Large intelligent clean high-hot air fixation machine

Abstract

The invention relates to a large intelligent clean high-hot air fixation machine which comprises a heat exchanger, a biomass particle combustion furnace, a tea feeding elevator, a fixed rack, a fixation roller, a water vapor dehumidification device, a waste heat recycling system and an intelligent control system, by arranging the waste heat recovery pipe, waste heat of high-temperature and high-humidity gas in the fixation roller and the moisture removal device is recovered into the heat exchanger, waste heat utilization is achieved, the equipment energy utilization efficiency is improved, the production cost is reduced, and resource waste and environmental pollution are reduced; a front wind shield, a middle wind shield and the like are arranged in the fixation roller to prevent the fresh tea leaves from being not thoroughly killed in the fixation process, so that the tea leaves can achieve an ideal fixation effect in a short time, and the green color of the fixation leaves is kept; an intelligent control algorithm is adopted, enzyme deactivating parameters are intelligently set, enzyme deactivating modes are selected, the enzyme deactivating process is intelligently and accurately controlled, and enzyme deactivating benefits are improved. All the surfaces in contact with the tea leaves are made of 304 stainless steel, so that clean fixation production is guaranteed.

Description

Technical Field

[0001] The present invention relates to a large-scale intelligent and clean high-temperature hot-air tea fixation machine, belonging to the technical field of primary agricultural product processing machinery, and more specifically, it is a fixation equipment in the tea processing link. Background Art

[0002] The main problem existing in the tea fixation link is that the leaves are easily over-fixed, but the stems require a higher temperature and are not easily over-fixed, resulting in the stems being over-fixed while the leaves are over-dried. To address the existing problems, the "large-scale intelligent and clean high-temperature hot-air tea fixation machine" using double fuzzy control technology has the advantages of effectively over-fixing fresh leaves, ensuring high fragrance of tea, and avoiding grassy smell. By detecting the fresh leaf feeding amount and fresh leaf grade in the fixation drum, applying fuzzy control rules for decision-making, and real-time adjusting the set values of the fixation time and fixation temperature, and embedding fuzzy PID control in the fixation temperature, precise control of the fixation temperature is achieved. It effectively solves the "pain points" and "difficult points" problems that the tea fixation method is affected by human factors and cannot achieve precise control.

[0003] The large-scale drum tea fixation machine has a large drum diameter and high spiral guide vane rib plates. The material has a long and large space for continuous turning and throwing in the drum, can fully mix with high-temperature hot air and exchange moisture, and achieve uniform moisture in the stems, buds, and leaves. At the same time, due to the large fixation space, it is conducive to the dissipation of grassy gas and water evaporation, promotes the formation of good aroma, makes the leaf quality soft and tough, facilitates rolling into shape, and the high-temperature hot air in the drum is in full and uniform contact with the fresh leaves, enabling the tea leaves to quickly absorb heat, increasing the leaf temperature, destroying and inactivating the oxidation enzymes in the fresh leaves, inhibiting the enzymatic oxidation of tea polyphenols and the like in the fresh leaves, and preventing color change during the drying process. The design can ensure that the tea reaches the ideal fixation effect in a short time and maintains the bright green color of the fixed tea leaves. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, and a large-scale intelligent and clean high-temperature hot-air tea fixation machine of an invention type is proposed. A waste heat recovery device is adopted. Under the negative pressure action of the large blower in the combustion furnace, cold air enters from the bottom of the fixation drum, and after sufficient heat exchange with the high-temperature and high-humidity discharge pipe and the outer wall of the fixation drum, it enters the heat exchanger in the hot blast stove through the waste heat recovery pipe. The tea leaves are transported from the discharge port of the feeding elevator to the feeding port of the fixation drum and enter the internal fixation drum. The rotation of the drum is driven by the rotation of the motor. The tea leaves in the high-temperature drum are continuously turned and thrown in the drum under the guidance of the spiral guide vane rib plates, fully mixed with high-temperature hot air and exchange moisture, and the fixed tea leaves are output from the discharge port. The high-temperature and high-humidity gas in the fixation drum, under the negative pressure action of the water vapor dehumidification blower, passes through the water vapor dehumidification pipe path from the discharge port, and is discharged into the atmosphere from the water vapor dehumidification pipe at the bottom of the fixation drum by the water vapor dehumidification blower.

