Compound nutrient mixing system applying step-by-step amplification mixing method

Abstract

The invention relates to a compound nutrient mixing system applying a step-by-step amplification mixing method. The compound nutrient mixing system comprises more than two three-dimensional production lines, wherein each three-dimensional production line comprises a mixing machine, so that the compound nutrients are prepared through the mixing machine by adopting a step-by-step amplification mixing method; the method comprises the following steps: firstly, carrying out first-stage mixing on various nutrients with the mass of a first unit order in an ingredient table of to-be-prepared composite nutrients by a mixing machine to obtain a first-stage mixture; the mixing machine is also suitable for performing second-stage mixing on the nutrients with the mass of the second unit order in the ingredient list of the compound nutrients to be prepared and the first-stage mixture to obtain a second-stage mixture; the mixing machine is suitable for performing third-stage mixing on the nutrients with the mass of the third unit order in the ingredient list of the compound nutrients to be prepared and the second-stage mixture to obtain the compound nutrients; wherein the three-dimensional production lines are respectively used for preparing the compound nutrients with different qualities.

Description

Technical Field

[0001] This application relates to the field of compound nutrient preparation, and more particularly to a compound nutrient mixing system that uses a step-by-step scale-up mixing method. Background Technology

[0002] There are many types of special dietary foods. Currently in my country, the main types include infant formula (including infant formula, follow-up formula, and infant formula for special medical purposes), infant complementary foods (including cereal-based and canned infant complementary foods), and other special dietary foods. These special dietary foods must be added to the food by selecting various micronutrients from over one hundred compounds according to relevant standards. To ensure safe, scientific, and efficient production by food companies, food additive companies mix various nutrient compounds and deliver them to the food companies for production.

[0003] The production of compound nutrients (i.e. nutrient premixes) in my country has only a few decades of history. From the initial simple mixing to the gradual improvement of domestic production conditions, and from initially imitating the production methods of international companies to the improvement of my country's compound nutrient standards, it has gone through the development stages of production equipment from small to large and production technology from low to high.

[0004] The production technology of compound nutrients is complex and requires strict production conditions. Since compound nutrients contain dozens of nutrients, the uniformity of the mixed product is paramount. The stable uniformity of the final premix is ​​fundamental to ensuring the uniformity of nutrient content in special dietary foods and is a key factor in guaranteeing the quality of premix production. Currently, most companies typically use only one production line to produce compound nutrients in varying quantities. The larger the required mass of compound nutrients, the higher the content of each nutrient, making uniform mixing more difficult. Using only a single production line to mix different masses of compound nutrients makes it difficult to accurately control the product's mixing uniformity, easily leading to uneven distribution of components in certain areas, thus affecting the consistency of product quality.

[0005] This application proposes a compound nutrient mixing system that uses a step-by-step scale-up mixing method, suitable for differentiating and mixing compound nutrients of different preparation qualities. Summary of the Invention

[0006] In view of this, this application proposes a compound nutrient mixing system that uses a step-by-step scale-up mixing method, including two or more three-dimensional production lines. Each of the three-dimensional production lines includes a mixer, which is used to prepare compound nutrients by a step-by-step scaling-up mixing method. When preparing compound nutrients using a step-by-step scaling-up mixing method with a mixer, the mixer first mixes each nutrient in the ingredient list of the compound nutrient to be prepared at the first unit mass level to obtain a first-stage mixture. Furthermore, the mixer is also suitable for mixing each nutrient in the ingredient list of the compound nutrient to be prepared (at the second unit level) with the primary mixture to obtain a secondary mixture. The mixer is also suitable for mixing each nutrient in the ingredient list of the compound nutrient to be prepared (at the third unit level) with the secondary mixture in a third-stage mixing process to obtain the compound nutrient. The first unit order of magnitude, the second unit order of magnitude, and the third unit order of magnitude are of different magnitudes and increase progressively. Among them, two or more of the three-dimensional production lines are used to formulate the compound nutrients of different qualities.

[0007] In one possible implementation, there are three three-dimensional production lines, namely: a first three-dimensional production line, a second three-dimensional production line and a third three-dimensional production line; The first three-dimensional production line includes: a first mixer; suitable for situations where the mass of the prepared compound nutrients is less than 50 kg, the mixing process of the compound nutrients is completed in the first mixer; The second three-dimensional production line includes a second mixer and a third mixer, and the discharge port of the second mixer is connected to the inlet of the third mixer through a conveying pipe; it is suitable for when the mass of the compound nutrients after preparation is between 50kg and 300kg, the mixing process of the compound nutrients is completed in the second mixer and the third mixer. The third three-dimensional production line includes a fourth mixer, a fifth mixer, and a sixth mixer; the outlet of the fourth mixer is connected to the inlet of the fifth mixer via a conveying pipe, and the outlet of the fifth mixer is connected to the inlet of the sixth mixer via a conveying pipe; it is suitable when the mass of the compound nutrients after preparation is between 300kg and 500kg, and the mixing process of the compound nutrients is completed in the fourth mixer, the fifth mixer, and the sixth mixer.

[0008] This application also proposes a step-by-step scale-up mixing method, including: The first-level mixture is obtained by first-stage mixing of each nutrient in the ingredient list of the compound nutrient to be prepared, which is in the first unit mass order. The second-level mixture is obtained by mixing each nutrient in the ingredient list of the compound nutrient to be prepared with the first-level mixture. The compound nutrient is obtained by mixing the nutrients in the ingredient list of the compound nutrient to be prepared (at the third unit level) with the secondary mixture in the third stage. The first, second, and third unit orders have different orders of magnitude, and they increase progressively.

[0009] Beneficial Effects: This application employs a scale-up method for producing compound nutrients. First, smaller quantities of nutrients are mixed, then medium quantities are mixed, and finally, larger quantities are mixed. Specifically, the nutrients in the ingredient list are categorized into three levels: first unit, second unit, and third unit, and mixed in a scale-up manner, effectively improving the mixing efficiency and speed. Simultaneously, this application sets up multiple integrated production lines suitable for premixing nutrients at various production weight ranges, precisely matching the production needs of different batches and avoiding resource waste or low production efficiency due to mismatches between the integrated production line and order size. This application integrates and optimizes the mixing system and the scale-up mixing method. Based on multiple production lines, and targeting different product weight levels, the scale-up mixing method for compound nutrients is applied to multiple production lines, helping to refine quality control. Each integrated production line optimizes the mixing steps for a specific weight range, ensuring the uniformity and stability of the premixed composition, thereby guaranteeing the consistency of the final product quality.

