WO2017024574A1

WO2017024574A1 - Extraction of wheat aleurone layer content by pure physical dry method and production process and production line thereof

Info

Publication number: WO2017024574A1
Application number: PCT/CN2015/086822
Authority: WO
Inventors: 吴亮; 姚建森; 彭少然; 兰晓光
Original assignee: 山东知食坊食品科技有限公司
Priority date: 2015-08-13
Filing date: 2015-08-13
Publication date: 2017-02-16

Abstract

Disclosed are a production process and a production line for the extraction of wheat aleurone layer content by means of a pure physical dry method, comprising the following steps: feeding raw materials into a stock bin unit, stirring, storing, grinding and sieving, and separately measuring the packaging. The production process and the production line can effectively ensure the production efficiency, the flour yield, the quality of the aleurone layer content and the content of the pure aleurone layer by selecting and controlling the raw material particle size and water content, while satisfying the requirements of saving energy and environmental protection.

Description

Pure physical dry method for extracting wheat aleurone layer content, production process and production line thereof

Technical field

The present invention relates to a product containing cereals, and more particularly to a wheat aleurone content and a production process and production line thereof.

Background technique

The wheat aleurone content is present between the wheat seed coat and the endosperm, and the cells contain most of the substances that are important in nutrition and physiology, including dietary fiber, protein, minerals, and B. Vitamins, vitamin E, essential fatty acids, and specific protective substances such as biologically active substances. High levels of vitamins and minerals are generally good for health and are also beneficial for improving intellectual and physical productivity. Dietary fiber in the content of wheat aleurone layer helps to increase digestion activity. Specifically, they slow down the resorption process and thus maintain a feeling of fullness. Bioactive substances such as phenolic acids, flavonoids, lignans, β-glucans and the like in the contents of the wheat aleurone layer have a preventive effect on many diseases caused by human civilization such as arteriosclerosis and cancer.

From the nutritional point of view: the dietary fiber of wheat aleurone content can not only promote intestinal peristalsis, prevent constipation, reduce the contact time of harmful substances with the intestinal wall, reduce the risk of disease, but also reduce the absorption of fat in the digestive process. Thereby reducing blood cholesterol and triglycerides, preventing hypertension and cardiovascular and cerebrovascular diseases. The content of wheat aleurone layer is high in protein content, and it is a rich plant protein resource. It can not only make up for the deficiency of protein in the diet, but also reduce the intake of saturated fatty acids that are harmful to the body. It also contains various amino acids necessary for the body. Some very important features. The mineral content of wheat aleurone content accounts for more than 80% of wheat grain mineral content, and minerals are essential elements for human tissue and maintenance of normal physiological functions, and are one of the seven essential nutrients required by the human body. Phosphorus is the main mineral present in the contents of the wheat aleurone layer. It is an essential component of bone and muscle tissue, helping to maintain the body's acid-base balance, assist metabolism and energy production. Potassium is a mineral with a high content of wheat flour layer content. Its main role in the human body is to maintain acid-base balance, participate in energy metabolism and maintain normal function of nerves and muscles. This is followed by magnesium and calcium. Magnesium helps strengthen the body's bones and teeth, helps muscles relax and promotes muscle health. It is important to protect the heart and nervous system and is essential for energy production. Calcium is a nutrient that keeps your heart healthy, hemostasis, nerve health, muscle contraction, and skin, bone and teeth health. In addition, there is a large amount of iron and zinc. Iron is a component of hemoglobin; it is involved in the transport and exchange of oxygen and carbon dioxide; it is a constituent of enzymes and is also essential for energy production. Zinc is a component of more than 200 enzymes in the human body. It is an essential substance for growth and development, and it can promote the health of the nervous system and the brain, especially for the fetus at the development stage. B vitamins are essential for the human body; vitamin E Also known as anti-fertility vitamins or tocopherols, related to human reproductive function, is a nutrient to prevent infertility and human cell aging, but also anti-cancer; amino acids play an important role in children's growth and development; Bioactive substances and the like of the contents of the powder layer have a preventive effect on arteriosclerosis and certain cancers. It can be considered that the content of the wheat aleurone layer is a raw material having various physiological functions, rich in dietary fiber and high antioxidant active ingredient.