[0005] To achieve the object of the present invention, the technical solution adopted is as follows:

[0006] A large-scale intelligent cleaning high-temperature hot air tea fixation machine, comprising a heat exchanger, a biomass pellet combustion furnace, a tea leaf feeding elevator, a fixed rack, a tea fixation drum and a water vapor dehumidification device, characterized in that it further comprises a waste heat recovery and utilization system based on the heat exchanger, the tea fixation drum and the water vapor dehumidification device and an intelligent control system based on a fuzzy PID + PLC intelligent control algorithm;

[0007] The heat exchanger is located at the back of the biomass pellet combustion furnace, the tea fixation drum is located on the right side of the biomass pellet combustion furnace, the tea leaf feeding elevator is located in front of the fixed rack, the water vapor dehumidification device is located at the bottom of the fixed rack, the waste heat recovery and utilization system is located at the top of the fixed rack, a hot air outlet is arranged on the surface of the biomass pellet combustion furnace, the feeding port of the tea fixation drum is communicated with the hot air outlet on the surface of the biomass pellet combustion furnace, heat-insulating cotton is arranged on the inner surface of the heat exchanger, and the air inlet of the large blower is communicated with a waste heat recovery pipe.

[0008] An outlet is arranged on the surface of the tea fixation drum, one end of the water vapor dehumidification device is communicated with the outlet, the water vapor dehumidification device comprises a water vapor inlet, a water vapor dehumidification pipe, a dehumidification blower and a water vapor discharge pipe, the water vapor dehumidification pipe is communicated on the left side of the water vapor inlet, and the left side of the water vapor dehumidification pipe is communicated with the water vapor discharge pipe through the dehumidification blower.

[0009] The tea fixation drum is installed in the fixed rack, and both ends of the tea fixation drum can rotate in the rack through a transmission system and rollers.

[0010] The waste heat recovery and utilization system is used to utilize the waste heat in the tea fixation process after heat exchange. The water vapor dehumidification pipe is placed at the bottom of the tea fixation drum, both the water vapor dehumidification pipe and the tea fixation drum are placed inside the rack, heat-insulating cotton is arranged on the outer side of the rack shell, and air is used as the gas heat exchange medium of the waste heat recovery system between the inner surface of the rack and the outer surfaces of the water vapor dehumidification pipe and the tea fixation drum.

[0011] Through the above technical solution, by deeply coupling the waste heat recovery and utilization system with the intelligent control system, not only the cascade recovery and efficient utilization of the waste heat from the fixing drum, heat exchanger and water vapor dehumidification device are realized, but also the hot air temperature, flow rate and dehumidification intensity are accurately regulated by means of the fuzzy PID+PLC intelligent algorithm. Combined with the design of using the air inside the frame as the heat exchange medium and the heat preservation cotton, a technical closed-loop of "thermal energy recycling - intelligent dynamic regulation - structural collaborative optimization" is formed. This design not only significantly reduces the energy consumption of the biomass pellet combustion furnace through waste heat recovery, but also improves the fixing uniformity and the stability of tea quality by means of intelligent control. At the same time, the modular layout and the roller drive system ensure the high-efficiency operation and maintenance convenience of the equipment.

[0012] As a further description of the above technical solution: The heat exchanger includes an upper heat exchange coil, a flue gas extraction motor I, a lower heat exchange coil, a combustion flue gas inlet, a heat exchange flue gas extraction motor II and a flue gas discharge outlet. The bottom of the upper heat exchange coil is connected to the flue gas extraction motor I, the bottom of the flue gas extraction motor I is connected to the lower heat exchange coil, the bottom of the lower heat exchange coil is connected to the combustion flue gas inlet, and the top of the upper heat exchange coil is connected to the flue gas discharge outlet through the heat exchange flue gas extraction motor II.

[0013] Through the above technical solution, by clarifying that the heat exchanger is composed of an upper heat exchange coil, a flue gas extraction motor I, a lower heat exchange coil, a combustion flue gas inlet, a heat exchange flue gas extraction motor II and a flue gas discharge outlet, and further defining the connection relationship of each component, the design of the flue gas flow path is clarified. This combined structure of hierarchical coils and double flue gas extraction motors can effectively extend the residence time of the flue gas and enhance the heat exchange efficiency. At the same time, through the precise layout of the combustion flue gas inlet and the flue gas discharge outlet, the orderly flow of the flue gas and the full recovery of waste heat are ensured. In addition, through the concretization of the structural features of this claim, the technical solution is more operable and has patent stability, facilitating subsequent product development and market promotion. At the industrialization level, the modular-designed heat exchanger is convenient for manufacturing, installation and maintenance.

