Microbial fertilizer drying device

Abstract

This utility model discloses a microbial fertilizer drying device, including an immersion component, a drying component, and a conveying component. The immersion component consists of a first conveying group and a first tank containing immersion liquid. The first conveying group is partially immersed in the liquid and carries the microbial fertilizer. The drying component includes a second conveying group, a second tank, and a drying group. The second tank is connected to the output end of the first conveying group through a first connecting port. The drying group is located below the second conveying group to regulate the temperature inside the tank. The conveying component is connected to the output end of the second conveying group through a second connecting port. It includes a conveyor shaft with spiral blades, a double-layer discharge valve, and a storage tank. The double-layer discharge valve is located at the end of the conveyor shaft, and the storage tank is located below it. This device achieves continuous processing of microbial fertilizer through an immersion and layered drying structure, avoiding the impact of sudden temperature changes on microbial activity.

Description

Technical Field

[0001] This utility model relates to the field of microbial fertilizers, specifically to a microbial fertilizer drying device. Background Technology

[0002] Microbial fertilizer drying commonly employs a drum-mixing high-temperature drying process, where the soaked microbial fertilizer is directly immersed in a high-temperature drum for continuous tumbling and heating. Due to the rapid temperature rise and uneven hot air distribution during the drying process, there is a significant temperature difference between the surface and core layers of the microbial fertilizer particles, making the microorganisms susceptible to inactivation from the instantaneous high-temperature shock. Furthermore, traditional equipment lacks gradient temperature control, and the heating intensity of the material cannot be dynamically adjusted according to changes in moisture content, leading to accumulated heat stress damage to the microbial community and affecting the retention rate of active ingredients in the fertilizer. Utility Model Content

[0003] In view of the above problems, this utility model provides a microbial fertilizer drying device, which solves the problem of microbial inactivation caused by the sudden temperature rise and lack of gradient temperature control in traditional high-temperature drying processes.

[0004] To achieve the above objectives, this application provides a microbial fertilizer drying device, including an impregnation component, a drying component, and a conveying component. The impregnation component includes a first conveying group and a first housing. The first housing contains an impregnation liquid, and the first conveying group is partially placed in the impregnation liquid. Microbial fertilizer is placed on the first conveying group. The drying component includes a second conveying group, a second housing, and a drying group. The second housing has a first connecting port and a second connecting port. The input end of the second conveying group is connected to the output end of the first conveying group through the first connecting port. The drying group is located below the second conveying group and is used to regulate the temperature inside the second housing. The conveying component is connected to the output end of the second conveying group through the second connecting port. The conveying component includes spiral blades, a conveying shaft, a double-layer unloading valve, and a storage tank. The spiral blades are distributed circumferentially along the conveying shaft. The double-layer unloading valve is located at the other end of the conveying shaft, and the storage tank is located below the double-layer unloading valve.

[0005] In some embodiments, the first conveyor group includes a first drive unit, a first conveyor belt, and a flexible sidewall. The first conveyor belt is drivenly connected to the first drive unit. The first conveyor belt includes a first conveying section, a second conveying section, and a third conveying section connected in sequence. The first conveying section is inclined at a first angle to the inner wall of the first housing. The second conveying section is parallel to the horizontal direction. The third conveying section is inclined at a second angle to the inner wall of the first housing. The second conveying section is placed in an immersion liquid. The flexible sidewall is evenly distributed along both sides of the first conveyor belt. The flexible sidewall is configured as a water-permeable fabric-containing structure.

[0006] In some embodiments, the wetting assembly further includes a first connecting frame, a plurality of nozzles, and a first valve. The first connecting frame is disposed above the first conveying group and is mesh-shaped. A conduit is provided on the first connecting frame for communicating with the wetting liquid. The plurality of nozzles are distributed in a mesh shape on the first connecting frame and are respectively communicated with the conduit, with the nozzles facing the first conveying group. The first valve is disposed at the input end of the conduit.

[0007] In some embodiments, the immersion assembly further includes a mixing tank, a connecting pipe, and a second valve. The mixing tank is connected to a first tank and is also connected to a conduit. The mixing tank contains at least one nutrient solution and at least one microbial strain. The connecting pipe is disposed between the mixing tank and the first tank. The second valve is disposed on the connecting pipe.

[0008] In some embodiments, the second transmission group includes a fourth transmission unit, a fifth transmission unit, and a sixth transmission unit. The input end of the fourth transmission unit is connected to the output end of the first transmission group. The fifth transmission unit is disposed below the fourth transmission unit, and the input end of the fifth transmission unit is disposed below the output end of the fourth transmission unit. The sixth transmission unit is disposed below the fifth transmission unit, the input end of the sixth transmission unit is disposed below the output end of the fifth transmission unit, and the output end of the sixth transmission unit is disposed above the input end of the transmission assembly.

