Enshi Yuluo intelligent steam fixation machine and fixation method thereof

Abstract

The invention belongs to the technical field of tea processing, and particularly relates to an Enshi Yuluo intelligent steam fixation machine and a fixation method thereof. The enzyme deactivating machine comprises a feeding conveyor, an inclination angle adjustable vibration conveyor, a far infrared enzyme deactivating unit, a horizontal vibration conveying platform, a steam enzyme deactivating unit, a hot air enzyme deactivating unit, a stainless steel conveying vibration mesh belt platform, a roller enzyme deactivating unit and a controller, tea leaves are conveyed to a vibration conveyor with an adjustable inclination angle by a feeding conveyor, and sequentially pass through a horizontal vibration conveying platform, a stainless steel conveying vibration mesh belt platform, a hot air fixation unit and a roller fixation unit; in the conveying process of the tea leaves on the horizontal vibration conveying platform, the tea leaves are firstly subjected to far infrared fixation by the far infrared fixation unit and then subjected to steam fixation by the steam fixation unit. The device can realize far infrared-steam-hot air-roller combined fixation of tea leaves, effectively reduces the bitterness of the tea leaves, improves the aroma quality of the tea leaves, and can realize quantitative automatic processing.

Description

Technical Field

[0001] The invention belongs to the technical field of tea processing, and in particular relates to an Enshi Yulu intelligent steam tea-fixing machine and a tea-fixing method thereof. Background Art

[0002] Enshi Yulu tea is a kind of traditional Chinese steamed green tea. It looks like pine needles and has a green color. It has the distinctive characteristics of tea green, soup green, and leaf bottom green. The processing technology includes nine steps: spreading fresh leaves, killing green, fanning dry water vapor, frying the first hair fire, rolling, shoveling the second hair fire, shaping and polishing, roasting and aroma enhancement, and picking. Killing green is the key process in the formation and processing of the special flavor of green tea. The principle of killing green is to inactivate the endogenous enzymes in the tea leaves under high temperature by heating, promote the evaporation of leaf water and the loss of low-boiling-point grassy volatiles under continuous high temperature, and generate and accumulate new high-boiling-point volatile compounds. Steam killing green is a special process of Enshi Yulu processing. Through steam killing green, the tea leaves can be fully exposed to steam, the killing green is uniform, and the chlorophyll content in the tea leaves can be fully retained. However, the short steam killing time leads to insufficient conversion of the aroma substances of the tea leaves after steam killing green, and the bitter taste of the tea leaves cannot be reduced. In addition to steam killing, the mainstream methods of killing tea leaves include drum killing, hot air killing, and microwave killing. Drum killing can significantly help the conversion of tea aroma substances, but the working parameters of the killing drum are difficult to control. If the speed is too low, it is easy to make the tea leaves yellow, and if the temperature is too high, it is easy to burn the edges. Although hot air killing can maintain the aroma of tea leaves, the temperature of the tea leaves is quite different from that of the hot air, which can easily lead to rapid loss of moisture at the edge of the tea leaves, resulting in uneven killing and the problem of broken tea leaves in subsequent rolling. Microwave killing can keep the color of the tea leaves green, but the cost of microwave killing machines is relatively high, which is difficult for general companies to accept.

[0003] Steam killing is a necessary condition for the processing of Enshi Yu Lu tea. In view of the problems of steam killing in the current market, such as the strong smell of steam, strong bitter taste, etc., it is urgently necessary to develop an intelligent steam killing machine and a digital killing method for Enshi Yu Lu to solve the problem of Enshi Yu Lu's killing processing in my country, and at the same time improve the economic benefits of Enshi Yu Lu tea in my country. Summary of the invention

[0004] The purpose of the invention is to solve the shortcomings of the prior art and to provide an Enshi Yu Lu intelligent steam green fixing machine and a green fixing method thereof.

[0005] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions:

[0006] An Enshi Yu Lu intelligent tea-fixing machine comprises a feeding conveyor, an inclination-adjustable vibrating conveyor, a far-infrared tea-fixing unit, a horizontal vibrating conveying platform, a steam tea-fixing unit, a hot air tea-fixing unit, a stainless steel conveying vibrating mesh belt platform, a drum tea-fixing unit and a controller; the feeding conveyor is used to convey the tea leaves to the inclination-adjustable vibrating conveyor, the inclination-adjustable vibrating conveyor is used to convey the tea leaves to the horizontal vibrating conveying platform, the horizontal vibrating conveying platform is used to convey the tea leaves to the stainless steel conveying vibrating mesh belt platform, the stainless steel conveying vibrating mesh belt platform is used to convey the tea leaves to the hot air tea-fixing unit for tea-fixing, and is used to convey the tea leaves to the drum in the drum tea-fixing unit for drum tea-fixing; in the process of the tea leaves being conveyed on the horizontal vibrating conveying platform, the far-infrared tea-fixing unit is first used to perform far-infrared tea-fixing, and then the steam tea-fixing unit is used to perform steam tea-fixing.

[0007] The far-infrared fixing unit and the steam fixing unit are on the same top layer, and the far-infrared fixing unit is located on the left side of the steam fixing unit; the hot air fixing unit is on the second layer, located below the far-infrared fixing unit and the steam fixing unit, and the drum fixing unit is on the third layer, located below the hot air fixing unit.

[0008] Preferably, the feeding conveyor is located on the left side of the controller, and the outlet of the feeding conveyor is connected through an inclination-adjustable vibrating conveyor. The inclination-adjustable vibrating conveyor has a high feeding end and a low discharging end. The material is fed at the front end, and the conveyor is driven by a power device to reciprocate in the left and right directions, thereby driving the fresh tea leaves to be fed at a certain rate along the feeding direction, and discharging from the rear end to complete the continuous feeding of the fresh tea leaves; in addition, the inclination can be adjusted according to the different friction coefficients of different fresh tea leaves to ensure that the flow rate of tea leaves entering the withering unit is uniform; the feeding end of the inclination-adjustable vibrating conveyor is provided with a photoelectric switch. If the traditional direct feeding method is adopted, it is difficult to control the flow rate and a material leveling mechanism needs to be installed, while the inclination-adjustable vibrating conveyor makes the feeding more uniform and convenient.

[0009] Preferably, the inclination angle of the inclination-adjustable vibrating conveyor is 5°.