[0014] As a further description of the above technical solution: The biomass pellet combustion furnace includes a furnace body. A pellet feeding hopper is arranged on the left side of the furnace body. The bottom of the pellet feeding hopper is connected to a pellet feeding motor. An auxiliary blower is arranged at the bottom of the furnace body. A vibration motor is arranged inside the auxiliary blower. A combustion tray is arranged on the surface of the inner wall of the furnace body. The bottom of the combustion tray is fixedly connected to the vibration motor. The air inlet of the biomass pellet combustion furnace is connected to the air outlet of the auxiliary blower. The air inlet of the large blower is connected to the waste heat recovery pipe.

[0015] Through the above technical solution, by clarifying the connection relationships between the furnace body and components such as the pellet feeding hopper, auxiliary blower, and vibration motor, not only the automatic feeding and vibration-assisted combustion mechanisms of the biomass pellet combustion furnace are revealed, but also its unique combustion tray design is demonstrated. This vibrating combustion tray structure can effectively prevent pellet accumulation and coking. Combined with the forced oxygen supply of the auxiliary blower, it ensures the full combustion of biomass pellets and improves the thermal efficiency. At the same time, the coordinated operation of the pellet feeding motor and the auxiliary blower realizes the precise control and stable energy supply during the combustion process. In addition, through the concretization of the structural features in this claim, the technical solution becomes more verifiable and patent-stable, facilitating subsequent product development and market promotion. At the industrial level, the modular-designed combustion furnace is convenient for manufacturing, installation, and maintenance. Combined with the waste heat recovery and utilization system and intelligent control system described in Claim 1, a complete heat energy supply system can be formed, significantly reducing equipment energy consumption and operating costs, and providing a clean, efficient, and intelligent technical solution for the tea processing industry.

[0016] As a further description of the above technical solution: The fixation drum includes a waste heat recovery pipe. A feeding hopper is provided at the bottom of the waste heat recovery pipe. A fixation drum is provided at the bottom of the feeding hopper. A transmission mechanism is provided at the bottom of the fixation drum. The feeding hopper is directly connected to the feeding elevator. A discharge port is installed and connected at the rear end of the fixation drum. A front wind baffle, a middle wind baffle, and a rear wind baffle are installed inside the fixation drum. A spiral guide vane rib plate is installed on the inner wall surface of the fixation drum. A small round hole is provided in the middle of the front wind baffle. The middle wind baffle and the rear wind baffle are placed at equal distances directly behind the front wind baffle. The middle wind baffle and the rear wind baffle are solid plates. A drum gap is provided at the connection between the front wind baffle, the middle wind baffle, and the rear wind baffle and the fixation drum. Among them, the settings of the front wind baffle, the middle wind baffle, and the rear wind baffle can reasonably block and guide the flow of hot air in the drum, enabling a reasonable air flow distribution to be formed in the drum. When the drum rotates, the spiral guide vane rib plate can promote the turning and tossing of the tea leaves in the drum, enabling the tea leaves to fully contact the hot air and improving the uniformity and efficiency of fixation.

[0017] Through the above technical solutions, by clarifying components such as the integrated waste heat recovery pipe, feed hopper, and transmission mechanism of the de-enzyming drum, and further revealing the collaborative design of the front windshield, middle windshield, rear windshield, and spiral guide vane rib plates inside it, not only is the precise regulation mechanism of the hot air flow path demonstrated (such as "small round holes are provided in the middle of the front windshield" and "the middle windshield and the rear windshield are placed at equal distances"), but also the optimized solution for the tea leaf tumbling path is revealed. This combined design of the stepped windshields and spiral guide vane rib plates can effectively guide the hot air to form a vortex air flow in the drum. Combined with the reasonable setting of the drum gap, it realizes the dynamic balance of hot air penetration and tea leaf tumbling, significantly improving the uniformity of de-enzyming; at the same time, the direct connection between the waste heat recovery pipe and the feed elevator ensures the feasibility of cascaded utilization of heat energy and continuous operation.

