided on the lower part of the inner cavity of the treatment tower 1 located on the partition 55. A drive component 54 is provided on the lower end of the partition 55 to drive the operation of the pretreatment component 53. The feed inlet 51 is a channel for conveying fertilizer particles into the treatment tower 1. Its position allows the particles to enter the subsequent diversion component 52 more smoothly. The partition 55 can separate the diversion component 52 and the pretreatment component 53 to avoid the particles from accumulating chaotically between the two components and affecting the processing efficiency. The motor-driven diversion component 52 can initially disperse the incoming particles. The drive component 54 provides power for the operation of the pretreatment component 53, ensuring that the pretreatment component 53 can effectively complete the screening and agglomeration crushing of the particles.

[0025] For further details, please refer to [link / reference]. Figure 4 The diversion component 52 includes a rotating wheel 521 rotatably connected to the upper end of the partition plate 55. The outer surface of the rotating wheel 521 is provided with a plurality of conical grooves 522 that communicate with its inner cavity. The bottom wall of the inner surface of the rotating wheel 521 is provided with a feeding trough 523 that penetrates the bottom wall of the inner cavity of the rotating wheel 521, the partition plate 55, and the drive component 54. The rotating wheel 521 rotates under the drive of the motor. The conical grooves 522 on its outer surface can initially disperse the fertilizer particles entering from the feed inlet 51, prevent the particles from initially accumulating together, and allow the particles to enter the inner cavity of the rotating wheel 521 more evenly. The annularly distributed feeding trough 523 can make the particles in the inner cavity of the rotating wheel 521 fall evenly to the pretreatment component 53 below, avoiding the particles falling in a concentrated manner, which would cause too many particles in some parts of the pretreatment component 53 and affect the pretreatment effect.

[0026] For further details, please refer to [link / reference]. Figure 5 The drive assembly 54 includes a turntable 541 fixedly installed at the lower end of the partition 55 and driven to rotate by a rotating wheel 521. The lower end of the turntable 541 has a corrugated groove 544. A cross rod 542 is slidably connected to the middle of the inner surface of the turntable 541. The horizontal part of the cross rod 542 is slidably connected to the corrugated groove 544. A drive ring 543 is slidably connected to the outer surface of the turntable 541 and installed at the lower end of the partition 55 by a spring. The inner surface of the drive ring 543 is fixedly connected to the horizontal part of the cross rod 542. A plurality of L-shaped connecting rods 545 are fixedly connected to the outer surface of the drive ring 543 in a ring. The plurality of L-shaped connecting rods 545 are fixedly connected to the pretreatment assembly 53. The side of the L-shaped connecting rod 545 near the inner wall of the treatment tower 1 is slidably connected to the inner wall of the treatment tower 1 by a spring. The cross rod 542 rotates synchronously with the rotation of the rotating wheel 521. The rotating wheel 521 drives the turntable 541 to rotate. The periodic downward pressure of the corrugated groove 544 on the cross rod 542 causes the cross rod 542 and the drive ring 543 to move up and down reciprocally. The spring set on the upper side of the drive ring 543 can make the cross rod 542 always fit against the surface of the corrugated groove 544 and move along the path of the corrugated groove 544. The spring connection can buffer the impact force during the movement of the drive ring 543 and the L-shaped connecting rod 545, and prevent the components from being damaged by rigid collision. The L-shaped connecting rod 545 can transmit the movement of the drive ring 543 to the pretreatment component 53, driving the pretreatment component 53 to operate stably.

[0027] For further details, please refer to [link / reference]. Figure 5 The pretreatment component 53 includes a mounting frame 531 that is slidably connected to the inner surface of the treatment tower 1. A screen 532 is fixedly mounted on the inner wall of the mounting frame 531. Several agglomerate treatment components 533 for dispersing agglomerated fertilizer are arranged in an array on the inner wall of the mounting frame 531. The lower end of the mounting frame 531 is fixedly connected to the lower end of the vertical part of several L-shaped connecting rods 545. The mounting frame 531 slides along the inner surface of the treatment tower 1 under the drive of the L-shaped connecting rods 545. Its sliding motion can drive the screen 532 and the agglomerate treatment components 533 to move synchronously. The screen 532 can screen the particles falling from the feed chute 523 and remove some impurities or oversized particles. The agglomerate treatment components 533 can break up the agglomerated fertilizer found during the screening process. The sliding of the mounting frame 531 can ensure that the screen 532 and the agglomerate treatment components 533 can treat the particles more comprehensively and avoid some particles from entering the subsequent stages without being treated.

