Water-soluble fertilizer processing system

Abstract

The utility model discloses a kind of water-soluble fertilizer processing systems, it is related to fertilizer production equipment technical field.The system includes material conveying mechanism for conveying raw materials from first horizontal height to second horizontal height, discharge platform is arranged at second horizontal height of working surface, be arranged in one side of discharge platform for carrying out primary mixing of raw materials agitator, be arranged in the discharge port below of agitator for storing agitated material storage bin, and with the discharge port of storage bin connection is used for the output agitated material spiral discharging machine;Storage bin inside is equipped with secondary stirring device.The utility model passes through setting with the discharge platform of the discharge end of elevator same height and feeding rack, optimization man-machine operation process, greatly improve production efficiency;Adopt double stirring process of primary mixing+slow secondary stirring in storage bin, and collaborative design with spiral discharging machine, solve material segregation and discharge blockage problem, improve product mixing uniformity, quality stability and packing smoothness.

Description

Technical Field

[0001] This utility model relates to the field of fertilizer production equipment technology, specifically to a water-soluble fertilizer processing system. Background Technology

[0002] Water-soluble fertilizer is a multi-element compound fertilizer that can completely dissolve in water and be directly absorbed and utilized by crops. During its production, the uniformity of material mixing is crucial and directly affects fertilizer efficiency.

[0003] Existing water-soluble fertilizer production equipment typically employs single-stage mixing, resulting in limited mixing uniformity and a tendency for segregation (layering of materials of different densities) to occur during storage and discharge, leading to uneven composition in the finished fertilizer. Furthermore, material bridging or clumping can cause discharge obstructions during packaging, affecting packaging efficiency and metering accuracy. Therefore, a water-soluble fertilizer production system with more uniform mixing and more stable and smooth discharge is needed. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a water-soluble fertilizer production system with high mixing uniformity, smooth discharge and low segregation.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A water-soluble fertilizer processing system includes a material conveying mechanism for conveying raw materials from a first horizontal height to a second horizontal height, a discharge platform with its working surface at the second horizontal height, a mixer located on one side of the discharge platform for primary mixing of the raw materials, a storage silo located below the discharge port of the mixer for storing the mixed materials, and a screw conveyor connected to the discharge port of the storage silo for discharging the mixed materials; a secondary mixing device is provided inside the storage silo.

[0006] Furthermore, a feeding rack for receiving raw materials is provided above the feed inlet of the mixer. The feeding rack is fixed to the discharge platform by a bracket, and the load-bearing surface of the feeding rack is a grid structure.

[0007] Furthermore, the feeding rack is detachably equipped with a screen for filtering large particulate impurities in the raw materials.

[0008] Furthermore, the mixer's discharge port is located directly above the storage silo. The mixer is equipped with a discharge mechanism, which includes a discharge plate for sealing the mixer's discharge port, a vertical connecting rod connected to the discharge plate, and a horizontal connecting rod connected to the vertical connecting rod and driving the discharge plate to rotate to open and close the mixer's discharge port. The outer wall of the mixer is equipped with a sleeve, and the vertical connecting rod rotates through the sleeve. A limiting ring adapted to the sleeve is provided on the vertical connecting rod.

[0009] Furthermore, the outer edge of the discharge plate is provided with an upwardly extending wing plate that is adapted to the outer wall of the mixer. The wing plate is in contact with the outer wall of the mixer when the discharge port of the mixer is completely closed by the discharge plate.

[0010] Furthermore, the secondary mixing device includes a mixing shaft located in the center of the storage silo and multiple mixing blades fixedly installed on the mixing shaft. The arrangement direction of the mixing blades is adapted to the rotation direction of the spiral blades of the screw conveyor.

[0011] Furthermore, the storage silo has observation windows on its walls; the discharge platform has stairs or ladders leading to the ground; and a guardrail is installed above the feed inlet of the mixer, with both ends of the guardrail fixed to the discharge platform.

[0012] Furthermore, the stirring speed of the secondary stirring device is lower than that of the mixer.

[0013] Furthermore, it also includes a crusher for pre-processing raw materials before the material conveying mechanism, which is a vertical elevator or an inclined conveyor belt.

