Liupu tea steaming device and processing method

Abstract

The invention relates to the technical field of Liupao tea processing, and particularly discloses a Liupao tea steaming device and a processing method. Comprising a device body, and the device body comprises a preheating humidifying chamber, a heating humidifying chamber and a high-temperature cooking chamber; chain net conveying belts are arranged in the preheating humidifying chamber, the heating humidifying chamber and the high-temperature cooking chamber respectively, tea leaves are conveyed through the chain net conveying belts, and the tea leaves are humidified and heated in the conveying process; a Liupao tea steaming processing method comprises the following steps: (1) firstly feeding tea leaves to be steamed into a preheating humidifying chamber, and maintaining the humidity to be 80% or above and the temperature to be 40 DEG C or below; (2) transferring the tea leaves treated in the step (1) into the heating and humidifying chamber, and maintaining the temperature at 50-80 DEG C; and (3) transferring the tea leaves treated in the step (2) into the high-temperature cooking chamber, and maintaining the temperature to be 90 DEG C or above. The method has the advantages that the steaming effect of the Liupao tea is remarkably improved, the processing quality of the Liupao tea is remarkably improved, and the like.

Description

Technical Field

[0001] The invention relates to the technical field of Liubao tea processing, and in particular to a Liubao tea steaming device and a processing method. Background Art

[0002] Liubao tea belongs to the category of black tea, and has the unique qualities of "red, thick, aged, and mellow". Steaming is one of the production process steps of Liubao tea. Specifically, the functions of steaming include: 1. Stimulating aroma. Steaming can open the cell structure of tea leaves, making it easier to release the aromatic substances in them, thereby enhancing the aroma of tea leaves; 2. Improving taste. Steaming can promote the transformation of substances contained in tea leaves. Through the action of moisture and heat, some components in tea leaves undergo chemical changes, improving the taste of tea soup and making it smoother and mellower; 3. Sterilization and disinfection. Steaming can kill bacteria and microorganisms on the surface of tea leaves and improve the hygiene and safety of tea leaves; 4. Stabilizing quality. Steaming can remove certain impurities and odors in tea leaves, making the quality of tea leaves more stable and consistent. This change not only improves the aroma and taste of tea leaves, but also forms the unique quality characteristics of "red, thick, aged, and mellow" of Liubao tea. At the same time, steaming also has an important impact on the preservation and aging of Liubao tea. In general, steaming is an important link in the production process of Liubao tea, which can significantly improve the overall quality of tea leaves. In the ancient method of making traditional Liubao tea, there is the following record about the steaming process: "At the beginning of making Liubao tea, two large copper pots about 1.3 meters * 1.5 meters deep and 0.5 meters are used, covered with a whole board mold, four holes with a diameter of 60.5 centimeters are opened, and four wooden steamers are used to hold tea. Water is put in the copper pot, and firewood is burned to heat the water and boil it at any time." Compared with the existing Liubao tea, the traditional Liubao tea has its own unique taste. The difference in its steaming process is mainly that in traditional steaming, firewood is used to gradually increase the temperature in the pot and generate high-temperature water vapor; while the steaming process of existing equipment is to directly introduce high temperature, that is, the heating is instantaneous. In view of the drawbacks of existing tea steaming machines, such as CN118177261A, a Liubao tea steaming processing device and steaming process, there is the following disclosure: "The existing tea steaming machine includes a cylinder and a cylinder cover. A steam inlet is provided at the bottom of the cylinder. The tea leaves after preliminary processing are placed in the cylinder, and then the cylinder cover is covered. High-temperature steam evaporates from bottom to top to steam the tea leaves. However, in production practice, it is difficult to uniformly control the maturity of the tea leaves in the entire cylinder using the existing tea steaming machine, because the cylinder cavity is a vertical cylindrical structure, and the steam evaporates from bottom to top, which will result in the tea leaves at the bottom of the cylinder reaching the required maturity while the tea leaves on the upper layer are still in a half-cooked state. To ensure that the tea leaves on the upper layer reach the required maturity, the tea leaves on the lower layer will be "overripe", that is, the maturity of the tea leaves in a cylinder will be inconsistent, which will affect the taste and quality of the entire batch of tea leaves."