[0018] As a further description of the above technical solutions: The intelligent control system includes a human-machine interface touch screen, a fuzzy PID controller, a PLC intelligent controller, a temperature sensor, a humidity sensor, and a frequency converter. The de-enzyming parameters are set through the human-machine interface touch screen, and the automatic control de-enzyming mode or manual control de-enzyming mode is selected. The de-enzyming parameters include de-enzyming temperature, de-enzyming humidity, de-enzyming time, and de-enzyming frequency. The temperature sensor real-time detects the temperature signals in the heat exchanger, biomass pellet combustion furnace, de-enzyming drum, and water vapor dehumidification device. The humidity sensor real-time detects the humidity signals in the de-enzyming drum and the water vapor dehumidification device. The frequency converter real-time detects the working frequencies of the smoke extraction motor 1, heat exchange smoke extraction motor 2, large blower, pellet feeding motor, auxiliary blower, vibration motor, feed elevator, transmission mechanism, and water vapor dehumidification blower. The fuzzy PID controller calculates the corresponding control quantity through the fuzzy control algorithm according to the deviation between the actual temperature and humidity detected by the temperature sensor and humidity sensor and the set de-enzyming temperature and de-enzyming humidity. The PLC intelligent controller controls the rotation speeds of the smoke extraction motor 1, heat exchange smoke extraction motor 2, and large blower according to the control quantity output by the fuzzy PID controller, thereby adjusting the temperature and flow rate of the hot air, and controlling the rotation speed of the water vapor dehumidification blower to adjust the dehumidification amount, realizing the intelligent control of the de-enzyming process.

[0019] Through the above technical solution, the human-computer interaction interface touch screen, fuzzy PID controller, PLC intelligent controller and multiple types of sensors (temperature, humidity, frequency converter) are integrated to form a closed-loop control process of "parameter setting - signal acquisition - intelligent decision-making - precise execution". The flexible setting and mode switching of the green tea fixation parameters (temperature, humidity, time, frequency) are realized through the touch screen. With the cooperation of the temperature sensor and humidity sensor for real-time monitoring of key components (heat exchanger, combustion furnace, green tea fixation drum, moisture exhaust device), and the frequency detection of the motor equipment by the frequency converter, a comprehensive data acquisition network is constructed. The fuzzy PID controller dynamically calculates the control quantity using the fuzzy control algorithm based on the deviation between the collected data and the set value, and the PLC intelligent controller precisely adjusts the rotation speeds of each actuator (smoke extraction motor, large blower, moisture exhaust blower, etc.) according to the control quantity to achieve intelligent regulation of the hot air temperature, flow rate and moisture exhaust volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the axonometric structure schematic diagram of the large-scale intelligent and clean high-temperature hot air green tea fixation machine proposed by the present invention Figure 1 ;

[0021] Figure 2 is the axonometric structure schematic diagram of the large-scale intelligent and clean high-temperature hot air green tea fixation machine proposed by the present invention Figure 2 ;

[0022] Figure 3 is the connection schematic diagram of the hot blast stove air outlet and the drum green tea fixation machine of the large-scale intelligent and clean high-temperature hot air green tea fixation machine proposed by the present invention;

[0023] Figure 4 is the structure schematic diagram of the heat exchanger of the large-scale intelligent and clean high-temperature hot air green tea fixation machine proposed by the present invention;

[0024] Figure 5 is the structure schematic diagram of the biomass pellet combustion furnace of the large-scale intelligent and clean high-temperature hot air green tea fixation machine proposed by the present invention;

[0025] Figure 6 is the connection schematic diagram of the heat exchanger and the hot blast stove of the large-scale intelligent and clean high-temperature hot air green tea fixation machine proposed by the present invention;

[0026] Figure 7 is the partial structure schematic diagram of the inside of the furnace chamber of the biomass pellet combustion furnace of the large-scale intelligent and clean high-temperature hot air green tea fixation machine proposed by the present invention;

[0027] Figure 8 is the structure schematic diagram of the green tea fixation drum of the large-scale intelligent and clean high-temperature hot air green tea fixation machine proposed by the present invention;

[0028] Figure 9 is the partial structure schematic diagram of the inside of the green tea fixation drum of the large-scale intelligent and clean high-temperature hot air green tea fixation machine proposed by the present invention;

[0029] Figure 10 Schematic diagram of the internal structure of the tea fixation drum of the large-scale intelligent and clean high-temperature hot air tea fixation machine proposed by the present invention Figure 1 ;

[0030] Figure 11 Schematic diagram of the internal structure of the tea fixation drum of the large-scale intelligent and clean high-temperature hot air tea fixation machine proposed by the present invention Figure 2 ;

[0031] Figure 12 Schematic diagram of the structure of the water vapor moisture exhaust device of the large-scale intelligent and clean high-temperature hot air tea fixation machine proposed by the present invention;

[0032] Figure 13 Schematic diagram of the relationship between the drum and the waste heat recovery system of the large-scale intelligent and clean high-temperature hot air tea fixation machine proposed by the present invention;

[0033] Figure 14 Schematic diagram of the waste heat recovery gas circulation of the large-scale intelligent and clean high-temperature hot air tea fixation machine proposed by the present invention;

[0034] Figure 15 Schematic diagram of the control system framework structure of the large-scale intelligent and clean high-temperature hot air tea fixation machine proposed by the present invention;

