An organic-inorganic combined water-soluble fertilizer fermentation device

Abstract

This utility model discloses an organic-inorganic combined water-soluble fertilizer fermentation device, belonging to the field of fertilizer fermentation technology. It includes a fermentation tank and a mixing tank. A delivery pump is fixedly connected to the outlet of the fermentation tank via a pipeline. A dynamic coupling mixing module is fixedly connected to the other end of the delivery pump. The other end of the dynamic coupling mixing module is fixedly connected to the inlet of the mixing tank via a pipeline. The dynamic coupling mixing module includes a drum filter, a venturi tube, and a homogenizer. This utility model achieves machine-free cleaning of the cylindrical filter screen by using a drum filter, eliminating production stoppages caused by filter clogging. Simultaneously, the venturi tube, in conjunction with the homogenizer, achieves uniform mixing of organic and inorganic materials, completely eliminating the possibility of clumping and effectively improving the quality and stability of the final product.

Description

Technical Field

[0001] This utility model belongs to the field of fertilizer fermentation technology, specifically relating to a water-soluble fertilizer fermentation device that combines organic and inorganic processes. Background Technology

[0002] Currently, the production process of organic and inorganic water-soluble fertilizers generally adopts a two-step process of "fermentation followed by mixing." This involves first fermenting organic raw materials in a fermentation tank using microorganisms, and then transferring the fermentation broth to a mixing tank to mix with inorganic nutrients. While this method avoids the inhibition of fermentation microorganisms by a high-salt environment, in actual production operations, especially in the critical stages of material transfer and mixing, there are still long-standing technical bottlenecks that have not been effectively resolved. These bottlenecks manifest in the following two aspects: 1. The problem of easy clogging during the transfer of organic fermentation broth: The fermentation broth formed after the fermentation of organic materials usually contains a large amount of incompletely decomposed viscous solid residues such as fibers, colloids, and mycelia. During the transfer of fermented organic materials, the high-viscosity fermentation broth rapidly forms a dense filter cake on the filter screen surface, causing a sharp narrowing of the flow channel and a rapid increase in system pressure. Operators must frequently stop the machine to disassemble and manually clean or replace the filter element, resulting in intermittent production, low automation, and severely limited production efficiency. 2. The problem of easy clumping of inorganic powder raw materials before mixing: During the mixing stage, powdered inorganic raw materials need to be added to liquid organic fermentation liquid. With existing feeding methods, the hydrophobic powder particles are immediately wetted and coated with a high-viscosity slurry film upon contact with the liquid surface, making it difficult for the dry powder inside the particles to continue contact with the liquid, thus forming "clumps." These two points not only prolong mixing time and increase energy consumption, but also lead to poor product uniformity, becoming potential factors for sedimentation and drip head clogging in the final product during storage and drip irrigation applications, directly affecting the "fully water-soluble" characteristic of water-soluble fertilizers.

[0003] Therefore, developing a water-soluble fertilizer fermentation device that can achieve efficient and continuous self-cleaning filtration of fermentation broth and instantaneous and uniform dispersion and wetting of inorganic powders is a key technical challenge to improve the continuity of organic-inorganic water-soluble fertilizer production and product quality. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a water-soluble fertilizer fermentation device that combines organic and inorganic processes.

[0005] To achieve the above objectives, the technical solution of this utility model is: an organic-inorganic combined water-soluble fertilizer fermentation device, including a fermentation tank and a mixing tank. A conveying pump is fixedly connected to the outlet of the fermentation tank through a pipeline. A dynamic coupling mixing module is fixedly connected to the other end of the conveying pump. The other end of the dynamic coupling mixing module is fixedly connected to the inlet of the mixing tank through a pipeline. The dynamic coupling mixing module includes a drum filter, a venturi tube, and a homogenizer.

[0006] Through the above technical solution: after the organic materials are fermented in the fermentation tank, the inorganic materials are filtered through the dynamic coupling mixing module, and after being mixed evenly, they are mixed in the mixing tank to achieve the combination of organic and inorganic materials without affecting each other's fermentation effect. The fermentation first and then mixing effectively improves the fermentation degree and product quality of water-soluble fertilizer.

