CN110463762B - Infant formula milk powder capable of quickly defoaming and production method thereof - Google Patents
Infant formula milk powder capable of quickly defoaming and production method thereof Download PDFInfo
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Abstract
The invention provides infant formula milk powder capable of quickly defoaming and a production method thereof. The method comprises the steps of dissolving phospholipid in oil raw materials, then dispersing the oil raw materials in milk powder liquid through homogenization, and introducing compressed gas before spray drying. The invention also provides the infant formula milk powder capable of quickly defoaming, which is produced by the method. The infant formula milk powder produced by the invention is dissolved after being mixed, and generates a lot of large bubbles and few small bubbles after being vigorously shaken. The large bubbles are further fused and rapidly broken, and basically disappear in 5-30 seconds, and the bubbles of the common infant formula powder still exist after being placed for 30 minutes under the same condition.
Description
Technical Field
The invention relates to infant formula milk powder capable of quickly defoaming and a production method thereof, and belongs to the technical field of production of infant formula milk powder.
Background
When the infant sucks milk through the feeding bottle, the nipple deforms when the infant does not exchange air for a long time or the sucking speed is too high, so that the infant cannot suck the milk any more. Under the condition that the infant continuously sucks, the gas in the feeding bottle is less and less, and the pressure difference between the inside and the outside of the feeding bottle is gradually increased, so that the nipple is more easily shriveled, when the air pressure in the bottle is lower, the air enters through the air inlet hole at the bottom of the nipple, and the liquid in the feeding bottle is released to the space at the bottom of the bottle, so that a large number of continuous bubbles are generally generated. Part of the air bubbles enter the space without milk in the bottle, and part of the air bubbles are dissolved in the liquid and eaten into the abdomen by the infant.
Secondly, when the milk is mixed, parents shake the feeding bottle up and down violently due to improper mixing to generate a large amount of bubbles, and the bubbles exist in the feeding bottle and the milk for a long time.
Because the vegetative nerve of the diaphragm of an infant is not well developed, when the infant sucks liquid containing bubbles or inhales air, the infant can belch. In clinical statistics, when an infant eats air, abdominal distension, abdominal pain and the like can be caused, which is also the reason why the infant must perform hiccups when eating milk.
Reasons and change process of infant formula powder bubbles
The occurrence of air bubbles in milk is mainly caused by the change of solution surface tension and viscosity of the milk during stirring or brewing. The main component of the infant formula milk powder for generating bubbles is protein, and because the infant formula milk powder contains a large amount of high-protein whole milk powder, whey protein powder, skimmed milk powder and the like, a large amount of bubbles are easily generated in the brewing process.
The evolution process of the foam can be divided into the following three processes:
1. change from small bubbles to large bubbles
Because of the surface tension of the bubble film, the pressure in the bubble is larger than the external pressure, and the pressure difference between the bubble and the external pressure is as follows:
Δ P = surface tension of bubble face x correction factor (K)/bubble volume
＝γ·(4πR 2 )·K/(4/3·π·R 3 )
＝6γ·K/R
From the above formula, Δ P is inversely proportional to the bubble radius R, and when a small bubble contacts a large bubble, gas is continuously diffused from the high-pressure region of the small bubble to the large bubble through adsorption, dissolution, and desorption.
2. Thinning of bubble film
As the standing time is prolonged, the liquid on the bubble film is vaporized and discharged downwards by gravity, and the bubble film becomes thinner gradually.
3. Rupture of bubble film
Generally, when the bubble film is thinned to about 30 nm, the surface tension of the film is reduced, liquid drainage is quicker, the film becomes brittle and is difficult to bear the thermal motion of molecules, and the bubbles can be broken instantly.