The contents of the wheat aleurone layer are obtained by physical separation (specifically, by mechanical/abrasive treatment) and biological enzymatic or ionization methods from the bran and further processing. The content of the aleurone layer is separated from the wheat bran, and the content of the wheat aleurone layer which is exquisite and rich in flavor can be directly produced without adding any other materials. The content of the wheat aleurone layer contains the bran inner content. Most of the nutrients present in agglomerated form are substances with potential health benefits.

In the prior art, the method for extracting the wheat aleurone layer from the wheat bran is generally carried out by a wet method, and the wheat bran is subjected to a moist treatment or a biochemical treatment, and the wheat aleurone layer is extracted from the wheat bran by a wet method. It involves problems such as dehydration and drying of wheat aleurone layer products, the process is complicated and the production cycle is long.

A method for extracting a layer of aleurone from bran in Chinese patent CN 100531594C. The stripping of the bran in this method is carried out by a combination of biochemical enzymatic, mechanical compaction or biochemical enzymatic combined with mechanical milling. The aleurone layer is then extracted by wet and dry separation. The wheat aleurone layer extraction method provides a separation method for wheat aleurone layer cells, and an extremely important part of the process flow is biochemical enzymatic treatment, and the biochemical enzymatic treatment is catalyzed for temperature, pH, enzyme concentration, and catalysis. The concentration of the substance is very high, so its process is complicated and the production cycle is long. There are many problems in the subsequent treatment of wheat aleurone layer by wet separation, such as dehydration, drying, dispersing and waste liquid treatment of wheat aleurone layer, and the nutrients in wheat aleurone layer may follow Fluid loss.

Chinese patent CN 1750761 describes an aleurone layer product and a preparation method thereof, which are as follows: a) preparing bran composed of an aleurone layer component and a non-adhesive layer component, in particular wheat bran; b) separating aleurone a layer component and a non-aleurone layer component, forming a mixture consisting of an aleurone layer component and a non-adhesive layer component; c) adjusting the humidity of the mixture to 10-20% water; d) using at least one pair of grinding The grinding and rolling equipment of the pair of rolls is finely ground, and the rolls are rotated at different surface speeds and pressed against each other. The solution needs to wet the bran, and the physical structure of the aleurone layer after grinding is damaged.

Chinese patent CN103229933 discloses a production method for extracting the contents of wheat aleurone layer which is simple and quick, without any additives, and can preserve the nutrient-rich and health-care function of the wheat aleurone layer; Control fails to give an effective technical solution, and humidity control is undoubtedly crucial to ensure production efficiency, flour yield and powder quality. The traditional method of controlling the humidity outside the silo has low efficiency and high energy consumption, especially causing dust pollution and steam pollution, which are urgent problems to be solved.

Summary of the invention

In view of the above problems existing in the prior art, the present invention aims to disclose a pure physical dry extraction of wheat aleurone layer content. The production process of the material, the production process improves the production process of the pure physical dry method for extracting the content of the wheat aleurone layer, and effectively guarantees the production efficiency, the flour yield, the quality and the pure paste of the contents of the wheat aleurone layer At the same time, the content of the powder layer meets the needs of energy conservation and environmental protection, and achieves higher economic and social benefits.