[0003] In summary, the existing industrial Liubao tea steaming equipment has the following problems: 1. Direct introduction of high-temperature steam causes instantaneous high-temperature changes, and the tea leaves in the cylinder of the tea steamer cannot achieve a slow heating process similar to the traditional process; 2. The tea leaves in the cylinder have different degrees of maturity between the upper and lower layers, which affects the quality of the tea leaves. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a Liubao tea steaming device and a processing method, which can achieve a slow increase in the temperature of the tea leaves during the steaming process and a consistent degree of ripening of the same batch of tea leaves.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A Liubao tea steaming device comprises a device body, wherein the device body comprises a preheating and humidifying chamber, a heating and humidifying chamber and a high-temperature cooking chamber; the preheating and humidifying chamber, the heating and humidifying chamber and the high-temperature cooking chamber are respectively provided with chain mesh conveyor belts, tea leaves are conveyed by the chain mesh conveyor belts, and the tea leaves are humidified and heated during the conveying process; the temperature of the preheating and humidifying chamber is lower than the temperature of the heating and humidifying chamber; the temperature of the heating and humidifying chamber is lower than the temperature of the high-temperature cooking chamber; the chain mesh conveyor belt in the preheating and humidifying chamber conveys the tea leaves to the chain mesh conveyor belt of the heating and humidifying chamber; the chain mesh conveyor belt of the heating and humidifying chamber conveys the tea leaves to the chain mesh conveyor belt of the high-temperature cooking chamber; the preheating and humidifying chamber and / or the heating and humidifying chamber and / or the high-temperature cooking chamber are respectively provided with temperature and humidity sensing modules.

[0007] Optionally, a feed hopper is provided above the preheating and humidifying chamber, and a first valve is provided at a discharge port of the feed hopper.

[0008] Optionally, a second discharge port is provided between the preheating humidification chamber and the heating humidification chamber; and a second valve is provided at the second discharge port.

[0009] Optionally, a third material discharge port is provided between the heating and humidifying chamber and the high-temperature cooking chamber; and a third valve is provided at the third material discharge port.

[0010] Optionally, a water tank is provided at the lower part of the high-temperature cooking chamber, and a heating device is provided in the water tank.

[0011] Optionally, a tea drain bucket is provided on one side of the high-temperature cooking chamber, and the tea drain bucket is arranged above the water tank.

[0012] Optionally, a discharge port is provided on the outer side of the tea drain bucket, and a fourth valve is provided at the discharge port.

[0013] Optionally, the preheating and humidifying chamber, the heating and humidifying chamber and the high-temperature cooking chamber are respectively provided with an air pressure control component, and the air pressure control component includes a pressure relief valve and a safety air valve.

[0014] Optionally, a high-temperature mist mixer is provided in the preheating humidification chamber and / or the heating humidification chamber and / or the high-temperature cooking chamber; the high-temperature mist mixer comprises a mixer body, a cavity is provided in the mixer body, and an inner mesh layer and an outer mesh layer are provided in the cavity; the inner mesh layer separates the cavity into an inner chamber; a mixing chamber is formed between the outer mesh layer and the inner mesh layer; an outer chamber is formed between the outer mesh layer and the outer shell of the mixer body; a plurality of air outlets are provided on the outer shell of the mixer body; a heating pipe is provided in the mixer body; a water mist delivery pipe is provided in the inner chamber; a gas delivery pipe is provided in the inner chamber and / or the outer chamber.

[0015] A Liubao tea steaming processing method, using the Liubao tea steaming device as described above, comprises the following steps:

[0016] (1) sending the tea leaves to be steamed into the preheating and humidifying chamber to maintain the humidity above 80% and the temperature below 40° C.;

[0017] (2) passing the tea leaves after step (1) into the heating and humidifying chamber and maintaining the temperature at 50-80° C.;

[0018] (3) The tea leaves after step (2) are then introduced into the high-temperature cooking chamber and the temperature is maintained above 90° C.

