Combined de-enzyming production line for famous and high-quality green tea

Abstract

The invention discloses a famous high-quality green tea combined fixation production line, and belongs to the technical field of tea production. The famous high-quality green tea combined fixation production line comprises a steam generator, a normal-pressure ultrahigh-temperature humidifying hot air generating device, a pan-firing device, a cooling moisture regaining machine and a light wave fixation machine, the pan-firing device comprises a rack, a roller part is arranged on the rack and comprises a shell and a roller arranged in the shell, a feeding device for feeding tea leaves into the roller is arranged at one end of the shell, and a plurality of heating devices are arranged on the inner side of the bottom of the shell; a conveying pipe is arranged at an outlet of the normal-pressure ultrahigh-temperature humidifying hot air generating device, and the tail end of the conveying pipe extends into the roller. The pan-firing device has three thermal action modes of steam, hot air and metal medium heat conduction; through a segmented treatment mode, the fixation efficiency can be improved, and the quality of tea leaves can be effectively guaranteed. The famous high-quality green tea combined fixation production line is simple in structure, green tea fixation can be continuously carried out, and the tea fixation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tea production, and particularly relates to a combined fixation production line for famous and excellent green tea. BACKGROUND

[0002] China is the largest green tea producing and consuming country in the world. Under this background, green tea is increasingly popular with consumers due to its unique aroma, fresh taste and various health benefits. Green tea products have various forms and rich categories, and their processing technology varies with the category, but the initial processing generally includes basic processes such as fresh leaf picking, spreading, fixation, shaping and drying. Among them, fixation is the core link to form the flavor of green tea, which directly determines the appearance, aroma and taste characteristics of tea leaves.

[0003] With the continuous development of tea processing machinery, the types of fixation equipment are increasingly diverse, and the fixation methods and their effects corresponding to different equipment also have significant differences. According to the different heat sources and mechanisms, the current mainstream fixation methods can be divided into traditional pan fixation, steam fixation, microwave fixation, hot air fixation, electromagnetic fixation and far infrared fixation, etc. Each type of fixation technology has its advantages and disadvantages, and is suitable for different production scenarios and quality requirements. However, the mechanization level of tea processing in China is still lagging behind other agricultural product fields, and some production links rely on manual operation, resulting in low processing efficiency and high cost. The green tea fixation process is mostly in the single machine operation mode, and the overall production efficiency and quality stability still have a lot of room for improvement.

[0004] Famous and excellent green tea is favored by the market due to its unique appearance and excellent quality. Its fresh leaf material is mostly harvested from early spring tender buds, which are thicker and more tender than summer and autumn tea. Therefore, during fixation, it is necessary to ensure fixation through and uniformity while avoiding defects such as edge burning and popping to ensure the excellent quality of finished tea. Currently, famous and excellent green tea generally uses steam fixation or hot air fixation, but still faces a series of technical bottlenecks: hot air fixation has a high temperature, which easily leads to local edge burning of tea leaves; steam fixation has strong penetration, but poor moisture removal performance, which easily causes tea leaves to be wet and smelly, affecting the aroma; in addition, the high-pressure boiler required for steam fixation has certain safety hazards. These problems have become key factors restricting the further improvement of the processing quality of famous and excellent green tea, and need to be solved through technical optimization and equipment upgrading. SUMMARY

[0005] In view of the above prior art, the present application provides a combined fixation production line for famous and excellent green tea to solve the technical problems of low fixation efficiency and poor effect of green tea in the prior art.

