Processing equipment and technology of hermetia illucens protein feed for aquatic products

Abstract

The invention particularly relates to processing equipment and technology of hermetia illucens protein feed for aquatic products, the processing equipment comprises a bottom plate, the bottom plate is provided with a crushing cylinder, the crushing cylinder is transversely placed, and the crushing cylinder is used for storing materials; an openable cover plate is arranged at the upper part of the crushing cylinder, so that the interior of the crushing cylinder can be conveniently cleaned by subsequently opening the cover plate; a feeding hopper is arranged on the cover plate and is used for feeding materials; a crushing mechanism is transversely arranged in the crushing cylinder and is used for crushing and stirring materials; the crushing cylinder is rotatably positioned on the bottom plate; a liquid discharging pipe is arranged on the rear side face of the smashing cylinder, a discharging opening is formed in the front side face of the smashing cylinder, and the rotatable smashing cylinder is used for discharging liquid generated by materials in the smashing cylinder through the liquid discharging pipe and discharging the materials in the smashing cylinder; the processing process of the hermetia illucens protein feed can be more efficient, energy-saving and high in automation degree, an innovative solution is provided for production of aquatic feed, the utilization rate of hermetia illucens protein can be increased, energy consumption and cost in feed production are reduced, and wide application prospects are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of feed preparation, and in particular to processing equipment and technology for black soldier fly protein feed for aquaculture. Background Art

[0002] In recent years, with the continued development of the global aquaculture industry, the demand for aquatic feed has continued to increase. Especially in the context of the increasingly tight supply and rising prices of traditional feed ingredients such as fish meal, the development of efficient and sustainable feed ingredients that can replace fish meal has become an urgent need for the aquaculture industry. Black soldier fly (Hermetia illucens) has become one of the ideal choices for replacing fish meal due to its high protein, high fat content and easy breeding. The application prospects of black soldier fly larvae in aquaculture are broad. It can effectively solve the problem of feed raw material shortage and improve the nutritional value of feed. In addition, because its breeding process has little impact on the environment, it meets the requirements of green environmental protection and sustainable development.

[0003] Despite the high nutritional value of black soldier flies, effectively processing them into a high-efficiency feed suitable for aquaculture still faces many challenges. Currently, traditional black soldier fly protein feed processing mainly involves multiple independent steps, such as crushing, drying, enzymatic hydrolysis, and oil separation. This traditional process typically requires the collaboration of multiple pieces of equipment, resulting in complex operations and high energy consumption, which affects production efficiency. Furthermore, the oil separation and protein hydrolysis processes are difficult to precisely control, resulting in nutritional losses in the black soldier fly protein and unstable feed quality.

[0004] In current technical solutions, many equipment and process steps are not fully integrated, resulting in multiple processing steps requiring separate equipment, low efficiency, and high production costs. Furthermore, existing processes such as pulverization, mixing, and oil separation often require high energy consumption and present challenges in cleaning and maintenance. Incomplete equipment cleaning can lead to cross-contamination, compromising feed safety and quality.

[0005] To this end, we provide a kind of black soldier fly protein feed processing equipment and process for aquaculture, which combines multiple process steps such as crushing, stirring, oil separation, enzymatic hydrolysis, and heating in one device through an integrated design to achieve efficient processing of black soldier fly protein. This reduces the tedious operations in the production process, simplifies the equipment structure, and greatly improves the production efficiency and quality of black soldier fly protein feed. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a processing device and process for black soldier fly protein feed for aquatic use.

[0007] The object of the present invention is achieved as follows: A processing device for black soldier fly protein feed for aquatic products comprises a bottom plate, on which a grinding cylinder is arranged, the grinding cylinder is placed horizontally, and the grinding cylinder is used to store materials;

[0008] The upper part of the crushing cylinder is provided with an openable cover, which is convenient for opening the cover to clean the inside later;

[0009] A feed hopper is provided on the cover plate, and the feed hopper is used to put materials in;

[0010] A crushing mechanism is arranged horizontally in the crushing cylinder, which is used to crush and stir the materials;

[0011] The grinding cylinder is rotatably located on the bottom plate; a drainage pipe is provided on the rear side of the grinding cylinder, and a discharge port is provided on the front side of the grinding cylinder. The rotatable grinding cylinder is used to discharge the liquid generated by the internal material through the drainage pipe, as well as to discharge the internal material.

[0012] Furthermore, the pulverizing mechanism includes a pulverizing rod, which is laterally rotatable in the pulverizing barrel, and pulverizing blades are provided on the outer side of the pulverizing rod. The pulverizing blades rotate along with the pulverizing rod to pulverize and stir the material.

[0013] Furthermore, the pulverizing mechanism also includes a pulverizing motor, which is located on the side of the pulverizing barrel and drives the pulverizing rod to rotate.

[0014] Furthermore, a connecting cylinder is rotatably provided on the outer side of the crushing rod, and the connecting cylinder rotatably passes through the right side of the crushing cylinder. A connecting rod is provided on the outer side of the connecting cylinder, and a scraping rod is connected to the outer end of the connecting rod.

