Formula of'nutrient + dietary fiber 'powder and preparation method of'nutrient + dietary fiber' powder
Dietary fiber powder prepared by spray-drying nutrients through top spray technology solves the problem of uniform mixing between nutrients and dietary fiber, achieves efficient nutrient distribution and safety of healthy food, avoids the use of artificial synthetic adhesives, and satisfies the satisfaction of Diversified demand for healthy foods.
Patent Information
- Application Number
- CN202411315670.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2024-12-06
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The prior art is difficult to achieve stable uniformity when mixing nutrients and dietary fiber, and artificially synthesized adhesives are often required, resulting in health risks and natural ingredient labeling problems.
The dietary fiber powder prepared by spray-drying the nutrients is accurately controlled by the selection and ratio of raw materials and equipment operating parameters to ensure that the nutrients are evenly distributed on the dietary fiber powder carrier, and avoid the use of artificial synthetic adhesives.
It achieves a high degree of uniformity and stability of dietary fiber particles, enhances the absorption and utilization of nutrients, avoids health risks and the influence of natural ingredients, improves the safety and attractiveness of the products, and meets the standards of healthy and natural foods.
Smart Images
Figure CN119073595A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of food and health product processing, in particular to a formula of "nutrients + dietary fiber" powder and a preparation method thereof. Background Art
[0002] Affected by modern lifestyles and eating habits, it is difficult for people to get enough dietary fiber from their daily diet. Insufficient dietary fiber is closely related to a variety of health problems, such as digestive system diseases and cardiovascular problems. Nutrients, including but not limited to elderberry extract rich in anthocyanins, cranberry powder, blueberry powder, celery powder, phycocyanin powder, vitamins, amino acids, grape seed extract, curcumin, etc.) and dietary fiber powder from natural sources (including but not limited to resistant dextrin, oligomaltose, oligofructose, inulin, galacto-oligosaccharides, xylo-oligosaccharides, arabino-oligosaccharides and β-glucan, etc.) are co-granulated to obtain "nutrients + dietary fiber" powder to better meet people's requirements for healthy diet and health care.
[0003] However, combining dietary fiber and other nutrients from natural sources into one product faces some challenges. For example, cellulose products have strong hygroscopicity and uneven particle size. Nutrients usually have poor powder fluidity, which makes it difficult to achieve stable mixing uniformity. Conventional product processes require the use of non-natural synthetic adhesives to promote the mixing of two or more substances, thereby introducing unnecessary chemical additives, which may not only pose potential risks to consumer health, but may also affect the product's natural ingredient label and reduce its appeal to health-conscious consumers.
[0004] To this end, we propose a formula of "nutrients + dietary fiber" powder and a preparation method thereof. Summary of the invention
[0005] The present invention mainly solves the technical problems existing in the above-mentioned prior art and provides a formula of "nutrients + dietary fiber" powder and a preparation method thereof.
[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: the formula of "nutrient + dietary fiber" powder includes the following raw materials in weight: 1-40 parts of nutrients, 25-2700 parts of dietary fiber powder carrier and 100 parts of solvent, the weight proportion of nutrients in the solvent is 1%-40%, ensuring that the solution has appropriate fluidity and is suitable for spraying, and the solvent will be removed during the spray drying process. The weight proportion of nutrients in the total raw materials is 0.5%-40%, and the weight proportion of dietary fiber powder carrier in the total raw materials is 20%-99.5%.
[0007] Preferably, the nutrients include but are not limited to elderberry extract, cranberry powder, blueberry powder, celery powder, phycocyanin powder, vitamins, amino acids, grape seed extract and curcumin.
[0008] Preferably, the dietary fiber powder carrier includes but is not limited to resistant dextrin, maltooligosaccharide, fructooligosaccharide, inulin, galacto-oligosaccharide, xylooligosaccharide, arabino-oligosaccharide and isomaltooligosaccharide.
[0009] Preferably, the solvent includes but is not limited to purified water and ethanol.