[0010] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0011] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0012] Figure 1 This diagram shows the main structure of the compound nutrient mixing system according to an embodiment of this application. Figure 2 The diagram illustrates the steps of a step-by-step scaling-up mixing method according to an embodiment of this application. Detailed Implementation

[0013] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0014] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application or to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0016] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0017] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0018] A compound nutrient mixing system employing a scale-up mixing method includes two or more three-dimensional production lines. Each three-dimensional production line includes a mixer for preparing compound nutrients using a scale-up mixing method. When preparing compound nutrients using the scale-up mixing method, the mixer first performs a first-stage mixing of the nutrients in the ingredient list of the compound nutrient to be prepared at a first-unit mass level to obtain a first-stage mixture. The mixer is also suitable for performing a second-stage mixing of the nutrients in the ingredient list of the compound nutrient to be prepared at a second-unit mass level with the first-stage mixture to obtain a second-stage mixture. The mixer is also suitable for performing a third-stage mixing of the nutrients in the ingredient list of the compound nutrient to be prepared at a third-stage mixture with the second-stage mixture to obtain the compound nutrient. The first, second, and third unit mass levels are of different magnitudes and increase progressively. The two or more three-dimensional production lines are used to prepare compound nutrients of different masses.

[0019] This application employs a scale-up method for producing compound nutrients. It involves first mixing smaller quantities of nutrients, then mixing medium quantities of nutrients, and finally mixing larger quantities of nutrients. Specifically, the nutrients are categorized into three levels—first-unit, second-unit, and third-unit—based on the unit weight in the ingredient list, and then mixed in a scale-up manner to effectively improve the uniformity and speed of mixing. Furthermore, this application utilizes multiple automated production lines to premix nutrients for various production weight ranges, precisely matching the production needs of different batches and avoiding resource waste or low production efficiency caused by mismatches between the automated production lines and order sizes.

[0020] It should also be noted that this production system is based on the premise that all materials have a particle size of 40 mesh or higher, some nutrients need to be diluted before use, and the flowability of various materials must be similar. Pre-treatment of various nutrients is a crucial prerequisite for ensuring uniform mixing of the compound nutrients.

[0021] Furthermore, this application comprises three three-dimensional production lines: a first three-dimensional production line, a second three-dimensional production line, and a third three-dimensional production line. The first three-dimensional production line includes a first mixer 100, suitable for applications where the mass of the prepared compound nutrient is less than 50 kg, with the mixing process of the compound nutrient completed within the first mixer 100. The second three-dimensional production line includes a second mixer 200 and a third mixer 300, with the outlet of the second mixer 200 connected to the inlet of the third mixer 300 via a conveying pipe; suitable for applications where the mass of the prepared compound nutrient is between 50 kg and 300 kg (inclusive of 50 kg, excluding 300 kg). The mixing process of the compound nutrients is completed in the second mixer 200 and the third mixer 300; the third three-dimensional production line includes: the fourth mixer 400, the fifth mixer 500 and the sixth mixer 600; and the discharge port of the fourth mixer 400 is connected to the inlet of the fifth mixer 500 through a conveying pipe, and the discharge port of the fifth mixer 500 is connected to the inlet of the sixth mixer 600 through a conveying pipe; applicable when the mass of the compound nutrients after preparation is between 300kg and 500kg (inclusive), the mixing process of the compound nutrients is completed in the fourth mixer 400, the fifth mixer 500 and the sixth mixer 600.

[0022] It should be noted that this application sets up three automated production lines to respectively complete the premixing of nutrients for three different production weight ranges. When producing compound nutrients with a total weight of less than 50 kg, premixing is performed using the first automated production line; when producing compound nutrients with a total weight of 50 kg to 300 kg, premixing is performed using the second automated production line; and when producing compound nutrients with a total weight of 300 kg to 500 kg, premixing is performed using the third automated production line. For small-batch orders, the first automated production line enables rapid start-up and precise ingredient dispensing, reducing unnecessary energy consumption and material loss. For medium-batch orders, the second automated production line balances production speed and mixing uniformity. For large-batch orders, the scale capability of the third automated production line increases output per unit time and reduces overall production costs. Simultaneously, separate production lines help refine quality control processes. Each automated production line optimizes the mixing steps for a specific weight range, ensuring the uniformity and stability of the premixed material's composition, thereby guaranteeing the consistency of the final product's quality. In addition, this differentiated configuration also enhances the flexibility of production arrangements, enabling rapid response to diverse market orders and improving the company's production scheduling efficiency and market adaptability.

[0023] In one possible implementation, the first mixer 100 is a dual-motion mixer. While the material container rotates to mix the materials, full-size blades inside the container rotate independently at a higher speed, superimposing and mixing the materials in different directions and at different speeds.

[0024] In one possible implementation, both the second mixer 200 and the fourth mixer 400 are three-dimensional mixers, and both the second mixer 200 and the fourth mixer 400 can also be dual-motion mixers; the choice can be made according to the actual situation.

[0025] In one possible implementation, both the third mixer 300 and the fifth mixer 500 are wet granulation mixers. The characteristics of a high-speed wet granulation mixer include: rapid mixing speed. When mixing the same weight of material, a high-speed wet granulation mixer takes several times longer than other mixers. High-speed wet granulation mixers can use airflow for unloading, making the unloading process safe and convenient.

[0026] In one possible implementation, the sixth mixer 600 employs a ribbon mixer. The ribbon mixer is a high-efficiency, high-loading-coefficient, low-energy-consumption, and low-pollution mixing device. Using a ribbon mixer when mixing 500 kg of product can improve mixing efficiency and reduce batching time.

[0027] In summary, the first three-dimensional production line consists of a dual-motion mixer; the second consists of a three-dimensional mixer and a wet granulation mixer connected in sequence; and the third consists of a three-dimensional mixer, a wet granulation mixer, and a ribbon mixer connected in sequence. This application establishes three independent production lines, each dedicated to producing a specific quality grade of product, thereby achieving separate management of products of different quality levels. This configuration allows each production line to be optimized and adjusted for the preparation of its corresponding quality grade of compound nutrients, avoiding interference during production and significantly improving the uniformity of the compound nutrients. Furthermore, this multi-production line layout helps improve production flexibility, reduce equipment changeover time, lower quality risks, and enhance overall production efficiency and product competitiveness.