[0010] Preferably, the far-infrared tea-killing unit comprises a plate-shaped far-infrared radiator, which is installed above the horizontal vibration conveying platform. There is a gap between each plate-shaped far-infrared radiator, and pre-killing by far-infrared rays can preheat the tea leaves, which is conducive to steam killing, killing thoroughly and evenly, especially for fresh tea leaves with large buds and leaves, the steam killing effect is improved and the killing cost is reduced.

[0011] Preferably, if Figure 2As shown, the steam killing unit includes a steam boiler, a steam conduit I, a steam conduit II, an exhaust cover and a dehumidification fan. The steam killing unit has two exhaust covers and two dehumidification fans matched therewith. The exhaust cover is located above the horizontal vibration conveying platform, and the dehumidification fan is located above the exhaust cover. The steam boiler and the hot air furnace are located directly behind the machine body, and the steam boiler and the machine body are connected through steam pipe I and steam pipe II. 1mm small holes are evenly opened on the conveyor belt of the horizontal vibration conveying platform, and the fresh tea leaves are evenly spread on the horizontal vibration conveying platform, moving from the entrance on the left side of the horizontal vibration conveying platform to the outlet on the right side. The steam generated by the steam boiler passes through the steam conduit I and steam conduit II in turn and enters the bottom of the horizontal vibration conveying platform, then passes through the small holes to contact the tea leaves, penetrates the fresh tea leaves on the horizontal vibration conveying platform that have been far-infrared-killed, and completes the steam killing; while steam killing, the dehumidification fan on the exhaust cover is started to dehumidify the steam penetrating the tea leaves to prevent the tea leaves from turning yellow under the action of moisture and heat. The steam-killing time is short, which can quickly inhibit the activity of enzymes and reduce the destruction of chlorophyll, so that the finished tea has a vivid green color, and the soup color and the bottom of the leaves are green and moist. More preferably, the conveyor belt is a mesh belt.

[0012] Preferably, the hot air fixing unit comprises a hot air furnace, an air inlet, a hot air duct, a smoke exhaust fan, a hot air blower, and a hot air blower air delivery duct. The air outlet of the air inlet is connected to the air inlet of the hot air furnace, the air outlet of the hot air furnace is connected to the body through the hot air duct, and the side wall of the hot air duct is connected to the smoke exhaust fan. The hot air duct is located below the stainless steel conveying vibration mesh belt platform, the hot air blower is installed on the left side of the far-infrared fixing unit and above the controller, the hot air blower air delivery duct is located above the stainless steel conveying vibration mesh belt platform, the air inlet of the hot air blower air delivery duct is connected to the hot air blower, and the air outlet is located above the entrance of the stainless steel conveying vibration mesh belt platform. After steam sterilization, the tea leaves fall from the exit of the horizontal vibrating conveyor platform onto the stainless steel conveyor vibrating mesh belt platform. The tea leaves are spread on the stainless steel conveyor vibrating mesh belt platform and move along the stainless steel conveyor vibrating mesh belt from the right entrance to the left exit. The hot air generated by the hot air furnace is sent in from the bottom of the stainless steel conveyor vibrating mesh belt platform through the hot air duct, penetrates the tea leaves on the stainless steel conveyor vibrating mesh belt platform, and sterilizes the lower part of the tea leaves with hot air; at the same time, the hot air generated by the hot air blower is sent in from the top of the stainless steel conveyor vibrating mesh belt platform through the hot air blower air duct, contacts the tea leaves, and sterilizes the upper part of the tea leaves with hot air. The hot air sterilization process heats up rapidly, and the sterilized leaves are emerald green.

[0013] Preferably, if Figure 3-4 As shown, the drum killing tea unit includes a motor, a first-level small pulley, a first-level large pulley, a second-level small sprocket, a second-level large sprocket, a tugwheel, a belt, a chain, a drum, a guide vane, a support wheel, a tea outlet, a drum killing tea unit transmission mechanism handle, a transmission shaft, a transmission shaft mounting bearing I, a transmission shaft mounting bearing II, an annular heating tube, and a vibrating feed port.

[0014] The transmission mechanism of the drum green-fixing unit includes a motor, a primary small pulley, a primary large pulley, a secondary small sprocket, a secondary large sprocket, a tug I, a tug II, a belt, and a chain. The manual transmission mechanism of the drum green-fixing unit includes a handle of the drum green-fixing unit transmission mechanism, a connecting shaft, and a bearing. The bearing, the handle of the drum green-fixing unit transmission mechanism, the primary large pulley, and the secondary small sprocket are coaxial. Four guide vanes are installed inside the drum. The motor in the drum green-fixing unit outputs power to the primary small pulley, and the primary small pulley transmits power to the primary large pulley through the belt, thereby completing the primary deceleration. The primary large pulley is coaxial with the secondary small sprocket, and the primary large pulley drives the secondary small sprocket to move. The secondary small sprocket transmits power to the secondary large sprocket through the chain, thereby completing the secondary deceleration; the secondary large sprocket is symmetrically arranged on both sides of the drum. The two secondary large sprockets are coaxial with tug I and tug II respectively, and transmit power to tug I and tug II. Tug I and tug II rotate, thereby driving the drum to rotate. After hot air sterilization, the tea leaves fall into the vibrating feed port from the left exit of the stainless steel conveying vibration mesh belt platform. Through the vibrating feed port, the tea leaves are evenly and evenly flowed into the drum for roller sterilization. As the drum rotates, the tea leaves come into contact with the drum wall, and then flip forward under the action of the guide vane plate, and fall from the discharge port of the roller sterilization unit to complete the roller sterilization. Four weight sensors are installed under the drum to receive the quality signal of the tea leaves in the drum, thereby controlling the feeding speed of the vibrating feed port, ensuring that the weight of the tea leaves inside the drum is stable within the optimal range, and improving the roller sterilization effect. The Enshi Yu Lu tea produced after the roller sterilization has a high aroma and mellow taste, which can effectively remove the grass smell, reduce the bitterness, and improve the freshness.

[0015] Preferably, the electric motor is a variable frequency motor.

[0016] Preferably, a plurality of annular heating tubes are evenly arranged on the outer wall of the drum. The annular heating tubes are annular electric heating tubes and are spaced 30-40 cm apart from each other. A temperature and humidity sensor is installed inside the drum at a distance of 1-2 cm from the inner wall of the drum and is connected to a controller to automatically control the temperature of the drum fixing unit. The middle insulation layer is filled with aluminum silicate fiber and is located between the annular heating tube and the outer wall of the drum.