[0035] Figure 16 Schematic diagram of the fuzzy PID control algorithm framework structure of the large-scale intelligent and clean high-temperature hot air tea fixation machine proposed by the present invention;

[0036] Figure 17 Schematic diagram of the touch screen mode selection interface of the large-scale intelligent and clean high-temperature hot air tea fixation machine proposed by the present invention;

[0037] Figure 18 Schematic diagram of the touch screen manual parameter setting interface of the large-scale intelligent and clean high-temperature hot air tea fixation machine proposed by the present invention;

[0038] Figure 19 Schematic diagram of the touch screen automatic mode interface of the large-scale intelligent and clean high-temperature hot air tea fixation machine proposed by the present invention.

[0039] Legend: 1. Heat exchanger; 2. Biomass pellet combustion furnace; 3. Feed elevator; 4. Frame; 5. Tea fixation drum; 6. Water vapor moisture exhaust device; 7. Waste heat recovery and utilization system; 8. Control system.

[0040] 11. Upper coil of heat exchanger; 12. Smoke extraction motor 1; 13. Combustion flue gas inlet; 14. Lower coil of heat exchanger; 15. Large fan; 16. Heat exchange smoke extraction motor 2; 17. Flue gas discharge outlet;

[0041] 21. Furnace body; 22. Granule feeding funnel; 23. Granule feeding motor; 24. Auxiliary blower; 25. Vibration motor; 26. Hot air outlet; 27. Combustion tray;

[0042] 51. Waste heat recovery pipe; 52. Feed funnel; 54. Transmission mechanism; 55. Front windshield; 56. Middle windshield; 57. Rear windshield; 58. Discharge port;

[0043] 61. Water vapor inlet; 62. Water vapor dehumidification pipe; 63. Water vapor discharge pipe; 64. Dehumidification fan. Detailed implementation manner

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Refer to Figure 1-19 , an embodiment provided by the present invention: A large-scale intelligent and clean high-temperature hot air green tea fixing machine, including a heat exchanger 1, a biomass particle combustion furnace 2, a tea leaf feeding elevator 3, a fixed frame 4, a fixing drum 5 and a water vapor dehumidification device 6, characterized in that it further includes a waste heat recovery and utilization system 7 based on the heat exchanger 1, the fixing drum 5 and the water vapor dehumidification device 6 and an intelligent control system 8 based on a fuzzy PID+PLC intelligent control algorithm;

[0046] The heat exchanger 1 is located on the back of the biomass particle combustion furnace 2, the fixing drum 5 is located on the right side of the biomass particle combustion furnace 2, the tea leaf feeding elevator 3 is located on the front of the fixed frame 4, the water vapor dehumidification device 6 is located at the bottom of the fixed frame 4, the waste heat recovery and utilization system 7 is located on the top of the fixed frame 4, a hot air outlet 26 is provided on the surface of the biomass particle combustion furnace 2, the feeding port of the fixing drum 5 is communicated with the hot air outlet 26 on the surface of the biomass particle combustion furnace 2, the surface of the inner wall of the heat exchanger 1 is provided with heat insulation cotton, and the air inlet of the large blower 15 is communicated with the waste heat recovery pipe 51.

[0047] A discharge port 58 is provided on the surface of the fixing drum 5, one end of the water vapor dehumidification device 6 is communicated with the discharge port 58, the water vapor dehumidification device 6 includes a water vapor inlet 61, a water vapor dehumidification pipe 62, a dehumidification fan 64, and a water vapor discharge pipe 63. The water vapor dehumidification pipe 62 is communicated on the left side of the water vapor inlet 61, and the left side of the water vapor dehumidification pipe 62 is communicated with the water vapor discharge pipe 63 through the dehumidification fan 64.

[0048] The fixing drum 5 is installed in the fixed frame 4, and both ends of the fixing drum 5 can rotate in the frame 4 through a transmission system and rollers.

[0049] The waste heat recovery and utilization system 7 is used to utilize the waste heat generated during the green tea fixing process after heat exchange. The water vapor exhaust pipe 62 is placed at the bottom of the green tea fixing drum 5. Both the water vapor exhaust pipe 62 and the green tea fixing drum 5 are placed inside the frame 4. The outer side of the frame 4 shell is provided with thermal insulation cotton. The air between the inner wall surface of the frame 4 and the outer surfaces of the water vapor exhaust pipe 62 and the green tea fixing drum 5 serves as the gas heat exchange medium for the waste heat recovery system.