[0019] The beneficial effects of the present invention compared with the prior art are as follows:

[0020] The present invention divides the steaming of tea leaves into three stages: a preheating humidification chamber, a heating humidification chamber and a high-temperature steaming chamber, thereby solving the problem that the existing tea steaming machine directly causes instantaneous high temperature in the chamber through high-temperature steam, and is unable to realize the simulation of the traditional gradually heating tea steaming process; at the same time, the tea leaves are dynamically steamed in a flat manner by adopting a transmission chain mesh conveyor belt, which significantly improves the uniformity of the tea leaves' heating and humidification process and the high-temperature steaming process, solves the problem of uneven maturity of the upper and lower layers of the existing tea steaming machine, and significantly improves the quality of steamed tea leaves. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a partial top view of the preheating and humidifying chamber of the present invention;

[0023] Figure 3 is a cross-sectional view of the high-temperature mist mixer of the present invention;

[0024] Figure 4It is a longitudinal sectional view of the high-temperature mist mixer of the present invention. DETAILED DESCRIPTION

[0025] The above content is a detailed description of this patent in combination with specific implementation methods, and it cannot be determined that the specific implementation methods of this patent are limited to the above description. For ordinary technicians in the technical field to which this patent belongs, without departing from the concept of this patent, several substitutions or modifications made to the above-described implementation methods should be deemed to belong to the protection scope of this patent. In the description of this specification, in this specification, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In the absence of contradictions, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made herein without departing from the scope of protection of the patent application.

[0026] like Figures 1 to 4 As shown, a Liubao tea steaming device comprises a device body 1, and the device body 1 comprises a preheating and humidifying chamber 25, a heating and humidifying chamber 21 and a high-temperature cooking chamber 12 in sequence from top to bottom; chain mesh conveyors are respectively arranged in the preheating and humidifying chamber 25, the heating and humidifying chamber 21 and the high-temperature cooking chamber 12, and the chain mesh conveyors of the upper and lower layers run in opposite directions, and are respectively provided with a sprocket 2 and driven by the sprocket 2 to drive the chain mesh conveyors to move slowly; in this embodiment, a first chain mesh conveyor 31 is arranged in the preheating and humidifying chamber 25, and the heating and humidifying chamber 21 is provided with two layers, a second chain mesh conveyor 5 is arranged in the first layer of the heating and humidifying chamber, and a third chain mesh conveyor 6 is arranged in the second layer of the heating and humidifying chamber; the first layer of the heating and humidifying chamber is arranged above the second layer of the heating and humidifying chamber, and a material drop port 19 is arranged between each other; a fourth chain mesh conveyor 9 is arranged in the high-temperature cooking chamber 12; Figure 2 As shown, the first chain mesh conveyor belt 31 includes a stainless steel mesh chain 33. The stainless steel mesh chain 33 has the advantages of being breathable and not easy to rust. The pitch may preferably be a high-density stainless steel mesh chain of 1 to 3 mm. In this embodiment, in order to improve the conveying level of the chain mesh conveyor belt, a rolling support rod 30 may also be provided thereunder.

[0027] The tea leaves are conveyed by the chain mesh conveyor belt, and the tea leaves are humidified and heated during the conveying process; the temperature of the preheating and humidifying chamber is lower than the temperature of the heating and humidifying chamber; the temperature of the heating and humidifying chamber is lower than the temperature of the high-temperature cooking chamber; the chain mesh conveyor belt in the preheating and humidifying chamber conveys the tea leaves to the chain mesh conveyor belt of the heating and humidifying chamber; the chain mesh conveyor belt of the heating and humidifying chamber conveys the tea leaves to the chain mesh conveyor belt of the high-temperature cooking chamber; the preheating and humidifying chamber and / or the heating and humidifying chamber and / or the high-temperature cooking chamber are respectively provided with temperature and humidity sensing modules.

[0028] Optionally, a feed hopper 27 is provided above the preheating and humidifying chamber, and a first valve 28 is provided at the discharge port of the feed hopper 27. In the present embodiment, the first valve 28 is preferably a plate-shaped lifting valve controlled by a telescopic cylinder, because the discharge port of the feed hopper 27 is a rectangular structure (to facilitate the dispersion of tea leaves onto the chain conveyor belt), and the use of a plate-shaped lifting valve has better reliability.