[0017] A method for fixing green tea based on the aforementioned Enshi Yu Lu self-energy fixing machine, comprising feeding, far-infrared fixing, steam fixing, hot air fixing, drum fixing and the like, specifically comprising the following steps:

[0018] Step A, turn on the controller switch, set the temperatures of the far-infrared fixing unit, the steam fixing unit, the hot air fixing unit, and the drum fixing unit to 400°C, 500°C, 100°C, and 200°C respectively, and adjust the inclination of the adjustable-angle vibration conveyor to 5°; then turn on the far-infrared temperature control switch, the steam temperature control switch, the hot air temperature control switch, and the drum temperature control switch, collect the real-time temperature through the temperature sensor and compare it with the set temperature, and when the real-time temperature reaches the set temperature, the feeding conveyor starts feeding;

[0019] Step B, putting the one-bud two-leaf tea leaves of No. 10 Hubei Tea selected as raw materials into the feeding conveyor to start feeding, the controller controls the feeding conveyor to feed, the tea leaves fall into the inclination-adjustable vibrating conveyor, and then enter the horizontal vibrating conveying platform and enter the far-infrared fixing unit for far-infrared fixing; when the infrared light-emitting tube of the photoelectric switch arranged at the feeding end of the inclination-adjustable vibrating conveyor is blocked by the tea leaves, the controller receives a signal that there are tea leaves on the inclination-adjustable vibrating conveyor, and at this time the controller controls the inclination-adjustable vibrating conveyor to vibrate;

[0020] Step C, the tea leaves on the inclination-adjustable vibrating conveyor begin to enter the horizontal vibrating conveying platform. When the infrared light-emitting tube of the photoelectric switch arranged at the feeding end of the horizontal vibrating conveying platform is blocked by the tea leaves, the controller receives a signal that there are tea leaves on the horizontal vibrating conveying platform. At this time, the controller controls the horizontal vibrating conveying platform to vibrate, so that the tea leaves are evenly dispersed, and then the tea leaves are conveyed into the far-infrared fixing unit for pre-fixing, and the pre-fixing time is about 5-10s; the temperature in the far-infrared fixing unit is controlled to reach 400-450°C, and the far-infrared pre-fixing is started. At the same time, the steam boiler in the steam fixing unit is controlled to start conveying steam, and the dehumidifying fan is controlled to start;

[0021] Step D, when the tea leaves that have completed far-infrared fixing enter the steam fixing unit, the turned-on steam boiler conveys steam through the pipeline to fill the steam fixing unit, and at the same time, the dehumidifying fan on the exhaust cover is turned on to dehumidify, and steam fixing begins. The process conditions of steam fixing are: steam temperature 500°C, steam pressure 0.4 MPa, steam conduit opening interval between 1 / 2-1, and fixing time 25-30s;

[0022] After the steam killing is completed, the tea leaves enter the stainless steel conveyor vibration mesh belt platform of the lower hot air killing unit. When the infrared light-emitting tube of the photoelectric switch set at the feeding end of the stainless steel conveyor vibration mesh belt platform is blocked by the tea leaves, the controller receives a signal that there are tea leaves on the stainless steel conveyor vibration mesh belt platform. At this time, the controller controls the stainless steel conveyor vibration mesh belt platform to start running, and at the same time starts the hot air conveying pipeline and hot air blower, hot air furnace and hot air pipeline, respectively, to kill the tea leaves with hot air from the upper and lower parts, and the hot air fills the hot air killing unit. The hot air dehydration temperature is controlled at 100°C and the time is 10-15s.

[0023] Step E, after the hot air killing is completed, the tea leaves enter the vibrating feed port of the drum killing unit on the third layer from the stainless steel conveying vibration mesh belt platform. When the infrared light-emitting tube of the photoelectric switch set at the feeding end of the vibrating feed port is blocked by the tea leaves, the controller receives a signal that there are tea leaves on the vibrating feed port. At this time, the controller controls the vibration of the vibrating feed port and starts the drum to start running; at this time, the tea leaves that have been killed by hot air fall into the drum from the discharge end of the vibrating feed port for drum killing. The speed of the drum is set to 30r / min. The weight sensor installed under the drum by the drum bracket determines the degree of water loss of the tea leaves in the drum. If the killing is excessive, the drum speed or the feeding amount of the vibrating feed port is increased. If the killing is insufficient, the drum speed or the feeding amount of the vibrating feed port is reduced until the weight of the tea leaves in the drum is maintained at the weight required for the best killing. The process conditions of drum killing are: drum temperature 200℃, time about 1.5-2min, and tea moisture content 55-58%.

[0024] The temperature collected by the temperature sensor is compared with the set temperature. The moisture content rapid detection sensor set at the drum outlet collects moisture content data and compares it with the set moisture content. The temperature change error and error change rate, moisture content change error and moisture content error change rate in the withering process are input into the controller, and the fuzzy control algorithm is used to achieve adaptive adjustment of process parameters such as temperature and leaf amount in the withering process.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] In the present invention, the temperature controller is turned on normally, and the far infrared temperature, steam temperature, hot air temperature and drum temperature of the box are set. The tea leaves are transported to the interior of the tea-fixing machine box by the tea elevator, and the far infrared tea leaves of the first layer are firstly fixed by the far infrared, and the tea leaves after the far infrared fixing enter the rear section of the first layer for steam fixing, and the tea leaves after the steam fixing fall into the vibration platform of the second layer for hot air fixing, and the tea leaves after the hot air fixing are sent to the third layer for drum fixing.

[0027] In summary, the present invention combines tea with far infrared-steam-hot air-drum multi-mode tea withering, wherein the far infrared pre-killing is beneficial to steam killing and killing (especially for raw materials with enlarged buds and leaves) by preheating the tea leaves, and improves the steam killing effect by more than 15%; the drum supplementary killing is beneficial to removing the grass smell, effectively improving the tea withering quality, so that the aroma substances in the tea can be effectively transformed while retaining the three green qualities of the tea, and can effectively reduce the bitterness by more than 80%, and increase the freshness by more than 60%, thereby improving the quality of Enshi Yu Lu tea withering, so that the processed tea has the characteristics of high quality, high standards, low cost, etc., which is of great significance to the development of Enshi Yu Lu tea. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 It is a structural front view of the present invention;

[0030] Figure 2 It is a top view of the structure of the present invention;

[0031] Figure 3 It is a structural schematic diagram of the drum fixing machine of the present invention;

