A premix for large yellow croaker and a production process thereof

Abstract

The application discloses a production process of a large yellow croaker premix, and a formula of the large yellow croaker premix comprises solid raw materials and liquid raw materials; the production process comprises the following steps: raw material pretreatment, the solid raw materials are crushed to a particle size of 0.1-0.4 mm; preliminary mixing, the crushed solid raw materials are mixed to form a uniform mixture; secondary mixing, the liquid raw materials are added to the mixture and mixed to ensure uniform distribution; granulation is performed through a granulator, and the prepared particles are cooled and dried; the particles are coated to add sensitive components; quality control detection is performed on the product, and the product is packaged and stored; the production process has beneficial effects in improving mixing uniformity, enhancing particle stability, ensuring the quality of sensitive components, improving production efficiency, strengthening quality control, improving raw material utilization and realizing accurate component control, and the like. The quality, reliability and market competitiveness of the large yellow croaker premix can be improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of feed for aquaculture, specifically a large yellow croaker premix and production process. BACKGROUND

[0002] Large yellow croaker premix is an important additive for feeding large yellow croaker or other fish. These premixes usually contain a variety of vitamins, minerals and other nutrients to ensure the healthy growth and development of fish. Large yellow croaker premix generally has solid raw materials and liquid raw materials, and the traditional production process usually adds all the raw materials and then stirs and mixes them. However, this process has some defects that are difficult to notice:

[0003] Uneven mixing: mixing solid raw materials and liquid raw materials together at the beginning and then stirring them can lead to uneven mixing. Because the liquid raw materials can form clumps on the surface or inside the solid raw materials, it is difficult to evenly disperse. Uneven mixing can lead to local concentration differences in the premix, affecting the quality and balance of the product.

[0004] Solid raw material wetting: mixing solid raw materials and liquid raw materials together at the beginning can cause the solid raw materials to be wet at the beginning, which is not conducive to the processing of some raw materials. Wet solid raw materials can increase the stickiness and increase the complexity of the mixing process.

[0005] Viscosity problems: the viscosity of liquid raw materials is different, which can lead to uneven viscosity during stirring. High-viscosity liquid raw materials can increase the difficulty of mixing and reduce the mixing efficiency.

[0006] Not suitable for some raw materials: some solid raw materials may be sensitive to liquid raw materials, and mixing them at the beginning can cause chemical reactions or degradation, which can damage the stability and quality of the raw materials.

[0007] It is difficult to control the mixing parameters: mixing solid and liquid raw materials at the beginning can make it more difficult to control the mixing parameters, such as stirring speed, time and temperature. More complex process control is needed to ensure consistency and quality.

[0008] In summary, mixing solid raw materials and liquid raw materials together at the beginning can cause a series of problems and hazards such as uneven mixing, particle problems, wetting and viscosity problems, chemical reactions or degradation problems, and mixing parameter control problems. SUMMARY

[0009] The present application aims to provide an improved large yellow croaker premix and its production process, which brings multiple beneficial effects in improving mixing uniformity, enhancing particle stability, ensuring the quality of sensitive ingredients, improving production efficiency, strengthening quality control, improving raw material utilization, and achieving precise ingredient control. These improvements are expected to improve the quality, reliability, and market competitiveness of large yellow croaker premix.

[0010] The technical solutions adopted by the present application are as follows:

[0011] A production process for a large yellow croaker premix, the formula of the large yellow croaker premix includes solid raw materials and liquid raw materials; the production process includes the following steps:

[0012] Raw material pretreatment, the solid raw materials are crushed to a particle size of 0.1-0.4mm;

[0013] Primary mixing, the crushed solid raw materials are mixed to form a uniform mixture;

[0014] Secondary mixing, liquid raw materials are added to the mixture and mixed to ensure uniform distribution;

[0015] Granulation is performed by a granulator, and the prepared granules are cooled and dried;

[0016] The granules are coated to add sensitive ingredients;

[0017] The product is subjected to quality control detection, and is packaged and stored.

[0018] Among them, each kilogram of large yellow croaker premix includes the following ingredients and their weight percentage ranges, the solid raw materials include: vitamin A acetate: 200000-300000IU; vitamin D3: 100000-150000IU; dl-alpha-tocopherol acetate: 5000-7000mg; nicotinamide bisulfite: 330-400mg; thiamine nitrate: 500-600mg; riboflavin: 860-1000mg; pyridoxine hydrochloride: 650-800mg; cyanocobalamin: 5-10mg; inositol: 5500-7000mg; L-ascorbic acid-2-phosphate: 18000-20000mg; nicotinamide: 5000-6000mg; D-calcium pantothenate: 2100-2500mg; folic acid: 85-100mg; D-biotin: 5-10mg; copper: 290-350mg; iron: 2500-3000mg; manganese: 730-800mg; zinc: 5300-6000mg; iodine: 130-150mg; selenium: 23-30mg; cobalt: 80-100mg; ethoxyquin: 0-3000mg; dibutylhydroxytoluene: 0-1000mg;

[0019] The liquid raw materials include fish oil 10000-20000mg, linseed oil 5000-10000mg, liquid lysine 2000-4000mg, liquid methionine 1000-2000mg, citric acid solution 500-1000mg, lecithin 500-1000mg, and sugar syrup 3000-5000mg.

[0020] The preliminary mixing is performed for 15-20 minutes, and the secondary mixing is performed for 5-10 minutes after the preliminary mixing.