[0015] A processing technology for aquatic black soldier fly protein feed, the processing technology for aquatic black soldier fly protein feed is based on the above-mentioned processing equipment for aquatic black soldier fly protein feed,

[0016] The method comprises the steps of: washing the fresh black soldier flies with clean water to remove surface impurities, filtering the water and steaming at 100° C. for 10 minutes to achieve preliminary sterilization;

[0017] S2: Beating, adding water to adjust the water content to 70-75%, heating to 95-100℃, and separating the oil;

[0018] The step S2 comprises:

[0019] S21: The sterilized black soldier flies are placed into a grinding drum through a feed hopper; the black soldier flies are then ground and beaten by a grinding mechanism;

[0020] S22: After beating, water is added through the feed hopper to adjust the material to a moisture content of 70-75%. During the water addition process, the material and water are stirred and fully mixed by the rotation of the crushing mechanism;

[0021] S23: The interior is heated to 95-100°C by the heating mechanism, and the crushing mechanism rotates to achieve the stirring function of the liquid, and the grease is separated after standing. By rotating the crushing cylinder to make it rotate backward, the upper layer of grease in the crushing cylinder is discharged through the upward inclined drainage pipe to achieve grease separation.

[0022] Black soldier fly protein has a high protein content, but also a high fat content. To improve the efficiency of enzymatic hydrolysis of black soldier fly protein, some fat must be removed. Heating the feed to 95-100°C physically separates the fat from the feed. Within this temperature range, the fat is activated, converting it to a liquid state, making it easier to drain through a sloped drain pipe. Black soldier fly fat is viscous and has poor fluidity at room temperature. Heating it to 95-100°C transforms it into a thinner liquid with enhanced fluidity, making it easier to separate and drain. This helps reduce the fat content in the feed and improve the quality of the final feed. Controlling the temperature (95-100°C) ensures effective fat separation while avoiding the damage to the protein caused by excessive temperatures. High temperatures can denature the protein structure, affecting digestibility and nutritional value. However, the 95-100°C temperature range effectively promotes fat separation while maintaining protein stability and nutritional value. At this temperature, not only is the fat effectively separated, but the enzymatic hydrolysis reaction in the feed also proceeds smoothly. When the temperature is controlled at 95-100℃, it can provide the optimal temperature conditions required for the enzymatic hydrolysis reaction, while avoiding inactivation or excessive denaturation of the enzyme due to excessive temperature.

[0023] The following are experimental data on performance indicators including oil separation rate, protein stability and material fluidity at different temperatures:

[0024]

[0025] Data Description:

[0026] Grease separation rate: At temperatures above 90°C, the grease separation effect is significantly improved. Especially in the 95-100°C range, the fluidity of the grease can be effectively activated and the grease can be separated quickly, achieving the highest grease separation rate.

[0027] Protein stability: When the temperature is too high (e.g. over 105°C), the protein may be affected by the high temperature, causing structural denaturation and affecting its nutritional value. However, temperatures of 95°C and 100°C help maintain the stability of the protein and ensure that its nutritional components are not destroyed.

[0028] Material fluidity: At higher temperatures, the fluidity of the material is enhanced, especially at 100°C. At this time, the oil and fat have been completely separated and the material has become more uniform, which is convenient for subsequent enzymatic hydrolysis and processing.

[0029] Summary: Heating within the 95-100°C temperature range achieves optimal oil separation while maintaining protein stability, maximizing the nutritional value of the black soldier fly protein feed. This temperature range not only improves oil separation efficiency but also increases feed digestibility and absorption, ultimately optimizing aquatic feed quality.

[0030] S3: The insect pulp after oil separation is subjected to an enzymatic hydrolysis reaction; the enzymatic hydrolysis reaction breaks down the black soldier fly protein into smaller peptides and amino acids, thereby improving the digestibility and absorption rate of the protein, making it easier for aquatic animals to digest and absorb, thereby improving the palatability and nutritional value of the feed; certain anti-nutritional factors, such as anti-enzyme substances in plant-based proteins (such as components that inhibit enzyme activity), can be degraded or removed by the enzymatic hydrolysis reaction, thereby improving the bioavailability of the feed; after the enzymatic hydrolysis, the protein releases more amino acids, which increases the intake of amino acids by aquatic animals and improves the overall nutritional value of the feed; after the enzymatic hydrolysis is completed, the temperature is raised to 95-100 ° C, and the enzyme is inactivated and sterilized; after the enzymatic hydrolysis process is completed, the temperature is raised to 95-100 ° C and maintained for a certain period of time. This step has two main purposes: enzyme inactivation and sterilization. That is, after the enzymatic hydrolysis is completed, continuing to heat to 95-100 ° C helps to completely stop the activity of the enzyme and ensure that the enzymatic hydrolysis reaction does not continue. This temperature can quickly inactivate the enzyme, avoid further hydrolysis of the protein in the material, thereby ensuring that the enzymatic hydrolysis process is completed within the predetermined time. High temperature enzyme inactivation can not only effectively stop the reaction and avoid overreaction, but also ensure the stability of the protein structure, avoid possible excessive degradation, and maintain its nutritional value.

[0031] The primary purpose of sterilization is to eliminate harmful microorganisms that may be present during the enzymatic hydrolysis process, ensuring feed safety. Especially during the enzymatic hydrolysis process, since bacteria and other microorganisms may be present in the raw materials, heating them to 95-100°C can kill pathogens and bacteria, preventing their growth and reproduction. High-temperature sterilization effectively removes any pathogens, mold, fungi, and other potential pathogens, ensuring that the final product is free of any harmful pathogens, ensuring feed safety and compliance with aquaculture hygiene standards.

