A continuous production line for exported Usnea tea

Abstract

The present invention discloses a continuous production line for export Luoshan tea, which includes a withering machine, a withering unit group, a fixing machine, a rolling unit group, a lump-breaking machine, a shaping and enzymolysis unit group, a shaping and enzymolysis unit group, a color sorting, impurity removal and grading machine, and a blending, leveling and aroma-enhancing integrated machine that are sequentially connected through a conveying device. In view of the demand characteristics of export Luoshan tea, the present invention has developed and designed a continuous production line for export Luoshan tea. The shape of the export Luoshan tea obtained through this production line and its processing steps is "spiral", the color is dark brown, the tea soup is dark yellow and reddish brown, the taste is strong, mellow and sweet, and it contains a strong sweet aroma, thus solving the problem that traditional export tea is blended with black tea and green tea, resulting in a poor overall appearance of the tea and difficulty in ensuring the consistency of the taste. It can be widely applied to the technical field of "spiral" tea processing.

Description

Technical Field

[0001] The present invention relates to the technical field of tea processing, and in particular to a continuous production line for exported Songluo tea. Background Art

[0002] Songluo tea is a famous tea in Chinese history, belonging to the stir-fried green tea category. It was created in the early Ming Dynasty and is one of the main exported teas in China, with an annual export volume of up to about 30,000 tons. However, in recent years, the international tea market has changed. Most of the major importing countries of green tea tend to import spiral teas with dark brown appearance, deep yellowish-red brown tea soup, strong and mellow taste with a sweet aftertaste, and a strong sweet fragrance. Therefore, the export volume of traditional-flavored Songluo green tea has also been deeply affected. In order to stabilize and gain a larger foreign market and strive for a larger export volume, the existing method is to blend different proportions of green tea and black tea according to the customer's demand for taste concentration, so as to achieve the taste preferred by customers. However, the taste of the tea obtained by this method is difficult to be unified, and the tea is a mixture of red and green, with a poor appearance. Therefore, it is necessary to improve the existing processing technology and production line of Songluo green tea to be able to produce exported Songluo tea that meets the export taste. Summary of the Invention

[0003] The purpose of the present invention is to provide a continuous production line for exported Songluo tea, which solves the problems that the existing exported tea is blended with green tea and black tea, has a poor appearance, and it is difficult to ensure the consistency of taste.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a continuous production line for exported Songluo tea, including a shaking machine, a withering unit, a fixing machine, a rolling unit, a lump-breaking machine, a shaping enzyme hydrolysis unit, a shaping enzyme hydrolysis unit, a color sorting, impurity removal and grading machine, and a blending, uniform piling and flavor enhancing integrated machine, which are sequentially connected by a conveying device;

[0005] The withering unit includes a group of tea impurity removal and withering integrated machines arranged side by side. The tea impurity removal and withering integrated machine includes a withering trough. A rotary conveyor belt for transporting tea is arranged at the bottom of the withering trough. An inlet conveyor belt for transporting tea into the withering trough is also arranged at the feed end of the withering trough. A group of negative ion fans are arranged at intervals above the inlet conveyor belt. The negative ion fans are connected to a debris collection bag through a pipeline; an electromagnetic impurity removal roller is also arranged below the air inlet of the negative ion fan;

[0006] The blending, uniform piling and flavor enhancing integrated machine includes a blending and uniform feeding conveying device, a uniform feeding and impurity removal tank, a flavor enhancing, sterilizing and uniform piling roller, and an outlet impurity removal vibrating trough connected in sequence;

[0007] The blending and uniform feeding device includes a group of weighing and feeding belts. A batching hopper is arranged at the discharge end of the weighing and feeding belts. A batching device for mixing and stirring tea leaves is arranged in the batching hopper. The discharge end of the batching hopper is connected with a uniform feeding conveyor belt. A group of first turning devices for turning and mixing tea leaves are arranged at intervals on the uniform feeding conveyor belt. The discharge port of the uniform feeding conveyor belt is docked with the feeding port of the uniform material removing and impurity removing cylinder.

[0008] The uniform material removing and impurity removing cylinder includes a cylindrical cylinder body, a screen bottom cover and a screen upper cover which are respectively arranged at the bottom and top of the cylinder body and can be opened and closed. A first negative ion fan is arranged on the screen upper cover. The first negative ion fan is connected with a first sundry collecting bag. A uniform material device is also arranged in the cylinder body. The discharge port of the uniform material removing and impurity removing cylinder is docked with the feeding port of the flavor enhancing, sterilizing and uniform piling drum.

[0009] The flavor enhancing, sterilizing and uniform piling drum includes a drum body and an electromagnetic heating device arranged below the drum body. The discharge port of the flavor enhancing, sterilizing and uniform piling drum is docked with the discharge and impurity removing vibrating trough. The discharge and impurity removing vibrating trough includes a trough body and a vibrator for driving the trough body to vibrate. The bottom plate of the trough body is of a 12-mesh screen structure.

[0010] To rapidly cool the tea leaves, a spreading conveyor belt is arranged below the discharge port of the tea greening machine, and a cooling fan is arranged on the spreading conveyor belt.

[0011] Specifically, the rolling unit includes a rolling frame, a group of rolling machines arranged side by side on the rolling frame. A batching traveling crane is arranged on the rolling frame. A batching conveyor belt is arranged on the batching traveling crane. A blanking cylinder is arranged below the discharge end of the batching conveyor belt. A material distributing device is arranged in the blanking cylinder. A flexible skirt is arranged below the blanking cylinder and extends into the rolling barrel of the rolling machine. A vibrating conveying trough is arranged below the tea discharging port of the rolling machine. The vibrating conveying trough is arranged obliquely downward at an angle of 5-7°. A comb-shaped filter is arranged at the discharge end of the vibrating output trough.

[0012] To facilitate automatic rolling, a rolling feeding conveyor belt is arranged between the spreading conveyor belt and the batching conveyor belt. A composite saccharifying enzyme adding device and a turning roller are arranged on the rolling feeding conveyor belt.

[0013] Preferably, the withering machine is a DL-6CZQ-110 type tea withering machine; the tea greening machine is a 6CST-80-ZF type electric heating and hot air tea greening machine; the lump breaking machine is an electromagnetic roller lump breaking machine, including an electromagnetic roller body and spiral guide vanes arranged in the electromagnetic roller body; the color sorting, impurity removing and grading machine is a DT7C6 type tea color sorter.

[0014] To improve the shaping effect of tea processing, the rolling and enzymolysis unit includes a group of 6CCGQ-60 double-pot curly tip drying machines. The diameter of the pot mouth of the 6CCGQ-60 double-pot curly tip drying machine is 60 cm, and the depth of the pot is 25 cm. The shaping and enzymolysis unit includes a group of 6CCGQ-50 double-pot curly tip drying machines. The diameter of the pot mouth of the 6CCGQ-50 double-pot curly tip drying machine is 50 cm, and the depth of the pot is 23 cm.

[0015] Furthermore, the 6CCGQ-60 double-pot curly tip drying machines are arranged in two rows and opposite to each other. Above the 6CCGQ-60 double-pot curly tip drying machines, there is a first feeding gantry. A first feeding conveyor belt is arranged on the first feeding gantry. Below the discharge port of the first feeding conveyor belt on the first feeding gantry, there is a first batching conveyor belt that can rotate forward and backward. Below the discharge ports of the two rows of 6CCGQ-60 double-pot curly tip drying machines, there is a first discharge conveyor belt. The 6CCGQ-50 double-pot curly tip drying machines are arranged in two rows and opposite to each other. Above the 6CCGQ-50 double-pot curly tip drying machines, there is a second feeding gantry. A second feeding conveyor belt is arranged on the second feeding gantry. Below the discharge port of the second feeding conveyor belt on the second feeding gantry, there is a second batching conveyor belt that can rotate forward and backward. Below the discharge ports of the two rows of 6CCGQ-50 double-pot curly tip drying machines, there is a second discharge conveyor belt.

[0016] To facilitate enzyme-added withering, above the feeding end of the withering trough, there is also a material leveling hopper. The bottom of the material leveling hopper is a flat discharge port adapted to the width of the rotary conveyor belt. Above the material leveling hopper, there is an ultrasonic enzyme applicator. The atomizing nozzle of the ultrasonic enzyme applicator is aimed at the inside of the material leveling hopper. Inside the material leveling hopper, there is also a material leveler. The material leveler includes a material leveling rotating shaft and a group of material leveling claws installed staggeredly on the material leveling rotating shaft.