[0009] In some embodiments, the drying assembly includes a first drying plate, a second drying plate, and a third drying plate. The first drying plate is provided with a plurality of first heating wires and is positioned below the fourth conveying unit, and is within the vertical projection range of the fourth conveying unit. The second drying plate is provided with a plurality of second heating wires and is positioned below the fifth conveying unit, and is within the vertical projection range of the fifth conveying unit. The third drying plate is provided with a plurality of third heating wires and is positioned below the sixth conveying unit, and is within the vertical projection range of the sixth conveying unit.

[0010] In some embodiments, the drying apparatus further includes a first blocking group disposed at the first communication port. The first blocking group includes a second driving unit, a second connecting frame, and a plurality of blocking blades. The second driving unit is disposed on the inner sidewall of the second housing, and the output end of the second driving unit can move up and down relative to the first communication port. The second connecting frame is connected to the output end of the second driving unit, and the width of the second connecting frame is adapted to the width of the first communication port. The plurality of blocking blades are distributed at intervals along the extension direction of the second connecting frame, and the blocking blades are positioned above the second conveying group and do not contact the second conveying group.

[0011] In some embodiments, the blocking blade has a first side surface, a second side surface, and a first arc edge. The first side surface and the second side surface are arranged at a third angle to form a tip, which faces the first communication port. The first arc edge connects the first side surface and the second side surface and is disposed away from the first communication port.

[0012] In some embodiments, the drying assembly further includes a fan, a guide plate, and a guide tube. The fan is disposed above the second housing. The guide plate is disposed circumferentially along the second housing, and the fan is disposed in the middle of the guide plate. The guide tube is connected to the output end of the fan and is also connected to the outside.

[0013] In some embodiments, the drying apparatus further includes a first sensing group and a second sensing group. The first sensing group is disposed within a first chamber and includes a first temperature sensor, a first humidity sensor, a first concentration sensor, and a first liquid level sensor. The first temperature sensor is disposed above the first chamber, the first humidity sensor is disposed on the side wall of the first chamber, the first concentration sensor is disposed at the bottom of the first chamber, and the first liquid level sensor is disposed on the side wall of the first chamber and near the bottom of the first chamber. The second sensing group is disposed within a second chamber and includes a second temperature sensor and a second humidity sensor. The second temperature sensor is disposed above the second chamber, and the second humidity sensor is disposed on the side wall of the second chamber.

[0014] Unlike existing technologies, the above technical solution provides a microbial fertilizer drying device, including an impregnation component, a drying component, and a conveying component. The impregnation component consists of a first conveyor group and a first tank containing impregnation liquid. The first conveyor group is partially immersed in the liquid and carries the microbial fertilizer. The drying component includes a second conveyor group, a second tank, and a drying group. The second tank is connected to the output end of the first conveyor group via a first connecting port. The drying group is located below the second conveyor group to regulate the temperature inside the tank. The conveying component is connected to the output end of the second conveyor group via a second connecting port. It includes a conveyor shaft with spiral blades, a double-layer discharge valve, and a storage tank. The double-layer discharge valve is located at the end of the conveyor shaft, and the storage tank is located below it. This device achieves continuous processing of microbial fertilizer through an impregnation and layered drying structure, avoiding the impact of sudden temperature changes on microbial activity.

[0015] The above description of the utility model is merely an overview of the technical solution of this utility model. In order to enable those skilled in the art to better understand the technical solution of this utility model and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this utility model easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this utility model. Attached Figure Description

[0016] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of the present invention and other related contents, and should not be considered as limitations on the present invention.

[0017] In the accompanying drawings of the instruction manual:

[0018] Figure 1 This is a schematic diagram of the specific structure of the drying device described in the specific embodiment;

[0019] Figure 2 This is a schematic diagram of the specific structure of the first connecting frame in a specific implementation method;

[0020] Figure 3 This is a schematic diagram of the specific structure of the first blocking group in a specific implementation method;

[0021] Figure 4 This is a bottom view of the structure of the first blocking group in a specific implementation method;

[0022] Figure 5 This is a schematic diagram of the specific structure of the wetting component described in the specific embodiment;

[0023] Figure 6 This is a schematic diagram of the specific structure of the drying component and the conveying component described in a specific embodiment.

