Tea-flavored selenium-rich tablet production uses ultrafine pulverizer

Abstract

The application discloses a tea-flavored selenium-rich tablet production ultrafine pulverizer, and belongs to the technical field of selenium-rich tablet processing, which comprises an airflow pulverizer, a bearing seat, a pulverizing bin fixedly installed on the bearing seat, a high-pressure air inlet pipe, a feeding pipe and a discharging pipe arranged on the pulverizing bin, a tea leaf feeding assembly, a storage bin installed on the bearing seat, a feeding hopper fixedly installed on the top of the storage bin and in communication with the interior of the storage bin, the bottom of the storage bin in communication with the feeding pipe, and a separation assembly arranged in the storage bin. When the tea leaves are subjected to ultrafine pulverization, the pulverization space environment of the tea leaves is in a high-nitrogen and oxygen-poor environment, so that during the pulverization of the tea leaves, the oxidation and decomposition of selenium-methionine in the tea leaves caused by oxygen in the pulverization environment air are effectively avoided, the loss of the organic selenium content in the tea leaves is avoided, the organic selenium content in the tea leaf powder is improved, and the quality of the tea-flavored selenium-rich tablet is improved.

Description

Technical Field

[0001] This invention relates to the field of selenium-enriched tablet processing technology, and more specifically, to an ultrafine pulverizer for producing tea-flavored selenium-enriched tablets. Background Technology

[0002] Tea-flavored selenium-enriched tablets are a functional compressed food product made from selenium-enriched tea leaves. Rich in organic selenium, tea polyphenols, amino acids, and other beneficial active ingredients, they combine the flavor of tea with the nutritional benefits of selenium supplementation. With their excellent taste, convenient consumption, and high nutritional value, they are widely favored by consumers. In the industrial processing of tea-flavored selenium-enriched tablets, tea leaf grinding is a core pre-processing step, directly determining the smoothness of the finished product's texture, the uniformity of its components, and the retention rate of effective ingredients. During processing, the dried selenium-enriched tea leaves must first undergo ultra-fine grinding to transform the blocky and flaky tea raw materials into a fine and uniform ultra-fine powder for subsequent mixing and tableting. This is a crucial step in ensuring the shaping effect and product quality of the tea-flavored selenium-enriched tablets.

[0003] The selenium in selenium-enriched tea exists primarily in organic selenium forms such as selenomethionine. Organic selenium has high activity and nutritional value far superior to inorganic selenium, but it is chemically unstable and easily decomposed and lost due to high temperatures and oxidative environments. Compared to traditional hot air drying and high-temperature drying methods, pre-treating selenium-enriched tea using a low-temperature freeze-drying process can rapidly remove internal moisture from the tea leaves in a low-temperature vacuum environment, preserving the original structure, flavor compounds, and organic selenium components of the tea to the greatest extent. This effectively avoids the thermal decomposition of selenium and the deactivation of active ingredients caused by high-temperature drying, significantly reducing selenium loss during the tea pre-treatment stage and laying a solid foundation for the subsequent preparation of high-selenium-content, high-quality tea-flavored selenium-enriched tea tablets.

[0004] Currently, in the industrial production of selenium-enriched tea tablets, the industry generally uses airflow mills to perform ultra-fine grinding of freeze-dried selenium-enriched tea. The conventional method of existing technology utilizes high-speed airflow to drive tea particles to collide, rub, and shear against each other, relying on fluid mechanics to achieve ultra-fine grinding of the tea. This eliminates the need for high-speed mechanical rotor contact grinding, offering advantages such as fine particle size, uniform powder, and no material temperature rise. It effectively avoids selenium loss caused by the high temperatures of mechanical grinding, and can process freeze-dried tea into ultra-fine powder that meets tableting standards. Therefore, it is widely used in the large-scale production of selenium-enriched tea powder.

[0005] However, the existing air jet mills have an open, interconnected grinding chamber, meaning the entire grinding process is conducted in an environment connected to the atmosphere. This allows oxygen from the air to easily enter the grinding chamber of the air jet mill during the grinding of selenium-enriched tea. Although the internal organic selenium structure of freeze-dried tea is preserved intact after low-temperature freeze-drying, organic selenium components such as selenomethionine have weak antioxidant capacity and extremely high activity. During the ultrafine grinding process, the tea particles are torn and collided by the high-speed airflow, resulting in a sharp increase in the specific surface area of ​​the particles. The fresh cross-section is completely exposed to oxygen-containing air, making it extremely easy for it to undergo an oxidation reaction with oxygen. This causes the oxidative decomposition of selenomethionine, leading to a significant loss of organic selenium in the tea powder. Consequently, the effective organic selenium content of the finished tea-flavored selenium-enriched tablets decreases significantly, reducing the product quality of the tea-flavored selenium-enriched tablets.

[0006] In view of this, we propose an ultrafine pulverizer for the production of tea-flavored selenium-enriched tablets. Summary of the Invention

[0007] Technical problems to be solved The purpose of this invention is to provide an ultrafine pulverizer for the production of tea-flavored selenium-enriched tablets, which solves the technical problems mentioned in the background art. Technical solution

