Multi-layer circulation belt type electric heating compound fertilizer drying equipment and process thereof

Abstract

The invention belongs to the technical field of compound fertilizer drying, and provides multi-layer circulation belt type electric heating compound fertilizer drying equipment and a process thereof.The multi-layer circulation belt type electric heating compound fertilizer drying equipment comprises multiple sets of main body frames, and all the sets of main body frames are connected in a contact mode; the conveying assembly is mounted at the front end of the first group of main body frames and the tail end of the last group of main body frames and is used for conveying compound fertilizer materials; the feeding assembly is arranged at the front end of the conveying assembly and used for stirring the fed compound fertilizer materials. The drying assembly is arranged above the main body frame and is used for drying the conveyed compound fertilizer materials; each group of electric control boxes is correspondingly arranged on one side of each group of main body frames and is used for controlling each assembly device; through layer-by-layer circulation of the three layers of conveying belts, the retention time of materials in the equipment is remarkably prolonged, sufficient evaporation of water is ensured, the drying temperature and distance are rapidly adjusted according to the characteristics and thicknesses of different materials, and efficient drying is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of compound fertilizer drying, and specifically relates to a multi-layer flow-through belt type electric heating compound fertilizer drying equipment and its process. Background Art

[0002] In modern agricultural production, compound fertilizers, as the core agricultural capital products for improving crop yields and qualities, the optimization of their production processes is of great significance for ensuring the sustainable development of agriculture. Drying, as a key process in compound fertilizer production, directly affects the moisture content, particle uniformity, and chemical stability of the products;

[0003] However, the existing compound fertilizer drying equipment mainly adopts single-layer belt drying or multi-layer co-current drying technology. The single-layer belt drying equipment realizes material drying through a single transmission. Its disadvantage is that the contact time between the material and hot air is short, resulting in insufficient moisture evaporation. Especially for materials with high moisture content, they need to be redried multiple times, leading to low production efficiency. At the same time, the single-layer drying mode is prone to uneven heating of the material, and some particles may be charred or nutrient decomposed due to local high temperature, affecting the product quality; Although the multi-layer co-current drying equipment extends the residence time of the material through a layered design, the transmission directions of all layers are the same, and the material only passes through the drying area in a single pass, with limited heat exchange efficiency, making it difficult to achieve deep drying, and the equipment space utilization rate is low, increasing the enterprise's site and equipment investment costs.

[0004] Moreover, most of the traditional drying technologies do not pre-treat the materials. The caked compound fertilizers will cause great wear on the conveyor belt and idler during the transmission process, shortening the service life of the equipment; during the drying process, the material accumulation leads to too high local temperature, which is easy to cause the heating pipe to age or even be damaged. Frequent equipment maintenance not only increases the enterprise's operation cost, but also reduces the production efficiency due to shutdown for maintenance.

[0005] Therefore, those skilled in the art have proposed a multi-layer flow-through belt type electric heating compound fertilizer drying equipment and its process, aiming to significantly extend the residence time of the material in the equipment through three-layer conveyor belts flowing layer by layer, ensure sufficient moisture evaporation, and quickly adjust the drying temperature and distance according to different material characteristics and thicknesses to achieve efficient drying. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a multi-layer flow-through belt type electric heating compound fertilizer drying equipment and its process to solve the problems raised in the background art.

[0007] According to the first aspect of the present disclosure, a multi-layer flow-through belt type electric heating compound fertilizer drying equipment is proposed, including:

[0008] The main body frame, provided with multiple groups, and each group of main body frames is connected in a contact manner;

[0009] The conveying assembly is installed at the front end of the first group of the main frames and the end of the last group of the main frames, and is used for conveying compound fertilizer materials;

[0010] The feeding assembly is arranged on the front end of the conveying assembly and is used for stirring the compound fertilizer materials during feeding;

[0011] The drying assembly is arranged above the main frames and is used for drying the conveyed compound fertilizer materials;

[0012] The electric control boxes are provided in multiple groups, and each group is correspondingly arranged on one side of each group of main frames and is used for controlling each component device.