[0024] The reference numerals used in the above figures are explained as follows:

[0025] 1. Immersion component;

[0026] 11. First teleportation group;

[0027] 111. First Transmission Department;

[0028] 112. Second Transmission Department;

[0029] 113. Third Transmission Department;

[0030] 12. First box;

[0031] 13. First connecting frame;

[0032] 131. Catheter;

[0033] 14. Sprayer head;

[0034] 15. First valve;

[0035] 16. Proportioning box;

[0036] 17. Connecting pipe;

[0037] 171. Second valve;

[0038] 2. Drying components;

[0039] 21. Second teleportation group;

[0040] 211. Fourth Transmission Department;

[0041] 212. Fifth Transmission Department;

[0042] 213. The Sixth Transmission Department;

[0043] 22. Second box;

[0044] 23. Drying group;

[0045] 231. First drying plate;

[0046] 232. Second drying plate;

[0047] 233. Third drying plate; 3. Conveying assembly;

[0048] 31. Spiral blades;

[0049] 32. Conveyor shaft;

[0050] 33. Double-layer discharge valve;

[0051] 34. Storage box;

[0052] 4. First blocking group;

[0053] 41. Second drive unit;

[0054] 42. Second connecting frame;

[0055] 43. Blocking the blades;

[0056] 5. Fan;

[0057] 6. Guide plate. Detailed Implementation

[0058] To illustrate in detail the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this utility model, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this utility model and are therefore intended to limit the scope of protection of this utility model.

[0059] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0060] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0061] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0062] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0063] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0064] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0065] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0066] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0067] Please see Figures 1 to 6 This embodiment provides a microbial fertilizer drying device, including an impregnation component 1, a drying component 2, and a conveying component 3. The impregnation component 1 includes a first conveying group 11 and a first housing 12. The first housing 12 contains an impregnation liquid, and the first conveying group 11 is partially placed in the impregnation liquid. Microbial fertilizer is placed on the first conveying group 11. The drying component 2 includes a second conveying group 21, a second housing 22, and a drying group 23. The second housing 22 has a first connecting port and a second connecting port. The input end of the second conveying group 21 is connected to the first conveying group 23. The output end of the conveying group 11 is connected through the first communication port. The drying group 23 is placed below the second conveying group 21. The drying group 23 is used to regulate the temperature inside the second chamber 22. The conveying assembly 3 is connected to the output end of the second conveying group 21 through the second communication port. The conveying assembly 3 includes a spiral blade 31, a conveying shaft 32, a double-layer unloading valve 33, and a storage tank 34. The spiral blade 31 is distributed circumferentially along the conveying shaft 32. The double-layer unloading valve 33 is located at the other end of the conveying shaft 32. The storage tank 34 is located below the double-layer unloading valve 33.

[0068] In this embodiment, the first conveyor group 11 can adopt a corrosion-resistant metal mesh belt structure, which is partially immersed in the wetting liquid of the first box 12 to ensure that the bacterial fertilizer uniformly adsorbs liquid nutrients; preferably, the first box 12 is a sealed stainless steel container, and the internal wetting liquid is configured according to the characteristics of the bacterial strain to avoid pre-dehydration of microorganisms. The second conveyor group 21 can be a multi-layer hollow conveyor belt, and a guide plate can be set at the connection with the first communication port to prevent the wetting liquid from dripping into the drying area; preferably, the drying group 23 is composed of multiple sets of parallel electric heating tubes and temperature control modules, and different heating powers are set in different areas along the traveling direction of the second conveyor group 21 to form a gradient temperature field from bottom to top.

[0069] Preferably, the spiral blades 31 and the conveyor shaft 32 are integrally formed from food-grade stainless steel to ensure uniform particle propulsion after drying; the double-layer discharge valve 33 consists of gates that open and close alternately from top to bottom, achieving orderly material discharge while keeping the second box 22 sealed. Preferably, the inner wall of the storage box 34 is covered with an antibacterial coating, and a flexible connecting sleeve is provided between the top and the discharge valve.

[0070] In this embodiment, after the nutrient solution for the microbial fertilizer is adsorbed by the immersion component 1, the moistened material is transferred to the drying component 2 through the first connecting port. A gradient temperature control is achieved through the multi-layer second conveyor group 21 in conjunction with the bottom drying group 23, creating a drying environment with progressively increasing temperature. The spiral conveyor mechanism (i.e., the conveyor component 3) smoothly transports the semi-dried material to the storage tank 34 under sealed conditions. This device allows the microbial fertilizer to undergo two stages during transport: immersion and moisture retention, and gradient temperature-controlled drying, avoiding the microbial heat stress damage caused by sudden high-temperature changes in traditional processes. Furthermore, the double-layer discharge valve 33 effectively isolates external air backflow, maintaining the stability of the drying environment. The progressive conveying mode of the spiral blades 31 reduces the breakage rate of the microbial fertilizer caused by mechanical compression, achieving a high retention rate of active ingredients in the drying process.

