Tea preparation method adopting heat bonding process
By preheating the raw material powder and adding a soluble binder, combined with stirring and air cooling, the problem of tea granule sticking was solved, the tea granule forming rate and granulation efficiency were improved, and the heat requirement was reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HANGZHOU YUNTIAN CULTURE MEDIA CO LTD
- Filing Date
- 2023-11-23
- Publication Date
- 2026-04-17
AI Technical Summary
In existing thermal bonding processes for tea preparation, tea particles tend to stick together, resulting in a low forming rate.
The raw material powder is preheated and mixed with soluble binder powder and water. The mixture is heated and stirred to form a clump of raw material. It is then cut into granules during the stirring process and cooled and solidified by an air-cooled unit to avoid high-temperature sticking.
It improves the forming rate and granulation efficiency of tea granules, and reduces the heat demand and power consumption during the granulation process.
Smart Images
Figure CN121867304A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of tea granulation technology, and particularly relates to a tea preparation method using a thermal bonding process. Background Technology
[0002] Granulated tea is a modern and convenient form of tea. It is made by crushing, screening, and pressing raw tea leaves into granules using a machine, followed by high-temperature sterilization and drying. Granulated tea mainly includes green tea, black tea, and oolong tea. Different types of granulated tea have different tastes and nutritional components. There are various methods for preparing tea granules, including airflow dry granulation, reverse wet granulation, and thermal bonding granulation, etc.
[0003] Existing thermal bonding processes for tea preparation typically involve adding prepared tea raw materials, a small amount of granulation solution, and water to a granulation device. The mixture is then stirred at high temperatures to agglomerate the materials. The granulation device then cuts the agglomerated raw materials into wet granules while stirring them. The wet granule preparation process requires a large amount of heat, and excessively high temperatures may cause the wet granules to solidify slowly, inevitably leading to sticking between the wet granules and reducing the tea granule forming rate. This process needs to be improved.
[0004] Therefore, a tea preparation method using a thermal bonding process is proposed. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a method for preparing hot-bonded tea leaves that can reduce the sticking between tea particles during the granulation process and improve the tea particle forming rate.
[0006] To achieve the above objectives, the present invention adopts the following technical solution, comprising the following steps: S1: Pick fresh tea leaves, various edible flowers, fruits and grains as raw materials, remove impurities from the raw materials and perform fixation; S2: Raw materials are added to a dryer for drying, and the dried raw materials are then added to a screening machine for screening. S3: Weigh the required raw material powders according to the proportions and put them into the heating mixer. Start the heating mixer to mix the raw material powders and heat them. S4: Add preheated raw material powder, soluble binder powder in proportion to the raw material powder, and water to the granulation device in sequence. Stir and mix the soluble binder powder and the raw material powder. During the mixing process, the soluble binder powder melts. The raw material powder, binder solution, and water are stirred and mixed into a ball. Then, the ball of raw material is stirred and cut into granules by the granulation device. Particles that meet the size are screened out through a sieve. S5: The granules fall onto the automatic granulator for granulation. After granulation, they are cooled and solidified by an air-cooling unit. After air-cooling and solidification, they are screened by a screening machine to remove unformed granules. After screening, they are made into finished granules.
[0007] Preferably, in step S2, the moisture content of the raw material is less than 5% after drying in the dryer, and after screening, the raw material is conveyed to the pulverizer and pulverized into powder with a diameter of 0.1-0.2 mm.
[0008] Preferably, in step S3, the heating mixer mixes the raw materials at a speed of 220-250 r / min for 5-8 min and heats them, with the raw material powder temperature preheating range set at 70-80℃.
[0009] Preferably, in S4, the granulation device is a GHL-10 high-shear granulator.
[0010] Preferably, in step S4, the soluble binder powder has a melting point of 60°C, the soluble binder powder and the raw material powder are stirred and mixed at a speed of 220-250 r / min for 3-5 min, the raw material powder, binder solution and water are stirred and mixed for 2-3 min, and the granulation device stirs and cuts the lumpy raw material into particles with a diameter of 10 mm.
[0011] Preferably, in step S5, the cooling temperature of the air-cooled unit is controlled between 10 and 25°C.
[0012] In summary, compared with the prior art, the beneficial effects of the present invention are as follows: Raw material powder is added to a heating mixer for preheating. After preheating, the raw material powder, soluble binder powder, and water are sequentially added to a granulation device. The raw material powder and soluble binder powder are thoroughly mixed. The heat carried by the raw material powder melts the soluble binder powder into a binder solution. During the stirring process, the raw material powder, binder solution, and water form clumps of raw material, which are then gradually cooled, causing the clumps to initially solidify. The initially solidified clumps are then cut into tea granules by the granulation device during stirring. The tea granules at this stage do not exhibit softness or stickiness, thus improving the tea granule forming rate and granulation efficiency. Furthermore, the granulation process does not require a large amount of heat or heat regulation equipment, effectively reducing granulation power consumption. Attached Figure Description
[0013] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation
[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0015] Please see Figure 1 The present invention provides a technical solution comprising the following steps: 1. A method for preparing tea using a thermal bonding process, characterized by comprising the following steps: S1: Pick fresh tea leaves, various edible flowers, fruits and grains as raw materials, remove impurities from the raw materials and perform fixation; S2: Raw materials are added to a dryer for drying, and the dried raw materials are then added to a screening machine for screening. S3: Weigh the required raw material powders according to the proportions and put them into the heating mixer. Start the heating mixer to mix the raw material powders and heat them. S4: Add preheated raw material powder, soluble binder powder in proportion to the raw material powder, and water to the granulation device in sequence. Stir and mix the soluble binder powder and the raw material powder. During the mixing process, the soluble binder powder melts. The raw material powder, binder solution, and water are stirred and mixed into a ball. Then, the ball of raw material is stirred and cut into granules by the granulation device. Particles that meet the size are screened out through a sieve. S5: The granules fall onto the automatic granulator for granulation. After granulation, they are cooled and solidified by an air-cooling unit. After air-cooling and solidification, they are screened by a screening machine to remove unformed granules. After screening, they are made into finished granules.