[0017] To further remove impurities, an outer cover is also provided on the trough body. A second negative ion fan is provided on the outer cover. The second negative ion fan is connected to a second debris collection bag.

[0018] To facilitate the distribution of the tea leaves in the shaking machine to each tea leaf impurity removal and withering integrated machine, below the discharge end of the shaking machine, there is a vibrating batching trough. The vibrating batching trough is arranged at a downward slope of 7-9°. At the bottom of the vibrating batching trough, there is a group of blanking holes corresponding to the tea leaf impurity removal and withering integrated machines one by one, and the blanking holes are located above the feeding end of the feeding conveyor belt. A blanking valve is arranged in the blanking holes. Inside the vibrating batching trough, there is also a group of partition plates that block one side of the blanking holes and can move up and down.

[0019] Advantages of the present invention: The exported Usnea tea produced by this production line has a "spiral" shape, a dark brown color, a deep yellowish-red-brown tea soup, a strong and mellow taste with a sweet aftertaste, and a strong sweet fragrance. This exported Usnea tea neither belongs to traditional green tea nor black tea, but is a new type of tea between green tea and black tea. In the specific equipment, a "convex-ridge shaking cage" shaking machine is used for rapid shaking to damage the leaf margin cells, which is beneficial for the subsequent exogenous cellulase to enter the inner layer of the buds and leaves for the photothermal withering enzymatic hydrolysis reaction. The tea impurity removal and withering integrated machine realizes the automatic continuous operation of enzyme addition and withering, reduces the cost of manual operation. At the same time, the tea is decontaminated before withering, thus avoiding the impurities carried in the tea from participating in the withering reaction and affecting the taste quality of the tea. The lumping machine uses an AFY-600 type electromagnetic roller drying machine, which directly heats the cylinder through electromagnetic radiation. Therefore, compared with general lumping machines, not only is the thermal efficiency as high as over 28%, but also the water evaporation is 10 - 12% faster, the lumping looseness is increased by 8 - 10%, and it is also beneficial for the conversion and formation of tea polysaccharide composite products. The shaping and sizing are prepared by double-pot curly tip drying machines of two specifications, and the obtained tea is tight, heavy, uniform, and has a strong high-sugar sweet fragrance. At the same time, a vibrating screen is correspondingly arranged below the 6CCGQ-60 type double-pot curly tip drying machine to sieve out the broken ends during shaping, which can effectively avoid the generation of burnt taste during tea shaping and affecting the tea quality. The blending, uniform piling, and flavor enhancing integrated machine can not only enhance the flavor and sterilize the tea, but also solve the technical problems of the existing box-type blending and uniform piling machine, which cannot evenly mix and pile the "spiral" tea and is difficult to remove the hairs carried in the spiral tea.

[0020] The present invention will be described in more detail below with reference to the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a block diagram of the production line of the present invention.

[0022] Figure 2 It is a front view schematic diagram of the connection structure of each unit in the production line of the present invention.

[0023] Figure 3 It is a top view of the production line of the present invention.

[0024] Figure 4 It is a schematic diagram of the structure of the vibrating batching tank in the present invention.

[0025] Figure 5 It is an assembly schematic diagram of the partition board in the present invention.

[0026] Figure 6 It is a schematic diagram of the structure of the tea impurity removal and withering integrated machine in the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the material distributor in the present invention.

[0028] Figure 8 This is a schematic structural diagram of the rolling unit in the present invention.

[0029] Figure 9 This is a schematic structural diagram of the comb-shaped filter in the present invention.

[0030] Figure 10 This is a schematic structural diagram of the material turning roller in the present invention.

[0031] Figure 11 This is a schematic structural diagram of the spiral guide vane rib in the present invention.

[0032] Figure 12 This is a schematic structural diagram of the blending, leveling and flavor-enhancing integrated machine in the present invention.

[0033] Figure 13 This is a schematic structural diagram of the rotating structure of the weighing bottom plate in the present invention.

[0034] Figure 14 This is a schematic position diagram of the flexible rubber retaining ring in the present invention.

[0035] Figure 15 This is a schematic structural diagram of the batching device in the present invention.

[0036] Figure 16 This is a schematic structural diagram of the first material turning device in the present invention.

[0037] Figure 17 This is a schematic structural diagram of the flavor-enhancing, sterilizing and leveling drum in the present invention.

[0038] Figure 18 This is a schematic structural diagram of the discharging and impurity-removing vibrating trough in the present invention.

[0039] Figure 19 This is a schematic assembly position diagram of the spiral guide vane rib in the present invention. Detailed implementation manners

[0040] Example 1, as Figures 1 to 19As shown in the figure, a continuous production line for export Pinus massoniana tea includes a withering machine 1, a withering unit 2, a de-enzyming and fixing machine 3, a rolling unit 4, a lump-breaking machine 5, a shaping and de-enzyming unit 6, a shaping and de-enzyming unit 7, a color sorting, impurity removing and grading machine 8, and a blending, even piling and fragrance enhancing machine 9, which are sequentially connected through a conveying device. The withering machine 1, the withering unit 2 and the de-enzyming and fixing machine 3 form a withering, de-enzyming and fixing module; the rolling unit 4, the lump-breaking machine 5, the shaping and de-enzyming unit 6 and the shaping and de-enzyming unit 7 form a rolling, lump-breaking, shaping, shaping and de-enzyming module; and the color sorting, impurity removing and grading machine 8 and the blending, even piling and fragrance enhancing machine 9 form an impurity removing, grading, fragrance enhancing, sterilizing, blending and even piling module. Through the connection of the above equipment, a continuous production line for export Pinus massoniana tea is obtained to meet the processing requirements of existing export Pinus massoniana tea, and to solve the problems that the appearance of tea leaves is poor and the taste consistency is difficult to guarantee when the existing export Pinus massoniana tea is blended with green tea and black tea.

[0041] The layout and connection relationship of this production line will be specifically described below in combination with the processing process of export Pinus massoniana tea.

[0042] First of all, fresh leaf raw materials are sent to the withering machine 1 through a conveyor belt for withering. One withering machine 1 is provided, and preferably a DL-6CZQ-110 type tea withering machine is used, which can wither tea fresh leaves intelligently. The purpose of configuring the withering machine in the production line is to destroy the cell structure at the leaf margin through intelligent withering, which is beneficial for exogenous bioenzymes in the subsequent process to penetrate deep into the inner layer of buds and leaves for photothermal withering and de-enzyming reactions.

[0043] The tea leaves shaken by the shaking machine 1 are conveyed to the withering unit 2 for photothermal withering enzymatic hydrolysis reaction. The withering unit 2 includes 4 tea leaf impurity removal and withering integrated machines 21 arranged side by side. The tea leaf impurity removal and withering integrated machine 21 includes a withering trough 211 and a feeding conveyor belt 213 arranged at the front end of the withering trough 211. Below the discharge port of the shaking machine 1, there is a vibrating batching trough 10, which is horizontally arranged above the feeding ends of the feeding conveyor belts 213 of the 4 tea leaf impurity removal and withering integrated machines 21 and is inclined upward at 7-9°, and is docked with the discharge port of the shaking machine 1. At the bottom of the vibrating batching trough 10, there is a blanking hole 101 corresponding to each feeding conveyor belt 213, and a blanking valve 102 is arranged in the blanking hole 101. The diameter of the blanking hole 101 is adapted to the width of the vibrating batching trough 10. By controlling the opening and closing of each blanking valve 102, the feeding to different feeding conveyor belts 213 can be controlled. To further overcome the interference between each other, a partition plate 103 that can move up and down is arranged between two adjacent blanking holes 101 of the vibrating batching trough 10. Specifically, a pushing cylinder 104 for driving the partition plate 103 to move up and down is fixedly arranged on the outer wall of the vibrating batching trough 10, and the movable end of the pushing cylinder 104 is fixedly connected to the partition plate 103. When the first blanking hole 101 discharges materials, the partition plate 103 between the first and second blanking holes is closed, and the tea leaves fall from the first blanking hole 101. When the second blanking hole 101 discharges materials, the blanking valve 102 below the first blanking hole 101 is closed, the blanking valve 102 below the second blanking hole 101 is opened, and at the same time, the partition plate 103 between the second blanking hole and the third blanking hole is closed, and the partition plate between the first blanking hole and the second blanking hole is opened, so that the tea leaves can smoothly enter the position of the second blanking hole and fall. And so on, the discharging of the third and fourth blanking holes is realized.