[0008] The present invention provides an ultrafine pulverizer for producing tea-flavored selenium-enriched tablets, comprising: An airflow pulverizer includes a support base and a pulverizing chamber fixedly installed on the support base. The pulverizing chamber is equipped with a high-pressure air inlet pipe, a feed pipe, and a discharge pipe. The tea feeding assembly includes a storage bin installed on a support base, a feeding hopper connected to the top of the storage bin, a feeding pipe connected to the bottom of the storage bin, an isolation assembly inside the storage bin that can divide the storage bin into an independent upper cavity and a lower cavity, an airlock assembly for sealing or unsealing the bottom of the feeding hopper installed on the top wall of the storage bin, a one-way valve connected to the upper cavity installed on the side wall of the storage bin, and an oxygen content sensor installed on the top wall of the storage bin. The nitrogen delivery assembly is mounted on a support base and is connected to the high-pressure inlet pipe, the feed pipe, and the upper cavity. A tea powder separation component includes a separation chamber fixedly installed on a support base and connected to a discharge pipe. The separation chamber has a separation component inside, an exhaust hole at the top, and a discharge port at the bottom. The tea powder collection component is located below the separation chamber and connected to the discharge port. The tea powder collection component is equipped with a sealing component, which is used to seal or unseal the discharge port. The gas reflux assembly is mounted on the support base. One end of the gas reflux assembly is connected to the exhaust port, and the other end is connected to the nitrogen delivery assembly.

[0009] As an optional solution of the technical solution of this invention, the airlock assembly includes a fixed frame, a blocking plate, a telescopic rod, and an electric push rod. The fixed frame for sealing the bottom of the feed hopper is fixedly installed on the inner top wall of the storage bin. The top of the fixed frame is provided with a through hole communicating with the feed hopper. An installation cavity is provided on the fixed frame and on one side of the through hole. A horizontal telescopic rod is symmetrically fixed in the installation cavity. A blocking plate for sealing the through hole is movably inserted horizontally on one side of the installation cavity. The blocking plate is fixedly connected to the telescopic ends of the two telescopic rods. An electric push rod for driving the blocking plate to slide is fixedly installed in the installation cavity. The isolation assembly includes an isolation hopper fixedly installed in the middle of the inner wall of the storage hopper. The isolation hopper has a guide port in the middle and an airlock assembly two for sealing or unsealing the guide port is fixedly installed at the bottom of the isolation hopper.

[0010] As an optional solution to the technical solution of this invention, the nitrogen delivery assembly includes a first delivery pipe, a three-way diverter pipe, a second delivery pipe, and a booster pump. The booster pump is fixedly installed on the support base. The first delivery pipe is fixedly installed on the support base. The end of the first delivery pipe is fixedly connected to the three-way diverter pipe. The other two ends of the three-way diverter pipe are respectively connected to the end of the feed pipe and the air inlet of the booster pump. The end of the high-pressure air inlet pipe is connected to the air outlet of the booster pump. A first solenoid valve is fixedly installed on the first delivery pipe. The second delivery pipe is connected through the first delivery pipe and on the side of the first delivery pipe away from the three-way diverter pipe. The other end of the second delivery pipe passes through the storage bin and is connected to the interior of the upper cavity. A second solenoid valve is fixedly installed on the second delivery pipe.

[0011] As an optional solution of the technical solution in this invention document, the separation component includes a filter bag fixedly installed on the top wall of the separation chamber, and the filter bag is sleeved outside the exhaust hole. A horizontal plate is fixedly installed inside the separation chamber and below the filter bag. A vibration plate is fixedly connected to the bottom of the filter bag, and a connecting spring fixedly installed on the top of the horizontal plate and connected to the bottom of the vibration plate.

[0012] As an optional solution of the technical solution of this invention document, the tea powder collection assembly includes a collection box fixedly installed on the support seat. The top of the collection box is sleeved outside the discharge port and fixedly connected to the separation chamber. A sealing assembly is installed inside the collection box. A slot communicating with the inside is opened on one side of the collection box and below the sealing assembly. A collection box with an open top is inserted into the slot. A bracket is fixedly installed on the side wall of the collection box. A horizontal rotating rod is rotatably installed on the bracket. A limiting plate that can abut against the collection box is fixedly connected to the end of the rotating rod. A worm gear assembly connected to the rotating rod is installed on the bracket. The sealing assembly includes a mounting frame fixedly installed on the inner side wall of the collection box. A horizontally oriented rotating shaft is symmetrically fixed inside the mounting frame. A sealing plate is rotatably connected to the outside of the rotating shaft. A coil spring is fixedly connected between the rotating shaft and the sealing plate. When both sealing plates are horizontal, the sides of the two sealing plates that are close to each other fit together and seal the discharge port. Fixed air pipes are symmetrically fixedly installed on the mounting frame on the side of the two rotating shafts that are far apart from each other. A corrugated hose is fixedly connected to the bottom of the fixed air pipe. The bottom of the corrugated hose is fixedly connected to the top of the sealing plate. The other ends of both fixed air pipes penetrate the side wall of the collection box, and the ends of both fixed air pipes are fixedly connected to the same air injection pipe.

[0013] As an optional solution to the technical solution of this invention, the gas reflux assembly includes a vacuum pump fixedly installed on a support base. The inlet end of the vacuum pump is connected to the exhaust port through a connecting pipe one, and the outlet end is fixedly connected to a connecting pipe two. A one-way valve two is fixedly installed at the other end of the connecting pipe two. A connecting pipe three is fixedly connected to the other end of the one-way valve two and is connected to a three-way diverter pipe. An exhaust pipe is connected through the connecting pipe two, and a solenoid valve three is fixedly installed on the exhaust pipe.

[0014] As an optional solution to the technical solution of this invention, a cooling pipe is fixedly connected to the end of the high-pressure intake pipe, and the high-pressure intake pipe is connected to the outlet of the booster pump through the cooling pipe.