[0021] The preliminary mixing and the secondary mixing are performed by using a composite mixing device, which comprises a flat stirring barrel and a stirring mechanism arranged in the stirring barrel. The bottom of the stirring barrel is of an elastic stretchable structure. The stirring mechanism comprises a vertical main shaft and a plurality of upper stirring rods, middle stirring rods and lower stirring rods uniformly arranged around the main shaft. The main shaft is driven to rotate by an electric motor. The upper stirring rods, the middle stirring rods and the lower stirring rods are respectively provided with stirring blades. An upper fixed block is fixedly sleeved on the upper portion of the main shaft, and a lower sliding block is slidably sleeved on the lower portion of the main shaft. One end of each of the upper stirring rods is hingedly connected to the upper fixed block, and the other end thereof is hingedly connected to one end of each of the middle stirring rods. One end of each of the lower stirring rods is rotatably connected to the lower sliding block, and the other end thereof is connected to the other end of each of the middle stirring rods by a universal joint. Under normal circumstances, the upper stirring rods, the middle stirring rods, the lower stirring rods and the main shaft enclose a rectangular frame. An upper end of a sleeve, which is arranged outside the main shaft and has an inner diameter greater than the diameter of the main shaft, is fixedly connected to the lower sliding block, and a lower end thereof passes downward from the middle portion of the elastic stretchable structure. The sleeve and the elastic stretchable structure are fixedly connected by a rigid connecting ring. A hydraulic telescopic rod drives the sleeve to move downward, and drives the middle portion of the elastic stretchable structure to be stretched downward into a conical shape.

[0022] The elastic stretchable structure is further provided below with a removable impact mechanism. The impact mechanism comprises a plurality of impact heads which can be independently extended upward and downward to impact the elastic stretchable structure upward during stirring.

[0023] The lower sliding block is a hollow structure, and a slit is formed in the vertical position corresponding to the lower stirring rod for the up-down rotation of the lower stirring rod; one end of the lower stirring rod extends into the lower sliding block through the slit, and the end extending into the lower sliding block is fixed with a linkage head; the linkage head is a taper with an outer convex arc surface, and an outer convex thread is arranged on the outer convex arc surface; the lower end of the lower sliding block is open, and a lower convex upper limiting structure and an upper convex lower limiting structure are arranged on the lower sliding block corresponding to the linkage head to limit the movement of the linkage head; the outer surface of the lower sliding block is further covered with an elastic sealing layer to shield the slit; the lower part of the main shaft is further rotationally sleeved with a driving disc; the driving disc is driven to rotate by a downward extending driving pipe rotationally sleeved on the outer main shaft; the diameter of the driving disc and the driving pipe is smaller than the inner diameter of the sleeve so that they do not interfere with the movement of the sleeve; an annular inner concave arc surface is formed on the outer convex arc surface of the driving disc corresponding to the linkage head; an outer convex thread is arranged on the annular inner concave arc surface and can be engaged with the outer convex thread on the linkage head to interfere with each other, so that the linkage head is driven to rotate during the rotation of the driving disc; the hydraulic telescopic rod drives the sleeve to move downward to the annular inner concave arc surface of the driving disc.

[0024] The composite mixing method of the composite mixing device comprises the following steps:

[0025] ①The material to be stirred is poured into the stirring barrel from the upper part, the motor is started to drive the rotation of the main shaft, and the main shaft drives the stirring mechanism to rotate in the horizontal direction in sequence through the upper fixed block, the upper stirring rod, the middle stirring rod and the lower stirring rod to stir and mix the material; in this process, the controller controls the respective impact heads to stretch and contract upward and downward to impact the elastic stretchable structure, so that the material at the bottom is bounced up, and the entire elastic stretchable structure is not lowered as a whole;

[0026] ②After stirring for a certain period of time, the controller controls the hydraulic telescopic rod to drive the sleeve to move downward, drives the middle part of the elastic stretchable structure to be stretched downward to be conical, until the linkage head is fitted with the annular inner concave arc surface of the driving disc, and at the same time, the lower sliding block drives the lower stirring rod, the middle stirring rod and the upper stirring rod to be turned downward in sequence to fit the shape of the deformed stirring barrel; at this time, the main shaft still drives the stirring mechanism to rotate horizontally as a whole; at the same time, due to the interference engagement of the outer threads on the linkage head and the driving disc, the driving pipe drives the driving disc to rotate, and in turn drives the linkage head to rotate, so that the lower stirring rod rotates around the main shaft while the stirring mechanism rotates as a whole.

[0027] As described above, due to the adoption of the above technical scheme, the present application has the following advantages:

[0028] 1、The premix for large yellow croaker and the production process thereof have the following advantages:

[0029] Uniform mixing: By crushing the solid raw materials to a particle size of 0.1-0.4mm and performing preliminary mixing, the uniform mixing of the raw materials is ensured. This helps to eliminate quality differences between batches and ensures that the ingredients in the premix are evenly distributed.

[0030] Particle stability: By using a granulator for granulation, cooling, and drying processes, the stability of the particles is ensured. This helps to prevent irregular shapes of the particles, uneven size distribution, and other issues, improving the physical properties and stability of the premix.

[0031] Coating addition: By coating the particles, sensitive ingredients (such as vitamins) are added and ensured to be evenly distributed. This helps to maintain the quality and activity of sensitive ingredients in the premix to meet the nutritional needs of large yellow croakers.

