CN113331256A - Formula sheep milk powder capable of promoting sleep and preparation method thereof - Google Patents

Abstract

The invention discloses a formula sheep milk powder for promoting sleep and a preparation method thereof, and relates to the technical field of formula sheep milk powder. According to the invention, the tea theanine is added into the formula milk powder, and the formula milk capable of being used by children over 3 years old is formed through the reasonable compatibility of substances such as milk mineral salt, collagen peptide and taurine, so that the height problem of the children caused by the sleep quality is solved.

Description

Formula sheep milk powder capable of promoting sleep and preparation method thereof

Technical Field

The invention relates to the technical field of formula sheep milk powder, and particularly relates to formula sheep milk powder for promoting sleep and a preparation method thereof.

Background

It is well known that the effect of sleep on the growth and development of children is enormous. A number of specialist documents have shown that sleep is poor and the most direct effect is that children are height limited. Therefore, it is necessary to pay attention to the height development problem of children who have height problems due to sleeping quality.

The theanine extracted from tea can inhibit brain nerve cell hyperexcitation, shorten sleep time, help fall asleep, reduce dreaminess, and has tranquilizing effect; can also increase dopamine neurotransmitter in brain, and improve memory. In order to solve the problem of sleep quality, tea theanine is added into milk powder. For example, the patent application with publication number CN107771945A and the patent name of a formula milk powder for improving the sleep quality of middle-aged and elderly people and a manufacturing method thereof discloses a formula milk powder for improving the sleep quality of middle-aged and elderly people, wherein the formula comprises the following basic components in percentage by weight, the sum of one or more of cow/sheep milk, whole cow/sheep milk powder, skimmed milk powder, desalted whey powder, whey protein powder and lactose is more than or equal to 70%, lactalbumin is 0.3-3%, theanine is 0.1-1.0, casein hydrolysate peptide is 0.05-0.5, and a spina date seed extract is 0.1-1, and the patent application describes that: lactalbumin helps to relieve stress and improve sleep, improving abstract visual memory. Clinical studies show that alpha-la in lactalbumin contains a large amount of tryptophan, the tryptophan is a precursor of 5-hydroxytryptamine in the brain, and the 5-hydroxytryptamine has the capability of helping a human body to relieve pressure, so that the alpha-la can improve the sleep of people suffering from malnutrition. A large amount of theanine is naturally present in green tea. Theanine is a unique free form amino acid, the active amino acid of which is L-theanine. L-theanine is a relaxant, and can promote mood relaxation and help healthy sleep. Theanine can inhibit nerve cell death caused by transient cerebral ischemia, protect nerve cell, reduce MDA content, reduce lipid peroxidation, promote central cholinergic system function, and improve memory and delay aging.

However, in this patent application, it is also explicitly described that: the product is not suitable for infants, and the theanine is not added into the milk powder for children except the milk powder special for the old and the milk powder for children at present, so the reason is that the formula compatibility effect suitable for the old cannot be directly used for children. Therefore, it is necessary to develop a new model for helping sleep and height growth for children who have height problems due to sleep quality.

Disclosure of Invention

The invention aims to provide a formula sheep milk powder for promoting sleep, which is added with theanine and forms formula milk available for children over 3 years old through reasonable compatibility of substances such as milk mineral salt, collagen peptide, taurine and the like so as to solve the height problem of the children caused by sleep quality.

In addition, the invention also provides a preparation method of the formula sheep milk powder for promoting sleep, the sheep milk powder is processed by adopting a dry-wet method composite process, the food nutrition enhancer in the formula is added by adopting a wet method and a dry method according to the characteristics of raw materials, and the components are uniformly distributed while the product functionality is ensured.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: the formula sheep milk powder comprises raw sheep milk, desalted whey powder, full-fat sheep milk powder, isomaltooligosaccharide, concentrated whey protein powder, mixed vegetable oil, milk mineral salt, collagen peptide, tea theanine, potassium hydroxide and a compound nutrition enhancer, wherein the compound nutrition enhancer comprises taurine, L-ascorbic acid, dl-alpha-tocopheryl acetate, pyridoxine hydrochloride, retinyl acetate, cholecalciferol, folic acid, calcium carbonate, ferrous sulfate, zinc sulfate, sodium selenite and lactose.

Preferably, the mixed vegetable oil is prepared by mixing corn oil, low erucic acid rapeseed oil, coconut oil and high oleic acid sunflower seed oil.

