Preparation method of seven-bead stomach tea with pearl tea as carrier

Abstract

This invention discloses a method for preparing Qizhu Jianwei Tea (Seven-Bead Stomach-Strengthening Tea) using pearl tea as a carrier, belonging to the field of traditional Chinese medicine tea preparation technology. This invention follows the national drug standard prescription for Qizhu Jianwei Tea, selecting pearl tea with specific particle size and caffeine index from Wuyuan, Jiangxi and Shengzhou, Zhejiang as the carrier. The pearl tea spherical particles have uniform particle size, stable flowability and bulk density, achieving stable finished product content and reducing content variation. The medicinal material is pulverized using an 8-12mm sieve. The decoction is first initially concentrated, then subjected to a high-speed disc centrifuge at 6000-8000 r / min to remove suspended colloids and particles, followed by further concentration to obtain a high-purity extract of 1.05-1.10. A water chestnut-type sugar coating machine or a high-efficiency film coating machine is used at a low temperature of 40-50℃ and an atomization pressure of 0.15-0.35 MPa, with 8-12 intermittent sprayings and layer-by-layer drying. This invention utilizes the excellent tumbling properties of pearl tea spherical particles to achieve uniform thin-layer drug loading; the low-temperature process not only preserves the original tea aroma of pearl tea to the maximum extent, but also inhibits the loss of caffeine due to heat, ensuring that the caffeine content remains basically stable before and after the spray coating process; centrifugal refining removes impurities, resulting in a clear and bright tea soup with high utilization rate of active ingredients, uniform particle size, controllable filling amount, and stable quality, making it suitable for industrial production.

Description

Technical Field

[0001] This invention relates to the field of traditional Chinese medicine tea preparation technology, specifically to a method for preparing Qizhu Jianwei Tea based on the national drug standard prescription, using specific pearl tea as a carrier, and combining high-speed centrifugal refining of the medicinal liquid with low-temperature layered atomization spray coating process, which takes into account the preservation of the original aroma of pearl tea, the stability of the caffeine content of pearl tea before and after spray coating, the stable and controllable content of the finished product, and the clear and bright tea soup. Background Technology

[0002] The National Drug Standard WS-11072(ZD-1072)-2002-2011Z discloses the Seven-Bead Stomach-Strengthening Tea, with the following prescription: 30g hawthorn, 15g prunella vulgaris, 15g chrysanthemum, 15g radish seed, 6g dried tangerine peel, 5g Panax notoginseng, 30g rice sprout, 15g codonopsis pilosula, 15g ginseng leaf, 15g cassia seed (fried), and 1000g tea leaves.

[0003] The standard preparation method is as follows: Except for tea, the other ten ingredients are crushed into coarse powder, boiled with water three times, each time for 2 hours, the decoctions are combined, filtered, and the filtrate is concentrated to a clear paste with a relative density of 1.05~1.10 (55~60℃). The paste is evenly sprayed onto the tea, mixed, dried below 80℃, and then packaged.

[0004] Current production processes mostly use green or black tea as a carrier, coarsely crush it, spray with a paste, mix well, and then dry in a hot air circulating oven or vacuum. However, existing national standard processes and conventional production processes have the following drawbacks: 1. The carrier is only broadly defined as tea leaves, without specifying the type, origin, particle size, or internal quality of the tea. Ordinary tea has an irregular shape and is prone to stacking, breaking, and powdering in dynamic coating equipment. Extract tends to accumulate in the folds and gaps, resulting in localized clumping and bare tea leaves with no extract, leading to poor uniformity of extract loading. At the same time, the bulk density of broken tea fluctuates greatly, resulting in poor flowability, large differences in gaps during packaging and filling, poor stability of finished product weight, and large batch quality fluctuations.

[0005] 2. The decoction is only filtered using ordinary methods, which can only remove coarse dregs, but cannot remove fine dregs, plant colloids, or suspended particles. When the finished product is brewed, these particles precipitate out, making the tea soup cloudy and resulting in a poor appearance.