[0032] Figure 4 It is a schematic diagram of the transmission structure of the drum fixing machine of the present invention;

[0033] Figure 5 is a schematic diagram of a controller of the present invention;

[0034] Among them: feeding conveyor 1, inclination adjustable vibrating conveyor 2, hot air blower 3, horizontal vibrating conveying platform 4, plate-shaped far-infrared radiator 5, observation door 6, exhaust cover 7, vibration motor 8, hot air blower air duct 9, stainless steel conveying vibration mesh belt platform 10, hot air blower air duct outlet 11, drum killing unit discharge port 12, drum 13, drum killing unit transmission mechanism handle 14, controller 15, operation panel 15-1, hot air temperature display 15-2, drum temperature display 15-3, normal switch 15-4, emergency switch 15-5, drum temperature knob 15-6, drum temperature control switch 15-7, hot air temperature knob 15-8, hot air temperature control switch 15-9, steam temperature control switch 15-10 , far-infrared temperature control switch 15-11, far-infrared temperature knob 15-12, steam temperature knob 15-13, far-infrared temperature display 15-14, steam temperature display 15-15, steam boiler 16, steam duct I 17, hot air furnace 18, air inlet fan 19, hot air duct 20, smoke exhaust fan 21, steam duct II 22, dehumidifying fan 23, annular heating pipe 24, vibration feed port 25, secondary large sprocket 26, chain 27, primary large pulley 28, motor 29, belt 30, tugboat I 31, guide vane 32, transmission shaft 33, secondary small sprocket 34, primary small pulley 35, transmission shaft mounting bearing I 36, transmission shaft mounting bearing II 37, tugboat II 38, weight sensor 39, drum bracket 40. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] Example 1

[0037] like Figure 1 As shown, an Enshi Yu Lu intelligent tea-fixing machine includes a feeding conveyor 1, an inclination-adjustable vibrating conveyor 2, a far-infrared tea-fixing unit, a horizontal vibrating conveying platform 4, a steam tea-fixing unit, a hot air tea-fixing unit, a stainless steel conveying vibrating mesh belt platform 10, a drum tea-fixing unit and a controller 15; the feeding conveyor 1 is used to convey the tea leaves to the inclination-adjustable vibrating conveyor 2, the inclination-adjustable vibrating conveyor 2 is used to convey the tea leaves to the horizontal vibrating conveying platform 4, the horizontal vibrating conveying platform 4 is used to convey the tea leaves to the stainless steel conveying vibrating mesh belt platform 10, the stainless steel conveying vibrating mesh belt platform 10 is used to convey the tea leaves to the hot air tea-fixing unit for fixing, and to convey the tea leaves to the drum in the drum tea-fixing unit for drum fixing; in the process of being conveyed on the horizontal vibrating conveying platform 4, the tea leaves are firstly far-infrared-fixed by the far-infrared tea-fixing unit, and then steam-fixed by the steam tea-fixing unit.

[0038] The feeding conveyor 1 is located on the left side of the controller 15, and the outlet of the feeding conveyor 1 is connected through an inclination-adjustable vibrating conveyor 2. The inclination-adjustable vibrating conveyor 2 has a high feeding end and a low discharging end. The material is fed at the front end, and the conveyor is driven by a power device to reciprocate in the left and right directions, thereby driving the fresh tea leaves to be fed at a certain rate along the feeding direction, and discharging from the rear end to complete the continuous feeding of the fresh tea leaves; in addition, the inclination can be adjusted according to the different friction coefficients of different fresh tea leaves to ensure that the flow rate of tea leaves entering the withering unit is uniform; the feeding end of the inclination-adjustable vibrating conveyor 2 is provided with a photoelectric switch. If the traditional direct feeding method is adopted, it is not easy to control the flow rate and a material leveling mechanism needs to be installed, while the inclination-adjustable vibrating conveyor 2 makes the feeding more uniform and convenient.

[0039] The inclination angle of the inclination-adjustable vibrating conveyor 2 is 5°.

[0040] The far-infrared fixing unit and the steam fixing unit are on the same top layer, and the far-infrared fixing unit is located on the left side of the steam fixing unit; the hot air fixing unit is on the second layer, located below the far-infrared fixing unit and the steam fixing unit, and the drum fixing unit is on the third layer, located below the hot air fixing unit.

[0041] The far-infrared tea-killing unit comprises a plate-shaped far-infrared radiator 5, which is installed above the horizontal vibration conveying platform 4. There is a gap between each plate-shaped far-infrared radiator 5, and the pre-killing by far-infrared rays can preheat the tea leaves, which is conducive to steam killing, killing through and killing evenly, especially for fresh tea leaves with large buds and leaves, the steam killing effect is improved and the killing cost is reduced.

[0042] like Figure 2As shown, the steam killing unit includes a steam boiler 16, a steam conduit I 17, a steam conduit II 22, an exhaust cover 7 and a dehumidifying fan 23. The steam killing unit has two exhaust covers 7 and two dehumidifying fans 23 matched therewith, the exhaust covers 7 are located above the horizontal vibration conveying platform 4, and the dehumidifying fan 23 is located above the exhaust covers 7. The steam boiler 16 and the hot air furnace 18 are located directly behind the machine body, and the steam boiler 16 is connected to the machine body through the steam pipe I 17 and the steam pipe II 22. The conveyor belt of the horizontal vibrating conveying platform 4 is evenly provided with 1mm small holes, and the fresh tea leaves are evenly spread on the horizontal vibrating conveying platform 4, and move from the entrance on the left side of the horizontal vibrating conveying platform 4 to the exit on the right side. The steam generated by the steam boiler 16 passes through the steam conduit I 17 and the steam conduit II 22 in turn and enters the bottom of the horizontal vibrating conveying platform 4, and then passes through the small holes to contact the tea leaves, penetrate the fresh tea leaves on the horizontal vibrating conveying platform 4 that have been far-infrared-fixed, and complete the steam-fixing; while the steam-fixing is being started, the dehumidifying fan 23 on the exhaust cover 7 is started to dehumidify the steam that penetrates the tea leaves, so as to prevent the tea leaves from turning yellow under the action of moisture and heat. The steam-fixing time is short, which can quickly inhibit the activity of enzymes, reduce the destruction of chlorophyll, and make the finished tea fresh green, and the soup color and leaf bottom green.