There are many factors that affect the foaming properties of proteins, viscosity has a large effect on protein stability, and a high viscosity material contributes to foam formation and stabilization. The sugar has viscosity and certain chemical stability, and a large amount of lactose is added in the production process of the milk powder to enhance the foaming property of the protein. The surface tension of the grease is large, the protein foam is thin, when the grease contacts the protein bubbles, the surface tension of the grease is larger than the extension force of the protein film, the protein film is broken, the gas escapes from the broken part, and the bubbles disappear immediately. pH has a great influence on the formation and stability of protein foam. Proteins are very foaming but unstable at pH 6.5-9.5. When the protein is beaten, acid or acidic substance is added to adjust the pH value of the protein and deviate from the isoelectric point of the protein, so that the solubility and viscosity of the protein are enhanced, and the foamability and foam stability of the protein are enhanced.
How to avoid the foaming of the infant formula is one of the problems to be solved urgently in the field.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide the infant formula milk powder capable of quickly defoaming and the preparation method thereof, and the infant formula milk powder can be quickly defoamed by changing the process technology under the condition of not changing the ingredients of the milk powder. This milk powder can guarantee that milk liquid is at the in-process that the infant sucked, and the bubble in the feeding bottle can most be eliminated, can not make baby's inhaled air, causes phenomenons such as hiccup.
In order to achieve the above objects, the present invention provides a method for producing infant formula milk powder with rapid defoaming, comprising the steps of dissolving phospholipids in oil raw materials of milk powder, then dispersing the phospholipids in milk powder liquid by homogenization, and introducing compressed gas before spray drying.
In the production method provided by the invention, the addition amount of the phospholipid is preferably 2-20 kg/ton based on the total weight of the formula milk powder.
In the production method provided by the present invention, preferably, the compressed gas is added after the concentration of the feed liquid and before the spray drying.
The invention is characterized in that during production, phospholipid in milk powder ingredients is dissolved in fat-soluble oil (such as peanut oil, high oleic sunflower oil, palm oil, coconut oil, anhydrous cream, walnut oil and the like), added into feed liquid, and subjected to high-pressure homogenization (the primary homogenization pressure is 100-150bar, and the secondary homogenization pressure is 30-50 bar) to form tiny phospholipid particles to be suspended in milk liquid; then before concentrating to spray drying, introducing compressed gas into the milk, wherein the compressed gas in the milk is suddenly reduced along with the sudden reduction of the pressure to generate the effect of sudden 'explosion' of the compressed gas, so that the milk is changed into finer liquid drops; and then the powder is formed by spray drying, so that not only can excellent powder particles be formed, but also the phospholipid is uniformly dispersed among every milk powder particle, so that the milk powder can be quickly defoamed after being brewed. Only after letting in gas, spray drying again can play the effect, otherwise, not by the milk that lets in compressed air, can not be burst, can not have the defoaming effect.
The invention adds phospholipid (soybean phospholipid) into the formula milk powder, and adds the phospholipid into the milk powder liquid to promote dissolution. During mixing, the phospholipid is used as an emulsifier, so that the interfacial tension of the milk is dispersed and reduced to the maximum extent, more large bubbles are formed, and the viscosity of the feed liquid can be reduced, so that the bubbles are further fused and are quickly broken.
According to a particular embodiment of the invention, preferably, the production method comprises the following steps:
metering and storing the powder raw materials of the milk powder;
metering, dissolving and storing the nutrients;
metering, melting and storing the oil raw materials; wherein, the phospholipid is melted together with the oil raw material (preferably anhydrous butter), and specifically can be: before production, after starting steam to reach a specified oil temperature, various oil raw materials and phospholipid are melted and pumped into an oil storage tank through an oil pump;
pumping the pure water into a wet mixing tank, heating, namely pumping the pure water into the wet mixing tank after metering according to production requirements, wherein the heating temperature can be controlled according to requirements;
when the temperature, the liquid level (the liquid level after pure water is added) and the vacuum degree of the vacuum mixing tank reach set values (the set values can be controlled according to requirements), sucking the powder raw materials, the oil raw materials and the phospholipid into the vacuum mixing tank, adding the nutrients from the wet mixing tank, and circulating the materials between the vacuum mixing tank and the wet mixing tank; after the material mixing is finished, emptying the material liquid from the vacuum material mixing tank to a wet material mixing tank;
homogenizing the feed liquid, and concentrating the homogenized feed liquid to make the dry matter content of the feed liquid reach 43-53%; preferably, a triple-effect evaporation process is adopted for concentration;
injecting compressed gas into the concentrated feed liquid;
and (4) carrying out spray drying on the feed liquid injected with the compressed gas to obtain the milk powder. The spray drying can be carried out by adopting a spray drying tower, fine powder can be collected by utilizing a cyclone separator, and the collected fine powder is returned to the top of the spray drying tower.