[0032] Production efficiency: Each step in the process is carefully designed to improve production efficiency. For example, the time control of preliminary mixing and secondary mixing is reasonable, avoiding unnecessary time waste. This helps to reduce production costs and increase output.

[0033] Quality control: Quality control testing is performed at different stages of the process to ensure the quality and consistency of the final product. This helps to reduce the risk of quality problems and product returns.

[0034] In summary, the production process of the present invention brings many beneficial effects in improving mixing uniformity, enhancing particle stability, ensuring the quality of sensitive ingredients, improving production efficiency, strengthening quality control, improving raw material utilization, and achieving precise ingredient control. These improvements are expected to improve the quality, reliability, and market competitiveness of large yellow croaker premix.

[0035] 2、In the process of the present invention, the solid raw materials are first mixed, and then the liquid raw materials are added for mixing, which brings some important beneficial effects:

[0036] Improved mixing uniformity: First, the solid raw materials are preliminarily mixed, which helps to ensure that the solid ingredients are fully mixed and form a uniform mixture. This is because the solid raw materials usually have relatively small adhesion between them, making it easy to mix uniformly. After that, the liquid raw materials are added and secondarily mixed, further ensuring that the liquid ingredients are fully mixed with the already mixed solid raw materials. As a result, the various ingredients in the premix are more evenly distributed, improving the balance of the product.

[0037] Reducing waste of liquid raw materials: By first mixing the solid raw materials, the waste of liquid raw materials can be reduced. If the liquid raw materials are mixed with the solid raw materials at an early stage, some of the liquid raw materials may adhere to the surface of the equipment or not be effectively absorbed by the solid raw materials. However, by adding liquid raw materials in the secondary mixing stage, the liquid ingredients can be better absorbed and mixed with the solid ingredients, minimizing waste.

[0038] Avoiding wetting issues with solid ingredients: Separating the mixing of solid and liquid ingredients can reduce the wetting issues of solid ingredients. If solid ingredients are wetted in the early stages of liquid ingredients, it can lead to increased stickiness, making the mixing process more complex. By first performing a preliminary mixing of solid ingredients, the wetting process can be delayed, making mixing easier.

[0039] 3、The formula of the present application has obvious effect:

[0040] Vitamin A Acetate: Vitamin A is essential for the growth and immune system function of large yellow croaker. It helps maintain vision, skin, and mucous membrane health.

[0041] Vitamin D3: Vitamin D3 is crucial for calcium absorption and bone health. It helps large yellow croaker maintain bone structure and calcium balance.

[0042] Vitamin E (dl-alpha-tocopheryl acetate): Vitamin E is an antioxidant that helps protect cells from oxidative damage.

[0043] Vitamin B Complex (Nicotinamide Sulfate, Thiamine Mononitrate, Riboflavin, Pyridoxine Hydrochloride): These vitamins are essential for metabolism, energy production, and nervous system function.

[0044] Vitamin C (L-Ascorbic Acid-2-Phosphate): Vitamin C is an antioxidant that also helps with collagen synthesis and immune system function.

[0045] Nicotinamide: Nicotinamide is part of the B vitamin complex and plays an important role in energy metabolism and cell health.

[0046] Calcium Pantothenate: Calcium pantothenate is also part of the B vitamin complex and is essential for fatty acid metabolism and cell growth.

[0047] Folic Acid: Folic acid plays a key role in cell division and DNA synthesis.

[0048] Biotin: Biotin is essential for carbohydrate, fat, and protein metabolism.

[0049] Fish Oil: Fish oil is a source of omega-3 fatty acids that are beneficial for the growth and immune system of large yellow croaker.

[0050] Flaxseed Oil: Flaxseed oil is also rich in omega-3 fatty acids and helps maintain cardiovascular health in fish.

[0051] Lysine and Methionine: These two amino acids are essential for protein synthesis and growth in large yellow croaker.

[0052] Citric acid solution: Citric acid can be used as an acidity regulator to ensure the pH balance of the mixture.

[0053] Lecithin: Lecithin is a lipid that aids in the structure of cell membranes and digestion in fish.

[0054] Sugar syrup: Sugar syrup can be used as a binder or sweetener to enhance the flavor and palatability of the mixture.

[0055] Vitamin D3 helps promote calcium absorption, while Vitamin A aids in maintaining bone and skin health. Their synergistic effects contribute to the skeletal health of fish.

[0056] Vitamin E and other antioxidant vitamins, such as Vitamin C, work together to protect cells from oxidative damage.

[0057] B vitamins work synergistically in energy metabolism, aiding in the metabolism and nervous system function of large yellow croaker.

[0058] In summary, these different ingredients in the large yellow croaker premix have various important functions, including providing key nutrients, promoting growth, maintaining bone health, protecting cells, maintaining immune system function, and supporting metabolism. Their synergistic effects contribute to the overall health and growth of large yellow croaker.

[0059] 4、The compound mixing device is designed for the preliminary mixing and secondary mixing in the production process of the large yellow croaker premix, and has the following advantages:

[0060] The compound mixing device in the application is designed in two states: vertical state and conical state, which are suitable for the preliminary mixing stage and the secondary mixing stage, respectively.

[0061] Vertical state - preliminary mixing stage (solid material mixing):

[0062] In the vertical state, the stirring barrel is in a vertical form, similar to a traditional vertical mixer, suitable for the preliminary mixing of solid materials.

