Element water-soluble fertilizer production system

Abstract

The utility model relates to the technical field of water-soluble fertilizer production, in particular to an element water-soluble fertilizer production system which comprises a preparation tank, a solid inlet, a solution inlet pipe and a water supply pipe are respectively arranged at the top of the preparation tank, and a discharge port at the bottom of the preparation tank is connected with an inlet of a colloid mill through a first return pipe which is a steel wire hose. An outlet of the colloid mill is connected with a reflux inlet in the top of the preparation tank through a reflux pipe II; a discharge hole in the bottom of the preparation tank is connected with a water-soluble fertilizer filling machine through a positive displacement pump; the dust suction hood corresponds to the solid inlet and is connected with a dust treatment device through a dust removal pipeline; a jacket is arranged on the outer wall of the preparation tank; a medium inlet and a medium outlet are formed in the jacket; and a stirring mechanism is arranged in the preparation tank. According to the utility model, materials are dispersed more sufficiently and mixed more uniformly in the production of the element water-soluble fertilizer, and dust pollution is avoided.

Description

Technical Field

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

[0002] In modern agricultural production, element-based water-soluble fertilizers have become a core fertilizer category for achieving efficient fertilization in facility agriculture and cash crop cultivation due to their advantages of being fully water-soluble, easily absorbed, and able to precisely match the nutritional needs of crops. The core of preparing element-based water-soluble fertilizers is to fully mix solid and liquid raw materials in a specific ratio. The solid raw materials are mostly high-purity potassium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium nitrate, and chelated trace element salts, while the liquid raw materials often include urea ammonium nitrate solution, humic acid solution, and amino acid mother liquor. Through mixing, a uniform and stable liquid fertilizer or a rapidly dissolving solid granular fertilizer is formed to meet the needs of diverse application scenarios such as drip irrigation, sprinkler irrigation, and foliar spraying. However, current elemental water-soluble fertilizer production equipment mostly uses only a single paddle-type main agitator. The physical properties of solid and liquid raw materials in the elemental water-soluble fertilizer system differ significantly, easily leading to uneven mixing or insufficient agitation during mass production. While solid raw materials such as potassium dihydrogen phosphate and dipotassium hydrogen phosphate are readily soluble in water, their dissolution rates in urea ammonium nitrate solutions and humic acid solutions are greatly affected by temperature and agitation intensity. Humic acid solutions, containing colloidal components, have a higher viscosity than ordinary aqueous solutions and poorer fluidity. Existing agitators limit the agitation range to the central area of ​​the vessel, easily creating dead zones at the edges and bottom, causing solid raw materials to accumulate at the bottom and resulting in excessively high concentrations of solid particles in localized areas. Simultaneously, insufficient agitation in the mixing of urea ammonium nitrate solution and humic acid solution can easily lead to liquid stratification, ultimately resulting in uneven nutrient distribution in the prepared elemental water-soluble fertilizer, potentially causing localized nutrient excess or deficiency after application to crops.

[0003] Furthermore, in the preparation of elemental water-soluble fertilizers, some raw materials require sufficient shearing and dispersion to ensure effective mixing. If colloidal particles in humic acid solutions are not sufficiently sheared, they easily form micron-sized aggregates, leading to slight turbidity in the fertilizer solution and potential precipitation after long-term storage. When chelated trace element salts are mixed with liquid raw materials, insufficient shear strength can easily lead to the formation of high-concentration chelate salt solutions in localized areas, causing antagonistic reactions with other raw materials. Existing single-stirring mixing methods rely primarily on the fluid shear force generated by blade rotation, resulting in low shear strength and a limited range of action. This makes it impossible to specifically break down and disperse aggregates and high-concentration localized areas, leading to insufficient uniformity of the mixed material. This not only affects the clarity of the liquid water-soluble fertilizer but may also cause slow dissolution and residual fine particles in solid granular water-soluble fertilizers, clogging drip irrigation nozzles and increasing the risk of application failures in the field.