[0006] 3. Traditional drying processes can reach temperatures as high as 80℃. High temperatures cause the aromatic substances in tea to volatilize, and at the same time, the caffeine inside the pearl tea will migrate due to heat and be lost with the moisture. After the paste is processed, the caffeine content of the carrier decreases, resulting in fluctuations in the internal quality of the finished product.

[0007] 4. The extract is sprayed in one go and then dried after mixing. The upper limit of the drying temperature can reach 80℃. Higher temperatures will cause a large amount of aromatic substances in the tea to evaporate and dissipate, resulting in a weak aroma in the finished tea, with the medicinal taste masking the tea flavor and poor flavor coordination between the medicinal tea and the tea.

[0008] 5. The medicinal materials are only recorded as being pulverized into coarse powder, without particle size control; excessive pulverization will produce a large amount of fine powder, increasing suspended impurities in the medicinal liquid and further aggravating the problem of turbidity in the tea soup.

[0009] In summary, existing technologies, without altering the formulation ratio, cannot simultaneously achieve uniform drug loading in the particles, preservation of tea aroma, stable caffeine content before and after coating, stable finished product volume, and clear tea infusion. Therefore, new preparation processes need to be developed to solve these technical problems. Summary of the Invention

[0010] Purpose of the invention To address the shortcomings of existing Seven-Ball Stomach-Strengthening Tea production processes, such as poor carrier compatibility, uneven application of medicine to tea leaves, loss of tea aroma due to volatilization, reduced caffeine content due to heat, poor stability of packaging weight, and cloudy tea infusion, this invention provides a method for preparing Seven-Ball Stomach-Strengthening Tea using pearl tea as a carrier. This invention strictly adheres to the national standard prescription ratio, selects pearl tea from specific origins and with specific physicochemical indicators as the carrier, and employs a process involving particle size control, high-speed disc centrifugation refining, and low-temperature layered intermittent atomization coating at 40-50℃. Utilizing the excellent rolling characteristics of pearl tea spherical particles, a thin-layer uniform application of medicine is achieved. The spherical particles are uniform in size, have good flowability, and ensure stable filling of gaps during packaging, resulting in stable finished product weight with minimal variation. The low-temperature environment and layered coating inhibit the thermal migration and volatilization of caffeine, ensuring that the caffeine content of the pearl tea remains essentially unchanged before and after coating, with no significant decrease. Simultaneously, the inherent aroma of pearl tea is preserved to the maximum extent, resulting in a clear and bright brewed tea with a harmonious blend of medicinal and tea flavors and good product quality stability.

[0011] Technical solution

[0012] A method for preparing a seven-bead stomach-strengthening tea using pearl tea as a carrier includes the following steps: pearl tea selection and pretreatment, coarse crushing of Chinese medicinal materials, decoction extraction with water, segmented concentration-high-speed centrifugal refining, low-temperature layered atomization spray coating, intermittent constant temperature drying, mixing, and sealing packaging. The raw material prescription is consistent with the national drug standard prescription for Qizhu Jianwei Tea, and is calculated by weight as follows: 30 parts hawthorn, 15 parts prunella vulgaris, 15 parts chrysanthemum, 15 parts radish seed, 6 parts dried tangerine peel, 5 parts Panax notoginseng, 30 parts rice sprout, 15 parts codonopsis, 15 parts ginseng leaf, 15 parts roasted cassia seed, and 1000 parts pearl tea.

[0013] Step 1: Pre-processing of Pearl Tea Materials The carrier pearl tea is selected from Wuyuan, Jiangxi and Shengzhou, Zhejiang. The pearl tea particles are selected to be round, compact and spherical with a particle size of 1-5mm. The caffeine content of the pearl tea raw material is controlled to be ≥2.5%, the moisture content to be ≤10%, and the extract to be ≥25%. The raw material is passed through a 20-mesh sieve to remove broken pieces and dust, and then set aside.