[0015] As an optional solution to the technical solution of this invention, the support is equipped with a waste gas collection assembly for collecting the waste gas discharged from the one-way valve, and the waste gas collection assembly is connected to the gas injection pipe. The exhaust gas collection assembly includes a fixed base fixedly mounted on a support seat. An air bladder is installed inside the fixed base. An air inlet pipe and an exhaust pipe are connected through the top of the air bladder. The other end of the air inlet pipe is sleeved outside a one-way valve and fixedly connected to the side wall of the storage bin. An air guide box is fixedly mounted on the support seat. The end of the exhaust pipe is connected through the side wall of the air guide box. A vent hole communicating with the interior of the air guide box is opened at the top of the air guide box. A one-way valve communicating with the interior of the air guide box is fixedly mounted at the top of the air guide box. A horizontal rotating shaft is rotatably mounted on the air guide box. The rotating shaft is coaxially fixedly connected to a rotating rod. One end of the rotating shaft extends into the air guide box and is fixedly connected to an adjusting plug. The adjusting plug can block the one-way valve or the exhaust pipe. An air injection pipe is connected through the air guide box. A pressure relief valve is fixedly mounted on the air bladder.

[0016] As an optional solution of the technical solution in this invention document, an installation hole is provided at the top of one side of the grinding chamber. An installation block for sealing the installation hole is fixedly installed on the grinding chamber. An oxygen content sensor is fixedly installed on the installation block and inside the grinding chamber. An exhaust port communicating with the interior of the grinding chamber is provided on the side wall of the grinding chamber. A vent shell for sealing the exhaust port is fixedly installed on the grinding chamber. A vent pipe is connected through the vent shell. A solenoid valve is fixedly installed on the vent pipe. The other end of the vent pipe is connected through the air inlet pipe. A filter plate for sealing the interior of the vent shell is fixedly installed inside.

[0017] As an optional solution to the technical solution of this invention, the mounting block is equipped with a cleaning component for cleaning the oxygen content sensor, which includes a rotating rod rotatably mounted on the mounting block, and a cleaning brush that can contact the oxygen content sensor is fixedly mounted at the end of the rotating rod.

[0018] By adopting the above technical solution, during the tea pulverization process, when the drive shaft on the pulverizing chamber rotates at high speed, driving the grading wheel to rotate at high speed, the reduction gearbox drives the rotating rod to rotate, thereby driving the cleaning brush to rotate around the rotating rod. During the rotation of the cleaning brush around the rotating rod, it comes into contact with the oxygen content sensor, thereby cleaning the surface of the oxygen content sensor. This effectively prevents dust from adhering to the oxygen content sensor during the pulverization process in the pulverizing chamber, which would reduce the sensitivity of the oxygen content sensor. This improves the accuracy of monitoring the oxygen content of the gas in the pulverizing chamber and ensures the pulverization effect of selenium-rich tea in a high-nitrogen and low-oxygen environment. Beneficial effects

[0019] One or more technical solutions provided in this invention have at least the following technical effects or advantages: 1. When ultra-fine grinding tea leaves, the grinding environment is kept in a high-nitrogen, low-oxygen environment. This effectively prevents the oxidation and decomposition of selenomethionine in the tea leaves caused by oxygen in the air during grinding, thus avoiding the loss of organic selenium content. This increases the organic selenium content in the tea powder and helps improve the quality of selenium-enriched tea tablets.

[0020] 2. Through the design of the airlock component one and the isolation component, and with the cooperation of the oxygen content sensor two, when the oxygen content of the gas in the upper chamber is monitored to be within the preset threshold range in the main controller, the tea leaves can be fed into the lower chamber through the cooperation of the airlock component one and the airlock component two. This achieves the effect of feeding tea leaves under high nitrogen and low oxygen conditions, effectively preventing oxygen in the air from entering the pulverizer during feeding and causing the oxidation and decomposition of selenomethionine in the tea leaves, and further preventing the loss of organic selenium content during the tea pulverization process.

[0021] 3. Through the design of the cooling pipe, during the tea pulverization process, before the gas in the high-pressure air inlet pipe flows into the pulverizing chamber, it is pressurized by the booster pump and then flows into the cooling pipe before entering the high-pressure air inlet pipe. As the gas flows in the cooling pipe, it is cooled by the cooling pipe, thus preventing the gas pressurized by the booster pump from directly entering the pulverizing chamber. This effectively avoids the temperature rise caused by the pressurized gas, which would otherwise lead to an increase in the pulverizing environment temperature inside the pulverizing chamber. This prevents the accelerated oxidation of selenomethionine due to the increased pulverizing environment temperature, and further avoids the loss of organic selenium content during the tea pulverization process.

[0022] 4. During the feeding of tea leaves, when air in the upper chamber is discharged through the one-way valve, it flows into the air bladder through the air inlet duct. Because the end of the exhaust duct is blocked by the adjusting plate, the gas flowing into the air bladder is compressed and collected inside the air bladder. The air bladder itself deforms, achieving the effect of collecting the exhaust gas discharged from the one-way valve and providing a power source for the rotation of the blocking plate, thus realizing the utilization of exhaust gas. There is no need to add a power source to the blocking plate, reducing the energy consumption of this equipment. Through the design of the pressure relief valve, the pressure stored inside the air bladder is automatically depressurized, effectively preventing the air bladder from bursting and being damaged due to excessive gas collection inside.

[0023] 5. During tea pulverization, oxygen sensor 1 monitors the oxygen content of the gas in the pulverizing chamber in real time. When oxygen sensor 1 detects that the oxygen content in the pulverizing chamber is lower than the preset threshold in the main controller, the main controller controls solenoid valves 1 and 4 to open, and uses an external nitrogen delivery pump to deliver nitrogen into the delivery pipe 1. The nitrogen enters the pulverizer, increasing the amount of nitrogen inside, and the gas in the pulverizing chamber is discharged through the vent shell and vent pipe. As the amount of nitrogen inside the pulverizer increases, the oxygen content of the gas inside the pulverizer decreases. When oxygen sensor 1 detects that the oxygen content in the pulverizing chamber is within the preset threshold range in the main controller, it controls solenoid valves 1 and 4 to close, thereby ensuring that the inside of the pulverizer is in a high-nitrogen, low-oxygen state.

