Black soldier fly powder pre-digestion device for aquatic feed
By combining screen and crushing roller design with distributed enzymatic hydrolysis and hot air circulation inactivation technology, the problems of clogging, uneven enzymatic hydrolysis and high energy consumption in black soldier fly powder processing have been solved, realizing a high-efficiency, low-energy black soldier fly powder pre-digestion device, which improves digestibility and nutritional value.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NEW HOPE LIUHE
- Filing Date
- 2025-06-12
- Publication Date
- 2026-07-07
AI Technical Summary
Existing equipment for processing black soldier fly powder suffers from problems such as easy clogging of the screen, uneven enzymatic hydrolysis, high energy consumption, large equipment footprint, and complex operation, resulting in low digestibility and failure to fully realize nutritional value.
The design combines a 20-40 mesh screen with a hammer crusher roller, along with distributed enzymatic hydrolysis spraying and 80-90℃ hot air circulation inactivation technology. It also incorporates an integrated design and a synchronous stirring system to achieve uniform mixing and low-energy processing of materials.
It improves the digestibility and nutritional quality of black soldier fly powder, reduces energy consumption, achieves efficient and continuous production, and avoids the problems of clogging and heat loss in traditional equipment.
Smart Images
Figure CN224467802U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of aquatic feed preparation technology, and in particular to a black soldier fly powder pre-digestion device for aquatic feed. Background Technology
[0002] As one of the world's fastest-growing food production sectors, aquaculture is facing a severe challenge from the increasing scarcity of traditional fishmeal resources. According to data from the Food and Agriculture Organization of the United Nations (FAOSTAT), global annual fishmeal production has remained at around 5 million tons for five consecutive years, failing to meet the aquaculture feed demand, which is growing at an annual rate of 8%. This supply-demand imbalance has prompted the industry to accelerate the search for new protein sources, among which insect protein has attracted significant attention due to its sustainable production characteristics and nutritional advantages.
[0003] Black soldier fly powder has attracted much attention due to its high protein content (40%-60%) and rich unsaturated fatty acids. However, black soldier fly bodies contain chitinous exoskeletons and complex lipid structures, resulting in low digestibility for animals when used directly as feed, typically less than 60%, which limits its nutritional value.
[0004] Currently, the industry generally uses mechanical crushing combined with enzymatic hydrolysis for pretreatment, but existing equipment has the following technical bottlenecks: 1) Traditional crusher screens are easily clogged by high-fat insect powder, leading to a decrease in production capacity; 2) Existing enzymatic hydrolysis processes mostly use single-point enzyme addition or static soaking methods, making it difficult for the hydrolysate to penetrate into the material, resulting in insufficient protein release. In addition, uneven mixing of materials during enzymatic hydrolysis leads to insufficient penetration of the hydrolysate, affecting protein release efficiency; 3) The inactivation process relies on steam heating or electric heating plate conduction, which consumes a lot of energy and is prone to heat-sensitive nutrient loss; 4) Currently, most equipment uses separate equipment for crushing, enzymatic hydrolysis, and inactivation. The material transfer process is prone to causing hydrolysate loss and secondary pollution risks, and the equipment occupies a large area and has high operational complexity.
[0005] Solving the aforementioned technical problems is the challenge facing this utility model. Utility Model Content
[0006] To address the shortcomings of existing technologies, this invention provides a pre-digestion device for black soldier fly powder used in aquatic feed. This device significantly improves the digestibility and nutritional quality of black soldier fly powder by optimizing the screen structure, improving the enzymatic hydrolysis spraying method, adopting hot air circulation inactivation technology, and combining integrated design and synchronous stirring system. At the same time, it reduces energy consumption and achieves efficient and continuous production.
[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: This utility model provides a pre-digestion device for black soldier fly powder for aquatic feed, including a crushing mechanism, an enzymatic hydrolysis mechanism and an inactivation mechanism. The crushing mechanism includes a crusher, the input end of which is provided with a feed inlet and the output end is connected to the enzymatic hydrolysis mechanism.
[0008] The enzymatic hydrolysis mechanism is equipped with a spray unit, which is filled with enzymatic hydrolysate. The output end of the enzymatic hydrolysis mechanism is connected to the inactivation mechanism, which is equipped with a heating air group. The output end of the inactivation mechanism is equipped with a discharge port.
