Fermentation mixer for microbial fertilizer production

Abstract

The utility model relates to the related technical field of fermentation devices, in particular to a fermentation mixer for microbial fertilizer production, which comprises a base, a stand column is fixedly mounted on the upper surface of the base, a discharge hopper is fixedly connected to the upper end of the stand column, and a heat preservation layer is fixedly mounted at the upper end of the discharge hopper. An inner ring of the heat preservation layer is fixedly connected with an inner-layer tank body, a high-frequency electromagnetic coil is arranged on the surface of the inner side of the heat preservation layer, the upper end of the inner-layer tank body is sleeved with a sealing ring, the inner-layer tank body is connected with the sealing cover through the sealing ring, and a paraffin-based phase change material with the melting point being 55 DEG C is arranged in the heat preservation layer. Temperature fluctuation is accurately controlled through melting heat absorption and solidification heat release, compared with a traditional solid structure, thermal resistance is improved, extra heating or cooling equipment is not needed when an extreme temperature difference is coped, a high-frequency electromagnetic coil is matched for direct induction heating of the tank body, and the local overheating problem of resistance heating is avoided; and the problem of inactivation of low-temperature functional bacteria caused by out-of-control temperature in a high-temperature stage is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of fermentation devices, and in particular to a fermentation mixer for microbial fertilizer production. Background Technology

[0002] Fermentation equipment is widely used in industries such as dairy products, beverages, bioengineering, pharmaceuticals, and fine chemicals. Microbial fertilizers use organic materials such as livestock and poultry manure and crop straw as carriers, and introduce functional microorganisms such as nitrogen-fixing bacteria and phosphate-solubilizing bacteria. Through a fermentation process, they are made into functional fertilizers containing live bacteria, metabolites, and humus. They can improve soil structure, promote nutrient absorption, and reduce the use of chemical fertilizers. The fermentation machine is the core equipment to realize this process. Its main body is a tank with a stirring device. When in use, the crushed organic materials and functional microbial agents are first put into the fermentation machine. The stirring is started to mix the materials thoroughly. Then, through heating, the materials are finally transformed into brown, odorless, well-rotted fertilizer. After screening, it can be packaged. Its rich number of live bacteria can effectively improve crop stress resistance and yield.

[0003] Traditional equipment relies on resistance heating or steam boilers, which can easily lead to premature inactivation of functional bacteria during the high-temperature stage. The insulation layer is mostly a solid structure, relying solely on the thickness of the material for insulation, which cannot cope with extreme temperature differences. Traditional methods often use a one-time inoculation method, resulting in a mixture of mesophilic, thermophilic, and pyrophilic bacteria, which can easily lead to nutrient competition. Furthermore, the survival rate of pyrophilic functional bacteria is insufficient during the high-temperature composting period. The discharge port lacks a screening function, and the composted material often contains unbroken clumps, requiring subsequent manual screening, which increases process costs. Utility Model Content

[0004] The purpose of this invention is to provide a fermentation mixer for microbial fertilizer production, which solves the problems mentioned in the background art. Traditional equipment relies on resistance heating or steam boilers, which can easily lead to premature inactivation of functional bacteria at high temperatures. The insulation layer is mostly a solid structure, relying solely on the thickness of the material for insulation, which cannot cope with extreme temperature differences. Traditional methods often use a one-time inoculation method, resulting in a mixture of mesophilic, thermophilic, and pyrophilic bacteria, which can easily lead to nutrient competition. Furthermore, the survival rate of pyrophilic functional bacteria is insufficient during the high-temperature composting period. The discharge port lacks a screening function, and the composted material often contains unbroken clumps, requiring subsequent manual screening, which increases process costs.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fermentation mixer for microbial fertilizer production, comprising a base, a column fixedly installed on the upper surface of the base, a discharge hopper fixedly connected to the upper end of the column, a heat insulation layer fixedly installed on the upper end of the discharge hopper, an inner tank fixedly connected to the inner ring of the heat insulation layer, a high-frequency electromagnetic coil provided on the inner surface of the heat insulation layer, a sealing ring fitted on the upper end of the inner tank, a sealing cap fixedly connected to the upper end of the inner tank, a guide plate fixedly connected to the inner surface of the discharge hopper, a screen fixedly installed on the upper end of the guide plate, vibration motors provided on both sides of the discharge hopper, a rotating shaft provided on the upper surface of the screen, a spiral blade fitted on the outer ring of the rotating shaft, multiple biodegradable capsules fitted on the outer ring of the rotating shaft, a connecting rod fixedly connected to one side of the rotating shaft, a tightly fitting scraper provided on the inner surface of the inner tank, and a drive motor connected to the upper flange of the rotating shaft.

[0006] Preferably, the insulation layer has a hollow structure and is internally provided with a paraffin-based phase change material.