[0044] The vibrating batching trough 10 is driven by a driving device 105 to vibrate up and down for feeding. The driving device 105 includes a vibrating motor 1051, an eccentric wheel 1052 installed on the output shaft of the vibrating motor 1051. There is a rocker 1053 between the eccentric wheel 1052 and the vibrating batching trough 10. One end of the rocker 1053 is eccentrically installed on the eccentric wheel 1052, and the other end is installed on the bottom mounting seat of the vibrating batching trough 10 through a movable pin. When the vibrating motor 1051 rotates, it drives the eccentric wheel 1052 to rotate, thereby driving the vibrating batching trough 10 to vibrate up and down. The vibration frequency of the vibrating batching trough 10 can be controlled by controlling the rotation speed of the vibrating motor 1051. The present invention is not limited to the above driving device, as long as it can drive the vibrating batching trough to vibrate, and no examples are given one by one here.

[0045] The specific structure of the tea impurity removal and withering integrated machine 21 is described as follows: It includes a withering trough 211. At the bottom of the withering trough 211, there is a rotary conveyor belt 212 for transporting tea leaves. The rotation of the rotary conveyor belt 212 drives the tea leaves in the withering trough 211 to be conveyed forward. At the feeding end of the withering trough 211, there is also a feeding conveyor belt 213 for conveying tea leaves into the withering trough 211, thereby realizing automatic feeding. The feeding conveyor belt 213 is rotatably installed on the feeding frame 2114 and is a 10-mesh stainless steel screen conveyor belt, arranged obliquely upward. On both sides of the feeding frame 2114, there are baffles 217, thus forming a conveying trough, and the feeding conveyor belt 213 is arranged at the bottom of the conveying trough.

[0046] In order to keep the tea leaves clean when entering the withering trough 211, two negative ion fans 214 are spaced above the feeding conveyor belt 213. The negative ion fans 214 are connected with a sundry collection bag 215. By using the secondary suction effect of the ion wind, the insect bodies, hairs, fibers, yellow tea flakes, and dust entrained in the fresh tea leaves are sucked out and collected into the sundry collection bag 215. The sundry collection bag 215 is a nylon bag with a flared opening, and the bag mouth is tightly sleeved on the back of the negative ion fan, and the sundries are sucked and collected by it.

[0047] To further remove the metal impurities mixed in the tea leaves, an electromagnetic impurity removal roller 216 is also arranged below the air inlet of the negative ion fan 214; the electromagnetic impurity removal roller 216 is rotatably installed on the baffle 217. The metal impurities in the tea leaves are sucked away by the electromagnetic impurity removal roller 216 and hung on the electromagnetic impurity removal roller 216. When it is necessary to clean the metal impurities on the electromagnetic impurity removal roller 216, the negative ion fan 214 is turned on, and the power supply on the electromagnetic impurity removal roller 216 is turned off. The magnetic force of the electromagnetic impurity removal roller 216 disappears, and under the suction of the negative ion fan 214, the metal impurities are sucked into the sundry collection bag 215. The electromagnetic impurity removal roller is a prior art. It generates magnetic force when powered on and the magnetic force disappears when powered off, and will not be described in detail here.

[0048] To facilitate automatic enzyme addition and mixing, a material leveling hopper 218 is further provided above the feeding end of the withering trough 211. The material leveling hopper 218 is located below the discharge opening of the feeding conveyor belt 213 to catch the tea leaves on the feeding conveyor belt 213. The bottom of the material leveling hopper 218 is a flat discharge opening adapted to the width of the rotary conveyor belt 212. When the withering trough 211 is feeding, the rotary conveyor belt 212 in the withering trough 211 slowly moves forward until the entire withering trough 211 is covered with tea leaves. Then the rotary conveyor belt 212 stops rotating and the material leveling hopper 218 stops discharging, so as to realize automatic feeding. An ultrasonic enzyme applicator 219 is provided above the material leveling hopper 218. The ultrasonic enzyme applicator 219 preferably uses a commonly used ultrasonic humidifier on the market. The atomizing nozzle of the ultrasonic enzyme applicator 219 is aimed at the inside of the material leveling hopper 218. A material leveler 2110 is also provided inside the material leveling hopper 218. The material leveler 2110 includes a material leveling rotating shaft 21101 and a group of material leveling claws 21102 misaligned and installed on the material leveling rotating shaft 21101. The material leveling claws 21102 turn the tea leaves by rotating the material leveling rotating shaft 21101, so that the tea leaves are fully mixed with the enzyme.

[0049] The withering trough 211 is made of stainless steel, with a length of 10M, a width of 0.8M, a height of 1.2M, and a trough depth of 0.8M. The rotary conveyor belt 212 is a mesh conveyor belt made of 12-mesh stainless steel material, which carries the fresh tea leaves for photothermal withering, enzymatic hydrolysis reaction, and feeding and discharging transportation. An air inlet chamber 2111 is provided at the bottom of the withering trough 211. One end of the air inlet chamber 2111 is closed, and the other end is connected with a blowing device 2113 to blow cold and hot air into the air inlet chamber 2111. To ensure the uniformity of the air inlet in the withering trough 211, the bottom plate of the air inlet chamber 2111 is arranged obliquely upward, so that the height of the air inlet chamber 2111 gradually decreases from the air inlet end to the end. At the same time, a group of flow disturbance patterns 2115 are also provided on the bottom plate of the air inlet chamber 2111, so that the hot air blows towards the withering trough in a wave shape.

[0050] The blowing device 2113 includes a heating chamber 21131, a blower 21132 disposed at one end of the heating chamber 21131, and a hot air conversion chamber 21133 disposed at the other end of the heating chamber 21131. The air outlet of the hot air conversion chamber 21133 is docked with one end of the air inlet chamber 2111. The heating chamber 21131 is of a rectangular cast iron structure, and is equipped with far-infrared heating plates with a total power of 40 kw indoors, which are divided into 4 groups and arranged in an overlapping manner. A circular electric heating channel is provided at the front end of the heating chamber 21131, which leads directly to the hot air conversion chamber 21133. In order to keep warm and save energy, an asbestos heat insulation protection cover for preventing electric heat diffusion is also provided outside the heating chamber 21131. The hot air conversion chamber 21133 is of a spherical structure, and a plurality of air outlets are provided on the hot air conversion chamber 21133, which can be docked with the air inlet chambers 2111 of multiple withering troughs 1. The function of the hot air conversion chamber 21133 is to rotate and convert the hot air blown by the blower into hot air with a balanced temperature in the hot air conversion chamber 21133, and then through the multiple air outlets on the hot air conversion chamber 21133, it is transported to the air inlets of the air inlet chambers 2111 of each withering trough 1 to output hot air with a relatively balanced temperature. The blower 132 is a 4-72-15 type centrifugal ventilator.

[0051] Above the withering trough 211, a set of LED plant supplementary lights 2112 are also arranged at intervals, with a total of 5 lamps, each lamp spaced 1.8 m apart, and installed at a position 65-75 cm above the withering trough 1. By emitting red light, the photothermal withering of tea leaves is carried out.

[0052] The withered tea leaves are sent into a de-enzyming and withering integrated machine 3 for de-enzyming. One de-enzyming machine 3 is provided. A first horizontal conveyor belt 12 is provided at the discharge end of the tea leaf impurity removal and withering integrated machine 21. A first elevator 13 is provided between the discharge end of the first horizontal conveyor belt 12 and the feed end of the de-enzyming machine 3. The withered tea leaves are sent into the de-enzyming machine 3 through the first horizontal conveyor belt 12 and the first elevator 13.