[0013] Preferably, the main frames are provided with three layers, and a drying assembly is arranged on each layer.

[0014] Preferably, the conveying assembly further includes fixing frames arranged at the front end of each layer of the first group of the main frames and the end of each layer of the last group of the main frames. The inner side of the fixing frames is equidistantly provided with idler rollers, and the idler rollers are also equidistantly arranged inside the main frames. First motors are installed on the fixing frames at the outer ends of each layer of the main frames. The output end of the first motor is provided with a first chain. Transmission rollers are arranged at the frontmost and rearmost ends of the fixing frames, and the other end of the first chain is connected to the transmission rollers. Transmission belts are arranged between the transmission rollers of each layer;

[0015] A first blanking box is fixedly installed above the end of the second layer of the fixing frame, and a second blanking box is fixedly installed above the front end of the third layer of the fixing frame. The inner sides of the first blanking box and the second blanking box are both arranged as inclined planes; limiters and photoelectric switches are oppositely arranged on the inner side of each layer of the fixing frame.

[0016] Preferably, the feeding assembly further includes a feeding box fixedly arranged above the middle of the first layer of the fixing frame. A second motor is fixedly installed on one side of the second layer of the fixing frame. The output end of the second motor is provided with a second chain. A rotating shaft is movably arranged inside the feeding box, and the other end of the second chain is connected to the rotating shaft. Stirring blades are equidistantly arranged on the outer side of the rotating shaft.

[0017] Preferably, the drying assembly further includes drying boxes arranged above each layer of the main frames. A heat dissipation pipe is arranged at the upper end of the drying box, and two groups of heat dissipation pipes are provided. Heating pipes are fixedly installed on both sides of the drying box. Hydraulic presses are fixedly installed at the front and rear ends of both sides of each layer of the main frames. Connecting rods are fixedly installed at the front and rear ends of both sides of the drying box, and the output end of the hydraulic press is fixedly connected to the connecting rod.

[0018] According to the second aspect of the present disclosure, a multi-layer flow belt type electric heating compound fertilizer drying process is proposed, including the following steps:

[0019] S1. Pour the compound fertilizer material from the feeding box, start the second motor to rotate the rotating shaft, and stir the poured compound fertilizer material through the stirring blades.

[0020] S2. The stirred and broken compound fertilizer material falls onto the conveyor belt of the first-layer fixed frame. Start the first motor to make the compound fertilizer material enter the drying box through the transmission rollers and supporting rollers.

[0021] S3. By starting the hydraulic press, drive the drying box to rise and fall through the connecting rod to facilitate adjusting the height of the drying box.

[0022] S4. Start the heating tube to dry the compound fertilizer material in the drying box. At the same time, the conveyor belt gradually transports the compound fertilizer material to the end of the first layer.

[0023] S5. The compound fertilizer material falls from the end of the first layer, drops through the first discharge box onto the conveyor belt of the second layer of the main frame for reverse transmission, and undergoes the same drying treatment as the first layer.

[0024] S6. After being dried on the second layer, the compound fertilizer material drops through the second discharge box onto the conveyor belt of the third layer, undergoes transmission in the same direction as the first layer, and undergoes the same drying treatment as the first and second layers until the compound fertilizer material is transported to the fixed frame at the end of the third layer and drops, completing the overall drying process.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention forms a "zigzag" drying path by gradually flowing through three conveyor belts layer by layer, significantly prolonging the residence time of the material in the equipment to ensure sufficient evaporation of moisture. And the material naturally drops between layers through the discharge box to form multi-layer countercurrent heat exchange.

[0027] 2. The present invention reduces the wear of components such as the conveyor belt and supporting rollers of the equipment due to material caking through pre-treatment stirring of the material; the multi-layer flow drying method makes the material evenly heated, avoiding excessive loss of components such as the heating tube due to local high temperature, thereby prolonging the overall service life of the equipment.

