An intelligent production line for tea purification and sterilization

Abstract

The present invention discloses an intelligent production line for tea purification and sterilization, including an electromagnetic aroma machine, a vibration sieve shaking machine, a vibration air separator, an intelligent metal identification and removal machine, an electrostatic impurity remover, a photoelectric color selection and stalk sorting machine, a microwave light wave sterilizer, and a nitrogen filling machine for tea canning, which are sequentially connected through a conveying device; and also includes a conveying line for conveying tea cans, on which an ion wind washing device and a first ultraviolet sterilizer for sterilizing empty tea cans located in front of the nitrogen filling machine are arranged on the conveying line of the tea cans, and a second ultraviolet sterilizer and an intelligent packaging machine are sequentially connected after the nitrogen filling machine. The present invention can effectively remove impurities and pathogens in tea, thereby improving the taste and shelf life of tea, and can be widely used in the field of tea processing.

Description

Technical Field

[0001] The invention relates to the field of tea processing, and in particular to an intelligent production line for tea purification and sterilization. Background Art

[0002] Tea is a healthy drink that is loved by Chinese people. However, in recent years, there have been incidents of harmful impurities and excessive aflatoxin in tea, which have affected human health and have seriously affected the health of consumers.

[0003] The harmful impurities in tea leaves are very complex and their sources are also very wide. For example, when fresh leaves are picked, they carry impurities such as insect eggs and weeds. During tea processing, they are more likely to be mixed with impurities such as iron filings, sawdust, and hair. When stored, they may also be infected with pathogens due to storage sites or moisture. In addition, during manual operation, operators will also bring in impurities and pathogens, and there are many types of pathogens, such as aflatoxin, staphylococcus, salmonella, shigella, streptococcus and other toxins. If these impurities exist in tea leaves, on the one hand, these impurities themselves are harmful, and if they are mistakenly taken into the mouth by consumers, they are likely to cause harm to them; on the other hand, these impurities will affect the color, aroma, taste, shape, freshness, etc. of the tea leaves. Furthermore, the pathogens not only affect the quality and taste of the tea leaves, but also bring potential harm to the drinkers. In the current tea processing, the tea leaves are directly packaged after drying or packaged and packaged after simple air selection to remove some impurities. There is no systematic impurity removal and sterilization step for the finished tea leaves. Therefore, the quality of the tea leaves produced and processed is uneven, and the quality of the tea leaves is difficult to guarantee.

[0004] Therefore, how to effectively remove impurities in tea leaves and ensure that harmful bacteria in tea leaves do not exceed the standard, so as to ensure the drinking quality and safety of tea products is a technical problem that urgently needs to be solved in this field. Summary of the invention

[0005] The purpose of the present invention is to provide an intelligent production line for tea purification and sterilization, so as to solve the problem that the current tea processing system cannot remove harmful impurities and pathogenic toxins in tea.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an intelligent production line for tea purification and sterilization, including an electromagnetic aroma machine, a vibration screening machine, a vibration air separator, an intelligent metal identification and removal machine, an electrostatic impurity remover, a photoelectric color sorting and stem sorting machine, a microwave light wave sterilizer and a nitrogen filling machine for tea canning, which are connected in sequence through a conveying device for conveying tea; it also includes a conveying line for conveying tea cans, on which an ion wind blowing device and a first ultraviolet sterilizer for sterilizing empty tea cans located in front of the nitrogen filling machine are arranged on the conveying line for the tea cans, and a second ultraviolet sterilizer and an intelligent packaging machine are connected in sequence after the nitrogen filling machine.

[0007] In order to facilitate the inspection and preservation of tea leaves that have not been packaged, a fresh-keeping tank for temporarily storing tea leaves is arranged behind the microwave light wave sterilizer, and the discharge port of the fresh-keeping tank is connected to the nitrogen filling machine.