[0024] 6. When collecting and processing the tea powder in the collection box, rotate the worm gear to drive the rotating rod to rotate, so that the limiting plate rotates around the rotating rod to a vertical position and does not contact the collection box. This cancels the limitation on the collection box, and the collection box can then be pulled out of the slot for easy disassembly, thus facilitating the collection and processing of the tea powder in the collection box.

[0025] 7. Through the design of the sealing component, when the limiting plate rotates around the rotating rod to a vertical position, it drives the rotating shaft to rotate synchronously. The adjusting sealing plate rotates around the rotating shaft to seal the bottom of the one-way valve. The two sealing plates rotate to a horizontal position to seal the discharge port. The coil spring deforms, which on the one hand prevents tea waste from continuously falling onto the bottom wall of the collection box when the collection box is disassembled, thus avoiding the inconvenience of collecting and processing tea powder. On the other hand, it effectively prevents the gas in the separation chamber from flowing with the external gas through the collection box, which would cause nitrogen loss in the separation chamber and reduce the oxygen content of the gas inside the pulverizer. This helps to ensure that the inside of the pulverizer is in a high-nitrogen and low-oxygen environment. During this period, the waste gas collected in the air bag serves as the power source for the rotation of the sealing plate, realizing the waste gas utilization effect. There is no need to add a power source to the sealing plate, thus reducing the energy consumption of the equipment.

[0026] 8. Through the design of the cleaning component, during the tea pulverization process, the high-speed rotation of the drive shaft on the pulverizing chamber drives the grading wheel to rotate at high speed. This, in turn, drives the rotating rod to rotate via the reduction gearbox, causing the cleaning brush to rotate around the rotating rod. During this rotation, the cleaning brush comes into contact with the oxygen content sensor, thus cleaning its surface. This effectively prevents dust from adhering to the oxygen content sensor during tea pulverization, which could reduce its sensitivity. Consequently, the accuracy of oxygen content monitoring in the pulverizing chamber is improved, ensuring the pulverization effect of selenium-rich tea in a high-nitrogen, low-oxygen environment. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 This is a cross-sectional view of the tea feeding assembly of the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of one of the airlock components of the present invention.

[0030] Figure 4 This is a schematic diagram of the installation structure of the nitrogen delivery assembly of the present invention.

[0031] Figure 5 This is a cross-sectional view of the tea powder separation component of the present invention.

[0032] Figure 6 This is a schematic diagram of the installation structure of the sealing component of the present invention.

[0033] Figure 7 This is a schematic diagram of the installation structure of the limiting plate of the present invention.

[0034] Figure 8 This is a partial structural schematic diagram of the waste gas collection component of the present invention.

[0035] Figure 9This is a schematic diagram of the mounting structure of the mounting block of the present invention.

[0036] Explanation of the labels in the diagram: 1. Airflow pulverizer; 11. Support base; 12. Pulverizing chamber; 121. Vent housing; 122. Vent pipe; 123. Solenoid valve four; 124. Filter plate; 13. High-pressure air inlet pipe; 131. Cooling pipe; 14. Feed pipe; 15. Discharge pipe; 2. Tea feeding assembly; 21. Storage bin; 22. Feed hopper; 23. Isolation assembly; 231. Isolation hopper; 232. Airlock assembly II; 24. One-way valve I; 25. Upper cavity; 26. Lower cavity; 27. Airlock assembly I; 271. Fixing frame I; 272. Blocking plate I; 273. Telescopic rod I; 274. Electric actuator I; 275. Through hole I; 28. Oxygen sensor II.