[0053] The de-enzyming machine 3 preferably adopts a 6CST-80-ZF type electric heat and hot air tea de-enzyming machine, and uses the "double heat" of electric heat and hot air for short-time medium-temperature de-enzyming. The benefits of adopting short-time medium-temperature de-enzyming: inhibiting the activity of polyphenol oxidase and preventing the redening reaction to produce the quality and flavor of green tea, while still retaining the activity of cellulase to enable it to continue the enzymatic hydrolysis reaction to form more tea polysaccharide compounds. The electric heat and hot air tea de-enzyming machine performs "double heat de-enzyming" through an electric heating drum and blowing hot air, which can improve the thermal efficiency by 4-6% and shorten the de-enzyming time by 10-15% compared with general tea de-enzyming machines, and there is no smoky and charred buds and leaves. A spreading conveyor belt 31 is provided at the discharge end of the de-enzyming machine 3, and 2 cold air blowers 32 are arranged on the spreading conveyor belt 31. Through the spreading conveyor belt 31, the temperature of the de-enzymed leaves can be quickly reduced to 55-60 °C, which is more conducive to the subsequent enzyme-added rolling and enzymatic hydrolysis reaction.

[0054] The tea leaves after being withered by the withering machine 3 are conveyed to the rolling unit 4 for rolling. The rolling unit 4 includes a rolling machine frame 41, four rolling machines 42 arranged side by side on the rolling machine frame 41. The rolling machine 42 is preferably a 6CR-65 type tea rolling machine. A batching traveling crane 43 is arranged on the rolling machine frame 41, and a batching conveyor belt 44 is arranged on the batching traveling crane 43. The batching traveling crane 43 moves back and forth on the rolling machine frame 41, so that the discharge port of the batching conveyor belt 44 is located above different rolling machines 42. By rotating the batching conveyor belt 44, the tea leaves on the batching conveyor belt 44 fall into the rolling barrels of the rolling machines 42 below. To prevent the tea leaves from spilling out of the rolling barrel, a blanking cylinder 45 is arranged below the discharge end of the batching conveyor belt 44. A distributor 46 is arranged in the blanking cylinder 45 to disperse the tea leaves so that the tea leaves fall evenly into the rolling barrel. A flexible skirt 451 extending into the rolling barrel of the rolling machine 42 is arranged below the blanking cylinder 45. When moving, the flexible skirt 451 is deformed under pressure and disengages from the rolling barrel, thus not affecting the normal operation of the batching traveling crane 43. A rolling feed conveyor belt 47 is arranged between the spreading conveyor belt 31 and the batching conveyor belt 44. A compound glucoamylase adding device 48 and a turning roller 49 are arranged on the rolling feed conveyor belt 47. The compound glucoamylase adding device 48 adds compound glucoamylase to the tea leaves and mixes them evenly through the turning roller 49. The compound glucoamylase adding device 48 is an ultrasonic atomizer, and a group of turning claws 491 are arranged on the turning roller 49.

[0055] A vibrating output chute 14 is arranged below the discharge port of the rolling machine 42. The vibrating output chute 14 is arranged to slope downward at an angle of 5-7°. The driving structure of the vibrating output chute 14 is the same as that of the vibrating batching chute 10 and will not be described repeatedly here. A comb-shaped filter 141 is arranged at the discharge end of the vibrating output chute 14. Through the filtering of the comb-shaped filter 141, the larger tea lumps are vibrated and loosened on the comb-shaped filter 141 along with the vibrating output chute 14 and then output, avoiding the problem that the large tea lumps are difficult to be completely loosened on the lump breaker 5.

[0056] A second elevator 15 is arranged between the discharge end of the vibration output groove 14 and the feed end of the block disintegrator 5. The rolled tea leaves are fed into the block disintegrator 5 for block disintegration and enzymatic hydrolysis and saccharification reactions. The block disintegrator 5 is an electromagnetic drum block disintegrator, which includes an electromagnetic drum body 51 and configured electromagnetic devices, temperature control devices, moisture discharge devices and other components. In addition, spiral guide vanes 52 are provided on the inner wall of the electromagnetic drum body 51. The spiral guide vanes 52 are arranged along the axial direction of the electromagnetic drum body 51. The surface of the spiral guide vanes 52 is a strip structure with a threaded concave-convex structure. There are 3 in total, and they are arranged at intervals inside the electromagnetic drum for direct heating and block disintegration. The electromagnetic drum block disintegrator uses electromagnetic heating of the drum body and the spiral guide vanes 52 for dynamic block disintegration and enzymatic hydrolysis reactions, which can not only accelerate the volatilization of moisture by 10-12%, improve the looseness of block disintegration by 8-10%, but also facilitate the conversion and formation of tea polysaccharides.

[0057] The tea leaves that have been disintegrated and enzymatically hydrolyzed by the block disintegrator 5 are sent to the shaping and enzymatic hydrolysis unit 6 for frying of "spiral tea" and saccharification reaction of compound saccharifying enzyme. The shaping and enzymatic hydrolysis unit 6 includes 10 6CCGQ-60 double-pot curly tip frying machines 61. Above the 10 6CCGQ-60 double-pot curly tip frying machines 61, there is a first feeding traveling crane 62 that moves back and forth. A first feeding conveyor belt 63 is arranged on the first feeding traveling crane 62. A third elevator 16 is arranged between the discharge end of the block disintegrator 5 and the first feeding conveyor belt 63. The 10 6CCGQ-60 double-pot curly tip frying machines 61 are symmetrically arranged in two rows. The first feeding traveling crane 62 is provided with a first batching conveyor belt 64 that can rotate forward and backward below the discharge port of the first feeding conveyor belt 63. The two discharge ends of the first batching conveyor belt 64 are respectively located above the pot mouths of the 6CCGQ-60 double-pot curly tip frying machines 61 on both sides. Feeding of the 6CCGQ-60 double-pot curly tip frying machines 61 on both sides is achieved by the forward and reverse rotation of the first batching conveyor belt 64. A first discharge conveyor belt 65 is arranged below the discharge port of the 6CCGQ-60 double-pot curly tip frying machine 61. The discharge ports of the two rows of 6CCGQ-60 double-pot curly tip frying machines 61 are all aligned with the first discharge conveyor belt 65. The shaped and enzymatically hydrolyzed tea leaves are conveyed to the next process through the first discharge conveyor belt 65.

[0058] The pot body of the 6CCGQ-60 double-pot curly tip frying machine 61 is hemispherical in shape, the diameter of the pot mouth is 60 cm, and the depth of the pot body is 25 cm. It belongs to a large-diameter enzymatic tea frying pot, which is very suitable for the initial frying and shaping and enzymatic hydrolysis reactions of Songluo tea. The purpose of configuring large-diameter double-pot curly tip frying machines in the production line is to use the large arc shaping amplitude of the frying handboard and the fast frying frequency to fry into curly and loose spiral tea with a water content of 12-15%. At the same time, the "double-enzyme saccharification reaction" of cellulase and saccharifying enzyme is also used to make the initial Songluo tea with a sweet fragrance.

[0059] The shaping enzymolysis unit 7 includes 8 6CCGQ-50 double-pot koji stir-frying machines 71, which are arranged in two rows and opposite to each other. A second feeding carriage 72 is arranged above the 6CCGQ-50 double-pot koji stir-frying machines 71, and a second feeding conveyor belt 73 is arranged on the second feeding carriage 72. A fourth elevator 17 is arranged between the discharge end of the first discharge conveyor belt 65 and the feed end of the second feed conveyor belt 73. The second feeding carriage 72 is located below the discharge port of the second feed conveyor belt 73 and is provided with a second batching conveyor belt 74 that can rotate forward and backward. The two discharge ends of the second batching conveyor belt 74 are respectively located above the pot mouths of the 6CCGQ-50 double-pot koji stir-frying machines 71 on both sides, and the feeding of the 6CCGQ-50 double-pot koji stir-frying machines 71 on both sides is realized by the forward and reverse rotation of the second batching conveyor belt 74. A second discharging conveyor belt 75 is provided below the discharging port of the two rows of 6CCGQ-50 double-pot koji tea frying and drying machines 71, and the tea leaves after shaping and enzymolysis are transported to the next process through the second discharging conveyor belt 75.

[0060] The pot body of the 6CCGQ-50 double-pot Quhao stir-frying machine 71 is hemispherical in shape, with a pot mouth diameter of 50 cm and a pot body depth of 23 cm. It is a small-caliber enzymatic tea stir-frying pot. At the same time, the frying plate in the 6CCGQ-50 double-pot Quhao stir-frying machine 71 adopts a silicone rubber arc frying plate. The small arc frying amplitude of the soft silicone rubber arc frying hand board and the slow stir-frying frequency are utilized to stir-fry the whole thing into a tight, heavy and uniform spiral shape. At the same time, the enzymatic saccharification reaction continues to proceed to produce pine nea tea with a strong, high-sugar, sweet fragrance.