In the above production method, preferably, the pressure for homogenization is 110 to 150bar.
In the above production method, preferably, the compressed gas is carbon dioxide or nitrogen, more preferably carbon dioxide. The carbon dioxide can be partially dissolved in water, and the defoaming performance of the milk powder is slightly better than that of nitrogen due to the explosion effect of the dissolved carbon dioxide generated by spray drying. The introduced compressed gas is sterile and clean gas.
In the above production method, preferably, the pressure of the compressed gas is 5 to 20bar and the flow rate is 0.2 to 5kg/h.
In the above production method, preferably, the air inlet temperature during spray drying is 160-190 ℃, the air exhaust temperature is 70-90 ℃, and the temperature of the feed liquid entering the spray drying is 40-60 ℃.
According to a specific embodiment of the present invention, the formula of the infant formula may be any infant formula, and the raw materials thereof may be those commonly used in the art.
In the above production method, preferably, the powder material includes one or a combination of several of whole milk powder, skim milk powder, desalted whey powder D90, lactose, whey protein powder, soybean oil, peanut oil, galacto-oligosaccharide syrup, fructo-oligosaccharide powder, and the like.
In the above production method, preferably, the nutrient includes one or a combination of several of L-ascorbic acid, taurine, lactose, dl- α -tocopherol acetate, retinyl acetate, nicotinamide, cholecalciferol, D-calcium pantothenate, menadione, lutein, thiamine nitrate, pyridoxine hydrochloride, riboflavin, folic acid, D-biotin, cyanocobalamine, ferrous sulfate, zinc sulfate, copper sulfate, sodium selenite, manganese sulfate, potassium iodide, potassium chloride, magnesium chloride, choline chloride, and the like.
In the above production method, preferably, the oil raw material (i.e., fat-soluble oil) includes one or a combination of more of peanut oil, high oleic sunflower oil, palm oil, coconut oil, anhydrous cream, walnut oil, and the like.
The invention also provides the infant formula milk powder produced by the production method.
In fact, the generation of bubbles in the infant formula powder is a high-quality symbol, but the invention can generate a large amount of bubbles in the infant formula powder and can be quickly fused into large bubbles and defoam quickly by a physical method under the condition of not changing the quality of milk powder. Ensures that most of air bubbles in the milk bottle can be eliminated when the milk is sucked by infants. The baby can not inhale air and hiccup.
The infant formula milk powder produced by the invention can generate a plurality of large bubbles after being dissolved after being mixed and shaken vigorously, and the large bubbles contain a few small bubbles, are further fused and quickly broken and basically disappear in 5-30 seconds, and the bubbles of the common infant formula powder still exist after being placed for 30 minutes under the same condition.
Drawings
FIG. 1 shows the initial bubble height of reconstituted milk powder in the test of the effect of different air intake speeds on the antifoaming effect.
FIG. 2 is a graph showing the effect of different air inlet speeds on the defoaming effect, wherein the bubble height of the reconstituted milk powder is 30 seconds after the reconstituted milk powder is allowed to stand.
Fig. 3 is a graph showing the effect of different air inlet speeds on the antifoaming effect of the reconstituted milk powder as measured by the bubble height after 30 minutes of standing.
FIG. 4 is the initial bubble height of reconstituted milk powder in the test of the effect of different gases on the anti-foaming effect.
FIG. 5 is a graph showing the effect of different gases on the defoaming effect of the reconstituted milk powder, after standing for 30 seconds.
FIG. 6 shows the effect of different gases on the defoaming effect of reconstituted milk powder after 30 minutes of standing.
Detailed Description
The technical solutions of the present invention will be described in detail below in order to clearly understand the technical features, objects, and advantages of the present invention, but the present invention is not limited to the practical scope of the present invention.
