Composition for milk tablet production, preparation method thereof and milk tablet

Abstract

The invention provides a composition for producing milk tablets, a preparation method of the composition and the milk tablets. The composition is prepared from the following raw materials in percentage by mass: 70-80% of liquid milk raw materials, 15-20% of solid syrup and 0-15% of skim milk powder, wherein the total mass of the raw materials for preparing the composition is 100%. According to the preparation method, the production speed of the produced base powder in subsequent milk tablet pressing is increased to 200,000 tablets per hour by accurately controlling core parameters of the working sections of concentration, drying and the like, the hardness of the milk tablets is increased to 70-95N, and the stability of batch production of products is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of milk tablets, and more specifically to a composition for milk tablet production, a method for preparing the same, and the milk tablets themselves. Background Technology

[0002] Currently, the wet-process production of milk tablet base powder in the industry mainly includes steps such as concentration, drying, and granulation. However, the control of key process parameters (such as concentration density, drying temperature, and pressure) is relatively crude, and a systematic parameter optimization scheme has not been formed. Existing technologies mostly rely on empirical values ​​for adjustment, which cannot guarantee the consistency of the physical properties of the base powder, thus affecting the efficiency of subsequent pressing stages and product performance.

[0003] In the existing wet process for producing milk tablet base powder, the lack of precise control over key process parameters leads to the following problems in the subsequent milk tablet pressing process: Low production efficiency: When using ordinary whole milk or milk tablet base powder as the main raw material in the formula for direct pressing, the production speed is only 140,000 tablets / hour. Insufficient product hardness: Milk tablets typically have a hardness of 40-60N, making them brittle and affecting product quality; Poor batch stability: The physical properties of the base powder, such as flowability and density, fluctuate greatly, which can easily lead to problems such as material blockage and uneven molding during continuous production, resulting in a production speed of only 120,000-140,000 pieces / hour.

[0004] Existing wet processing methods for handling compound formulations containing skim milk powder and solid corn syrup suffer from problems due to improper control of concentration density (e.g., <1130 kg / m³). 3 This results in loose particles, >1160kg / m³ 3 This can lead to problems such as excessive hardness, fluctuations in drying temperature (e.g., main air intake <160℃, resulting in insufficient drying), poor base powder flowability (angle of repose >35°), insufficient tablet hardness (<60N), and batch RSD >8%, which cannot meet the production requirements of high milk solids milk tablets.

[0005] Therefore, developing a milk tablet base powder that can stably and efficiently produce milk tablets while ensuring the hardness and stability of the milk tablets is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] One object of the present invention is to provide a composition for the production of milk tablets.

[0007] Another object of the present invention is to provide a method for preparing the above-described composition.

[0008] Another object of the present invention is to provide a milk tablet.

[0009] On one hand, the present invention provides a composition for the production of milk tablets, wherein the raw materials used to prepare the composition, by weight of 100%, comprise 70%-80% liquid milk raw materials, 15%-20% solid syrup and 0-15% skim milk powder.

[0010] According to a specific embodiment of the present invention, preferably, the liquid milk raw material is one or both of raw cow's milk and raw soy milk; the solid syrup is solid corn syrup.

[0011] According to a specific embodiment of the present invention, it is preferably a powder.

[0012] According to a specific embodiment of the present invention, preferably, when the milk tablets produced by the composition are whole milk tablets, the raw material composition includes 80% raw milk and 20% solid corn syrup, based on the total mass of the raw materials used to prepare the composition being 100%.

[0013] According to a specific embodiment of the present invention, preferably, when the milk tablets produced by the composition are low-fat milk tablets, the raw material composition, based on the total mass of the raw materials used to prepare the composition as 100%, includes: 70% raw milk, 15% solid corn syrup and 15% skim milk powder.

[0014] According to a specific embodiment of the present invention, preferably, when the milk tablets produced by the composition are high-calcium / high-protein fortified milk tablets, the raw material composition, based on the total mass of the raw materials used to prepare the composition as 100%, includes: 75% raw milk, 15% solid corn syrup, and 10% skim milk powder.

[0015] On the other hand, the present invention also provides a method for preparing the above-mentioned composition, which includes the following steps: mixing and dissolving liquid milk raw materials, solid syrup and skim milk powder, preheating, homogenizing and sterilizing to obtain a liquid, concentrating the liquid to obtain a concentrated liquid, preheating the concentrated liquid and spray drying it to obtain a dried powder, cooling the dried powder and sieving it to obtain a composition product for milk tablet production; The outlet density of the concentrate is 1130-1160 kg / m³. 3 ; The preheating temperature is 60-80℃; The main inlet air temperature of the spray dryer is 160-190℃, the main exhaust air temperature is 90-98℃, and the fluidized bed temperature is 60-70℃. The pressure of the high-pressure pump pipeline for spray drying is 210-230 bar.

[0016] The spray nozzle model is 072, and the guide plate model is SE.