[0028] For further details, please refer to [link / reference]. Figure 6 The material processing component 533 includes a mounting rod 5331 fixedly installed on the inner wall of the mounting frame 531. A plurality of swing hammers 5333 are rotatably connected in an array at the lower end of the mounting rod 5331. The swing hammers 5333 are coaxial, with their rotating shafts extending through the inner walls of adjacent mounting frames 531 to the outer surface of the mounting frames 531 and fixedly connected to gears 5332. Racks 5334, meshing with adjacent gears 5332, are fixedly connected to the inner wall of the processing tower 1 at positions corresponding to the gears 5332. 331 provides mounting support for the swing hammer 5333. When the mounting frame 531 slides, it will drive the mounting rod 5331, the swing hammer 5333 and the gear 5332 to move together. During the movement, the gear 5332 meshes with the fixed rack 5334 and rotates, which in turn drives the swing hammer 5333 to rotate and swing around the mounting rod 5331. The swinging swing hammer 5333 can effectively impact the agglomerated fertilizer particles, break the agglomeration into individual uniform particles, and ensure that the particles can fully contact the coating treatment liquid during the subsequent coating treatment.

[0029] In Example 3, based on Example 2, the various substructures of the material coating structure 6 work together. The coating box 61 provides a closed processing space for material coating. The guide channel 62, in conjunction with the central conical guide platform, guides the particles to converge and prevents them from scattering. The central shaft 65, driven by a motor, both drives the scraper 651, which is adapted to the conical guide platform, to evenly distribute the particles in the guide channel 62 to each processing chamber 63, and drives the drive disk 641 of the coating component 64 to rotate. The connecting pipe 646 transports the coating treatment liquid in the spray cabinet 2 to the liquid slip ring 645, ensuring stable and leak-free delivery of the treatment liquid when the central shaft 65 rotates. The drive disk 641 drives the spray rod 643 to spray the treatment liquid, and the turning scraper 642 to stir the particles. The distributing teeth 644 of the turning scraper 642 prevent particle accumulation. The staggered connecting channels 66 extend the residence time of the particles in the processing chamber 63, improving the coating quality and uniformity.

[0030] For further details, please refer to [link / reference]. Figure 7 and Figure 8 The material coating structure 6 includes a coating box 61 installed in the middle of the inner surface of the processing tower 1. A guide channel 62 is provided at the upper end of the coating box 61, and a conical guide platform is provided in the middle of the guide channel 62. Several processing chambers 63 are arrayed within the coating box 61, and coating components 64 are rotatably connected to the inner sides of each processing chamber 63. A central shaft 65, which drives the coating components 64, is rotatably connected to the inner cavity of the coating box 61. The central shaft 65 is driven by a motor installed within the inner cavity of the coating box 61. Connecting channels 66 are provided on the bottom walls of the guide channel 62 and the bottom walls of the processing chambers 63. Adjacent connecting channels 66 are staggered, and the lowest connecting channel 66 connects to the lower end of the coating box 61. The central shaft... The upper end of the 65 is symmetrically and fixedly connected with a scraper 651 that matches the shape of the conical guide platform. The coating box 61 provides a closed processing space for material coating. The guide channel 62 is used to receive pre-treated particles. The conical guide platform in the middle can guide the particles to converge and prevent the particles from scattering to the outside of the coating box 61. The central shaft 65 rotates under the drive of the motor, which can drive both the scraper 651 and the coating component 64. The scraper 651 that matches the shape of the conical guide platform can evenly distribute the particles in the guide channel 62 to each processing chamber 63. The staggered connecting channels 66 can extend the residence time of the particles in the processing chamber 63, ensuring that the particles can undergo multi-stage coating processing and improve the coating quality.