[0014] Carrier compatibility description: Ordinary tea leaves are irregular in shape and easily pile up and break during the tumbling process of coating equipment, making it difficult to achieve a uniform thin layer of paste. The pearl tea selected in this invention is a compact round bead with excellent flowability and tumbling performance. When the coating equipment rotates, each pearl tea bead can be fully turned over, and the surface of the bead can fully contact the atomized drug mist, making it suitable for the layered intermittent paste spraying process. The pearl tea granules from this region are dense, with uniform pores, moderate adsorption performance, and are not prone to powdering. The spherical granules have uniform particle size and stable bulk density, with small fluctuations in voids during filling, ensuring stable finished product content, reducing content differences, and providing a carrier basis for uniform drug loading, preservation of original tea aroma, and stable caffeine content.

[0015] Step 2: Coarsely grind the Chinese medicinal herbs Clean and remove impurities from hawthorn, prunella vulgaris, chrysanthemum, radish seed, dried tangerine peel, Panax notoginseng, rice sprout, codonopsis, ginseng leaf, and cassia seed (fried), and coarsely crush them through an 8-12mm sieve.

[0016] This particle size ensures that the effective ingredients are fully dissolved during the decoction process, while avoiding excessive grinding that produces a large amount of fine powder, thus reducing the generation of suspended impurities in the medicinal liquid from the source.

[0017] Step 3: Decoction extraction, fractional concentration and high-speed centrifugation purification Add water to the pulverized Chinese medicinal materials and decoct three times (add 8 times the amount of water to the medicinal materials for the first time, and 6 times the amount of water to the medicinal materials for the second and third times), each time for 2 hours, and combine all the decoctions. Step 1: Preliminary concentration under reduced pressure: Concentrate the decoction under reduced pressure to a relative density of 1.02 (55-60℃). The second step is high-speed centrifugation to remove impurities: a high-speed disc centrifuge is used with a centrifugation speed of 6000-8000 r / min to remove suspended fine drug residues, plant colloids, insoluble particles and other ineffective impurities from the drug solution. The third step is vacuum concentration: the filtrate after centrifugation and clarification is concentrated again under vacuum to obtain a high-purity Chinese herbal extract with a relative density of 1.05-1.10 (55-60℃).

[0018] The final relative density of the purified extract in this step is consistent with the national pharmaceutical standard. By first concentrating and then centrifuging at high speed to remove impurities, a large number of ineffective colloids and suspended particles are removed. On the one hand, this ensures that the tea soup is clear and bright after brewing. On the other hand, it eliminates the problem of ineffective impurities occupying the adsorption sites of the pearl tea, thereby increasing the loading of effective ingredients and improving the utilization rate of effective ingredients.

[0019] Step 4: Low-temperature layered atomized spray coating and intermittent constant temperature drying. The pre-treated pearl tea is fed into a water chestnut-type sugar coating machine or a high-efficiency film coating machine; the machine speed is controlled at 15-35 r / min, and the temperature of the coating working chamber is controlled at 40-50℃. A high-pressure spray gun is used to atomize the ointment, with an atomization pressure of 0.15-0.35 MPa, to atomize the traditional Chinese medicine ointment into fine droplets; The herbal ointment is applied by intermittent spraying in 8-12 applications. After each application, the ointment is dried at a constant temperature of 40-50℃ for 10-25 minutes to achieve layer-by-layer spraying and drying.

[0020] This process strictly controls the low-temperature environment of 40-50℃ throughout. On the one hand, it is significantly lower than the national standard drying limit of 80℃, which minimizes the volatilization of aromatic substances in pearl tea and preserves the original aroma of the pearl tea. On the other hand, the low temperature condition can inhibit the migration of caffeine inside the pearl tea due to heat and its loss with water vapor, so that the caffeine content of the pearl tea remains basically stable before and after the spray coating process, without significant decrease. Layered thin-layer atomized spraying avoids the accumulation and clumping of the extract caused by spraying a large amount of paste at once. The clear paste adheres to the surface of the pearl tea particles in a thin layer without sealing the internal pores of the pearl tea. When brewing, the aroma of the pearl tea and the effective components of traditional Chinese medicine can be released simultaneously and evenly.