[0006] In order to achieve the above object, the technical scheme adopted by the present application is to provide a famous and excellent green tea combined fixation production line, which comprises a steam generator, an atmospheric pressure ultrahigh temperature humidified hot air generating device, a frying device, a cooling and humidifying machine and a light wave fixation machine connected in sequence; the atmospheric pressure ultrahigh temperature humidified hot air generating device comprises a hot air generator, a mixing bin and an air guiding bin; the outlet of the steam generator is communicated with the mixing bin through a pipeline provided with a flow valve, and the outlet of the hot air generator is communicated with the mixing bin through a pipeline; an air guiding fan is arranged in the air guiding bin, and an inlet and an outlet are arranged at the bottom and the top of the air guiding bin respectively, the inlet is communicated with the outlet of the mixing bin through a pipeline, and a conveying pipe is arranged at the outlet; the frying device comprises a rack, a roller part is arranged on the rack, the roller part comprises an outer shell and a roller arranged in the outer shell in a rolling manner, a feeding device for feeding tea leaves into the roller is arranged at one end of the outer shell, a temperature sensor is arranged in the roller, and a plurality of heating devices are arranged on the inner side of the bottom of the outer shell along the direction of the roller; the end of the conveying pipe extends into the roller.

[0007] On the basis of the above technical scheme, the present application can also be improved as follows.

[0008] Further, the atmospheric pressure ultrahigh temperature humidified hot air generating device comprises a hot air generator, a mixing bin and an air guiding bin; the outlet of the steam generator is communicated with the mixing bin through a pipeline provided with a flow valve, and the outlet of the hot air generator is communicated with the mixing bin through a pipeline; an air guiding fan is arranged in the air guiding bin, and an inlet and an outlet are arranged at the bottom and the top of the air guiding bin respectively, the inlet is communicated with the outlet of the mixing bin through a pipeline, and a conveying pipe is arranged at the outlet.

[0009] Further, the part of the conveying pipe extending into the roller is provided with mesh holes.

[0010] Further, a guide vane plate is arranged on the inner wall of the roller.

[0011] Further, the heating devices are arranged in three, and are arranged longitudinally on the inner side of the bottom of the outer shell.

[0012] Further, the heating devices are combustion chambers taking natural gas as a combustion source.

[0013] Further, an air outlet is arranged at the top of the outer shell.

[0014] Further, the feeding device comprises a feeding hopper and a spiral feeding rod arranged at the bottom of the feeding hopper.

[0015] Further, the frying device and the cooling and humidifying machine are connected through a first chain plate elevator; the lower end of the first chain plate elevator is opposite to the discharging end of the roller, and the upper end of the first chain plate elevator is opposite to the feeding port of the cooling and humidifying machine.

[0016] Further, the cooling and humidifying machine and the light wave fixation machine are connected through a second chain plate elevator; the lower end of the second chain plate elevator is opposite to the discharging port of the cooling and humidifying machine, and the upper end of the second chain plate elevator is opposite to the feeding port of the light wave fixation machine.

[0017] The beneficial effects of this invention are: 1. The high-quality green tea combination fixation production line of the present invention has a simple structure, and the green tea fixation can be carried out continuously, thereby improving the efficiency of tea fixation.

[0018] 2. The tea leaf stir-frying device in this invention has three heat treatment methods: steam, hot air, and metal medium heat conduction. When the fresh tea leaves first enter the drum, the temperature of the leaves rises rapidly due to the combined heat conduction of the atmospheric pressure ultra-high temperature humidified hot air and the drum wall, and the enzyme activity is quickly deactivated. In the latter half of the drum, the leaves are mainly heated by the drum wall and secondarily by the atmospheric pressure ultra-high temperature humidified hot air, which continuously maintains the temperature of the material, and the enzyme activity is further deactivated. Through the segmented processing method, not only can the efficiency of stir-frying be improved, but the quality of tea can also be effectively guaranteed.

[0019] 3. As a secondary fixation device, the light wave fixation machine is used because the raw materials of famous and high-quality green tea are generally tender buds and leaves in early spring. The leaves are relatively thicker than those of late spring tea or summer and autumn tea. This fixation method can ensure that the enzyme activity inside the tea leaves is completely deactivated, and promote the further hydrolysis and transformation of the substances contained in the tea leaves during the second heat treatment. The moisture content of the fixation leaves is controlled at 47-52%, which provides a quality foundation for subsequent processing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the high-quality green tea combination fixation production line in this invention; Figure 2 A schematic diagram of a normal-pressure ultra-high temperature humidifying hot air generating device; Figure 3 This is a schematic diagram of the stir-frying device; The components include: 1. Steam generator; 2. Atmospheric pressure ultra-high temperature humidifying hot air generating device; 21. Hot air generator; 22. Mixing chamber; 23. Exhaust chamber; 24. Flow valve; 25. Inlet; 26. Outlet; 27. Conveying pipe; 3. Frying device; 31. Frame; 32. Outer shell; 33. Drum; 34. Feeding device; 341. Feeding funnel; 342. Spiral feed rod; 35. Heating device; 4. Cooling and rehumidifying machine; 5. Light wave fixing machine; 6. First chain plate elevator; 7. Second chain plate elevator. Detailed Implementation