[0014] Furthermore, a weighing scale is installed at the outlet end of the screw conveyor.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention optimizes the human-machine operation process and significantly improves production efficiency by setting up a discharge platform and feeding rack at the same height as the discharge end of the elevator. It adopts a dual mixing process of primary mixing and secondary slow mixing in the storage silo, and designs it in conjunction with the screw conveyor to solve the problems of material segregation and discharge blockage, thereby improving the product mixing uniformity, quality stability and packaging smoothness. At the same time, by adding a grid or screen in the feeding stage, the particle size of the raw materials is controlled from the source, ensuring the quality of the finished product. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a top view showing the connection of the discharge platform, mixer, storage silo, and screw conveyor.

[0018] Figure 3 This is a schematic diagram of the material discharge mechanism.

[0019] Figure 4 This is a schematic diagram showing the opening of the discharge plate.

[0020] Figure 5 This is a schematic diagram of the mixing structure of a mixer (only part of the mixing blade is shown).

[0021] The names corresponding to the reference numerals in the attached figures are as follows: 1-Material conveying mechanism, 2-Discharge platform, 3-Mixer, 4-Storage silo, 5-Screw conveyor, 6-Crusher, 7-Measuring scale, 21-Staircase / ladder, 31-Feeding rack, 32-Discharge mechanism, 33-Guardrail, 34-Main mixing shaft, 35-Paddle shaft, 36-Paddle blade, 37-Scraper, 41-Mixing shaft, 42-Mixing blade, 43-Observation window, 321-Discharge plate, 322-Sleeve, 323-Vertical connecting rod, 324-Horizontal connecting rod, 325-Wing plate, 326-Limiting retaining ring. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; of course, they can also refer to a mechanical connection or an electrical connection; furthermore, they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] like Figures 1-5As shown, the present invention provides a water-soluble fertilizer processing system, including a material conveying mechanism 1 for conveying raw materials from a first horizontal height to a second horizontal height, a discharge platform 2 with its working surface set at the second horizontal height, a mixer 3 located on one side of the discharge platform 2 for primary mixing of the raw materials, a storage silo 4 located below the discharge port of the mixer 3 for storing the mixed materials, and a screw conveyor 5 connected to the discharge port of the storage silo 4 for discharging the mixed materials; the storage silo 4 is equipped with a secondary mixing device. The mixer 3 is fixed to one side of the discharge platform 2 by a bracket and partially embedded in the discharge platform 2. The bracket is typically connected to the main frame of the discharge platform 2 and the factory floor or load-bearing structure by welding or high-strength bolts to ensure the stability and safety of the equipment during operation.

[0026] This utility model achieves efficient, continuous, and high-quality production of water-soluble fertilizer from raw materials to finished products through the synergistic effect of three-dimensional layout, two-stage stirring to prevent segregation, and forced spiral discharge. Specifically, the material conveying mechanism 1 lifts the raw material bag containing the raw material from the ground (first horizontal height) to the working surface (second horizontal height) of the discharge platform (2). It combines the vertical lifting path of the material with the horizontal operating platform of the personnel, forming a compact three-dimensional layout, separating the flow of people and materials, and laying the foundation for subsequent centralized and efficient operation. The operator places the lifted raw material bag on the feeding rack above the feed inlet of the mixer 3 on the discharge platform 2. After the bag is broken, the raw material falls into the mixer 3. The mixer 3, as the main mixing unit, performs high-speed and forced mechanical stirring of various raw materials. The stirring time is 5-10 minutes, completing the initial, large-volume uniform mixing (i.e., one stirring). The mixed material after one stirring falls into the storage bin 4 below. Preferably, the storage bin 4 is a top-opening bin. At this point, the secondary stirring device inside the storage silo 4 is activated, continuously and slowly agitating the material for 3-5 minutes. This agitation is not vigorous mixing, but rather aims to disrupt the stratification tendency (segregation) that occurs when the material is left to stand due to differences in particle size and density. The storage silo 4 further acts as a homogenization buffer, ensuring that the material maintains extremely high uniformity before entering packaging. The qualified material after secondary homogenization is output from the bottom of the storage silo 4 by a screw conveyor 5. The screw conveyor 5 generates forced thrust through the rotation of the screw blades, effectively overcoming the bridging and clogging problems at the bottom of the silo, achieving continuous, stable, and controllable discharge. Finally, the material is conveyed to the weighing scale 7 at the outlet for precise packaging, completing the entire processing flow. This invention optimizes the process flow through spatial layout, complements the mixing and anti-segregation functions of two-stage stirring, and combines the stability of screw conveying to systematically solve a series of problems in traditional water-soluble fertilizer production, such as low efficiency, poor uniformity, and easy clogging.

