Screening apparatus for organic fertilizers
By introducing a drying feed component and a screening component into the organic fertilizer screening equipment, the problems of low screening efficiency and clogging caused by high humidity in traditional equipment are solved, achieving efficient and uniform screening results and adapting to the diverse needs of organic fertilizers.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI JINGAN FERTILIZER TECH CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-05-29
AI Technical Summary
In the existing organic fertilizer production process, traditional screening equipment lacks a heat drying function, cannot cope with the stickiness caused by high moisture content, and has insufficient screening uniformity, resulting in low screening efficiency and frequent equipment blockage.
An organic fertilizer screening device was designed, which includes a drying feed assembly and a screening assembly. The drying feed assembly sprays dry material through a rotating shaft and hot air, while the screening assembly achieves dynamic screening through a conical screening hood and spiral blades. The combination of mechanical stirring and hot air drying prevents material adhesion and blockage, and improves screening efficiency and uniformity.
It effectively reduces the moisture content of materials, prevents screen clogging, improves screening efficiency and uniformity, reduces the need for manual intervention, adapts to the screening needs of diverse organic fertilizer particles, and improves production efficiency and product quality.
Smart Images
Figure CN224293930U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the technical field of organic fertilizer processing equipment, specifically to a screening device for organic fertilizer. Background Technology
[0002] Against the backdrop of agricultural production shifting towards healthier and greener practices, organic fertilizers have become an important choice for modern agriculture due to their wide availability, complete nutrient content, and pollution-free nature. However, the screening and processing stage after organic fertilizer production faces numerous technical bottlenecks, hindering its application effectiveness and production efficiency.
[0003] Most existing organic fertilizers are fermented from livestock and poultry manure, crop straw, and other raw materials. These fertilizers exhibit significant differences in particle size and length, leading to uneven nutrient absorption in farmland and affecting crop growth uniformity when applied directly. Traditional screening equipment generally lacks heat drying capabilities, making it unable to handle the stickiness caused by the high moisture content of organic fertilizers. For example, fertilizers containing biogas residue or fruit pomace are prone to caking during screening due to high moisture content, clogging the screens, reducing screening efficiency, and even requiring frequent shutdowns for cleaning, resulting in production interruptions. Statistics show that when traditional equipment processes high-moisture organic fertilizers, screen clogging occurs 2-3 times per hour, with each cleaning session taking approximately 15-20 minutes, severely impacting production capacity.
[0004] Insufficient screening uniformity is another core problem. Most equipment uses fixed screens and a single vibration mode, which is difficult to adapt to the diversity of organic fertilizer particles. For mixtures of fibrous (such as straw fragments) and granular (such as decomposed manure) materials, the vibration frequency and amplitude of traditional vibrating screens cannot simultaneously meet the screening requirements of different material forms, resulting in the accumulation of fine particles and the residue of coarse particles, with a screening pass rate of less than 70%. For example, when screening compound organic fertilizer, materials with large differences in particle size are prone to forming a "layering" phenomenon on the screen surface, requiring repeated screening more than 3 times to achieve the uniformity requirement. This not only increases energy consumption but may also cause fine particles to agglomerate due to excessive vibration, further reducing the screening effect.
[0005] Furthermore, the lack of a coordinated design between drying and screening creates a vicious cycle for high-moisture materials during screening: high moisture content → easy caking and clogging → decreased screening efficiency → prolonged material retention time → further increase in moisture content. This not only affects screening quality but may also trigger secondary microbial fermentation, leading to nutrient loss in fertilizers. With the increasing demands for fertilizer quality in organic agriculture, the development of new equipment that combines drying, anti-clogging, and uniform screening functions is urgently needed. Utility Model Content
[0006] To overcome the above-mentioned defects, the embodiments of this disclosure provide a screening device for organic fertilizer, which solves the technical problem that traditional screening devices in the prior art generally lack thermal drying function and cannot cope with the stickiness of organic fertilizer caused by high moisture content.
[0007] According to one aspect, at least one embodiment of this disclosure provides a screening device for organic fertilizer, comprising:
[0008] The housing and the feed box, wherein the feed box is disposed on the top of the housing;
[0009] The top frame and the drying feed assembly are provided, wherein the top frame is disposed on the top of the feed box and the drying feed assembly is disposed on the feed box;
[0010] The enclosure includes a circular opening, a base frame, and a screening assembly. The circular opening is located at the bottom of the outer casing, the base frame is fixed inside the circular opening, and the screening assembly is disposed inside the bottom of the outer casing.
[0011] The drying feed assembly includes an air inlet hood, which is fixed on the top frame. A rotating shaft is rotatably connected to the bottom of the air inlet hood. The rotating shaft has a hollow structure, and several stirring rods are provided on the outer surface of the rotating shaft. Several air holes are opened on the surface of the rotating shaft.