[0009] Both the enzymatic hydrolysis mechanism and the inactivation mechanism are equipped with stirring components.
[0010] The crusher is equipped with a housing, and a hammer crushing roller is connected inside the housing via a first drive motor.
[0011] The housing is equipped with a screen, which is 20-40 mesh and has a sieve aperture of 0.85-0.42 mm.
[0012] The output end of the crusher is connected to the enzymatic hydrolysis mechanism through a first feeding valve;
[0013] The enzymatic hydrolysis mechanism includes an enzymatic hydrolysis chamber, and the inactivation mechanism includes an inactivation chamber. Both the enzymatic hydrolysis chamber and the inactivation chamber are horizontally arranged hollow cylindrical structures, and the enzymatic hydrolysis mechanism is located above the inactivation mechanism.
[0014] The top of the enzymatic hydrolysis chamber is connected to the crusher via the first feeding valve.
[0015] The top of the enzymatic hydrolysis chamber is equipped with a pressure relief valve, and at least one set of the spray units is provided on the top of the enzymatic hydrolysis chamber;
[0016] Each of the spray units includes an inlet pipe, which is connected to several outlet pipes that penetrate and are fixed to the enzymatic hydrolysis chamber. Each outlet pipe is connected to a nozzle, which is fixedly installed on the top of the inner wall of the enzymatic hydrolysis chamber.
[0017] The bottom of the enzymatic hydrolysis chamber is connected to the top of the inactivation chamber through several second discharge valves, which are evenly distributed at the bottom of the enzymatic hydrolysis chamber.
[0018] The inactivation chamber has a discharge port at one end via a third discharge valve, and the heating air group is provided at the other end.
[0019] The heating air unit includes a fan, the output end of which is connected to the inactivation chamber via a heater, and the inactivation chamber is also equipped with a pressure relief valve.
[0020] The stirring assembly includes a first stirring shaft disposed in the enzymatic hydrolysis chamber and a second stirring shaft disposed in the inactivation chamber. The first stirring shaft and the second stirring shaft are rotatably connected to the enzymatic hydrolysis chamber and the inactivation chamber, respectively, and are arranged parallel to each other.
[0021] The first stirring shaft and the second stirring shaft are evenly provided with a number of stirring blades.
[0022] The ends of the first stirring shaft and the second stirring shaft pass through the enzymatic hydrolysis chamber and the inactivation chamber and are respectively fixedly connected to a first bevel gear. Both first bevel gears mesh with the second bevel gear, and the second bevel gear is coaxially connected to a second drive motor.
[0023] The second drive motor and bevel gear are both rotatably mounted inside the fixed housing.
[0024] The crusher, enzymatic hydrolysis chamber, fixed shell, and inactivation mechanism are all supported and fixed by brackets.
[0025] The first, second, and third discharge valves are mechanical or electric valves.
[0026] The beneficial effects of this utility model are as follows: This utility model, through the combination design of a 20-40 mesh screen and a hammer crushing roller, ensures that the raw materials are appropriately crushed with a particle size of 0.85-0.42mm, while the screen opening rate is ≥45%, effectively avoiding the clogging problem caused by the melting and sticking of insect powder fat. Compared with traditional fine screens of 60 mesh or above, it can improve production capacity and does not require frequent shutdowns for cleaning. In addition, coarse particles are more conducive to the subsequent penetration of enzymatic hydrolysate, laying the foundation for the full release of protein.
[0027] This invention features a stacked arrangement of the enzymatic hydrolysis chamber and the inactivation chamber. A second discharge valve facilitates gradient material transfer, reducing hydrolysate loss due to mechanical conveying. Distributed nozzles in the spray unit, combined with low-speed stirring by the first stirring shaft, ensure uniform hydrolysate coverage of the material surface, improving hydrolysis efficiency compared to single-point enzyme addition. In the inactivation stage, 80-90℃ hot air circulation from a heated air unit replaces steam heating, reducing energy consumption. The continuous tumbling of the second stirring shaft prevents localized overheating and improves the retention of heat-sensitive nutrients such as lysine. Furthermore, the inactivation chamber utilizes a hot air circulation inactivation system from a heated air unit, offering significant advantages over traditional steam heating or electric heating plate conduction. The hot air, aided by the stirring paddle, creates a turbulent flow field, suspending the material and ensuring uniform heating, thus improving inactivation efficiency and avoiding localized overheating or cold zone residue issues caused by traditional static heating. The 80-90℃ low-temperature hot air provides direct heat exchange, saving energy compared to steam heating. Additionally, directional hot air propels the material towards the discharge port, preventing accumulation and resolving the material jamming problem associated with traditional equipment relying on mechanical scrapers.