[0021] Step 5: Cool, mix, and seal in packaging. After the paste has dried, the material is transferred to a clean environment to cool to room temperature and mixed evenly. After the moisture and caffeine content are tested and found to be qualified, it is packaged and sealed with composite packaging materials to obtain the finished Qizhu Jianwei Tea.

[0022] Beneficial effects

[0023] Compared with existing national pharmaceutical standard processes, this invention has the following substantial features and advancements: 1. Stable finished product filling volume with minimal variation. This invention uses spherical pearl tea with uniform particle size, which has good particle flowability and stable bulk density. The void fluctuation during packaging and filling is small, which overcomes the defects of loose tea packing and large fluctuation of filling weight. The finished product has stable and controllable filling amount, which meets the quality requirements of different filling amounts of pharmaceutical tea preparations.

[0024] 2. The caffeine content of the pearl tea remained stable before and after spraying, with no significant decrease, ensuring the intrinsic quality of the finished product. This invention uses a low-temperature spray drying process at 40-50℃ throughout, which avoids the loss of caffeine inside the pearl tea due to heat migration and evaporation with moisture caused by high temperatures. The caffeine detection value of the pearl tea remains basically stable before and after coating processing, and there is no decrease in caffeine loss, ensuring that the internal quality of the finished product is stable and controllable.

[0025] 3. Preserves the original aroma of pearl tea to the greatest extent possible, and harmonizes the flavor of medicinal tea. The drying process of this invention maintains a low temperature of 40-50℃ throughout the drying process, which is far below the national standard drying limit of 80℃, greatly reducing the loss of aromatic substances in pearl tea due to heat volatilization; the thin-layer coating does not seal the pores of the pearl tea, and the tea aroma can be released normally during the brewing process, overcoming the defect of the traditional process where the medicinal taste masks the tea aroma, and the tea aroma and medicinal aroma are harmonious and palatable.

[0026] 4. Removes ineffective impurities from the medicinal liquid, resulting in a clear and bright tea infusion. High-speed disc centrifugation at 6000-8000 r / min removes fine medicinal residues, plant colloids, and suspended particles from the decoction. After brewing with boiling water, the finished product has no obvious suspended matter or sediment, and the tea soup is clear and transparent, improving the sensory quality of the product.

[0027] 5. Significantly improved utilization rate of active ingredients By removing ineffective impurities such as colloids and particles, and avoiding these impurities from occupying the adsorption sites of the pearl tea carrier, more medicinal active ingredients are adsorbed on the surface of the pearl tea, thus increasing the loading of active ingredients; thin-layer application of medicine does not clog pores, allowing for more complete extraction of active ingredients during brewing.

[0028] 6. Uniform drug loading in the granules, resulting in high product quality stability. Using spherical pearl tea as a dedicated carrier, and combined with a coating device for intermittent atomized spraying of the paste in layers, each pearl tea is fully rolled, resulting in a uniform thickness of the surface medicine layer, without lumps or bare granules. The finished product has a uniform appearance, with minimal quality differences between different batches, making it suitable for large-scale industrial production.

[0029] 7. Good process compatibility The formulation of this invention is consistent with the current national drug standards, with only the carrier selection and preparation process optimized. The final clear extract has a relative density that meets the standard requirements. The equipment used in the production is all general-purpose equipment in the pharmaceutical industry, which facilitates industrialization and implementation. Specific Implementation

[0031] Example 1

[0032] Ingredients: 30g hawthorn, 15g prunella vulgaris, 15g chrysanthemum, 15g radish seed, 6g dried tangerine peel, 5g Panax notoginseng, 30g rice sprout, 15g codonopsis pilosula, 15g ginseng leaf, 15g roasted cassia seed, 1000g pearl tea (originating from Wuyuan, Jiangxi).

[0033] 1) Pearl tea pretreatment: Select qualified pearl tea with a particle size of 1-5mm, caffeine content of 2.6%, moisture content of 8.5%, extract content of 27%, pass through a 20-sieve to remove fine particles and powder, and seal for later use.