[0028] Preferably, the second mixer 200 and the third mixer 300 of the second three-dimensional production line are arranged perpendicularly to each other, with the second mixer 200 located above the third mixer 300, so that the conveying pipe between the second mixer 200 and the third mixer 300 is vertical, and the nutrients fall into the third mixer 300 by their own gravity, thereby improving the efficiency of nutrient transfer between the second mixer 200 and the third mixer 300.

[0029] Preferably, the fourth mixer 400, the fifth mixer 500, and the sixth mixer 600 of the third three-dimensional production line are arranged vertically from top to bottom, with the fourth mixer 400 located above the fifth mixer 500 and the fifth mixer 500 located above the sixth mixer 600. This makes the two conveying pipes vertical, and the nutrients fall into the next mixer by their own gravity, thereby improving the efficiency of nutrient transfer between the fourth mixer 400, the fifth mixer 500, and the sixth mixer 600.

[0030] Currently, most nutrient premix production in my country adopts a parallel production line method. In GMP-standard production workshops, materials are unloaded and transported using trolleys from the start of premixing to the end of final mixing, resulting in time-consuming and labor-intensive production and inconsistent mixing quality. This application not only effectively improves the mixing speed but also significantly reduces labor input.

[0031] First, it should be noted that the step-by-step scale-up mixing method in this application is mainly an optimization and improvement of the mixing process for the following compound nutrient formula (ingredient list).

[0032] A formula for producing 3000g of a vitamin premix is ​​as follows: 53g of VA powder (10%), 36g of VD powder (0.5%), 240g of VE powder (50%), 20g of VK1 powder (5%), 10g of VB1 (thiamine nitrate), 6g of VB2 (vitamin B2), 6g of VB6 (vitamin B6), 2g of folic acid, 0.2g of biotin, 0.03g of VB12 (vitamin B12), 40g of calcium pantothenate, 50g of nicotinamide, 15g of lutein (5%), 450g of taurine, 1500g of VC (vitamin C), and 571.77g of maltodextrin. If preparing other quantities of this vitamin premix, the dosage of each nutrient should be determined proportionally based on the proportions of each nutrient in the ingredient list.

[0033] like Figure 2 As shown, the step-by-step scale-up mixing method for a compound nutrient includes: firstly mixing each nutrient in the ingredient list of the compound nutrient to be prepared at a first-unit mass level to obtain a first-unit mixture; secondly mixing each nutrient in the ingredient list of the compound nutrient to be prepared at a second-unit mass level with the first-unit mixture to obtain a second-unit mixture; and thirdly mixing each nutrient in the ingredient list of the compound nutrient to be prepared at a third-unit mass level with the second-unit mixture to obtain the compound nutrient; the first, second, and third unit mass levels are of different magnitudes and increase progressively.

[0034] Furthermore, in one possible implementation, nutrients with a mass less than 1000mg in the ingredient list are defined as first-unit-weight nutrients; nutrients with a mass between 1 and 1000g (inclusive) in the ingredient list are defined as second-unit-weight nutrients; and nutrients with a mass greater than 1kg in the ingredient list are defined as third-unit-weight nutrients. That is, firstly, the nutrients with a mass less than 1000mg in the ingredient list of the compound nutrient to be formulated are mixed in a first-stage mixture to obtain a first-stage mixture; then, the nutrients with a mass between 1 and 1000g in the ingredient list of the compound nutrient to be formulated are mixed in a second-stage mixture with the first-stage mixture to obtain a second-stage mixture; finally, the nutrients with a mass greater than 1kg in the ingredient list of the compound nutrient to be formulated are mixed in a third-stage mixture with the second-stage mixture to obtain the compound nutrient.

[0035] It should be noted that this application employs a scale-up method to produce compound nutrients. This involves first mixing nutrients of smaller mass, then mixing nutrients of moderate mass, and finally mixing nutrients of larger mass. Specifically, the nutrients are categorized into three levels—first unit level, second unit level, and third unit level—based on the unit weight of each nutrient in the ingredient list, and then mixed in a scale-up manner. Specifically, nutrients with a mass less than 1000mg in the ingredient list of the compound nutrient to be formulated are designated as the first unit level. These first unit level nutrients are pre-mixed to obtain a first-level mixture, ensuring uniform mixing among the nutrients in this stage. Nutrients with a mass of 1–1000g (inclusive) in the ingredient list of the compound nutrient to be formulated are designated as the second unit level. These second unit level nutrients are added to the first-level mixture and mixed together to obtain a second-level mixture, ensuring uniform mixing between the first and second unit level nutrients. The method ensures uniform mixing among the first, second, and third unit levels of nutrients. Nutrients with a mass greater than 1 kg in the ingredient list of the compound nutrient formulation are designated as the third unit level. These third unit level nutrients are added to the second-level mixture and mixed together to obtain the compound nutrient. This ensures uniform mixing among the first, second, and third unit level nutrients. The resulting compound nutrient has a more uniform component distribution, effectively avoiding the problem of excessively high or low local concentrations caused by insufficient mixing of small doses of micronutrients, significantly improving the overall stability and nutritional balance of the premix. Furthermore, this method employs a step-by-step mixing logic, first performing preliminary mixing and dispersion of micro-components, then adding the main materials for further mixing and dispersion, enhancing the compatibility and consistency of the materials. In large-scale production, this method maintains stable mixing quality, reduces material loss during production, improves production efficiency and product qualification rate, and better meets the stringent requirements of continuous industrial production for consistent premix quality.

[0036] In summary, based on the formula for producing 3000g of a vitamin premix mentioned above: VA powder (10%) 53g, VD powder (0.5%) 36g, VE powder (50%) 240g, VK1 powder (5%) 20g, VB1 (thiamine nitrate) 10g, VB2 6g, VB6 6g, folic acid 2g, biotin 0.2g, VB12 0.03g, calcium pantothenate 40g, nicotinamide 50g, lutein (5%) 15g, taurine 450g, VC 1500g, and maltodextrin 571.77g. The nutrients were classified by unit weight as follows: the first unit weight group consisted of biotin and VB12; the second unit weight group consisted of VA powder, VD powder, VE powder, VK1 powder, VB1 (thiamine nitrate), VB2, VB6, folic acid, calcium pantothenate, nicotinamide, lutein (5%), taurine and maltodextrin; and the third unit weight group consisted of VC.