[0031] For further details, please refer to [link / reference]. Figure 9The covering assembly 64 includes a drive disk 641 rotatably mounted on the inner surface of the processing chamber 63. The inner surface of the drive disk 641 is fixedly connected to the outer surface of the central shaft 65. Spray rods 643 communicating with the inner cavity are fixedly connected to the outer surface of the drive disk 641 in a ring. A material-turning scraper 642 that fits against the bottom wall of the inner cavity of the processing chamber 63 is fixedly connected to the outer surface of the drive disk 641 in a ring. The bottom of the material-turning scraper 642 is provided with a distribution tooth 644. The distribution teeth 644 on two adjacent material-turning scrapers 642 are staggered on the ring path. A number of liquid lubricating rings 645 communicating with the inner cavity of the central shaft 65 are arranged in an array on the outer surface of the central shaft 65. A connecting pipe 646 connecting the spray cabinet 2 and the bottom liquid lubricating rings 645 is provided in the lower part of the inner cavity of the covering box 61. The liquid lubricating rings 645 located on the upper side are all provided on the adjacent drive disks 641. The end of the tube is connected to the inner cavity of the drive disc 641 to deliver the coating agent into the inner cavity of the drive disc 641. The drive disc 641 rotates with the central shaft 65, driving the spray rod 643 and the turning scraper 642 to rotate synchronously. The connecting pipe 646 delivers the coating treatment liquid in the spray cabinet 2 to the bottom liquid slip ring 645. The liquid slip ring 645 can ensure that the coating treatment liquid is stably delivered without leakage when the central shaft 65 rotates. The treatment liquid enters the inner cavity of the drive disc 641 through the inner cavity of the central shaft 65 and the upper liquid slip ring 645, and is then evenly sprayed onto the particles by the spray rod 643. The turning scraper 642, which is in contact with the bottom wall of the inner cavity of the treatment chamber 63, can fully agitate the particles to ensure that the particles are in full contact with the treatment liquid. The distributing teeth 644 can prevent the particles from accumulating during agitation. The staggered distribution of the distributing teeth 644 on adjacent turning scrapers 642 further improves the anti-accumulation effect and ensures the uniformity of coating.

[0032] Example 4 further discloses a microbial inoculant fertilizer coating process based on Examples 1 to 3, such as... Figure 10 As shown, its application in any of the above-mentioned microbial inoculant fertilizer coating equipment includes the following steps: S1: Use compound fertilizer granules or well-rotted organic fertilizer granules with a moisture content ≤15% and a particle size of 1-3mm. The storage environment temperature should be controlled between 15℃ and 25℃ to prevent the granules from absorbing moisture and clumping. Use Bacillus subtilis, Bacillus licheniformis, or phosphorus and potassium solubilizing bacteria with an effective viable count ≥10. 8 -10 10CFU / g; The coating agent is prepared at a ratio of 2%-5% of the dry weight of the fertilizer granules. The coating agent consists of 2%-4% sodium carboxymethyl cellulose as a carrier, 1%-2% sodium alginate, 1%-2% citric acid solution as a pH adjuster, and 10%-15% microbial agent. The proportions of each material are percentages of the total mass of the coating agent. First, the carrier is dissolved in deionized water at 20℃-30℃ and stirred at 300-500r / min for 15-20min until completely dissolved. After adding the microbial agent, the stirring speed is adjusted to 200-300r / min and stirred for 10-15min. Then, the pH is adjusted to 6.5-7.5 with citric acid solution to prepare the coating treatment solution. The solution is stored in spray cabinet 2 and kept at 20℃-30℃. It should be noted that the live bacteria used in this invention are all bacterial agents rich in mature spores. After dehydration, they will enter a dormant state. When the user uses them, they will dilute them with water, at which time the bacteria will be reactivated.