[0037] 3. Nitrogen delivery assembly; 31. Delivery pipe one; 32. Three-way diverter pipe; 33. Delivery pipe two; 34. Booster pump; 35. Solenoid valve one; 36. Solenoid valve two; 4. Tea powder separation component; 41. Separation chamber; 42. Separation part; 421. Filter bag; 422. Horizontal plate; 423. Vibrating plate; 424. Connecting spring; 43. Exhaust port; 44. Discharge port; 5. Tea powder collection component; 51. Collection box; 52. Collection container; 53. Support; 54. Rotating rod; 55. Limiting plate; 56. Worm gear assembly; 6. Sealing assembly; 61. Mounting frame; 62. Rotary shaft; 63. Sealing plate; 64. Fixed air tube; 65. Corrugated hose; 66. Injection tube; 7. Gas reflux assembly; 71. Air pump; 72. Connecting pipe two; 73. One-way valve two; 74. Exhaust pipe; 75. Solenoid valve three; 8. Exhaust gas collection assembly; 81. Mounting base; 82. Airbag; 83. Inlet duct; 84. Exhaust duct; 85. Air guide box; 86. One-way valve three; 87. Rotating shaft; 88. Adjusting plug; 89. Pressure relief valve; 9. Mounting block; 91. Oxygen sensor 1; 92. Cleaning components; 921. Rotating rod; 922. Cleaning brush. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a link; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] Reference Figures 1 to 9 This invention provides an ultrafine pulverizer for producing tea-flavored selenium-enriched tablets, comprising: Airflow pulverizer 1 includes a support base 11 and a pulverizing chamber 12 fixedly installed on the support base 11. The pulverizing chamber 12 is provided with a high-pressure air inlet pipe 13, a feed pipe 14 and a discharge pipe 15. Specifically, the airflow pulverizer 1 is an existing structure. A drive shaft is also rotatably installed on the pulverizing chamber 12. The end of the drive shaft extends to the pulverizing chamber 12 and is coaxially fixed to a classifying wheel. The discharge pipe 15 is connected to the inside of the classifying wheel. The pulverizing chamber 12 is also provided with several Laval nozzles, all of which are connected to the high-pressure air inlet pipe 13. The installation structure of the Laval nozzles, drive shaft and classifying wheel are all existing technologies and will not be described in detail here. The tea feeding assembly 2 includes a storage bin 21 installed on the support base 11. A feed hopper 22 connected to the top of the storage bin 21 is fixedly installed therein. The bottom of the storage bin 21 is connected to the feed pipe 14. An isolation assembly 23 is provided inside the storage bin 21. The isolation assembly 23 can divide the inside of the storage bin 21 into an independent upper cavity 25 and a lower cavity 26. An airlock assembly 27 for sealing or unsealing the bottom of the feed hopper 22 is installed on the top wall of the storage bin 21. A one-way valve 24 connected to the inside of the upper cavity 25 is fixedly installed on the side wall of the storage bin 21. An oxygen content sensor 28 is fixedly installed on the top wall of the storage bin 21. The oxygen content sensor 28 is communicatively connected to a main controller. The main controller has a preset oxygen content threshold in the pulverizer. The one-way valve 24 flows unidirectionally away from the storage bin 21. Nitrogen delivery assembly 3 is mounted on the support 11 and is connected to the high-pressure inlet pipe 13, the feed pipe 14 and the upper cavity 25. The tea powder separation component 4 includes a separation chamber 41 fixedly installed on the support 11 and connected to the discharge pipe 15. The separation chamber 41 has a separation component 42 inside, an exhaust hole 43 at the top, and a discharge port 44 at the bottom. The tea powder collection component 5 is located below the separation chamber 41 and is connected to the discharge port 44. The tea powder collection component 5 is equipped with a sealing component 6, which is used to seal or unseal the discharge port 44. The gas reflux assembly 7 is installed on the support base 11. One end of the gas reflux assembly 7 is connected to the exhaust port 43 and the other end is connected to the nitrogen delivery assembly 3.

[0042] In the above scheme, during the ultrafine grinding of tea leaves, the grinding environment is kept in a high-nitrogen, low-oxygen environment. This effectively prevents the oxidation and decomposition of selenomethionine in the tea leaves caused by oxygen in the air during grinding, thus avoiding the loss of organic selenium content and increasing the organic selenium content in the tea powder, which helps improve the quality of the selenium-enriched tea tablets. Through the design of the airlock component 27 and the isolation component 23, and with the cooperation of the oxygen content sensor 28, when the oxygen content in the upper cavity 25 is monitored to be within the preset threshold range of the main controller, the tea leaves can be fed into the lower cavity 26 through the cooperation of the airlock component 27 and the airlock component 232. This achieves the effect of feeding tea leaves under high-nitrogen, low-oxygen conditions, effectively preventing oxygen in the air from entering the grinder during feeding and causing the oxidation and decomposition of selenomethionine in the tea leaves, further preventing the loss of organic selenium content during the tea grinding process. Because nitrogen has advantages such as chemical inertness, non-toxicity, and high stability, the nitrogen added to the grinding chamber 12 will not react with elements such as organic selenium in the selenium-rich tea, thus preventing the loss of organic selenium and not affecting the tea grinding effect.

[0043] In this embodiment, the airlock assembly 27 includes a fixed frame 271, a blocking plate 272, a telescopic rod 273, and an electric push rod 274. The inner top wall of the storage bin 21 is fixedly installed with a fixed frame 271 for sealing the bottom of the feed hopper 22. The top of the fixed frame 271 has a through hole 275 that communicates with the feed hopper 22. The fixed frame 271 and one side of the through hole 275 have an installation cavity. The horizontal telescopic rod 273 is symmetrically fixed in the installation cavity. The blocking plate 272 for sealing the through hole 275 is movably inserted horizontally through one side of the installation cavity. The blocking plate 272 is fixedly connected to the telescopic ends of the two telescopic rods 273. The electric push rod 274 for driving the blocking plate 272 to slide is fixedly installed in the installation cavity. The isolation assembly 23 includes an isolation hopper 231 fixedly installed in the middle of the inner wall of the storage hopper 21. The isolation hopper 231 has a guide port in the middle, and an airlock assembly 232 for sealing or unsealing the guide port is fixedly installed at the bottom of the isolation hopper 231. Specifically, the installation structure of the airlock assembly 232 is the same as that of the airlock assembly 27, as detailed below. Figure 2 As shown.

[0044] In this embodiment, the nitrogen delivery assembly 3 includes a first delivery pipe 31, a three-way diverter pipe 32, a second delivery pipe 33, and a booster pump 34. The booster pump 34 is fixedly installed on the support 11. The first delivery pipe 31 is fixedly installed on the support 11 and connected to an external nitrogen delivery pump. The end of the first delivery pipe 31 is fixedly connected to the three-way diverter pipe 32. The other two ends of the three-way diverter pipe 32 are respectively connected to the end of the feed pipe 14 and the air inlet of the booster pump 34. The end of the high-pressure air inlet pipe 13 is connected to the air outlet of the booster pump 34. A first solenoid valve 35 is fixedly installed on the first delivery pipe 31. The second delivery pipe 33 is connected through the first delivery pipe 31 on the side of the first delivery pipe 31 away from the three-way diverter pipe 32. The other end of the second delivery pipe 33 passes through the storage bin 21 and is connected to the interior of the upper cavity 25. A second solenoid valve 36 is fixedly installed on the second delivery pipe 33.