[0029] Optionally, a first material storage hopper 3 is provided between the preheating and humidifying chamber 25 and the heating and humidifying chamber 21, and a second material discharge port is provided at the lower end of the first material storage hopper 3; a second valve 4 is provided at the second material discharge port, and the second valve 4 adopts a structure similar to the first valve 28. The first material storage hopper 3 is provided for: 1. It can retain the tea leaves that have been preheated and humidified, so as to make the temperature of the tea leaves and the inside and outside of the tea leaves more uniform, and further fully absorb the water mist; 2. The second valve 4 is intermittently opened and closed. When in use, it is necessary to wait for the tea leaves entering the heating and humidifying chamber 21 to be under constant pressure, temperature, and humidity for a sufficient period of time, and after the tea leaves are transferred downward, the second valve 4 is opened to discharge the tea leaves and process the second batch.

[0030] In this embodiment, the heating and humidifying chamber 21 is provided with two layers, the heating and humidifying chamber 21 is provided above the first layer of heating and humidifying chamber, and a second storage hopper 7 is provided between the second layer of heating and humidifying chamber and the high temperature cooking chamber 12, and a third material discharge port is provided at the lower end of the second storage hopper 7; a third valve 8 is provided at the third material discharge port, and the third valve 8 is similar to the structure of the first valve 28. The function of the second storage hopper 7 is similar to that of the first storage hopper 3.

[0031] Optionally, a water tank 12-1 is provided at the lower part of the high-temperature cooking chamber 12, and a heating device 10 is provided in the water tank 12-1 for providing high-temperature steam to cook the tea leaves at high temperature.

[0032] Optionally, a tea drain bucket 17 is provided on one side of the high-temperature steaming chamber 12. The tea drain bucket 17 is provided above the water tank 12-1 and is used to hold tea leaves conveyed by the fourth chain mesh conveyor belt 9 and facilitate batch discharge. In order to facilitate the discharge of tea leaves, in this embodiment, the bottom surface of the tea drain bucket 17 is set to be inclined and a stainless steel stamping mesh plate is used. In this embodiment, because the preheating humidification chamber 25 and the heating humidification chamber 21 will have condensed water, a liquid outlet 32 ​​can be provided on one side of the bottom thereof respectively. The condensed water flows out through the liquid outlet 32 ​​and flows back to the water tank 12-1 through the water delivery pipe 32 (provided in the pipeline storage chamber 34). In order to reduce the fluctuation of air pressure between the steaming chambers, a U-shaped pipe can be provided on the upper part of the water delivery pipe 32, and its bottom is buried below the liquid level of the water tank 12-1. In this embodiment, the water tank 12 - 1 is provided with a wastewater drainage pipe, and a valve 35 is provided on the wastewater drainage pipe.

[0033] Optionally, a discharge port 14 is provided on the outside of the tea drain bucket 17, and a fourth valve is provided at the discharge port 14. The fourth valve adopts a structure similar to the first valve 28, including a telescopic cylinder 16 and a sealing swing cover plate 15. In this embodiment, a discharge channel 13 is provided below the outside of the discharge port 14. To improve the sealing performance, a sealing rubber ring can be provided on the inner outer edge of the sealing swing cover plate 15 of the fourth valve, and the pressing force is provided by the telescopic cylinder 16. At the same time, in order to improve the pressure resistance, a device similar to a tower buckle can be added to improve the reliability of the sealing swing cover plate 15 in resisting the internal air pressure.

[0034] Optionally, the preheating humidification chamber, the first layer heating humidification chamber, the second layer heating humidification chamber and the high temperature cooking chamber are respectively provided with a first air pressure control component 26, a second air pressure control component 24, a third air pressure control component 20 and a fourth air pressure control component 18, and the air pressure control component includes a pressure gauge, a pressure relief valve 22 and a safety air valve 23. The pressure relief valve 22 is used to relieve the pressure when the internal pressure is higher than the set pressure.