[0012] As a further technical solution, a drive motor is fixedly connected to the outside of the air intake cover, a drive gear is provided at the output end of the drive motor, and an external gear is provided on the rotating shaft, with the drive gear meshing with the external gear.
[0013] As a further technical solution, the bottom of the feed box is provided with a mesh, the top frame is equipped with a feed pipe, a conveying auger is provided inside the feed pipe, and the opening of the feed pipe faces directly downward.
[0014] As a further technical solution, the screening assembly includes a second motor, which is mounted on the base frame. A screening cover is provided at the output end of the second motor, and the screening cover is rotatably connected to the bottom of the outer shell. The output end of the second motor is connected to the screening cover.
[0015] As a further technical solution, the inner wall of the outer shell is provided with a baffle, the bottom surface of the baffle is provided with spiral blades, the spiral blades are distributed on the top of the screening hood, the bottom of the outer shell is provided with a centralized discharge hood, and the bottom surface of the outer shell is provided with waste discharge holes around the perimeter.
[0016] As a further technical solution, the screening cover has an overall conical structure, and the bottom surface of the baffle is inclined at the same angle as the surface of the screening cover.
[0017] As a further technical solution, the top of the feed box has an open structure.
[0018] As a further technical solution, the outer wall of the outer shell is provided with several support legs around its perimeter.
[0019] The beneficial effects of the embodiments disclosed herein are as follows:
[0020] 1. The beneficial effects of the drying feeding assembly in this disclosure are that the rotation and tumbling of the rotating shaft and stirring rod prevent material accumulation, and the hot air is evenly sprayed out through the air holes, which can quickly reduce the moisture content of the material and reduce the problems of caking and screen blockage caused by moisture. The gear transmission ensures stable rotation of the shaft and enhances the uniformity of drying. The mesh design at the bottom of the feeding box allows the dried material to fall in time, forming a dynamic balance with the continuous feeding of the conveying auger, and avoiding excessive retention of material in the feeding box. This assembly, through the combination of mechanical tumbling and hot air drying, solves the problem of low screening efficiency caused by high humidity in traditional equipment from the source, and provides a dry and loose material basis for subsequent screening processes.
[0021] 2. The beneficial effects of the screening component in this disclosure are as follows: the rotational motion of the conical screening hood, combined with the spiral blades on the bottom surface of the baffle, causes the material to move along a spiral trajectory, extending the contact time between the material and the screen and improving the fullness of screening. The spiral path design utilizes the combined effect of centrifugal force and gravity to allow fine particles to pass smoothly through the screen holes, while coarse particles move towards the waste discharge hole, avoiding the clogging and stratification phenomena of traditional fixed screens. The partitioned design of the centralized discharge hood and the waste discharge hole achieves efficient separation of materials of different particle sizes, improving the screening qualification rate. At the same time, the guiding effect of the spiral blades reduces the adhesion of materials to the inner wall of the outer shell, ensuring a smooth screening process. This component, through the dynamic spiral screening mode, significantly improves the screening uniformity and efficiency, reduces the need for manual intervention, and adapts to the screening needs of diverse organic fertilizer particles. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0023] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;
[0024] Figure 2 This is an isometric drawing of the present disclosure;
[0025] Figure 3 This is an isometric sectional view of the present disclosure;
[0026] Figure 4 Appendix to this disclosure Figure 3 Enlarged view of part A in the middle;
[0027] In the diagram: 1. Outer shell; 2. Feed box; 3. Top frame; 4. Circular opening; 5. Base frame; 6. Drying feed assembly; 6-1. Air inlet hood; 6-2. Rotating shaft; 6-3. Stirring rod; 6-4. Air hole; 6-5. Drive motor; 6-6. Drive gear; 6-7. External gear; 6-8. Mesh; 6-9. Feed pipe; 6-10. Conveying auger; 7. Screening assembly; 7-1. Second motor; 7-2. Screening cover; 7-3. Baffle; 7-4. Spiral blades; 7-5. Centralized discharge cover; 7-6. Waste discharge hole; 8. Support leg. Detailed Implementation
[0028] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0029] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0030] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0031] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0032] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0033] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0034] like Figure 1 Figure 4 As shown, it illustrates a screening device for organic fertilizer according to an embodiment of the present disclosure, comprising:
[0035] The outer casing 1 and the feed box 2 are disposed on the top of the outer casing 1;
[0036] The top frame 3 and the drying feed assembly 6 are provided, wherein the top frame 3 is disposed on the top of the feed box 2 and the drying feed assembly 6 is disposed on the feed box 2;
[0037] The circular opening 4, the base frame 5, and the screening component 7 are provided. The circular opening 4 is opened at the bottom of the outer shell 1, the base frame 5 is fixed inside the circular opening 4, and the screening component 7 is disposed inside the bottom of the outer shell 1.