[0016] In step S2, the raw materials are dried in the dryer and the moisture content is less than 5%. After screening, the raw materials are conveyed to the pulverizer and pulverized into powder with a diameter of 0.1-0.2 mm.
[0017] In step S3, the heating mixer mixes the raw materials at a speed of 220-250 r / min for 5-8 min and heats them, with the raw material powder temperature preheating range set at 70-80℃.
[0018] In S4, the granulation device is a GHL-10 high-shear granulator.
[0019] In step S4, the soluble binder powder has a melting point of 60°C. The soluble binder powder and the raw material powder are stirred and mixed at a speed of 220-250 r / min for 3-5 min. The raw material powder, binder solution and water are stirred and mixed for 2-3 min. The granulation device stirs and cuts the lumpy raw material into particles with a diameter of 10 mm.
[0020] In S5, the cooling temperature of the air-cooled unit is controlled between 10 and 25°C.
[0021] Working Principle: Fresh tea leaves, as well as various edible flowers, fruits, and grains, are harvested as raw materials. Impurities are removed, and the raw materials undergo a blanching process to inhibit enzyme activity, stop fermentation, and preserve their unique color. The raw materials are then dried in a dryer until the moisture content is below 5%, which enhances the aroma. After drying, the raw materials are screened to remove foreign matter. The screened raw materials are then fed into a pulverizer to be pulverized into powder with a diameter of 0.1-0.2 mm. The required amount of raw material powder is weighed according to the specified ratio and fed into a heating mixer. The heating mixer mixes the raw material powder at a speed of 220-250 r / min for 5-8 minutes while heating it to a preheated temperature of 70-80℃. The preheated raw material powder, a soluble binder powder in proportion to the raw material powder, and water are then added sequentially to the granulation device. The agent powder and raw material powder are stirred and mixed at a speed of 220-250 r / min for 3-5 minutes to fully mix the raw material powder and soluble binder powder. During the mixing process, the heat carried by the raw material powder melts the soluble binder powder into a binder solution. The raw material powder, binder solution and water are stirred and mixed for 2-3 minutes to form clumps of raw material. The clumps of raw material are gradually cooled during the mixing process, so that the clumps of raw material initially coagulate. The initially coagulated clumps of raw material are stirred and cut into granules with a diameter of 10 mm by a granulation device during the stirring process. At this time, the tea granules are not completely coagulated, but they will not be soft or sticky. The tea granules are automatically fed and screened through a screen to select tea granules that meet the size. The tea granules fall into an automatic granulation machine for granulation. After granulation, they are cooled and solidified by an air-cooling unit. After solidification, they are screened by a screening machine to separate out the unformed granules and then screened to produce finished granules.
[0022] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A tea leaf manufacturing method using a thermal bonding process, characterized by, Includes the following steps: S1: Pick fresh tea leaves, various edible flowers, fruits and grains as raw materials, remove impurities from the raw materials and perform fixation; S2: Raw materials are added to a dryer for drying, and the dried raw materials are then added to a screening machine for screening. S3: Weigh the required raw material powders according to the proportions and put them into the heating mixer. Start the heating mixer to mix the raw material powders and heat them. S4: Add preheated raw material powder, soluble binder powder in proportion to the raw material powder, and water to the granulation device in sequence. Stir and mix the soluble binder powder and the raw material powder. During the mixing process, the soluble binder powder melts. The raw material powder, binder solution, and water are stirred and mixed into a ball. Then, the ball of raw material is stirred and cut into granules by the granulation device. Particles that meet the size are screened out through a sieve. S5: The granules fall onto the automatic granulator for granulation. After granulation, they are cooled and solidified by an air-cooling unit. After air-cooling and solidification, they are screened by a screening machine to remove unformed granules. After screening, they are made into finished granules.
2. The tea preparation method using a thermal bonding process according to claim 1, characterized in that, In step S2, the raw materials are dried in the dryer and the moisture content is less than 5%. After screening, the raw materials are conveyed to the pulverizer and pulverized into powder with a diameter of 0.1-0.2 mm.
3. The tea leaf preparation method using a thermal bonding process according to claim 1, characterized in that, In step S3, the heating mixer mixes the raw materials at a speed of 220-250 r / min for 5-8 min and heats them, with the raw material powder temperature preheating range set at 70-80℃.
4. The tea leaf preparation method using a thermal bonding process according to claim 1, characterized in that, In S4, the granulation device is a GHL-10 high-shear granulator.
5. The method for preparing tea using a thermal bonding process according to claim 1, characterized in that, In step S4, the soluble binder powder has a melting point of 60°C. The soluble binder powder and the raw material powder are stirred and mixed at a speed of 220-250 r / min for 3-5 min. The raw material powder, binder solution and water are stirred and mixed for 2-3 min. The granulation device stirs the agglomerated raw material and cuts it into particles with a diameter of 10 mm.
6. The tea leaf preparation method using a thermal bonding process according to claim 1, characterized in that, In S5, the cooling temperature of the air-cooled unit is controlled between 10 and 25°C.