[0032] The heating step not only ensures protein stability during enzymatic hydrolysis but also improves the storage properties of the feed. Heat-treated feed is sterilized, effectively extending its shelf life, preventing the growth of harmful bacteria during storage, and reducing the risk of spoilage and deterioration.

[0033] The combined use of enzymatic hydrolysis and enzyme inactivation and sterilization steps not only significantly improves the digestibility and nutritional value of black soldier fly protein feed, making it more suitable for digestion and absorption by aquatic animals, but also ensures feed safety and prevents disease transmission due to microbial contamination. Furthermore, this heat sterilization process prevents nutrient loss caused by excessive enzymatic hydrolysis, maintaining the overall quality and stability of the feed.

[0034] The step 31 includes:

[0035] S31: After the oil is separated, alkaline protease is added to the insect pulp according to 0.4-0.8% by weight, and the enzymatic hydrolysis temperature is 45-50°C, that is, the material is heated by a heating mechanism, and the enzymatic hydrolysis reaction is carried out for 2-3 hours;

[0036] S32: then adjusting the pH to about 7 with citric acid, adding 0.4-0.8% by weight of neutral protease, and the enzymatic hydrolysis temperature is 50-55°C, that is, heating the material by the heating mechanism, and performing the enzymatic hydrolysis reaction for 2-3 hours;

[0037] S33: After the enzymatic hydrolysis is completed, the temperature rises to 95-100°C, that is, the material is heated by the heating mechanism.

[0038] S4: After enzyme inactivation and sterilization, the temperature drops to 70°C, and the material is then transported to the aquatic extruder modulator. The addition amount is 150-250 kg / ton of aquatic feed, replacing 40-60% of the fish meal in the formula.

[0039] When the present application is used, the fresh black soldier flies are rinsed with clean water to remove surface impurities, filtered and steamed at 100°C to achieve preliminary sterilization; then they are pulped, and the sterilized black soldier flies are placed into a crushing barrel through a feed hopper; then they are crushed and pulped by a crushing mechanism; during the crushing and pulping process, the crushing fan blades rotate to crush the black soldier flies, and at the same time, in order to prevent the black soldier flies from adhering to the inner wall of the crushing barrel and the lower surface of the cover plate, resulting in poor crushing effect, a scraper is provided to scrape and clean the inner side of the crushing barrel and the lower surface of the cover plate, and the scraped black soldier flies can be crushed and pulped again.

[0040] After beating, water is added through the feed hopper to adjust the material to a moisture content of 70-75%. (Water can be added according to the proportion of the material during adjustment, and there is no technical limitation.) During the water addition process, the material and water are stirred and fully mixed by the rotation of the crushing mechanism.

[0041] The inside of the grinding cylinder is heated to 95-100℃ by a heating mechanism, and the grinding mechanism rotates to achieve the stirring function of the liquid, and the grease is separated after standing. By rotating the grinding cylinder to make it rotate backward, the upper layer of grease in the grinding cylinder is discharged through the upward inclined drainage pipe to achieve grease separation. The drainage pipe is provided to achieve grease separation. After the grease separation is completed, the grinding cylinder is reset.

[0042] The insect pulp after oil separation is subjected to an enzymatic hydrolysis reaction; after oil separation, alkaline protease is added to the insect pulp according to 0.4-0.8% by weight, and the enzymatic hydrolysis temperature is 45-50°C, that is, the material is heated by a heating mechanism, and the enzymatic hydrolysis reaction is carried out for 2-3 hours;

[0043] Then, citric acid is used to adjust the pH to about 7, that is, the pulverizing motor is controlled to drive the pulverizing blades to rotate to fully mix and stir the materials, thereby realizing rapid adjustment of the pH value of the materials. At the same time, the pH value of the materials is detected by a pH sensor provided at the lower side of the pulverizing cylinder. Neutral protease is added at a weight ratio of 0.4-0.8%, and the enzymolysis temperature is 50-55° C., that is, the materials are heated by a heating mechanism, and the enzymolysis reaction is carried out for 2-3 hours. The heating mechanism is a conventional technique that can heat the materials to a specified temperature range, and no technical limitation is imposed. At the same time, a temperature sensor 1 is provided to perform temperature correction on the materials heated by the heating mechanism, and a temperature sensor 2 is provided to measure the gas temperature at the upper part of the pulverizing cylinder.

[0044] After the enzymatic hydrolysis is completed, the temperature rises to 95-100°C, that is, the material is heated by the heating mechanism to inactivate the enzyme and sterilize it; (Clostridium perfringens can withstand a high temperature of 90°C for 30 minutes and a high temperature of 100°C for 5 minutes).

[0045] After enzyme inactivation and sterilization, the temperature drops to 70°C. When the temperature drops, a heat dissipation mechanism is used to quickly dissipate heat from the grinding cylinder. (The heat dissipation mechanism can be to blow the grinding cylinder with wind to dissipate heat or to use liquid circulation to quickly exchange heat and cool the outer side of the grinding cylinder to achieve rapid cooling of the internal materials. The lower side of the grinding cylinder is made of a material that can quickly conduct heat, such as iron or other metals. The existing technology will not be described in detail. It is sufficient to achieve the cooling function). At the same time, air is pumped outward through the pipe to quickly extract the high-temperature gas in the grinding cylinder to achieve rapid cooling of the materials in the grinding cylinder.