[0008] The electromagnetic aroma machine is a mesh electromagnetic drying machine, which can intelligently set different electromagnetic radiation heat energy temperatures to penetrate deep into the tea leaves to dry out moisture and kill harmful organisms, while also promoting the volatilization of aromatic substances in the tea leaves to enhance the aroma.

[0009] The vibrating sieve shaker is equipped with a 10-12 mesh stainless steel sieve, which automatically sieves out broken tea leaves and fine dust through vibration.

[0010] The vibrating air separator has the characteristics of automatic air volume control and stable air volume, etc. The air volume of different gears can be set according to different types of tea leaves to blow away the stipules and yellow leaves entrained in the tea leaves.

[0011] The intelligent metal identification and removal machine is a high-voltage electromagnetic adsorption metal impurity removal machine. The machine is equipped with a high-voltage electromagnetic intelligent identification system, which absorbs and removes iron, copper, aluminum, metal rust and other impurities carried in tea leaves through the magnetization identification function of the high-voltage electromagnetic drum.

[0012] The electrostatic impurity remover is an electrostatic organic impurity separator. Because it uses 18 electrostatic rollers and a secondary dust removal device, it has the characteristics of strong electrostatic magnetic field, strong ability to separate organic matter, and easy cleaning and recycling of waste. The machine can separate and remove organic impurities such as hair, feathers, scales, and insect bodies entrained in tea leaves, making it difficult for pathogens to breed and reproduce in tea leaves.

[0013] The photoelectric color sorting and stalk picking machine is an intelligent photoelectric color sorting and impurity removal machine. The machine utilizes the "multi-dimensional space algorithm", Hawkeye recognition technology, and inGaAs recognition technology of the recognition system to identify and remove tea stalks, sack fragments, wood chips, plant flower and grass leaves, stem bark, paper pieces, plastic pieces, fibers and other debris.

[0014] The ultraviolet sterilizer is a UV sterilizer. Its structural features are a focusing design, a UV lamp is installed horizontally in the inner cavity, and an overvoltage and overcurrent protection device is provided to sterilize the inside and outside of the tea can with high-pressure ultraviolet light.

[0015] The microwave light wave sterilizer is a microwave and light wave combined sterilizer. The machine uses microwaves with a frequency of 300 MHz to 3000 MHz electromagnetic waves for heating and sterilization. In addition, the upper part of the machine is also equipped with light waves and a light wave reflector with a concave reflecting mirror, so as to perform comprehensive sterilization with the dual effects of microwaves and strong light waves.

[0016] The nitrogen filling machine injects nitrogen into the can to remove oxygen, so as to inhibit the oxidation of tea polyphenols, tea pigments, theanine and aromatic substances, so as to maintain good freshness in color, aroma, taste and shape. The nitrogen filling machine comprises a conveying chain at the bottom, a tea can mounting seat arranged on the conveying chain, a group of tea can placement holes are arranged on the tea can mounting seat, a cover is arranged on the conveying chain, a nitrogen inlet pipe and a tea feed pipe are arranged on the cover, the tea feed pipe is connected to the discharge port of the microwave light wave sterilizer or the fresh-keeping can, and the nitrogen inlet pipe is connected to a nitrogen gas source.

[0017] In order to facilitate the combination with the tea can to hold tea leaves, a retractable tea discharge joint is arranged at the end of the tea feeding pipe.

[0018] In order to conveniently control the amount of tea leaves fed each time, the tea leaf feeding pipe is provided with a first stop valve and a second stop valve.

[0019] In order to minimize the overflow of nitrogen, movable baffles and driving cylinders for driving the movable baffles to move up and down are arranged at both ends of the cover.

[0020] Furthermore, the ion wind blowing device includes a group of high-pressure air nozzles, and the high-pressure air nozzles are arranged on both sides of the conveying line and below the tea can.