For comparison purposes, all formulations of the milk powders were used as a uniform formulation (based on the total weight of the milk powder) except for the oil-based materials, as shown in table 1.
TABLE 1
Example 1
This example provides a method for producing a fast defoaming formula milk powder, the oil raw materials of which include 23kg soybean oil, 80kg high oleic sunflower oil, 25kg corn oil and 1kg anhydrous butter, and the other raw materials are shown in table 1. The production method comprises the following steps:
(1) The pretreatment process is normal in material preparation, and 20kg of phospholipid (soybean phospholipid) and 10kg of soybean oil are dissolved in water bath at 70 ℃, added into a mixture of other oil raw materials, mixed uniformly and added into the feed liquid.
(2) The feed liquid is homogenized at first stage and second stage at 100bar and 30bar respectively.
(3) Adjusting the temperature of the feed liquid in the pre-concentrator to 50 ℃, and performing primary concentration, secondary concentration and tertiary concentration, wherein during tertiary concentration, the feed liquid is conveyed into a vacuum concentrator and is concentrated in vacuum until the volume of the feed liquid is 1/4 of that of the raw material liquid, and the milk dry matter is 47wt%, so as to obtain concentrated feed liquid;
(4) And a carbon dioxide adding system is connected between the concentration cylinder and the spray drying spray gun at a material pipeline. The pressure reducing valve regulates the output pressure of carbon dioxide to be 10bar, and the feeding speed of the carbon dioxide is 5kg/h. And (3) conveying the concentrated feed liquid to a spray drying tower for drying, wherein the temperature of the feed liquid is 60 ℃, the air inlet temperature during spray drying is 190 ℃, the air exhaust temperature is 90 ℃, trapping the fine powder by using a cyclone separator, and returning the trapped fine powder to the top of the spray drying tower to obtain a milk powder product.
Example 2
This example provides a method for producing a rapidly defoaming milk formula, which contains 50kg soybean oil, 80kg high oleic sunflower oil, 1kg anhydrous butter and 20kg corn oil as oil ingredients, and the other ingredients are shown in table 1. The production method comprises the following steps:
(1) The pretreatment process section is normal in burdening, 2kg of phospholipid (soybean phospholipid) and 1kg of anhydrous cream are dissolved in water bath at 65 ℃, mixed uniformly, added into the mixture of other oil raw materials, mixed uniformly and added into the feed liquid.
(2) The feed liquid is homogenized at the first stage of 110bar and at the second stage of 35bar.
(3) Adjusting the temperature of the feed liquid in the pre-concentrator to 40 ℃, and performing primary concentration, secondary concentration and tertiary concentration, wherein during tertiary concentration, the feed liquid is conveyed into a vacuum concentrator and is concentrated in vacuum until the volume of the feed liquid is 1/4 of that of the raw material liquid, and the milk dry matter is 50wt%, so as to obtain the concentrated feed liquid;
(4) And a carbon dioxide adding system is connected between the concentration cylinder and the spray drying spray gun at a material pipeline. The pressure reducing valve regulates the output pressure of carbon dioxide to be 5bar, and the feeding speed of the carbon dioxide is 0.2kg/h. And (3) conveying the concentrated feed liquid to a spray drying tower for drying, wherein the feed liquid temperature is 65 ℃, the air inlet temperature during spray drying is 180 ℃, the air exhaust temperature is 80 ℃, trapping the fine powder by using a cyclone separator, and returning the trapped fine powder to the top of the spray drying tower to obtain a milk powder product.
Example 3
This example provides a method for producing a fast defoaming formula milk powder, the oil raw materials of the formula milk powder include 45kg soybean oil, 80kg high oleic sunflower oil, 1kg anhydrous butter and 25kg corn oil, and the other raw materials are shown in table 1. The production method comprises the following steps:
(1) The pretreatment process is normal, 10kg of phospholipid (soybean phospholipid) and 5kg of corn oil are dissolved in a water bath at 65 ℃, added into a mixture of other oil raw materials, mixed uniformly and added into feed liquid.