[0071] In some embodiments, the first conveyor group 11 includes a first drive unit, a first conveyor belt, and a flexible sidewall. The first conveyor belt is connected to the first drive unit. The first conveyor belt includes a first conveyor section 111, a second conveyor section 112, and a third conveyor section 113 connected in sequence. The first conveyor section 111 is inclined at a first angle to the inner wall of the first housing 12. The second conveyor section 112 is parallel to the horizontal direction. The third conveyor section 113 is inclined at a second angle to the inner wall of the first housing 12. The second conveyor section 112 is placed in an immersion liquid. The flexible sidewall is evenly distributed along both sides of the first conveyor belt and is configured as a water-permeable fabric-containing structure.

[0072] In this embodiment, the first conveyor section 111 of the first conveyor belt is inclined at a first angle to the inner wall of the first box 12, so that the microbial fertilizer naturally slides down to the second conveyor section 112 under the action of gravity; the second conveyor section 112 is horizontally immersed in the wetting liquid to ensure that the microbial fertilizer is fully in contact with the liquid medium; the third conveyor section 113 is tilted and raised at a second angle to allow excess liquid to flow back to the box.

[0073] Preferably, the flexible sidewall adopts a composite laminate structure of polyester fiber and rubber. Its surface micropores allow liquid to permeate but prevent particle overflow, thus preventing the wetting liquid from splashing as the conveyor belt moves. The first drive unit can be a variable frequency speed-regulating motor, which adjusts the conveying speed according to the moisture content of the microbial fertilizer to match the wetting time requirements of different microbial species. Furthermore, the surface of the first conveyor belt is covered with an anti-stick coating to reduce material adhesion and residue.

[0074] This embodiment optimizes the microbial fertilizer wetting path through a three-section conveyor belt structure consisting of a first conveyor section 111, a second conveyor section 112, and a third conveyor section 113. The first conveyor section 111, as an inclined section, utilizes gravity for natural flow guidance; the second conveyor section 112, as a horizontal section, extends the wetting time; and the third conveyor section 113, as a lifting section, achieves liquid-solid separation. A permeable flexible baffle maintains the stability of the liquid level in the wetting zone. The first drive unit precisely controls the residence time of the microbial fertilizer in the liquid environment, and the anti-stick coating reduces material loss. This embodiment improves wetting uniformity while, combined with the permeation characteristics of the flexible baffle, preventing particle leakage and promoting liquid recycling, providing stable pretreatment conditions for subsequent gradient drying, and overall enhancing the retention efficiency of microbial activity.

[0075] In some embodiments, the wetting assembly 1 further includes a first connecting frame 13, a plurality of nozzles 14, and a first valve 15. The first connecting frame 13 is disposed above the first conveying group 11, the first connecting frame 13 is in a grid shape, and a conduit 131 is provided on the first connecting frame 13 for communicating with the wetting liquid. The plurality of nozzles 14 are distributed in a grid shape on the first connecting frame 13, and the plurality of nozzles 14 are respectively communicated with the conduit 131 and are disposed facing the first conveying group 11. The first valve 15 is disposed at the input end of the conduit 131.

[0076] In this embodiment, the first connecting frame 13 preferably adopts a stainless steel welded mesh structure, which is erected above the first conveying group 11. Its mesh spacing is adapted to the distribution density of the nozzles 14 to ensure that the wetting liquid covers no dead corners. The conduit 131 is embedded in the longitudinal beam of the first connecting frame 13 and can be connected to the external liquid supply system through a quick connector.

[0077] The nozzle 14 is preferably made of corrosion-resistant ceramic material, and the nozzle has a fan-shaped diffusion angle design to ensure that the liquid flow is evenly sprayed onto the surface of the first conveyor belt. The first valve 15 can be an electromagnetic flow regulating valve, which can precisely control the supply of wetting liquid by controlling the opening and closing degree of the input end of the conduit 131. Preferably, the first connecting frame 13 has anti-drip clamps at the grid intersections to prevent residual droplets from falling and contaminating the material when the machine stops. The grid arrangement of the nozzle array 14 forms a cross-coverage with the travel direction of the first conveyor belt to ensure that the surface of the microbial fertilizer is continuously replenished with liquid.

[0078] This embodiment integrates a spray system through a grid-like first connecting frame 13, forming a uniform wetting liquid curtain above the first conveyor belt. The flow supply regulated by the first valve 15 allows for simultaneous surface adsorption and deep penetration of the microbial fertilizer. The fan-shaped nozzles 14, with their coverage angle coordinated with the conveyor belt movement, achieve dynamic liquid replenishment, while the anti-drip structure maintains equipment cleanliness. This embodiment overcomes the liquid level dependence of traditional immersion wetting, allowing for adjustment of spray intensity for microbial fertilizers of different particle sizes, avoiding localized over-wetting or dryness, and ensuring a balanced distribution of microbial active substances within the carrier. Furthermore, precise valve control reduces liquid waste, and the modular layout of the grid frame facilitates maintenance and cleaning, providing a pretreatment foundation with consistent moisture content for subsequent gradient drying, thus improving the overall quality stability of the finished microbial fertilizer.