[0027] The mixing structure inside the mixer 3 of this utility model includes a mixing main shaft 34 and multiple mixing blades mounted on the mixing main shaft 34. Each mixing blade includes a blade shaft 35 inclined to the mixing shaft and blades 36 located at the bottom of the blade shaft 35. Each blade shaft 35 has a different inclination angle and radius, thus achieving mixing of materials throughout the machine. Furthermore, this mixing structure ensures that all materials inside the mixer 3 are discharged from the discharge port during the mixing and discharging process. Preferably, the blade shaft 35 is equipped with inclined scraper plates 37, each with a different inclination angle, which further improves mixing and discharging efficiency. The above mixing structure is a specific description of the prior art, driven by a motor or other driving device.

[0028] The mixer 3 of this invention has a feeding rack 31 above its inlet for receiving raw materials. The feeding rack 31 is fixed to the discharge platform 2 by a bracket, and the load-bearing surface of the feeding rack 31 is a grid structure. The feeding rack 31 consists of a rectangular frame welded from metal (such as angle steel or stainless steel) or a semi-circular frame adapted to the mixer 3, and a grid fixed inside the frame. The grid is composed of a series of parallel metal round steel, flat steel, or square steel bars. The grid can bear the weight of the raw material bag, allow granular raw materials to pass through smoothly, and intercept most of the lumps and packaging bag fragments. The feeding rack 31 is fixed to the discharge platform 2 by a bracket rather than directly to the mixer 3, so that the discharge platform 2 supports the weight of the feeding rack 31 and the bagged raw materials above it. The operator lifts the bagged raw materials from the material conveying mechanism 1 onto the feeding rack 31, placing it on the grid structure. Then, a knife is used to cut open the bottom of the raw material bag. Under the influence of gravity, loose, granular raw materials immediately pass through the gaps in the grid and fall into the mixer 3 below. Large lumps, clumps, and plastic bag fragments that may be present in the raw materials are intercepted by the grid on the load-bearing surface. After one feeding operation is completed, the operator can easily manually sweep away and collect the lumps and packaging bag fragments intercepted on the grid structure, thus completing a full feeding and pre-treatment operation. This utility model's feeding rack 31 integrates load-bearing, feeding, preliminary screening, and foreign object interception functions into one unit. Its structure is extremely simple, its cost is low, yet its effect is significant.

[0029] The feeding rack 31 of this utility model is detachably equipped with a screen for filtering large particulate impurities in the raw materials. After the bag is broken, the raw materials first fall onto the screen. Under gravity or with slight assistance from the operator, qualified fine particles of raw materials fall through the screen holes into the mixer, while all lumps and impurities larger than the mesh size are effectively intercepted on the screen. The screen is a planar rectangular structure, and its mesh size can be selected according to the characteristics of the raw materials, preferably 4 to 10 mesh, to effectively intercept lumps and impurities with a particle size greater than 2mm to 6mm. The screen is surrounded by a reinforced frame to increase strength and facilitate installation. The detachable connection method is preferably placement, sliding rail, or clamping. Placement specifically means that a limiting angle steel or sliding groove is provided on the grid or frame of the feeding rack 31 to support the screen. The screen can be placed directly on the supporting structure and positioned by gravity. Sliding rail specifically means that a pair of parallel sliding rails are installed on the frame of the feeding rack 31. The screen's side frames are embedded in slide rails, allowing it to be pushed in or pulled out horizontally like a drawer, facilitating operation in confined spaces. The clamping mechanism specifically involves quick-clamping clips or bolts on the feeding rack 31 frame. After the screen is placed in position, it is clamped and secured by rotating the clips or tightening the bolts, preventing displacement due to vibration during feeding.