[0004] In summary, there is an urgent need for a mixing system for water-soluble element fertilizers that can adapt to the characteristics of the raw materials and take into account both protection and mixing effects, so as to meet the needs of modern agriculture for efficient and high-quality production of water-soluble element fertilizers. Utility Model Content

[0005] The technical problem to be solved by this utility model is to propose an element water-soluble fertilizer production system that enables materials to be more fully dispersed and mixed more evenly during the production of element water-soluble fertilizer, while avoiding dust pollution.

[0006] The elemental water-soluble fertilizer production system of this utility model includes a preparation tank. The top of the preparation tank is equipped with a solid inlet, a solution inlet pipe, and a water supply pipe. The bottom outlet of the preparation tank is connected to the inlet of a colloid mill via a return pipe (a flexible steel wire hose). The outlet of the colloid mill is connected to the return port at the top of the preparation tank via a second return pipe. The bottom outlet of the preparation tank is connected to a water-soluble fertilizer filling machine via a volumetric pump. The system also includes a dust extraction hood, which is correspondingly positioned to the solid inlet and connected to a dust treatment device via a dust removal pipe. The outer wall of the preparation tank is equipped with a jacket, on which a medium inlet and a medium outlet are located. The preparation tank contains a stirring mechanism, including a main stirrer and homogenizing dispersers and shearing dispersers located on either side of the main stirrer. The main stirrer includes a main stirring shaft with a main stirring paddle at its bottom, the paddle having a W-shaped structure. The homogenizing disperser includes a homogenizing shaft, a stator, and a rotor. The shearing disperser includes a shearing dispersion shaft and a shearing dispersion disc located at the bottom of the shearing dispersion shaft, with toothed blades arranged alternately along the outer edge of the shearing dispersion disc.

[0007] Preferably, a liquid level sensor is provided at the bottom of the preparation tank, and the liquid level sensor is electrically connected to the volumetric pump through a controller.

[0008] Preferably, the two arms of the W-shaped structure of the main stirring paddle extend vertically upward to the middle of the main stirring shaft and are connected by a connecting rod, and the homogenizer and shear disperser are located between the main stirring shaft and the side arms of the W-shaped structure of the main stirring paddle.

[0009] Preferably, the homogeneous shaft includes a fixed shaft and a moving shaft. The fixed shaft is fixedly connected to the stator, and the stator wall has a through hole. The moving shaft is fixedly connected to the rotor, and the rotor is located inside the stator and has a clearance fit with the stator.

[0010] Preferably, the main stirring shaft, the moving shaft, and the shearing and dispersing shaft are connected to the main motor, the homogenizing motor, and the shearing and dispersing motor, respectively.

[0011] Preferably, a number of second stirring rods are also provided on the main stirring shaft and the shear dispersion shaft, and the second stirring rods on the main stirring shaft and the shear dispersion shaft are staggered to avoid interference during stirring.

[0012] Preferably, the top outlet of the dust collection hood is connected to a dust treatment device via a dust collection duct, the dust treatment device including a wet scrubber and a fan. The dust collection hood is sequentially connected to the wet scrubber and the fan via the dust collection duct.

[0013] Preferably, the top of the preparation tank is connected to a humic acid inlet pipe, which is connected to a humic acid tank via a humic acid delivery pump; it also includes a collection tank, in which a pipe is provided to connect to the inlet of a collection submersible pump, and the outlet of the collection submersible pump is connected to the preparation tank via a collection reuse pipe.

[0014] Preferably, the bottom of the preparation tank is equipped with a turbulence mechanism. This mechanism includes a drive shaft fixedly connected to both ends of a main stirring shaft and the bottom of the preparation tank. A horizontally rotating drive bevel gear is mounted in the middle of the drive shaft, and a driven bevel gear is vertically meshed with it. The center of the driven bevel gear is fixedly connected to the turbulence shaft. The other end of the turbulence shaft is rotatably connected to the inner wall of the preparation tank. Several longitudinally arranged turbulence blades are provided on the turbulence shaft. This turbulence mechanism further enhances the mixing effect. The main stirring shaft drives the drive shaft to rotate, and the drive bevel gear drives the driven bevel gear to rotate, causing the turbulence shaft to drive the turbulence blades to rotate vertically, forming longitudinal turbulence at the bottom of the preparation tank. This, combined with the stirring of the main stirrer, forms a three-dimensional mixing system, further breaking down material stratification and improving overall mixing uniformity.