[0079] In some embodiments, the immersion assembly 1 further includes a mixing tank 16, a connecting pipe 17, and a second valve 171. The mixing tank 16 is connected to the first tank 12 and is also connected to the conduit 131. The mixing tank 16 contains at least one nutrient solution and at least one microbial strain. The connecting pipe 17 is disposed between the mixing tank 16 and the first tank 12. The second valve 171 is disposed on the connecting pipe 17.

[0080] In this embodiment, the mixing chamber 16 preferably adopts a compartmentalized stainless steel structure, with independent internal compartments for storing different nutrient solutions and bacterial suspensions, and premixing is achieved through a bottom mixer. The connecting pipe 17 is preferably a food-grade silicone corrugated pipe, whose flexible corrugated structure can buffer pressure fluctuations in the liquid delivery and prevent pipe bending and blockage. The second valve 171 can be a pneumatic proportional regulating valve, which synchronously controls the input volume of multiple component liquids according to the preset ratio to ensure the dynamic mixing accuracy of the bacterial strain and nutrient solution. Furthermore, a visual liquid level window can be provided on the side wall of the mixing chamber 16 for real-time monitoring of the remaining amount of each component. Preferably, the interface between the connecting pipe 17 and the mixing chamber 16 adopts a quick-release sealing flange for easy pipeline cleaning and maintenance.

[0081] This embodiment achieves online dynamic mixing of microbial inoculum and nutrient solution through the mixing chamber 16, while the second valve 171 precisely controls the component ratio. The flexible structure of the connecting pipe 17 ensures stable delivery of the mixture to the impregnation zone. This embodiment avoids the loss of active ingredients caused by traditional manual mixing, ensuring that the microbial carrier obtains a balanced nutrient load in the early stage of impregnation, reducing the risk of contamination by other microorganisms, and providing a pretreatment foundation for uniform distribution of active substances for subsequent gradient drying, thereby improving the overall bioefficacy and stability of the finished microbial fertilizer.

[0082] In some embodiments, the second transmission group 21 includes a fourth transmission unit 211, a fifth transmission unit 212, and a sixth transmission unit 213. The input end of the fourth transmission unit 211 is connected to the output end of the first transmission group 11. The fifth transmission unit 212 is disposed below the fourth transmission unit 211, and the input end of the fifth transmission unit 212 is located below the output end of the fourth transmission unit 211. The sixth transmission unit 213 is disposed below the fifth transmission unit 212, the input end of the sixth transmission unit 213 is located below the output end of the fifth transmission unit 212, and the output end of the sixth transmission unit 213 is located above the input end of the transmission assembly 3.

[0083] In this embodiment, preferably, the fourth conveyor section 211 uses a high-temperature resistant stainless steel mesh belt, with its output end suspended above the input end of the fifth conveyor section 212, allowing the material to slide down naturally. The mesh belt aperture of the fifth conveyor section 212 is smaller than that of the fourth conveyor section 211, intercepting smaller particles to achieve layered drying. The surface of the mesh belt of the sixth conveyor section 213 is covered with an anti-stick coating to prevent material from sticking together at the end of the drying process. Preferably, the vertical spacing between the fourth conveyor section 211, the fifth conveyor section 212, and the sixth conveyor section 213 decreases progressively, forming a stepped falling path. Combined with the temperature zone distribution of the bottom drying group 23, the microbial fertilizer undergoes different temperature control stages layer by layer. There is no mechanical pushing mechanism between the fourth conveyor section 211, the fifth conveyor section 212, and the sixth conveyor section 213; particle transfer is achieved by gravity, reducing the risk of crushing.

[0084] This embodiment extends the drying path of the microbial fertilizer in a gradient temperature field through a multi-layered stepped conveying structure. Natural sliding reduces mechanical damage, and the layered pore sizes adapt to the particle characteristics of different drying stages. An anti-stick coating ensures smooth discharge. This embodiment achieves a smooth transition of the microbial fertilizer from high to low humidity, and with layer-by-layer temperature control, avoids thermal mutation and inactivation of active ingredients, improving drying uniformity and microbial survival rate.