[0050] Refer to Figure 1-19 , the heat exchanger 1 includes an upper heat exchange coil 11, a flue gas induction motor 12, a lower heat exchange coil 14, a combustion flue gas inlet 13, a second heat exchange flue gas induction motor 16, and a flue gas discharge port 17. The bottom of the upper heat exchange coil 11 is connected to the flue gas induction motor 12. The bottom of the flue gas induction motor 12 is connected to the lower heat exchange coil 14. The bottom of the lower heat exchange coil 14 is connected to the combustion flue gas inlet 13. The top of the upper heat exchange coil 11 is connected to the flue gas discharge port 17 through the second heat exchange flue gas induction motor 16. The biomass pellet combustion furnace 2 includes a furnace body 21. A pellet feeding hopper 22 is arranged on the left side of the furnace body 21. The bottom of the pellet feeding hopper 22 is connected to a pellet feeding motor 23. An auxiliary blower 24 is arranged at the bottom of the furnace body 21. A vibration motor 25 is arranged inside the auxiliary blower 24. The inner wall surface of the furnace body 21 is provided with a combustion tray 27. The bottom of the combustion tray 27 is fixedly connected to the vibration motor 25. The air inlet of the biomass pellet combustion furnace 2 is connected to the air outlet of the auxiliary blower 24. The air inlet of the large blower 15 is connected to the waste heat recovery pipe 51. The green tea fixing drum 5 includes a waste heat recovery pipe 51. A feeding hopper 52 is arranged at the bottom of the waste heat recovery pipe 51. A green tea fixing drum 5 is arranged at the bottom of the feeding hopper 52. A transmission mechanism 54 is arranged at the bottom of the green tea fixing drum 5. The feeding hopper 52 is directly connected to the feeding elevator 3. The rear end of the green tea fixing drum 5 is installed and connected with a discharge port 58. The front wind baffle 55, the middle wind baffle 56, and the rear wind baffle 57 are installed inside the green tea fixing drum 5. The spiral guide vane rib plate is installed on the inner wall surface of the green tea fixing drum 5. A small round hole is arranged in the middle of the front wind baffle 55. The middle wind baffle 56 and the rear wind baffle 57 are placed equidistantly directly behind the front wind baffle 55. The middle wind baffle 56 and the rear wind baffle 57 are solid plates. The connection parts of the front wind baffle 55, the middle wind baffle 56, and the rear wind baffle 57 with the green tea fixing drum 5 are provided with drum gaps. Among them, the settings of the front wind baffle 55, the middle wind baffle 56, and the rear wind baffle 57 can reasonably block and guide the flow of hot air in the drum, so that a reasonable air flow distribution is formed in the drum. When the spiral guide vane rib plate rotates with the drum, it can promote the turning and tossing of the tea leaves in the drum, enabling the tea leaves to fully contact with the hot air, and improving the uniformity and efficiency of the green tea fixing.

[0051] Refer to Figure 1-19The intelligent control system 8 includes a human-machine interactive interface touch screen, a fuzzy PID controller, a PLC intelligent controller, a temperature sensor, a humidity sensor and a frequency converter. The human-machine interactive interface touch screen is used to set the fixing parameters, select the automatic control fixing mode or the manual control fixing mode. The fixing parameters include the fixing temperature, fixing humidity, fixing time and fixing frequency. The temperature sensor detects the temperature signals in the heat exchanger 1, the biomass particle combustion furnace 2, the fixing drum 5 and the water vapor dehumidification device 6 in real time. The humidity sensor detects the humidity signals in the fixing drum 5 and the water vapor dehumidification device 6 in real time. The frequency converter detects the smoke induced motor 12, the heat exchange smoke induced motor 2, and the large fan 1 in real time. 5. The operating frequencies of the particle feeding motor 23, the auxiliary blower 24, the vibration motor 25, the feed elevator 3, the transmission mechanism 54 and the moisture dehumidification fan 64. The fuzzy PID controller calculates the corresponding control quantity through the fuzzy control algorithm according to the deviation between the actual temperature and humidity detected by the temperature sensor and the humidity sensor and the set withering temperature and withering humidity. The PLC intelligent controller controls the speed of the smoke induced motor 12, the heat exchange smoke induced motor 2 and the large fan 15 according to the control quantity output by the fuzzy PID controller, thereby adjusting the temperature and flow rate of the hot air, and controls the speed of the moisture dehumidification fan 64 to adjust the dehumidification amount, thereby realizing intelligent control of the withering process.