[0021] The intelligent packaging machine is an integrated intelligent packaging machine for boxing, bagging, plastic sealing and packing. The biggest advantage of this machine is that it uses an "intelligent manipulator" to put tea cans into boxes and pack them into boxes with high-temperature plastic packaging for storage. This can avoid bringing microorganisms into the packaging box, causing secondary pollution and affecting the quality of tea products.

[0022] Beneficial effects of the present invention: The present invention connects various devices through a conveying device to transport tea leaves and tea cans, and realizes automatic canning of tea leaves in a nitrogen-filled filling machine, and finally automatically packs the tea leaves through an intelligent packaging machine. During the entire production process, operators do not need to directly contact tea leaves and tea cans, thereby effectively avoiding secondary contamination of tea leaves caused by human operation. The system removes impurities from tea leaves and sterilizes them through a series of sterilization and impurity removal equipment, sterilizes tea cans at the same time, and cans and seals tea leaves in a nitrogen-filled environment. Nitrogen can effectively inhibit the oxidation of tea polyphenols, tea pigments, theanine, and aromatic substances, so that their color, aroma, taste, and shape remain fresh and refreshing. Therefore, the tea leaves processed by this production line have the advantages of high cleanliness, a pure tea rate of more than 99.8%, and good tea preservation effects.

[0023] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the connection of the production line equipment of the present invention.

[0025] Figure 2 It is a partial schematic diagram of the conveying line in the present invention.

[0026] Figure 3 It is a cross-sectional view of the nitrogen filling machine in the present invention. DETAILED DESCRIPTION

[0027] Examples, such as Figures 1 to 3 As shown, an intelligent production line for tea purification and sterilization includes an electromagnetic aroma machine 1, a vibration sieve machine 2, a vibration air separator 3, an intelligent metal identification and removal machine 4, an electrostatic impurity remover 5, a photoelectric color selection and stem sorting machine 6, a microwave light wave sterilizer 7 and a nitrogen filling machine 8 for tea canning, which are connected in sequence through a conveying device; it also includes a conveying line 9 for conveying tea cans, on which an ion wind washing device 10 and a first ultraviolet sterilizer 11 for sterilizing empty tea cans located in front of the nitrogen filling machine 8 are provided, and a second ultraviolet sterilizer 12 and an intelligent packaging machine 13 are connected in sequence after the nitrogen filling machine 8. In this production line, except for the nitrogen filling machine 8 and the ion wind washing device 10, which are newly designed, all other equipment are purchased equipment.

[0028] The preferred electromagnetic aroma machine 1 is a 6CHCDL-25 mesh electromagnetic drying machine, which uses the heat energy of electromagnetic radiation to penetrate into the tea leaves to dry moisture and kill harmful organisms. The use parameters are: the temperature of Maofeng tea sterilization aroma is 100-102°C, the time is 5-6 minutes, and the moisture content of the tea leaves is ≤4.5%. The temperature of Yunnan black tea sterilization aroma is 104-106°C, the time is 5-6 minutes, and the moisture content of the tea leaves is ≤4.5%. The temperature of Pu'er tea sterilization aroma is 106-108°C, the time is 6-7 minutes, and the moisture content of the tea leaves is ≤6.5%.

[0029] The preferred vibration sieve shaker 2 is a 6CDS-82 vibration sieve shaker, which automatically sieves out broken tea powder through a configured stainless steel screen by reciprocating vibration. The parameters for the stainless steel screen are: 12 mesh stainless steel screen for Maofeng tea and Dianhong tea, and 10 mesh stainless steel screen for Pu'er tea.

[0030] The preferred vibration air separator 3 is the FX-60-2 electromagnetic vibration tea air separator. The machine is a two-stage air separator design with the characteristics of controllable and stable air volume. The air volume parameters are: 0.4-0.5 cubic meters per minute for Maofeng tea and Dianhong tea, and 0.5-0.6 cubic meters per minute for Pu'er tea.