[0043] The hot air fixing unit includes a hot air furnace 18, an air inlet fan 19, a hot air duct 20, a smoke eliminator 21, a hot air fan 3, and a hot air fan air delivery duct 9. The air outlet of the air inlet fan 19 is connected to the air inlet of the hot air furnace 18. The air outlet of the hot air furnace 18 is connected to the body through the hot air duct 20. The side wall of the hot air duct 20 is connected to the smoke eliminator 21. The hot air duct 20 is located below the stainless steel conveying vibration mesh belt platform 10. The hot air fan 3 is installed on the left side of the far-infrared fixing unit and above the controller 15. The hot air fan air delivery duct 9 is located above the stainless steel conveying vibration mesh belt platform 10. The air inlet of the hot air fan air delivery duct 9 is connected to the hot air fan 3, and the air outlet is located above the entrance of the stainless steel conveying vibration mesh belt platform 10. The tea leaves after steam sterilization fall from the exit of the horizontal vibrating conveying platform 4 onto the stainless steel conveying vibrating mesh belt platform 10. The tea leaves are spread on the stainless steel conveying vibrating mesh belt platform 10 and move along the stainless steel conveying vibrating mesh belt from the right entrance to the left exit. The hot air generated by the hot air furnace 18 is sent in from the bottom of the stainless steel conveying vibrating mesh belt platform 10 through the hot air duct 20, penetrates the tea leaves on the stainless steel conveying vibrating mesh belt platform 10, and sterilizes the lower part of the tea leaves with hot air; at the same time, the hot air generated by the hot air blower 3 is sent in from the top of the stainless steel conveying vibrating mesh belt platform 10 through the hot air blower air duct 9, contacts the tea leaves, and sterilizes the upper part of the tea leaves with hot air. The hot air sterilization process heats up rapidly, and the sterilized leaves are emerald green.

[0044] like Figure 3-4As shown, the drum killing tea unit includes a motor 29, a first-level small pulley 35, a first-level large pulley 28, a second-level small sprocket 34, a second-level large sprocket 26, a tugwheel, a belt 30, a chain 27, a drum 13, a guide vane 32, a support wheel, a tea outlet, a drum killing tea unit transmission mechanism handle 14, a transmission shaft 33, a transmission shaft mounting bearing Ⅰ36, a transmission shaft mounting bearing Ⅱ37, an annular heating tube 24, and a vibrating feed port 25.

[0045] The transmission mechanism of the drum killing unit includes a motor 29, a primary small pulley 35, a primary large pulley 28, a secondary small sprocket 34, a secondary large sprocket 26, a tug I 31, a tug II 38, a belt 30, and a chain 27. The manual transmission mechanism of the drum killing unit includes a drum killing unit transmission mechanism handle 14, a connecting shaft, and a bearing. The bearing, the drum killing unit transmission mechanism handle 14, the primary large pulley 28, and the secondary small sprocket 34 are coaxial. Four guide vanes are installed inside the drum 13. The motor 29 in the drum killing unit outputs power to the primary small pulley 35, and the primary small pulley 35 transmits power to the primary large pulley 28 through a belt, thereby completing a primary deceleration. The primary large pulley 28 is coaxial with the secondary small sprocket 34, and the primary large pulley 28 drives the secondary small sprocket 34 to move. The secondary small sprocket 34 transmits power to the secondary large sprocket 26 through the chain 27, thereby completing a secondary deceleration; the secondary large sprocket 26 is symmetrically arranged on both sides of the drum. The two secondary large sprockets 26 are coaxial with tugboat Ⅰ31 and tugboat Ⅱ38 respectively, and transmit power to tugboat Ⅰ31 and tugboat Ⅱ38. Tugboat Ⅰ31 and tugboat Ⅱ38 rotate, thereby driving the drum 13 to rotate. The tea leaves after hot air sterilization fall into the vibrating feed port 25 from the left exit of the stainless steel conveying vibration mesh belt platform 10, and the tea leaves are uniformly and evenly flowed into the drum 13 through the vibrating feed port 25 for drum sterilization. The tea leaves contact the drum wall as the drum rotates, and then flip forward under the action of the guide vane plate, and fall from the discharge port 12 of the drum sterilization unit to complete the drum sterilization. Four weight sensors 39 are installed under the drum 13 to receive the quality signal of the tea leaves in the drum to control the feeding speed of the vibrating feed port 25, ensure that the weight of the tea leaves inside the drum is stable within the optimal range, and improve the drum sterilization effect. The Enshi Yulu tea made after drum sterilization has a high fragrance and mellow taste, can effectively remove the grass smell, reduce the bitterness, and improve the freshness.

[0046] The electric motor 29 is a variable frequency motor.

[0047] In this embodiment, a plurality of annular heating tubes 24 are evenly arranged on the outer wall of the drum 13. The annular heating tubes 24 are annular electric heating tubes and are spaced 30-40 cm apart from each other. A temperature and humidity sensor is installed in the drum at a distance of 1.5 cm from the inner wall of the drum and is connected to a controller to automatically control the temperature of the drum fixing unit. The middle insulation layer is filled with aluminum silicate fiber and is located between the annular heating tube and the outer wall of the drum.

[0048] Example 2

[0049] A method for fixing green tea using the Enshi Yu Lu self-energizing fixing machine based on Example 1, comprising feeding, far-infrared fixing, steam fixing, hot air fixing, drum fixing and the like, specifically comprising the following steps:

[0050] Step A, turn on the controller 15 switch, set the temperatures of the far-infrared fixing unit, the steam fixing unit, the hot air fixing unit, and the drum fixing unit to 400°C, 500°C, 100°C, and 200°C, respectively, and adjust the inclination of the adjustable-angle vibrating conveyor 2 to 5°; then turn on the far-infrared temperature control switch 15-11, the steam temperature control switch 15-10, the hot air temperature control switch 15-9, and the drum temperature control switch 15-7, collect the real-time temperature through the temperature sensor and compare it with the set temperature, and when the real-time temperature reaches the set temperature, the feeding conveyor starts feeding;

[0051] Step B, putting the one-bud two-leaf tea leaves of No. 10 Hubei Tea selected as raw materials into the feeding conveyor 1 to start feeding, the controller 15 controls the feeding conveyor to feed, the tea leaves fall into the inclination-adjustable vibrating conveyor 2, and then enter the horizontal vibrating conveying platform 4 to enter the far-infrared fixing unit for far-infrared fixing; when the infrared light-emitting tube of the photoelectric switch set at the feeding end of the inclination-adjustable vibrating conveyor 2 is blocked by the tea leaves, the controller 15 receives a signal that there are tea leaves on the inclination-adjustable vibrating conveyor, and at this time the controller 15 controls the inclination-adjustable vibrating conveyor 2 to vibrate;