[0010] The preparation method of the "nutrients + dietary fiber" powder includes the above-mentioned formula of the "nutrients + dietary fiber" powder, and specifically includes the following steps:
[0011] Step 1: Weigh nutrients and solvents: weigh nutrients and solvents according to the ratio;
[0012] Step 2: prepare nutrient solution: add the weighed nutrient powder into the weighed solvent, stir and dissolve to obtain nutrient solution for use;
[0013] Step 3: Weigh the dietary fiber powder carrier: weigh the dietary fiber powder carrier according to the ratio;
[0014] Step 4: Spray drying: put the weighed dietary fiber powder carrier into the multifunctional top spray equipment, add the nutrient solution into the multifunctional top spray equipment, set the working parameters of the multifunctional top spray equipment, stop drying when the material temperature is controlled at 40-50°C, collect the material, and obtain the nutrient + dietary fiber particles;
[0015] Step 5: Quality testing: Determine the angle of repose, bulk density, tap density and content of the nutrients + dietary fiber particles.
[0016] Preferably, the working parameters of the multifunctional top spray equipment in the fourth step are: air volume 100-300 cubic meters / hour, air temperature 50°C-120°C, spray speed 100-250g / min, and spray pressure 1bar-3bar.
[0017] The present invention provides a formula of "nutrients + dietary fiber" powder and a preparation method thereof. It has the following beneficial effects:
[0018] 1. The formula of the "nutrient + dietary fiber" powder and its preparation method. The present invention uses top spraying technology to spray nutrients onto the surface of a dietary fiber powder carrier, which effectively overcomes the problem of the traditional preparation method that often requires the use of artificially synthesized adhesives to avoid the problem of uniformity and stability of the mixing of nutrients and dietary fiber, and obtains uniform and stable dietary fiber particles. By accurately controlling the selection and ratio of raw materials, solution preparation and equipment operating parameters, the stability of the product in the production process is ensured and the product quality is improved.
[0019] 2. The formula of the "nutrient + dietary fiber" powder and its preparation method. The finished particles of the present invention have high uniformity and stability, which greatly facilitates the use of consumers. By utilizing the top spraying technology, the physical stability problem commonly seen in traditional mixing methods is solved, ensuring that the nutrients are more evenly distributed and more effectively absorbed and utilized by the human body, thereby enhancing the health benefits of the product. In addition, the health effects of using artificial synthetic adhesives and the effects on product taste and mouthfeel are avoided, the safety of the product is improved, and it is more in line with the current high standards of consumers for healthy and natural food.
[0020] 3. The formula of the "nutrient + dietary fiber" powder and its preparation method, by setting the nutrients, make the whole dietary fiber product have a rich taste and aroma. Different nutrient formulas give the dietary fiber products a unique taste and aroma. For example, the granules of elderberry fruits and vegetables have a slightly sour and slightly sweet taste, with a faint aroma of elderberry, the granules of cranberry fruits and vegetables have a slightly sour and slightly sweet taste, with a sour and sweet aroma of cranberry, and the granules of celery powder and phycocyanin powder have the aroma of celery. These rich tastes and aromas increase the attractiveness of the products and meet the diverse needs of consumers for food flavors.