[0063] Efficient material flow: The vertical state promotes the flow of materials in the vertical direction, which helps to quickly and uniformly mix solid materials of different densities and particle sizes, such as vitamins, trace elements, and bran.

[0064] Reduced material loss: The vertical stirring barrel design reduces material loss during loading and unloading, especially for light or easily airborne powder materials.

[0065] Improved mixing uniformity: Vertical mixers generally provide good up-and-down material flow, ensuring that all solid materials are thoroughly mixed, improving the uniformity and quality of the premix.

[0066] Conical State - Secondary Mixing Phase (Adding Liquid Ingredients):

[0067] When entering the secondary mixing phase, where liquid ingredients need to be added, the stirring barrel transitions into a conical state, similar to a conical mixer, suitable for mixing liquids and solids.

[0068] Enhanced Liquid Distribution: The conical state promotes the formation of centripetal forces, allowing the added liquid ingredients to be distributed faster and more evenly among the solid ingredients, improving the uniformity and efficiency of the mixing process.

[0069] Reduced Material Deposition: The conical bottom reduces dead corners, preventing material deposition and clumping, ensuring that all ingredients participate in the mixing process, improving product quality.

[0070] Adaptability to Different Viscosities: Liquid additives can have different viscosities and flow characteristics. The conical state allows for better adaptation to liquids of different viscosities by adjusting the stirring angle and intensity, ensuring the effectiveness of the mixing process.

[0071] Through this design, the compound mixing device can provide the most suitable mixing environment in different production stages, ensuring high-quality premix and high efficiency of the production process. The vertical state provides gentle and uniform mixing for solid ingredients, while the conical state optimizes the environment for the rapid and even dispersion of liquid additives. This flexibility and adaptability are unmatched by traditional single-type mixers, making the compound mixing device of the invention an important technological innovation to improve the quality and production efficiency of large yellow croaker premix.

[0072] 5、The compound mixing device of the invention achieves multi-dimensional stirring action through unique design, including the elastic stretchable structure pulling the stirring rod to adapt to shape changes, and the interference engagement of the linkage head and the driving disc to realize the rotation of the stirring rod.

[0073] Deformation adaptability brought by elastic stretchable structure:

[0074] Enhanced mixing effect: When the elastic stretchable structure deforms, the stirring rod correspondingly flips down, changing the contact angle and path of the stirring blades with the material, achieving more thorough and comprehensive mixing. This helps to reduce dead corners and ensure uniform mixing of all materials.

[0075] Adaptability to different stages: Smooth transition between the initial mixing phase (vertical state) and the secondary mixing phase (conical state) allows the device to seamlessly adapt to the needs of different mixing stages, improving operational flexibility and efficiency.

[0076] Dynamic adaptation of stirring rod flipping:

[0077] Dynamic adjustment of mixing mode: The flipping action of the upper, middle, and lower stirring rods allows the stirring mechanism to dynamically adjust its mixing mode according to changes in the shape of the mixing barrel. This adaptive capability ensures that mixing remains efficient and uniform regardless of changes in barrel shape.

[0078] Reduced material loss: Adaptive flipping reduces material splashing and leakage during mixing, thereby reducing the loss of raw materials and potential cleaning needs.

[0079] Multi-dimensional stirring resulting from the interference engagement of the linkage head and the drive disc:

[0080] Achieving compound stirring action: The lower stirring rod not only rotates with the entire stirring mechanism (revolution), but also can achieve its own rotation (rotation). This compound action greatly enhances the three-dimensional dynamics of stirring, effectively improving the mixing effect, especially when mixing liquids and solids.

[0081] Improved mixing efficiency and speed: The combination of rotation and revolution produces more complex flow patterns, accelerating the mutual dispersion and fusion of materials, thereby achieving the desired mixing effect in a shorter time.

[0082] Protecting sensitive materials: Compound stirring action reduces damage to sensitive materials (such as vitamins and probiotics) through more gentle and uniform distribution of force, maintaining their activity and effectiveness.

[0083] Overall improvement in mixing quality and production efficiency:

[0084] Reducing operation steps: Through a complex mechanical action, seamless transition from primary mixing to secondary mixing is achieved, reducing intermediate steps and operational complexity, improving production efficiency.

[0085] Improving product quality: More uniform and comprehensive mixing ensures high-quality final products, improving market competitiveness and consumer satisfaction.

[0086] In summary, the design of the compound mixing device in this invention provides dynamic adjustment of stirring rod flipping and compound stirring action, achieving efficient, uniform, and material-friendly mixing results. These beneficial effects collectively improve the production efficiency and product quality of large yellow croaker premix.

[0087] 6、The compound mixing device in this invention is equipped with an impact mechanism, which includes multiple impact heads that can be extended and retracted up and down, used to impact the elastic stretchable structure during mixing.

[0088] Enhanced mixing power:

[0089] Dynamic Impact: The impact mechanism provides a dynamic impact force that helps break up material clumps, ensuring uniform dispersion and mixing of the material.

[0090] Improved Mixing Efficiency: The impact action accelerates the mixing process, making it more rapid and thorough, thereby reducing mixing time and increasing production efficiency.

[0091] Reduced Material Deposition:

[0092] Prevents Bottom Deposition: During mixing, material sometimes deposits at the bottom of the container. The impact head of the impact mechanism effectively impacts the bottom, preventing material deposition and ensuring all material participates in the mixing.

[0093] Avoids Dead Corners: Through the impact on the elastically stretchable structure, the impact mechanism helps change the flow path of the material in the mixing drum, reducing mixing dead corners and improving mixing uniformity.