[0046] The cooled material is opened by the driving mechanism, and then the driving gear at the output end of the motor is controlled to drive the driven gear to rotate. The driven gear is fixedly connected to the outer side of the transmission ring, thereby driving the grinding drum to rotate. When the grinding drum rotates forward, the material inside can be discharged from the discharge port; the material is then transported to the modulator of the aquatic extruder, and the addition amount is 150-250 kg / ton of aquatic feed, replacing 40-60% of the fish meal in the formula.

[0047] This application utilizes a pulverizing drum to perform all the necessary steps for preparing black soldier fly protein feed for aquaculture, including pulverizing, beating, mixing, enzymatic hydrolysis, internal temperature control, and oil separation. This allows for multifunctional, integrated processing. The integrated pulverizing drum design allows for multi-step processing of black soldier flies within a closed system, reducing the need for switching between various steps and equipment required in traditional processes, improving production efficiency, and reducing energy consumption.

[0048] Specifically, after an initial cleaning, the black soldier fly is first crushed and pulped within a pulverizing drum. A scraper ensures the drum's inner walls are kept clean, preventing the flies from adhering to the wall and affecting the pulverization process. Water is then added to maintain a moisture content between 70-75%. The pulverizing mechanism then stirs the mixture, ensuring the water and black soldier fly powder are thoroughly mixed, preparing for the subsequent enzymatic hydrolysis reaction.

[0049] Inside the grinding drum, the material is heated to 95-100°C by a heating mechanism, ensuring that the material is stirred and mixed at the appropriate temperature, effectively promoting the separation of oil and fat. The oil is then discharged through the drain pipe, effectively reducing the fat content of the material, making it more suitable for digestion and absorption by aquatic animals. After oil separation, the material enters the enzymatic hydrolysis process. At the enzymatic hydrolysis temperature, the enzymatic hydrolysis reaction can last for 2-3 hours. Protease and neutral protease are used to further hydrolyze the black soldier fly protein, improving its nutritional value and palatability for aquatic animals.

[0050] In addition, temperature and pH sensors installed within the grinding drum monitor and adjust the reaction temperature and the pH value of the material in real time to ensure optimal enzymatic hydrolysis. The entire process is completed within the grinding drum, achieving simultaneous control of temperature, enzymatic hydrolysis, oil separation, stirring, and mixing, significantly improving production efficiency and reducing production costs.

[0051] The design of the present invention makes the processing process of black soldier fly protein feed more efficient, energy-saving and highly automated, provides an innovative solution for the production of aquatic feed, helps to improve the utilization rate of black soldier fly protein, and reduces energy consumption and costs in feed production, and has broad application prospects.

[0052] Beneficial effects:

[0053] 1. Integrated processing to improve production efficiency:

[0054] By integrating multiple processes, including pulverization, beating, mixing, enzymatic hydrolysis, and oil separation, within the pulverization drum, this invention reduces the switching and transition between multiple links and equipment in traditional processing. This integrated design not only simplifies the production process but also effectively improves production efficiency and reduces equipment investment and maintenance costs. All processing steps are completed within a closed system, eliminating the duplication of multiple equipment and process steps and improving the automation level of the production line.

[0055] 2. Save energy and reduce consumption, reduce production costs:

[0056] This solution reduces energy consumption by eliminating the drying, transporting, and separation steps required in traditional processes. In particular, the use of appropriate temperature control and heating methods during oil separation and enzymatic hydrolysis eliminates the need for additional drying processes, preventing the loss of protein and other nutrients due to high temperatures and ensuring the quality and nutritional value of the final product. Furthermore, oil separation reduces unnecessary fat content in black soldier fly feed, helping to improve the nutritional structure of the feed and ensure better digestion and absorption by aquatic animals.

[0057] 3. Improve the palatability and digestibility of black soldier fly protein feed:

[0058] Through precise enzymatic hydrolysis technology and temperature control, the present invention effectively hydrolyzes black soldier fly protein, improving its digestibility and palatability for aquatic animals. Precise control of the enzymatic hydrolysis reaction not only promotes protein degradation but also removes anti-nutritional factors, thereby increasing the bioavailability of the feed. This improvement helps improve aquaculture production efficiency and optimize feed conversion rates.

[0059] 4. Reduce wet feed waste and storage problems:

[0060] This process directly prepares wet feed suitable for enzymatic hydrolysis and delivers it directly to the extruder for dry pellet feed preparation without drying. This avoids the storage and transportation issues of wet feed and reduces the risk of wet feed spoilage. This reduces waste associated with wet feed storage, optimizes resource utilization, and improves the economic benefits of the entire production process.

[0061] 5. Simplify production operations and reduce labor intensity:

[0062] The equipment's highly automated design reduces manual labor, particularly in the control of crushing, enzymatic hydrolysis, and mixing processes. Equipped with temperature and pH sensors and an automatic adjustment system, it monitors and adjusts key parameters in real time, making the production process more precise and reducing human error. Furthermore, the streamlined operating procedures and intelligent control system reduce operator workload and enhance the stability and efficiency of the production line.

[0063] 6. Significant environmental benefits:

[0064] This technical solution offers significant environmental benefits by reducing the significant energy consumption and wet feed waste associated with traditional processing. It also reduces energy consumption and environmental pollution associated with traditional drying processes. Furthermore, the black soldier fly feed is derived from the conversion of organic waste, meeting the requirements of sustainable development and promoting environmentally friendly development in the aquaculture industry.