Preferably, the formula goat milk is composed of 998Kg of base powder prepared by a wet method and 2Kg of dry formula powder calculated by 1 ton of finished formula milk, and the addition amount of each component for preparing the base powder is as follows calculated by 1 ton of base powder prepared by the wet method: 400Kg of raw sheep milk, 400Kg of desalted whey powder, 300Kg of full-fat sheep milk powder, 100Kg of isomaltose hypgather, 75Kg of concentrated whey protein powder with the content of 34 percent, 25Kg of mixed vegetable oil, 1Kg of potassium hydroxide and 11.5Kg of compound nutrition enhancer; the dry method formula powder comprises 1Kg of milk mineral salt, 0.5Kg of collagen peptide and 0.5Kg of theanine of tea.

Further, the compound nutrition enhancer consists of the following components: 2.5Kg of compound vitamin, 1Kg of compound mineral substance and 8Kg of compound calcium carbonate.

Preferably, the compound vitamin consists of the following components: 320g of taurine, 950g of L-ascorbic acid, 447g of dl-alpha-tocopherol acetate, 280g of pyridoxine hydrochloride, 66.6g of retinyl acetate, 40g of cholecalciferol, 35g of folic acid and 361.4g of lactose.

Preferably, the compound mineral consists of the following components: 355.9g of ferrous sulfate, 165.7g of zinc sulfate, 71.1g of sodium selenite and 407.3g of lactose.

Preferably, the compound calcium carbonate consists of the following components: 7999g of calcium carbonate, 0.5g of L-ascorbic acid and 0.5g of lactose.

The preparation method of the formula sheep milk powder for promoting sleep comprises the following steps:

(1) and (3) filtering and removing impurities: measuring and filtering raw sheep milk qualified by acceptance, and removing mechanical impurities in fresh milk;

(2) and (3) cold storage: cooling the filtered raw sheep milk and refrigerating for later use;

(3) cleaning milk: cleaning raw sheep milk, removing impurities in the sheep milk, and ensuring that the impurity degree is less than or equal to 2.0 mg/kg;

(4) and (3) sterilization: sterilizing the raw sheep milk after milk purification, and then storing;

(5) standardizing ingredients: mixing the stored raw sheep milk with desalted whey powder, full-fat sheep milk powder, isomaltose hypgather, concentrated whey protein powder, mixed vegetable oil, compound nutrition enhancer and potassium hydroxide according to the proportion, and carrying out standardized burdening and dissolving at 50-60 ℃ to obtain feed liquid;

(6) homogenizing: homogenizing the feed liquid in a high-pressure homogenizer at a temperature not higher than 60 deg.C under a homogenizing pressure of 10-14Mpa to break fat particles in the feed liquid into smaller fat balls, and uniformly dispersing in milk;

(7) concentration and evaporation and high-temperature sterilization: concentrating and evaporating the emulsion to remove water to form concentrated milk; and sterilizing the concentrated milk at high temperature;

(8) spray drying: pumping the concentrated milk into a sterile milk storage tank through a discharge pump, filtering the concentrated milk by using a filter screen before pumping the concentrated milk into the milk storage tank, and pumping the concentrated milk into a drying tower by using a high-pressure pump for spray drying; wherein: the air inlet temperature during spray drying is 170-185 ℃, the air exhaust temperature is 80-92 ℃, the negative pressure in the tower is-20-35 water column mmH 2O, and the temperature in the tower is 60-92 ℃;

(9) cooling: cooling the dried concentrated milk by a fluidized bed to obtain wet milk powder, and then introducing the wet milk powder into a dry mixing room by a closed conveying system;

(10) dry mixing: according to the proportion, adding milk mineral salt, collagen peptide and tea theanine into the dry mixing chamber after tunnel sterilization;

(11) metering and mixing: mixing the sterilized milk mineral salt, collagen peptide and tea theanine with dried milk powder according to a ratio;

(12) and (3) detecting trace metal elements: detecting trace metal elements of the mixed milk powder;

(13) packaging and warehousing: sieving the qualified milk powder, and then performing film-covering nitrogen-filling packaging, external packaging, code spraying, boxing and warehousing according to the required specification; the nitrogen is filled for packaging, the nitrogen pressure is more than or equal to 0.5MPa, and the residual oxygen is less than or equal to 3.0 percent; the transverse sealing temperature of the adult formula milk powder is 175-185 ℃, and the longitudinal sealing temperature is 160-180 ℃.