[0094] Improves Material Flowability:

[0095] Promotes Material Circulation: The movement of the impact mechanism pushes the up-and-down circulation flow of the material, especially for sticky or high-humidity materials, which helps avoid material aggregation and clumping.

[0096] Optimizes Mixing Effect: The up-and-down movement of the impact head combined with the rotation of the stirring mechanism forms a complex flow pattern, which helps more evenly disperse various additives and raw materials.

[0097] Improves Equipment Adaptability and Flexibility:

[0098] Adapts to Different Material Characteristics: The strength and frequency of the impact mechanism can be adjusted according to the characteristics of different materials, allowing the device to flexibly adapt to the mixing needs of various materials.

[0099] Easy to Control and Adjust: According to the real-time needs of the mixing process, the operator can adjust the movement mode (such as frequency, strength, and duration) of the impact head to achieve the best mixing effect.

[0100] Improves Maintenance and Cleaning Efficiency:

[0101] Prevents Material Adhesion: Long-term stirring may cause material to adhere to the inner wall of the mixing drum or certain components. The movement of the impact mechanism helps reduce such adhesion, making cleaning and maintenance easier.

[0102] Extends Equipment Life: By maintaining good material flowability and preventing material deposition, the impact mechanism helps reduce mechanical wear and tear, extending the service life of the equipment.

[0103] Overall, the addition of the impact mechanism provides additional power and flexibility to the composite mixing device, significantly improves the mixing effect, reduces material deposition and caking, and enhances the adaptability and maintenance efficiency of the equipment, thereby improving the production quality and efficiency of large yellow croaker premix while reducing operation and maintenance costs. BRIEF DESCRIPTION OF DRAWINGS

[0104] Figure 1 A process schematic diagram for the production of the large yellow croaker premix of the present application;

[0105] Figure 2 A structural schematic diagram of the composite mixing device in a vertical state;

[0106] Figure 3 A Figure 2 enlarged view of the circle;

[0107] Figure 4 A structural schematic diagram of the composite mixing device in a conical state;

[0108] Figure 5 A Figure 4 enlarged view of the circle.

[0109] Markings in the figure: 1, stirring barrel; 101, elastic stretchable structure; 2, stirring mechanism; 201, main shaft; 202, upper stirring rod; 203, middle stirring rod; 204, lower stirring rod; 205, upper fixed block; 206, lower sliding block; 207, stirring blade; 208, sleeve; 209, rigid connection ring; 210, upper limiting structure; 211, lower limiting structure; 212, elastic sealing layer; 213, driving disc; 214, annular concave arc surface; 215, universal joint; 216, driving pipe; 217, linkage head; 3, impact mechanism; 301, impact head. DETAILED DESCRIPTION

[0110] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0111] Referring to Figure 1 , a production process of large yellow croaker premix, the formula of the large yellow croaker premix includes solid raw materials and liquid raw materials; the production process includes the following steps:

[0112] Raw material pretreatment, the solid raw materials are crushed to a particle size of 0.1-0.4mm;

[0113] Primary mixing, the crushed solid raw materials are mixed to form a uniform mixture;

[0114] Secondary mixing, liquid raw materials are added to the mixture, and mixing is carried out to ensure uniform distribution;

[0115] Granulation is carried out by a granulator, and the prepared granules are cooled and dried;

[0116] The granules are coated to add sensitive ingredients;

[0117] Quality control testing is carried out on the product, and it is packaged and stored.

[0118] Further, per kg of large yellow croaker premix includes the following ingredients and their weight percentage ranges, solid raw materials are: vitamin A acetate: 200000-300000IU; vitamin D3: 100000-150000IU; dl-α-tocopherol acetate: 5000-7000mg; nicotinamide bisulfite: 330-400mg; thiamine nitrate: 500-600mg; riboflavin: 860-1000mg; pyridoxine hydrochloride: 650-800mg; cyanocobalamin: 5-10mg; inositol: 5500-7000mg; L-ascorbic acid-2-phosphoric acid: 18000-20000mg; nicotinic acid amine: 5000-6000mg; D-calcium pantothenate: 2100-2500mg; folic acid: 85-100mg; D-biotin: 5-10mg; copper: 290-350mg; iron: 2500-3000mg; manganese: 730-800mg; zinc: 5300-6000mg; iodine: 130-150mg; selenium: 23-30mg; cobalt: 80-100mg; ethoxyquin: 0-3000mg; dibutyl hydroxytoluene: 0-1000mg;

[0119] Liquid raw materials are: fish oil: 10000-20000mg; linseed oil: 5000-10000mg; liquid lysine: 2000-4000mg; liquid methionine: 1000-2000mg; citric acid solution: 500-1000mg; lecithin: 500-1000mg; sugar syrup: 3000-5000mg.

[0120] Further, the mixing time of the preliminary mixing is 15-20 minutes; the secondary mixing is carried out after the preliminary mixing is completed, and the mixing time is 5-10 minutes; the sensitive ingredients added in the coating are vitamins.

[0121] The following are some test results of the application formula compared with the control group and the market mainstream product:

[0122]

[0123] Test parameters:

[0124] Growth Rate (%): Measures the average weight gain of large yellow croaker over a certain period of time.

[0125] Immunity Index: Measures the level of immune-related proteins (immunoglobulin IgM) in large yellow croaker through blood sample analysis.