[0030] The discharge port of the mixer 3 of this utility model is located directly above the storage silo 4. The mixer 3 is equipped with a discharge mechanism 32, which includes a discharge plate 321 for sealing the discharge port of the mixer 3, a vertical connecting rod 323 connected to the discharge plate 321, and a horizontal connecting rod 324 connected to the vertical connecting rod 323 and driving the discharge plate 321 to rotate to open and close the discharge port of the mixer 3. A sleeve 322 is provided on the outer wall of the mixer 3, and the vertical connecting rod 323 is rotatably inserted into the sleeve 322. A limiting retaining ring 326 adapted to the sleeve 322 is provided on the vertical connecting rod 323. The discharge plate 321 is a metal plate adapted to the shape and size of the discharge port at the bottom of the mixer 3, and its area is not less than the area of ​​the discharge port. The discharge plate 321 achieves the opening and closing of the discharge port by rotating in the horizontal plane. The horizontal connecting rod 324 is driven manually or mechanically, which in turn drives the vertical connecting rod 323 to rotate. The vertical connecting rod 323 is connected to the discharge plate 321, causing the discharge plate 321 and the vertical connecting rod 323 to form a rigid rocker arm component. This component drives the discharge plate 321 to rotate, thereby opening and closing the discharge port. During the mixing process, the discharge port is opened, and the mixed materials fall into the storage bin 4 below as they pass through the discharge port through the mixing action. The sleeve 322 is fixedly welded or bolted to the outer wall of the mixer 3, serving as a limit. The limiting ring 326 is used to limit the vertical connecting rod 323 in the vertical direction to prevent it from falling downwards. Preferably, the outer edge of the discharge plate 321 is provided with an upwardly extending wing plate 325 that is adapted to the outer wall of the mixer 3. The wing plate 325 is in contact with the outer wall of the mixer 3 when the discharge port of the mixer 3 is completely closed by the discharge plate 321. When the discharge port is closed, the wing plate 325 cooperates with the discharge plate 321 to form a dual sealing system of plane and vertical surfaces.

[0031] The secondary mixing device of this utility model includes a mixing shaft 41 located in the center of the storage silo 4 and multiple mixing blades 42 fixedly installed on the mixing shaft 41. The arrangement direction of the mixing blades 42 is adapted to the rotation direction of the spiral blades of the screw conveyor 5. The mixing shaft 41 rotates through a motor connected to it. The mixing blades 42 are not installed horizontally, but form a certain inclination angle (i.e., arrangement direction) with the axis of the mixing shaft 41. The inclination direction of the mixing blades 42 is adapted to the rotation direction of the spiral blades of the screw conveyor 5 installed below the discharge port of the storage silo 4. When the mixing shaft 41 of the secondary mixing device drives the mixing blades 42 to rotate, the blades not only agitate the material, but also, due to their specific inclination direction, give the material a continuous axial force, like a slow spiral pump, guiding the material to the discharge port as the mixing blades 42 rotate. At the same time, the screw conveyor 5 starts, and its spiral blades rotate in the same material flow direction, forcibly pushing the material out. The secondary mixing device fundamentally solves the common problems in the discharge process of storage silos (such as bridging, core extraction, and unstable discharge), ensuring that the composition and density of the finished product remain highly consistent from the first bag to the last bag, greatly improving the stability of product quality.

[0032] The storage silo 4 of this invention is provided with an observation window 43 on its wall. A circular or square through hole is opened on the side wall or the conical bottom wall of the storage silo 4. Operators or inspectors do not need to open the equipment; they can directly visually inspect the material level (the amount of material remaining in the silo), stirring status (whether the blades are rotating normally and whether the material flow is smooth), discharge status (whether there is normal material supply at the inlet of the screw conveyor and whether the material is blocked), and equipment abnormalities (abnormal lumps, foreign objects, or loose parts inside the silo).