[0033] S2: Turn on the drive motor of the pretreatment structure 5, adjust the speed of the wheel 521 of the diversion component 52 to 750-1600 r / min, and drive the drive ring 543 of the drive component 54 to drive the screening frequency of the mounting frame 531 to 1500-3200 times / min; feed fertilizer particles into the treatment tower 1 through the feed inlet 51, and control the feeding rate to 100-200 kg / h. After the particles are dispersed by the conical groove 522 of the wheel 521, they fall into the screen plate 532 from the discharge chute 523; during the screening process of the screen plate 532, the mounting frame 531 drives the agglomerate treatment component 533 to move, and the gear 5332 meshes with the rack 5334 to drive the swing hammer 5333 to swing synchronously, breaking up agglomerates with a particle size > 5 mm. The pretreatment lasts for 5-10 minutes, and the temperature of the treatment area is maintained at 20℃-28℃. After ensuring that the particles are evenly dispersed (particle size uniformity ≥ 90%), they fall into the guide chute 62 of the material coating structure 6. S3: Start the drive motor of the central shaft 65 of the material coating structure 6, adjust the speed to 80-150 r / min, drive the scraper 651 to evenly distribute the particles in the guide channel 62 to each processing chamber 63; turn on the delivery pump of the spray cabinet 2, the coating treatment liquid enters the drive disk 641 through the connecting pipe 646 and the liquid slip ring 645, and is sprayed through the spray rod 643 at a spray rate of 10-30 L / h (matching the feeding rate). The drive disk 641 rotates with the central shaft 65, driving the turning scraper 642 (speed 80-150 r / min) to turn the particles. The distribution teeth 644 prevent accumulation and ensure full contact between liquid and material. The coating lasts for 15-25 min, the temperature of the processing chamber 63 is controlled at 20℃-30℃, the particles gradually move down through the staggered connecting channels 66, complete 3-4 stages of coating (5-8 min per stage), and finally fall into the guide plate 7. S4: The particles fall along the staggered guide plate 7 and solidify for 20-30 minutes. The temperature in the lower area of ​​the treatment tower is 25℃-35℃, and the relative humidity is 40%-60% to prevent the coating from cracking and the inactivation of the microbial agent. After the particles are discharged from the outlet, they are naturally cooled to 20℃-25℃ and sieved with a 1-4mm sieve to ensure that the proportion of unqualified particles (particle size <1mm or >4mm) is ≤5%. Qualified products are sealed in polyethylene inner film + kraft paper outer bag and stored in a cool, dry environment at 15℃-25℃ for ≤6 months, ensuring that the microbial agent content is ≥10%. 7 -10 9 CFU / g.

[0034] 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 present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A microbial inoculant fertilizer coating device, comprising a treatment tower (1), a maintenance platform (3) disposed on the upper part of the outer surface of the treatment tower (1), a guardrail (4) disposed on the upper end of the maintenance platform (3), and a spray cabinet (2) disposed on one side of the treatment tower (1), characterized in that: The upper part of the inner cavity of the processing tower (1) is provided with a pretreatment structure (5) for receiving fertilizer particles, and the middle part of the inner cavity of the processing tower (1) is provided with a material coating structure (6) for coating fertilizer particles. Several flow guide plates (7) are fixedly connected in an array on the lower side of the inner cavity of the processing tower (1). The flow guide plates (7) are staggered and the lowest flow guide plate (7) is connected to the discharge port of the processing tower (1).

2. The microbial inoculant fertilizer coating equipment according to claim 1, characterized in that: The pretreatment structure (5) includes a feed inlet (51) located on one side of the treatment tower (1). A partition (55) is fixedly installed on the upper side of the inner cavity of the treatment tower (1). A diversion component (52) for dispersing fertilizer is provided at the upper end of the partition (55) and driven by a motor. A pretreatment component (53) is provided in the part of the inner cavity of the treatment tower (1) located below the partition (55). A drive component (54) for driving the pretreatment component (53) is provided at the lower end of the partition (55).

3. The microbial inoculant fertilizer coating equipment according to claim 2, characterized in that: The diversion assembly (52) includes a rotating wheel (521) rotatably connected to the upper end of the partition (55). The outer surface of the rotating wheel (521) is provided with a plurality of conical grooves (522) communicating with its inner cavity. The bottom wall of the inner surface of the rotating wheel (521) is provided with a feeding groove (523) that penetrates the bottom wall of the inner cavity of the rotating wheel (521), the partition (55), and the drive assembly (54).