Compared with the prior art, the invention has the following beneficial effects:

(1) according to the invention, the tea theanine is added into the formula milk powder, and the formula milk capable of being used by children over 3 years old is formed through the reasonable compatibility of substances such as milk mineral salt, collagen peptide and taurine, so that the height problem of the children caused by the sleep quality is solved.

(2) The invention is beneficial to the absorption of various nutrients such as lactoferrin, AA, DHA and the like by children by reasonably adjusting the composition of protein, fat and carbohydrate, and meets the basic requirements of body health: the raw sheep milk, the desalted whey powder, the whole goat milk powder and the concentrated whey protein powder are added to supplement all protein, partial fat, carbohydrate, vitamins and mineral substances, so that the protein content in the product reaches 19.0g/100 g; the fat content in the product reaches 15.0g/100g by adding mixed vegetable oil (corn oil, low erucic acid rapeseed oil, coconut oil and high oleic acid sunflower oil) mainly used for supplementing fat and adjusting fatty acid composition, which is beneficial to the absorption of collagen peptide; the isomaltose hypgather is mainly used for supplementing carbohydrate and is a main source substance of dietary fiber, and the carbohydrate content in the product is 52.8g/100g, wherein the dietary fiber content is 4.2g/100 g.

(3) The compound nutrient supplement added in the invention is prepared from compound vitamins, compound minerals and compound calcium carbonate; the vitamins are essential nutrients for regulating various metabolism of human body and maintaining life and health of organism, in which taurine has multiple functions of visual development, nerve development, detoxification, calcium flow regulation, bile acid combination, osmotic pressure regulation, cell membrane stabilization and the like, especially for infant period, taurine can obviously promote abrupt differentiation and cell proliferation of human brain nerve cells, the capacity of the taurine for enriching brain is far higher than that of adults, the taurine also plays an important role in visual system development and accounts for 50% of total amount of amino acids in retina, the taurine is an important nutritional factor for photoreceptor development, the taurine also has a protective effect on immune cells, the content of the taurine accounts for 50% of all free amino acids in lymphocytes, the taurine can influence lipid metabolism, and simultaneously has a regulating effect on endocrine system, and the taurine can influence carbohydrate metabolism, can also promote the absorption of various nutrients by the intestinal tract and increase the stability of the erythrocyte membrane. The mineral is an indispensable nutrient element in human tissues and can meet the requirements of human growth and development; meanwhile, the L-ascorbic acid (vitamin C) also participates in the preparation of the compound calcium carbonate, so that the biological activity of calcium is ensured, and the absorption of substances is facilitated; due to the compatibility of different components, the grouped component absorption in the invention is maximized, and the due effect of each component is realized.

Detailed Description

Example 1

The embodiment provides a formula sheep milk powder for promoting sleep, which is calculated by 1 ton of formula milk finished product, the formula goat milk powder consists of 998Kg of base powder prepared by a wet method and 2Kg of dry formula powder, and the addition amount of each component for preparing the base powder is as follows by 1 ton of base powder prepared by the wet method: 400Kg of raw sheep milk, 400Kg of desalted whey powder, 300Kg of full-fat sheep milk powder, 100Kg of isomaltose hypgather, 75Kg of concentrated whey protein powder with the content of 34 percent, 25Kg of mixed vegetable oil (prepared by mixing corn oil, low erucic acid rapeseed oil, coconut oil and high oleic acid sunflower seed oil in the mass ratio of 1: 1), 1Kg of potassium hydroxide and 11.5Kg of compound nutrition enhancer; the dry method formula powder comprises 1Kg of milk mineral salt, 0.5Kg of collagen peptide and 0.5Kg of theanine of tea. The compound nutrient enhancer consists of the following components: 2.5Kg of compound vitamin, 1Kg of compound mineral substance and 8Kg of compound calcium carbonate. The compound vitamin comprises the following components: 320g of taurine, 950g of L-ascorbic acid, 447g of dl-alpha-tocopherol acetate, 280g of pyridoxine hydrochloride, 66.6g of retinyl acetate, 40g of cholecalciferol, 35g of folic acid and 361.4g of lactose. The compound mineral comprises the following components: 355.9g of ferrous sulfate, 165.7g of zinc sulfate, 71.1g of sodium selenite and 407.3g of lactose. The compound calcium carbonate consists of the following components: 7999g of calcium carbonate, 0.5g of L-ascorbic acid and 0.5g of lactose.