The technical solution of the present invention is implemented as follows:

A pure physical dry process for extracting the content of wheat aleurone layer content, comprising the following steps:

(1) Feed the raw materials into the silo unit, stir and store:

The raw material is wheat bran having a particle diameter of 2-4 mm, and the water content thereof is not less than 10%, and is not more than 15%;

The humidity of the silo is 40%-55%;

(2) feeding the raw materials in the silo unit into the grinding unit, and grinding the wheat bran into a mixture comprising the wheat aleurone layer component and the non-wheat aleurone layer component by means of collision, friction, rubbing and impact. among them,

The grinding unit comprises a driving device, a transmission device, a multi-stage cyclone eddy current grinding device and a discharging device, the driving device comprises an electric motor, the current of the electric motor is controlled by a feeding frequency converter, and the feeding frequency converter is installed externally In the control system; the motor current is 1.5-2.5A;

The wheat aleurone layer component has a particle size of 1.4-150 μm.

The non-wheat aleurone layer component has a particle size of 150-2000 μm;

(3) conveying the ground mixture to the receiving bin by using a high-pressure induced draft fan, the flow rate of the induced draft fan is 2200-5500 m ³ /h, and the total pressure is 4000-12000 Pa;

(4) The mixture in the receiving bin falls to the bottom and passes through the No. 2 discharge valve into the following receiving bin, which is then sucked into several cyclone receivers by the induced draft fan and sent to the sieve through several discharge valves. Screening and separation in a sub-unit, and obtaining a bran fine powder mainly comprising a wheat aleurone layer content and a main non-wheat aleurone layer component;

The content of the wheat aleurone layer is 28-35%, including a wheat aleurone layer, a starch, a bran powder, the nutrient component is rich in dietary fiber, protein, various minerals and vitamins, and the content of the wheat aleurone layer The content of pure wheat aleurone in the material is higher than 30%, and the content of dietary fiber is higher than 25%.

The screen unit of the screening unit has a mesh number of 100-120 mesh;

(5) using the induced draft fan to inhale the contents of the wheat aleurone layer in the step (4) into the No. 5 cyclone receiver, and feeding the contents of the wheat aleurone layer into the abatment packaging unit by the No. 6 discharge valve; At the same time, the bran fine powder is sucked into the No. 6 cyclone receiver by the induced draft fan, and the bran fine powder is sent into the bran packaging unit metering package through the No. 7 feeding valve.

Further, in the step (1), the humidity of the silo is controlled by a humidity control unit, and the humidity control unit is disposed inside the silo unit, including a humidity meter, a humidifying unit, a dehumidifying unit, and a humidity controller;

In the step (1), the humidity meter acquires the humidity information in the silo unit, and feeds back to the humidity controller, and the humidity controller separately controls the humidifying unit and the dehumidifying unit to perform humidification or dehumidification, respectively;

When the humidity of the silo is lower than 40%, the humidification unit is triggered to start; when the humidity of the silo is higher than 55%, the dehumidification unit is triggered to start; When the silo humidity is between 40% and 55%, the humidification unit and the dehumidification unit are stopped.

Specifically, the humidification unit includes a spray humidification device, and the dehumidification unit includes a blast air dehumidification device.

The invention also discloses the content of the wheat aleurone layer prepared by the production process of extracting the content of the wheat aleurone layer by the pure physical dry method as described above.

The invention also discloses a production line for the pure physical dry extraction of the content of the wheat aleurone layer content as described above, comprising a feeding unit, a silo unit, a grinding unit, a receiving unit, a screening unit, a packaging unit and an electric Control cabinet;

Also included is a raw material humidity control unit disposed inside the silo unit, including a humidity meter, a humidifying unit, a dehumidifying unit, and a humidity controller;

The humidification unit includes a spray humidification device, and the dehumidification unit includes a blast air dehumidification device;

The humidity meter acquires humidity information in the silo unit, and feeds the humidity information to the humidity controller, and the humidity controller separately controls the humidifying unit and the dehumidifying unit to perform humidification or dehumidification respectively;

When the humidity of the silo is lower than 40%, the humidification unit is triggered to start; when the humidity of the silo is higher than 55%, the dehumidification unit is triggered to start; when the humidity of the silo is between 40% and 55%, the humidification is performed. The unit and the dehumidification unit stop working;

The grinding unit comprises a driving device, a transmission device, a multi-stage cyclone eddy current grinding device and a discharging device, the driving device comprises an electric motor, the current of the electric motor is controlled by a feeding frequency converter, and the feeding frequency converter is installed externally In the electrical control cabinet; the motor current range is 1.5-2.5A.