[0028] 3. The electric heating tube of the drying component of the present invention has rapid temperature rise and precise temperature control. Combined with the drying box with adjustable height, it can quickly adjust the drying temperature and distance according to different material characteristics and thicknesses in the process to achieve efficient drying; and the limiter and photoelectric switch are used to monitor the status of the conveyor belt and material in real time. During the process operation, problems such as conveyor belt deviation and material blockage can be detected and corrected in time to ensure the stability of material transmission in each layer, and further ensure the consistency of drying quality. Description of the Drawings

[0029] Figure 1Schematic diagram of the overall structure of the present invention;

[0030] Figure 2 Schematic diagram of the front-end structure of each layer of the main framework of the present invention;

[0031] Figure 3 Schematic diagram of the end structure of each layer of the main framework of the present invention;

[0032] Figure 4 Schematic diagram of the feeding component structure of the present invention;

[0033] Figure 5 Process flow diagram of the multi-layer circulating belt type electro-heated compound fertilizer drying process of the present invention.

[0034] In the figure:

[0035] 100, main framework; 200, conveying component; 201, fixing frame; 202, idler roller; 203, first motor; 204, first chain belt; 205, transmission roller; 206, first feeding box; 207, second feeding box; 208, limiter; 209, photoelectric switch; 300, feeding component; 301, feeding box; 302, second motor; 303, second chain; 304, rotating shaft; 305, stirring blade; 400, drying component; 401, drying box; 402, heat dissipation pipe; 403, heating pipe; 404, hydraulic press; 405, connecting rod; 500, electric control box. Specific embodiments

[0036] The following further describes in detail the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0037] Example 1: As shown in the appendix Figure 1 The present invention provides a multi-layer circulating belt type electro-heated compound fertilizer drying device, including:

[0038] There are multiple groups of main frameworks 100, and each group of main frameworks 100 is connected in a contact manner; the main framework 100 is provided with three layers, and each layer is provided with a drying component 400. This three-layer structure design realizes the multi-layer drying of compound fertilizer materials, prolongs the residence time of the materials in the device, makes the drying process more sufficient, improves the uniformity of material drying, improves the drying efficiency, and the multiple groups of main frameworks 100 are connected, and the length of the device can be flexibly expanded according to production needs to adapt to different production capacity scales.

[0039] As shown in the appendix Figure 2 and Figure 3As shown, the conveying assembly 200 is installed at the front end of the first group of main frames 100 and the end of the last group of main frames 100 for conveying compound fertilizer materials. The conveying assembly 200 further includes fixing frames 201 provided at the front end of each layer of the first group of main frames 100 and the end of each layer of the last group of main frames 100. Idler rollers 202 are equidistantly arranged inside the fixing frames 201, and the idler rollers 202 are also equidistantly arranged inside the main frames 100. First motors 203 are installed on the fixing frames 201 located at the outer ends of each layer of the main frames 100. A first chain is provided at the output end of the first motor 203. Transmission rollers 205 are provided at the frontmost and rearmost ends of the fixing frames 201. The other end of the first chain is connected to the transmission roller 205. A conveyor belt is provided between the transmission rollers 205 of each layer. The compound fertilizer materials are conveyed from the front end to the end of the equipment through the conveyor belt (supported by the idler rollers 202) to achieve continuous production, and the first motor 203 drives the transmission roller 205 to rotate through the first chain to provide power for the conveyor belt.