[0052] Step C, the tea leaves on the inclination-adjustable vibrating conveyor 2 begin to enter the horizontal vibrating conveying platform 4. When the infrared light-emitting tube of the photoelectric switch provided at the feeding end of the horizontal vibrating conveying platform is blocked by the tea leaves, the controller 15 receives a signal that there are tea leaves on the horizontal vibrating conveying platform 4. At this time, the controller 15 controls the horizontal vibrating conveying platform 4 to vibrate, so that the tea leaves are evenly dispersed, and then the tea leaves are conveyed into the far-infrared fixing unit for pre-fixing, and the pre-fixing time is about 5 seconds; the temperature in the far-infrared fixing unit is controlled to reach 400° C., and the far-infrared pre-fixing is started. At the same time, the steam boiler 16 in the steam fixing unit is controlled to start conveying steam, and the dehumidifying fan 23 is controlled to start;

[0053] Step D, when the tea leaves that have completed far-infrared fixing enter the steam fixing unit, the turned-on steam boiler 16 delivers steam through the pipeline to fill the steam fixing unit, and at the same time, the dehumidifying fan 23 on the exhaust cover 7 is turned on to dehumidify, and steam fixing begins. The process conditions of steam fixing are: steam temperature 500°C, steam pressure 0.4 MPa, steam conduit opening interval between 1 / 2-1, and fixing time 25-30s;

[0054] After the steam killing is completed, the tea leaves enter the stainless steel conveyor vibration mesh belt platform 10 of the lower hot air killing unit. When the infrared light-emitting tube of the photoelectric switch set at the feeding end of the stainless steel conveyor vibration mesh belt platform 10 is blocked by the tea leaves, the controller 15 receives a signal that there are tea leaves on the stainless steel conveyor vibration mesh belt platform 10. At this time, the controller 15 controls the stainless steel conveyor vibration mesh belt platform 10 to start running, and at the same time starts the hot air conveying pipeline 9 and the hot air blower 3, the hot air furnace 18 and the hot air pipeline 20, respectively, to kill the tea leaves with hot air from the upper and lower parts, and the hot air fills the hot air killing unit. The hot air dehydration temperature is controlled to be 100°C and the time is 10-15s.

[0055] Step E, after the hot air killing is completed, the tea leaves enter the vibrating feed port 25 of the drum killing unit on the third layer from the stainless steel conveying vibration mesh belt platform 10. When the infrared light-emitting tube of the photoelectric switch arranged at the feeding end of the vibrating feed port 25 is blocked by the tea leaves, the controller 15 receives a signal that there are tea leaves on the vibrating feed port 25. At this time, the controller 15 controls the vibration of the vibrating feed port 25 and starts the drum 13 to start running. At this time, the tea leaves that have been killed by hot air fall into the drum 13 from the discharge end of the vibrating feed port 25 for drum killing. The rotation speed of the drum 13 is set to 30r / min. The weight sensor 39 installed under the drum 13 by the drum bracket 40 determines the degree of water loss of the tea leaves in the drum. If the tea leaves are over-killed, the rotation speed of the drum 13 or the feeding amount of the vibrating feed port 25 is increased. If the tea leaves are under-killed, the rotation speed of the drum 13 or the feeding amount of the vibrating feed port 25 is reduced until the weight of the tea leaves in the drum is maintained at the weight required for optimal killing. The process conditions of drum killing are: drum temperature 200℃, time about 1.5-2min, tea moisture content 55-58%.

[0056] The temperature collected by the temperature sensor is compared with the set temperature, and the moisture content data collected by the moisture content rapid detection sensor arranged at the outlet of the drum 13 is compared with the set moisture content. By inputting four factors, namely, the temperature change error and error change rate, moisture content change error and moisture content error change rate during the withering process into the controller, the fuzzy control algorithm is used to realize the adaptive adjustment of process parameters such as the temperature and leaf amount of the withering process.

[0057] Comparative Example 1: The one bud and two leaves raw material of E-tea No. 10 was also used as the test object. The steam withering machine (6CZQRC-300, Sichuan Dengyao Machinery Equipment Co., Ltd.) which is widely used in production in Hubei Province was adopted. The steam withering process parameters were set as follows: withering temperature 520°C, steam pressure 0.4mpa, steam volume 1 / 4, hot air dehydration temperature 130°C for the first layer, 170°C for the second layer, rotation speed 32Hz for the first layer, 34Hz for the second layer, and 36Hz for the third layer.

[0058] Comparative Example 2: The raw material of Hubei Tea No. 10 with one bud and two leaves was also used as the test object, and the drum fixing machine (Hubei Yefeng Machinery Co., Ltd. 6SCT-100) which is currently widely used in production in Hubei Province was used, with a fixing temperature of 280°C and a fixing time of 2min10s;

[0059] Comparative Example 3: The raw material of one bud and two leaves of Echa No. 10 was also used as the test object, and the hot air fixing machine (6CST-100FA of Hubei Shangyang Technology Development Co., Ltd.) which is widely used in production in Hubei Province was used, with a fixing temperature of 280°C and a fixing time of 30s;

[0060] In comparative examples 1-3, the leaves were all withered to a moisture content of 54-58%, and the subsequent process flow of the withered leaves was cooling and moisture regaining - rolling and twisting - straightening - fine rolling - rough firing - cooling and moisture regaining - full firing.

[0061] The sensory evaluation results of the finished tea obtained by different fixing methods are shown in Table 1. The results show that because the fixing method of the present invention is more scientific and accurate in designing and regulating the fixing process and parameter details of Enshi Yu Lu tea leaves, and integrates the advantages of multiple fixing methods, under the same subsequent process conditions, the sensory scores of the finished tea samples are significantly higher than those of the traditional single steam fixing, single hot air fixing, and single drum fixing.

[0062] Table 1 Sensory evaluation results of tea samples with different killing methods

[0063]

[0064] The sensory evaluation scoring criteria are: appearance × 10% + color × 15% + soup color × 10% + aroma × 30% + taste × 25% + leaf bottom × 10%.