[0021] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] In embodiments of the present invention, such as Figures 1-3 As shown, a high-quality green tea combination fixation production line is provided. The overall structure of the high-quality green tea combination fixation production line of this invention is as follows: Figure 1As shown, the device includes a steam generator 1, an atmospheric pressure ultra-high temperature humidifying hot air generating device 2, a tea-frying device 3, a cooling and rehumidifying machine 4, and a light wave tea-fixing machine 5, connected in sequence. The steam generator 1 generates high-temperature saturated steam; a steam generator from existing technology, such as a gas-fired steam generator produced by Shandong Paleyton Boiler Manufacturing Co., Ltd., can be used directly. The atmospheric pressure ultra-high temperature humidifying hot air generating device 2 mixes the steam generated by the steam generator 1 with hot air and further increases the steam temperature, thereby generating atmospheric pressure ultra-high temperature humidifying hot air for tea fixing. This ensures both the fixing effect and safety. The structural formula of the atmospheric pressure ultra-high temperature humidifying hot air generating device 2 in this invention is as follows: Figure 2 As shown, the system includes a hot air generator 21, a mixing chamber 22, and an exhaust chamber 23. The hot air generator 21 generates high-temperature dry hot air; existing hot air generators, such as those produced by Shanghai Chuwei Electromechanical Equipment Co., Ltd., can be used directly. The mixing chamber 22 provides a mixing space for the high-temperature dry hot air and high-temperature saturated steam. It is made of corrosion-resistant metal. The outlet of the steam generator 1 is connected to the mixing chamber 22 via a pipe equipped with a flow valve 24. The flow valve 24 allows for adjustable flow rates of the high-temperature saturated steam. The ratio of high-temperature dry hot air and high-temperature saturated steam is adjustable to adapt to raw materials of different tenderness, varieties and sources; the outlet of the hot air generator 21 is connected to the mixing chamber 22 through a pipe; the function of the air intake chamber 23 is to draw out the atmospheric pressure ultra-high temperature humidifying hot air generated in the mixing chamber 22 and introduce it into the pan-frying device 3 to fix the tea leaves; the mixing chamber 22 is equipped with an air intake fan, and the bottom and top are respectively equipped with an inlet 25 and an outlet 26. The inlet 25 is connected to the outlet of the mixing chamber 22 through a pipe, and the outlet 26 is equipped with a conveying pipe 27.