[0007] As a further embodiment of this utility model: a fermentation liquid inlet is provided at one end of the drum filter near the delivery pump, the fermentation liquid inlet is connected to the delivery pump through a pipe, a cylindrical filter screen is rotatably connected inside the drum filter, the direction of the fermentation liquid inlet is tangent to the outer wall of the cylindrical filter screen, a first drive motor is fixedly connected at one end of the cylindrical filter screen near the fermentation liquid inlet, and an outlet end cap is fixedly connected at one end of the drum filter away from the first drive motor, the outlet end cap is connected to a venturi tube through a pipe.

[0008] The above technical solution involves a liquid outlet cap with a central mounting hole and an outer annular passage that allows the filtered fermentation liquid to flow out. The tangential fermentation liquid inlet utilizes centrifugal force to make it easier for solids to be thrown toward the filter screen, reducing the vertical impact on the filter screen, improving filtration efficiency, and assisting in the formation of a uniform filter cake.

[0009] As a further embodiment of this utility model: a backwash pipe is fixedly installed inside the drum filter. The backwash pipe is fixedly installed at the liquid outlet end cap and extends into the cylindrical filter screen. Several flushing ports are evenly opened axially on the backwash pipe. The outer wall of the drum filter is provided with a downwardly contracting slag collection trough. A slag discharge port is opened at the bottom of the slag collection trough. A slag discharge valve is fixedly installed at the slag discharge port.

[0010] The above technical solution involves using a backwash pipe to wash the filter cake formed by solid filter residue on a cylindrical filter screen, and a combination of a conical slag collection trough and a slag discharge valve to create a reliable slag discharge mechanism that allows for settling before discharge. This mechanism enables the loose filter residue stripped from the backwash to settle at the bottom, thereby discharging high-concentration slurry with minimal liquid entrainment, greatly reducing the effective loss of fermentation broth, and preventing frequent opening and closing of the slag discharge valve.

[0011] As a further embodiment of this utility model: an electromagnetic booster pump is connected to the backwash pipe, and the electromagnetic booster pump is connected to the pipe connected to the liquid outlet cap through a pipe.

[0012] The above technical solution involves connecting an electromagnetic booster pump to a control system, which controls the backwashing pipe to periodically self-clean the cylindrical filter screen. The filtered fermentation broth is used as the backwashing medium for the backwashing pipe, avoiding the use of clean water or other media that could affect the fermentation broth.

[0013] As a further embodiment of this utility model: a differential pressure sensor is fixedly installed inside the drum filter, and the differential pressure sensor is fixedly installed on both the inner and outer sides of the cylindrical filter screen.

[0014] Through the above technical solution: the differential pressure sensor is electrically connected to the control system. When the pressure difference between the inside and outside of the cylindrical filter screen reaches a certain level, the control system controls the electromagnetic booster pump to open so that the backwash pipe can flush the filter cake on the cylindrical filter screen.

[0015] As a further embodiment of this utility model, a feeding hopper is fixedly connected to the throat of the venturi tube.

[0016] Through the above technical solution: the feeding hopper can be used with a feeding pump or other feeders to add inorganic powder. When the fluid flows through the throat of the venturi tube, the flow rate increases and the fluid pressure decreases, forming a negative pressure, which can automatically and evenly draw the powder into the fluid, realizing the pneumatic conveying and premixing of the powder.

[0017] As a further embodiment of this utility model: the homogenizer includes a housing, a stator and a rotor, a plurality of shearing teeth are fixedly connected to the rotor and the stator, the stator is interference-fitted to the housing, the rotor is rotatably connected to the housing, the rotor is located in the inner hole of the stator, and the rotor input end is fixedly connected to the second drive motor.

[0018] Through the above technical solution, the fluid containing the pre-mixed powder coming out of the venturi tube is immediately drawn into the gap between the stator and the rotor. Under the huge shear force, high-speed impact and cavitation effect, the tiny "clumps" that have just been wetted and may have formed are completely torn apart, dispersed and homogenized in a very short time, forming an extremely uniform suspension.