[0007] Preferably, the high-frequency electromagnetic coil is made of high-temperature resistant enameled wire wound around the outer side of the inner tank, and the tank is directly heated by electromagnetic induction.

[0008] Preferably, the sealing cap is made of high borosilicate glass and is connected to the inner tank body by a sealing ring.

[0009] Preferably, the rotating shaft and the scraper are fixedly connected by a connecting rod, and the scraper is driven to rotate by a drive motor via the rotating shaft.

[0010] Preferably, a temperature sensor is fixedly installed on the front side of the sealing cover, and the sensing end of the temperature sensor penetrates through the sealing cover. UV-LED lamps are fixedly installed through both ends of the sealing cover.

[0011] Preferably, both ends of the inner tank are fixedly installed with air pipes, the outlet flange of the air pipes is connected to a pressure controller, and the outlet flange of the pressure controller is connected to a waste gas recovery bottle.

[0012] Compared with existing technologies, the beneficial effects of this utility model are as follows: This fermentation mixer for microbial fertilizer production incorporates a paraffin-based phase change material with a melting point of 55℃ in its insulation layer. Through melting and heat absorption and solidification and heat release, it precisely controls temperature fluctuations, improving thermal resistance compared to traditional solid structures. This eliminates the need for additional heating or cooling equipment to handle extreme temperature differences. Combined with a high-frequency electromagnetic coil for direct induction heating of the tank, it avoids the problem of localized overheating associated with resistance heating, fundamentally solving the problem of inactivation of low-temperature functional bacteria due to temperature runaway during high-temperature stages. The lower layer of the three-layer biodegradable capsule encapsulates mesophilic initiating bacteria with low-viscosity sodium alginate, which rapidly dissolves within 24 hours of contact with the material, decomposing easily soluble organic matter and raising the temperature. The middle layer utilizes chitosan-thermosensitive materials to trigger dissolution at temperatures above 45°C, releasing thermophilic Bacillus stearothermophilus and other thermodegrading bacteria, avoiding direct competition with mesophilic bacteria. The upper layer uses sodium carboxymethyl cellulose microspheres to slowly release low-temperature functional bacteria, which are gradually released only during the fermentation cooling period, ensuring that each strain plays its role at the optimal stage. This completely avoids the nutrient competition and activity loss caused by traditional mixed inoculation. The discharge hopper integrates a vibrating screen and a spiral blade crushing device. The spiral blade on the outside of the rotating shaft rotates synchronously with the stirring, pre-crushing large particles such as straw and manure. During discharge, the vibrating motor drives the screen to vibrate at high frequency, separating clumps of material in real time. Homogenization can be achieved at discharge without manual intervention. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall appearance and structure of the present utility model;

[0014] Figure 2 This is a schematic diagram of the interaction between the rotating shaft and the spiral cutter of this utility model;

[0015] Figure 3 This is a schematic diagram of the structure in which the insulation layer and the inner tank body of this utility model cooperate with each other;

[0016] Figure 4 This is a schematic diagram of the structure in which the sealing cap and sealing ring of this utility model cooperate with each other.

[0017] In the diagram: 1. Base; 2. Column; 3. Discharge hopper; 4. Insulation layer; 5. Inner tank; 6. High-frequency electromagnetic coil; 7. Sealing ring; 8. Sealing cap; 9. Guide pipe; 10. Screen; 11. Vibrating motor; 12. Rotating shaft; 13. Spiral blade; 14. Multi-layer biodegradable capsule; 15. Connecting rod; 16. Scraper; 17. Drive motor; 18. Temperature sensor; 19. UV-LED lamp; 20. Gas pipe; 21. Air pressure controller; 22. Waste gas recovery bottle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides a technical solution: a fermentation mixer for microbial fertilizer production, including a base 1, a column 2 fixedly installed on the upper surface of the base 1, a discharge hopper 3 fixedly connected to the upper end of the column 2, an insulation layer 4 fixedly installed on the upper end of the discharge hopper 3, an inner tank 5 fixedly connected to the inner ring of the insulation layer 4, a high-frequency electromagnetic coil 6 provided on the inner surface of the insulation layer 4, a sealing ring 7 fitted on the upper end of the inner tank 5, and a sealing cover 8 fixedly connected to the upper end of the inner tank 5. A guide plate 9 is fixedly connected to the surface, and a screen 10 is fixedly installed on the upper end of the guide plate 9. Vibration motors 11 are provided on both sides of the discharge hopper 3. A rotating shaft 12 is provided on the upper surface of the screen 10. A spiral blade 13 is sleeved on the outer ring of the rotating shaft 12. A multi-layer biodegradable capsule 14 is sleeved on the outer ring of the rotating shaft 12. A connecting rod 15 is fixedly connected to one side of the rotating shaft 12. A tightly fitting scraper 16 is provided on the inner surface of the inner tank 5. A drive motor 17 is connected to the upper flange of the rotating shaft 12.