[0021] 4. The formula of the "nutrient + dietary fiber" powder and its preparation method, by setting up a dietary fiber powder carrier, the powdery structure of the dietary fiber powder carrier enables the entire product to be widely used in food and beverages. As a nutritional enhancer, it is particularly suitable for healthy foods that require increased dietary fiber intake, providing consumers with more healthy choices. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 The present invention is a flow chart of the method. DETAILED DESCRIPTION
[0023] Embodiment 1: The formula of "nutrients + dietary fiber" powder, such as Figure 1As shown, it is made of the following raw materials in parts by weight: 1 part of nutrients, 25 parts of dietary fiber powder carriers and 100 parts of solvents, the weight proportion of nutrients in the solvent is 1%, ensuring that the solution has appropriate fluidity and is suitable for spraying, and the solvent will be removed during the spray drying process, the weight proportion of nutrients in the total raw materials is 0.5%, and the weight proportion of dietary fiber powder carrier in the total raw materials is 20%, and the nutrients include but are not limited to elderberry extract, cranberry powder, blueberry powder, celery powder, phycocyanin powder, vitamins, amino acids, grape seed extract and Curcumin, dietary fiber powder carriers include but are not limited to resistant dextrin, oligomaltosaccharides, oligofructose, inulin, galacto-oligosaccharides, oligoxylose, arabino-oligosaccharides and isomalto-oligosaccharides, solvents include but are not limited to purified water and ethanol, and the preparation method of "nutrient + dietary fiber" powder includes the above-mentioned "nutrient + dietary fiber" powder formula, specifically comprising the following steps: the first step: weighing nutrients and solvent: weighing nutrients and solvent respectively according to the ratio; the second step: preparing nutrient solution: adding the weighed nutrient powder to the weighed solvent, stirring and dissolving to obtain The nutrient solution is set aside; the third step: weighing the dietary fiber powder carrier: weighing the dietary fiber powder carrier according to the ratio; the fourth step: spray drying: putting the weighed dietary fiber powder carrier into the multifunctional top spray equipment, adding the nutrient solution into the multifunctional top spray equipment, setting the working parameters of the multifunctional top spray equipment, stopping the drying when the material temperature is controlled at 40°C, collecting the material, and obtaining the nutrient + dietary fiber particles; the fifth step: quality inspection: measuring the repose angle, bulk density, tap density and content of the nutrient + dietary fiber particles. The working parameters of the multifunctional top spray equipment in the fourth step are specifically: air intake volume of 100 cubic meters / hour, air intake temperature of 50°C, spray speed of 100g / min, and spray pressure of 1bar. The present invention utilizes the top spray technology to spray the nutrients onto the surface of the dietary fiber powder carrier, effectively overcoming the problem that the traditional preparation method often needs to use an artificially synthesized adhesive to avoid the problem of uniformity and stability of the mixing of nutrients and dietary fibers, and obtains uniform and stable dietary fiber particles. By accurately controlling the selection and ratio of raw materials, solution preparation and equipment operating parameters, the stability of the product in the production process is ensured, and the product quality is improved.
[0024] Example 2: The formula of "nutrients + dietary fiber" powder, such as Figure 1As shown, it is made of the following raw materials in parts by weight: 5 parts of nutrients, 100 parts of dietary fiber powder carrier and 100 parts of solvent, the weight proportion of nutrients in the solvent is 5%, ensuring that the solution has appropriate fluidity and is suitable for spraying, and the solvent will be removed during the spray drying process. The weight proportion of nutrients in the total raw materials is 2.5%, and the weight proportion of dietary fiber powder carrier in the total raw materials is 49%. The nutrients include but are not limited to elderberry extract, cranberry powder, blueberry powder, celery powder, phycocyanin powder, vitamins, amino acids, grape seed extract and curcumin, dietary fiber The fiber carrier includes but is not limited to resistant dextrin, maltooligosaccharide, oligofructose, inulin, galacto-oligosaccharide, xylooligosaccharide, arabino-oligosaccharide and isomaltooligosaccharide; the solvent includes but is not limited to purified water and ethanol; the preparation method of "nutrient + dietary fiber" powder includes the above-mentioned "nutrient + dietary fiber" powder formula, which specifically includes the following steps: the first step: weighing nutrients and solvent: weighing nutrients and solvent respectively according to the ratio; the second step: preparing nutrient solution: adding the weighed nutrient powder to the weighed solvent, stirring and dissolving to obtain the nutrient solution for standby use; the third step: weighing the dietary fiber; the fourth step: weighing the nutrient powder; the fifth step: weighing the nutrient powder; the fifth step: weighing the nutrient powder; the sixth step: weighing the nutrient powder; the sixth step: weighing the nutrient powder; the seventh step: weighing the nutrient powder; the eighth ... Dietary fiber powder carrier: weigh the dietary fiber powder carrier according to the ratio; Step 4: spray drying: put the weighed dietary fiber powder carrier into the multifunctional top spray equipment, add the nutrient solution into the multifunctional top spray equipment, set the working parameters of the multifunctional top spray equipment, stop drying when the material temperature is controlled at 42°C, collect the material, and obtain the nutrient + dietary fiber particles; Step 5: quality inspection: measure the repose angle, bulk density, tap density and content of the nutrient + dietary fiber particles. The working parameters of the multifunctional top spray equipment in the fourth step are specifically: air intake volume 150 cubic meters / hour, air intake temperature 70°C, spray speed 150g / min, spray pressure 1.5bar. The finished particles of the present invention have high uniformity and stability, which greatly facilitates the use of consumers. By utilizing the top spray technology, the physical stability problem commonly found in traditional mixing methods is solved, ensuring that the nutrients are more evenly distributed and more effectively absorbed and utilized by the human body, thereby enhancing the health benefits of the product. In addition, the health effects and the effects of the taste and mouthfeel of the product caused by the use of artificially synthesized adhesives are avoided, the safety of the product is improved, and it is more in line with the current high standards of consumers for healthy and natural food.