The present invention has the following advantages and effects as compared with the prior art.

1. Through the indirect humidity control from the silo to the raw material, the humidity of the raw materials entering the grinding unit can be more conveniently and effectively controlled, thereby improving the production efficiency, the flour yield and the quality.

If the humidity of the raw material is too high, the powder yield is low, which affects the production efficiency and production cost. If the humidity of the raw material is too low, the quality of the product after grinding has a certain influence, and the nutritional value of the product is damaged. Studies have shown that when the moisture content of the raw material is between 10% and 15%, the flour extraction rate of the wheat aleurone layer content reaches the highest 28%-35%, and the quality grade is relatively good, reaching the level of the first grade or above; When the moisture content of the raw material is less than 10%, the flour extraction rate is not reduced, but the quality grade is lowered, only the secondary quality is obtained, and the nutrients are also reduced by more than 10% after being measured; and when the moisture content of the raw material is higher than 15%, Although the grade has not been reduced, the powder extraction rate of the product is significantly reduced. Below 28%, it is obvious that the production efficiency is lowered, and the current of the cyclone mill is also greatly increased, which increases the energy consumption. In view of this, in the case of ensuring the product grade of the content of the wheat aleurone layer, without reducing the flour extraction rate of the content and not increasing the energy consumption, the moisture control of the raw material should be selected from 10% to 15%.

Through the indirect humidity control, that is, controlling the humidity of the silo, and indirectly controlling the humidity of the raw material, the above-mentioned effective control of the humidity of the raw material can be realized. Tests have shown that the humidity of the silo is between 40% and 55%, and the moisture content of the raw material is correspondingly between 10% and 15%. The indirect humidity control of the present application can be realized by the following settings: that is, a controller controls the humidification and dehumidification synergy, and the humidity control reaction is sensitive, thereby ensuring the timeliness and accuracy of the raw material moisture control.

On the other hand, the humidity control of the present invention, which is completed in the silo, also has the advantage of controlling the humidity in the outer bin, More conducive to energy saving and environmental protection. In terms of energy saving, it embodies the control in the silo and can be recycled. The humidification and dehumidification are carried out in a closed silo, which can improve efficiency and reduce energy consumption. In terms of environmental protection, it is reflected in the silo. Humidity control does not cause dust pollution and steam pollution to the surrounding environment.

2. In the present invention, the selection of the particle size of the raw material is more scientific and reasonable, and the production efficiency, the flour yield and the product quality are ensured.

The invention selects a bran raw material having a particle size of 2-4 mm, and the content of the pure aleurone layer in the wheat aleurone layer content product is the highest in the particle size range. In contrast, when the bran raw material has a particle size of less than 2-4 mm, the yield of the wheat aleurone content product is higher but the pure aleurone content is lower, which is due to the small particle size. The bran raw material is easily smashed into the wheat aleurone layer content product by the whole pulverization (including the outer seed coat), which not only reduces the content of the pure aleurone layer, but also the pesticide residue of the outer seed coat will enter the product, and even Reduced product grades, seriously affecting the nutritional value and safety of the product.

In the present invention, a bran raw material having a particle diameter of 2-4 mm is used, and the yield of the content of the aleurone layer product is 28% to 35%, and the content of the pure aleurone layer is 30% or more. The grain size of the bran raw material is less than 2-4 mm, and the output of the content of the aleurone layer is only 33%-37%, but the content of the pure aleurone layer is obviously lower than 20%, resulting in a decrease in the content of the pure aleurone layer in the product. The product grade is significantly reduced.