[0085] In some embodiments, the drying assembly 23 includes a first drying plate 231, a second drying plate 232, and a third drying plate 233. The first drying plate 231 is provided with a plurality of first heating wires and is located below the fourth conveying section 211, and is within the vertical projection range of the fourth conveying section 211. The second drying plate 232 is provided with a plurality of second heating wires and is located below the fifth conveying section 212, and is within the vertical projection range of the fifth conveying section 212. The third drying plate 233 is provided with a plurality of third heating wires and is located below the sixth conveying section 213, and is within the vertical projection range of the sixth conveying section 213.

[0086] In this embodiment, the first drying plate 231 can be made of a silicon nitride ceramic substrate, with a spiral first heating wire embedded in a groove on its surface, and the heating surface precisely covers the projection area of ​​the fourth conveying section 211; the second drying plate 232 can be a corrugated aluminum alloy plate, with the second heating wire arranged in a serpentine pattern, misaligned with the mesh of the fifth conveying section 212; the third drying plate 233 can be made of a microporous silicon carbide plate, with the third heating wire independently controlled in sections to meet the low-temperature drying requirements of the final section of the sixth conveying section 213. Each drying plate maintains a constant distance from its corresponding conveying section, forming a directional radiative heat field. The heating wire is covered with a polytetrafluoroethylene insulating layer to prevent thermal short circuits.

[0087] This embodiment achieves a gradual decrease in heat intensity during the descent of the microbial fertilizer by matching differentiated drying plates at different delivery levels. Directional radiant heating reduces heat loss, and zoned temperature control adapts to the needs of different drying stages, avoiding secondary damage to microorganisms caused by temperature rebound and ensuring the stable retention of active ingredients during the gradual drying process.

[0088] In some embodiments, the drying device further includes a first blocking group 4, which is disposed at the first communication port. The first blocking group 4 includes a second driving unit 41, a second connecting frame 42, and a plurality of blocking blades 43. The second driving unit 41 is disposed on the inner side wall of the second housing 22, and the output end of the second driving unit 41 can move up and down relative to the first communication port. The second connecting frame 42 is connected to the output end of the second driving unit 41, and the width of the second connecting frame 42 is adapted to the width of the first communication port. The plurality of blocking blades 43 are distributed at intervals along the extension direction of the second connecting frame 42, and the blocking blades 43 are placed above the second conveying group 21 and do not contact the second conveying group 21.

[0089] In this embodiment, the second connecting frame 42 can be made of lightweight aluminum alloy profile, and its width is precisely matched with the inner wall slide rail of the first connecting port to achieve vertical lifting guidance; the blocking blades 43 are arranged obliquely, and the bottom of them maintains a distance from the surface of the second conveying group 21. The second drive unit 41 preferably uses a servo electric push rod, which is connected to the second connecting frame 42 through a coupling, and can automatically adjust the height of the blocking blades 43 according to the thickness of the bacterial fertilizer layer. Preferably, the edges of the blocking blades 43 are passivated to form a slightly curved guide surface, which guides the material to spread evenly while blocking the convection of hot and humid air.

[0090] In this embodiment, adjustable tilting blocking blades 43 form a dynamic airflow barrier at the first connection port, suppressing temperature and humidity crosstalk between the first chamber 12 and the second chamber 22. The guiding surface of the blocking blades 43 simultaneously manages the distribution of microbial fertilizer on the surface of the second conveying group 21, and the adaptively lifting second drive unit 41 ensures the isolation effect under different working conditions, providing stable environmental parameter conditions for gradient drying.

[0091] In some embodiments, the blocking blade 43 has a first side surface, a second side surface, and a first arc edge. The first side surface and the second side surface are arranged at a third angle to form a tip, which faces the first communication port. The first arc edge connects the first side surface and the second side surface and is disposed away from the first communication port.

[0092] In this embodiment, the airflow guidance is optimized by using a blocking blade 43 with a pointed tip and an arc edge structure. The airflow splitting surface formed by the third angle between the first and second sides guides the hot and humid air to the side wall of the chamber, and the first arc edge promotes the laminar slow release of residual airflow. The layout with the pointed tip facing the first connection port not only blocks the diffusion of temperature and humidity but also creates a comb-like distribution effect on the surface microbial fertilizer of the second conveying group 21, avoiding the formation of local thermal resistance zones due to material accumulation. This embodiment maintains the gradient of environmental parameters inside and outside the drying chamber and reduces the impact of airflow turbulence on the microbial carrier through the laminar flow guided by the arc edge, ensuring the activity stability of the microbial community during the gradual drying process.

[0093] In some embodiments, the drying assembly 2 further includes a fan 5, a guide plate 6, and a guide tube. The fan 5 is disposed above the second housing 22. The guide plate 6 is disposed around the second housing 22. The fan 5 is disposed in the middle of the guide plate 6. The guide tube is connected to the output end of the fan 5 and is also connected to the outside.