[0126] Meat Quality Score: Comprehensive evaluation through sensory assessment (color, texture, taste) and chemical analysis (moisture, protein, fat content).

[0127] Digestibility (%): Estimates the digestibility by analyzing the amount of undigested food in fish excrement.

[0128] Survival Rate (%): Records the percentage of fish that survive during the test period.

[0129] All tests are conducted under the same environmental conditions (water temperature, pH, dissolved oxygen, etc.).

[0130] All fish come from the same farming batch to reduce the impact of genetic differences.

[0131] Each test group has a sufficient number of samples to ensure the reliability of statistical results.

[0132] Existing products A and B represent two different formulations of premix widely used in the market.

[0133] Growth rate, digestibility, and survival rate are obtained through statistical data from control tests.

[0134] Immunity index and meat quality score are obtained through professional laboratory analysis and sensory evaluation.

[0135] All tests are conducted under the same conditions to ensure the fairness and comparability of the results.

[0136] Based on the test results of the above assumptions, the following analysis and conclusions are drawn:

[0137] Conclusion:

[0138] The large yellow croaker premix of the invention significantly improves the growth rate, immunity, meat quality, digestibility, and survival rate of large yellow croaker through a carefully designed formula and advanced mixing process, outperforming existing market products and other test formulations.

[0139] The design of the mixing device and the mixing process are crucial to ensure uniform distribution and activity of ingredients, which in turn affect the effectiveness of the final product.

[0140] Further, see Figures 2 to 5, preliminary mixing and secondary mixing are carried out by using a composite mixing device, the composite mixing device comprises a flat stirring barrel 1 and a stirring mechanism 2 arranged in the stirring barrel 1; the bottom of the stirring barrel 1 is an elastically stretchable structure 101; the stirring mechanism 2 comprises a vertical main shaft 201 and a plurality of upper stirring rods 202, middle stirring rods 203 and lower stirring rods 204 uniformly arranged around the main shaft 201; the main shaft 201 is driven to rotate by a motor; the upper stirring rods 202, the middle stirring rods 203 and the lower stirring rods 204 are respectively provided with stirring blades 207; an upper fixed block 205 is fixedly sleeved on the upper part of the main shaft 201, and a lower sliding block 206 is slidably sleeved on the lower part of the main shaft 201; one end of each of the upper stirring rods 202 is hingedly connected to the upper fixed block 205, and the other end is hingedly connected to one end of each of the middle stirring rods 203; one end of each of the lower stirring rods 204 is rotatably connected to the lower sliding block 206, and the other end is connected to the other end of each of the middle stirring rods 203 through a universal joint 215; under normal circumstances, the upper stirring rods 202, the middle stirring rods 203, the lower stirring rods 204 and the main shaft 201 enclose a rectangular frame; a sleeve 208 with an inner diameter larger than the diameter of the main shaft 201 is fixedly connected to the upper end of the lower sliding block 206 and the lower end of the sleeve 208 passes downward from the middle of the elastically stretchable structure 101; the sleeve 208 and the elastically stretchable structure 101 are fixedly connected through a rigid connecting ring 209; a hydraulic telescopic rod drives the sleeve 208 to move downward, which drives the middle of the elastically stretchable structure 101 to be stretched downward into a conical shape, and at the same time, the lower sliding block 206 drives the lower stirring rods 204, the middle stirring rods 203 and the upper stirring rods 202 to be turned downward in turn to fit the shape of the deformed stirring barrel 1.

[0141] Further, a removable impact mechanism 3 is arranged below the elastically stretchable structure 101; the impact mechanism 3 comprises a plurality of impact heads 301 which can be independently stretched upward and downward to impact the elastically stretchable structure 101 upward during stirring.

[0142] Further, the lower sliding block 206 is a hollow structure, and a slit is formed in the vertical position corresponding to the lower stirring rod 204 to allow the lower stirring rod 204 to rotate up and down; one end of the lower stirring rod 204 extends into the lower sliding block 206 through the slit, and the end extending into the lower sliding block 206 is fixed with a linkage head 217; the linkage head 217 is a tapered shape with an outer convex arc surface, and an outer convex thread is arranged along the outer convex arc surface; the lower end of the lower sliding block 206 is open, and a lower convex upper limiting structure 210 and an upper convex lower limiting structure 211 are arranged corresponding to the linkage head 217 to limit the movement of the linkage head 217; the outer surface of the lower sliding block 206 is further covered with an elastic sealing layer 212 to shield the slit; the lower part of the main shaft 201 is further rotatably sleeved with a driving disc 213; the driving disc 213 is driven to rotate by a downward extending driving pipe 216 rotatably sleeved outside the main shaft 201; the diameters of the driving disc 213 and the driving pipe 216 are smaller than the inner diameter of the sleeve 208 so that they do not interfere with the movement of the sleeve 208; the driving disc 213 is provided with an annular inner concave arc surface 214 corresponding to the outer convex arc surface of the linkage head 217; the annular inner concave arc surface 214 is provided with an outer convex thread that can engage with the outer convex thread on the linkage head 217 to allow the linkage head 217 to rotate during the rotation of the driving disc 213; the hydraulic telescopic rod drives the sleeve 208 to move downward until the linkage head 217 fits with the annular inner concave arc surface 214 of the driving disc 213.

[0143] Further, the stirring blades 207 can be selected as needed:

[0144] Paddle: Due to its simple design, paddle stirring blades are suitable for stirring low to medium viscosity materials, such as dry powder and granular feed. They provide gentle and uniform stirring, suitable for large batch mixing.