[0020] Furthermore, the insulation layer 4 has a hollow structure and is filled with paraffin-based phase change material. Through the setting of the insulation layer 4, during the medium-temperature start-up stage, the phase change material maintains the temperature by releasing heat through solidification, avoiding start-up delays caused by low external temperatures. During the high-temperature curing stage, the phase change material melts and absorbs heat to prevent overheating, protecting the activity of high-temperature bacteria in the middle layer while preventing the premature inactivation of low-temperature bacteria in the upper layer. During the cooling function stage, the phase change material releases stored heat to slow down the cooling rate, providing a longer activity window for the low-temperature bacteria in the upper layer.

[0021] Furthermore, the high-frequency electromagnetic coil 6 is made of high-temperature resistant enameled wire wound around the outer side of the inner tank 5, and directly heats the tank through the principle of electromagnetic induction. Through the setting of the high-frequency electromagnetic coil 6, the generated alternating magnetic field covers the entire tank, making the eddy currents more evenly distributed inside the tank, thereby achieving heating of the tank without dead angles.

[0022] Furthermore, the sealing cap 8 is made of high borosilicate glass and is connected to the inner tank 5 through a sealing ring 7. With the setting of the sealing cap 8, the sealing cap 8 can withstand the high temperature environment during the fermentation process, avoiding the deformation and release of harmful substances caused by traditional plastic or metal materials due to high temperature. Its high light transmittance makes it easy for operators to directly observe the state of the material inside the tank without having to open the cap frequently, thus reducing the risk of contamination by miscellaneous bacteria.

[0023] Furthermore, the rotating shaft 12 and the scraper 16 are fixedly connected by the connecting rod 15. The scraper 16 is driven to rotate by the drive motor 17 through the rotating shaft 12. With the setting of the scraper 16, during the fermentation of microbial fertilizer, organic materials such as livestock and poultry manure and straw are easily adhered to the inner wall of the inner tank 5 under high temperature and high humidity. The scraper 16 solves the stubborn problem of material sticking to the wall in traditional fermentation mixers through mechanical scraping and dynamic cleaning.

[0024] Furthermore, a temperature sensor 18 is fixedly installed on the front side of the sealing cover 8, and the sensing end of the temperature sensor 18 penetrates through the sealing cover 8. UV-LED lamps 19 are fixedly installed through both ends of the sealing cover 8. Based on the setting of the UV-LED lamps 19, the model of the temperature sensor 18 is selected as FOX-2004 and the model of the UV-LED lamp 19 is selected as ZDUV-C254-10. After each discharge, the UV-LED lamps 19 are turned on for about 10 minutes, and the residual microorganisms on the surface of the viewing window and the tank wall are killed, replacing the traditional manual wiping disinfection.

[0025] Furthermore, both ends of the inner tank 5 are fixedly installed with gas pipes 20. The gas pipe 20 is connected to a pressure controller 21 via a flange at its outlet end. The pressure controller 21 is connected to a waste gas recovery bottle 22 via a flange at its outlet end. Through the waste gas recovery bottle 22, the waste gas generated during fermentation enters the pressure controller 21 via the gas pipe 20. The pressure controller 21 is model DTT. After the pressure is regulated, the waste gas enters the waste gas recovery bottle 22. The waste gas recovery bottle 22 is model BZH-PFA-800. The waste gas recovery bottle 22 is filled with biological filter media and microbial degradation agent. The biological filter media and microbial degradation agent inside the bottle are used to remove pollutants such as ammonia and hydrogen sulfide from the waste gas.