[0028] The first and second stirring shafts of this invention are driven by a single second drive motor through a bevel gear set, which not only simplifies the power structure but also ensures the synchronization of stirring in the two chambers, avoids material stagnation caused by speed differences, and the pressure relief valve and heating air group control maintain a slightly positive pressure environment in the chamber to prevent external pollutants from entering. Attached Figure Description
[0029] Figure 1This is the front view of the present invention.
[0030] Figure 2 This is a three-dimensional structural diagram of the present invention.
[0031] Figure 3 This is a schematic diagram of the internal structure of the crusher of this utility model. Figure 1 .
[0032] Figure 4 This is a schematic diagram of the internal structure of the crusher of this utility model. Figure 2 .
[0033] Figure 5 This is a three-dimensional structural diagram of the stirring assembly of this utility model.
[0034] The attached figures are labeled as follows: 1. Crushing mechanism; 101. Crusher; 102. Feed inlet; 103. Shell; 104. Hammer crusher roller; 105. First drive motor; 106. Screen; 107. First discharge valve; 2. Enzymatic hydrolysis mechanism; 201. Enzymatic hydrolysis chamber; 202. Pressure relief valve; 203. Liquid inlet pipe; 204. Liquid outlet pipe; 205. Second discharge valve; 3. Inactivation mechanism; 301. Discharge port; 302. Inactivation chamber; 4. Heating air group; 401. Fan; 402. Heater; 5. Fixed shell; 501. First stirring shaft; 502. Second stirring shaft; 503. Stirring paddle; 504. First bevel gear; 505. Second bevel gear; 506. Second drive motor. Detailed Implementation
[0035] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.
[0036] See Figures 1 to 5 As shown, this embodiment is a pre-digestion device for black soldier fly powder used in aquatic feed, including a crushing mechanism 1, an enzymatic hydrolysis mechanism 2, and an inactivation mechanism 3. The crushing mechanism 1 includes a crusher 101, which is equipped with a housing 103. A hammer crushing roller 104 is connected to the housing 103 through a first drive motor 105. A screen 106 is provided inside the housing 103. The screen 106 is 20-40 mesh with a sieve aperture of 0.85-0.42 mm. The input end of the crusher 101 is provided with a feed inlet 102, and the output end is connected to the enzymatic hydrolysis mechanism 2. The output end of the crusher 101 is connected to the enzymatic hydrolysis mechanism 2 through the first discharge valve 107. The enzymatic hydrolysis mechanism 2 includes an enzymatic hydrolysis chamber 201, and the inactivation mechanism 3 includes an inactivation chamber 302. Both the enzymatic hydrolysis chamber 201 and the inactivation chamber 302 are horizontally arranged hollow cylindrical structures, and the enzymatic hydrolysis mechanism 2 is located above the inactivation mechanism 3. The top of the enzymatic hydrolysis chamber 201 is connected to the crusher 101 through the first discharge valve 107.
[0037] The enzymatic hydrolysis mechanism 2 is equipped with a spray unit, which is filled with enzymatic hydrolysate. The top of the enzymatic hydrolysis chamber 201 is equipped with a pressure relief valve 202. The top of the enzymatic hydrolysis chamber 201 is equipped with at least one set of spray units. Each set of spray units includes an inlet pipe 203. The inlet pipe 203 is connected to several outlet pipes 204 that penetrate and are fixed to the enzymatic hydrolysis chamber 201. Each outlet pipe 204 is connected to a nozzle, which is fixedly installed on the top of the inner wall of the enzymatic hydrolysis chamber 201.