[0061] The discharging end of the second discharging conveyor belt 75 is provided with a fifth elevator 18, and the discharging end of the fifth elevator 18 is connected to the feeding end of the color sorting and impurity removal classifier 8, and the prepared pine nea tea is impurity removed and graded by the color sorting and impurity removal classifier 8. The color sorting and impurity removal classifier 8 preferably adopts a DT7C6 tea color sorter, which is divided into five grades of tea leaves: special grade, grade 1, grade 2, grade 3, and grade 4 through the three-level recognition and selection module of "shape selection + color selection + smart selection", and removes tea stems, tea leaves, sand and stones and other debris to complete the processing and production of pine nea tea for export, and finally sends the graded tea leaves to different storage bins for storage and standby.

[0062] In order to meet the demands of different countries for different grades and tastes of pine nea tea, the above-mentioned pine nea tea for export from different origins, seasons and grades is selected for aroma enhancement, sterilization, blending and homogenization to obtain pine nea tea suitable for the corresponding exporting countries.

[0063] The aroma enhancement, sterilization, blending and homogenizing process is completed by a blending and homogenizing machine 9. This machine is a special device for blending and homogenizing Songluo tea. The specific structure is described as follows:

[0064] The blending, leveling, and flavor-enhancing integrated machine 9 includes a blending and leveling conveyor device 91, a leveling and impurity-removing cylinder 92, a flavor-enhancing, sterilizing, and leveling drum 93, and a discharging and impurity-removing vibrating trough 94, which are connected in sequence.

[0065] Specifically, the blending and leveling conveyor device 91 includes a group of weighing and feeding belts 911. There are at least 3 weighing and feeding belts 911, which are of a stainless steel screen conveyor belt structure. The feeding end of the weighing and feeding belt 911 is provided with a tea storage hopper 916, and the discharging end of the weighing and feeding belt 911 is provided with a batching hopper 912. The spiral tea produced in different origins and seasons is conveyed into the batching hopper 912 through each weighing and feeding belt 911 for mixing. In order to accurately control the proportion of various teas to meet the needs of different customers, a weighing hopper 917 is connected and arranged below the tea storage hopper 916. An electromagnetic valve 918 for controlling the falling of tea is arranged between the tea storage hopper 916 and the weighing hopper 917. The bottom of the weighing hopper 917 is provided with an openable and closable weighing bottom plate 919. Specifically, the structure can adopt a rotating method to move the weighing bottom plate 919 out from below the weighing hopper 917. That is, a rotating shaft 9191 is arranged on the weighing hopper 917, and the rotating shaft 9191 is driven by a motor. The weighing bottom plate 919 is fixed to the rotating shaft 9191 through a connecting rod or the outer edge of the weighing bottom plate 919 is directly welded and fixed to the rotating shaft 9191. The rotation of the rotating shaft 9191 drives the weighing bottom plate 919 to rotate, so that the weighing bottom plate 919 enters or moves out from below the weighing hopper 917. To prevent tea from staying on the weighing bottom plate 919 when the weighing bottom plate 919 moves out, a circle of flexible rubber retaining rings 9171 is arranged at the bottom of the weighing hopper 917. To preliminarily mix the tea entering the batching hopper 912, a batching device 913 for mixing and stirring the tea is arranged in the batching hopper 912. The batching device 913 includes a batching rotating shaft 9131 and a group of batching blades 9132 installed on the batching rotating shaft 9131. The batching blades 9132 are of an inwardly concave arc surface structure and are distributed in a fan-shaped manner on the batching rotating shaft 9131. The batching rotating shaft 9131 is driven by a motor to drive the batching blades 9132 to rotate, so as to mix the tea conveyed from each weighing and feeding belt 911. The batching blades 9132 being of an inwardly concave arc surface structure and distributed in a fan-shaped manner can increase the intensity of blending and mixing.

[0066] Below the discharge end of the batching hopper 912, there is a material leveling conveyor belt 914. The mixed tea above falls onto the material leveling conveyor belt 914 through the discharge end of the batching hopper 912. The material leveling conveyor belt 914 is a downward-sloping screen conveyor belt made of stainless steel. To increase the material leveling force, a set of first turning devices 915 for turning over the tea are arranged on the conveyor belt at intervals of 60-70 cm. The first turning device 915 includes a first rotating shaft 9151 and a set of turning plates 9152 installed on the first rotating shaft 9151 at intervals and in a staggered manner. The turning plates 9152 are curved crescent-shaped. The two ends of the turning plates 9152 are fixed on the first rotating shaft 9151. A blanking gap 9153 is left between the turning plates 9152 and the first rotating shaft 9151, and the rotation directions of adjacent two first turning devices 915 are opposite. The first rotating shaft 9151 is driven by a motor to drive the turning plates 9152 to rotate, picking up the tea on the material leveling conveyor belt 914 and turning it over.

[0067] The discharge port of the material leveling conveyor belt 914 is docked with the feed port of the material leveling and impurity removal cylinder 92 through a Z-shaped conveyor belt 95. To make the tea fall evenly onto the Z-shaped conveyor belt 95, a first distributor 9110 in the shape of a fan structure is also arranged at the discharge port of the material leveling conveyor belt 914.

[0068] The material leveling and impurity removal cylinder 92 includes a cylindrical cylinder body 921. The cylinder body 921 is a cylindrical shape made of stainless steel, and the material leveling and impurity removal are carried out in a "vertical" manner. The height of the cylinder body 921 is 1.4 M, and the diameter is 1.1 M. A screen bottom cover 922 that can be opened and closed is arranged at the bottom of the cylinder body 921. The screen mesh number of the screen bottom cover 922 is 12 meshes, and a dust collection bag 927 is sleeved under the screen bottom cover 922. A screen top cover 923 that can be opened and closed is arranged at the top of the cylinder body 921. The screen mesh number of the screen top cover 923 is 914 meshes. A first negative ion fan 924 is arranged on the screen top cover 923, and a first sundry collection bag 925 is connected to the first negative ion fan 924. The opening and closing methods of the bottom cover 922 and the screen top cover 923 can adopt the same rotational opening method as the weighing bottom plate 919, which will not be described repeatedly here.

[0069] The cylinder 921 is also provided with a mixer 926, which includes a mixer shaft 9261 and a group of stirrers 9262 installed on the mixer shaft 9261. The screen upper cover 923 is opened to feed the tea leaves, so that the tea leaves on the mixer conveyor belt 914 fall into the cylinder 921, and then the screen upper cover 923 and the screen bottom cover 922 are closed. The mixer 9262 is driven by the motor to rotate the mixer shaft 9261 in the cylinder 921, and the tea leaves in the cylinder 921 are continuously stirred to make the mixing more uniform. At the same time, the hair and dust entrained in the spiral tea leaves are raised, and the hair and dust are absorbed into the first debris collection bag 925 by the first negative ion fan 924. At the same time, some heavier impurities fall into the dust bag 927 through the sieve holes of the screen bottom cover 922, and the mixing and impurity removal are completed.

[0070] The stirrer 9262 is a semicircular leaf-turning plate, on which a group of holes are arranged, and the diameter of the holes is 3-5 mm. There are three stirrers 9262 in total, each of which is installed on the material mixer shaft 9261 at an interval of 40 cm and staggered. The structure of the stirrer 9262 can reduce the resistance of the tea leaves during stirring, and the holes can allow small tea particles to pass directly without being squeezed and broken, thereby effectively reducing the breakage of the spiral tea during mixing.

[0071] The discharge port of the mixing and impurity removal cylinder 92 is located above the feed port of the aroma-enhancing, sterilizing and stacking drum 93. When the mixing and impurity removal cylinder 92 completes the mixing, the screen bottom cover 922 at the bottom is opened to allow the tea leaves to fall into the aroma-enhancing, sterilizing and stacking drum 93 below, and the tea leaves are re-dried and sterilized by the aroma-enhancing, sterilizing and stacking drum 93.