[0015] Preferably, the driving bevel gear and the driven bevel gear are externally equipped with gear boxes. The gear boxes are in sealed rotational engagement with the driving shaft and the turbulence shaft, which can prevent material from entering the gear meshing area, reduce gear wear, and extend the service life of the turbulence mechanism.

[0016] Valves can be installed on the pipeline as needed to control the flow of materials within the pipeline. The opening and closing of the valves can be used to conveniently control the flow of materials within the pipeline and to regulate the material flow rate.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. After initial stirring of the materials in the preparation tank, send them to the colloid mill for grinding. This can further grind and refine any insufficiently dispersed solid particles or agglomerates. After grinding, return the materials to the preparation tank for continued mixing to ensure that the materials reach the required fineness and improve product stability and solubility.

[0019] 2. The dust collection hood is connected to the dust treatment device through a dust collection pipe. Dust generated when solid raw materials are fed in can be captured by the dust collection hood in a timely manner, preventing dust from spreading into the production environment, protecting the health of operators, reducing dust pollution to equipment, and meeting environmental protection production requirements.

[0020] 3. The main agitator thoroughly mixes the materials in the preparation tank. The W-shaped structure of the main agitator paddle can cover most of the bottom and middle areas of the preparation tank. The homogenizer disperses the colloidal particles in the humic acid solution through the gap fit between the stator and rotor, breaking down micron-sized agglomerates. The shearing disperser has staggered toothed blades on the outer edge of the shearing and dispersing disc, which can specifically break up high-concentration local areas, avoiding antagonistic reactions between chelated trace element salts and other raw materials, and ultimately ensuring uniform distribution of water-soluble fertilizer nutrients. The main agitator shaft, moving shaft, and shearing and dispersing shaft are driven independently by the main motor, homogenizing motor, and shearing and dispersing motor, respectively. The speed of each agitator can be flexibly adjusted according to the material mixing requirements to adapt to the mixing process of different raw material ratios. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the element water-soluble fertilizer production system of this utility model;

[0022] Figure 2 This is a schematic diagram of the mixing tank structure;

[0023] In the diagram: 1. Preparation tank; 2. Solid inlet; 3. Solution inlet pipe; 4. Water supply pipe; 5. Return pipe one; 6. Colloid mill; 7. Return pipe two; 8. Volumetric pump; 9. Water-soluble fertilizer filling machine; 10. Dust hood; 11. Dust removal pipe; 12. Main stirring shaft; 13. Main stirring paddle; 14. Stator; 15. Shear dispersion shaft; 16. Shear dispersion disc; 17. Gear blade; 18. Liquid level sensor; 19. Stator 20. Shaft; 21. Moving shaft; 22. Perforated shaft; 23. Main motor; 24. Homogenizing motor; 25. Shearing and dispersing motor; 26. Second stirring rod; 27. Humic acid transfer pump; 28. Humic acid tank; 29. ​​Collection tank; 30. Collection submersible pump; 31. Collection return pipe; 32. Driving shaft; 33. Driving bevel gear; 34. Turbulent shaft; 35. Turbulent blades; 36. Gearbox. Detailed Implementation

[0024] The present invention will now be described clearly and completely with reference to the accompanying drawings.

[0025] Example 1

[0026] like Figure 1As shown, the elemental water-soluble fertilizer production system includes a preparation tank 1. The top of the preparation tank 1 is equipped with a solid inlet 2, a solution inlet pipe 3, and a water supply pipe 4. The bottom outlet of the preparation tank 1 is connected to the inlet of a colloid mill 6 via a return pipe 5 (a flexible steel wire hose). The outlet of the colloid mill 6 is connected to the return port at the top of the preparation tank 1 via a second return pipe 7. The bottom outlet of the preparation tank 1 is connected to a water-soluble fertilizer filling machine 9 via a volumetric pump 8. It also includes a dust suction hood 10, which is correspondingly positioned to the solid inlet 2. The dust suction hood 10 is connected to a dust treatment device via a dust removal pipe 11. The outer wall of the preparation tank 1 is equipped with a jacket, on which a media inlet and a media outlet are located. Figure 2 As shown, the preparation tank 1 is equipped with a stirring mechanism, which includes a main stirrer, and a homogenizer and a shearing disperser located on both sides of the main stirrer. The main stirrer includes a main stirring shaft 12, and a main stirring paddle 13 is provided at the bottom of the main stirring shaft 12. The main stirring paddle 13 has a W-shaped structure. The homogenizer includes a homogenizing shaft, a stator 14 and a rotor. The shearing disperser includes a shearing dispersion shaft 15 and a shearing dispersion disk 16 located at the bottom of the shearing dispersion shaft 15. The outer edge of the shearing dispersion disk 16 is provided with toothed blades 17 arranged alternately.