[0033] The discharge platform 2 of this utility model is equipped with a staircase or ladder 21 leading to the ground. Operators can safely reach the working surface of the discharge platform 2 from the ground via the staircase or ladder 21 to perform operations such as receiving materials, feeding materials, and equipment inspection. After finishing their work, they can return to the ground via the ladder.

[0034] The mixer 3 of this invention has a protective railing 33 encircling the feed inlet, with both ends of the railing 33 fixed to the discharge platform 2. The railing 33 is perpendicular to the discharge platform 2 and is used to protect the safety of the operator. Preferably, the railing 33 is arranged around the feeding rack 31, with the middle of the railing 33 located above the feeding rack 31, and both sides fixed to the discharge platform 2. The railing 33 can further ensure the safety of the operator.

[0035] The secondary stirring device of this invention operates at a lower stirring speed than the mixer 3. The secondary stirring uses low-speed stirring, primarily to break up segregation, maintain homogeneity, and assist in material discharge. This invention also includes a crusher 6 for pre-treating raw materials before the material conveying mechanism 1. The raw materials processed by this system are solid powdery or granular water-soluble fertilizers containing macronutrients, mainly including urea, monoammonium phosphate, and potassium chloride. These raw materials are prone to absorbing moisture and clumping during storage and transportation, so they need to be pre-treated by crushing with a crusher, and then screened by a grid or screen on the feeding rack to completely eliminate lumps and large particles, ensuring uniform fineness of the raw materials from the source and meeting the quality control requirements for rapid and complete dissolution of water-soluble fertilizers.

[0036] The material conveying mechanism 1 of this utility model is a vertical elevator or an inclined conveyor belt. The vertical elevator mainly consists of a frame, a lifting belt (or chain), hoppers for receiving materials, a drive motor, and a reducer. The hoppers are fixed on the lifting belt or chain at certain intervals, forming a circulating lifting system. The bottom inlet of the vertical elevator is located on the ground, making it convenient for operators or feeding equipment to put raw materials in. After the drive motor starts, it drives the hoppers to move vertically or nearly vertically, and delivers them to a position at the same height as the discharge platform 2 through the discharge port. The material in the hoppers is thrown out under the action of gravity or centrifugal force, and is delivered to a position at the same height as the discharge platform 2 through the discharge port. The discharge of the vertical elevator at the top is completed automatically, without any manual intervention, which reflects the advantages of this utility model in improving production efficiency and reducing labor costs. The inclined conveyor belt mainly consists of a frame, a conveyor belt, idlers, drive rollers, redirecting rollers, and a drive motor. To ensure that the material does not slide down, the working surface of the conveyor belt can be equipped with transverse baffles or herringbone patterns. The conveyor belt is installed at a certain angle (usually not exceeding 30 degrees) through the frame. Its lower end is the feed end, located on the ground; its upper end is the discharge end, extending to the height of the discharge platform 2. The material is placed on the conveyor belt at the feed end, rises smoothly with the conveyor belt, and is thrown out or guided into the discharge platform 2 by a scraper when it reaches the top.

[0037] The screw conveyor 5 of this utility model is equipped with a weighing scale 7 at its outlet end. The operator hangs an empty packaging bag on the weighing platform (or bag clamp) of the weighing scale 7 and performs a tare operation. The screw conveyor 5 and the weighing scale 7 operate simultaneously at high speed, rapidly filling the packaging bag with material. When the weighing scale 7 detects that the weight of the material in the bag is close to the preset target value, the control unit of the weighing scale 7 immediately sends a signal to the motor of the screw conveyor 5. Upon receiving the signal, the screw conveyor 5 switches from high-speed operation to low-speed operation or jogging operation, replenishing the bag with material at an extremely slow speed. When the weight precisely reaches the preset target value, the control unit issues a command, and the screw conveyor 5 immediately stops rotating, achieving precise material cutting. Subsequently, the filled bag is removed, sealed, and replaced with an empty bag to begin the next cycle. The weighing scale 7 is preferably a screw weighing scale 7 or a weight-adding weighing scale 7.