[0065] The black soldier fly protein feed processing equipment and process of the present invention, through integrated design, energy-saving and consumption-reducing operation process, efficient enzymatic hydrolysis reaction and precise temperature control, not only improves production efficiency and reduces costs, but also optimizes the nutritional content of the feed and the digestion and absorption capacity of aquatic animals, and has significant economic, environmental and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 It is a structural schematic diagram of the invention.

[0067] Figure 2 It is a schematic diagram of the rear structure of the invention.

[0068] Figure 3 It is a schematic structural diagram of the right side of the invention.

[0069] Figure 4 It is a schematic diagram of the local structure of the invention.

[0070] Figure 5 It is a schematic diagram of the scraper structure of the invention.

[0071] Figure 6 Flow chart of the processing technology of the invention.

[0072] Description of reference numerals:

[0073] 1. Bottom plate, 2. Right support frame, 3. Temperature sensor 1, 4. Crushing cylinder, 5. Cover plate, 6. Feed hopper, 7. Heating mechanism, 8. Heat dissipation mechanism, 9. Discharge channel, 10. Sealing plate, 11. Driving mechanism, 12. Drain pipe, 13. Air pipe, 14. Driven gear, 15. Transmission ring, 16. Crushing motor, 17. Rotating motor, 18. pH sensor, 19. Left support frame, 20. Temperature sensor 2, 21. Gear 1, 22. Gear 2, 23. Crushing rod, 24. Gear 4, 25. Fixed rod, 26. Gear 3, 27. Connecting cylinder, 28. Connecting rod, 29. Scraper rod. DETAILED DESCRIPTION

[0074] Example 1, as Figure 1-5 As shown, the object of the present invention is achieved as follows: a processing device for black soldier fly protein feed for aquatic products, comprising a bottom plate 1, on which a grinding cylinder 4 is provided, the grinding cylinder 4 is placed horizontally, and the grinding cylinder 4 is used to store materials;

[0075] An openable cover 5 is provided on the top of the crushing cylinder 4, which is convenient for opening the cover 5 to clean the inside.

[0076] A feed hopper 6 is provided on the cover plate 5, and the feed hopper 6 is used to put materials in;

[0077] A pulverizing mechanism is positioned transversely within the pulverizing barrel 4, pulverizing and agitating the material. The pulverizing mechanism includes a pulverizing rod 23, which is rotatably positioned transversely within the pulverizing barrel 4. Pulverizing blades are positioned on the outer side of the pulverizing rod 23, pulverizing and agitating the material as the blades rotate with the pulverizing rod 23. The pulverizing mechanism also includes a pulverizing motor 16, located on the side of the pulverizing barrel 4, which drives the pulverizing rod 23 in rotation. A connecting rod 27 is rotatably positioned on the outer side of the pulverizing rod 23, rotatably extending through the right side of the pulverizing barrel 4. A connecting rod 28 is positioned on the outer side of the connecting rod 27, with a scraper rod 29 connected to its outer end. The scraper rod 29 has a curved outer end that mates with the inner side of the pulverizing barrel 4. The inner side of the scraper rod 29 is inclined, allowing for easy removal of black soldier flies or other added materials adhering to the inner side of the pulverizing barrel 4.

[0078] Traditional black soldier fly protein feed processing equipment usually handles functions such as crushing, stirring, and cleaning separately, resulting in frequent switching of multiple equipment operations and low production efficiency. The present invention integrates the three functions of crushing, stirring, and scraping by designing an integrated crushing barrel 4. The crushing mechanism drives the crushing blades through the crushing rod 23 to crush and stir the material, while the scraper rod 29 design can effectively remove adhesions on the inner wall of the crushing barrel 4, preventing material accumulation from affecting the crushing or mixing effect. This integrated design not only improves production efficiency, but also avoids the tedious operation of multiple equipment, realizing an efficient and continuous production process.

[0079] The grinding cylinder 4 is rotatably located on the bottom plate 1; a drain pipe 12 is provided on the rear side of the grinding cylinder 4, and a discharge port is provided on the front side of the grinding cylinder 4. The rotatable grinding cylinder 4 is used to discharge the liquid generated by the internal material through the drain pipe 12, as well as to discharge the internal material.

[0080] The outer side of the connecting tube 27 is provided with a gear 1 21. The right side of the pulverizing rod 23 extends through the pulverizing tube 4. The outer side of the right end of the pulverizing rod 23 is provided with a gear 2 22. The right side of the pulverizing tube 4 is provided with a fixed rod 25. The outer side of the fixed rod 25 is rotatably provided with a gear 3 26 and a gear 4 24. Gear 3 26 and gear 4 24 are fixedly connected. Gear 1 21 and gear 3 26 are meshed with each other, and gear 2 22 and gear 4 24 are meshed with each other. The transmission of gears 1 21, 22, 3 26, and 4 24 ensures that the rotation speed of the pulverizing rod 23 is greater than that of the connecting tube 27, thereby preventing the scraper 29 from rotating too fast. With only one pulverizing motor 16 to drive the scraper 29 to rotate, it can not only achieve pulverization, beating, and stirring of the material, but also scrape and clean the material adhering to the inner side of the pulverizing tube 4. This structure ensures that the rotation speed of the pulverizing rod 23 is greater than that of the connecting tube 27. This design ensures that the scraper 29 does not rotate too fast, thereby avoiding excessive agitation of the material during the scraping process, while maintaining the stability of the crushing effect. Only one crushing motor 16 drives the entire system, which not only reduces the complexity of the power system but also effectively improves the energy efficiency of the equipment.