[0025] Embodiment 3: The formula of "nutrients + dietary fiber" powder, such as Figure 1As shown, it is made of the following raw materials in parts by weight: 10 parts of nutrients, 500 parts of dietary fiber powder carrier and 100 parts of solvent, the weight proportion of nutrients in the solvent is 10%, ensuring that the solution has appropriate fluidity and is suitable for spraying, and the solvent will be removed during the spray drying process. The weight proportion of nutrients in the total raw materials is 1.5%, and the weight proportion of dietary fiber powder carrier in the total raw materials is 82%. The nutrients include but are not limited to elderberry extract, cranberry powder, blueberry powder, celery powder, phycocyanin powder, vitamins, amino acids, grape seed extract and curcumin. The fiber powder carrier includes but is not limited to resistant dextrin, maltooligosaccharide, oligofructose, inulin, galacto-oligosaccharide, xylooligosaccharide, arabino-oligosaccharide and isomaltooligosaccharide, and the solvent includes but is not limited to purified water and ethanol. The preparation method of "nutrient + dietary fiber" powder includes the above-mentioned formula of "nutrient + dietary fiber" powder, which specifically includes the following steps: the first step: weighing nutrients and solvent: weighing nutrients and solvent respectively according to the ratio; the second step: preparing nutrient solution: adding the weighed nutrient powder to the weighed solvent, stirring and dissolving to obtain the nutrient solution for standby use; the third step: weighing dietary fiber; the fourth step: weighing the nutrient powder; the fifth step: weighing the nutrient powder; the fifth step: weighing the nutrient powder; the sixth step: weighing the nutrient powder; the sixth step: weighing the nutrient powder; the seventh step: weighing the nutrient powder; the eighth ... Fiber powder carrier: weigh the dietary fiber powder carrier according to the ratio; Step 4: spray drying: put the weighed dietary fiber powder carrier into the multifunctional top spray equipment, add the nutrient solution into the multifunctional top spray equipment, set the working parameters of the multifunctional top spray equipment, stop drying when the material temperature is controlled at 45°C, collect the material, and obtain the nutrient + dietary fiber particles; Step 5: quality inspection: measure the angle of repose, bulk density, tap density and content of the nutrient + dietary fiber particles. The working parameters of the multifunctional top spray equipment in the fourth step are: air intake volume 200 cubic meters / hour, air intake temperature 80°C , spray speed 200g / min, spray pressure 2bar. By setting the nutrients, the whole dietary fiber product has a rich taste and aroma. Different nutrient formulas give dietary fiber products a unique taste and aroma. For example, the elderberry fruit and vegetable granules taste slightly sour and sweet, with a faint elderberry aroma, the cranberry fruit and vegetable granules taste slightly sour and sweet, with the sour and sweet aroma of cranberry, and the celery powder and phycocyanin powder granules have the aroma of celery. These rich tastes and aromas increase the attractiveness of the product and meet the diverse needs of consumers for food flavors.