[0035] Optionally, a high-temperature mist mixer 29 is provided in the preheating humidification chamber and / or the heating humidification chamber and / or the high-temperature cooking chamber; Figures 3-4As shown, the high-temperature mist mixer includes a mixer body, the mixer body is arranged in a cylindrical structure, a cavity is arranged inside, the cavity is arranged with an inner mesh layer 38 and an outer mesh layer 40, the outer parts of the inner mesh layer 38 and the outer mesh layer 40 are respectively cylindrical structures, that is, cylindrical structures with cavities inside, and the two sides are respectively fixed to the inner side wall of the mixer body during preparation; the inner mesh layer 38 divides the cavity into an inner chamber 37; the outer mesh layer 40 and the inner mesh layer 38 form a mixing chamber 39; the outer mesh layer 40 and the mixing An outer chamber 41 is formed between the outer shells of the mixer body; a plurality of air outlets 42 are arranged on the outer shell of the mixer body; a heating tube 43 is arranged in the mixer body, and the heating tube 43 is fixed to the inner cavity of the mixer body through a connecting frame; a water mist delivery tube 44 is arranged in the inner chamber 37; a first gas delivery tube 45 and a second gas delivery tube 46 are respectively arranged in the inner chamber and the outer chamber. In the present embodiment, the first gas delivery tube 45 and the second gas delivery tube 46 are commonly connected to the total air inlet chamber 47, and the total air inlet chamber 47 is connected to the gas delivery tube 48. When in use, the water mist delivery pipe 44 is connected to the mist outlet of the ultrasonic atomizing device through the atomized water vapor delivery pipe 36; a one-way valve is provided on the atomized water vapor delivery pipe 36 to prevent the airflow from flowing back (that is, after the high-temperature air valve is opened, the high-pressure drive causes the one-way valve to close to prevent the airflow from flowing back), and a high-temperature air valve (not shown) is provided on the air delivery pipe 48, and the air delivery pipe 48 is connected to the air outlet of the high-temperature air pump; its principle is: by passing the atomized water vapor into the inner chamber 37, the atomized water vapor is heated and expanded by the high temperature, and at the same time , high-temperature air passes into the inner chamber 37 and the outer chamber 41. Because there are fewer air outlet holes 42, part of the high-temperature gas in the outer chamber 41 is forced to flow toward the mixing chamber 39, while the high-temperature gas in the inner chamber 37 flows toward the mixing chamber 39, thereby causing the atomized water vapor in the inner chamber 37 to quickly enter the mixing chamber 39 and be fully mixed with the high-temperature gas, and finally be ejected from the air outlet holes 42. The full mixing of the high-temperature gas and the atomized water vapor can improve the humidification and penetration effect on the tea leaves, reduce energy consumption, and improve the steaming effect.

[0036] The advantage of using the high-temperature mist mixer 29 compared to the traditional direct access to high-temperature water vapor is that it can adapt to the processing technology of this device and make the water mist temperature adjustable. The steam of the traditional steam engine is generally around 120 degrees Celsius, and the water vapor temperature cannot be effectively regulated. The 120-degree Celsius water vapor temperature is lowered and directly condensed, but constant-temperature water mist with sufficient water vapor cannot be obtained. The present device controls the air temperature and uses ultrasonic atomization to provide water mist, and through the efficient mixing of the present device, provides constant-temperature and sufficient water mist for the preheating humidification chamber, the heating humidification chamber, etc.

[0037] A Liubao tea steaming processing method, using the Liubao tea steaming device as described above, comprises the following steps:

[0038] (1) The tea leaves to be steamed are first sent into the preheating and humidifying chamber to maintain the humidity above 80% and the temperature below 40° C. This is achieved by controlling the temperature of the air of the relevant high-temperature air pump.

[0039] (2) The tea leaves after step (1) are then introduced into the heating and humidifying chamber, and the temperature is maintained at 50-80° C.; the temperature of the air of the relevant high-temperature air pump is controlled to achieve

[0040] (3) The tea leaves after step (2) are then introduced into the high temperature steaming chamber and maintained at a temperature above 90°C, preferably above 100°C, by controlling the temperature of the air of the relevant high temperature air pump. That is, in the high temperature steaming chamber, the high temperature mist mixer 29 may not be used, but the heating device 10 provided in the water tank 12-1 may be directly used to directly boil the tea leaves to achieve steaming.