(2) The feed liquid is homogenized at the first stage of 110bar and at the second stage of 35bar.
(3) Adjusting the temperature of the feed liquid in the pre-concentrator to 40 ℃, and performing primary concentration, secondary concentration and tertiary concentration, wherein during tertiary concentration, the feed liquid is conveyed into a vacuum concentrator and is concentrated in vacuum until the volume of the feed liquid is 1/4 of that of the raw material liquid, and the milk dry matter is 50wt%, so as to obtain the concentrated feed liquid;
(4) And a carbon dioxide adding system is connected between the concentration cylinder and the spray drying spray gun at a material pipeline. The pressure reducing valve regulates the carbon dioxide output pressure to be 20bar, and the feeding speed of the carbon dioxide is 2kg/h. And (3) conveying the concentrated feed liquid to a spray drying tower for drying, wherein the feed liquid temperature is 65 ℃, the air inlet temperature during spray drying is 180 ℃, the air exhaust temperature is 80 ℃, trapping the fine powder by using a cyclone separator, and returning the trapped fine powder to the top of the spray drying tower to obtain a milk powder product.
Example 4
This example provides a method for producing a fast defoaming formula milk powder, the oil raw materials of the formula milk powder include 45kg corn oil, 80kg high oleic sunflower oil, 2kg anhydrous butter and 25kg soybean oil, and the other raw materials are shown in table 1. The production method comprises the following steps:
(1) The pretreatment process section is normal in batching, 10kg of phospholipid (soybean phospholipid), 2kg of anhydrous cream and 3kg of soybean oil are dissolved in water bath at 65 ℃, added into the mixture of other oil raw materials, mixed uniformly and added into the feed liquid.
(2) The feed liquid is homogenized at the first stage of 110bar and at the second stage of 35bar.
(3) Adjusting the temperature of the feed liquid in the pre-concentrator to 40 ℃, and performing primary concentration, secondary concentration and tertiary concentration, wherein during tertiary concentration, the feed liquid is conveyed into a vacuum concentrator and is concentrated in vacuum until the volume of the feed liquid is 1/4 of that of the raw material liquid, and the milk dry matter is 50wt%, so as to obtain the concentrated feed liquid;
(4) Between the concentration cylinder and the spray drying spray gun, a nitrogen adding system is connected to the material pipeline. The pressure reducing valve regulates the nitrogen output pressure to 10bar, and the nitrogen feeding speed is 2kg/h. And (3) conveying the concentrated feed liquid to a spray drying tower for drying, wherein the feed liquid temperature is 65 ℃, the air inlet temperature during spray drying is 180 ℃, the air exhaust temperature is 80 ℃, trapping the fine powder by using a cyclone separator, and returning the trapped fine powder to the top of the spray drying tower to obtain a milk powder product.
EXAMPLE 5 testing of the Condition of milk bottle reconstitution
The influence of different air inlet speeds on the defoaming effect is tested:
sample trial production is carried out according to example 2 and example 3, trial production powder is collected, and the normal production milk powder and 0.2kg/h CO are respectively introduced 2 Milk powder produced (example 2) and 2kg/h CO 2 The milk powder of the group (example 3) was reconstituted and the distance from the milk-foam contact surface to the upper layer of the foam was measured and averaged over the four groups. According to the brewing result, the normally produced milk powder contains a large amount of foam, is not easy to break, and still contains a large amount of small foam after standing for half an hour. After 30 seconds of standing, 2kg/h CO 2 The bubbles burst rapidly, 0.2kg/h CO 2 The group broke slightly slower, but the rate of rupture was much faster than the normal control group. After 30 minutes of standing, the control group still had a large amount of air bubbles and did not crack. The distance from the contact surface of the milk and the foam to the upper layer of the foam is measured, and the average value of the four groups of values is taken. The control group still had 42mm bubbles and was small bubbles that did not break easily. 0.2kg/h CO 2 The group had 14mm small bubbles, and the bubbles were not easily broken even after a long time. 2kg/h CO 2 The group only has small bubbles of about 2mm around the milk, and no bubbles appear in other places, so that the requirement of quickly eliminating the bubbles can be met. Milk powderThe foam height after reconstitution is shown in Table 2 and FIGS. 1 to 3, where FIG. 1 is the initial bubble height, FIG. 2 is the bubble height after 30 seconds of standing, and FIG. 3 is the bubble height after 30 minutes of standing.