[0038] The drying feed assembly 6 includes an air inlet hood 6-1, which is fixed on the top frame 3. A rotating shaft 6-2 is rotatably connected to the bottom of the air inlet hood 6-1. The rotating shaft 6-2 has a hollow structure. Several stirring rods 6-3 are provided on the outer surface of the rotating shaft 6-2. Several air holes 6-4 are opened on the surface of the rotating shaft 6-2. A drive motor 6-5 is fixedly connected to the outside of the air inlet hood 6-1. A drive gear 6-6 is provided at the output end of the drive motor 6-5. An external gear 6-7 is provided on the rotating shaft 6-2. The drive gear 6-6 meshes with the external gear 6-7. A mesh 6-8 is opened at the bottom of the feed box 2. A feed pipe 6-9 is installed on the top frame 3. A conveying auger 6-10 is provided inside the feed pipe 6-9. The opening of the feed pipe 6-9 faces directly downward.
[0039] In some examples, during the pretreatment stage before screening organic fertilizer, a drying feed assembly 6 is designed to prevent the material from sticking together due to moisture, thus affecting screening efficiency. This assembly is based on an air inlet hood 6-1 fixed on the top frame 3. The rotating shaft 6-2, which is rotatably mounted at the bottom of the air inlet hood 6-1, is a hollow structure. The stirring rod 6-3 on the outer surface can agitate the material in the feed box 2 as the shaft rotates, preventing accumulation. The air holes 6-4 on the surface of the rotating shaft 6-2 are connected to the internal cavity. An external heat source introduces hot air into the shaft through the air inlet hood 6-1, and the hot air is evenly sprayed out through the air holes 6-4 to dry the material.
[0040] The drive gear 6-6 at the output end of the drive motor 6-5 meshes with the external gear 6-7 on the rotating shaft 6-2, driving the shaft to rotate at high speed, enhancing the stirring and drying effect. The mesh 6-8 at the bottom of the feed box 2 allows the dried material to fall into the outer shell 1, while the conveying auger 6-10 continuously conveys new material into the air inlet hood 6-1 through the feed pipe 6-9, forming a continuous drying process.
[0041] Through the stirring of the stirring rod 6-3, the uniform spraying of hot air, and the stable drive of the gear transmission, the drying feed assembly 6 realizes the pre-drying treatment of organic fertilizer materials, effectively preventing the materials from sticking and clumping, and creating good conditions for the subsequent screening process.
[0042] like Figures 1-4 As shown in the figure, the screening component 7 in this embodiment includes a second motor 7-1, which is mounted on the base frame 5. A screening cover 7-2 is provided at the output end of the second motor 7-1. The screening cover 7-2 is rotatably connected to the bottom of the outer shell 1. The output end of the second motor 7-1 is connected to the screening cover 7-2. A baffle 7-3 is provided on the inner wall of the outer shell 1. A spiral blade 7-4 is provided on the bottom surface of the baffle 7-3. The spiral blade 7-4 is distributed on the top of the screening cover 7-2. A centralized discharge cover 7-5 is provided at the bottom of the outer shell 1. Waste discharge holes 7-6 are opened around the bottom surface of the outer shell 1.
[0043] In some examples, a screening component 7 is designed to improve the screening effect of organic fertilizer. This component is powered by the second motor 7-1 on the base frame 5. The screening hood 7-2 at its output end is rotatably connected to the bottom of the outer shell 1, which can rotate and screen the falling material. The bottom surface of the baffle 7-3 on the inner wall of the outer shell 1 is provided with spiral blades 7-4. The spiral blades 7-4 are distributed on the top of the screening hood 7-2. When the screening hood 7-2 rotates, the spiral blades 7-4 guide the material to move in a spiral along the inner wall of the outer shell 1, prolonging the residence time of the material in the screening area and ensuring that the particles fully contact the screen.
[0044] Materials meeting the particle size requirements fall through the sieve holes of the screening hood 7-2 and are discharged into the centralized discharge hood 7-5, while larger particles or impurities are conveyed along the spiral path to the waste discharge hole 7-6 on the bottom surface of the outer shell 1 for discharge. This spiral screening path design not only avoids material clogging of the sieve holes, but also improves screening efficiency by extending the screening process, enabling effective separation of materials of different particle sizes.
[0045] Through the coordinated operation of components such as the second motor 7-1, screening cover 7-2, spiral blades 7-4, baffle 7-3, and waste discharge hole 7-6, the screening assembly 7 achieves efficient spiral screening function, ensuring the smoothness and accuracy of organic fertilizer screening.
[0046] For example, such as Figure 3 As shown, the screening cover 7-2 has an overall conical structure, and the bottom surface of the baffle 7-3 has the same inclination angle as the surface of the screening cover 7-2.