[0072] The aroma-enhancing, sterilizing and stacking roller 93 includes a roller body 931 and an electromagnetic heating device 932 arranged below the roller body 931. The roller body 931 is a cylindrical roller made of composite steel, which is aroma-enhancing and stacked in a "horizontal" manner. The size of the roller body is 1500×1100mm. In order to prevent the aroma-enhancing, sterilizing and stacking tea leaves from piling up at the discharge port of the roller body 931, three baffles 934 with a height of 15cm, a width of 0.3cm and an inclination of 17 degrees are arranged along the circumferential direction at a distance of 20cm from the discharge port. The structural principle of the baffles 934 is the same as that of the inlet and outlet guide vanes of the existing tea drum withering machine. When the roller body 931 rotates clockwise, the tea leaves are aroma-enhanced, sterilized and stacked. When the roller body 931 rotates counterclockwise, the tea leaves are discharged under the guidance of the baffles 934.

[0073] The drum body 931 is rotatably mounted on the electromagnetic heating tank 9321. A material leveling device 933 that rotates in the opposite direction to the rotation direction of the drum body 931 is arranged inside the drum body 931. When the drum body 931 rotates forward to enhance the fragrance, the material leveling device 933 rotates in reverse to turn the tea leaves in the opposite direction so that the tea leaves can fully receive the electromagnetic radiation heat for fragrance enhancement and sterilization. When the drum body 931 rotates in reverse for discharging, the material leveling device 933 rotates forward to push the tea leaves out of the discharge port. The material leveling device 933 includes a rotating shaft 9331 arranged inside the drum body 931, and a group of material leveling blades 9332 spaced and staggeredly installed on the rotating shaft 9331. The axial length of the rotating shaft 9331 is 1.2 m and the diameter is 0.3 cm. The material leveling blades 9332 are in the shape of crescent flat plates, which can improve the work efficiency of material leveling and reduce the breakage of Songluo tea. The material leveling device 933 fully stirs the tea leaves inside the drum body 931 to make the tea leaves evenly heated and improve the efficiency of drying and fragrance enhancement. At the same time, a one-third gap is left between the material leveling blades 9332 and the inner wall of the drum body 931 to prevent the tea leaves from being crushed by extrusion.

[0074] The electromagnetic heating device 932 includes an electromagnetic heating tank 9321, and an electromagnetic heating disk 9322 is arranged inside the electromagnetic heating tank 9321. There are 3 electromagnetic heating disks 9322 in total, spaced 45 cm apart, and arranged inside the electromagnetic heating tank 9321. Through electromagnetic radiation heat for heating, it promotes the volatilization of aromatic substances in the tea leaves to improve the aroma of Songluo tea, and at the same time can also kill microbial contaminants. In order to maintain uniform radiation heating and avoid direct electromagnetic radiation from burning the tea leaves, a partition 9323 is arranged between the electromagnetic heating tank 9321 and the drum body 931. The partition 9323 is made of quartz material and is evenly distributed with laser micropores to balance the temperature and relieve electromagnetic radiation.

[0075] In order to monitor the temperature and humidity of the tea leaves inside the drum body 931 and facilitate the adjustment of the temperature of the electromagnetic heating disk 9322, a temperature and humidity sensor 936 is also arranged at the discharge end of the drum body 931. The temperature and humidity sensor 936 is a MIK-TH800 type temperature and humidity sensor. Its multiple induction probes are arranged at a position 20 - 30 cm away from the discharge port of the drum body 931 and are connected to the controller to timely control the temperature and humidity of fragrance enhancement, sterilization, and material leveling, ensuring that the water content of the Songluo tea is ≤ 5.5% when it is discharged.

[0076] The discharge port of the Titian sterilization and blending drum 993 is connected to the discharge and impurity removal vibrating trough 94. A second distributor 935 in the shape of a fan structure is also provided at the discharge port of the drum body 931, so that the tea leaves are evenly scattered on the feeding end of the discharge and impurity removal vibrating trough 94 through the second distributor 935. The discharge and impurity removal vibrating trough 94 includes a trough body 941 and a vibrator 942 that drives the trough body 941 to vibrate. The trough body 941 is arranged at a downward slope of 10-12 degrees, and the material is discharged smoothly from high to low. The trough body 941 is made of stainless steel, with a length of 2.4M, a width of 0.8M, and a depth of 0.6M. The bottom plate of the trough body 941 is a 12-mesh screen structure. The vibrator 942 is a JMC-30 type ratchet pneumatic vibrator, which is arranged 15-20 cm behind the trough body 941 to generate vibrations with a frequency of 500-600 times / min, and to push the trough body 941 to discharge materials and screen out broken tea powder.

[0077] In order to ensure the even mixing, impurity removal and transportation of the tea leaves after Titian sterilization, and to clean up the broken tea produced during the processing, a group of second turning devices 943 are arranged at intervals in the trough body 941. Preferably, the second turning device 943 includes a stirring dragon 9431 rotatably installed on the trough body 941 and a group of turning claws 9432 arranged on the stirring dragon 9431. The stirring dragon 9431 is made of stainless steel, with a length of 2.1M and a diameter of 25 cm, and is driven by a motor to rotate. Due to its large diameter, the stirring dragon 9431 has a higher stirring force. The stirring dragon 9431 is arranged along the feeding direction of the discharge and impurity removal vibrating trough 94, and the turning claws 9432 are installed at intervals and staggered on the stirring dragon 9431. The turning claws 9432 are in the shape of five fingers, and this structure can reduce the damage to the tea leaves during turning. The stirring dragon 9431 drives the turning claws 9432 to fully turn and evenly blend the tea leaves on the trough body 941. At the same time, the broken tea foam entrained in it falls from the bottom plate screen of the trough body 941.

[0078] Further, the discharging and impurity-removing vibrating trough 94 includes an outer cover 944 covering the trough body 941. The outer cover 944 is made of a 100-mesh stainless steel screen. A second negative ion fan 945 is arranged on the outer cover 943, and a second sundry collecting bag 946 is connected to the second negative ion fan 945. The negative ion wind generated by the high-speed rotation of the second negative ion fan 945 is used to remove the fuzz, dust, foreign matters and static electricity adhering to the tea leaves, and at the same time, it also sucks the hot and warm tea leaves for cooling. This machine is equipped with a discharging and impurity-removing vibrating trough, which can not only efficiently remove the fuzz, dust and static electricity adhering to the tea leaves, making the cleanliness reach more than 98%, but also suck the hot and warm tea leaves for cooling to achieve the "cold packaging" of Songluo tea and prevent the quality from being affected by high-temperature oxidation. To further reduce the breakage rate during blending and even piling, the semi-circular turning leaves on the stirrer, the even piling blades on the even piling machine and the turning claws on the second feeding device are all covered with a layer of plastic soft sleeve, which can not only efficiently stir and blend evenly, but also reduce the breakage of Songluo tea.

[0079] The discharging end of the discharging and impurity-removing vibrating trough 94 is directly connected to a tea packing machine. The second negative ion fan on the discharging and impurity-removing vibrating trough 94 also sucks the hot and warm tea leaves for cooling to achieve the "cold packaging" of Songluo tea and prevent the tea quality from being affected by high-temperature oxidation.

[0080] Example 2: A processing method for export Songluo tea includes the following steps:

[0081] 1) Fresh leaf picking: Pick the fresh leaves of the Songluo tea variety, one bud with 1 - 4 leaves and the opposite-leaf tea shoots.

[0082] 2) Quick shaking: Input the picked fresh leaves into the tea shaking machine 1 for quick and short-time shaking. Set the rotation speed of the shaking machine drum to 35 - 38 revolutions per minute and the time to 3 - 5 minutes. Utilize the convex rib structure specially provided on the inner wall of the stainless steel shaking cage of this machine to accelerate the edge friction of the bud leaves, damage the leaf margin cells, facilitate the entry of exogenous cellulose into the inner layer of the bud leaves for photothermal withering enzymatic hydrolysis reaction, and at the same time, slowly oxidize naturally under the action of polyphenol oxidase, initially forming a red edge and eliminating the grassy smell to form a sweet floral fragrance.

[0083] 3) Photothermal withering enzymatic hydrolysis: Send the shaken tea leaves into the withering unit 2 for photothermal withering enzymatic hydrolysis, and add cellulase and mix evenly during photothermal withering enzymatic hydrolysis. Set the temperature of hot air withering to 40 - 45 °C, the air volume to 3 - 4 cubic meters per second, and the photothermal withering time to 3 - 4 hours. The cellulase is added in an amount of 0.3 - 0.5% by weight of the tea leaves. The cellulase is formulated into a solution with a concentration of 80 - 85% and sprayed into the bud leaves and mixed evenly through an ultrasonic enzyme adding device.