[0034] 2) Mix and coarsely crush 10 medicinal herbs: hawthorn, prunella vulgaris, chrysanthemum, radish seed, dried tangerine peel, notoginseng, rice sprout, codonopsis, ginseng leaf, and cassia seed (fried). Use a 10mm sieve for coarse crushing.

[0035] 3) Add water to the medicinal materials and decoct 3 times (add 8 times the amount of water to the medicinal materials for the first time, and 6 times the amount of water to the medicinal materials for the second and third times), each time for 2 hours, and combine the decoctions; concentrate under reduced pressure to a relative density of 1.02 (58℃); centrifuge at 7000r / min to remove impurities; concentrate the centrifuged liquid again to obtain a high-purity extract with a relative density of 1.08 (58℃).

[0036] 4) Put the pearl tea into the water chestnut-type sugar coating machine, rotate at 30 r / min, keep the cavity temperature at 45℃; atomization pressure 0.25 MPa; spray the clear paste in 10 intermittent sprays, and dry at a constant temperature for 20 minutes after each spray.

[0037] 5) Cool to room temperature in the clean room and mix; test the finished pearl tea for caffeine content of 2.53% and moisture content that meets pharmaceutical standards; repackage and seal in paper-aluminum-plastic composite bags to obtain the finished product.

[0038] Example 2

[0039] Ingredients: 30g hawthorn, 15g prunella vulgaris, 15g chrysanthemum, 15g radish seed, 6g dried tangerine peel, 5g Panax notoginseng, 30g rice sprout, 15g codonopsis pilosula, 15g ginseng leaf, 15g roasted cassia seed, 1000g pearl tea (originating from Shengzhou, Zhejiang).

[0040] 1) Pearl tea pretreatment: Select qualified pearl tea with a particle size of 1-5mm, caffeine content of 2.8%, moisture content of 8.5%, extract content of 27%, pass through a 20-sieve to remove fine particles and powder, and seal for later use.

[0041] 2) Mix and coarsely crush 10 medicinal herbs: hawthorn, prunella vulgaris, chrysanthemum, radish seed, dried tangerine peel, notoginseng, rice sprout, codonopsis, ginseng leaf, and cassia seed (fried). Use a 10mm sieve for coarse crushing.

[0042] 3) Add water to the medicinal materials and decoct 3 times (add 8 times the amount of water to the medicinal materials for the first time, and 6 times the amount of water to the medicinal materials for the second and third times), each time for 2 hours, and combine the decoctions; concentrate under reduced pressure to a relative density of 1.02 (58℃); centrifuge at 7000r / min to remove impurities; concentrate the centrifuged liquid again to obtain a high-purity extract with a relative density of 1.08 (58℃).

[0043] 4) Put the pearl tea into the water chestnut-type sugar coating machine, with a rotation speed of 30 r / min and a constant temperature of 45℃ in the cavity; atomization pressure of 0.25 MPa; spray the clear paste in 10 intermittent sprays, and dry at a constant temperature for 20 minutes after each spray.

[0044] 5) Cool the cleanroom to room temperature and mix; test the finished pearl tea for caffeine content of 2.72% and moisture content that meets pharmaceutical standards; repackage and seal in paper-aluminum-plastic composite bags to obtain the finished product.

[0045] Example 3

[0046] Ingredients: 30g hawthorn, 15g prunella vulgaris, 15g chrysanthemum, 15g radish seed, 6g dried tangerine peel, 5g Panax notoginseng, 30g rice sprout, 15g codonopsis pilosula, 15g ginseng leaf, 15g roasted cassia seed, 1000g pearl tea (originating from Shengzhou, Zhejiang).

[0047] 1) Pearl tea pretreatment: Select qualified pearl tea with a particle size of 1-5mm, caffeine content of 2.8%, moisture content of 8.5%, extract content of 27%, pass through a 20-sieve to remove fine particles and powder, and seal for later use.

[0048] 2) Mix and coarsely crush 10 medicinal materials: hawthorn, prunella vulgaris, chrysanthemum, radish seed, dried tangerine peel, notoginseng, rice sprout, codonopsis, ginseng leaf, and cassia seed (fried). Use a 12mm screen for coarse crushing.