[0038] The mixer, vertical elevator, conveyor belt, crusher, and weighing scale used in this utility model are all existing known electrical equipment, and all can be purchased and used directly on the market. Their structure, circuit, and control principle are all existing known technologies. Therefore, the structure, circuit, and control principle of the mixer, vertical elevator, conveyor belt, crusher, and weighing scale will not be described in detail here.

[0039] Finally, it should be noted that the above embodiments are merely preferred embodiments of this utility model used to illustrate the technical solutions of this utility model, and are not intended to limit it, nor are they intended to limit the patent scope of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model. That is to say, any changes or refinements made to the main design concept and spirit of this utility model that are not of substantial significance, but whose technical problems are still consistent with those of this utility model, should be included within the protection scope of this utility model. In addition, the direct or indirect application of the technical solutions of this utility model to other related technical fields are similarly included within the patent protection scope of this utility model.

Claims

1. A water-soluble fertilizer processing system, characterized in that, It includes a material conveying mechanism (1) for conveying raw materials from a first horizontal height to a second horizontal height, a discharge platform (2) with its working surface set at the second horizontal height, a mixer (3) set on one side of the discharge platform (2) for primary mixing of the raw materials, a storage silo (4) set below the discharge port of the mixer (3) for storing the mixed materials, and a screw conveyor (5) connected to the discharge port of the storage silo (4) for outputting the mixed materials; a secondary mixing device is provided inside the storage silo (4).

2. The water-soluble fertilizer processing system according to claim 1, characterized in that, The mixer (3) has a feeding rack (31) above the feed inlet for receiving raw materials. The feeding rack (31) is fixed on the discharge platform (2) by a bracket. The load-bearing surface of the feeding rack (31) is a grid structure.

3. The water-soluble fertilizer processing system according to claim 2, characterized in that, The feeding rack (31) is detachably equipped with a screen for filtering large particulate impurities in the raw materials.

4. The water-soluble fertilizer processing system according to claim 1, characterized in that, The discharge port of the mixer (3) is located directly above the storage bin (4). The mixer (3) is provided with a discharge mechanism (32). The discharge mechanism (32) includes a discharge plate (321) for sealing the discharge port of the mixer (3), a vertical connecting rod (323) connected to the discharge plate (321), and a horizontal connecting rod (324) connected to the vertical connecting rod (323) and driving the discharge plate (321) to rotate through the vertical connecting rod (323) to open and close the discharge port of the mixer (3). The outer wall of the mixer (3) is provided with a sleeve (322). The vertical connecting rod (323) rotates through the sleeve (322). The vertical connecting rod (323) is provided with a limiting ring (326) that is compatible with the sleeve (322).

5. The water-soluble fertilizer processing system according to claim 4, characterized in that, The outer edge of the discharge plate (321) is provided with an upwardly extending wing plate (325) that is adapted to the outer wall of the mixer (3). The wing plate (325) is in contact with the outer wall of the mixer (3) when the discharge port of the mixer (3) is completely closed by the discharge plate (321).

6. The water-soluble fertilizer processing system according to claim 1, characterized in that, The secondary mixing device includes a mixing shaft (41) located in the center of the storage silo (4) and multiple mixing blades (42) fixedly installed on the mixing shaft (41). The arrangement direction of the mixing blades (42) is adapted to the rotation direction of the spiral blades of the screw conveyor (5).

7. The water-soluble fertilizer processing system according to claim 1, characterized in that, The storage silo (4) has an observation window (43) on its wall; the discharge platform (2) has a staircase or ladder (21) leading to the ground; a guardrail (33) is installed above the feed inlet of the mixer (3), and the two ends of the guardrail (33) are fixed to the discharge platform (2).

8. The water-soluble fertilizer processing system according to claim 1, characterized in that, The stirring speed of the secondary stirring device is lower than that of the mixer (3).

9. A water-soluble fertilizer processing system according to claim 1, characterized in that, It also includes a crusher (6) for pre-processing raw materials before the material conveying mechanism (1), which is a vertical elevator or an inclined conveyor belt.

10. A water-soluble fertilizer processing system according to claim 1, characterized in that, A weighing scale (7) is installed at the outlet end of the screw conveyor (5).

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