The embodiment also provides a preparation process of the milk powder, which comprises the following steps:

acceptance of raw sheep milk

The method comprises the steps of purchasing from a specified qualified milk station, monitoring by a stationer for milking and refrigerating, then transporting back to a company, carrying out batch-by-batch sampling inspection by a raw sheep milk inspector after entering a factory according to standards, executing detection items and results according to GB19301-2010 raw milk standard, and inspecting and accepting only when the raw sheep milk is qualified (each factory can also customize respective further inspection and acceptance standards on the basis of the standards and requires that only the raw sheep milk meets two standards simultaneously).

Second, filtration

And (3) filtering the raw sheep milk qualified by acceptance through a 80-mesh or 120-mesh nylon filter screen after metering, and removing mechanical impurities in the fresh milk.

Cold storage

Cooling the filtered raw sheep milk by a plate heat exchanger and storing the cooled raw sheep milk in a refrigeration tank for later use; the temperature is controlled at 0-4 deg.C and the acidity is controlled at 6-130T during storage, and the temperature and acidity are checked periodically to determine whether they meet the requirements.

Fourth, cleaning milk

The raw sheep milk is cleaned by a separator, impurities in the raw sheep milk are removed, slag is discharged in time according to the impurity condition after the milk is cleaned, and the impurity degree is required to be less than or equal to 2.0 mg/kg.

Fifth, sterilizing and storing

The raw sheep milk is pre-sterilized by a plate type sterilization machine, enters a degassing tank, is treated by a spore separator and returns to the plate type sterilization machine to kill part of microorganisms in the fresh milk. In the embodiment, when the adopted sterilization machine is a 25-ton sterilization machine, the temperature is 80-85 ℃, and the sterilization time is 15 s; when the adopted sterilization machine is a 30-ton sterilization machine, the temperature is 90-110 ℃, and the sterilization time is 4 s. And (4) after sterilization, storing the raw sheep milk.

Sixthly, standardized ingredients (from here on, the preparation of the goat milk powder)

Adding auxiliary materials into the stored raw sheep milk according to the formula, and carrying out standardized material mixing and dissolving at 50-60 ℃ to obtain feed liquid. The auxiliary materials described in this embodiment, namely the desalted whey powder, the full-fat goat milk powder, the isomaltooligosaccharide, the concentrated whey protein powder, the mixed vegetable oil, the compound nutrition enhancer and the potassium hydroxide, comprise the steps of weighing, preheating, dissolving (35-45 ℃), metering and the like.

Seven, homogenizing

Homogenizing the feed liquid at a temperature not higher than 60 deg.C in a high-pressure homogenizer under a homogenizing pressure of 10-14Mpa, pulverizing fat particles into smaller fat balls, and uniformly dispersing in the emulsion.

Eighth, concentration and evaporation

And sterilizing the emulsion again by a sterilizer through a falling film evaporation system, concentrating and evaporating by a separator to remove water to form concentrated milk, wherein the discharge density after concentration is 1.090-1.155.

High temperature sterilization

The concentrated milk is sterilized by the plate heat exchanger, so that most of bacteria in the feed liquid are killed. In this embodiment, the high-temperature sterilization mainly has two modes: the method is characterized in that the high-temperature sterilization of the south China and the VTIS (tetra-basic ethylene glycol-vinyl acetate copolymer) is realized, a VTIS sterilization mode is usually adopted, and the south China equipment is adopted for sterilization when VTIS sterilization equipment fails or small-batch production (1-3 tons) is carried out. Specifically, the plate heat exchanger is of a Nanhua brand, the used high-temperature sterilization is 89-96 ℃, and the sterilization time is 10 s; or the plate heat exchanger brand is VTIS, the used high-temperature sterilization is performed at the temperature of 110-120 ℃, and the sterilization time is 0.33 s.

Ten, spray drying

Pumping the concentrated milk into a sterile milk storage tank through a discharge pump, filtering the concentrated milk by using a filter screen before pumping the concentrated milk into the milk storage tank, and pumping the concentrated milk into a drying tower by using a high-pressure pump for spray drying. In the embodiment, the air inlet temperature during spray drying is 170-185 ℃, the air outlet temperature is 80-92 ℃, the negative pressure in the tower is-20-35 water column mmH 2O, and the temperature in the tower is 60-92 ℃.

Eleven, fluidized bed cooling and temporary storage

And (3) sequentially cooling the dried concentrated milk for three times by a fluidized bed to obtain milk powder, and then temporarily storing the milk powder in a closed conveying system (or carrying out large packaging on 25KG perilla formula goat milk powder base powder). The air inlet temperature of the tertiary cooling is 15-35 ℃.