[0037] Furthermore, when the total mass of the prepared compound nutrients is less than 50 kg, the first, second, and third mixing processes are all completed in the same mixer (the first mixer 100 of the first three-dimensional production line); when the total mass of the prepared compound nutrients is between 50 kg and 300 kg, the first, second, and third mixing processes are completed sequentially in two mixers (the second mixer 200 and the third mixer 300 of the second three-dimensional production line); when the mass of the prepared compound nutrients is between 300 kg and 500 kg, the first, second, and third mixing processes are completed sequentially in three mixers (the fourth mixer 400, the fifth mixer 500, and the sixth mixer 600 of the third three-dimensional production line).

[0038] The mixing system and the step-by-step scale-up mixing method proposed in this application have been integrated and optimized. Based on three production lines, the step-by-step scale-up mixing method of compound nutrients is applied to these three production lines to further improve the uniformity of product mixing, targeting different quality requirements of the product.

[0039] In one possible implementation, when the mass of the prepared compound nutrient is less than 50 kg, the following steps are taken: First, the nutrients in the ingredient list of the compound nutrient to be prepared, in the first unit quantity (less than 1000 mg), are placed into the first mixer 100 for first-stage mixing to obtain a first-stage mixture. Then, the nutrients in the ingredient list of the compound nutrient to be prepared, in the second unit quantity (1–1000 g), are placed into the first mixer 100 and mixed with the first-stage mixture to obtain a second-stage mixture. Finally, the nutrients in the ingredient list of the compound nutrient to be prepared, in the third unit quantity (greater than 1 kg), are placed into the first mixer 100 and mixed with the second-stage mixture to obtain the compound nutrient. It should be noted that since the mass of the prepared compound nutrient is less than 50 kg, one first mixer 100 is sufficient to complete the mixing of the nutrients at each level.

[0040] In summary, when the total mass of the prepared vitamin premix (its ingredient list is the formula for producing 3000g of vitamin premix mentioned above) is less than 50kg; firstly, biotin and VB12 are placed in the first mixer 100 for first-stage mixing to obtain the first-stage mixture; then, VA powder, VD powder, VE powder, VK1 powder, VB1 (thiamine nitrate), VB2, VB6, folic acid, calcium pantothenate, nicotinamide, lutein (5%), taurine, and maltodextrin are placed in the first mixer 100 and mixed with the first-stage mixture for second-stage mixing to obtain the second-stage mixture; finally, VC is placed in the first mixer 100 and mixed with the second-stage mixture for third-stage mixing to obtain the complex nutrients.

[0041] In one possible implementation, when the mass of the prepared compound nutrient is between 50 kg and 300 kg, the following steps are taken: First, the nutrients in the ingredient list of the compound nutrient to be prepared, in the first unit quantity (less than 1000 mg), are placed into a second mixer 200 for first-stage mixing to obtain a first-stage mixture. Then, the first-stage mixture is placed into a third mixer 300, and the nutrients in the ingredient list of the compound nutrient to be prepared, in the second unit quantity (1-1000 g), are placed into the third mixer 300 and mixed with the first-stage mixture to obtain a second-stage mixture. Finally, the nutrients in the ingredient list of the compound nutrient to be prepared, in the third mixer 300, are placed into the third mixer 300 and mixed with the second-stage mixture to obtain the compound nutrient. It should be noted that since the mass of the compound nutrients after preparation is between 50kg and 300kg, it is difficult to ensure the uniformity of the mixing of each level of nutrients with a single mixer. Therefore, two mixers (second mixer 200 and third mixer 300) are required for mixing.

[0042] In summary, when the total mass of the prepared vitamin premix (its ingredient list is the formula for producing 3000g of vitamin premix mentioned above) is between 50kg and 300kg, biotin and VB12 are first placed in the second mixer 200 for first-stage mixing to obtain a first-stage mixture; then the first-stage mixture is placed in the third mixer 300, and VA powder, VD powder, VE powder, VK1 powder, VB1 (thiamine nitrate), VB2, VB6, folic acid, calcium pantothenate, nicotinamide, lutein (5%), taurine, and maltodextrin are placed in the third mixer 300 and mixed with the first-stage mixture to obtain a second-stage mixture; finally, VC is placed in the third mixer 300 and mixed with the second-stage mixture to obtain a complex nutrient.

[0043] In one possible implementation, when the mass of the prepared compound nutrient is between 300 kg and 500 kg, the following steps are taken: First, the nutrients in the ingredient list of the compound nutrient to be prepared, in the first unit quantity (0-1000 mg), are placed into the fourth mixer 400 for first-stage mixing to obtain a first-stage mixture; then, the first-stage mixture is placed into the fifth mixer 500; next, the nutrients in the ingredient list of the compound nutrient to be prepared, in the second unit quantity (1-1000 g), are placed into the fifth mixer 500 and mixed with the first-stage mixture to obtain a second-stage mixture; then, the second-stage mixture is placed into the sixth mixer 600; finally, the nutrients in the ingredient list of the compound nutrient to be prepared, in the third unit quantity (greater than 1 kg), are placed into the sixth mixer 600 and mixed with the second-stage mixture to finally obtain the compound nutrient. It should be noted that, since the total mass of the compound nutrients after preparation is extremely large, it is difficult to ensure the uniformity of the mixing of each level of nutrients even with two mixers. Therefore, this application uses three mixers (fourth mixer 400, fifth mixer 500 and sixth mixer 600) for mixing.

[0044] In summary, when the total mass of the prepared vitamin premix (its ingredient list is the formula for producing 3000g of vitamin premix mentioned above) is between 300kg and 500kg, biotin and VB12 are first mixed in the fourth mixer 400 to obtain the first-stage mixture; then the first-stage mixture is placed in the fifth mixer 500; then VA powder, VD powder, VE powder, VK1 powder, VB1 (thiamine nitrate), VB2, VB6, folic acid, calcium pantothenate, nicotinamide, lutein (5%), taurine, and maltodextrin are placed in the fifth mixer 500 and mixed with the first-stage mixture to obtain the second-stage mixture; then the second-stage mixture is placed in the sixth mixer 600; finally, VC is placed in the sixth mixer 600 and mixed with the second-stage mixture to obtain the final compound nutrients.

[0045] The calculation process for the coefficient of variation test of the prepared compound nutrients in this application is as follows; After the mixing process is completed, samples are taken from the first batch of bagged compound nutrients. Ten samples of equal mass are selected (sample numbers 1-10). Nutrients added in different unit quantities from the ingredient list of the compound nutrients are selected as target substances, such as taurine, vitamin B2, and vitamin B in vitamin premixes. 12 Iron and iodine in mineral premixes. Taurine, vitamin B2, and vitamin B1 were tested according to national standard testing methods. 12 The content of vitamins in 10 vitamin premix samples; the content of iron and iodine in 10 mineral premix samples was tested according to the national standard testing method.