[0040] A first feeding box 206 is fixedly installed above the end of the second layer of the fixing frame 201, and a second feeding box 207 is fixedly installed above the front end of the third layer of the fixing frame 201. The inner sides of the first feeding box 206 and the second feeding box 207 are both set as inclined planes. Limiters 208 and photoelectric switches 209 are oppositely arranged on the inner side of each layer of the fixing frame 201. Among them, the limiter 208 is used to limit the position of the conveyor belt to prevent deviation, and the photoelectric switch 209 is used to detect the material position or the running state of the conveyor belt to achieve automatic control. The first feeding box 206 is located at the end of the second layer and is used to guide the materials on the first layer onto the conveyor belt of the second layer. The second feeding box 207 is located at the front end of the third layer and is used to guide the materials on the second layer onto the conveyor belt of the third layer. This continuous conveying reduces manual intervention and improves production efficiency. Its multi-layer flow design enables the materials to be circulated and dried between different layers, enhancing the uniformity and thoroughness of the drying effect.

[0041] As Figure 4As shown in the figure, the feeding component 300 is arranged at the front end of the conveying component 200 and is used for stirring the compound fertilizer material during feeding. The feeding component 300 also includes a feeding box 301 fixedly arranged above the middle of the first layer of the fixing frame 201. A second motor 302 is fixedly installed on one side of the second layer of the fixing frame 201. A second chain 303 is arranged at the output end of the second motor 302. A rotating shaft 304 is movably arranged inside the feeding box 301. The other end of the second chain 303 is connected to the rotating shaft 304. Stirring blades 305 are arranged at equal intervals on the outer side of the rotating shaft 304. The second motor 302 drives the rotating shaft 304 and the stirring blades 305 through the second chain 303 to stir the compound fertilizer material entering the equipment. The material agglomeration is broken by the stirring blades 305 to make the material evenly dispersed, avoid accumulation, and ensure the subsequent drying effect. After the pretreatment of the compound fertilizer material by the feeding component 300, the problems of local dampness or caking during the drying process are reduced, and the drying efficiency and quality are improved.

[0042] As Figure 2 As shown in the figure, the drying component 400 is arranged above the main body frame 100 and is used for drying the conveyed compound fertilizer material. The drying component 400 also includes drying boxes 401 arranged above each layer of the main body frame 100. A heat dissipation pipe 402 is arranged at the upper end of the drying box 401. There are two groups of heat dissipation pipes 402. Heating pipes 403 are fixedly installed on both sides of the drying box 401. Hydraulic presses 404 are fixedly installed at the front and rear ends of both sides of each layer of the main body frame 100. Connecting rods 405 are fixedly installed at the front and rear ends of both sides of the drying box 401. The output end of the hydraulic press 404 is fixedly connected to the connecting rod 405. The heating pipes 403 are installed on both sides of the drying box 401 and generate heat through electric heating to directly heat and dry the material on the conveyor belt. The heat dissipation pipes 402 are distributed at the upper end of the drying box 401 to accelerate the heat circulation and dissipation and improve the drying efficiency. At the same time, the hydraulic press 404 is connected to the drying box 401 through the connecting rod 405, and the distance between the drying box 401 and the conveyor belt can be adjusted to adapt to material layers of different thicknesses and ensure the drying effect. The drying box 401 is arranged above the conveyor belt to form an approximately closed heating space, reduce heat loss, and improve the heat utilization rate. This electric heating method has a fast heating rate and accurate temperature control, which is suitable for the temperature requirements of compound fertilizer drying. And the adjustable height of the drying box 401 enhances the adaptability of the equipment to different materials, and the drying effect is more controllable.

[0043] The electric control boxes 500 are arranged in multiple groups, and each group is correspondingly arranged on one side of each group of main body frames 100 for controlling each component device. Each group of main body frames 100 corresponds to an electric control box 500, which independently controls the start-stop and parameter settings of equipment such as motors, heating pipes 403, hydraulic presses 404, and photoelectric switches 209 in this area.