[0019] As a further embodiment of this utility model: a stirrer, an aeration system, a temperature sensor, and a dissolved oxygen sensor are fixedly installed inside the fermentation tank. A third drive motor is fixedly connected to the input end of the stirrer. The aeration system is fixedly installed at the bottom of the fermentation tank. The temperature sensor and the dissolved oxygen sensor are fixedly installed on the inner wall side of the fermentation tank. A stirring device, a pH sensor, and a conductivity sensor are fixedly installed inside the mixing tank. A fourth drive motor is fixedly connected to the input end of the stirring device. The pH sensor and the conductivity sensor are both circumferentially and evenly installed on the inner wall side of the mixing tank.

[0020] Through the above technical solution, organic materials are fermented in the most suitable environment in the fermentation tank. After fermentation, the fermentation liquid is filtered by the dynamic coupling mixing module and mixed with inorganic materials before entering the mixing tank for further mixing, thereby realizing the fermentation of water-soluble fertilizer that combines organic and inorganic materials.

[0021] Compared with the prior art, the present invention has the following beneficial effects: 1. The rotary drum filter enables the cleaning of the cylindrical filter screen without shutdown, and the addition of an external backwash pipe for the filtered fermentation broth achieves a self-cleaning effect. Solid residues are continuously stripped and discharged, ensuring a stable flow and pressure for the transfer of fermentation broth. This eliminates production stoppages caused by filter blockage at the source and ensures the clarity of the broth entering subsequent processes. The device's own filtered liquid is used as the backwash medium, achieving a closed-loop cleaning process with zero pollution and zero dilution, saving water and preserving all the effective components of the product.

[0022] 2. By linking the feed hopper and homogenizer at the venturi tube, dispersion is completed the instant the powder comes into contact with the liquid. The powder is uniformly drawn into the high-speed liquid flow under negative pressure and immediately forced through a high-shear gap, where it is broken, wetted, and homogenized in a very short time, completely eliminating the possibility of agglomeration. The final product solution has excellent stability and no visible precipitation is observed during long-term storage at room temperature, effectively improving the quality of the final product.

[0023] 3. The dynamic coupling mixing head itself is an independent functional module that solves the common problem of "solid-liquid filtration" and "instantaneous homogenization of liquid and solid". It can be used not only in water-soluble fertilizer production lines, but also in other production processes that require solid-liquid filtration and mixing, which greatly enhances the technical value and market potential of this utility model. Attached Figure Description

[0024] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of the dynamic coupling mixing module in this utility model; Figure 3 This is a cross-sectional view of the dynamically coupled mixing module in this utility model.

[0025] Explanation of reference numerals in the attached figures: 1. Fermentation tank; 2. Mixing tank; 3. Transfer pump; 4. Rotary drum filter; 41. Fermentation broth inlet; 42. Cylindrical filter screen; 43. First drive motor; 44. Liquid outlet cap; 45. Backwash pipe; 46. Electromagnetic booster pump; 47. Slag collection tank; 48. Slag discharge port; 49. Slag discharge valve; 5. Venturi tube; 51. Feed hopper; 6. Homogenizer; 61. Outer shell; 62. Stator; 63. Rotor; 64. Second drive motor; 65. Shearing teeth. Specific Implementation

[0026] The following will be combined with the appendix Figures 1-3 The technical solution of this utility model has been clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] See appendix Figures 1-3 An organic-inorganic water-soluble fertilizer fermentation device includes a fermentation tank 1 and a mixing tank 2. The discharge port of the fermentation tank 1 is fixedly connected to a conveying pump 3 through a pipeline. The other end of the conveying pump 3 is fixedly connected to a dynamic coupling mixing module. The other end of the dynamic coupling mixing module is fixedly connected to the inlet of the mixing tank 2 through a pipeline. The dynamic coupling mixing module includes a drum filter 4, a venturi tube 5, and a homogenizer 6.