[0031] The preferred intelligent identification metal removal machine 4 is a (Japanese imported) high-voltage electromagnetic adsorption metal impurity removal machine. The machine is equipped with a high-voltage electromagnetic intelligent identification system, which can adsorb and remove iron, copper, aluminum, metal rust and other impurities carried in tea leaves through the magnetization identification function of the high-voltage electromagnetic drum.

[0032] The preferred electrostatic impurity remover 5 is an XDJF-X-720 electrostatic organic impurity separator, which uses 18 electrostatic rollers and a secondary dust removal device, so it can separate and remove organic impurities such as hair, feathers, scales, and insect bodies entrained in the tea leaves.

[0033] The preferred photoelectric color sorting and stem picking machine 6 is the TW6R intelligent photoelectric color sorting machine, which uses the picking function of the identification system to identify and remove tea stems, sack fragments, wood chips, plant flowers and leaves, stem bark, paper, plastic sheets, fibers and other debris.

[0034] The preferred first ultraviolet sterilizer 11 and the second ultraviolet sterilizer 12 are both UV sterilizers, which are respectively installed on the conveyor belts before and after the nitrogen filling machine 8, and use ultraviolet light to irradiate and sterilize empty tea cans and packaged tea cans respectively.

[0035] The preferred microwave light wave sterilizer 7 is a YV-3 type microwave and light wave sterilizer. The machine uses electromagnetic waves and high-intensity light waves for comprehensive sterilization. The sterilization temperature and time parameters are: Maofeng tea is sterilized at 102-104°C for 3-3.5 minutes. Dianhong tea is sterilized at 104-106°C for 3-3.5 minutes. Pu'er tea is sterilized at a high temperature of 107-108°C for 3.5-4 minutes.

[0036] The preferred intelligent packaging machine 13 is a CDTB-9 intelligent packaging machine, which is an integrated intelligent packaging machine for boxing, bagging, plastic sealing and packing. The machine uses an "intelligent manipulator" to put the tea can into the box, so it can avoid bringing microorganisms into the packaging box, causing secondary pollution and affecting the quality of tea products.

[0037] The nitrogen filling machine 8 comprises a conveying chain 801 at the bottom, a tea can mounting seat 802 arranged on the conveying chain 801, a group of tea can placement holes 803 arranged on the tea can mounting seat 802, a cover 804 arranged on the conveying chain 801, a nitrogen inlet pipe 805 and a tea feeding pipe 806 arranged on the cover 804, and a retractable tea discharge joint 807 arranged at the end of the tea feeding pipe 806, which can be driven by a cylinder or a motor. The tea feeding pipe 806 is connected to the discharge port of the microwave light wave sterilizer 7, and the nitrogen inlet pipe 805 is connected to the nitrogen gas source. The tea can first enters the lower part of the nitrogen inlet pipe 805, fills the tea can with nitrogen through the nitrogen inlet pipe 805, removes the air inside, and then transports it to the tea feeding pipe 806 for loading tea. In order to control the amount of tea delivered each time, the tea feeding pipe 806 is provided with a first stop valve 808 and a second stop valve 809, and the distance between the first stop valve 808 and the second stop valve 809 is set according to the amount of tea that needs to be put in each time. When canning tea, first open the first stop valve 808 located at the top to allow the tea in the microwave light wave sterilizer 7 to enter the pipeline between the first stop valve 808 and the second stop valve 809, then close the first stop valve 808, open the second stop valve 809, and allow the tea to fall into the tea can; when canning the next group of tea, repeat the above operation. In order to prevent the loss of nitrogen and the entry of external air, both ends of the cover 804 are provided with a movable baffle 810 and a driving cylinder 811 that drives the movable baffle 810 to move up and down. When a tea can passes, the movable baffle 810 rises and opens, and is closed in other states.

[0038] The ion wind blowing device 10 includes a group of high-pressure air nozzles 101, and the high-pressure air nozzles 101 are arranged on both sides of the conveying line and below the tea cans. The tea cans are inverted on the conveying line 9 for conveying.