[0044] As can be seen from the above, the compound fertilizer material is transferred layer by layer between the three-layer conveyor belts through the feeding box, extending the drying path. In cooperation with the drying component 400, multi-stage and multi-angle drying is achieved to ensure that the moisture content of the material meets the standard uniformly. The position limiter 208, photoelectric switch 209 and the electric control box 500 are linked to monitor the status of the conveyor belt and the material in real time, preventing faults such as deviation and blockage, and ensuring the continuous and stable operation of the equipment. Moreover, the design of the enclosed drying box 401 and the heat dissipation pipe 402 reduces heat loss, and the adjustable drying height avoids energy waste, improving the energy efficiency of the equipment. Through the coordinated action of each component, the equipment realizes the automatic feeding, multi-layer drying and continuous conveying of the compound fertilizer material, and has the advantages of high drying efficiency, good uniformity and low energy consumption.

[0045] Embodiment 2: As shown in the attached Figure 5 figures, the invention provides a multi-layer flow belt type electro-heated compound fertilizer drying process, which includes the following steps:

[0046] S1. Pour the compound fertilizer material from the feeding box 301, start the second motor 302 to rotate the rotating shaft 304, and stir the poured compound fertilizer material through the stirring blades 305;

[0047] S2. The stirred and broken compound fertilizer material falls onto the conveyor belt of the first-layer fixed frame 201, and start the first motor 203 to make the compound fertilizer material enter the drying box 401 through the conveyor rollers 205 and the supporting rollers 202;

[0048] S3. By starting the hydraulic press 404, drive the drying box 401 to lift through the connecting rod 405 to facilitate the adjustment of the height of the drying box 401;

[0049] S4. Start the heating pipe 403 to dry the compound fertilizer material in the drying box 401, and at the same time, the conveyor belt gradually transports the compound fertilizer material to the end of the first layer;

[0050] S5. The compound fertilizer material falls from the end of the first layer, and falls into the second-layer conveyor belt of the main frame 100 through the first feeding box 206 for reverse transportation, and is subjected to the same drying treatment as the first layer;

[0051] S6. After the compound fertilizer material is dried in the second layer, it falls onto the third-layer conveyor belt through the second feeding box 207, is transported in the same direction as the first layer, and is subjected to the same drying treatment as the first layer and the second layer until the compound fertilizer material is transported to the fixed frame 201 at the end of the third layer and falls off, completing the overall drying treatment.

[0052] As can be seen from the above, the material flows layer by layer through the three-layer conveyor belt (the first layer is forward transmission → the second layer is reverse transmission → the third layer is forward transmission), forming a zigzag drying path, which significantly prolongs the residence time of the material in the equipment and ensures that the water evaporates fully. Compared with single-layer drying, multi-layer circulation allows the material to be heated in multiple stages and angles to avoid incomplete local drying, which is especially suitable for compound fertilizer materials with high moisture content or agglomeration. In addition, the hydraulic press 404 drives the drying box 401 to rise and fall, and the distance between the drying box 401 and the conveyor belt can be adjusted according to the material stacking thickness (such as different output or material characteristics), and the heat conduction efficiency can be accurately controlled. At the same time, the heating tube 403 adopts electric heating, and cooperates with the electric control box 500 to monitor the temperature in real time, which can quickly heat up and maintain the set temperature range, adapting to the temperature-sensitive characteristics of compound fertilizer drying. Its high-precision temperature control reduces the problem of unstable drying quality caused by temperature fluctuations.

[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in the application. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to specific embodiments, but extends to a variety of modifications still falling within the scope of the appended claims.

[0054] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0055] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, without undue experimentation, the development effort will be a routine task of design, fabrication, and production.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-layer flow belt type electric heating compound fertilizer drying device, characterized in that, Including: The main body frames (100) are provided in multiple groups, and each group of main body frames (100) is connected in a contact manner; The conveying assembly (200) is installed at the front end of the first group of the main body frames (100) and the end of the last group of the main body frames (100) for conveying compound fertilizer materials; The feeding assembly (300) is arranged at the front end of the conveying assembly (200) for stirring the fed compound fertilizer materials; The drying assembly (400) is arranged above the main body frames (100) for drying the conveyed compound fertilizer materials; The electric control boxes (500) are provided in multiple groups, and each group is correspondingly arranged on one side of each group of main body frames (100) for controlling each component device.