TABLE 2
As can be seen from the data in Table 2, control/0.2 kg CO 2 The initial height ratio of the set was 2.28, after 30 seconds the ratio became 2.61 and after 30 minutes the ratio became 3. As can be seen, 0.2kg of CO 2 The group bubbles are broken at a faster rate, and although the lower limit of the air inlet speed, the effect is still good, and the defoaming effect is very obvious. If the air inlet speed in the preparation process is increased, the defoaming effect is better.
The formulation of the normal control group was identical to the formulation of the examples and was prepared as follows:
(1) The materials are normally mixed in the pretreatment section, are uniformly mixed for 30 minutes and then enter a temporary storage tank.
(2) The feed liquid is homogenized at 120bar in the first stage and at 32bar in the second stage.
(3) Adjusting the temperature of the feed liquid in the pre-concentrator to 40 ℃, and performing primary concentration, secondary concentration and tertiary concentration, wherein during tertiary concentration, the feed liquid is conveyed into a vacuum concentrator and is concentrated in vacuum until the feed liquid is 1/4 of the volume of the raw material liquid and the milk dry matter is 49wt%, so as to obtain the concentrated feed liquid;
(4) Conveying the concentrated feed liquid to a spray drying tower for drying, wherein the feed liquid temperature is 65 ℃, the air inlet temperature during spray drying is 180 ℃, the air exhaust temperature is 80 ℃, the temperature of the liquid entering the spray drying is 60 ℃, trapping fine powder by using a cyclone separator, and simultaneously returning the trapped fine powder to the top of the spray drying tower;
(5) Secondarily drying and cooling the powder discharged from the drying tower by a fluidized bed; heating lecithin and anhydrous cream to about 60 ℃, pouring into a spraying cylinder, and uniformly spraying on the surface of powder between a static fluidized bed and a dynamic fluidized bed under the action of compressed air to obtain a milk powder product.
The effect of different gases on the defoaming effect was tested:
respectively carrying out trial production on example 3 and example 4, collecting trial production powder, and introducing 2kg/h N into normal milk powder 2 Milk powder produced (example 4) and 2kg/h CO 2 The produced milk powder (example 3) was reconstituted and the distance from the milk and foam contact surface to the upper layer of the foam was measured and averaged over four sets of values. The control milk contained a large amount of small foam and was not easily broken. After 30 minutes of standing, the height of the bubbles in the control group is still 35mm, and the reduction amplitude is small. 2kg/h CO 2 The milk composition has more initial bubbles and larger bubbles, and after standing for 30 seconds, the content of CO is 2kg/h 2 The air bubbles burst rapidly and after 30 minutes of standing, only about 2mm of small air bubbles remained around the baby bottle. No bubbles appear in other places, and the requirement of quickly eliminating the bubbles can be met. And 2kg/h N 2 The group had a slightly higher initial bubble height and collapsed more quickly, but formed substantially smaller bubbles that collapsed much faster than the control group. The initial bubble height is only 25mm, rapidly drops to 9mm after 30 seconds, and after half an hour, only 3mm small bubbles do not affect the body of the infant at all. The foam height after reconstitution of the milk powder is shown in Table 3 and FIGS. 4-6, where FIG. 4 is the initial bubble height, FIG. 5 is the bubble height after 30 seconds of standing, and FIG. 6 is the bubble height after 30 minutes of standing.
TABLE 3
The bubble height in the normal control group is obviously higher than that in the other two groups, namely 2kg/h N 2 The group is 1 time higher than that of the CO 2kg/h 2 The group was 1.5 times higher. After 30 seconds, the control group had 2kg/h N bubbles, respectively 2 Group sum 2kg/h CO 2 5 and 4 times of groups. Standing for 30min, and adding 2kg/h N 2 Group sum 2kg/h CO 2 The group was nearly free of bubbles, while the control group still contained a large number of bubbles. This shows that the self-defoaming energy of the milk powder after the process of the invention is adoptedThe force is obviously improved.