[0045] In this embodiment, the separation component 42 includes a filter bag 421 fixedly installed on the top wall of the separation chamber 41, and the filter bag 421 is sleeved outside the exhaust port 43. A horizontal plate 422 is fixedly installed inside the separation chamber 41 and below the filter bag 421. A vibration plate 423 is fixedly connected to the bottom of the filter bag 421. A vibration motor is fixedly installed inside the vibration plate 423. A connecting spring 424 fixedly connected to the bottom of the vibration plate 423 is fixedly installed on the top of the horizontal plate 422.

[0046] In this embodiment, the tea powder collection assembly 5 includes a collection box 51 fixedly installed on the support seat 11. The top of the collection box 51 is sleeved outside the discharge port 44 and fixedly connected to the separation chamber 41. The sealing assembly 6 is installed inside the collection box 51. A slot communicating with the inside is opened on one side of the collection box 51 and below the sealing assembly 6. A collection box 52 with an open top is inserted into the slot. A bracket 53 is fixedly installed on the side wall of the collection box 51. A horizontal rotating rod 54 is rotatably installed on the bracket 53. A limiting plate 55 that can abut against the collection box 52 is fixedly connected to the end of the rotating rod 54. When the limiting plate 55 rotates around the rotating rod 54 to a horizontal position, the limiting plate 55 abuts against the collection box 52. A worm gear assembly 56 connected to the rotating rod 54 is installed on the bracket 53. The worm gear assembly 56 includes a worm wheel fixedly connected to the rotating rod 54 on the same axis, and a worm gear rotatably installed on the bracket 53 and meshing with the worm wheel. The sealing assembly 6 includes a mounting frame 61 fixedly installed on the inner side wall of the collection box 51. A horizontally oriented rotating shaft 62 is symmetrically fixed inside the mounting frame 61. A sealing plate 63 is rotatably connected to the outside of the rotating shaft 62. A coil spring is fixedly connected between the rotating shaft 62 and the sealing plate 63. When both sealing plates 63 are horizontal, the sides of the two sealing plates 63 that are close to each other fit together and seal the discharge port 44. A fixed air pipe 64 is symmetrically fixedly installed on the mounting frame 61 on the side of the two rotating shafts 62 that are far apart from each other. A corrugated hose 65 is fixedly connected to the bottom of the fixed air pipe 64. The bottom of the corrugated hose 65 is fixedly connected to the top of the sealing plate 63. The other ends of both fixed air pipes 64 penetrate the side wall of the collection box 51, and the ends of both fixed air pipes 64 are fixedly connected to the same air injection pipe 66.

[0047] In this embodiment, the gas reflux assembly 7 includes a vacuum pump 71 fixedly installed on the support 11. The inlet end of the vacuum pump 71 is connected to the exhaust port 43 through a connecting pipe 1, and the outlet end is fixedly connected to a connecting pipe 2 72. A one-way valve 2 73 is fixedly installed at the other end of the connecting pipe 2 72. A connecting pipe 3 is fixedly connected to the other end of the one-way valve 2 73 and is connected to the three-way diverter pipe 32. The one-way valve 2 73 flows unidirectionally along the direction of the connecting pipe 3. An exhaust pipe 74 is connected through the connecting pipe 2 72, and a solenoid valve 3 75 is fixedly installed on the exhaust pipe 74.

[0048] In this embodiment, a cooling pipe 131 is fixedly connected to the end of the high-pressure air intake pipe 13. The cooling pipe 131 is connected to an external cold water circulation device. The high-pressure air intake pipe 13 is connected to the air outlet of the booster pump 34 through the cooling pipe 131.

[0049] In the above scheme, during the tea pulverization process, before the gas in the high-pressure air inlet pipe 13 flows into the pulverizing chamber 12, it is pressurized by the booster pump 34 and then flows into the high-pressure air inlet pipe 13. The gas first flows into the cooling pipe 131 and then into the high-pressure air inlet pipe 13. When the gas flows in the cooling pipe 131, it is cooled by the cooling pipe 131, thereby preventing the gas pressurized by the booster pump 34 from directly entering the pulverizing chamber 12. This effectively avoids the situation where the temperature rises after the gas is pressurized, causing the pulverizing environment temperature in the pulverizing chamber 12 to rise, thereby avoiding the situation where the pulverizing environment temperature rises and accelerates the oxidation of selenomethionine, and further avoiding the loss of organic selenium content during the tea pulverization process.

[0050] In this embodiment, the support 11 is equipped with an exhaust gas collection assembly 8 for collecting exhaust gas discharged from the one-way valve 24, and the exhaust gas collection assembly 8 is connected to the air injection pipe 66. The exhaust gas collection assembly 8 includes a fixed base 81 fixedly mounted on a support 11. An air bladder 82 is installed inside the fixed base 81. An inlet duct 83 and an exhaust duct 84 are connected through the top of the air bladder 82. The other end of the inlet duct 83 is sleeved outside a one-way valve 24 and fixedly connected to the side wall of the storage silo 21. A venting box 85 is fixedly mounted on the support 11. The end of the exhaust duct 84 is connected through the side wall of the venting box 85. A vent hole communicating with the interior of the venting box 85 is opened at the top. A one-way valve 86 communicating with the interior of the venting box 85 is fixedly mounted at the top of the venting box 85. A horizontally oriented rotating shaft 87 is mounted on the upper part of the air bladder 82. The rotating shaft 87 is coaxially fixedly connected to the rotating rod 54. One end of the rotating shaft 87 extends into the air guide box 85 and is fixedly connected to an adjusting plug plate 88. The adjusting plug plate 88 can block the one-way valve 86 or the exhaust pipe 84. Specifically, when the limiting plate 55 rotates around the rotating rod 54 to a horizontal position, the adjusting plug plate 88 blocks the end of the exhaust pipe 84. When the limiting plate 55 rotates around the rotating rod 54 to a vertical position, the adjusting plug plate 88 blocks the bottom of the one-way valve 86. The air injection pipe 66 is connected to the air guide box 85. A pressure relief valve 89 is fixedly mounted on the air bladder 82.