4. The microbial inoculant fertilizer coating equipment according to claim 3, characterized in that: The drive assembly (54) includes a turntable (541) fixedly installed at the lower end of the partition (55) and driven to rotate by a rotating wheel (521). The lower end of the turntable (541) is provided with a corrugated groove (544). A cross rod (542) is slidably connected to the middle of the inner surface of the turntable (541). The horizontal part of the cross rod (542) is slidably connected to the corrugated groove (544). A drive ring (543) is slidably connected to the outer surface of the turntable (541) and installed at the lower end of the partition (55) by a spring. The inner surface of the drive ring (543) is fixedly connected to the horizontal part of the cross rod (542). A plurality of L-shaped connecting rods (545) are fixedly connected to the outer surface of the drive ring (543) in a ring. The plurality of L-shaped connecting rods (545) are all fixedly connected to the pretreatment assembly (53). The side of the L-shaped connecting rod (545) close to the inner wall of the treatment tower (1) is slidably connected to the inner wall of the treatment tower (1) by a spring.

5. The microbial inoculant fertilizer coating equipment according to claim 4, characterized in that: The pretreatment component (53) includes a mounting frame (531) that is slidably connected to the inner surface of the treatment tower (1). A sieve disc (532) is fixedly installed on the inner wall of the mounting frame (531). Several agglomerate treatment components (533) for dispersing agglomerated fertilizer are arranged in an array on the inner wall of the mounting frame (531). The lower end of the mounting frame (531) is fixedly connected to the lower end of the vertical part of several L-shaped connecting rods (545).

6. The microbial inoculant fertilizer coating equipment according to claim 5, characterized in that: The material processing component (533) includes a mounting rod (5331) fixedly installed on the inner wall of the mounting frame (531). The lower end of the mounting rod (5331) is rotatably connected to a plurality of swing hammers (5333). The swing hammers (5333) are coaxial, and their front and rear ends of the rotating shafts extend through the inner walls of adjacent mounting frames (531) to the outer surface of the mounting frames (531) and are fixedly connected to gears (5332). The inner wall of the processing tower (1) is fixedly connected to racks (5334) that mesh with adjacent gears (5332) at the positions corresponding to the gears (5332).

7. The microbial inoculant fertilizer coating equipment according to claim 1, characterized in that: The material coating structure (6) includes a coating box (61) installed in the middle of the inner surface of the processing tower (1). A guide channel (62) is provided at the upper end of the coating box (61), and a conical guide platform is provided in the middle of the guide channel (62). A plurality of processing chambers (63) are arranged in an array inside the coating box (61). A coating component (64) is rotatably connected to the inner side of each of the processing chambers (63). A central drive for driving the plurality of coating components (64) is rotatably connected to the inner cavity of the coating box (61). The central shaft (65) is driven by a motor installed in the inner cavity of the covering box (61). The bottom wall of the inner cavity of the guide channel (62) and the bottom wall of the inner cavity of several processing chambers (63) are provided with connecting grooves (66). Two adjacent connecting grooves (66) are staggered. The connecting groove (66) at the bottom is connected to the lower end of the covering box (61). The upper end of the central shaft (65) is symmetrically fixed with a scraper (651) that matches the shape of the conical guide platform.

8. The microbial inoculant fertilizer coating equipment according to claim 7, characterized in that: The covering assembly (64) includes a drive disk (641) rotatably mounted on the inner surface of the processing chamber (63). The inner surface of the drive disk (641) is fixedly connected to the outer surface of the central shaft (65). A spray bar (643) communicating with the inner cavity is fixedly connected to the outer surface of the drive disk (641) in a ring. A material-turning scraper (642) that fits against the bottom wall of the inner cavity of the processing chamber (63) is fixedly connected to the outer surface of the drive disk (641) in a ring. The bottom of the material-turning scraper (642) is provided with a material-distributing tooth (644) arranged in an array. Two adjacent pieces of the material-turning scraper (642) are arranged in a row. The material distribution teeth (644) on the material turning scraper (642) are staggered on the annular path. The outer surface of the central shaft (65) is arrayed with a number of liquid slip rings (645) that communicate with the inner cavity of the central shaft (65). The lower part of the inner cavity of the coating box (61) is provided with a connecting pipe (646) that connects the spray cabinet (2) and the bottom liquid slip rings (645). The liquid slip rings (645) located on the upper side are all set on the upper end of the adjacent drive disk (641) and communicate with the inner cavity of the drive disk (641) to deliver the coating agent into the inner cavity of the drive disk (641).