[0145] Propeller: Propeller stirring blades are suitable for rapid mixing and suspending low viscosity fluids and particles, especially in cases where rapid mixing is required. They can create high-speed axial flow, suitable for mixing of liquids and dry materials.

[0146] Turbine: Turbine stirring blades can produce strong radial flow, suitable for stirring medium viscosity materials. For feed mixing containing multiple ingredients, turbine stirrers can ensure good dispersion and uniform mixing.

[0147] Anchor: The design of anchor stirring blades makes them suitable for stirring high viscosity materials and larger containers. They move at the edge of the stirrer, ensuring that the materials in the container are fully stirred. This type of stirrer is suitable for mixing of viscous or powdery feed.

[0148] Screw: Screw stirring blades operate in vertical or horizontal stirring containers, and are very suitable for stirring dry or wet powders and granular materials. They can provide gentle and efficient stirring to ensure uniform mixing of feed ingredients.

[0149] When selecting a mixer suitable for mixing feed, the specific ingredients of the feed, the required mixing uniformity, the processing capacity, and the energy efficiency and maintenance cost of the mixing blades need to be considered. In addition, it is also very important to ensure that the mixing blade material is compatible with the feed ingredients and avoid contamination.

[0150] Further, the composite mixing method of the composite mixing device comprises the following steps:

[0151] ①Pour the material to be mixed into the mixing barrel 1 from the upper part, start the motor to drive the main shaft 201 to rotate, and the main shaft 201 drives the mixing mechanism 2 as a whole to rotate in the horizontal direction through the upper fixed block 205, the upper stirring rod 202, the middle stirring rod 203 and the lower stirring rod 204 in turn, to stir and mix the material; in this process, the controller controls each impact head 301 to stretch and contract upward and downward respectively to impact the elastic stretchable structure 101, so that the material at the bottom is bounced up, and the entire elastic stretchable structure 101 is supported and does not fall as a whole;

[0152] ②After a certain period of stirring, the controller controls the hydraulic telescopic rod to drive the sleeve 208 to move downward, which drives the middle part of the elastic stretchable structure 101 to be tensioned downward into a conical shape, until the linkage head 217 fits with the annular inner concave arc surface 214 of the driving disc 213, and at the same time, the lower stirring rod 204, the middle stirring rod 203 and the upper stirring rod 202 are sequentially driven by the lower sliding block 206 to flip downward to fit the deformed shape of the mixing barrel 1; at this time, the main shaft 201 still drives the mixing mechanism 2 as a whole to rotate horizontally; at the same time, due to the interference engagement of the external threads on the linkage head 217 and the driving disc 213, the driving pipe 216 drives the driving disc 213 to rotate, and then drives the linkage head 217 to rotate, so that the lower stirring rod 204 rotates around the main shaft 201 while rotating around the main shaft 201 as a whole.

[0153] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A compound mixing device for premixed materials, characterized in that: The apparatus includes a flat mixing tank (1) and a stirring mechanism (2) disposed within the mixing tank (1); the bottom of the mixing tank (1) is an elastically stretchable structure (101); the stirring mechanism (2) includes a vertically arranged main shaft (201) and multiple upper stirring rods (202), middle stirring rods (203), and lower stirring rods (204) evenly arranged around the main shaft (201); the main shaft (201) is driven to rotate by a motor; the upper stirring rods (202) The middle stirring rod (203) and the lower stirring rod (204) are respectively provided with stirring blades (207); the upper part of the main shaft (201) is fixedly sleeved with an upper fixing block (205), and the lower part is slidably sleeved with a lower sliding block (206); one end of the upper stirring rod (202) is respectively hinged to the upper fixing block (205), and the other end is respectively hinged to one end of the middle stirring rod (203); one end of the lower stirring rod (204) is rotatably connected to the lower sliding block (206). On the upper part of the upper stirring rod (206), the other end is connected to the other end of the middle stirring rod (203) via a universal joint (215); under normal conditions, the upper stirring rod (202), the middle stirring rod (203), the lower stirring rod (204) and the main shaft (201) enclose a rectangular frame; a sleeve (208) set outside the main shaft (201) and with an inner diameter larger than the diameter of the main shaft (201) is fixedly connected at its upper end to the lower sliding block (206), and its lower end extends from the middle of the elastic stretchable structure (101) towards the lower sliding block (206). The sleeve (208) is fixedly connected to the elastic stretchable structure (101) by a rigid connecting ring (209); a hydraulic telescopic rod drives the sleeve (208) to move downward, causing the middle part of the elastic stretchable structure (101) to be stretched downward into a cone shape, and at the same time, the lower sliding block (206) sequentially drives the lower stirring rod (204), the middle stirring rod (203) and the upper stirring rod (202) to flip downward to fit the shape of the stirring barrel (1) after deformation.

2. The premixing apparatus according to claim 1, characterized in that, Below the elastic stretchable structure (101) is a removable impact mechanism (3); the impact mechanism (3) includes multiple impact heads (301) that can extend and retract vertically to impact the elastic stretchable structure (101) upward during the stirring process; each impact head (301) can independently extend and retract vertically.