[0051] In this embodiment, a mounting hole is provided at the top of one side of the grinding chamber 12. A mounting block 9 for sealing the mounting hole is fixedly installed on the grinding chamber 12. An oxygen content sensor 91 is fixedly installed on the mounting block 9 and inside the grinding chamber 12. The oxygen content sensor 91 is communicatively connected to the main controller. An exhaust port communicating with the interior of the grinding chamber 12 is provided on the side wall of the grinding chamber 12. A vent shell 121 for sealing the exhaust port is fixedly installed on the grinding chamber 12. A vent pipe 122 is connected through the vent shell 121. A solenoid valve 123 is fixedly installed on the vent pipe 122. The other end of the vent pipe 122 is connected through the air inlet duct 83. A filter plate 124 for sealing the interior of the vent shell 121 is fixedly installed inside the vent shell 121.

[0052] In the above scheme, during the tea pulverization process, oxygen content sensor 91 monitors the oxygen content of the gas in the pulverizing chamber 12 in real time. When oxygen content sensor 91 detects that the oxygen content in the pulverizing chamber 12 is lower than the preset threshold in the main controller, the main controller controls solenoid valve 35 and solenoid valve 123 to open, and uses an external nitrogen delivery pump to deliver nitrogen into the delivery pipe 31. The nitrogen enters the pulverizer, increasing the amount of nitrogen in the pulverizer, and discharges the gas in the pulverizing chamber 12 through the vent shell 121 and vent pipe 122. As the amount of nitrogen in the pulverizer increases, the oxygen content of the gas in the pulverizer decreases. When oxygen content sensor 91 detects that the oxygen content in the pulverizing chamber 12 is within the preset threshold range in the main controller, it controls solenoid valve 35 and solenoid valve 123 to close, thereby ensuring that the pulverizer is in a high nitrogen and low oxygen state.

[0053] In this embodiment, a cleaning component 92 for cleaning the oxygen content sensor 91 is installed on the mounting block 9. The component includes a rotating rod 921 rotatably mounted on the mounting block 9. A cleaning brush 922 that can contact the oxygen content sensor 91 is fixedly installed at the end of the rotating rod 921. In this embodiment, the axial direction of the rotating rod 921 is parallel to the axial direction of the drive shaft on the air jet mill 1, and the rotating rod 921 and the drive shaft are connected by a reduction gearbox. This device can be controlled by a main controller.

[0054] Working principle and usage process of this invention: Before pulverizing freeze-dried tea leaves using this pulverizer, the worm gear is rotated to drive the rotating rod 54 to rotate, causing the limiting plate 55 to rotate around the rotating rod 54 to a horizontal position. First, the solenoid valve 3 75 is opened, the air pump 71 is turned on, and the booster pump 34 is turned on. The electric push rod 1 274 is then controlled to drive the blocking plate 272 to slide and block the through hole 275. At this time, the solenoid valve 1 35 is opened, and nitrogen is delivered into the delivery pipe 31 by an external nitrogen delivery pump. The nitrogen enters the pulverizer and discharges the original air inside the pulverizer through the exhaust pipe 74. During this process, the oxygen content sensor 1 91 and the oxygen content sensor 2 28 monitor the oxygen content of the gas in the pulverizing chamber 12 and the storage chamber 21 in real time. When the oxygen content sensor 1 91 and the oxygen content sensor 2 28 detect that the oxygen content of the gas is within the preset threshold range in the main controller, the solenoid valve 3 75 is closed by the main controller, so that the inside of the pulverizer is in a high-nitrogen and low-oxygen environment.