[0039] Embodiment 2: An intelligent production line for tea purification and sterilization, wherein a preservation tank 14 for temporarily storing tea leaves is arranged after the microwave light wave sterilizer 7, and the preservation tank 14 always maintains a low temperature of minus 1-3 degrees Celsius, and the discharge port of the preservation tank is connected to the nitrogen filling machine 8 through the tea feeding pipe 806.

[0040] Example 1.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. The present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of protection required. The scope of protection required by the present invention is defined by the attached claims and their equivalents.

Claims

1. An intelligent production line for tea purification and sterilization, comprising an electromagnetic aroma machine, a vibration sieve shaking machine, a vibration air separator, an intelligent metal identification and removal machine, an electrostatic impurity remover, a photoelectric color selection and stem sorting machine, a microwave light wave sterilizer and a nitrogen filling machine for tea canning, which are connected in sequence through a conveying device for conveying tea; and also comprises a conveying line for conveying tea cans, on which an ion wind washing device and a first ultraviolet sterilizer for sterilizing empty tea cans located in front of the nitrogen filling machine are arranged on the conveying line for the tea cans, and a second ultraviolet sterilizer and an intelligent packaging machine are connected in sequence after the nitrogen filling machine; The electromagnetic aroma machine is a 6CHCDL-25 mesh electromagnetic drying machine; the vibration sieve shaker is a 6CDS-82 vibration sieve shaker; the vibration air separator is an FX-60-2 electromagnetic vibration tea air separator; the electrostatic impurity remover is an XDJF-X-720 electrostatic organic impurity separator; the photoelectric color sorting and stem picking machine is a TW6R intelligent photoelectric color sorter; the first ultraviolet sterilizer and the second ultraviolet sterilizer are both UV ultraviolet sterilizers; the microwave light wave sterilizer 7 is a YV-3 microwave and light wave sterilizer; A fresh-keeping tank for temporarily storing tea leaves is also arranged behind the microwave light wave sterilizer, and the discharge port of the fresh-keeping tank is connected to the nitrogen filling machine; The vibrating sieve shaker is equipped with a 10-12 mesh stainless steel sieve; The nitrogen filling machine comprises a conveying chain at the bottom, a tea can mounting seat arranged on the conveying chain, a group of tea can placing holes are arranged on the tea can mounting seat, a cover is arranged on the conveying chain, a nitrogen air inlet pipe and a tea feeding pipe are arranged on the cover, and a retractable tea discharge joint is arranged at the end of the tea feeding pipe, and the tea discharge joint can be driven by a cylinder or a motor; the tea feeding pipe is connected to the discharge port of the microwave light wave sterilizer, and the nitrogen air inlet pipe is connected to the nitrogen gas source; the tea can first enters the bottom of the nitrogen air inlet pipe, and nitrogen is filled into the tea can through the nitrogen air inlet pipe to remove the air inside, and then the tea can is transported to the tea feeding pipe for loading tea; in order to control the delivery amount of tea each time The tea feeding pipe is provided with a first stop valve and a second stop valve, and the distance between the first stop valve and the second stop valve is set according to the amount of tea that needs to be put in each time; when the tea is canned, the first stop valve located at the top is first opened to allow the tea in the microwave light wave sterilizer to enter the pipeline between the first stop valve and the second stop valve, and then the first stop valve is closed and the second stop valve is opened to allow the tea to fall into the tea can; when the next group of tea is canned, the above operation is repeated; in order to prevent the loss of nitrogen and the entry of outside air, movable baffles and driving cylinders that drive the movable baffles to move up and down are provided at both ends of the cover, and when a tea can passes, the movable baffle rises and opens, and is closed in other states.

2. The intelligent production line for tea purification and sterilization as claimed in claim 1, characterized in that: The ion wind blowing device comprises a group of high-pressure air nozzles, and the high-pressure air nozzles are arranged on both sides of the conveying line and below the tea can.

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