[0023] like Figure 3 As shown, the tea-frying device 3 of the present invention includes a frame 31; a roller component is provided on the frame 31; the roller component includes a housing 32 and a roller 33 that is rolled inside the housing 32, the rolling of the roller 33 is driven by a motor, and the driving method is similar to that of the existing roller tea-frying machine; a temperature sensor is provided inside the roller 33 to monitor the frying temperature of the tea inside the roller 33; a feeding device 34 for feeding tea into the roller 33 is provided at one end of the housing 32. In a preferred embodiment of the present invention, the feeding device 34 includes a feeding funnel 341 and a spiral feeding rod 342 provided at the bottom of the feeding funnel 341, as shown in the figure. Figure 3As shown, the feeding funnel 341 is fixed to the outer shell 32 by a fixing frame. A feeding channel is provided below the feeding funnel 341. The spiral feeding rod 342 is set inside the feeding channel. The tea leaves put into the feeding funnel 341 fall into the feeding channel and enter the drum 33 under the rotation of the spiral feeding rod 342. In order to make the tea leaves entering the drum 33 more effectively dispersed and rotated, a guide plate 37 is provided on the inner wall of the drum 33. The guide plate 37 is arranged along the longitudinal direction of the drum 33. A plurality of heating devices 35 are arranged along the direction of the roller 33 on the inner bottom side of the outer casing 32 to divide the roller 33 into different heating sections and to control the heating temperature of each heating section. In a preferred embodiment of the present invention, three heating devices 35 are provided, which are arranged longitudinally on the inner bottom side of the outer casing 32. In order to facilitate the discharge of gas generated during the heating process, an outlet is provided on the top of the outer casing 32. The heating devices 35 can be electric heating devices or gas heating devices. When a gas heating device is used, natural gas is used as the combustion source, and natural gas is burned in the combustion chamber. The combustion chamber is located on the inner bottom side of the outer casing 32. Natural gas is transported to the combustion chamber through a gas pipeline, and air is blown into the combustion chamber by a blower. The end of the conveying pipe 27 in the atmospheric pressure ultra-high temperature humidifying hot air generating device 2 extends into the inside of the drum 33, and the atmospheric pressure ultra-high temperature humidifying hot air generated by the atmospheric pressure ultra-high temperature humidifying hot air generating device 2 is introduced into the inside of the drum 33; in order to enable the atmospheric pressure ultra-high temperature humidifying hot air to be quickly and evenly distributed in the drum 33, a mesh 36 is provided in the part of the conveying pipe 27 that extends into the inside of the drum 33.

[0024] The cooling and rehumidifying machine 4 used in this invention cools and rehumidifies the tea leaves exiting the pan-frying device 3. It can directly employ existing tea cooling and rehumidifying machines, such as those produced by Chichun Machinery (Xiamen) Co., Ltd. The pan-frying device 3 and the cooling and rehumidifying machine 4 are connected by a first chain plate elevator 6; the lower end of the first chain plate elevator 6 faces the discharge end of the drum 33, and the upper end of the first chain plate elevator 6 faces the inlet of the cooling and rehumidifying machine 4.

[0025] The light wave fixation machine 5 used in this invention utilizes light energy of a specific wavelength (such as infrared, far-infrared, or microwave) to rapidly heat the tea leaves, destroying the activity of polyphenol oxidase (PPO) in the tea leaves, terminating fermentation, while preserving the color, aroma, and nutrients of the tea leaves; existing light wave fixation machines can be directly used. The cooling and rehumidifying machine 4 and the light wave fixation machine 5 are connected by a second chain plate elevator 7; the lower end of the second chain plate elevator 7 is directly opposite the discharge port of the cooling and rehumidifying machine 4, and the upper end of the second chain plate elevator 7 is directly opposite the feed port of the light wave fixation machine 5.

[0026] In the high-quality green tea processing line of this invention, during operation, the steam generator 1 produces high-temperature saturated steam, and the hot air generator 21 in the atmospheric pressure ultra-high temperature humidifying hot air generating device 2 provides high-temperature dry hot air. The high-temperature saturated steam enters the mixing chamber 22, where it is mixed with the high-temperature dry hot air in a certain proportion to form atmospheric pressure ultra-high temperature humidifying hot air. The atmospheric pressure ultra-high temperature humidifying hot air is then conveyed into the drum 33 via the air intake chamber 23 and the conveying pipe 27. Fresh tea leaves are fed into the drum 33 from the feeding device 34, and are conveyed into the drum 33 by the spiral feeding rod 342 with spiral blades. The leaves move in a circular and falling motion along the drum wall and the guide plate 37, and are gradually conveyed to the discharge port.

[0027] There are three heating methods inside the drum 33: steam, hot air, and metal medium heat conduction. A conveying pipe 37 with a mesh structure 36 is located at the front end of the drum 33. The atmospheric pressure ultra-high temperature humidifying hot air output here interacts rapidly with the fresh leaves entering the drum 33. The fresh leaves are heated by the combined heat conduction from the steam, hot air, and the drum wall, causing the leaf temperature to rise rapidly and the enzyme activity to be quickly deactivated. The drum wall is heated by a three-stage combustion flame at the bottom. In the latter half of the drum 33, the fresh leaves are mainly heated by the drum wall, and secondarily by the atmospheric pressure ultra-high temperature humidifying hot air, continuously maintaining the material temperature and further deactivating the enzymes, completing the first stage of blanching.