9. A microbial inoculant fertilizer coating process, applied to the microbial inoculant fertilizer coating equipment according to any one of claims 1-8, characterized in that, Includes the following steps: S1: Use compound fertilizer granules or well-rotted organic fertilizer granules with a moisture content ≤15% and a particle size of 1-3mm. The storage environment temperature should be controlled between 15℃ and 25℃ to prevent the granules from absorbing moisture and clumping. Use Bacillus subtilis, Bacillus licheniformis, or phosphorus and potassium solubilizing bacteria with an effective viable count ≥10. 8 -10 10 CFU / g; The coating agent is prepared according to the proportion of the total mass of the coating agent being 2%-5% of the dry weight of the fertilizer particles. The coating agent is composed of 2%-4% sodium carboxymethyl cellulose as a carrier, 1%-2% sodium alginate, 1%-2% citric acid solution as a pH adjuster, and 10%-15% microbial agent. The proportion of each material is the percentage of the total mass of the coating agent. First, the carrier is dissolved in deionized water at 20℃-30℃ and stirred at 300-500r / min for 15-20min until completely dissolved. After adding the microbial agent, the stirring speed is adjusted to 200-300r / min and stirred for 10-15min. Then, the pH is adjusted to 6.5-7.5 with citric acid solution to prepare the coating treatment solution. The solution is stored in the spray cabinet (2) and kept at 20℃-30℃. S2: Turn on the drive motor of the pretreatment structure (5), adjust the speed of the rotor (521) of the diversion component (52) to 750-1600 r / min, and drive the drive ring (543) of the drive component (54) to drive the screening frequency of the mounting frame (531) to 1500-3200 times / min; feed fertilizer granules into the treatment tower (1) through the feed inlet (51), and control the feed rate to 100-200 kg / h. After the granules are dispersed by the conical groove (522) of the rotor (521), they are discharged from the feed outlet. The trough (523) falls into the screen plate (532); during the screening process of the screen plate (532), the mounting frame (531) drives the agglomerate processing component (533) to move, and the gear (5332) meshes with the rack (5334) to drive the swing hammer (5333) to swing synchronously, breaking up agglomerates with a particle size >5mm. The pretreatment lasts for 5-10 minutes, and the temperature of the processing area is maintained at 20℃-28℃ to ensure that the particles are evenly dispersed (particle size uniformity ≥90%). After that, the particles fall into the guide trough (62) of the material coating structure (6). S3: Start the drive motor of the central shaft (65) of the material coating structure (6), adjust the speed to 80-150 r / min, and drive the scraper (651) to evenly distribute the particles in the guide channel (62) to each processing chamber (63); turn on the delivery pump of the spray cabinet (2), and the coating treatment liquid enters the drive plate (641) through the connecting pipe (646) and the liquid slip ring (645), and is sprayed through the spray bar (643) at a spray rate of 10-30 L / h (matching the feed rate). The drive disc (641) rotates with the central shaft (65), driving the material-turning scraper (642) (rotation speed 80-150r / min) to turn the particles. The material-distributing teeth (644) prevent accumulation and ensure full contact of liquid material. The coating lasts for 15-25 minutes. The temperature of the processing chamber (63) is controlled at 20℃-30℃. The particles gradually move down through the interlaced connecting channels (66) to complete 3-4 stages of coating (each stage 5-8 minutes) and finally fall into the guide plate (7). S4: The particles fall along the staggered guide plate (7) and solidify for 20-30 minutes. The temperature in the lower area of ​​the treatment tower (1) is 25℃-35℃ and the relative humidity is 40%-60% to prevent the coating from cracking and the bacteria from becoming inactive. After the particles are discharged from the outlet, they are naturally cooled to 20℃-25℃ and screened with a 1-4mm sieve to ensure that the proportion of unqualified particles (particle size <1mm or >4mm) is ≤5%. Qualified products are sealed in polyethylene inner film + kraft paper outer bag and stored in a cool and dry environment at 15℃-25℃ for ≤6 months to ensure that the bacteria content is ≥10%. 7 -10 9 CFU / g.

Images