[0047] In some examples, the conical structure, combined with the spiral blades 7-4, can increase screening efficiency and prevent clogging that could reduce the screening flow rate.
[0048] For example, such as Figure 1 As shown, the top of the feed box 2 has an open structure.
[0049] In some examples, the open structure allows moisture generated during drying to escape upwards, preventing internal heat buildup and excessive temperature.
[0050] For example, such as Figure 1 As shown, a number of support legs 8 are arranged around the outer wall of the outer shell 1.
[0051] In some examples, multiple support legs 8 are provided to raise the outer casing 1 to a certain height, which facilitates material discharge.
[0052] In actual use: Organic fertilizer is fed into the top opening of the feed box 2. The conveying auger 6-10 transports the material to the feed box 2 below the air intake hood 6-1 through the feed pipe 6-9. The drive motor 6-5 drives the rotating shaft 6-2 to rotate through the meshing of the drive gear 6-6 and the external gear 6-7. The stirring rod 6-3 stirs the material. At the same time, hot air is sprayed out from the air holes 6-4 on the surface of the rotating shaft 6-2 to dry the material. The dried material falls into the outer shell 1 through the mesh 6-8 at the bottom of the feed box 2. The second motor 7-1 drives the conical screening hood 7-2 to rotate. The spiral blades 7-4 on the bottom surface of the baffle 7-3 guide the material to move in a spiral motion along the inner wall of the outer shell 1. Fine particles fall through the screen holes of the screening hood 7-2 into the centralized discharge hood 7-5 for discharge. Coarse particles or impurities are discharged from the waste discharge hole 7-6 along the spiral path. The support leg 8 supports the outer shell 1 to facilitate material discharge. The whole process realizes the operation of drying and screening organic fertilizer.
[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A screening device for organic fertilizer, characterized in that, include: The outer casing (1) and the feed box (2) are disposed on the top of the outer casing (1); The top frame (3) and the drying feed assembly (6) are provided on the top of the feed box (2) and the drying feed assembly (6) is provided on the feed box (2). The circular opening (4), the base frame (5), and the screening component (7) are provided. The circular opening (4) is opened at the bottom of the outer shell (1), the base frame (5) is fixed inside the circular opening (4), and the screening component (7) is disposed inside the bottom of the outer shell (1). The drying feed assembly (6) includes an air inlet hood (6-1), which is fixed on the top frame (3). The bottom of the air inlet hood (6-1) is rotatably connected to a rotating shaft (6-2). The rotating shaft (6-2) has a hollow structure. Several stirring rods (6-3) are provided on the outer surface of the rotating shaft (6-2). Several air holes (6-4) are opened on the surface of the rotating shaft (6-2).
2. The screening equipment for organic fertilizer according to claim 1, characterized in that, A drive motor (6-5) is fixedly connected to the outside of the air intake shroud (6-1). A drive gear (6-6) is provided at the output end of the drive motor (6-5). An external gear (6-7) is provided on the rotating shaft (6-2). The drive gear (6-6) meshes with the external gear (6-7).
3. The screening equipment for organic fertilizer according to claim 2, characterized in that, The bottom of the feed box (2) is provided with a mesh (6-8), and the top frame (3) is equipped with a feed pipe (6-9). A conveying auger (6-10) is provided inside the feed pipe (6-9), and the opening of the feed pipe (6-9) faces directly downward.
4. The screening equipment for organic fertilizer according to claim 1, characterized in that, The screening assembly (7) includes a second motor (7-1), which is mounted on the base frame (5). The output end of the second motor (7-1) is provided with a screening cover (7-2), which is rotatably connected to the bottom of the outer shell (1). The output end of the second motor (7-1) is connected to the screening cover (7-2).
5. The screening equipment for organic fertilizer according to claim 4, characterized in that, The inner wall of the outer shell (1) is provided with a baffle (7-3), the bottom surface of the baffle (7-3) is provided with a spiral blade (7-4), the spiral blade (7-4) is distributed on the top of the screening hood (7-2), the bottom of the outer shell (1) is provided with a centralized discharge hood (7-5), and the bottom surface of the outer shell (1) is provided with a waste discharge hole (7-6) around the perimeter.
6. The screening equipment for organic fertilizer according to claim 5, characterized in that, The screening cover (7-2) has an overall conical structure, and the bottom surface of the baffle (7-3) is inclined at the same angle as the surface of the screening cover (7-2).
7. The screening equipment for organic fertilizer according to claim 1, characterized in that, The top of the feed box (2) has an open structure.
8. The screening equipment for organic fertilizer according to claim 1, characterized in that, The outer wall of the outer shell (1) is provided with several supporting legs (8) around its perimeter.