[0028] In this embodiment: the organic material is first fermented separately in fermentation tank 1 to a certain extent, then filtered through a dynamic coupling mixing module to obtain a fermentation broth free of solid impurities. This broth is then mixed with inorganic materials and further mixed and fermented in mixing tank 2, ultimately yielding a water-soluble fertilizer product that meets the requirements, is completely soluble in water, and is fully fermented. The rotary drum filter 4 is mainly responsible for filtering the fermentation broth, while the venturi tube 5, in conjunction with the homogenizer 6, ensures that the inorganic material powder is evenly mixed with the filtered fermentation broth, preventing clumping.

[0029] See appendix Figures 1-3 The drum filter 4 has a fermentation broth inlet 41 at one end near the delivery pump 3. The fermentation broth inlet 41 is connected to the delivery pump 3 through a pipe. A cylindrical filter screen 42 is rotatably connected inside the drum filter 4. The direction of the fermentation broth inlet 41 is tangent to the outer wall of the cylindrical filter screen 42. A first drive motor 43 is fixedly connected to one end of the cylindrical filter screen 42 near the fermentation broth inlet 41. An outlet end cap 44 is fixedly connected to one end of the drum filter 4 away from the first drive motor 43. The outlet end cap 44 is connected to the Venturi tube 5 through a pipe.

[0030] In this embodiment: the fermentation broth containing solid impurities enters the rotary drum filter 4 through the fermentation broth inlet 41. The fermentation broth inlet 41, with its specially designed position, utilizes swirling centrifugal force to reduce the impact on the filter screen. The first drive motor 43 is equipped with a support base and connected to an external power supply according to installation requirements. The first drive motor 43 drives the cylindrical filter screen 42 to rotate. The solid impurities are blocked on the outside of the cylindrical filter screen 42, and the fermentation broth flows out from the inside of the cylindrical filter screen 42.

[0031] See appendix Figures 1-3 A backwash pipe 45 is fixedly installed inside the drum filter 4. The backwash pipe 45 is fixedly installed at the liquid outlet end cap 44 and extends into the cylindrical filter screen 42. Several flushing ports are evenly opened axially on the backwash pipe 45. The outer wall of the drum filter 4 is provided with a downwardly contracting slag collection trough 47. A slag discharge port 48 is opened at the bottom of the slag collection trough 47. A slag discharge valve 49 is fixedly installed at the slag discharge port 48.

[0032] In this embodiment, a backwash pipe 45 is installed in the middle of the outlet cap 44. The backwash pipe 45 is supplied with backwashing medium, which washes the filter residue on the outside of the cylindrical filter screen 42, peeling it off and achieving self-cleaning of the cylindrical filter screen 42. The medium connected to the backwash pipe 45 comes from the filtered fermentation broth, preventing contamination or dilution of the fermentation broth by the backwashing medium. The flushed solid filter residue settles into the slag collection tank 47 under gravity. The slag discharge valve 49 is electrically connected to the control system. After the backwash pipe 45 stops flushing for a period of time, the slag discharge valve 49 is quickly opened to discharge the solid filter residue, minimizing fermentation broth loss while ensuring product quality and continuous system operation.

[0033] See appendix Figures 1-3 The backwash pipe 45 is connected to an external electromagnetic booster pump 46. The electromagnetic booster pump 46 is connected to the outlet end cap 44 via a pipe. A differential pressure sensor is fixedly installed inside the drum filter 4. The differential pressure sensor is fixedly installed on both the inner and outer sides of the cylindrical filter screen 42.

[0034] In this embodiment: the electromagnetic booster pump 46 is electrically connected to the control system. When the pressure difference between the inside and outside of the cylindrical filter screen 42 reaches a certain value, it indicates that the filter residue has clogged the cylindrical filter screen 42, affecting the filtration of the fermentation liquid. At this time, the control system receives a signal and controls the opening of the electromagnetic booster valve to clean the cylindrical filter screen 42 with the filtered fermentation liquid.

[0035] See appendix Figures 1-3 A feeding hopper 51 is fixedly connected to the throat of the venturi tube 5.

[0036] In this embodiment: when the fluid flows through the throat of the venturi tube 5, the flow velocity increases and the fluid pressure decreases, forming a negative pressure. Powdered inorganic materials are added to it through the feeding hopper 51. The negative pressure of the fluid can automatically and evenly draw the powder into the fluid, realizing the pneumatic conveying and premixing of the powder.