[0026] Embodiment 4: The formula of "nutrients + dietary fiber" powder, such as Figure 1As shown, it is made of the following raw materials in parts by weight: 30 parts of nutrients, 2000 parts of dietary fiber powder carrier and 100 parts of solvent, the weight proportion of nutrients in the solvent is 30%, ensuring that the solution has appropriate fluidity and is suitable for spraying, and the solvent will be removed during the spray drying process, the weight proportion of nutrients in the total raw materials is 1.5%, and the weight proportion of dietary fiber powder carrier in the total raw materials is 94%, the nutrients include but are not limited to elderberry extract, cranberry powder, blueberry powder, celery powder, phycocyanin powder, vitamins, amino acids, grape seed extract and curcumin, the dietary fiber powder carrier includes but is not limited to resistant dextrin, maltooligosaccharide, oligofructose, inulin, galacto-oligosaccharide, xylooligosaccharide, arabino-oligosaccharide and isomaltooligosaccharide, the solvent includes but is not limited to purified water and ethanol, the preparation method of "nutrient + dietary fiber" powder, including the above-mentioned "nutrient + dietary fiber" powder formula, specifically includes the following steps: the first step: weighing nutrients and solvent: weighing nutrients and solvent respectively according to the ratio; the second step: preparing nutrient solution : Add the weighed nutrient powder to the weighed solvent, stir and dissolve to obtain a nutrient solution for use; the third step: weighing the dietary fiber powder carrier: weighing the dietary fiber powder carrier according to the ratio; the fourth step: spray drying: putting the weighed dietary fiber powder carrier into the multifunctional top spray equipment, adding the nutrient solution to the multifunctional top spray equipment, setting the working parameters of the multifunctional top spray equipment, stopping drying when the material temperature is controlled at 48°C, collecting the material, and obtaining the nutrient + dietary fiber particles; the fifth step: quality inspection: determining the angle of repose, bulk density, tap density and content of the nutrient + dietary fiber particles. The working parameters of the multifunctional top spray equipment in the fourth step are specifically: air intake volume 250 cubic meters / hour, air intake temperature 100°C, spray speed 220g / min, spray pressure 2.5bar. By setting the dietary fiber powder carrier, the powdery structure of the dietary fiber powder carrier enables the entire product to be widely used in food and beverages. As a nutritional enhancer, it is particularly suitable for healthy foods that need to increase dietary fiber intake, providing consumers with more healthy choices.
[0027] Embodiment 5: The formula of "nutrients + dietary fiber" powder, such as Figure 1As shown, it is made of the following raw materials in parts by weight: 40 parts of nutrients, 2700 parts of dietary fiber powder carrier and 100 parts of solvent, the weight proportion of nutrients in the solvent is 40%, ensuring that the solution has appropriate fluidity and is suitable for spraying, and the solvent will be removed during the spray drying process, the weight proportion of nutrients in the total raw materials is 40%, and the weight proportion of dietary fiber powder carrier in the total raw materials is 99.5%, the nutrients include but are not limited to elderberry extract, cranberry powder, blueberry powder, celery powder, phycocyanin powder, vitamins, amino acids, grape seed extract and curcumin, the dietary fiber powder carrier includes but is not limited to resistant dextrin, maltooligosaccharides, oligofructose, inulin, galacto-oligosaccharides, xylooligosaccharides, arabino-oligosaccharides and isomaltooligosaccharides, the solvent includes but is not limited to purified water and ethanol, the preparation method of "nutrient + dietary fiber" powder includes the above-mentioned formula of "nutrient + dietary fiber" powder, specifically The method comprises the following steps: a first step: weighing nutrients and a solvent: weighing nutrients and a solvent respectively according to a ratio; a second step: preparing a nutrient solution: adding weighed nutrient powder into a weighed solvent, stirring and dissolving to obtain a nutrient solution for standby use; a third step: weighing a dietary fiber powder carrier: weighing a dietary fiber powder carrier according to a ratio; a fourth step: spray drying: putting the weighed dietary fiber powder carrier into a multifunctional top spray device, adding the nutrient solution into the multifunctional top spray device, setting working parameters of the multifunctional top spray device, stopping drying when the material temperature is controlled at 50°C, collecting the material, and obtaining nutrient+dietary fiber particles; a fifth step: quality inspection: measuring the angle of repose, bulk density, tap density and content of the nutrient+dietary fiber particles, wherein the working parameters of the multifunctional top spray device in the fourth step are specifically: an air intake volume of 300 cubic meters / hour, an air intake temperature of 120°C, a spray speed of 250 g / min, and a spray pressure of 3 bar.