[0081] A left support frame 19 and a right support frame 2 are provided between the crushing barrel 4 and the base plate 1. The left support frame 19 and the right support frame 2 are fixed to the base plate 1. The crushing barrel 4 is rotatably positioned on the left support frame 19 and the right support frame 2. A transmission ring 15 is fixedly provided at each end of the crushing barrel 4. The crushing barrel 4 is rotatably connected to the left support frame 19 and the right support frame 2 via the transmission ring 15. The rotational connection between the crushing barrel 4 and the support frame via the transmission ring 15 not only enables the crushing barrel 4 to rotate freely, but also ensures its stability. The design of the support frame enables the crushing barrel 4 to operate stably and can be driven to rotate by the rotating motor 17, ensuring that the material is evenly processed throughout the entire processing process. The combination of the rotating motor 17 and the transmission ring 15 makes the rotation of the crushing barrel 4 more stable and precise, further improving the material crushing effect and production efficiency.

[0082] A heating mechanism 7 is provided at the bottom of the pulverizing cylinder 4 for heating the material inside the pulverizing cylinder 4. A heat dissipation mechanism 8 is provided at the bottom of the outer side of the pulverizing cylinder 4 for dissipating heat inside the pulverizing cylinder 4. The present invention designs a heating and heat dissipation mechanism inside the pulverizing cylinder 4, which heats the material through the heating mechanism 7 and ensures temperature stability through the heat dissipation mechanism 8. This design effectively promotes the separation of oil and fat in black soldier fly protein and the heating treatment of the material, helps to improve the processing quality of black soldier fly protein, and reduces unnecessary fat components. Through the temperature control and heat dissipation mechanism, the temperature changes of the entire process are precisely controlled, avoiding the damage of high temperature to protein and nutrients, and maintaining the nutritional value of the material.

[0083] A discharge channel 9 is provided at the discharge port at the lower part of the front side of the pulverizing barrel 4. A sealing plate 10 that can be opened and closed is provided at the discharge port. A driving mechanism 11 is provided between the sealing plate 10 and the pulverizing barrel 4. The driving mechanism 11 drives the sealing plate 10 to seal and open the discharge port. During the material processing process, the pulverizing barrel 4 is provided with an openable and closable sealing plate 10 and a discharge channel 9. The sealing plate 10 is driven by the driving mechanism 11 to seal and open, thereby ensuring the flexibility and sealing of the discharge process. The material in the pulverizing barrel 4 needs to be discharged regularly during the processing process. This design provides efficient control for the production process and avoids leakage of materials or external contamination during the pulverizing process. Through this sealing control, the quality of the material is better guaranteed, and the safety and stability of the equipment are also improved.

[0084] A rotating motor 17 is provided on the left support plate, and the rotating motor 17 drives the transmission ring 15 to rotate, thereby realizing the rotation of the crushing barrel 4. The middle part of the lower side surface of the cover plate 5 is an arc-shaped structure. After the cover plate 5 is covered on the crushing barrel 4, the cover plate 5 and the inside of the crushing barrel 4 form a cylindrical bin body. The openable and closable cover plate 5 and the scraping function of the inner wall of the crushing barrel 4 of the present application enable the operator to clean the equipment easily, avoiding the black soldier fly protein adhering to the inner wall of the equipment and affecting production. The design of the detachable cover plate 5 is not only convenient for opening and cleaning, but also can effectively prevent the overflow of materials, ensuring the neatness and safety of production. The overall structural design is simple and highly functional, which provides great convenience for the maintenance and cleaning of the equipment during the production process, and reduces manual intervention and cleaning time.

[0085] like Figure 6 As shown; when the present application is used, the fresh black soldier flies are rinsed with clean water to remove surface impurities, and then filtered and steamed at 100°C to achieve preliminary sterilization; then they are pulped, and the sterilized black soldier flies are placed into the crushing cylinder 4 through the feed hopper 6; then they are crushed and pulped by the crushing mechanism; during the crushing and pulping process, the crushing fan blades rotate to crush the black soldier flies. At the same time, in order to avoid the black soldier flies adhering to the inner side wall of the crushing cylinder 4 and the lower surface of the cover plate 5, resulting in poor crushing effect, a scraper is provided to scrape and clean the inner side surface of the crushing cylinder 4 and the lower surface of the cover plate 5, and the scraped black soldier flies can be crushed and pulped again.

[0086] After beating is completed, water is added through the feed hopper 6 to adjust the material to a water content of 70-75%. (Water can be added according to the proportion of the material during adjustment, and there is no technical limitation). During the water addition process, the material and water are stirred and fully mixed by the rotation of the crushing mechanism.

[0087] The inside of the grinding cylinder 4 is heated to 95-100°C by the heating mechanism 7, and the grinding mechanism rotates to achieve the stirring function of the liquid, and the grease is separated after standing; by rotating the grinding cylinder 4 to make it rotate backward, the upper layer of grease in the grinding cylinder 4 is discharged through the upward inclined drain pipe 12 to achieve the separation of grease. The drain pipe 12 is provided to achieve the separation of grease; after the grease separation is completed, the grinding cylinder 4 is reset.