Claims

1. A Liubao tea steaming device, characterized in that: The invention comprises a device body, which comprises a preheating and humidifying chamber, a heating and humidifying chamber and a high-temperature cooking chamber; the preheating and humidifying chamber, the heating and humidifying chamber and the high-temperature cooking chamber are respectively provided with chain mesh conveyor belts, tea leaves are conveyed by the chain mesh conveyor belts, and the tea leaves are humidified and heated during the conveying process; the temperature of the preheating and humidifying chamber is lower than the temperature of the heating and humidifying chamber; the temperature of the heating and humidifying chamber is lower than the temperature of the high-temperature cooking chamber; the chain mesh conveyor belt in the preheating and humidifying chamber conveys the tea leaves to the chain mesh conveyor belt of the heating and humidifying chamber; the chain mesh conveyor belt of the heating and humidifying chamber conveys the tea leaves to the chain mesh conveyor belt of the high-temperature cooking chamber; the preheating and humidifying chamber and / or the heating and humidifying chamber and / or the high-temperature cooking chamber are respectively provided with temperature and humidity sensing modules.

2. The Liubao tea steaming device according to claim 1, characterized in that: A feed hopper is arranged above the preheating and humidifying chamber, and a first valve is arranged at a discharge port of the feed hopper.

3. The Liubao tea steaming device according to claim 1, characterized in that: A second material discharge port is provided between the preheating humidification chamber and the heating humidification chamber; a second valve is provided at the second material discharge port.

4. The Liubao tea steaming device according to claim 1, characterized in that: A third material discharge port is arranged between the heating and humidifying chamber and the high-temperature cooking chamber; and a third valve is arranged at the third material discharge port.

5. The Liubao tea steaming device according to claim 1, characterized in that: A water tank is arranged at the lower part of the high-temperature cooking chamber, and a heating device is arranged in the water tank.

6. The Liubao tea steaming device according to claim 1, characterized in that: A tea leaf drain bucket is arranged on one side of the high-temperature cooking chamber, and the tea leaf drain bucket is arranged above the water tank.

7. The Liubao tea steaming device according to claim 6, characterized in that: A discharge port is arranged on the outer side of the tea drain bucket, and a fourth valve is arranged at the discharge port.

8. The Liubao tea steaming device according to claim 1, characterized in that: The preheating and humidifying chamber, the heating and humidifying chamber and the high-temperature cooking chamber are respectively provided with an air pressure control component, and the air pressure control component includes a pressure relief valve and a safety air valve.

9. The Liubao tea steaming device according to claim 1, characterized in that: A high-temperature mist mixer is arranged in the preheating humidification chamber and / or the heating humidification chamber and / or the high-temperature cooking chamber; the high-temperature mist mixer comprises a mixer body, a cavity is arranged in the mixer body, and an inner mesh layer and an outer mesh layer are arranged in the cavity; the inner mesh layer divides the cavity into an inner chamber; a mixing chamber is formed between the outer mesh layer and the inner mesh layer; an outer chamber is formed between the outer mesh layer and the outer shell of the mixer body; a plurality of air outlets are arranged on the outer shell of the mixer body; a heating pipe is arranged in the mixer body; a water mist delivery pipe is arranged in the inner chamber; a gas delivery pipe is arranged in the inner chamber and / or the outer chamber.

10. A method for steaming Liubao tea, characterized in that: Using a Liubao tea steaming device as described in any one of claims 1 to 9, the steps include: (1) sending the tea leaves to be steamed into the preheating and humidifying chamber to maintain the humidity above 80% and the temperature below 40° C.; (2) passing the tea leaves after step (1) into the heating and humidifying chamber and maintaining the temperature at 50-80° C.; (3) The tea leaves after step (2) are then introduced into the high-temperature cooking chamber and the temperature is maintained above 90° C.

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