[0065] In summary, the present invention combines the tea with far infrared-steam-hot air-drum multi-mode tea, wherein the far infrared pre-tearing is beneficial to steam tea killing and killing (especially for raw materials with large buds and leaves) by preheating the tea, and improves the steam tea killing effect by more than 15%; the drum supplementary tea killing is beneficial to remove the grass smell, effectively improve the tea withered quality, and make the aroma substances in the tea be effectively transformed while retaining the three green qualities of the tea, and can effectively reduce the bitterness by more than 80%, and improve the freshness by more than 60%. Compared with simple steam tea killing, the equipment of the present invention can significantly improve the quality of Enshi Yulu tea with high aroma and fresh taste, so that the processed tea has the characteristics of high quality, high standard and low cost, which is of great significance to the development of Enshi Yulu tea.

[0066] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An Enshi Yulu intelligent green fixing machine, comprising a feeding conveyor, an inclination-adjustable vibrating conveyor, a far-infrared green fixing unit, a horizontal vibrating conveying platform, a steam green fixing unit, a hot air green fixing unit, a stainless steel conveying vibrating mesh belt platform, a drum green fixing unit and a controller; characterized in that: The feeding conveyor is used to convey the tea leaves to the inclination-adjustable vibrating conveyor, the inclination-adjustable vibrating conveyor is used to convey the tea leaves to the horizontal vibrating conveying platform, the horizontal vibrating conveying platform is used to convey the tea leaves to the stainless steel conveying vibrating mesh belt platform, the stainless steel conveying vibrating mesh belt platform is used to convey the tea leaves to the hot air fixing unit for fixing, and to convey the tea leaves to the drum in the drum fixing unit for drum fixing; during the process of the tea leaves being conveyed on the horizontal vibrating conveying platform, the tea leaves are firstly fixed by the far-infrared fixing unit, and then by the steam fixing unit for steam fixing; The far-infrared fixing unit and the steam fixing unit are on the same top layer, and the far-infrared fixing unit is located on the left side of the steam fixing unit; the hot air fixing unit is on the second layer, located below the far-infrared fixing unit and the steam fixing unit, and the drum fixing unit is on the third layer, located below the hot air fixing unit.

2. The Enshi Yu Lu intelligent fixing machine according to claim 1, characterized in that: The feeding conveyor is located on the left side of the controller, and the outlet of the feeding conveyor is connected through an inclination-adjustable vibrating conveyor; the feeding end of the vibrating conveyor with adjustable inclination is high and the discharging end is low, the material is fed at the front end, and the conveyor is driven by a power device to reciprocate in the left and right directions, thereby driving the fresh tea leaves to be fed at a certain rate along the feeding direction, and discharging from the rear end to complete the continuous feeding of the fresh tea leaves; a photoelectric switch is provided at the feeding end of the vibrating conveyor with adjustable inclination.

3. The Enshi Yu Lu intelligent fixing machine according to claim 1, characterized in that: The inclination angle of the adjustable inclination vibrating conveyor is 5°.

4. The Enshi Yu Lu intelligent fixing machine according to claim 1, characterized in that: The far-infrared tea-killing unit comprises a plate-shaped far-infrared radiator, which is installed above a horizontal vibration conveying platform; gaps are left between each plate-shaped far-infrared radiator, and pre-killing of tea leaves by far-infrared rays can be performed to heat the tea leaves.

5. The Enshi Yu Lu intelligent fixing machine according to claim 1, characterized in that: The steam killing unit comprises a steam boiler, a steam duct I, a steam duct II, an exhaust cover and a dehumidification fan; the steam killing unit has two exhaust covers and two matching dehumidification fans, the exhaust cover is located above the horizontal vibrating conveying platform, and the dehumidification fan is located above the exhaust cover; the steam boiler and the hot air furnace are located directly behind the machine body, and the steam boiler and the machine body are connected through steam pipe I and steam pipe II; 1mm small holes are evenly arranged on the conveyor belt of the horizontal vibrating conveying platform, and the fresh tea leaves are evenly spread on the horizontal vibrating conveying platform, moving from the entrance on the left side of the horizontal vibrating conveying platform to the outlet on the right side, and the steam generated by the steam boiler passes through the steam duct I and the steam duct II in turn and then enters the bottom of the horizontal vibrating conveying platform, and then passes through the small holes to contact the tea leaves, and penetrates the fresh tea leaves on the horizontal vibrating conveying platform that have been far-infrared killed.

6. The Enshi Yu Lu intelligent fixing machine according to claim 1, characterized in that: The hot air fixing unit includes a hot air furnace, an air inlet fan, a hot air duct, a smoke exhaust fan, a hot air fan, and a hot air fan air supply duct. The air outlet of the air inlet fan is connected to the air inlet of the hot air furnace, and the air outlet of the hot air furnace is connected to the body through a hot air duct. The side wall of the hot air duct is connected to the smoke exhaust fan; the hot air duct is located below the stainless steel conveying vibration mesh belt platform, the hot air fan is installed on the left side of the far-infrared fixing unit and above the controller, the hot air fan air supply duct is located above the stainless steel conveying vibration mesh belt platform, the air inlet of the hot air fan air supply duct is connected to the hot air fan, and the air outlet is located on the stainless steel conveying vibration mesh belt Above the platform entrance; the tea leaves after steam sterilization fall from the exit of the horizontal vibrating conveying platform onto the stainless steel conveying vibrating mesh belt platform, the tea leaves are spread on the stainless steel conveying vibrating mesh belt platform and move along with the stainless steel conveying vibrating mesh belt from the right entrance to the left exit, the hot air generated by the hot air furnace is sent in from the bottom of the stainless steel conveying vibrating mesh belt platform through the hot air duct, penetrates the tea leaves on the stainless steel conveying vibrating mesh belt platform, and sterilizes the lower part of the tea leaves with hot air; at the same time, the hot air generated by the hot air blower is sent in from the top of the stainless steel conveying vibrating mesh belt platform through the hot air blower air supply duct, contacts with the tea leaves, and sterilizes the upper part of the tea leaves with hot air.