[0017] According to a specific embodiment of the present invention, preferably, the outlet density of the concentrate is 1145 kg / m³. 3 ; According to a specific embodiment of the present invention, preferably, the preheating temperature is 70°C; According to a specific embodiment of the present invention, preferably, the main inlet air temperature of the spray dryer is 175°C, the main exhaust air temperature is 95°C, and the fluidized bed temperature is 65°C; According to a specific embodiment of the present invention, preferably, the pressure of the high-pressure pump pipeline for spray drying is 220 bar.

[0018] According to a specific embodiment of the present invention, preferably, the liquid milk raw material is raw soybean milk, and the main air intake temperature is 160-170℃.

[0019] On the other hand, the present invention also provides a milk tablet, which is obtained by pressing the above-mentioned composition.

[0020] According to a specific embodiment of the present invention, preferably, the hardness of the milk tablet is 70-95N.

[0021] According to a specific embodiment of the present invention, preferably, the hardness of the milk tablet is 80-95N.

[0022] According to a specific embodiment of the present invention, preferably, the relative standard deviation (RSD) of the stability of the milk tablets is less than or equal to 2.8.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention provides a method for controlling key process parameters in the wet production of milk tablet base powder. By precisely controlling the core parameters of stages such as concentration and drying, the production speed of the base powder in subsequent milk tablet pressing can be increased to 200,000 tablets / hour, and the hardness of the milk tablets can be increased to 70-95N; significantly improving the stability of mass production. The process parameters of this invention (concentrated outlet density 1140-1150 kg / m³) 3 The method (including drying temperature gradient, high-pressure pump pressure, etc.) is universally applicable to all wet-process base powders based on raw milk (with or without skim milk powder and syrup), and can even be extended to wet-process base powders of plant proteins (with fine-tuning of temperature parameters). The resulting base powder has uniform particle size, good flowability (angle of repose < 30°), and stable tablet hardness of 70-95N after compression. Production speed is increased to 200,000 tablets / hour (more than 40% improvement over traditional processes). Milk tablets produced from this base powder have a batch production RSD ≤ 2.5%, far superior to the 8-10% of traditional processes. This invention achieves this by concentrating the density (1130-1160 kg / m³). 3The coordinated control of the drying temperature gradient (main air intake 160-190℃ + exhaust 90-98℃), combined with the matching of high pressure pump pressure (210-230 bar) and nozzle / guide plate, has for the first time achieved a balance of 'high fluidity + high hardness + low fluctuation' in wet-process base powder under complex formulations, with effects far exceeding those of traditional processes that optimize single parameters. Detailed Implementation

[0024] In order to provide a clearer understanding of the technical features, objectives and beneficial effects of the present invention, the technical solution of the present invention will now be described in detail below, but it should not be construed as limiting the scope of implementation of the present invention.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0026] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this invention can be purchased from the market or prepared by existing methods.

[0027] It should be understood that the terms “comprising,” “including,” and / or “containing” as used herein specify the presence of the stated features, integers, steps, components, or combinations thereof, but do not exclude the presence or addition of one or more other features, integers, steps, components, or combinations thereof.

[0028] The endpoints and any values ​​of the ranges disclosed in this invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this invention.

[0029] Example 1

[0030] This embodiment provides a milk tablet base powder. Based on the total mass of the raw materials used to prepare the milk tablet base powder (100%), its raw material composition includes: 70% raw milk, 15% solid corn syrup, and 15% skim milk powder. The specific preparation method is as follows: Liquid raw milk, solid corn syrup, and skim milk powder are mixed, dissolved, preheated, homogenized, and sterilized to obtain a feed solution. This feed solution is then concentrated, with an outlet density of 1145 kg / m³. 3The concentrated liquid is obtained, and then spray-dried after preheating. The preheating temperature is 70℃, the main air inlet temperature is 175℃, the main exhaust temperature is 95℃, the static fluidized bed temperature is 65℃, the high-pressure pump pressure is 220 bar, the spray drying instrument model is [model number missing], the nozzle model is 072, and the guide plate model is SE. The dried powder is obtained, and the dried powder is cooled and sieved to obtain the milk tablet base powder product for milk tablet production.

[0031] Example 2

[0032] This embodiment provides a milk tablet base powder. Based on the total mass of the raw materials used to prepare the milk tablet base powder (100%), its raw material composition includes: 70% raw milk, 15% solid corn syrup, and 15% skim milk powder. The specific preparation method is as follows: Liquid raw milk, solid corn syrup, and skim milk powder are mixed, dissolved, preheated, homogenized, and sterilized to obtain a feed solution. This feed solution is then concentrated to an outlet density of 1130 kg / m³. 3 The concentrated liquid is obtained, and then spray-dried after preheating. The preheating temperature is 70℃, the main air inlet temperature is 160℃, the main exhaust temperature is 90℃, the static fluidized bed temperature is 65℃, the high-pressure pump pressure is 210 bar, the spray drying instrument model is [model number missing], the nozzle model is 072, and the guide plate model is SE. The dried powder is obtained, and the dried powder is cooled and sieved to obtain the milk tablet base powder product for milk tablet production.