2. The multi-layer flow belt type electric heating compound fertilizer drying equipment according to claim 1, wherein: The main body frames (100) are provided with three layers, and each layer is provided with a drying assembly (400).

3. The multi-layer flow belt type electric heating compound fertilizer drying equipment according to claim 2, characterized in that: The conveying assembly (200) further includes fixing frames (201) arranged at the front end of each layer of the first group of the main body frames (100) and the end of each layer of the last group of the main body frames (100). The inner side of the fixing frames (201) is equidistantly provided with idler rollers (202). The idler rollers (202) are also equidistantly arranged on the inner side of the main body frames (100). First motors (203) are installed on the fixing frames (201) at the outer ends of each layer of the main body frames (100). The output end of the first motor (203) is provided with a first chain. Transmission rollers (205) are arranged at the frontmost and rearmost ends of the fixing frames (201). The other end of the first chain is connected to the transmission roller (205). A transmission belt is arranged between the transmission rollers (205) of each layer; A first blanking box (206) is fixedly installed above the end of the second layer of the fixing frame (201), and a second blanking box (207) is fixedly installed above the front end of the third layer of the fixing frame (201). The inner sides of the first blanking box (206) and the second blanking box (207) are both set as inclined planes; Limiters (208) and photoelectric switches (209) are oppositely arranged on the inner side of each layer of the fixing frame (201).

4. The multi-layer flow belt type electric heating compound fertilizer drying equipment according to claim 3, wherein: The feeding assembly (300) further includes a feeding box (301) fixedly arranged above the middle of the first layer of the fixing frame (201). A second motor (302) is fixedly installed on one side of the second layer of the fixing frame (201). The output end of the second motor (302) is provided with a second chain (303). A rotating shaft (304) is movably arranged inside the feeding box (301). The other end of the second chain (303) is connected to the rotating shaft (304). Stirring blades (305) are equidistantly arranged on the outer side of the rotating shaft (304).

5. The multi-layer flow belt type electric heating compound fertilizer drying equipment according to claim 4, characterized in that: The drying component (400) further includes a drying box (401) disposed above each layer of the main body frame (100). A heat dissipation pipe (402) is provided at the upper end of the drying box (401). There are two groups of the heat dissipation pipes (402). Heating pipes (403) are fixedly installed on both sides of the drying box (401). Hydraulic presses (404) are fixedly installed at the front and rear ends on both sides of each layer of the main body frame (100). Connecting rods (405) are fixedly installed at the front and rear ends on both sides of the drying box (401). The output end of the hydraulic press (404) is fixedly connected to the connecting rod (405).

6. A multi-layer flow-through belt type electric heating compound fertilizer drying process, characterized in that, It includes the following steps: S1. Pour the compound fertilizer material from the feeding box, start the second motor to rotate the rotating shaft, and stir the poured compound fertilizer material through the stirring blades; S2. The stirred and broken compound fertilizer material falls onto the conveyor belt of the first-layer fixed frame. Start the first motor to make the compound fertilizer material enter the drying box through the conveyor rollers and supporting rollers; S3. By starting the hydraulic press, the connecting rod drives the drying box to lift and lower, facilitating the adjustment of the height of the drying box; S4. Start the heating pipes to dry the compound fertilizer material in the drying box. At the same time, the conveyor belt gradually transports the compound fertilizer material to the end of the first layer; S5. The compound fertilizer material falls from the end of the first layer, drops through the first discharge box onto the conveyor belt of the second layer of the main body frame for reverse transportation, and undergoes the same drying treatment as the first layer; S6. After the compound fertilizer material is dried on the second layer, it drops through the second discharge box onto the conveyor belt of the third layer for transportation in the same direction as the first layer, and undergoes the same drying treatment as the first and second layers until the compound fertilizer material is transported to the fixed frame at the end of the third layer and drops, completing the overall drying treatment.

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