[0052] In a large-scale intelligent clean high-heat air fixing machine of the present invention, a waste heat recovery pipe 51 is installed above the frame 4, one end of the pipe mouth is connected to the rear of the frame 4, and the other end is connected to the top of the biomass particle combustion furnace 2. Under the negative pressure generated by the large fan 15 of the combustion furnace, the cold air enters from the bottom of the fixing drum 5, and after sufficient heat exchange with the water vapor dehumidification pipe 62 and the outer wall of the fixing drum 5, it enters the heat exchanger 1 in the hot air furnace through the waste heat recovery pipe 51, and is sent into the furnace in the combustion furnace through the inner wall of the furnace body 21, enters the furnace for high-temperature heating, and then is sent into the drum cavity of the drum fixing machine through the air duct. Three windshields are installed in the inner cavity of the fixing drum 5, and there is a small hole in the front windshield 55, and the middle windshield 56 and the rear windshield 57 are solid. There are gaps around the three windshields, and the gaps allow high-temperature hot air and fresh tea leaves to pass through. The gaps evenly spread the high-temperature hot air in the inner cavity of the fixing drum 5, so that the high-temperature hot air is fully in contact with the fresh tea leaves. The small hole in the middle of the front windshield 55 limits the wind speed. The high-temperature hot air passes through three windshields from front to back, which will gradually reduce the hot air temperature. The waste heat recovery device effectively realizes the waste heat utilization, improves the energy utilization efficiency of the equipment, reduces production costs, reduces resource waste and environmental pollution. The windshield in the withering drum 5 can prevent the fresh tea leaves from scorching and discoloring during the drying process, and can ensure that the tea leaves achieve the ideal withering effect in a short time, keeping the withering leaves green.

[0053] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A large-scale intelligent cleaning high-temperature hot air tea fixation machine, comprising a heat exchanger (1), a biomass pellet combustion furnace (2), a tea leaf feeding elevator (3), a fixed frame (4), a tea fixation drum (5) and a water vapor dehumidification device (6), characterized in that, It also includes a waste heat recovery and utilization system (7) based on a heat exchanger (1), a fixing roller (5) and a water vapor dehumidifying device (6), and an intelligent control system (8) based on a fuzzy PID + PLC intelligent control algorithm; The heat exchanger (1) is located at the back of the biomass pellet combustion furnace (2), the fixing roller (5) is located on the right side of the biomass pellet combustion furnace (2), the tea leaf feeding elevator (3) is located in front of the fixed frame (4), the water vapor dehumidifying device (6) is located at the bottom of the fixed frame (4), the waste heat recovery and utilization system (7) is located on the top of the fixed frame (4), a hot air outlet (26) is arranged on the surface of the biomass pellet combustion furnace (2), the feeding port of the fixing roller (5) is communicated with the hot air outlet (26) on the surface of the biomass pellet combustion furnace (2), heat insulation cotton is arranged on the inner wall surface of the heat exchanger (1), and the air inlet of the large blower (15) is communicated with a waste heat recovery pipe (51); An outlet (58) is arranged on the surface of the fixing roller (5), one end of the water vapor dehumidifying device (6) is communicated with the outlet (58), the water vapor dehumidifying device (6) includes a water vapor inlet (61), a water vapor dehumidifying pipe (62), a dehumidifying blower (64) and a water vapor discharge pipe (63), the water vapor dehumidifying pipe (62) is communicated on the left side of the water vapor inlet (61), and the left side of the water vapor dehumidifying pipe (62) is communicated with the water vapor discharge pipe (63) through the dehumidifying blower (64); The fixing roller (5) is installed in the fixed frame (4), and both ends of the fixing roller (5) can rotate in the frame (4) through a transmission system and rollers; The waste heat recovery and utilization system (7) is used to utilize the waste heat in the fixing process after heat exchange. The water vapor dehumidifying pipe (62) is placed at the bottom of the fixing roller (5), both the water vapor dehumidifying pipe (62) and the fixing roller (5) are placed inside the frame (4), heat insulation cotton is arranged on the outer side of the frame (4) shell, and air is used as the gas heat exchange medium for the waste heat recovery system between the inner wall surface of the frame (4) and the outer surfaces of the water vapor dehumidifying pipe (62) and the fixing roller (5).

2. The large intelligent cleaning high hot air fixation machine according to claim 1, characterized in that, The heat exchanger (1) includes an upper heat exchange coil (11), a smoke guiding motor 1 (12), a lower heat exchange coil (14), a combustion flue gas inlet (13), a heat exchange smoke guiding motor 2 (16) and a flue gas discharge port (17). The bottom of the upper heat exchange coil (11) is communicated with the smoke guiding motor 1 (12), the bottom of the smoke guiding motor 1 (12) is communicated with the lower heat exchange coil (14), the bottom of the lower heat exchange coil (14) is communicated with the combustion flue gas inlet (13), and the top of the upper heat exchange coil (11) is communicated with the flue gas discharge port (17) through the heat exchange smoke guiding motor 2 (16).