[0033] Comparative Example 1 (Concentrated outlet density too low)

[0034] This comparative example provides a milk tablet base powder, except that the concentration outlet density is changed to 1120 kg / m³. 3 Everything else is the same as in Example 1.

[0035] Comparative Example 2 (Main Inlet Air Temperature Too Low)

[0036] This comparative example provides a milk tablet base powder, which is the same as Example 1 except that the main air intake temperature is changed to 150°C.

[0037] Comparative Example 3 (Main exhaust air temperature too high)

[0038] This comparative example provides a milk tablet base powder, which is the same as Example 1 except that the main exhaust temperature is changed to 100°C.

[0039] Comparative Example 4 (High-pressure pump pressure too low)

[0040] This comparative example provides a milk tablet base powder, which is the same as Example 1 except that the pressure of the high-pressure pump is changed to 200 bar.

[0041] Comparative Example 5 (changing the eye spray type)

[0042] This comparative example provides a milk tablet base powder, which is the same as Example 1 except that the spray model is changed to 080.

[0043] Comparative Example 6 (with a different deflector model)

[0044] This comparative example provides a milk tablet base powder, which is the same as Example 1 except that the guide plate model is changed to SF.

[0045] The effects of the milk tablets produced using the above-mentioned base powder are shown in Table 1.

[0046] Table 1

[0047] The results above show that if the concentrated outlet density is <1130 kg / m³ 3 (Comparative Example 1) The base powder particles are loose and easily break during pressing; if >1160 kg / m 3 Excessive hardness of the base powder leads to poor flowability and mold blockage during pressing. Main air inlet temperatures below 160℃ (comparative example) or above 190℃ result in insufficient or excessive drying, affecting the uniformity of base powder moisture content. Excessively high main exhaust temperatures (comparative example 3) also cause over-drying. High-pressure pump pipeline pressure below 210 bar (comparative example 4) results in poor atomization and uneven particle size; above 230 bar, the equipment load is too high, posing a safety risk. Replacing the nozzle and guide plate models (comparative examples 5 and 6) affects atomization and airflow distribution, leading to uneven airflow, large fluctuations in base powder moisture content, and unstable hardness. Therefore, the parameters of the wet process for producing milk tablet base powder provided by this invention play a crucial role in increasing the milk tablet production speed to 200,000 tablets / hour, improving the hardness of the milk tablets to 70-95N, and enhancing the stability of mass production.

[0048] The above embodiments illustrate and describe the main features and advantages of the present invention in detail. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A composition for producing a milk tablet, the composition comprising, based on the total mass of the raw materials used to make the composition being 100%, raw materials consisting of: 70%-80% of liquid milk raw material, 15%-20% of solid sugar syrup and 0-15% of skimmed milk powder.

2. The composition of claim 1, wherein, The liquid milk raw material is one or both of raw cow milk and raw soybean milk; the solid sugar syrup is solid corn syrup.

3. The composition of claim 1, which is a powder.

4. A process for the preparation of a composition according to any one of claims 1 to 3 comprising the steps of: The liquid milk raw material, the solid sugar syrup and the skimmed milk powder are mixed, dissolved, preheated, homogenized and sterilized to obtain a feed liquid, the feed liquid is concentrated to obtain a concentrated feed liquid, the concentrated feed liquid is preheated and then spray dried to obtain a dried powder, and the dried powder is cooled and sieved to obtain a composition product for milk tablet production. wherein the concentrated outlet density is 1130-1160 kg / m 3 ; Preferably, the preheating temperature is 70°C. Preferably, the main air inlet temperature of the spray drying is 175°C, the main air outlet temperature is 95°C, and the fluidized bed temperature is 65°C. Preferably, the high-pressure pump pipeline pressure of the spray drying is 220 bar. Preferably, the spray drying nozzle type is 072, and the deflector type is SE.

5. The production method according to claim 4, wherein The concentrated outlet density is 1145 kg / m 3 ; Preferably, the preheating temperature is 70°C. Preferably, the main air inlet temperature of the spray drying is 175°C, the main air outlet temperature is 95°C, and the fluidized bed temperature is 65°C. Preferably, the high-pressure pump pipeline pressure of the spray drying is 220 bar.

6. The production method according to claim 4, wherein The liquid milk raw material is raw soybean milk, and the main air inlet temperature is 160-170°C.

7. A milk tablet, which is obtained by pressing the composition of any one of claims 1-3.

8. The milk tablet according to claim 7, wherein, The hardness of the milk tablet is 70-95 N.

9. The milk tablet according to claim 7, wherein, The hardness of the milk tablet is 80-95 N.

10. The milk tablet according to claim 7, wherein, The stability of the milk tablet has a relative standard deviation of less than or equal to 2.8.

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