[0038] The output end of the enzymatic hydrolysis mechanism 2 is connected to the inactivation mechanism 3. The bottom of the enzymatic hydrolysis chamber 201 is connected to the top of the inactivation chamber 302 through several second feeding valves 205. The second feeding valves 205 are evenly distributed at the bottom of the enzymatic hydrolysis chamber 201. The inactivation mechanism 3 is equipped with a heating air group 4. The output end of the inactivation mechanism 3 is equipped with a feeding port 301. The bottom of one end of the inactivation chamber 302 is equipped with a feeding port 301 through a third feeding valve. The other end is equipped with a heating air group 4. The heating air group 4 includes a fan 401. The output end of the fan 401 is connected to the inactivation chamber 302 through a heater 402. The inactivation chamber 302 is also equipped with a pressure relief valve.
[0039] Both the enzymatic hydrolysis mechanism 2 and the inactivation mechanism 3 are equipped with stirring components. The stirring components include a first stirring shaft 501 in the enzymatic hydrolysis chamber 201 and a second stirring shaft 502 in the inactivation chamber 302. The first stirring shaft 501 and the second stirring shaft 502 are rotatably connected to the enzymatic hydrolysis chamber 201 and the inactivation chamber 302, and are arranged parallel to each other. A plurality of stirring paddles 503 are evenly distributed on the first stirring shaft 501 and the second stirring shaft 502. The ends of the first stirring shaft 501 and the second stirring shaft 502 pass through the enzymatic hydrolysis chamber 201 and the inactivation chamber 302 and are respectively fixedly connected to a first bevel gear 504. Both first bevel gears 504 mesh with a second bevel gear 505. The second bevel gear 505 is coaxially connected to a second drive motor 506. The second drive motor 506 and the bevel gears are rotatably arranged in the fixed housing 5.
[0040] The crusher 101, enzymatic hydrolysis chamber 201, fixed shell 5 and inactivation mechanism 3 are all supported and fixed by brackets. The first discharge valve 107, the second discharge valve 205 and the third discharge valve are mechanical or electric valves.
[0041] In actual use, the dried black soldier fly larvae are first fed into the crusher 101 through the feed inlet 102. The hammer crusher roller 104 is driven by the first drive motor 105 to rotate at high speed, crushing the raw material into coarse particles. After being screened by the screen 106, the material enters the enzymatic hydrolysis chamber 201 through the first discharge valve 107. During the enzymatic hydrolysis process, the liquid inlet pipe 203 of the spray unit sprays the enzymatic hydrolysis liquid evenly into the enzymatic hydrolysis chamber (201). At the same time, the first stirring shaft 501 drives the stirring paddle 503 to stir at low speed to ensure that the material and the enzymatic hydrolysis liquid are fully mixed. The pressure relief valve 202 maintains the pressure inside the chamber. After the enzymatic hydrolysis is completed, the material enters the inactivation chamber 302 below through the second discharge valve 205. The blower 401 of the heating air unit 4 heats the air to 80-90℃ via the heater 402 and blows it into the inactivation chamber 302. The second stirring shaft 502 stirs synchronously, which quickly inactivates the enzyme and prevents clumping. The inactivated insect powder is finally discharged from the discharge port 301 through the third discharge valve, completing the pre-digestion treatment. In the whole process, the three stages of crushing, enzymatic hydrolysis and inactivation are controlled by valve linkage to ensure continuous production. The stirring components adopt bevel gear transmission to realize the synchronous drive of the two chambers. The structure is compact and efficient. This device is particularly suitable for the pretreatment of high-fat black soldier fly powder. The 20-40 mesh anti-clogging design of the screen and the stepped temperature control inactivation of the heating air unit 4 significantly improve the protein digestibility and product stability.
[0042] The technical features of this utility model not described can be implemented by or by using existing technology, and will not be repeated here. Of course, the above description is not a limitation of this utility model, and this utility model is not limited to the examples above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model should also be within the protection scope of this utility model.