[0027] A liquid level sensor 18 is provided at the bottom of the preparation tank 1. The liquid level sensor 18 is electrically connected to the volumetric pump 8 through a controller.

[0028] The two arms of the main stirring paddle 13W-type structure extend vertically upward to the middle of the main stirring shaft 12 and are connected by a connecting rod. The homogenizer and shearing disperser are located between the main stirring shaft 12 and the side arms of the main stirring paddle 13W-type structure.

[0029] The homogeneous shaft includes a fixed shaft 19 and a moving shaft 20. The fixed shaft 19 is fixedly connected to the stator 14. The stator 14 has a through hole 21 in its wall. The moving shaft 20 is fixedly connected to the rotor. The rotor is located inside the stator 14 and is clearance-fitted with the stator 14.

[0030] The main stirring shaft 12, the moving shaft 20, and the shearing and dispersing shaft 15 are respectively connected to the main motor 22, the homogenizing motor 23, and the shearing and dispersing motor 24.

[0031] The main stirring shaft 12 and the shearing and dispersing shaft 15 are also provided with a number of second stirring rods 25. The second stirring rods 25 on the main stirring shaft 12 and the shearing and dispersing shaft 15 are staggered to avoid interference during stirring.

[0032] Based on Example 1, such as Figure 1 As shown, the top of the preparation tank 1 is connected to a humic acid inlet pipe, which is connected to the humic acid tank 27 via a humic acid delivery pump 26; it also includes a collection tank 28, which is equipped with a pipe connected to the inlet of a collection submersible pump 29, and the outlet of the collection submersible pump 29 is connected to the preparation tank 1 via a collection reuse pipe 30.

[0033] The working process is as follows: According to the production formula, water is injected into the preparation tank 1 through the water supply pipe 4, and liquid raw materials such as urea ammonium nitrate solution are injected through the solution inlet pipe 3; the dust treatment device is started, and solid raw materials such as potassium dihydrogen phosphate, dipotassium hydrogen phosphate, and chelated trace element salts are added into the preparation tank 1 through the solid inlet 2. During the addition process, the dust collection hood 10 captures the dust and prevents the dust from spreading.

[0034] Start the main motor 22 and the shearing and dispersing motor 24. The main motor 22 drives the main stirring shaft 12 to rotate, and the W-shaped main stirring paddle 13 stirs the material. At the same time, the second stirring rod 25 on the main stirring shaft 12 assists in the stirring. The shearing and dispersing motor 24 drives the shearing and dispersing shaft 15 to rotate. The toothed blades 17 of the shearing and dispersing disc 16 shear and crush the solid material. The second stirring rod 25 on the shearing and dispersing shaft 15 rotates alternately with the second stirring rod 25 on the main stirring shaft 12 to avoid interference and form a three-dimensional stirring system to fully mix the material. During the stirring process, the speed of each motor can be adjusted according to the state of the material. After mixing and dispersing for a certain period of time, the humic acid delivery pump 26 is started to transport the humic acid solution in the humic acid tank 27 to the preparation tank 1 through the humic acid inlet pipe. The homogenizing motor 23 is started to drive the rotating shaft 20 to rotate. The rotor rotates at high speed in the stator 14 to draw the material into the stator 14. Then the centrifugal force of the rotor pushes the material out of the stator 14. The material is squeezed out through the perforation 21. The squeezed material mixes with the material outside the stator 14. In this process, the material is rapidly sheared between the rotor and the stator 14. This process is repeated, and fresh material is continuously drawn in, sheared, and mixed in a cycle, so that the colloidal particles in the humic acid solution are finely dispersed.