7. The intelligent fixing machine for Enshi Yulu tea according to claim 1, characterized in that: The drum fixing unit includes a motor, a primary small pulley, a primary large pulley, a secondary small sprocket, a secondary large sprocket, a tug, a belt, a chain, a drum, a guide vane, a support wheel, a tea outlet, a handle of the drum fixing unit transmission mechanism, a transmission shaft, a transmission shaft mounting bearing I, a transmission shaft mounting bearing II, an annular heating tube, and a vibration feed port; The transmission mechanism of the drum killing green unit includes an electric motor, a primary small pulley, a primary large pulley, a secondary small sprocket, a secondary large sprocket, tugwheel I, tugwheel II, a belt, and a chain; the manual transmission mechanism of the drum killing green unit includes a handle of the drum killing green unit transmission mechanism, a connecting shaft, and a bearing; the bearing, the handle of the drum killing green unit transmission mechanism, the primary large pulley, and the secondary small sprocket are coaxial; four guide vanes are installed inside the drum; the electric motor in the drum killing green unit outputs power to the primary small pulley, and the primary small pulley transmits power to the primary large pulley through the belt, thereby completing a primary deceleration; the primary large pulley is coaxial with the secondary small sprocket, the primary large pulley drives the secondary small sprocket to move, and the secondary small sprocket transmits power to the secondary through the chain The second large sprocket is symmetrically arranged on both sides of the drum, and the two second large sprockets are coaxial with tug I and tug II respectively, transmitting power to tug I and tug II, and tug I and tug II rotate, thereby driving the drum to rotate; the tea leaves after hot air sterilization fall into the vibrating feed port from the left outlet of the stainless steel conveying vibration mesh belt platform, and the tea leaves are uniformly fed into the drum through the vibrating feed port for drum sterilization. The tea leaves contact the drum wall as the drum rotates, and then flip forward under the action of the guide vane plate, and fall from the discharge port of the drum sterilization unit to complete the drum sterilization; 4 weight sensors are installed under the drum to receive the tea quality signal in the drum to control the feeding speed of the vibrating feed port. Preferably, the motor is a variable frequency motor.

8. The Enshi Yu Lu intelligent fixing machine according to claim 1, characterized in that: A plurality of annular heating tubes are evenly arranged on the outer wall of the drum. The annular heating tubes are annular electric heating tubes and are spaced 30-40 cm apart from each other. A temperature and humidity sensor is installed inside the drum at a distance of 1-2 cm from the inner wall of the drum and is connected to a controller to automatically control the temperature of the drum fixing unit. The middle insulation layer is filled with aluminum silicate fiber and is located between the annular heating tube and the outer wall of the drum.

9. A method for fixing green tea of ​​the Enshi Yu Lu self-energizing fixing machine according to any one of claims 1 to 8, comprising feeding, far-infrared fixing, steam fixing, hot air fixing, drum fixing and the like, specifically comprising the following steps: Step A, turn on the controller switch, set the temperature of the far-infrared fixing unit, the steam fixing unit, the hot air fixing unit, and the drum fixing unit respectively, and adjust the inclination of the inclination-adjustable vibration conveyor; then turn on the far-infrared temperature control switch, the steam temperature control switch, the hot air temperature control switch, and the drum temperature control switch, collect the real-time temperature through the temperature sensor and compare it with the set temperature, and when the real-time temperature reaches the set temperature, the feeding conveyor starts feeding; Step B, putting the one-bud two-leaf tea leaves of No. 10 Hubei Tea selected as raw materials into the feeding conveyor to start feeding, the controller controls the feeding conveyor to feed, the tea leaves fall into the inclination-adjustable vibrating conveyor, and then enter the horizontal vibrating conveying platform and enter the far-infrared fixing unit for far-infrared fixing; when the infrared light-emitting tube of the photoelectric switch arranged at the feeding end of the inclination-adjustable vibrating conveyor is blocked by the tea leaves, the controller receives a signal that there are tea leaves on the inclination-adjustable vibrating conveyor, and at this time the controller controls the inclination-adjustable vibrating conveyor to vibrate; Step C, the tea leaves on the inclination-adjustable vibration conveyor begin to enter the horizontal vibration conveying platform. When the infrared light-emitting tube of the photoelectric switch arranged at the feeding end of the horizontal vibration conveying platform is blocked by the tea leaves, the controller receives a signal that there are tea leaves on the horizontal vibration conveying platform. At this time, the controller controls the vibration of the horizontal vibration conveying platform to make the tea leaves evenly dispersed. The tea leaves are then conveyed into the far-infrared fixing unit for pre-fixing. The temperature in the far-infrared fixing unit is controlled to reach 400-450° C. to start far-infrared fixing. At the same time, the steam boiler in the steam fixing unit is controlled to start conveying steam, and the dehumidifying fan is controlled to start. Step D: When the tea leaves that have completed far-infrared sterilization enter the steam sterilization unit, the steam boiler that has been turned on delivers steam through the pipeline to fill the steam sterilization unit, and at the same time, the dehumidification fan on the exhaust cover is turned on to dehumidify, and steam sterilization begins; After the steam killing is completed, the tea leaves enter the stainless steel conveyor vibration mesh belt platform of the lower hot air killing unit. When the infrared light-emitting tube of the photoelectric switch set at the feeding end of the stainless steel conveyor vibration mesh belt platform is blocked by the tea leaves, the controller receives a signal that there are tea leaves on the stainless steel conveyor vibration mesh belt platform. At this time, the controller controls the stainless steel conveyor vibration mesh belt platform to start running, and at the same time starts the hot air conveying pipeline and hot air blower, hot air furnace and hot air pipeline, respectively, to kill the tea leaves with hot air from the upper and lower parts, and the hot air fills the hot air killing unit. Step E, after the hot air killing is completed, the tea leaves enter the vibrating feed port of the drum killing unit on the third layer from the stainless steel conveying vibration mesh belt platform. When the infrared light-emitting tube of the photoelectric switch arranged at the feeding end of the vibrating feed port is blocked by the tea leaves, the controller receives a signal that there are tea leaves on the vibrating feed port. At this time, the controller controls the vibration of the vibrating feed port and starts the drum to start running. At this time, the tea leaves that have been killed by hot air fall into the drum from the discharge end of the vibrating feed port for drum killing. The water loss degree of the tea leaves in the drum is judged by the weight sensor installed under the drum by the drum bracket. If the tea leaves are over-killed, the drum speed or the feed amount of the vibrating feed port is increased. If the tea leaves are under-killed, the drum speed or the feed amount of the vibrating feed port is reduced until the weight of the tea leaves in the drum is maintained at the weight required for optimal killing.

10. The method for fixing the green leaves according to claim 9, characterized in that: The temperature collected by the temperature sensor is compared with the set temperature. The moisture content rapid detection sensor set at the drum outlet collects moisture content data and compares it with the set moisture content. The temperature change error and error change rate, moisture content change error and moisture content error change rate in the withering process are input into the controller, and the fuzzy control algorithm is used to achieve adaptive adjustment of process parameters such as temperature and leaf amount in the withering process.

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