Claims
1. A black soldier fly larvae powder pre-digestion device for aquatic feed, characterized by, Including the smashing mechanism (1), the enzymolysis mechanism (2) and the inactivation mechanism (3), the smashing mechanism (1) includes the crusher (101), the crusher (101) input end is provided with the feed inlet (102), the output end is connected with the enzymolysis mechanism (2); The enzymolysis mechanism (2) is provided with a spraying unit, the spraying unit is infused with enzymolysis liquid, the output end of the enzymolysis mechanism (2) is connected with the inactivation mechanism (3), the inactivation mechanism (3) is provided with a heating air group (4), and the output end of the inactivation mechanism (3) is provided with a discharge port (301); The enzymolysis mechanism (2) and the inactivation mechanism (3) are provided with stirring assemblies.
2. The black soldier fly larvae powder pre-digestion device for aquatic feed according to claim 1, characterized by, The crusher (101) is provided with a shell (103), the shell (103) is connected with a hammer crusher roller (104) by a first driving motor (105) in the shell (103); The shell (103) is provided with a screen (106).
3. The black soldier fly (Hermetia illucens) pre-digested powder device for aquaculture feed according to claim 1, wherein, The output end of the crusher (101) is connected with the enzymolysis mechanism (2) through a first discharge valve (107); The enzymolysis mechanism (2) includes an enzymolysis bin (201), and the inactivation mechanism (3) includes an inactivation bin (302), the enzymolysis bin (201) and the inactivation bin (302) are both hollow cylindrical structures arranged horizontally, and the enzymolysis mechanism (2) is located above the inactivation mechanism (3); The top of the enzymolysis bin (201) is connected with the crusher (101) through the first discharge valve (107).
4. The black soldier fly larvae powder pre-digestion apparatus for aquaculture feed according to claim 3, characterized by, The top of the enzymolysis bin (201) is provided with a pressure relief valve (202), and the top of the enzymolysis bin (201) is provided with at least one set of spraying units; Each set of spraying units includes a liquid inlet pipe (203), a plurality of liquid outlet pipes (204) are communicated and fixed to the enzymolysis bin (201), each liquid outlet pipe (204) is connected with a spray head, and the spray head is fixedly arranged on the inner wall top of the enzymolysis bin (201).
5. The black soldier fly larvae powder pre-digestion apparatus for aquaculture feed according to claim 3, characterized by, The bottom of the enzymolysis bin (201) is connected with the top of the inactivation bin (302) through a plurality of second discharge valves (205), and the second discharge valves (205) are evenly arranged on the bottom of the enzymolysis bin (201).
6. The black soldier fly larvae powder pre-digestion apparatus for aquaculture feed according to claim 5, wherein One end of the inactivation bin (302) is provided with the discharge port (301) through a third discharge valve, and the other end is provided with the heating air group (4). The heating air group (4) includes a fan (401), the output end of the fan (401) is connected with the inactivation bin (302) through a heater (402), and the inactivation bin (302) is also provided with a pressure relief valve.
7. The black soldier fly larvae powder pre-digestion apparatus for aquaculture feed according to claim 3, wherein The stirring assemblies include a first stirring shaft (501) arranged in the enzymolysis bin (201) and a second stirring shaft (502) arranged in the inactivation bin (302), the first stirring shaft (501) and the second stirring shaft (502) are rotatably connected with the enzymolysis bin (201) and the inactivation bin (302) respectively, and are arranged in parallel with each other. A plurality of stirring paddles (503) are evenly arranged on the first stirring shaft (501) and the second stirring shaft (502).
8. The black soldier fly larvae powder pre-digestion device for aquaculture feed according to claim 7, characterized by, The end of the first stirring shaft (501) and the end of the second stirring shaft (502) penetrate the enzymolysis bin (201) and the inactivation bin (302), and are fixedly connected with first bevel gears (504), respectively; the two first bevel gears (504) are engaged with a second bevel gear (505), and the second bevel gear (505) is coaxially connected with a second driving motor (506). The second driving motor (506) and the bevel gears are rotationally arranged in the fixed shell (5).
9. The black soldier fly larvae powder pre-digestion apparatus for aquaculture feed according to claim 8, characterized by, The crusher (101), the enzymolysis bin (201), the fixed shell (5) and the inactivation mechanism (3) are all supported and fixed by the support.
10. The black soldier fly larvae powder pre-digestion apparatus for aquaculture feed according to claim 6, wherein The first, second and third discharge valves are mechanical or electric valves.