[0028] The working principle of the present invention is as follows: the nutrient solution is uniformly sprayed on the dietary fiber powder carrier through the spray drying technology to form tiny droplets. After entering the high-temperature drying chamber, the water of these droplets evaporates rapidly, thereby forming a uniform nutrient film on the surface of the dietary fiber powder carrier. Due to the high temperature and rapid drying characteristics in the spray drying process, the nutrients can be effectively fixed on the dietary fiber powder carrier while maintaining their biological activity. The working parameters of the spray drying equipment, such as air intake volume, air intake temperature, spray speed and spray pressure, have an important influence on the quality and characteristics of the final product. The air intake volume determines the air flow speed in the drying chamber, affects the evaporation rate of the droplets and the drying degree of the particles, and the air intake temperature directly affects the drying speed of the material and the temperature of the final product. Too high or too low temperature may lead to the loss of nutrients or uneven particles. The spray speed and spray pressure have an important influence on the quality and characteristics of the final product. It determines the spraying rate of the nutrient solution and the size of the droplets, which in turn affects the formation and uniformity of the particles. The "nutrient + dietary fiber" powder product of the present invention has multiple advantages. First, the particles prepared by spray drying technology have good fluidity and dispersibility, which are convenient for uniform addition to food and beverages. Secondly, the combination of nutrients and dietary fiber not only improves the nutritional value of the product, but also improves the taste and aroma, meeting the diverse needs of consumers for healthy food. In addition, the product has a long shelf life and is convenient for storage and transportation. In actual applications, the "nutrient + dietary fiber" powder of the present invention can be widely used in various foods and beverages, such as cereal breakfasts, yogurt, juice, energy bars, nutritional supplements, etc. By adding this product, consumers can be provided with healthy food options rich in dietary fiber and multiple nutrients, which helps improve the dietary structure and promotes physical health.
[0029] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. The formula of "nutrients + dietary fiber" powder is characterized by: The invention comprises the following raw materials in parts by weight: 1-40 parts of nutrients, 25-2700 parts of dietary fiber powder carrier and 100 parts of solvent, wherein the weight proportion of nutrients in the solvent is 1%-40%, the weight proportion of nutrients in the total raw materials is 0.5%-40%, and the weight proportion of dietary fiber powder carrier in the total raw materials is 20%-99.5%.
2. The formula of the "nutrient + dietary fiber" powder according to claim 1, characterized in that: The nutrients include, but are not limited to, elderberry extract, cranberry powder, blueberry powder, celery powder, phycocyanin powder, vitamins, amino acids, grape seed extract and curcumin.
3. The formula of the "nutrient + dietary fiber" powder according to claim 1, characterized in that: The dietary fiber powder carrier includes, but is not limited to, resistant dextrin, maltooligosaccharide, fructooligosaccharide, inulin, galacto-oligosaccharide, xylo-oligosaccharide, arabino-oligosaccharide and isomaltooligosaccharide.
4. The formula of the "nutrient + dietary fiber" powder according to claim 1, characterized in that: The solvent includes, but is not limited to, purified water and ethanol.
5. A method for preparing "nutrients + dietary fiber" powder, characterized in that: A formula comprising the "nutrients + dietary fiber" powder according to any one of claims 1 to 4, specifically comprising the following steps: Step 1: Weigh nutrients and solvents: weigh nutrients and solvents according to the ratio; Step 2: prepare nutrient solution: add the weighed nutrient powder into the weighed solvent, stir and dissolve to obtain nutrient solution for use; Step 3: Weigh the dietary fiber powder carrier: weigh the dietary fiber powder carrier according to the ratio; Step 4: Spray drying: put the weighed dietary fiber powder carrier into the multifunctional top spray equipment, add the nutrient solution into the multifunctional top spray equipment, set the working parameters of the multifunctional top spray equipment, stop drying when the material temperature is controlled at 40-50°C, collect the material, and obtain the nutrient + dietary fiber particles; Step 5: Quality testing: Determine the angle of repose, bulk density, tap density and content of the nutrients + dietary fiber particles.
6. The method for preparing the "nutrients + dietary fiber" powder according to claim 5, characterized in that: The working parameters of the multifunctional top spray equipment in the fourth step are specifically: air inlet volume 100-300 cubic meters / hour, air inlet temperature 50°C-120°C, spray speed 100-250g / min, and spray pressure 1bar-3bar.