[0084] Through photothermal withering and enzymatic hydrolysis, the water loss rate of the bud and leaf is between 25% - 30%, and the oxidation and redness rate of the tea stalk reaches 10% - 15%. At the same time, by using the catalytic action of externally added cellulase in enzymatic hydrolysis, it promotes the decomposition and conversion of cellulose in tea leaves into tea polysaccharides, adding a sweet and refreshing taste, and at the same time promoting the softening of leaf texture to facilitate the formation of spiral shape. The cellulase is a product of Shanghai Yuanye Bio-Technology Co., Ltd. This product is a food-grade light yellow or yellowish-brown powder, easily soluble in water. Its relative molecular weight is 58.7KD. The working temperature range is 40 - 60°C, and the optimal enzymatic hydrolysis temperature is 50°C. The working pH value range is 4.0 - 5.5, and the optimal enzymatic hydrolysis pH value is 4.8. This enzyme is a complex enzyme, mainly composed of exo-β-glucanase, endo-β-glucanase, β-glucosidase, xylanase, etc. It can act on cellulose and its derivatives, and can enzymatically hydrolyze insoluble cellulose in tea leaves into tea polysaccharide compounds.

[0085] 4) Fixing: Input the bud and leaf after photothermal withering and enzymatic hydrolysis into the fixing machine 3 for fixing. Set the electrothermal temperature of the fixing machine 3 to 90 - 95°C, the hot air temperature to 75 - 80°C, the rotation speed of the fixing drum to 36 - 38 r / min, and the fixing time to 3 - 5 min. Use the "dual heat" of electrothermal and hot air for short-time medium-temperature fixing. The benefits of using short-time medium-temperature fixing: inhibit the activity of polyphenol oxidase, prevent the redness reaction, to form the quality and flavor of green tea, and at the same time still retain the cellulase activity, enabling it to continue the enzymatic hydrolysis reaction to form more tea polysaccharide compounds. The discharge end of the electrothermal and hot air integrated fixing machine is provided with a spreading conveyor belt, and 2 cold air blowers are configured on the spreading conveyor belt, which can quickly reduce the temperature of the fixed leaves to 55 - 60°C, which is more conducive to the subsequent enzyme-added rolling and enzymatic hydrolysis reaction.

[0086] 5) Enzyme-added rolling: Add 1.2 - 1.6% by weight of complex saccharifying enzyme to the bud and leaf after fixing and cooling, mix well, and then send it into the rolling unit 4 for rolling. Set the rolling time to 35 - 40 min, including 15 min of light rolling, 15 - 20 min of heavy rolling under 1 / 4 pressure, and 5 min of non-pressure and loose rolling. The benefits of using enzyme-added rolling: Through the rolling action, it promotes the integration of the complex saccharifying enzyme solution into the bud and leaf, facilitating the rolling of the bud and leaf into strips, and at the same time also carrying out the preliminary enzymatic hydrolysis reaction of the saccharifying enzyme. The complex saccharifying enzyme is a product of Shanghai Yuanye Bio-Technology Co., Ltd., which is a food-grade brown liquid. Its saccharifying enzyme activity is 900 HGAU / ml. The enzymatic hydrolysis temperature is 58 - 65°C, and the enzymatic hydrolysis pH value is 4.0 - 4.5. The characteristic of this enzyme is that it can reduce the reverse reaction, shorten the saccharification time, and can quickly hydrolyze and liquefy the α-D-1,4 glycosidic bond and α-D-1,6 glycosidic bond in tea starch, thereby converting to produce tea polysaccharides, adding a sweet and refreshing taste and high-sugar sweet fragrance.

[0087] 6) Enzymatic deblocking: Input the enzyme-kneaded buds and leaves into the deblocking machine 5 for enzymatic deblocking. The deblocking machine 5 is an electromagnetic drum deblocking machine. Set the electromagnetic temperature to 60 - 65°C, the enzymatic hydrolysis time to 30 - 40 min, and the drum rotation speed to 32 - 34 revolutions per minute. Benefits of dynamic deblocking and enzymatic hydrolysis: By using the rotation of the drum, it prompts the kneaded leaf mass to be scattered along the spiral guide ribs and under the action of electromagnetic radiation heat, not only to break up the bonded mass and volatilize water, but also to promote the comprehensive enzymatic hydrolysis reaction of cellulase and complex saccharifying enzyme in a suitable thermal environment.

[0088] 7) Primary shaping: Input the enzyme-deblocked buds and leaves into the stir-frying and enzymatic hydrolysis unit 6 for primary shaping. Set the electrothermal temperature of the first double-pot curly tip drying machine to 55 - 65°C, the time to 90 - 100 min, the swing speed of the stirrer to 80 - 82 r.p.m, and the amplitude of the stir-frying to be between 72 - 76°. Benefits of using the large-diameter first double-pot curly tip drying machine for primary shaping of spiral shape: After deblocking, the buds and leaves, in the large-diameter stir-frying pot and a suitable enzymatic hydrolysis temperature environment, through the large-amplitude stir-frying of the stirrer and a fast stir-frying frequency, make full use of the function of cellulase to soften the leaf texture, and stir-fry them into a curly and loose spiral shape. At the same time, it also utilizes the "double-enzyme saccharification reaction" of cellulase and saccharifying enzyme to hydrolyze the insoluble cellulose and starch in tea and convert them into tea polysaccharides. Moreover, it also dries the water to make the primary processed Songluo tea with a water content of 12 - 15% and a sweet fragrance.

[0089] 8) Drying and shaping: Input the primary-shaped buds and leaves into the shaping and enzymatic hydrolysis unit 7 for enzymatic hydrolysis, drying, and shaping to make Songluo tea with a water content ≤ 5.5%. Set the electrothermal temperature of the second double-pot curly tip drying machine to 80 - 90°C, the time to 100 - 115 min, the swing speed of the stirrer to 50 - 55 r.p.m, and the amplitude of the stir-frying to be between 55 - 65°. Benefits of using the small-diameter second double-pot curly tip drying machine for drying and shaping: Let the curly and loose spiral tea, in the small-diameter stir-frying pot, through a small-amplitude stir-frying and a slow stir-frying frequency, conduct medium-temperature and long-time drying and shaping. By using the soft and curved stirrer made of silicone rubber, which swings back and forth in the hemispherical stir-frying pot, through the combined action of the soft pushing force of the stirrer, the self-gravity of the tea, and the extrusion force of the pot body, make the spiral tea tight, heavy, and uniform. At the same time, it also continues to promote the enzymatic hydrolysis and saccharification reaction to convert it into a large amount of tea polysaccharide compounds and make the high-sugar and sweet-fragranced Songluo tea.

[0090] Step 9) Color sorting, impurity removal and grading: Feed the stir-fried, shaped tea leaves into the color sorting, impurity removal and grading machine 8 for color sorting, impurity removal and grading; utilize the unique seven-layer color sorting intelligent grading layer, and through the feeding system, sorting system, electronic control system, operating system, optoelectronic system and the three-level recognition and selection module of "shape selection + color selection + intelligent selection", classify the new type of Songluo tea into five grades of export tea, namely special grade, grade 1, grade 2, grade 3 and grade 4, and remove impurities such as tea stalks, flakes, sand and stones to ensure quality and safety.

[0091] Step 10) Aroma enhancing, sterilization, blending and uniform stacking: According to the needs of customers, feed the Songluo tea selected from different origins, different seasons and different grades into the blending, uniform stacking, aroma enhancing and sterilization integrated machine 9 for aroma enhancing, sterilization, blending and uniform stacking.

[0092] Set the blending and impurity removal tank, with the amount of each batch of ingredients being 100 - 150 KG, the rotation speed of the blender being 12 - 15 revolutions per minute, the air volume of the first negative ion fan being 15 - 20 cubic meters per minute, and the blending and impurity removal time being 4 - 5 minutes; the forward rotation speed of the aroma enhancing, sterilization and uniform stacking drum being 8 - 10 revolutions per minute, the reverse rotation speed of the uniform stacker being 10 - 13 revolutions per minute, the aroma enhancing and sterilization temperature being 100 - 105 °C, and the aroma enhancing, sterilization and uniform stacking time being 5 - 6 minutes; the vibration frequency of the discharging and impurity removal vibrating trough being 500 - 530 times per minute, and the air volume of the second negative ion fan being 50 - 60 cubic meters per minute, so that the water content ≤ 5.5% and the cleanliness reaches over 98%.