[0035] After the material has been initially stirred for a period of time, open the valve between the bottom outlet of the preparation tank 1 and the return pipe 5. Under the action of gravity, the material enters the colloid mill 6 through the return pipe 5. Start the colloid mill 6 to grind and refine the material. The ground material returns to the preparation tank 1 through the return pipe 7 to continue to participate in the stirring and mixing. Control the number of cycles of grinding according to the fineness requirements of the material. After the requirements are met, close the valves on the colloid mill 6, the return pipe 5, and the return pipe 7.

[0036] The liquid level sensor 18 monitors the liquid level of the material in the preparation tank 1 in real time. When the material is mixed and the liquid level reaches the set filling level, the controller controls the volumetric pump 8 to start and open the valve between the bottom outlet of the preparation tank 1 and the volumetric pump 8. The material is then transported to the water-soluble fertilizer filling machine 9 for quantitative filling. If the liquid level sensor 18 detects that the liquid level is lower than the set lower limit during the filling process, the controller immediately controls the volumetric pump 8 to stop working to avoid dry running.

[0037] Overflow and residual liquid generated during production flow into the collection tank 28. When the liquid in the collection tank 28 reaches a certain amount during the production break, the liquid collection submersible pump 29 is started, and the valve on the liquid collection and reuse pipe 30 is opened to transport the liquid in the collection tank 28 to the preparation tank 1 through the liquid collection and reuse pipe 30 to achieve recycling.

[0038] Example 2

[0039] Based on Embodiment 1, the top outlet of the dust collection hood 10 is connected to a dust treatment device via a dust collection pipe 11. The dust treatment device includes a wet scrubber and a fan. The dust collection hood 10 is sequentially connected to the wet scrubber and the fan via the dust collection pipe 11.

[0040] When solid raw materials are fed into the solid inlet 2 and dust is generated, the fan is started. The fan creates negative pressure in the dust removal pipe, and the dust suction hood 10 sucks in the dust. The dust is carried by the airflow through the dust removal pipe 11 into the wet dust collector. The water or other dust removal liquid in the wet dust collector comes into full contact with the dust, and the dust is adsorbed in the liquid. The purified gas is discharged by the fan, avoiding direct dust emission and environmental pollution.

[0041] Example 3

[0042] Based on Example 1, such as Figure 2 As shown, the bottom of the preparation tank 1 is equipped with a turbulence mechanism, which includes a drive shaft 31 that is fixedly connected to the main stirring shaft 12 at both ends and the bottom of the preparation tank 1, respectively. A drive bevel gear 32 that rotates laterally is installed in the middle of the drive shaft 31. The drive bevel gear 32 is vertically meshed with a driven bevel gear 33. The center of the driven bevel gear 33 is fixedly connected to a turbulence shaft 34. The other end of the turbulence shaft 34 is rotatably connected to the inner wall of the preparation tank 1. Several turbulence blades 35 are provided on the turbulence shaft 34. A gear box 36 is provided outside the drive bevel gear 32 and the driven bevel gear 33.

[0043] After the main motor 22 is started, the main motor 22 drives the main stirring shaft 12 to rotate. The main stirring shaft 12 simultaneously drives the active rotating shaft 31 to rotate. The active bevel gear 32 on the active rotating shaft 31 rotates laterally. Since the active bevel gear and the driven bevel gear 33 of the 32 mesh perpendicularly, the driven bevel gear 33 drives the turbulence shaft 34 to rotate. The turbulence blades 35 on the turbulence shaft 34 rotate longitudinally at the bottom of the preparation tank 1, forming turbulence. At this time, the stirring of the main stirrer and the turbulence of the turbulence mechanism form a three-dimensional stirring system, which further enhances the material mixing effect, shortens the mixing time, and improves the mixing uniformity.