3. The current of the driving device is controlled by the feeding inverter to a certain range (1.5-2.5A), and then the feeding speed of the cyclone eddy current mill is controlled to ensure the stable feeding and the separation effect is optimal.

DRAWINGS

1 is a schematic view showing a production process of an embodiment of the present invention;

2 is a schematic view of a production line of an embodiment of the present invention.

detailed description

The invention provides a pure physical dry method for extracting the content of the wheat aleurone layer content, as shown in FIG. 1 , comprising the following steps:

(1) Preparation: the raw material is wheat bran with a particle size of 2-4 mm;

(2) The raw material is poured into the feeding hopper, and the stirring hopper is installed in the feeding hopper, and is sucked into the first cyclone dust removing group by the induced draft fan to remove impurities such as dust, and then sent to the silo through the discharging valve, in the silo The raw materials are controlled for humidity, agitation and storage, and the moisture content of the raw materials reaches 10%-15%;

(2) Feeding the raw materials in the silo unit into the grinding unit for grinding: Specifically, several discharging ports are arranged under the silo, and a screw feeder is arranged between each discharging port and the silo, and each material is unloaded. The mouth corresponds to a grinding device; the raw material sent to the grinding unit through the screw feeder is used to make the structure of the wheat bran loose and easy to be crushed by collision, friction, rubbing and impact by the grinding device; and then the wheat aleurone layer and the wheat The skin layer of the bran is stripped; the mixture of the wheat aleurone layer component and the non-wheat aleurone layer component is then further comminuted to the corresponding particle size and meets the screening specifications. among them,

The grinding unit comprises a driving device, a transmission device, a multi-stage cyclone eddy current grinding device and a discharging device, the driving device comprises an electric motor, the current of the electric motor is controlled by a feeding frequency converter, and the feeding frequency converter is installed externally In the control system; the motor current adopts 1.5-2.5A; according to the material state, the working state of the multi-stage cyclone eddy current mill, the feed motor is adjusted by the feed frequency converter to control the speed of the transmission device (the auger), thereby controlling Enter the feed rate of the cyclone vortex mill to ensure the stability and separation of the feed. Through theoretical analysis, when the current is lower than 1.5A, the flour extraction rate of wheat aleurone layer content is less than 25%, the quality grade is also second-class and below; when the current is higher than 2.5A, the content of wheat aleurone layer The flour extraction rate is high and the quality level is also second-class and below. Combined with the test data, it is more proof of its point of view. In the test, when the current was 1.3A, the flour extraction rate of the wheat aleurone layer content was 22%, and the quality grade was third. When the current was 2.0A, the flour extraction rate of the wheat aleurone layer content was 33.5%. The grade is first grade; when the current is 2.6A, the flour extraction rate of the content of the wheat aleurone layer is 35%, and the quality grade is second. Therefore, according to the actual process production requirements (the powder yield of the aleurone layer product is 28%-35% and the product grade must be one or more), the motor current is selected to be between 1.5-2.5A.

The wheat aleurone layer component has a particle size of 1.4-150 μm.

The non-wheat aleurone layer component has a particle size of 150-2000 μm;

(4) The mixture in the receiving bin falls to the bottom and passes through the No. 2 discharge valve into the following receiving bin, which is then sucked into several cyclone receivers by the induced draft fan and sent to the sieve through several discharge valves. Screening and separation in a subunit, and obtaining a bran fine powder mainly comprising a wheat aleurone layer content and a component mainly comprising a non-wheat aleurone layer component;

The screen unit of the screening unit has a mesh number of 100-120 mesh;

(5) separately metering and packaging: using the induced draft fan to infiltrate the contents of the wheat aleurone layer which is sieved out into the No. 5 cyclone receiver, and send the contents of the wheat aleurone layer to the aleurone packaging unit through the No. 6 discharge valve. At the same time, the bran fine powder is sucked into the No. 6 cyclone dust collector by the induced draft fan, and the bran fine powder is sent into the bran packaging unit metering package through the No. 7 feeding valve.