[0046] average value: Standard deviation: Coefficient of variation: In the formula: X1, X2, ..., X 10 The values ​​represent the content of nutrients in 10 samples. S is the mean nutrient content; S is the standard deviation; CV is the coefficient of variation; a coefficient of variation ≤ 5% is considered acceptable, meaning that the uniformity of the compound nutrients meets the standard when the measured coefficient of variation is ≤ 5%.

[0047] The uniformity of compound nutrient mixing is generally related to four factors: the material loading capacity of the mixer, the stirring speed, the shear rate, and the mixing time. These factors are also likely to interact, resulting in a large number of experiments if a Design of Engineering (DOE) is performed. The loading capacity can be calculated from the equipment manual; the stirring speed and shear rate can be determined based on the material mixing state and the ratio of the stirring paddle radii between the small-scale and pilot-scale equipment. This transforms multiple factors into a single factor, requiring only the mixing time to be considered.

[0048] Measurement of mixing time for each mixer: The mixing time of the first mixer 100 (double motion mixer, capacity 100kg), the third mixer 300 (high-speed wet granulation machine, capacity 600kg), and the sixth mixer 600 (ribbon mixer, capacity 1000kg) was confirmed.

[0049] The formula for producing 3000g of vitamin premix is ​​as follows: VA powder (10%) 53g, VD powder (0.5%) 36g, VE powder (50%) 240g, VK1 powder (5%) 20g, VB1 (thiamine nitrate) 10g, VB2 6g, VB6 6g, folic acid 2g, biotin 0.2g, VB12 0.03g, calcium pantothenate 40g, nicotinamide 50g, lutein (5%) 15g, taurine 450g, VC 1500g; maltodextrin 571.77g. The VB6 content is 2mg / g. Each mixer was tested at its maximum load capacity.

[0050] The coefficient of variation test results for the first mixer 100 (dual-motion mixer) at mixing times of 15 minutes, 30 minutes, and 45 minutes are as follows: After comparing the data, it was determined that the optimal mixing time for mixing vitamin premixes using the first mixer 100 (dual motion mixer) is 30 minutes.

[0051] The coefficient of variation test results for the third mixer 300 (wet granulator) at mixing times of 2 minutes, 3 minutes, and 4 minutes are as follows: After comparing the data, it was determined that the optimal mixing time for mixing vitamin premixes using the third mixer 300 (wet granulator) is 3 minutes.

[0052] The coefficient of variation test results for the sixth mixer 600 (ribbon mixer) at mixing times of 5 minutes, 8 minutes, and 10 minutes are as follows: After comparing the data, it was determined that the optimal mixing time for mixing vitamin premixes using the sixth mixer 600 (ribbon mixer) is 8 minutes.

[0053] Other embodiment 1: In one possible implementation, when the mixer performs the first-stage mixing of nutrients in the form of a first unit quantity, it further includes: firstly, selecting a portion of nutrients from the second unit quantity and the third unit quantity to premix to obtain a premix; then, placing the first unit quantity of nutrients into the premix; then, selecting a portion of nutrients from the second unit quantity and mixing them into the first unit quantity of nutrients and the premix; and finally, mixing them together to obtain a first-stage mixture.

[0054] The standard ingredient list for a vitamin premix (total production weight 3kg) is as follows: VA powder (10%) 53g, VD powder (0.5%) 36g, VE powder (50%) 240g, VK1 powder (5%) 20g, VB1 (thiamine nitrate) 10g, VB2 6g, VB6 6g, folic acid 2g, biotin 0.2g, VB12 0.03g, calcium pantothenate 40g, nicotinamide 50g, lutein (5%) 15g, taurine 450g, VC 1500g, and maltodextrin 571.77g.

[0055] To produce a total of 12 kg of this vitamin premix, the amounts of each nutrient are as follows: VA powder (10%) 212 g, VD powder (0.5%) 144 g, VE powder (50%) 960 g, VK1 powder (5%) 80 g, VB1 (thiamine nitrate) 40 g, VB2 24 g, VB6 24 g, folic acid 8 g, biotin 0.8 g, VB12 0.12 g, calcium pantothenate 160 g, nicotinamide 200 g, lutein (5%) 60 g, taurine 1.8 kg, VC 6 kg, and maltodextrin 2.287 kg.

[0056] In one possible implementation, since the total production mass of the vitamin premix is ​​12 kg, a first three-dimensional production line is used to mix the vitamin premix. Further: S1: First, weigh 1 kg of taurine, 2 kg of vitamin C, and 1 kg of maltodextrin and place them into the first mixer 100 for premixing to obtain the premix; S2: Then, weigh 212 g of vitamin A powder, 144 g of vitamin D powder, 960 g of vitamin E powder, 80 g of vitamin K1 powder, 40 g of vitamin B1 (thiamine nitrate), 24 g of vitamin B2, 24 g of vitamin B6, 8 g of folic acid, 0.8 g of biotin, and 0.12 g of vitamin B12 and place them into the first mixer 100. S3: After the first stage of mixing, a primary mixture is obtained, and the mixing time for the first stage is 2 minutes; S4: Weigh 160g of calcium pantothenate, 200g of nicotinamide, 60g of lutein, 0.8kg of taurine and 1.287kg of maltodextrin and put them into the first mixer 100 for the second stage of mixing to obtain a secondary mixture, and the mixing time for the second stage is 5 minutes; S5: Weigh 4kg of vitamin C and add it to the first mixer 100 to mix with the secondary mixture for the third stage of mixing to obtain a complex nutrient, and the mixing time for the third stage is 30 minutes; S6: The mixed complex nutrient is transported to the packaging room for packaging through the conveyor pipe.

[0057] Preferably, the first mixer is a dual-motion mixer with a capacity of 100kg and a loading coefficient of 20-50%.

[0058] The coefficient of variation of the obtained 12 kg vitamin premix was tested: Other embodiment 2: In one possible implementation, when the mixer performs a first-stage mixing of nutrients in units of a first unit mass, it further includes either mixing a portion of nutrients selected from a second unit mass of nutrients into the first unit mass of nutrients, or mixing a portion of nutrients selected from a third unit mass of nutrients into the first unit mass of nutrients. Further, in this embodiment, a portion of nutrients selected from a second unit mass of nutrients is mixed into the first unit mass of nutrients.