[0037] See appendix Figures 1-3 The homogenizer 6 includes a housing 61, a stator 62 and a rotor 63. Several shearing teeth 65 are fixedly connected to the rotor 63 and the stator 62. The stator 62 is interference-fitted to the housing 61, and the rotor 63 is rotatably connected to the housing 61. The rotor 63 is located in the inner hole of the stator 62, and the input end of the rotor 63 is fixedly connected to the second drive motor 64.

[0038] In this embodiment: the rotor 63 and the outer casing 61 are rotatably connected by bearings. The annular gap between the input end of the rotor 63 and the outer casing 61 is mechanically sealed to prevent fluid leakage axially from the seal. The venturi tube 5 is connected to the outer casing 61 via a pipe. The rotor 63 rotates at high speed under the action of the second drive motor 64, driving the shearing teeth 65 to rotate at high speed. The fermentation broth containing inorganic materials enters the gap between the stator 62 and the rotor 63. This gap has high shearing force, which thoroughly crushes and homogenizes the powdery materials in the fermentation broth. The second drive motor 64 is equipped with a support base and connected to an external power supply according to installation requirements.

[0039] See appendix Figures 1-3 Fermentation tank 1 is equipped with a stirrer, an aeration system, a temperature sensor, and a dissolved oxygen sensor. The input end of the stirrer is fixedly connected to a third drive motor. The aeration system is fixedly installed at the bottom of fermentation tank 1. The temperature sensor and dissolved oxygen sensor are fixedly installed on the inner wall side of fermentation tank 1. Mixing tank 2 is equipped with a stirring device, a pH sensor, and a conductivity sensor. The input end of the stirring device is fixedly connected to a fourth drive motor. The pH sensor and conductivity sensor are evenly installed on the inner wall side of mixing tank 2 around the periphery.

[0040] In this embodiment: the stirrer in fermenter 1 agitates the organic material being fermented in fermenter 1, and works in conjunction with the aeration system, temperature sensor, and dissolved oxygen sensor to ensure the environment required for the fermentation of the organic material. The organic material ferments in the most suitable environment in fermenter 1. The fermented liquid is filtered through a dynamic coupling mixing module and mixed with inorganic materials before entering mixing tank 2 for further mixing. The stirring device in mixing tank 2 promotes the mixing reaction of organic and inorganic materials. In conjunction with pH sensor and conductivity sensor, the fermentation of water-soluble fertilizer combining organic and inorganic materials is realized. The temperature sensor, dissolved oxygen sensor, pH sensor, and conductivity sensor are all electrically connected to the control system. The above sensors, fermenter 1, mixing tank 2, stirrer, and stirring device are mature existing technologies and will not be described in detail.

[0041] During assembly, fermenter 1 is connected to transfer pump 3 via a pipe, and transfer pump 3 is connected to fermentation broth inlet 41 via a pipe. Mixing tank 2 is connected to the other end of the dynamic coupling mixing module via a pipe. In use, the fermentation broth containing solids after fermentation of organic materials in fermenter 1 flows through drum filter 4 via transfer pump 3, becoming fermentation broth without solid impurities. It then passes through venturi tube 5, and inorganic materials are periodically added to the fermentation broth through feeding hopper 51 at the throat of venturi tube 5. The negative pressure generated by the special shape of venturi tube 5 draws the inorganic materials into the fluid and initially mixes them. The fermentation broth mixed with inorganic powder enters homogenizer 6, where it is thoroughly mixed and homogenized under the action of shearing teeth 65 on the surface of stator 62 and rotor 63 and the huge shearing force generated by the rotation of rotor 63. Finally, it enters the mixing tube for further fermentation, mixing, and storage. When the pressure difference between the inside and outside of the cylindrical filter screen 42 of the rotary drum filter 4 reaches a certain level, the control system controls the solenoid valve to open. The solenoid valve draws the filtered fermentation liquid into the backwash pipe 45 to wash the solid filter residue on the cylindrical filter screen 42. The solid filter residue settles into the conical slag collection tank 47. After a period of settling, the control system controls the slag discharge valve 49 to open, so that the solid filter residue is discharged from the slag discharge port 48, thus realizing the self-cleaning of the rotary drum filter 4.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and inventive features disclosed herein.