[0088] The insect pulp after oil separation is subjected to enzymatic hydrolysis reaction; after oil separation, alkaline protease is added to the insect pulp according to 0.4-0.8% by weight, the enzymatic hydrolysis temperature is 45-50°C, that is, the material is heated by the heating mechanism 7, and the enzymatic hydrolysis reaction is carried out for 2-3h;

[0089] Then, citric acid is used to adjust the pH to about 7, that is, the pulverizing motor 16 is controlled to drive the pulverizing blades to rotate to fully mix and stir the materials, thereby achieving rapid adjustment of the pH value of the materials. At the same time, a pH sensor 18 is provided at the lower side of the pulverizing cylinder 4 to detect the pH value of the materials. Neutral protease is added at a weight ratio of 0.4-0.8%, and the enzymolysis temperature is 50-55° C., that is, the materials are heated by the heating mechanism 7, and the enzymolysis reaction is carried out for 2-3 hours. The heating mechanism 7 is a prior art method that can heat the materials to a specified temperature range and is not technically limited. At the same time, a temperature sensor 3 is provided to perform temperature correction on the materials heated by the heating mechanism 7, and a temperature sensor 20 is provided to measure the gas temperature at the top of the pulverizing cylinder 4.

[0090] After the enzymatic hydrolysis is completed, the temperature rises to 95-100°C, that is, the material is heated by the heating mechanism 7 to inactivate the enzyme and sterilize it; (Clostridium perfringens can withstand a high temperature of 90°C for 30 minutes and a high temperature of 100°C for 5 minutes).

[0091] After enzyme inactivation and sterilization, the temperature drops to 70°C. When the temperature drops, the heat dissipation mechanism 8 is used to quickly dissipate heat from the pulverizing cylinder 4. (The heat dissipation mechanism 8 can be used to blow the pulverizing cylinder 4 with wind to dissipate heat or to use liquid circulation to quickly exchange heat and cool the outer side of the pulverizing cylinder 4 to achieve rapid cooling of the internal material. The lower side of the pulverizing cylinder 4 is made of a material that can quickly conduct heat, such as iron or other metals. For the existing technology, no technical details will be given. It is sufficient to achieve the cooling function. The heat dissipation function can also be combined with the heating mechanism 7 to be applied to other process steps to achieve rapid temperature control). At the same time, air is pumped outward through the pipe to quickly extract the high-temperature gas in the pulverizing cylinder 4 to achieve rapid cooling of the material in the pulverizing cylinder 4.

[0092] The cooled material is opened by the driving mechanism 11, and the driving gear at the output end of the rotating motor 17 is controlled to drive the driven gear 14 to rotate. The driven gear 14 is fixedly connected to the outer side of the transmission ring 15, thereby driving the crushing drum 4 to rotate. When the crushing drum 4 rotates forward, the material inside can be discharged from the discharge port; the material is then transported to the modulator of the aquatic extruder, and the addition amount is 150-250 kg / ton of aquatic feed, replacing 40-60% of the fish meal in the formula.

[0093] In the present application, the pulverization, beating, mixing, enzymatic hydrolysis, internal temperature control, and oil separation of black soldier flies required for the preparation of black soldier fly protein feed for aquaculture are all performed within the pulverization drum 4, enabling multifunctional integrated processing. By designing an integrated pulverization drum 4, the multi-step processing of black soldier flies can be completed within a closed system, reducing the switching between various links and the use of equipment in traditional processes, improving production efficiency, and reducing energy consumption.

[0094] After initial cleaning, the black soldier fly larvae are first crushed and pulped within a crushing drum 4 by a pulverizing mechanism. During this process, a scraper device ensures the inner wall of the crushing drum 4 is kept clean, preventing black soldier fly larvae from adhering to the wall and affecting the crushing effect. Next, water is added to maintain a moisture content between 70-75%. The rotation of the pulverizing mechanism provides agitation, thoroughly mixing the water with the black soldier fly powder, preparing for the subsequent enzymatic hydrolysis reaction.

[0095] Within the pulverizing drum 4, the material is heated to 95-100°C by a heating mechanism 7, allowing the material to be stirred and mixed at the appropriate temperature, effectively promoting the separation of oil. The oil is then discharged through a drain pipe 12, effectively reducing the fat content of the material, making it more suitable for digestion and absorption by aquatic animals. After oil separation, the material enters the enzymatic hydrolysis process. At the enzymatic hydrolysis temperature, the enzymatic hydrolysis reaction can last for 2-3 hours. Protease and neutral protease are used to further hydrolyze the black soldier fly protein, improving its nutritional value and palatability for aquatic animals.

[0096] In addition, a temperature sensor 1 and a pH sensor 18 are installed within the crushing drum 4 to monitor and adjust the reaction temperature and the pH value of the material in real time, ensuring optimal enzymatic hydrolysis. The entire process is completed within the crushing drum 4, achieving simultaneous control of temperature, enzymatic hydrolysis, oil separation, stirring, and mixing, greatly improving production efficiency and reducing production costs.

[0097] The design of the present invention makes the processing process of black soldier fly protein feed more efficient, energy-saving and highly automated, provides an innovative solution for the production of aquatic feed, helps to improve the utilization rate of black soldier fly protein, and reduces energy consumption and costs in feed production, and has broad application prospects.