[0059] As mentioned above, the standard ingredient list for a vitamin premix (total production weight of 3kg) is as follows: VA powder (10%) 53g, VD powder (0.5%) 36g, VE powder (50%) 240g, VK1 powder (5%) 20g, VB1 (thiamine nitrate) 10g, VB2 6g, VB6 6g, folic acid 2g, biotin 0.2g, VB12 0.03g, calcium pantothenate 40g, nicotinamide 50g, lutein (5%) 15g, taurine 450g, VC 1500g, and maltodextrin 571.77g.

[0060] For a total production weight of 210 kg of this vitamin premix, the amounts of each nutrient are as follows: VA powder (10%) 3.71 kg, VD powder (0.5%) 2.52 kg, VE powder (50%) 16.8 kg, VK1 powder (5%) 1.4 kg, VB1 (thiamine nitrate) 0.7 kg, VB2 0.42 kg, VB6 0.42 kg, folic acid 0.14 kg, biotin 14 g, VB12 2.1 g, calcium pantothenate 2.8 kg, nicotinamide 3.5 kg, lutein (5%) 1.05 kg, taurine 31.5 kg, VC 105 kg, and maltodextrin 40.024 kg.

[0061] Since the total production mass of vitamin premix is ​​210 kg, a second three-dimensional production line is used to mix the vitamin premix. Specifically, S1: First, weigh 0.7 kg of VB1 (thiamine nitrate), 0.42 kg of VB2, 0.42 kg of VB6, 0.14 kg of folic acid, 14 g of biotin, 2.1 g of VB12, and 3 kg of maltodextrin and place them into the second mixer 200 for the first stage of mixing to obtain the first-stage mixture. The mixing time for the first stage is 10 minutes. S2: Then, place the first-stage mixture into the third mixer 300, i.e., the first-stage mixture is transported to the third mixer 300 through a conveyor pipe. S3: Next, weigh 3.71 kg of VA powder, 2.52 kg of VD powder, 16.8 kg of VE powder, 1.4 kg of VK1 powder, and 2.8 kg of... S4: 105 kg of calcium pantothenate, 3.5 kg of nicotinamide, 1.05 kg of lutein, 31.5 kg of taurine, and 37.024 kg of maltodextrin are placed into the third mixer 300 and mixed with the primary mixture for a second stage to obtain the secondary mixture. The mixing time for the second stage is 2 minutes. S5: 105 kg of vitamin C is then placed into the third mixer 300 and mixed with the secondary mixture for a third stage to obtain the complex nutrients. The mixing time for the third stage is 3 minutes. S6: The mixed complex nutrients are transported to the packaging room for packaging through a conveyor pipe.

[0062] Preferably, the second mixer 200 is a three-dimensional mixer with a capacity of 10kg and a mixing loading coefficient of 20-50%; the third mixer 300 is a wet granulation mixer with a capacity of 600kg and a loading coefficient of 30-50%.

[0063] The coefficient of variation of the obtained 210 kg vitamin premix was tested: Other embodiment 3: In one possible implementation, when the mixer performs a first-stage mixing of nutrients in units of a first unit mass, it further includes either mixing a portion of nutrients selected from a second unit mass of nutrients into the first unit mass of nutrients, or mixing a portion of nutrients selected from a third unit mass of nutrients into the first unit mass of nutrients. Further, in this embodiment, a portion of nutrients selected from a second unit mass of nutrients is mixed into the first unit mass of nutrients.

[0064] Meanwhile, in one possible implementation, when the mixer performs a second-stage mixing of nutrients in a second-unit quantity with the first-unit mixture, it further includes mixing a portion of nutrients selected from the first-unit quantity of nutrients into the second-unit quantity of nutrients, or mixing a portion of nutrients selected from the third-unit quantity of nutrients into the second-unit quantity of nutrients. Further, in this embodiment, a portion of nutrients selected from the third-unit quantity of nutrients is mixed into the second-unit quantity of nutrients.

[0065] Meanwhile, in one possible implementation, when the mixer performs a third-stage mixing of nutrients in the third-unit order with the secondary mixture, it further includes mixing a portion of nutrients selected from the first-unit order with the nutrients in the third-unit order, or mixing a portion of nutrients selected from the second-unit order with the nutrients in the third-unit order. Further, in this embodiment, a portion of nutrients selected from the second-unit order are mixed with the nutrients in the third-unit order.

[0066] The standard ingredient list for a vitamin premix (total production weight 3kg) is as follows: VA powder (10%) 53g, VD powder (0.5%) 36g, VE powder (50%) 240g, VK1 powder (5%) 20g, VB1 (thiamine nitrate) 10g, VB2 6g, VB6 6g, folic acid 2g, biotin 0.2g, VB12 0.03g, calcium pantothenate 40g, nicotinamide 50g, lutein (5%) 15g, taurine 450g, VC 1500g, and maltodextrin 571.77g.

[0067] For a total production weight of 450 kg of this vitamin premix, the amounts of each nutrient are as follows: VA powder (10%) 7.95 kg, VD powder (0.5%) 5.4 kg, VE powder (50%) 36 kg, VK1 powder (5%) 3 kg, VB1 (thiamine nitrate) 1.5 kg, VB2 0.9 kg, VB6 0.9 kg, folic acid 0.3 kg, biotin 30 g, VB12 4.5 g, calcium pantothenate 6 kg, nicotinamide 7.5 kg, lutein (5%) 2.25 kg, taurine 67.5 kg, VC 225 kg, and maltodextrin 85.766 kg.

[0068] In one possible implementation, since the total production mass of vitamin premix is ​​450 kg, a third three-dimensional production line is used to mix the vitamin premix. Further: S1: First, weigh 1.5 kg of VB1 (thiamine nitrate), 0.9 kg of VB2, 0.9 kg of VB6, 0.3 kg of folic acid, 30 g of biotin, 4.5 g of VB12, and 1 kg of maltodextrin and place them into the fourth mixer 400 for first-stage mixing to obtain the first-stage mixture. The mixing time is 10 minutes. S2: Place the first-stage mixture into the fifth mixer 500, i.e., the first-stage mixture is transported to the fifth mixer 500 via a conveyor pipe. S3: Then weigh 7.95 kg of VA powder, 5.4 kg of VD powder, 36 kg of VE powder, and 3 kg of VK1 powder. 6 kg of calcium pantothenate, 7.5 kg of nicotinamide, 2.25 kg of lutein, 10 kg of taurine, 20 kg of vitamin C, and 8 kg of maltodextrin are placed into the fifth mixer 500 and mixed with the primary mixture to obtain the secondary mixture. The mixing time for the secondary mixture is 3 minutes. S4: The secondary mixture is placed into the sixth mixer 600, i.e., the secondary mixture is transported to the sixth mixer 600 through the conveying pipe. S5: 57.5 kg of taurine, 205 kg of vitamin C, and the remaining 76.766 kg of maltodextrin are weighed and placed into the sixth mixer 600 and mixed with the secondary mixture to obtain the compound nutrients. The mixing time for the third mixture is 8 minutes. S6: The mixed compound nutrients are transported to the packaging room for packaging through the conveying pipe.