[0026] Working Principle: This fermentation mixer for microbial fertilizer production first places the pulverized organic material and multi-layer biodegradable capsules 14 into the inner tank 5. The drive motor 17 drives the spiral blade 13 to stir the material through the rotating shaft 12. At the same time, the rotating shaft 12 drives the scraper 16 to rotate closely against the inner wall of the inner tank 5 through the connecting rod 15, scraping off the material adhering to the wall to ensure uniform mixing. The paraffin-based phase change material in the insulation layer 4 works in conjunction with the inner high-frequency electromagnetic coil 6 to heat the tank through electromagnetic induction and utilize the heat absorption during melting and the heat release during solidification of the phase change material to raise the temperature inside the tank. The temperature is precisely controlled within the range required for medium-temperature start-up (25-45℃), high-temperature composting (55-70℃), and cooling function (<45℃). During this period, temperature sensor 18 monitors the temperature in real time. The lower layer of the multi-layer biodegradable capsule 14 consists of low-viscosity sodium alginate and amylase, containing brewer's yeast and Aspergillus niger. The middle layer consists of chitosan and thermosensitive poly(N-isopropylacrylamide), containing thermophilic Bacillus stearothermophilus and Clostridium thermophilum. The upper layer consists of sodium carboxymethyl cellulose and alginate microspheres, containing phosphate-solubilizing bacteria, nitrogen-fixing bacteria, and lactic acid bacteria. The lower layer remains in contact with the material for 24 hours. The material dissolves rapidly within a short time, initially releasing mesophilic initiating bacteria. At this stage, the material temperature is 25-45℃. The mesophilic bacteria preferentially decompose easily soluble organic matter, generating heat and raising the material temperature, thus preparing for subsequent stages. The middle layer of temperature-sensitive material undergoes a phase transition above 45℃, triggering capsule dissolution and releasing thermophilic degradation bacteria. At this point, the material has entered the high-temperature composting stage. The thermophilic bacteria can efficiently decompose recalcitrant substances such as cellulose and hemicellulose, avoiding competition for nutrients with the mesophilic bacteria that have already completed their mission. The upper layer of material has the slowest degradation rate, and this degradation only occurs during the cooling stage due to the water absorption and expansion of the alginate microspheres. Low-temperature functional bacteria are introduced. At this point, the high-temperature stage has ended, and the low-temperature bacteria can focus on secreting metabolites and accumulating in the material, avoiding inactivation by high temperature. The sealing cap 8 seals the tank through the sealing ring 7. The UV-LED lamps 19 at both ends are turned on periodically to kill miscellaneous bacteria. The waste gas generated during fermentation enters the gas pressure controller 21 through the gas pipe 20 and is then purified by biological filter material and degradation agent in the waste gas recovery bottle 22. After fermentation is completed, the material enters the discharge hopper 3 through the guide plate 9. The vibrating motors 11 on both sides drive the screen 10 to vibrate and screen at high frequency, and the qualified fine material is directly discharged.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fermentation mixing machine for microbial fertilizer production, comprising a base (1), characterized in that: A column (2) is fixedly installed on the upper surface of the base (1). A discharge hopper (3) is fixedly connected to the upper end of the column (2). An insulation layer (4) is fixedly installed on the upper end of the discharge hopper (3). An inner tank (5) is fixedly connected to the inner ring of the insulation layer (4). A high-frequency electromagnetic coil (6) is provided on the inner surface of the insulation layer (4). A sealing ring (7) is fitted on the upper end of the inner tank (5). A sealing cover (8) is fixedly connected to the upper end of the inner tank (5). A guide plate (9) is fixedly connected to the inner surface of the discharge hopper (3). A screen (10) is fixedly installed at the upper end of the 9), and a vibration motor (11) is provided on both sides of the discharge hopper (3). A rotating shaft (12) is provided on the upper surface of the screen (10). A spiral blade (13) is sleeved on the outer ring of the rotating shaft (12). A multi-layer biodegradable capsule (14) is sleeved on the outer ring of the rotating shaft (12). A connecting rod (15) is fixedly connected to one side of the rotating shaft (12). A tightly fitting scraper (16) is provided on the inner surface of the inner tank (5). A drive motor (17) is connected to the upper flange of the rotating shaft (12).

2. The fermentation mixing machine for microbial fertilizer production according to claim 1, characterized in that: The insulation layer (4) is a hollow structure with a paraffin-based phase change material inside.

3. The fermentation mixing machine for producing microbial fertilizer according to claim 1, characterized in that: The high-frequency electromagnetic coil (6) is made of high-temperature resistant enameled wire wound around the outside of the inner tank (5) and directly heats the tank through the principle of electromagnetic induction.

4. The fermentation mixing machine for producing microbial fertilizer according to claim 1, characterized in that: The sealing cap (8) is made of high borosilicate glass and is connected to the inner tank (5) by a sealing ring (7).

5. The fermentation mixing machine for producing microbial fertilizer according to claim 1, characterized in that: The rotating shaft (12) and the scraper (16) are fixedly connected by a connecting rod (15), and the scraper (16) is driven to rotate by a drive motor (17) through the rotating shaft (12).

6. The fermentation mixing machine for microbial fertilizer production according to claim 1, characterized in that: A temperature sensor (18) is fixedly installed on the front side of the sealing cover (8), and the sensing end of the temperature sensor (18) passes through the sealing cover (8). UV-LED lamps (19) are fixedly installed through both ends of the sealing cover (8).

7. The fermentation mixing machine for producing microbial fertilizer according to claim 1, characterized in that: Both ends of the inner tank (5) are fixedly installed with air pipes (20), and the air outlet flange of the air pipe (20) is connected to a pressure controller (21), and the air outlet flange of the pressure controller (21) is connected to a waste gas recovery bottle (22).

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