Specifically, the humidity control of the raw materials in the silo is realized by a humidity control unit in the silo: the humidity control unit is disposed inside the silo unit, including a humidity meter, a humidifying unit, a dehumidifying unit, and a humidity controller;

The humidity meter acquires the humidity information in the silo unit and feeds back to the humidity controller, and the humidity controller separately controls the humidifying unit and the dehumidifying unit to perform humidification or dehumidification respectively;

When the humidity of the silo is lower than 40%, the humidification unit is triggered to start; when the humidity of the silo is higher than 55%, the dehumidification unit is triggered to start; when the humidity of the silo is between 40% and 55%, the humidification is performed. The unit and the dehumidification unit stop working.

The humidity control unit indirectly realizes the humidity control of the raw materials in the silo by controlling the humidity of the silo. Efficient and convenient without any environmental pollution problems including dust or steam.

Tests have shown that when the humidity in the silo is between 40% and 55%, the moisture content of the raw material corresponds to 10%-15%.

The production line of the above pure physical dry method for extracting the content of the wheat aleurone layer, as shown in FIG. 2, comprises a feeding unit, a silo unit, a grinding unit, a receiving unit, a screening unit, a packaging unit and an electrical control unit. a humidity control unit is disposed inside the silo unit, and includes a humidity meter, a humidification unit, a dehumidification unit, and a humidity controller;

Through the control of the humidity in the silo, the humidity control unit realizes the indirect control of the humidity of the raw material conveniently, efficiently and environmentally;

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any technical person skilled in the art within the technical scope disclosed by the present invention, the technical solution according to the present invention And equivalents or modifications of the inventive concept are intended to be included within the scope of the invention.

Claims

A pure physical dry process for extracting the content of wheat aleurone layer content, comprising the following steps:

(1) Feed the raw materials into the silo unit, stir and store:

The raw material is wheat bran having a particle diameter of 2-4 mm, the water content is not less than 10%, and not more than 15%; the humidity of the silo is 40%-55%;

(2) feeding the raw materials in the silo unit into the grinding unit, and grinding the wheat bran into a mixture comprising the wheat aleurone layer component and the non-wheat aleurone layer component by means of collision, friction, rubbing and impact. among them,

The grinding unit comprises a driving device, a transmission device, a multi-stage cyclone eddy current grinding device and a discharging device, the driving device comprises an electric motor, the current of the electric motor is controlled by a feeding frequency converter, and the feeding frequency converter is installed externally In the control system; the motor current is 1.5-2.5A;

The wheat aleurone layer component has a particle size of 1.4-150 μm.

The non-wheat aleurone layer component has a particle size of 150-2000 μm;

(3) conveying the ground mixture to the receiving bin by using a high-pressure induced draft fan, the flow rate of the induced draft fan is 2200-5500 m 3 /h, and the total pressure is 4000-12000 Pa;

(4) The mixture in the receiving bin falls to the bottom and passes through the No. 2 discharge valve into the following receiving bin, which is then sucked into several cyclone receivers by the induced draft fan and sent to the sieve through several discharge valves. Screening and separation in a sub-unit, and obtaining a bran fine powder mainly comprising a wheat aleurone layer content and a main non-wheat aleurone layer component;

The content of the wheat aleurone layer is 28-35%, including a wheat aleurone layer, a starch, a bran powder, the nutrient component is rich in dietary fiber, protein, various minerals and vitamins, and the content of the wheat aleurone layer The content of pure wheat aleurone layer is higher than 30%, and the content of dietary fiber is higher than 25%;

The screen unit of the screening unit has a mesh number of 100-120 mesh;