[0094] In this embodiment, the airflow circulation path within the second drying chamber 22 is optimized through the synergistic action of the fan 5, guide plate 6, and guide pipe. The guide plate 6 forms a ring-shaped flow barrier distributed circumferentially along the second chamber 22, ensuring that the airflow output by the fan 5 is evenly dispersed to each drying area. The guide pipe directionally exhausts some of the hot and humid air outside the second chamber 22 while maintaining a stable negative pressure environment inside the chamber. This embodiment achieves both penetrating flow of hot air between the multi-layer second conveyor groups 21, accelerating moisture evaporation, and prevents the accumulation and backflow of high-temperature and high-humidity airflow at the top of the second chamber 22 through directional dehumidification, ensuring the accuracy of gradient temperature control, reducing the impact of local overheating on microbial activity, and improving drying efficiency and the retention rate of microbial fertilizer activity.

[0095] In some embodiments, the drying apparatus further includes a first sensing group and a second sensing group. The first sensing group is disposed within a first housing 12 and includes a first temperature sensor, a first humidity sensor, a first concentration sensor, and a first liquid level sensor. The first temperature sensor is disposed above the first housing 12, the first humidity sensor is disposed on the side wall of the first housing 12, the first concentration sensor is disposed at the bottom of the first housing 12, and the first liquid level sensor is disposed on the side wall of the first housing 12 and near the bottom of the first housing 12. The second sensing group is disposed within a second housing 22 and includes a second temperature sensor and a second humidity sensor. The second temperature sensor is disposed above the second housing 22, and the second humidity sensor is disposed on the side wall of the second housing 22.

[0096] In this embodiment, through multi-parameter collaborative monitoring of the first and second sensor groups, the first temperature sensor provides real-time feedback on the gas phase temperature at the top of the first chamber 12, the first humidity sensor detects the ambient humidity on the side walls, the first concentration sensor tracks changes in the composition of the bottom wetting liquid, and the first liquid level sensor ensures stable liquid level. The second temperature sensor and the second humidity sensor simultaneously collect temperature and humidity data from different areas of the drying chamber. This embodiment enables dynamic interlocking control of environmental parameters during the wetting and drying stages, ensuring that the microbial fertilizer remains within the microbial activity tolerance threshold throughout the treatment process, preventing loss of active ingredients due to abnormal liquid level or concentration deviation, and improving process control precision and finished product quality stability.

[0097] By adopting the above technical solutions, this utility model differs from the prior art and has the following beneficial effects: The above technical solutions achieve active-preserving drying treatment of microbial fertilizer through the synergistic optimization of the wetting component 1, the drying component 2, and the conveying component 3. The wetting component 1 adopts a segmented conveyor belt structure of the first conveyor section 111, the second conveyor section 112, and the third conveyor section 113, combined with the grid spraying system of the first connecting frame 13. Under the constraint of flexible baffles, it ensures that the microbial fertilizer uniformly adsorbs the nutrient solution, and the mixing box 16 dynamically mixes the microbial strains and nutrient solution, avoiding pre-dehydration and component deviation. The drying component 2 extends the drying path through the multi-layer stepped conveying structure of the second conveyor group 21. The differentiated first drying plate 231, second drying plate 232, and third drying plate 233 form a thermal field with progressively decreasing temperature. The blocking blades 43 suppress the temperature and humidity crosstalk between the first box 12 and the second box 22, and the fan 5 guide system enhances the airflow circulation efficiency. The spiral conveying mechanism and double-layer unloading valve 33 of the conveying component 3 ensure stable discharge in a closed environment and reduce mechanical damage. The first and second sensor groups monitor the composition, level, and drying temperature and humidity of the impregnation solution in real time, enabling dynamic interlocking control of process parameters. This device completes the entire process of impregnation and humidification, gradient drying, and activity protection during continuous transport, effectively reducing microbial heat stress damage and improving the bioavailability stability and quality uniformity of the finished microbial fertilizer.

[0098] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this utility model, this should not limit the scope of patent protection of this utility model. Any technical solutions resulting from equivalent structural or procedural substitutions or modifications made based on the essential concept of this utility model and utilizing the content described in the text and drawings of this utility model, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this utility model.

Claims

1. A microbial fertilizer drying device, characterized by, include: The impregnation assembly includes a first conveyor group and a first housing. The first housing contains an impregnation liquid, the first conveyor group is partially placed in the impregnation liquid, and microbial fertilizer is placed on the first conveyor group. The drying assembly includes a second conveyor group, a second housing, and a drying group. The second housing is provided with a first communication port and a second communication port. The input end of the second conveyor group is connected to the output end of the first conveyor group through the first communication port. The drying group is placed below the second conveyor group and is used to regulate the temperature inside the second housing. A conveying assembly is connected to the output end of the second conveying group through the second communication port. The conveying assembly includes spiral blades, a conveying shaft, a double-layer unloading valve, and a storage tank. The spiral blades are distributed circumferentially along the conveying shaft. The double-layer unloading valve is located at the other end of the conveying shaft, and the storage tank is located below the double-layer unloading valve.