[0069] Preferably, the fourth mixer 400 uses a three-dimensional mixer with a capacity of 10kg and a mixing loading coefficient of 20-50%; the fifth mixer 500 uses a wet granulation mixer with a capacity of 220kg and a loading coefficient of 30-50%; and the sixth mixer 600 uses a ribbon mixer with a capacity of 1000kg and a loading coefficient of 30-50%.

[0070] The coefficient of variation of the obtained 450 kg vitamin premix was tested: Other embodiment 4: The three-dimensional production lines of the compound nutrient mixing system of this application can also be applied to the mixing process of the following mineral premix formulations (ingredient list).

[0071] The standard ingredient list for a mineral premix (total production mass of 1000g) is as follows: 180g ferrous sulfate, 100g zinc sulfate, 10g copper sulfate, 5g manganese sulfate, 1.18g potassium iodide, 0.35g sodium selenite, and 703.47g maltodextrin.

[0072] If the total mass of the mineral premix is ​​10 kg, the amount of each nutrient used is as follows: ferrous sulfate 1.8 kg, zinc sulfate 1 kg, copper sulfate 100 g, manganese sulfate 50 g, potassium iodide 11.8 g, sodium selenite 3.5 g, and maltodextrin 7.035 kg.

[0073] In one possible implementation, since the total mass of the mineral premix is ​​10 kg, a first three-dimensional production line is used to mix the mineral premix. Further: S1: First, 1 kg of ferrous sulfate and 3 kg of maltodextrin are weighed and placed into the first mixer 100 for premixing to obtain the premix. The premixing time is 5 minutes. S2: Then, 0.8 kg of ferrous sulfate, 1 kg of zinc sulfate, 100 g of copper sulfate, 50 g of manganese sulfate, 11.8 g of potassium iodide, 3.5 g of sodium selenite, and 4.035 kg of maltodextrin are weighed and placed into the first mixer 100 for mixing to obtain the compound nutrients. The mixing time is 30 minutes. S3: The mixed compound nutrients are transported to the packaging room for packaging via a conveyor pipe.

[0074] The first mixer 100 is a dual-motion mixer with a capacity of 100 kg.

[0075] The coefficient of variation of the obtained 10 kg mineral premix was tested: Other embodiment 5: The standard ingredient list for a mineral premix (total production mass of 1 kg) is as follows: 180 g ferrous sulfate, 100 g zinc sulfate, 10 g copper sulfate, 5 g manganese sulfate, 1.18 g potassium iodide, 0.35 g sodium selenite, and 703.47 g maltodextrin.

[0076] If the total mass of the mineral premix is ​​260 kg, the amounts of each nutrient are as follows: ferrous sulfate 46.8 kg, zinc sulfate 26 kg, copper sulfate 2.6 kg, manganese sulfate 1.3 kg, potassium iodide 0.307 kg, sodium selenite 0.091 kg, and maltodextrin 182.902 kg.

[0077] In one possible implementation, since the total production mass of the mineral premix is ​​260 kg, a second three-dimensional production line is used to mix the mineral premix. Further: S1: First, weigh 1.6 kg of copper sulfate, 1 kg of manganese sulfate, 0.307 kg of potassium iodide, 0.091 kg of sodium selenite, and 2 kg of maltodextrin and place them into the second mixer 200 for first-stage mixing to obtain a first-stage mixture. The mixing time is 5 minutes. S2: Then, place the first-stage mixture into the third mixer 300, i.e., the first-stage mixture is transported to the third mixer 300 through a conveying pipe. S3: Place all remaining nutrients into the third mixer 300 and mix them with the first-stage mixture to obtain a compound nutrient. The mixing time is 3 minutes. S4: The mixed compound nutrient is transported to the packaging room for packaging through a conveying pipe.

[0078] The second mixer 200 is a three-dimensional mixer with a capacity of 10 kg.

[0079] The third mixer 300 is a wet granulation mixer with a capacity of 600 kg.

[0080] The coefficient of variation of the obtained 260 kg mineral premix was tested: Other embodiment 6: The standard ingredient list for a mineral premix (total production mass of 1 kg) is as follows: 180 g ferrous sulfate, 100 g zinc sulfate, 10 g copper sulfate, 5 g manganese sulfate, 1.18 g potassium iodide, 0.35 g sodium selenite, and 703.47 g maltodextrin.

[0081] If the total mass of this mineral premix is ​​470 kg, then the amounts of each nutrient in the ingredient list are as follows: ferrous sulfate 84.6 kg, zinc sulfate 47 kg, copper sulfate 4.7 kg, manganese sulfate 2.35 kg, potassium iodide 0.555 kg, sodium selenite 0.165 kg, and maltodextrin 330.631 kg.

[0082] In one possible implementation, since the total mass of the mineral premix is ​​470 kg, a third-dimensional production line is used to mix the mineral premix. Further: S1: First, weigh 2.35 kg of manganese sulfate, 0.555 kg of potassium iodide, 0.165 kg of sodium selenite, and 2 kg of maltodextrin and place them into the fourth mixer 400 for first-stage mixing to obtain the first-stage mixture. The first-stage mixing time is 10 minutes. S2: Place the first-stage mixture into the fifth mixer 500, i.e., transport the first-stage mixture to the fifth mixer 500 via a conveying pipeline. S3: Then weigh 40 kg of ferrous sulfate, 47 kg of zinc sulfate, 4.7 kg of copper sulfate, and 10 kg of maltodextrin and place them into the fifth mixer 500 to perform a second-stage mixing with the first-stage mixture to obtain... S4: The secondary mixture is placed into the sixth mixer 600, which is transported to the sixth mixer 600 through a conveying pipe; S5: 44.6 kg of ferrous sulfate and 318.631 kg of maltodextrin are weighed and placed into the sixth mixer 600 to be mixed with the secondary mixture in the third stage to obtain the compound nutrients. The mixing time for the third stage is 8 minutes; S6: The mixed compound nutrients are transported to the packaging room for packaging through a conveying pipe.