Claims

1. An organic-inorganic combined water-soluble fertilizer fermentation device, comprising a fermentation tank (1) and a mixing tank (2), characterized in that: The discharge port of the fermentation tank (1) is fixedly connected to a conveying pump (3) via a pipeline. The other end of the conveying pump (3) is fixedly connected to a dynamic coupling mixing module. The other end of the dynamic coupling mixing module is fixedly connected to the inlet of the mixing tank (2) via a pipeline. The dynamic coupling mixing module includes a drum filter (4), a venturi tube (5), and a homogenizer (6).

2. The organic-inorganic combined water-soluble fertilizer fermentation device according to claim 1, characterized in that: The drum filter (4) has a fermentation liquid inlet (41) at one end near the delivery pump (3). The fermentation liquid inlet (41) is connected to the delivery pump (3) through a pipe. A cylindrical filter screen (42) is rotatably connected inside the drum filter (4). The direction of the fermentation liquid inlet (41) is tangent to the outer wall of the cylindrical filter screen (42). A first drive motor (43) is fixedly connected at one end of the cylindrical filter screen (42) near the fermentation liquid inlet (41). An outlet end cap (44) is fixedly connected at one end of the drum filter (4) away from the first drive motor (43). The outlet end cap (44) is connected to the Venturi tube (5) through a pipe.

3. The organic-inorganic combined water-soluble fertilizer fermentation device according to claim 2, characterized in that: A backwash pipe (45) is fixedly installed inside the drum filter (4). Several flushing ports are evenly opened on the backwash pipe (45) along the axis. The backwash pipe (45) is fixedly installed at the liquid outlet end cap (44) and extends into the cylindrical filter screen (42). The outer wall of the drum filter (4) is provided with a downwardly contracting slag collection trough (47). A slag discharge port (48) is opened at the bottom of the slag collection trough (47). A slag discharge valve (49) is fixedly installed at the slag discharge port (48).

4. The organic-inorganic combined water-soluble fertilizer fermentation device according to claim 3, characterized in that: The backwash pipe (45) is connected to an external electromagnetic booster pump (46), and the electromagnetic booster pump (46) is connected to the pipe connected to the liquid outlet cap (44) through a pipe.

5. The organic-inorganic combined water-soluble fertilizer fermentation device according to claim 2, characterized in that: A differential pressure sensor is fixedly installed inside the drum filter (4), and the differential pressure sensor is fixedly installed on both the inner and outer sides of the cylindrical filter screen (42).

6. The organic-inorganic combined water-soluble fertilizer fermentation device according to claim 1, characterized in that: A feeding hopper (51) is fixedly connected to the throat of the venturi tube (5).

7. The organic-inorganic combined water-soluble fertilizer fermentation device according to claim 1, characterized in that: The homogenizer (6) includes a housing (61), a stator (62) and a rotor (63). Several shearing teeth (65) are fixedly connected to the rotor (63) and the stator (62). The stator (62) is interference-fitted to the housing (61). The rotor (63) is rotatably connected to the housing (61). The rotor (63) is located in the inner hole of the stator (62). The input end of the rotor (63) is fixedly connected to the second drive motor (64).

8. The organic-inorganic combined water-soluble fertilizer fermentation device according to claim 1, characterized in that: The fermentation tank (1) is fixedly equipped with a stirrer, an aeration system, a temperature sensor, and a dissolved oxygen sensor. The input end of the stirrer is fixedly connected to a third drive motor. The aeration system is fixedly installed at the bottom of the fermentation tank (1). The temperature sensor and the dissolved oxygen sensor are fixedly installed on the inner wall side of the fermentation tank (1). The mixing tank (2) is fixedly equipped with a stirring device, a pH sensor, and a conductivity sensor. The input end of the stirring device is fixedly connected to a fourth drive motor. The pH sensor and the conductivity sensor are both circumferentially and evenly installed on the inner wall side of the mixing tank (2).

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