[0093] The present invention has been described exemplarily in combination with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention; or without improvement, the above concept and technical solution of the present invention are directly applied to other occasions, they are all within the protection scope of the present invention.

Claims

1. A continuous production line for export Usnea tea, characterized in that: It includes a withering machine (1), a withering unit (2), a fixation machine (3), a rolling unit (4), a lump-breaking machine (5), a shaping and enzymolysis unit (6), a shaping and enzymolysis unit (7), a color sorting, impurity removing and grading machine (8) and a blending, leveling and fragrance enhancing integrated machine (9) which are sequentially connected by a conveying device; The withering unit (2) includes a group of tea impurity removing and withering integrated machines (21) arranged side by side. The tea impurity removing and withering integrated machine (21) includes a withering trough (211). A rotary conveyor belt (212) for transporting tea is arranged at the bottom of the withering trough (211). An inlet conveyor belt (213) for conveying tea into the withering trough (211) is also arranged at the feeding end of the withering trough (211). A group of negative ion fans (214) are arranged at intervals above the inlet conveyor belt (213). A sundry collection bag (215) is connected to the negative ion fans (214) through pipes. An electromagnetic roller (216) is also arranged below the air inlet of the negative ion fans (214); The blending, leveling and fragrance enhancing integrated machine (9) includes a blending and leveling conveying device (91), a leveling and impurity removing cylinder (92), a fragrance enhancing, sterilizing and leveling drum (93) and an outlet impurity removing vibrating trough (94) which are sequentially connected; The blending and leveling conveying device (91) includes a group of weighing inlet belts (911). A batching hopper (912) is arranged at the discharging end of the weighing inlet belt (911). A batching device (913) for mixing and stirring tea is arranged in the batching hopper (912). A leveling conveyor belt (914) is connected to the discharging end of the batching hopper (912). A group of first turning devices (915) for turning over tea are arranged at intervals on the leveling conveyor belt (914). The discharging outlet of the leveling conveyor belt (914) is butted against the inlet of the leveling and impurity removing cylinder (92); The leveling and impurity removing cylinder (92) includes a cylindrical cylinder body (921), a screen bottom cover (922) and a screen upper cover (923) which are respectively arranged at the bottom and top of the cylinder body (921) and can be opened and closed. A first negative ion fan (924) is arranged on the screen upper cover (923). A first sundry collection bag (925) is connected to the first negative ion fan (924). A leveling device one (926) is also arranged in the cylinder body (921). The discharging outlet of the leveling and impurity removing cylinder (92) is butted against the inlet of the fragrance enhancing, sterilizing and leveling drum (93); The fragrance enhancing, sterilizing and leveling drum (93) includes a drum body (931) and an electromagnetic heating device (932) arranged below the drum body (931). The discharging outlet of the fragrance enhancing, sterilizing and leveling drum (93) is butted against the outlet impurity removing vibrating trough (94). The outlet impurity removing vibrating trough (94) includes a trough body (941) and a vibrator (942) for driving the trough body (941) to vibrate. The bottom plate of the trough body (941) is of a 12-mesh screen structure; The withering machine (1) is a DL-6CZQ-110 type tea withering machine; the fixing machine (3) is a 6CST-80-ZF type electric and hot air tea fixing machine; the lump-breaking machine (5) is an electromagnetic roller lump-breaking machine, including an electromagnetic roller body (51) and spiral guide vanes (52) arranged inside the electromagnetic roller body (51); the color sorting, impurity removing and grading machine (8) is a DT7C6 type tea color sorter; The shaping and enzymolysis unit (6) includes a group of 6CCGQ-60 type double-pot curly tip frying and drying machines (61). The diameter of the pot mouth of the 6CCGQ-60 type double-pot curly tip frying and drying machine (61) is 60 cm, and the depth of the pot is 25 cm. The 6CCGQ-60 type double-pot curly tip frying and drying machines (61) are arranged in two rows and opposite to each other. Above the 6CCGQ-60 type double-pot curly tip frying and drying machines (61), there is a first feeding traveling crane (62). On the first feeding traveling crane (62), there is a first feeding conveyor belt (63). Below the discharge port of the first feeding conveyor belt (63), the first feeding traveling crane (62) is provided with a first batching conveyor belt (64) that can rotate forward and backward. Below the discharge ports of the two rows of 6CCGQ-60 type double-pot curly tip frying and drying machines (61), there is a first discharge conveyor belt (65); The shaping and enzymolysis unit (7) includes a group of 6CCGQ-50 type double-pot curly tip frying and drying machines (71). The diameter of the pot mouth of the 6CCGQ-50 type double-pot curly tip frying and drying machine (71) is 50 cm, and the depth of the pot is 23 cm. The 6CCGQ-50 type double-pot curly tip frying and drying machines (71) are arranged in two rows and opposite to each other. Above the 6CCGQ-50 type double-pot curly tip frying and drying machines (71), there is a second feeding traveling crane (72). On the second feeding traveling crane (72), there is a second feeding conveyor belt (73). Below the discharge port of the second feeding conveyor belt (73), the second feeding traveling crane (72) is provided with a second batching conveyor belt (74) that can rotate forward and backward. Below the discharge ports of the two rows of 6CCGQ-50 type double-pot curly tip frying and drying machines (71), there is a second discharge conveyor belt (75).

2. The continuous production line for exported Usnea diffracta Vain tea according to claim 1, characterized in that: Below the discharge port of the fixing machine (3), there is a spreading conveyor belt (31), and a cold air blower (32) is arranged on the spreading conveyor belt (31).

3. The continuous production line for exported Usnea diffracta Vain tea according to claim 2, characterized in that: The rolling unit (4) includes a rolling frame (41), a group of rolling machines (42) arranged side by side on the rolling frame (41). On the rolling frame (41), there is a batching traveling crane (43). On the batching traveling crane (43), there is a batching conveyor belt (44). Below the discharge end of the batching conveyor belt (44), there is a blanking cylinder (45). Inside the blanking cylinder (45), there is a distributor (46). Below the blanking cylinder (45), there is a flexible skirt (451) extending into the rolling barrel of the rolling machine (42). Below the tea outlet of the rolling machine (42), there is a vibrating output trough (14). The vibrating output trough (14) is arranged at a downward inclination of 5-7°. At the discharge end of the vibrating output trough (14), there is a comb-shaped filter (141).

4. The continuous production line of exported Usnea diffracta Vain. tea according to claim 3, wherein: A kneading feed conveyor belt (47) is arranged between the spreading conveyor belt (31) and the batching conveyor belt (44), and a compound glucoamylase adding device (48) and a material turning roller (49) are arranged on the kneading feed conveyor belt (47).

5. The continuous production line for export Usnea tea according to claim 1, characterized in that: A material leveling hopper (218) is further arranged above the feeding end of the withering trough (211). The bottom of the material leveling hopper (218) is a flat discharge port adapted to the width of the rotary conveyor belt (212). An ultrasonic enzyme adding device (219) is arranged above the material leveling hopper (218). The atomizing nozzle of the ultrasonic enzyme adding device (219) is aligned with the inside of the material leveling hopper (218). A material leveling device II (2110) is further arranged inside the material leveling hopper (218). The material leveling device II (2110) includes a material leveling rotating shaft (21101) and a group of material leveling claws (21102) misaligned and installed on the material leveling rotating shaft (21101).

6. The continuous production line for exported Usnea diffracta Vain tea according to claim 1, characterized in that: An outer cover (943) is further arranged on the tank body (941), a second negative ion fan (944) is arranged on the outer cover (943), and a second sundry collection bag (945) is connected to the second negative ion fan (944).

7. The continuous production line for export Usnea tea as claimed in claim 1, characterized in that: A vibrating batching trough (10) is arranged below the discharge port of the shaking machine (1). The vibrating batching trough (10) is arranged to slope downward at 7-9°. A group of blanking holes (101) corresponding to the tea leaf impurity removing and withering integrated machine (21) one by one are arranged at the bottom of the vibrating batching trough (10), and the blanking holes (101) are located above the feeding end of the feeding conveyor belt (213). A blanking valve (102) is arranged in the blanking holes (101); A partition plate (103) that can move up and down is arranged between two adjacent blanking holes (101) of the vibrating batching trough (10).

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