Claims

1. A system for producing water-soluble fertilizers, characterized in that, The system includes a preparation tank (1), with a solid inlet (2), a solution inlet (3), and a water supply pipe (4) at the top. The bottom outlet of the preparation tank (1) is connected to the inlet of a colloid mill (6) via a return pipe (5), and the outlet of the colloid mill (6) is connected to the return port at the top of the preparation tank (1) via a return pipe (7). The bottom outlet of the preparation tank (1) is connected to a water-soluble fertilizer filling machine (9) via a volumetric pump (8). The system also includes a dust hood (10), which is correspondingly set to the solid inlet (2). The dust hood (10) is connected to a dust treatment device via a dust removal pipe (11). The outer wall of the preparation tank (1) The preparation tank (1) is equipped with a jacket, which has a medium inlet and a medium outlet. The mixing tank (1) is equipped with a stirring mechanism, which includes a main stirrer and a homogenizer and a shearing disperser located on both sides of the main stirrer. The main stirrer includes a main stirring shaft (12), and a main stirring paddle (13) is located at the bottom of the main stirring shaft (12). The main stirring paddle (13) has a W-shaped structure. The homogenizer includes a homogenizing shaft, a stator (14) and a rotor. The shearing disperser includes a shearing dispersion shaft (15) and a shearing dispersion disk (16) located at the bottom of the shearing dispersion shaft (15). The outer edge of the shearing dispersion disk (16) is provided with toothed blades (17) arranged alternately.

2. The elemental water-soluble fertilizer production system according to claim 1, characterized in that, The preparation tank (1) is equipped with a liquid level sensor (18) at the bottom, and the liquid level sensor (18) is electrically connected to the volumetric pump (8) through a controller.

3. The elemental water-soluble fertilizer production system according to claim 1, characterized in that, The two arms of the W-shaped structure of the main stirring paddle (13) extend vertically upward to the middle of the main stirring shaft (12) and are connected by a connecting rod. The homogenizer and shearing disperser are located between the main stirring shaft (12) and the side arms of the W-shaped structure of the main stirring paddle (13).

4. The elemental water-soluble fertilizer production system according to claim 1, characterized in that, The homogeneous shaft includes a fixed shaft (19) and a moving shaft (20). The fixed shaft (19) is fixedly connected to the stator (14). The stator (14) wall has a through hole (21). The moving shaft (20) is fixedly connected to the rotor. The rotor is located inside the stator (14) and has a clearance fit with the stator (14).

5. The elemental water-soluble fertilizer production system according to claim 1, characterized in that, The main stirring shaft (12), the moving shaft (20) and the shearing and dispersing shaft (15) are respectively connected to the main motor (22), the homogenizing motor (23) and the shearing and dispersing motor (24).

6. The elemental water-soluble fertilizer production system according to claim 1, characterized in that, Several second stirring rods (25) are also provided on the main stirring shaft (12) and the shear dispersion shaft (15), and the second stirring rods (25) on the main stirring shaft (12) and the shear dispersion shaft (15) are arranged alternately.

7. The elemental water-soluble fertilizer production system according to claim 1, characterized in that, The top outlet of the dust hood (10) is connected to the dust treatment device via a dust removal pipe (11).

8. The elemental water-soluble fertilizer production system according to claim 1, characterized in that, The top of the preparation tank (1) is connected to a humic acid inlet pipe, which is connected to a humic acid tank (27) via a humic acid delivery pump (26); it also includes a collection tank (28), which is equipped with a pipe connected to the inlet of a collection submersible pump (29), and the outlet of the collection submersible pump (29) is connected to the preparation tank (1) via a collection recycling pipe (30).

9. The elemental water-soluble fertilizer production system according to claim 1, characterized in that, The bottom of the preparation tank (1) is provided with a turbulence mechanism. The turbulence mechanism includes an active rotating shaft (31) that is fixedly connected to the main stirring shaft (12) at both ends and the bottom of the preparation tank (1). A transversely rotating active bevel gear (32) is installed in the middle of the active rotating shaft (31). The active bevel gear (32) is vertically meshed with a driven bevel gear (33). The center of the driven bevel gear (33) is fixedly connected to the turbulence shaft (34). The other end of the turbulence shaft (34) is rotatably connected to the inner wall of the preparation tank (1). Several turbulence blades (35) are provided on the turbulence shaft (34).

10. The elemental water-soluble fertilizer production system according to claim 9, characterized in that, The driving bevel gear (32) and the driven bevel gear (33) are provided with gearboxes (36) on the outside.

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