Twelve, tunnel sterilization

According to the proportion, milk mineral salt, collagen peptide and tea theanine are added into the dry mixing room after tunnel sterilization.

Thirteen, metering and mixing

Mixing the weighed milk mineral salt, collagen peptide and tea theanine with the milk powder produced in the previous step.

Fourteen, trace metal element detection

And a metal detector is installed on the formula milk powder production line, and trace metal element detection is carried out on the mixed milk powder. In this embodiment, the metal detector is calibrated by sequentially using 1.0mm iron balls, 1.2mm non-iron balls and 1.5mm stainless steel balls before use, so as to ensure accurate detection results.

Fifteen, nitrogen-filled package

Sieving the qualified milk powder through a vibrating screen, then conveying to a quantitative packaging machine, and performing film-covering nitrogen-filling packaging and sealing according to the required specification. The parameters of the film-covered nitrogen-filled package in the embodiment are as follows:

the nitrogen pressure is more than or equal to 0.5MPa, and the residual oxygen content is less than or equal to 3.0 percent;

the transverse sealing temperature of the adult formula milk powder is 175-185 ℃, and the longitudinal sealing temperature is 160-180 ℃.

Sixthly, external package

Canning or boxing according to the product variety requirement, sealing, spraying code, and finally boxing.

Seventeen, warehousing

And stacking the packaged finished products in a finished product warehouse according to the requirement for storage, wherein the products must be stacked on a tray and keep a certain distance from the wall surface, and stacking the products respectively according to the production date/batch number and the variety/specification to make marks. Keeping the warehouse clean and sanitary, cool, dry and ventilated, and keeping the rat-proof, dust-proof, damp-proof and fireproof facilities intact.

Eighteen, inspecting and leaving factory

And (4) inspecting the milk powder put in storage, wherein an inspection qualified report can be issued when the milk powder is qualified, and then the milk powder leaves the factory, and the milk powder returns for additional treatment when the milk powder is not qualified.

Comparative example

Providing the formula and the production process provided according to the embodiment 1, canceling one additive, and producing the control group milk powder, wherein the formula comprises the following specific steps: the tea theanine is not added, and the control group milk powder A is prepared; preparing control group milk powder B without adding collagen peptide; preparing a control group milk powder C without adding milk mineral salt; preparing control group milk powder D without adding mixed vegetable oil; preparing milk powder E of a control group without adding taurine; calcium carbonate was added directly without compounding to prepare control group milk powder F.

Control test

35 mice of 8 weeks old, each weighing 35g, were divided into 7 groups and fed with the milk powder prepared in example 1 and comparative example, and the weight of each group was weighed after 2 weeks, and the average weight of each group was as follows:

mouse group number	Milk powder combined number	Average time of daily sleep of mice	Average mouse body weight (g) after two weeks of feeding
				1	Example 1	16.4	61
2	Control group milk powder A	13.5	53
				3	Comparison group milk powder B	15.9	51
4	Control group milk powder C	16.9	58
				5	Control group milk powder D	15.7	43
6	Control group milk powder E	15.2	57
				7	Control group milk powder F	16.1	58

The above-mentioned embodiment is only one of the preferred embodiments of the present invention, and should not be used to limit the scope of the present invention, but all the insubstantial modifications or changes made within the spirit and scope of the main design of the present invention, which still solve the technical problems consistent with the present invention, should be included in the scope of the present invention.

Claims (8)

1. The formula sheep milk powder for promoting sleep is characterized by comprising raw sheep milk, desalted whey powder, full-fat sheep milk powder, isomaltooligosaccharide, concentrated whey protein powder, mixed vegetable oil, milk mineral salt, collagen peptide, tea theanine, potassium hydroxide and a compound nutrition enhancer, wherein the compound nutrition enhancer is composed of taurine, L-ascorbic acid, dl-alpha-tocopheryl acetate, pyridoxine hydrochloride, retinyl acetate, cholecalciferol, folic acid, calcium carbonate, ferrous sulfate, zinc sulfate, sodium selenite and lactose.

2. The sleep-enhancing formulated sheep milk powder of claim 1 wherein the blended vegetable oil is a blend of corn oil, canola oil, coconut oil, and high oleic sunflower oil.