[0098] The above functions of controlling and timely adjusting various electrical components through the controller are existing technologies, and no detailed technical description is given. It is sufficient to achieve the functions required by this application; this application mainly protects the device and the device's automatic non-contact monitoring method for animal cardiopulmonary monitoring.

[0099] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A processing technology for black soldier fly protein feed for aquaculture, characterized in that: The method comprises the steps of: washing the fresh black soldier flies with clean water to remove surface impurities, filtering the water and then steaming at 100° C. to achieve preliminary sterilization; S2: Beating, adding water to adjust the water content to 70-75%, heating to 95-100℃, and separating the oil; S3: performing an enzymatic hydrolysis reaction on the insect pulp after oil separation; after the enzymatic hydrolysis is completed, the temperature is raised to 95-100° C. to inactivate the enzyme and sterilize the pulp; S4: After enzyme inactivation and sterilization, the temperature drops to 70°C, and the material is then transported to the aquatic extruder modulator. The addition amount is 150-250 kg / ton of aquatic feed, replacing 40-60% of the fish meal in the formula.

2. The processing technology of a black soldier fly protein feed for aquaculture according to claim 1, characterized in that: The step S2 comprises: S21: The sterilized black soldier flies are placed into a grinding drum through a feed hopper; the black soldier flies are then ground and beaten by a grinding mechanism; S22: After beating, water is added through the feed hopper to adjust the material to a moisture content of 70-75%, and the material and water are stirred during the water addition process to fully mix them; S23: The interior is heated to 95-100°C by the heating mechanism, and the crushing mechanism rotates to achieve the stirring function of the liquid, and the grease is separated after standing. By rotating the crushing cylinder to make it rotate backward, the upper layer of grease in the crushing cylinder is discharged through the upward inclined drainage pipe to achieve grease separation.

3. The processing technology of a black soldier fly protein feed for aquaculture according to claim 1, characterized in that: The step S3 comprises: S31: After the oil is separated, alkaline protease is added to the insect pulp according to 0.4-0.8% by weight, and the enzymatic hydrolysis temperature is 45-50°C, that is, the material is heated by a heating mechanism, and the enzymatic hydrolysis reaction is carried out for 2-3 hours; S32: then adjusting the pH to about 7 with citric acid, adding 0.4-0.8% by weight of neutral protease, and the enzymatic hydrolysis temperature is 50-55°C, that is, heating the material by the heating mechanism, and performing the enzymatic hydrolysis reaction for 2-3 hours; S33: After the enzymatic hydrolysis is completed, the temperature rises to 95-100°C, that is, the material is heated by the heating mechanism.

4. A processing device for black soldier fly protein feed for aquatic products, characterized by: The processing equipment is based on the processing technology of the black soldier fly protein feed for aquaculture according to any one of claims 1 to 3, comprising a bottom plate, on which a grinding cylinder is arranged, the grinding cylinder is placed horizontally, and the grinding cylinder is used to store materials; The upper part of the crushing cylinder is provided with an openable cover, which is convenient for opening the cover to clean the inside later; A feed hopper is provided on the cover plate, and the feed hopper is used to put materials in; A crushing mechanism is arranged horizontally in the crushing cylinder, which is used to crush and stir the materials; The grinding cylinder is rotatably located on the bottom plate; a drainage pipe is provided on the rear side of the grinding cylinder, and a discharge port is provided on the front side of the grinding cylinder. The rotatable grinding cylinder is used to discharge the liquid generated by the internal material through the drainage pipe, as well as to discharge the internal material.

5. The processing equipment for black soldier fly protein feed for aquaculture according to claim 4, characterized in that: The crushing mechanism includes a crushing rod, which is laterally rotatable and located in a crushing cylinder. Crushing blades are provided on the outer side of the crushing rod. The crushing blades rotate along with the crushing rod and crush and stir the material.

6. The processing equipment for black soldier fly protein feed for aquaculture according to claim 5, characterized in that: The pulverizing mechanism further includes a pulverizing motor, which is located on the side of the pulverizing cylinder and drives the pulverizing rod to rotate.

7. The processing equipment for black soldier fly protein feed for aquaculture according to claim 6, characterized in that: The outer side of the crushing rod is rotatably provided with a connecting cylinder, the connecting cylinder rotatably passes through the right side of the crushing cylinder, the outer side of the connecting cylinder is provided with a connecting rod, and the outer end of the connecting rod is connected to the scraping rod.

8. The processing equipment for black soldier fly protein feed for aquaculture according to claim 7, characterized in that: The outer end of the scraper rod is an arc-shaped surface that fits the inner side of the grinding cylinder, and the inner side of the scraper rod is an inclined slope structure.

9. The processing equipment for black soldier fly protein feed for aquaculture according to claim 6, characterized in that: The outer side of the connecting cylinder is provided with gear 1, the right side of the crushing cylinder is penetrated by the crushing rod, the outer side of the right end of the crushing rod is provided with gear 2, the right side of the crushing cylinder is provided with a fixing rod, the outer side of the fixing rod is rotatably provided with gear 3 and gear 4, gear 3 and gear 4 are fixedly connected, gear 1 and gear 3 are meshed with each other, and gear 2 and gear 4 are meshed with each other.

10. The processing equipment for black soldier fly protein feed for aquaculture according to claim 9, characterized in that: The transmission of the gear 1, the gear 2, the gear 3 and the gear 4 enables the rotation speed of the crushing rod to be greater than the rotation speed of the connecting cylinder.

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