3. The premixing apparatus according to claim 2, characterized in that, The lower sliding block (206) is a hollow structure, and a slit is vertically opened at the position corresponding to the lower stirring rod (204) to allow the lower stirring rod (204) to rotate up and down; one end of the lower stirring rod (204) passes through the slit and extends into the lower sliding block (206), and a linkage head (217) is fixed at the end of the lower sliding block (206); the linkage head (217) is a cone with an outwardly convex arc surface, and an outwardly convex thread is inclined along its outwardly convex arc surface; the lower end of the lower sliding block (206) is open, and a lower convex upper limit structure (210) and an upper convex lower limit structure (211) are provided corresponding to the linkage head (217) to restrict the movement of the linkage head (217); the outer surface of the lower sliding block (206) is also covered with an elastic sealing layer (212) to cover the slit; the lower part of the main shaft (201) also rotates A drive disc (213) is mounted on the sleeve. The drive disc (213) is driven to rotate by a downwardly extending drive tube (216) that is rotatably mounted outside the main shaft (201). The diameters of the drive disc (213) and the drive tube (216) are smaller than the inner diameter of the sleeve (208) so that they do not interfere with the movement of the sleeve (208). An annular concave arc surface (214) is provided on the convex arc surface of the drive disc (213) corresponding to the linkage head (217). An externally protruding thread that can mesh with and interfere with the externally protruding thread on the linkage head (217) is provided on the annular concave arc surface (214) so ​​that the linkage head (217) rotates during the rotation of the drive disc (213). The hydraulic telescopic rod drives the sleeve (208) to move downward until the linkage head (217) and the annular concave arc surface (214) of the drive disc (213) are engaged.

4. The premixing apparatus according to claim 3, characterized in that, The composite mixing method of the composite mixing device includes the following steps: ① Pour the material to be mixed into the mixing tank (1) from the top, start the motor to drive the main shaft (201) to rotate. The main shaft (201) drives the mixing mechanism (2) to rotate horizontally through the upper fixed block (205), upper stirring rod (202), middle stirring rod (203) and lower stirring rod (204) in sequence to mix the material. During this process, the controller controls each impact head (301) to extend and retract to impact the elastic stretchable structure (101) to make the material at the bottom bounce up, while supporting the entire elastic stretchable structure (101) to prevent it from falling. ② After stirring for a certain period of time, the controller controls the hydraulic telescopic rod to drive the sleeve (208) to move downward, causing the middle part of the elastic stretchable structure (101) to be stretched downward into a cone shape until the linkage head (217) and the annular concave arc surface (214) of the drive disk (213) are engaged. At the same time, the lower sliding block (206) sequentially drives the lower stirring rod (204), the middle stirring rod (203) and the upper stirring rod (202) to flip downward to fit the deformed shape of the mixing tank (1). At this time, the main shaft (201) still drives the stirring mechanism (2) to rotate horizontally as a whole. At the same time, due to the interference meshing of the external threads on the linkage head (217) and the drive disk (213), the drive tube (216) drives the drive disk (213) to rotate, which in turn drives the linkage head (217) to rotate, so that the lower stirring rod (204) rotates while following the stirring mechanism (2) to revolve around the main shaft (201).

5. A production process for a premixed feed for large yellow croaker, characterized in that, The formulation of the large yellow croaker premix includes solid raw materials and liquid raw materials; the production process includes the following steps: Raw material pretreatment involves crushing solid raw materials to a particle size of 0.1-0.4 mm; Preliminary mixing involves mixing the pulverized solid raw materials to form a homogeneous mixture; Secondary mixing involves adding liquid raw materials to the mixture and mixing them to ensure uniform distribution. Granulation is performed using a granulator, and the resulting granules are then cooled and dried. The particles are coated to add sensitive ingredients; Conduct quality control testing on the products, and package and store them. The preliminary mixing and secondary mixing employ the composite mixing apparatus as described in any one of claims 1 to 3.

6. The production process of the large yellow croaker premix according to claim 5, characterized in that, Each kilogram of large yellow croaker premix includes the following components and their weight percentage ranges. Solid ingredients include: Vitamin A acetate: 200,000-300,000 IU; Vitamin D3: 100,000-150,000 IU; dl-α-tocopherol acetate: 5,000-7,000 mg; Nicotinamide bisulfite: 330-400 mg; Thiamine nitrate: 500-600 mg. Riboflavin: 860-1000mg; Pyridoxine hydrochloride: 650-800mg; Cyanocobalamin: 5-10mg; Inositol: 5500-7000mg; L-ascorbic acid-2-phosphate: 18000-20000mg; Nicotinamide: 5000-6000mg; D-calcium pantothenate: 2100-2500mg; Folic acid: 85-100mg; D-Biotin: 5-10mg; Copper: 290-350mg; Iron: 2500-3000mg; Manganese: 730-800mg; Zinc: 5300-6000mg; Iodine: 130-150mg; Selenium: 23-30mg; Cobalt: 80-100mg; Ethoxyquinoline: 0-3000mg; Butylated hydroxytoluene: 0-1000mg; Liquid ingredients include: fish oil: 10,000-20,000 mg; flaxseed oil: 5,000-10,000 mg; liquid lysine: 2,000-4,000 mg; liquid methionine: 1,000-2,000 mg; citric acid solution: 500-1,000 mg; lecithin: 500-1,000 mg; and syrup: 3,000-5,000 mg.

7. The production process of the large yellow croaker premix according to claim 5, characterized in that, The initial mixing time is 15-20 minutes; the secondary mixing is carried out after the initial mixing is completed, and the mixing time is 5-10 minutes; the sensitive ingredient added to the coating is vitamin.

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