Claims (11)
1. A method for producing infant formula milk powder capable of quickly defoaming comprises the steps of dissolving phospholipid in oil raw materials, then dispersing the oil raw materials in milk powder liquid through homogenization, and introducing compressed gas before spray drying;
wherein the compressed gas is carbon dioxide or nitrogen;
the flow rate of the compressed gas is 0.2-5kg/h;
the production method comprises concentrating the homogenized feed liquid to make the dry matter content of the feed liquid reach 43-53%.
2. The method of claim 1, wherein the phospholipids are added in an amount of 2-20 kg/ton based on the total weight of the infant formula.
3. The production method according to claim 1, wherein the compressed gas is added after the concentration of the feed liquid and before the spray drying.
4. A production method according to any one of claims 1 to 3, comprising the steps of:
metering and storing the powder raw materials;
measuring nutrients, dissolving with water, and storing;
metering, melting and storing the oil raw materials; wherein, the phospholipid and the oil raw material are melted together;
pumping pure water into a wet mixing tank, and heating;
when the temperature, the liquid level and the vacuum degree of the vacuum mixing tank reach set values, sucking the powder raw materials, the oil raw materials and the phospholipid into the vacuum mixing tank, adding nutrients from the wet mixing tank, and circulating the materials between the vacuum mixing tank and the wet mixing tank; after the material mixing is finished, emptying the material liquid from the vacuum material mixing tank to a wet material mixing tank;
homogenizing the feed liquid, and concentrating the homogenized feed liquid to make the dry matter content of the feed liquid reach 43-53%;
injecting compressed gas into the concentrated feed liquid;
and (4) carrying out spray drying on the feed liquid injected with the compressed gas to obtain the milk powder.
5. The production method according to claim 1, wherein the homogenization pressure is 110-150bar.
6. The production method according to claim 1, wherein the compressed gas is carbon dioxide.
7. The production process according to any one of claims 1 or 6, wherein the pressure of the compressed gas is 5 to 20bar.
8. The production method according to claim 1, wherein the inlet air temperature during spray drying is 160-190 ℃, the outlet air temperature is 70-90 ℃, and the temperature of the feed liquid entering the spray drying is 40-60 ℃.
9. The production method according to claim 4, wherein the powder material comprises one or more of whole milk powder, skimmed milk powder, desalted whey powder D90, lactose, whey protein powder, soybean oil, peanut oil, galacto-oligosaccharide syrup and fructo-oligosaccharide powder;
the nutrient comprises one or more of L-ascorbic acid, taurine, lactose, dl-alpha-tocopherol acetate, retinyl acetate, nicotinamide, cholecalciferol, D-calcium pantothenate, plant menadione, lutein, thiamine nitrate, pyridoxine hydrochloride, riboflavin, folic acid, D-biotin, cyanocobalamine, ferrous sulfate, zinc sulfate, copper sulfate, sodium selenite, manganese sulfate, potassium iodide, potassium chloride, magnesium chloride and choline chloride;
the oil raw material comprises one or more of peanut oil, high oleic acid sunflower oil, palm oil, coconut oil, anhydrous cream and walnut oil.
10. The production method according to claim 4, wherein the phospholipid is melted together with anhydrous cream.
11. The production method according to claim 1, wherein the concentration is performed by a triple effect evaporation process.
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| CN110810525B (en) * | 2019-11-29 | 2021-08-20 | 内蒙古伊利实业集团股份有限公司 | Method for preparing milk powder and milk powder prepared by same |
| CN110810527B (en) * | 2019-11-29 | 2021-11-26 | 内蒙古伊利实业集团股份有限公司 | Method for preparing milk powder and milk powder product prepared by same |
| CN110810524B (en) * | 2019-11-29 | 2021-08-06 | 内蒙古伊利实业集团股份有限公司 | Method for preparing milk powder and obtained milk powder |
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