3. The sleep-promoting formulated sheep milk powder according to claim 1, wherein the formulated goat milk comprises 998Kg of wet-processed base powder and 2Kg of dry-processed formula powder, calculated on 1 ton of finished formulated goat milk, and the addition amount of each component for preparing the base powder is as follows, calculated on 1 ton of wet-processed base powder: 400Kg of raw sheep milk, 400Kg of desalted whey powder, 300Kg of full-fat sheep milk powder, 100Kg of isomaltose hypgather, 75Kg of concentrated whey protein powder with the content of 34 percent, 25Kg of mixed vegetable oil, 1Kg of potassium hydroxide and 11.5Kg of compound nutrition enhancer; the dry method formula powder comprises 1Kg of milk mineral salt, 0.5Kg of collagen peptide and 0.5Kg of theanine of tea.

4. The sleep-promoting formulated sheep milk powder of claim 3, wherein the compounded nutrient supplement is composed of the following components: 2.5Kg of compound vitamin, 1Kg of compound mineral substance and 8Kg of compound calcium carbonate.

5. The sleep-promoting formulated sheep milk powder of claim 4, wherein the vitamin formulation consists of: 320g of taurine, 950g of L-ascorbic acid, 447g of dl-alpha-tocopherol acetate, 280g of pyridoxine hydrochloride, 66.6g of retinyl acetate, 40g of cholecalciferol, 35g of folic acid and 361.4g of lactose.

6. The sleep-promoting formulated sheep milk powder of claim 4, wherein the formulated minerals consist of: 355.9g of ferrous sulfate, 165.7g of zinc sulfate, 71.1g of sodium selenite and 407.3g of lactose.

7. The sleep-promoting formulated sheep milk powder according to claim 4, wherein the formulated calcium carbonate consists of the following components: 7999g of calcium carbonate, 0.5g of L-ascorbic acid and 0.5g of lactose.

8. The preparation method of the sleep-promoting formulated sheep milk powder according to any one of claims 1 to 7, characterized by comprising the following steps:

(1) and (3) filtering and removing impurities: measuring and filtering raw sheep milk qualified by acceptance, and removing mechanical impurities in fresh milk;

(2) and (3) cold storage: cooling the filtered raw sheep milk and refrigerating for later use;

(3) cleaning milk: cleaning raw sheep milk, removing impurities in the sheep milk, and ensuring that the impurity degree is less than or equal to 2.0 mg/kg;

(4) and (3) sterilization: sterilizing the raw sheep milk after milk purification, and then storing;

(5) standardizing ingredients: mixing the stored raw sheep milk with desalted whey powder, full-fat sheep milk powder, isomaltose hypgather, concentrated whey protein powder, mixed vegetable oil, compound nutrition enhancer and potassium hydroxide according to the proportion, and carrying out standardized burdening and dissolving at 50-60 ℃ to obtain feed liquid;

(6) homogenizing: homogenizing the feed liquid in a high-pressure homogenizer at a temperature not higher than 60 deg.C under a homogenizing pressure of 10-14Mpa to break fat particles in the feed liquid into smaller fat balls, and uniformly dispersing in milk;

(7) concentration and evaporation and high-temperature sterilization: concentrating and evaporating the emulsion to remove water to form concentrated milk; and sterilizing the concentrated milk at high temperature;

(8) spray drying: pumping the concentrated milk into a sterile milk storage tank through a discharge pump, filtering the concentrated milk by using a filter screen before pumping the concentrated milk into the milk storage tank, and pumping the concentrated milk into a drying tower by using a high-pressure pump for spray drying; wherein: the air inlet temperature during spray drying is 170-185 ℃, the air exhaust temperature is 80-92 ℃, the negative pressure in the tower is-20-35 water column mmH 2O, and the temperature in the tower is 60-92 ℃;

(9) cooling: cooling the dried concentrated milk by a fluidized bed to obtain wet milk powder, and then introducing the wet milk powder into a dry mixing room by a closed conveying system;

(10) dry mixing: according to the proportion, adding milk mineral salt, collagen peptide and tea theanine into the dry mixing chamber after tunnel sterilization;

(11) metering and mixing: mixing the sterilized milk mineral salt, collagen peptide and tea theanine with dried milk powder according to a ratio;

(12) and (3) detecting trace metal elements: detecting trace metal elements of the mixed milk powder;

(13) packaging and warehousing: sieving the qualified milk powder, and then performing film-covering nitrogen-filling packaging, external packaging, code spraying, boxing and warehousing according to the required specification; the nitrogen is filled for packaging, the nitrogen pressure is more than or equal to 0.5MPa, and the residual oxygen is less than or equal to 3.0 percent; the transverse sealing temperature of the adult formula milk powder is 175-185 ℃, and the longitudinal sealing temperature is 160-180 ℃.