[0083] The fourth mixer 400 is a three-dimensional mixer with a capacity of 10kg.

[0084] The fifth mixer 500 is a wet granulation mixer with a capacity of 220kg.

[0085] The sixth mixer 600 is a ribbon mixer with a capacity of 1000kg.

[0086] The coefficient of variation of the obtained 470 kg mineral premix was tested: The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A compound nutrient mixing system employing a step-by-step scale-up mixing method, characterized in that, Includes two or more automated production lines; Each of the three-dimensional production lines includes a mixer, which is used to prepare compound nutrients by a step-by-step scale-up mixing method. When preparing compound nutrients using a progressively scaled-up mixing method through the mixer, the mixer first mixes each nutrient in the ingredient list of the compound nutrient to be prepared at the first unit mass level to obtain a first-stage mixture. Furthermore, the mixer is also suitable for mixing each nutrient in the ingredient list of the compound nutrient to be prepared at the second unit level with the primary mixture to obtain a secondary mixture; The mixer is also suitable for mixing each nutrient in the ingredient list of the compound nutrient to be prepared (at the third unit level) with the secondary mixture in a third-stage mixing process to obtain the compound nutrient. The first unit order of magnitude, the second unit order of magnitude, and the third unit order of magnitude are of different magnitudes and increase progressively. Among them, two or more of the three-dimensional production lines are used to formulate the compound nutrients of different qualities.

2. The compound nutrient mixing system according to claim 1, characterized in that, When the mixer performs a first-stage mixing of nutrients in the first unit quantity, it further includes mixing a portion of nutrients selected from the second unit quantity of nutrients with the first unit quantity of nutrients, or mixing a portion of nutrients selected from the third unit quantity of nutrients with the first unit quantity of nutrients.

3. The compound nutrient mixing system according to claim 1, characterized in that, When the mixer performs a second-stage mixing of the nutrients in the second unit quantity with the first-stage mixture, it also includes mixing a portion of the nutrients in the third unit quantity with the nutrients in the second unit quantity.

4. The compound nutrient mixing system according to claim 1, characterized in that, When the mixer performs a third-stage mixing of the nutrients in the third unit quantity with the secondary mixture, it also includes mixing a portion of the nutrients in the second unit quantity with the nutrients in the third unit quantity.

5. The compound nutrient mixing system according to claim 1, characterized in that, The three-dimensional production line consists of three lines: the first three-dimensional production line, the second three-dimensional production line, and the third three-dimensional production line. The first three-dimensional production line includes: a first mixer; suitable for situations where the mass of the compound nutrient after preparation is less than 50 kg, the mixing process of the compound nutrient is completed in the first mixer; The second three-dimensional production line includes a second mixer and a third mixer, and the discharge port of the second mixer is connected to the inlet of the third mixer through a conveying pipe; it is suitable for situations where the mass of the compound nutrient after preparation is between 50kg and 300kg, and the mixing process of the compound nutrient is completed sequentially in the second mixer and the third mixer; The third three-dimensional production line includes a fourth mixer, a fifth mixer, and a sixth mixer; the outlet of the fourth mixer is connected to the inlet of the fifth mixer via a conveying pipe, and the outlet of the fifth mixer is connected to the inlet of the sixth mixer via a conveying pipe; it is suitable for situations where the mass of the compound nutrient after preparation is between 300kg and 500kg, and the mixing process of the compound nutrient is completed sequentially in the fourth mixer, the fifth mixer, and the sixth mixer.

6. A step-by-step scale-up mixing method, characterized in that, The compound nutrient mixing system according to any one of claims 1-5 comprises: The first-level mixture is obtained by first-stage mixing of each nutrient in the ingredient list of the compound nutrient to be prepared, which is in the first unit mass order. The second-level mixture is obtained by mixing each nutrient in the ingredient list of the compound nutrient to be prepared with the first-level mixture in a second-level mixture. The compound nutrient is obtained by mixing each nutrient in the third unit mass order of the ingredient list of the compound nutrient to be prepared with the secondary mixture in a third-level mixing process. The first unit order of magnitude, the second unit order of magnitude, and the third unit order of magnitude are of different magnitudes and increase progressively.

7. The step-by-step scale-up mixing method according to claim 6, characterized in that, When the mass of the compound nutrients after preparation is less than 50 kg; First, place each nutrient in the ingredient list of the compound nutrient to be prepared, with a mass of the first unit level, into the first mixer for first-stage mixing to obtain the first-stage mixture. Next, each nutrient in the ingredient list of the compound nutrient to be prepared, with a mass of the second unit level, is placed into the first mixer and mixed with the first-stage mixture to obtain the second-stage mixture. Finally, each nutrient in the ingredient list of the compound nutrient to be prepared, with a mass of the third unit level, is placed into the first mixer and mixed with the secondary mixture in a third stage to obtain the compound nutrient.

8. The step-by-step scale-up mixing method according to claim 7, characterized in that, When the mass of the compound nutrients after preparation is between 50 kg and 300 kg; First, place each nutrient in the ingredient list of the compound nutrient to be prepared, with a mass of the first unit level, into the second mixer for first-stage mixing to obtain the first-stage mixture. The primary mixture is then placed into the third mixer; Next, each nutrient in the ingredient list of the compound nutrient to be prepared, with a mass of the second unit level, is placed into the third mixer and mixed with the first-stage mixture to obtain the second-stage mixture. Finally, each nutrient in the ingredient list of the compound nutrient to be prepared, with a mass of the third unit level, is placed into the third mixer and mixed with the secondary mixture in the third stage to obtain the compound nutrient.

9. The step-by-step scale-up mixing method according to claim 8, characterized in that, When the mass of the compound nutrients after preparation is between 300 kg and 500 kg; First, place each nutrient in the ingredient list of the compound nutrient to be prepared, with a mass of the first unit level, into the fourth mixer for first-stage mixing to obtain the first-stage mixture. The primary mixture is then placed into the fifth mixer; Next, each nutrient in the ingredient list of the compound nutrient to be prepared, with a mass of the second unit level, is placed into the fifth mixer and mixed with the first-stage mixture to obtain the second-stage mixture. The secondary mixture is then placed into the sixth mixer; Then, each nutrient in the ingredient list of the compound nutrient to be prepared, with a mass of the third unit level, is placed into the sixth mixer and mixed with the secondary mixture in the third stage to obtain the compound nutrient.

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