2. The microbial bacterial fertilizer drying device according to claim 1, characterized in that, The first transmission group includes: First drive unit; A first conveyor belt is connected to the first drive unit. The first conveyor belt includes a first conveying section, a second conveying section and a third conveying section connected in sequence. The first conveying section is inclined at a first angle to the inner wall of the first box. The second conveying section is parallel to the horizontal direction. The third conveying section is inclined at a second angle to the inner wall of the first box. The second conveying section is placed in the wetting liquid. Flexible sidewalls are evenly distributed along both sides of the first conveyor belt, and the flexible sidewalls are configured as a water-permeable fabric structure.

3. The microbial bacterial fertilizer drying device according to claim 1, characterized in that, The wetting assembly further includes: A first connecting frame is disposed above the first conveying group. The first connecting frame is in the form of a grid and is provided with a conduit for communicating with the immersion liquid. Multiple nozzles are arranged in a grid on the first connecting frame, and each nozzle is connected to a conduit. The nozzles are positioned toward the first conveying group. The first valve is located at the inlet end of the conduit.

4. The microbial bacterial fertilizer drying device according to claim 3, characterized in that, The wetting assembly further includes: A mixing chamber is connected to the first chamber and is also connected to the conduit. The mixing chamber contains at least one nutrient solution and at least one microbial strain. A connecting pipe is disposed between the mixing tank and the first tank; The second valve is installed on the connecting pipe.

5. The microbial fertilizer drying device according to claim 1, characterized in that, The second transmission group includes: The fourth transmission unit, the input end of which is connected to the output end of the first transmission group; A fifth transmission unit is disposed below the fourth transmission unit, and the input end of the fifth transmission unit is positioned below the output end of the fourth transmission unit. A sixth transmission unit is disposed below the fifth transmission unit, with its input end positioned below the output end of the fifth transmission unit and its output end positioned above the input end of the transmission assembly.

6. The microbial fertilizer drying device according to claim 5, characterized in that, The drying unit includes: The first drying plate is provided with a plurality of first heating wires. The first drying plate is located below the fourth conveying part and is located within the projection range of the fourth conveying part in the vertical direction. And / or, a second drying plate, wherein a plurality of second heating wires are embedded in the second drying plate, the second drying plate is positioned below the fifth conveying section, and the second drying plate is positioned within the projection range of the fifth conveying section in the vertical direction; And / or, a third drying plate, wherein a plurality of third heating wires are embedded in the third drying plate, the third drying plate is positioned below the sixth conveying unit, and the third drying plate is positioned within the projection range of the sixth conveying unit in the vertical direction.

7. The microbial fertilizer drying device according to claim 1, characterized in that, It also includes a first blocking group, which is disposed at the first communication port, and the first blocking group includes: The second drive unit is disposed on the inner side wall of the second housing, and the output end of the second drive unit can move up and down relative to the first communication port. The second connecting frame is connected to the output end of the second driving unit, and the width of the second connecting frame is adapted to the width of the first communication port; Multiple blocking blades are spaced apart along the extension direction of the second connecting frame, and the blocking blades are positioned above the second conveying group and do not contact the second conveying group.

8. The microbial fertilizer drying device according to claim 7, characterized in that, The blocking blade has a first side, a second side, and a first arc edge. The first side and the second side are arranged at a third angle to form a tip. The tip faces the first communication port. The first arc edge connects the first side and the second side and is located away from the first communication port.

9. The microbial fertilizer drying device according to claim 1, characterized in that, The drying assembly also includes: The fan is located above the second housing; A guide plate is arranged along the circumference of the second housing, and the fan is arranged in the middle of the guide plate; The guide tube is connected to the output end of the fan and is also connected to the outside.

10. The microbial fertilizer drying device according to claim 1, characterized in that, Also includes: A first sensor group is disposed inside the first chamber. The first sensor group includes a first temperature sensor, a first humidity sensor, a first concentration sensor, and a first liquid level sensor. The first temperature sensor is disposed above the first chamber, the first humidity sensor is disposed on the side wall of the first chamber, the first concentration sensor is disposed at the bottom of the first chamber, and the first liquid level sensor is disposed on the side wall of the first chamber and near the bottom of the first chamber. The second sensor group is disposed inside the second housing. The second sensor group includes a second temperature sensor and a second humidity sensor. The second temperature sensor is disposed above the second housing, and the second humidity sensor is disposed on the side wall of the second housing.

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