[0049] 3) Add water to the medicinal materials and decoct 3 times (add 8 times the amount of water to the medicinal materials for the first time, and 6 times the amount of water to the medicinal materials for the second and third times), each time for 2 hours, and combine the decoctions; concentrate under reduced pressure to a relative density of 1.02 (58℃); centrifuge at 6000r / min to remove impurities; concentrate the centrifuged liquid again to obtain a high-purity extract with a relative density of 1.05 (58℃).

[0050] 4) Put the pearl tea into the water chestnut-type sugar coating machine, with a rotation speed of 20 r / min and a constant temperature of 50℃ in the cavity; atomization pressure of 0.15 MPa; spray the clear paste in 12 intermittent sprays, and dry at a constant temperature for 10 minutes after each spray.

[0051] 5) Cool to room temperature in the clean room and mix; test the finished pearl tea for caffeine content of 2.75% and moisture content that meets pharmaceutical standards; repackage and seal in paper-aluminum-plastic composite bags to obtain the finished product.

[0052] Example 4

[0053] Ingredients: 30g hawthorn, 15g prunella vulgaris, 15g chrysanthemum, 15g radish seed, 6g dried tangerine peel, 5g Panax notoginseng, 30g rice sprout, 15g codonopsis pilosula, 15g ginseng leaf, 15g roasted cassia seed, 1000g pearl tea (originating from Shengzhou, Zhejiang).

[0054] 1) Pearl tea pretreatment: Select qualified pearl tea with a particle size of 1-5mm, caffeine content of 2.8%, moisture content of 8.5%, extract content of 27%, pass through a 20-sieve to remove fine particles and powder, and seal for later use.

[0055] 2) Mix and coarsely crush 10 medicinal herbs: hawthorn, prunella vulgaris, chrysanthemum, radish seed, dried tangerine peel, notoginseng, rice sprout, codonopsis, ginseng leaf, and cassia seed (fried). Use an 8mm screen for coarse crushing.

[0056] 3) Add water to the medicinal materials and decoct 3 times (add 8 times the amount of water to the medicinal materials for the first time, and 6 times the amount of water to the medicinal materials for the second and third times), each time for 2 hours, and combine the decoctions; concentrate under reduced pressure to a relative density of 1.02 (58℃); centrifuge at 8000r / min to remove impurities; concentrate the centrifuged liquid again to obtain a high-purity extract with a relative density of 1.10 (58℃).

[0057] 4) Put the pearl tea into the water chestnut-type sugar coating machine, rotate at 30 r / min, keep the cavity temperature at 40℃; atomization pressure 0.35MPa; spray the clear paste in 8 intermittent sprays, and dry at a constant temperature for 25 minutes after each spray.

[0058] 5) Cool to room temperature in the clean room and mix; test the finished pearl tea for caffeine content of 2.77% and moisture content that meets pharmaceutical standards; repackage and seal in paper-aluminum-plastic composite bags to obtain the finished product.

[0059] Example 5

[0060] Ingredients: 30g hawthorn, 15g prunella vulgaris, 15g chrysanthemum, 15g radish seed, 6g dried tangerine peel, 5g Panax notoginseng, 30g rice sprout, 15g codonopsis pilosula, 15g ginseng leaf, 15g roasted cassia seed, 1000g pearl tea (originating from Wuyuan, Jiangxi).

[0061] 1) Pearl tea pretreatment: Select qualified pearl tea with a particle size of 1-5mm, caffeine content of 2.6%, moisture content of 8.5%, extract content of 27%, pass through a 20-sieve to remove fine particles and powder, and seal for later use.

[0062] 2) Mix and coarsely crush 10 medicinal herbs: hawthorn, prunella vulgaris, chrysanthemum, radish seed, dried tangerine peel, notoginseng, rice sprout, codonopsis, ginseng leaf, and cassia seed (fried). Use a 10mm sieve for coarse crushing.