[0028] After exiting the drum 33, the leaves are conveyed to the cooling and rehydration machine 4 via the first chain plate elevator 6. After sufficient cooling and rehydration, the blanched leaves are transferred to the second chain plate elevator 7. The blanched leaves are then conveyed into the light wave blanching machine 5 via the chain plate. The heat radiated by the blanching process and the specific wavelength and intensity of the light inside the machine heats the material from the inside out. As the material temperature rises, the enzyme activity is deactivated, and the second stage of blanching is completed.

[0029] Although specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims are still within the scope of protection of this patent.

Claims

1. A production line for processing high-quality green tea using a combination of methods, characterized in that: The system includes a steam generator (1), an atmospheric pressure ultra-high temperature humidifying hot air generating device (2), a pan-frying device (3), a cooling and rehumidifying machine (4), and a light wave pan-frying machine (5) connected in sequence. The atmospheric pressure ultra-high temperature humidifying hot air generating device (2) includes a hot air generator (21), a mixing chamber (22), and an exhaust chamber (23). The outlet of the steam generator (1) is connected to the mixing chamber (22) through a pipe with a flow valve (24), and the outlet of the hot air generator (21) is connected to the mixing chamber (22) through a pipe. An exhaust fan is installed inside the exhaust chamber (23), and an inlet (25) and an outlet (26) are respectively provided at the bottom and top. The mixing chamber (22) is connected to the outlet of the mixing chamber (22) through a pipe, and a conveying pipe (27) is provided at the outlet (26); the tea-frying device (3) includes a frame (31), and a roller component is provided on the frame (31). The roller component includes a shell (32) and a roller (33) that is rolled inside the shell (32). A feeding device (34) for feeding tea into the roller is provided at one end of the shell (32). A temperature sensor is provided inside the roller. Several heating devices (35) are arranged along the direction of the roller (33) on the inner side of the bottom of the shell (32); the end of the conveying pipe (27) extends into the inside of the roller (33).

2. The high-quality green tea combination fixation production line according to claim 1, characterized in that: The portion of the conveying pipe (27) that extends into the drum (33) is provided with a mesh (36).

3. The high-quality green tea combination fixation production line according to claim 1, characterized in that: The inner wall of the roller (33) is provided with a guide vane (37).

4. The production line for processing premium green tea according to claim 1, characterized in that: The heating device (35) is provided in three parts, arranged longitudinally on the inner side of the bottom of the outer casing (32).

5. The production line for processing premium green tea according to claim 1 or 4, characterized in that: The heating device (35) is a combustion chamber that uses natural gas as the combustion source.

6. The high-quality green tea combination fixation production line according to claim 1, characterized in that: An air vent is provided on the top of the outer casing (32).

7. The high-quality green tea combination fixation production line according to claim 1, characterized in that: The feeding device (34) includes a feeding funnel (341) and a spiral feeding rod (342) disposed at the bottom of the feeding funnel (341).

8. The high-quality green tea combination fixation production line according to claim 1, characterized in that: The stir-frying device (3) and the cooling and rehydration machine (4) are connected by a first chain plate elevator (6); the lower end of the first chain plate elevator (6) is directly opposite the discharge end of the roller (33), and the upper end of the first chain plate elevator (6) is directly opposite the feed inlet of the cooling and rehydration machine (4).

9. The high-quality green tea combination fixation production line according to claim 1, characterized in that: The cooling and rehydration machine (4) and the light wave blanching machine (5) are connected by a second chain plate elevator (7); the lower end of the second chain plate elevator (7) is directly opposite the discharge port of the cooling and rehydration machine (4), and the upper end of the second chain plate elevator (7) is directly opposite the feed port of the light wave blanching machine (5).

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