(5) using the induced draft fan to inhale the contents of the wheat aleurone layer in the step (4) into the No. 5 cyclone receiver, and feeding the contents of the wheat aleurone layer into the abatment packaging unit by the No. 6 discharge valve; At the same time, the bran fine powder is sucked into the No. 6 cyclone receiver by the induced draft fan, and the bran fine powder is sent into the bran packaging unit metering package through the No. 7 feeding valve.
The process for producing a wheat aleurone layer content by pure physical dry method according to claim 1, wherein:

In the step (1), the humidity of the silo is controlled by a humidity control unit, and the humidity control unit is disposed inside the silo unit, including a humidity meter, a humidifying unit, a dehumidifying unit, and a humidity controller;

In step (1), the humidity meter acquires the humidity information in the silo unit through its probe, and feeds back to the humidity controller, and the humidity controller separately controls the humidifying unit and the dehumidifying unit to perform humidification or dehumidification, respectively;

When the humidity of the silo is lower than 40%, the humidification unit is triggered to start; when the humidity of the silo is higher than 55%, the dehumidification unit is triggered to start; When the silo humidity is between 40% and 55%, the humidification unit and the dehumidification unit are stopped.
A process for producing a wheat aleurone layer content by pure physical dry method according to claim 2, wherein:

The humidification unit includes a spray humidification device, and the dehumidification unit includes a blast air dehumidification device.
A process for producing a wheat aleurone layer by a pure physical dry method according to any one of claims 1 to 3, characterized in that:

The step (1) firstly includes pouring the raw material into the feeding hopper, sucking the first cyclone dust removing group through the induced draft fan to remove impurities such as dust, and then feeding the material into the silo through the discharging valve.
The process for producing a wheat aleurone layer content by pure physical dry method according to claim 4, wherein:

A stirring device is installed in the feed hopper.
The process for producing a wheat aleurone layer content by pure physical dry method according to claim 5, wherein:

In the step (2), a plurality of discharge ports are arranged under the silo, and a screw feeder is arranged between each of the discharge ports and the silo, and each of the discharge ports corresponds to one grinding device.
A process for producing a wheat aleurone layer by a pure physical dry method according to any one of claims 1 to 3, characterized in that:

In the step (2), the structure of the wheat bran is loosely and easily pulverized by using a grinding device; and the skin layer of the wheat aleurone layer and the wheat bran is peeled off; then the wheat aleurone layer component and the non-wheat aleurone layer group are The pulverization is further pulverized to the corresponding particle size and conforms to the screening specifications.
A wheat aleurone layer content prepared by the process for extracting the contents of wheat aleurone layer by the pure physical dry method according to any one of claims 1-3.
A wheat aleurone layer content prepared by the process of extracting the contents of wheat aleurone layer by the pure physical dry method according to claim 6.
A production line for a process for producing a wheat aleurone layer content by a pure physical dry method according to any one of claims 1 to 3, comprising a feed unit, a silo unit, a grinding unit, a receiving unit, a screening unit, and Packaging unit and electrical control cabinet, characterized by:

Also included is a raw material humidity control unit disposed inside the silo unit, including a humidity meter, a humidifying unit, a dehumidifying unit, and a humidity controller;

The humidification unit includes a spray humidification device, and the dehumidification unit includes a blast air dehumidification device;

The humidity meter acquires humidity information in the silo unit, and feeds the humidity information to the humidity controller through a signal, and the humidity controller separately controls the humidifying unit and the dehumidifying unit to perform humidification or dehumidification respectively;

When the humidity of the silo is lower than 40%, the humidification unit is triggered to start; when the humidity of the silo is higher than 55%, the dehumidification unit is triggered to start; when the humidity of the silo is between 40% and 55%, the humidification is performed. The unit and the dehumidification unit stop working;

The grinding unit comprises a driving device, a transmission device, a multi-stage cyclone eddy current grinding device and a discharging device, the driving device comprises an electric motor, the current of the electric motor is controlled by a feeding frequency converter, and the feeding frequency converter is installed externally In the electrical control cabinet; the motor current range is 1.5-2.5A.