[0063] 3) Add water to the medicinal materials and decoct 3 times (add 8 times the amount of water to the medicinal materials for the first time, and 6 times the amount of water to the medicinal materials for the second and third times), each time for 2 hours, and combine the decoctions; concentrate under reduced pressure to a relative density of 1.02 (58℃); centrifuge at 7000r / min to remove impurities; concentrate the centrifuged liquid again to obtain a high-purity extract with a relative density of 1.08 (58℃).

[0064] 4) The pearl tea is put into a high-efficiency thin film machine, with a rotation speed of 30 r / min and a constant temperature of 45℃ in the chamber; the atomization pressure is 0.25 MPa; the paste is sprayed intermittently in 10 times, and each time the paste is sprayed and dried at a constant temperature for 20 minutes.

[0065] 5) Cool the cleanroom to room temperature and mix; test the finished pearl tea for caffeine content of 2.50% and moisture content that meets pharmaceutical standards; repackage and seal in paper-aluminum-plastic composite bags to obtain the finished product.

Claims

1. A method for preparing a seven-bead stomach-strengthening tea using pearl tea as a carrier, characterized in that, The process includes the following steps: pretreatment of pearl tea materials, coarse crushing of Chinese medicinal materials, decoction extraction, segmented concentration-high-speed centrifugal refining, low-temperature layered atomization spray coating, intermittent constant temperature drying, cooling mixing, and sealing packaging. The pearl tea used as the carrier is selected from pearl tea produced in Wuyuan, Jiangxi and Shengzhou, Zhejiang. The pearl tea particles have a diameter of 1-5 mm, and the raw materials contain ≥2.5% caffeine, ≤10% moisture, and ≥25% extract. The raw materials, by weight, are: 30 parts hawthorn, 15 parts prunella vulgaris, 15 parts chrysanthemum, 15 parts radish seed, 6 parts dried tangerine peel, 5 parts Panax notoginseng, 30 parts rice sprout, 15 parts codonopsis, 15 parts ginseng leaf, 15 parts roasted cassia seed, and 1000 parts pearl tea. The pearl tea consists of uniformly sized spherical particles with good flowability, stable bulk density, stable finished product weight, and small weight variation. The temperature is controlled at 40~50°C throughout the spray coating process, and the caffeine content of the pearl tea after processing is not significantly reduced compared with that before spray coating.

2. The method for preparing the Seven-Ball Stomach-Strengthening Tea using pearl tea as a carrier, characterized in that: After cleaning and removing impurities, Chinese medicinal materials are pulverized and sieved to a mesh size of 8-12 mm.

3. The method for preparing a seven-bead stomach-strengthening tea using pearl tea as a carrier according to claim 1, characterized in that: After the Chinese medicinal herbs are decocted and the decoctions are combined, they are first concentrated under reduced pressure to a relative density of 1.02 (55~60°C); then, a high-speed disc centrifuge at 6000-8000 r / min is used to remove suspended fine residues and plant colloidal impurities; the centrifuged and clarified filtrate is concentrated again under reduced pressure to obtain a high-purity Chinese medicinal extract with a relative density of 1.05~1.10 (55~60°C).

4. The method for preparing a seven-bead stomach-strengthening tea using pearl tea as a carrier according to claim 1, characterized in that: A water chestnut-type sugar coating machine or a high-efficiency film coating machine is used, with a machine speed of 15-30 r / min and a constant temperature of 40-50°C in the coating working chamber. The herbal paste is sprayed and coated intermittently in 8-12 batches. After each spraying, it is dried at a constant temperature of 40-50°C for 10-25 minutes. Each layer is sprayed and dried in turn. The low temperature condition inhibits the volatilization and migration of caffeine due to heat, and keeps the caffeine content of the pearl tea stable before and after spraying.

5. The method for preparing a seven-bead stomach-strengthening tea using pearl tea as a carrier according to claim 1, characterized in that: The spray coating uses a high-pressure spray gun to atomize the paste, with an atomization pressure of 0.25~0.35MPa. The paste is atomized into fine droplets, which are then evenly adhered to the surface of the pearl tea particles in a thin layer.