3. The large intelligent and clean high-temperature hot air fixation machine according to claim 1, wherein The biomass pellet combustion furnace (2) includes a furnace body (21). A pellet feeding hopper (22) is arranged on the left side of the furnace body (21). The bottom of the pellet feeding hopper (22) is connected to a pellet feeding motor (23). An auxiliary blower (24) is arranged at the bottom of the furnace body (21). A vibration motor (25) is arranged inside the auxiliary blower (24). A combustion tray (27) is arranged on the surface of the inner wall of the furnace body (21). The bottom of the combustion tray (27) is fixedly connected to the vibration motor (25). The air inlet of the biomass pellet combustion furnace (2) is connected to the air outlet of the auxiliary blower (24). The air inlet of the large blower (15) is connected to the waste heat recovery pipe (51).

4. The large intelligent and clean high hot air green tea fixing machine according to claim 1, wherein The tea - killing drum (5) includes a waste heat recovery pipe (51). A feeding hopper (52) is arranged at the bottom of the waste heat recovery pipe (51). The tea - killing drum (5) is arranged at the bottom of the feeding hopper (52). A transmission mechanism (54) is arranged at the bottom of the tea - killing drum (5). The feeding hopper (52) is directly connected to the feeding elevator (3). A discharge port (58) is installed and connected at the rear end of the tea - killing drum (5). A front wind - blocking plate (55), a middle wind - blocking plate (56) and a rear wind - blocking plate (57) are installed inside the tea - killing drum (5). A spiral guide vane rib plate (59) is installed on the inner wall surface of the tea - killing drum (5). A small round hole is arranged in the middle of the front wind - blocking plate (55). The middle wind - blocking plate (56) and the rear wind - blocking plate (57) are placed at equal distances directly behind the front wind - blocking plate (55). The middle wind - blocking plate (56) and the rear wind - blocking plate (57) are solid plates. A drum gap is arranged at the connection of the front wind - blocking plate (55), the middle wind - blocking plate (56) and the rear wind - blocking plate (57) and the tea - killing drum (5). Among them, the settings of the front wind - blocking plate (55), the middle wind - blocking plate (56) and the rear wind - blocking plate (57) can reasonably block and guide the flow of hot air in the drum, so that a reasonable air flow distribution is formed in the drum. When the drum rotates, the spiral guide vane rib plate (59) can promote the turning and tossing of the tea leaves in the drum, enabling the tea leaves to fully contact the hot air, and improving the uniformity and efficiency of tea - killing.

5. The large intelligent and clean high hot air fixation machine according to claim 1, characterized in that, The intelligent control system (8) includes a human-machine interface touch screen, a fuzzy PID controller, a PLC intelligent controller, a temperature sensor, a humidity sensor, and a frequency converter. The green tea fixation parameters are set through the human-machine interface touch screen, and the automatic control green tea fixation mode or the manual control green tea fixation mode is selected. The green tea fixation parameters include the green tea fixation temperature, the green tea fixation humidity, the green tea fixation time, and the green tea fixation frequency. The temperature sensor detects the temperature signals in the heat exchanger (1), the biomass pellet combustion furnace (2), the green tea fixation drum (5), and the moisture exhaust device (6) in real time. The humidity sensor detects the humidity signals in the green tea fixation drum (5) and the moisture exhaust device (6) in real time. The frequency converter detects the working frequencies of the smoke extraction motor one (12), the heat exchange smoke extraction motor two (16), the large blower (15), the pellet feeding motor (23), the auxiliary blower (24), the vibration motor (25), the feeding elevator (3), the transmission mechanism (54), and the moisture exhaust blower (64) in real time. The fuzzy PID controller calculates the corresponding control quantity through a fuzzy control algorithm according to the deviation between the actual temperature and humidity detected by the temperature sensor and humidity sensor and the set green tea fixation temperature and green tea fixation humidity. The PLC intelligent controller controls the rotation speeds of the smoke extraction motor one (12), the heat exchange smoke extraction motor two (16), and the large blower (15) according to the control quantity output by the fuzzy PID controller, so as to adjust the temperature and flow rate of the hot air, and controls the rotation speed of the moisture exhaust blower (64) to adjust the moisture exhaust volume, realizing the intelligent control of the green tea fixation process.

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