[0055] When pulverizing freeze-dried tea leaves, the airflow pulverizer 1 is controlled to operate, and the drive shaft on the pulverizing chamber 12 rotates at high speed, driving the grading wheel to rotate at high speed. The airlock assembly 232 is controlled to seal the bottom of the isolation hopper 231, and the electric push rod 274 is controlled to drive the blocking plate 272 to slide open the through hole 275. The freeze-dried tea leaves are quantitatively fed into the feed hopper 22 through the external feeding equipment, and then fall into the upper cavity 25 through the through hole 275. The electric push rod 274 is controlled to drive the blocking plate 272 to slide and seal the through hole 275. Then, the solenoid valve 36 is controlled to open, and nitrogen is delivered into the delivery pipe 31 by the external nitrogen delivery pump, and then delivered into the upper cavity 25 through the delivery pipe 33. The nitrogen enters the upper cavity 25 and purifies the tea leaves. The original gas in chamber 25 is discharged outward through one-way valve 24, reducing the oxygen content of the air in upper chamber 25. When oxygen content sensor 28 detects that the oxygen content of the gas in upper chamber 25 is within the preset threshold range of the main controller, it feeds back to the main controller, which then controls solenoid valve 36 to close. At this time, the air lock assembly 232 is then controlled to remove the seal on the bottom of the isolation hopper 231, allowing the tea leaves in upper chamber 25 to fall into lower chamber 26 through isolation hopper 231, and then into feed pipe 14. During this process, vacuum pump 71 operates, causing nitrogen gas inside the pulverizer to flow into the pulverizing chamber 12 through feed pipe 14 and high-pressure air inlet pipe 13. As the gas in feed pipe 14 flows into pulverizing chamber 12, it blows the tea leaves that have fallen into feed pipe 14 into the pulverizing chamber. Before flowing into the grinding chamber 12, the gas in the high-pressure air inlet pipe 13 is pressurized by the booster pump 34. As the gas flows into the grinding chamber 12, it is sprayed through the Laval nozzle to pulverize the tea leaves. During this process, the drive shaft on the grinding chamber 12 drives the grading wheel to rotate at high speed. The high-speed airflow in the grinding chamber 12 pulverizes the tea leaves, and the high-speed rotation of the grading wheel centrifugally separates the pulverized tea powder. The ultrafine powder that meets the specifications after pulverization enters the grading wheel with the airflow and then passes through the discharge pipe 15 into the separation chamber 41. During this process, the vibration motor in the vibration plate 423 drives the filter bag 421 to vibrate. The gas passes through the filter bag 421 and enters the continuous flow chamber through the exhaust port 43. The tea powder remains in the separation chamber 41 as the filter bag 421 vibrates, causing the tea powder to fall through the discharge port 44 into the collection box 52 for collection. The vacuum pump 71 works to transport the gas in the first connecting pipe to the second connecting pipe 72, and then through the third connecting pipe to the three-way diversion pipe 32, achieving the effect of nitrogen gas recycling. During the ultra-fine grinding of tea, the grinding environment is in a high-nitrogen and low-oxygen environment, which effectively avoids the oxidation and decomposition of selenomethionine in the tea caused by oxygen in the grinding environment, thus preventing the loss of organic selenium content in the tea and increasing the organic selenium content in the tea powder, which helps to improve the quality of the tea-flavored selenium-enriched tablets.During this process, through the design of airlock component 27 and isolation component 23, after the tea leaves in the upper cavity 25 fall into the lower cavity 26 through the isolation hopper 231, the airlock component 232 can be controlled to seal the bottom of the isolation hopper 231. Then, the electric push rod 274 drives the blocking plate 272 to slide open the through hole 275, allowing the freeze-dried tea leaves to be quantitatively conveyed into the feed hopper 22 via an external feeding device. Similarly, nitrogen is injected into the upper cavity 25 to reduce the oxygen content. With the cooperation of oxygen sensor 28, when the oxygen content in the upper cavity 25 is monitored to be within the preset threshold range in the main controller, the tea leaves can be fed into the lower cavity 26 through the cooperation of airlock component 27 and airlock component 232. This achieves the effect of feeding tea leaves under high nitrogen and low oxygen conditions, effectively preventing oxygen in the air from entering the pulverizer during feeding and causing oxidation and decomposition of selenomethionine in the tea leaves, further preventing the loss of organic selenium content during the tea pulverization process.

[0056] During the feeding of tea leaves, when the air in the upper cavity 25 is discharged through the one-way valve 24, it flows into the air bladder 82 through the air inlet duct 83. Because the end of the exhaust duct 84 is blocked by the adjusting block plate 88, the gas flowing into the air bladder 82 is compressed and collected inside the air bladder 82. The air bladder 82 itself deforms, achieving the effect of collecting the exhaust gas discharged from the one-way valve 24, providing a power source for the rotation of the blocking plate 63, realizing the utilization effect of exhaust gas, without the need to add a power source to the blocking plate 63, thus reducing the energy consumption of this equipment. Through the design of the pressure relief valve 89, the automatic pressure relief effect of the gas stored inside the air bladder 82 is achieved, effectively preventing the air bladder 82 from bursting and being damaged due to excessive gas collection inside the air bladder 82.

[0057] By designing the cooling pipe 131, during the tea pulverization process, before the gas in the high-pressure air inlet pipe 13 flows into the pulverizing chamber 12, it is pressurized by the booster pump 34 and then flows into the high-pressure air inlet pipe 13. The gas flows into the cooling pipe 131, where it is cooled. This prevents the gas pressurized by the booster pump 34 from directly entering the pulverizing chamber 12, effectively preventing the temperature from rising after pressurization and thus avoiding an increase in the pulverizing environment temperature within the pulverizing chamber 12. This prevents the oxidation of selenomethionine from accelerating due to the increased pulverizing environment temperature, and further prevents the loss of organic selenium content during the tea pulverization process.

[0058] Furthermore, during the tea pulverization process, oxygen sensor 91 monitors the oxygen content of the gas inside the pulverizing chamber 12 in real time. When oxygen sensor 91 detects that the oxygen content inside the pulverizing chamber 12 is lower than the preset threshold in the main controller, the main controller controls solenoid valves 35 and 123 to open, and uses an external nitrogen delivery pump to deliver nitrogen into the delivery pipe 31. The nitrogen enters the pulverizer, increasing the amount of nitrogen inside, and the gas inside the pulverizing chamber 12 is then vented through the vent shell 121 and the vent. As the amount of nitrogen inside the pulverizer increases, the oxygen content of the gas inside the pulverizer decreases. When the oxygen content sensor 91 detects that the oxygen content in the pulverizing chamber 12 is within the preset threshold range in the main controller, it controls the solenoid valve 35 and solenoid valve 123 to close, thereby ensuring that the inside of the pulverizer is in a high nitrogen and low oxygen state. During this period, when the gas in the pulverizing chamber 12 is discharged through the vent shell 121 and the vent pipe 122, the gas flows through the air inlet pipe 83 to the air bag 82 for collection.

[0059] When collecting tea powder in the collection box 52, the worm gear is rotated, which drives the rotating rod 54 to rotate via the worm wheel. This causes the limiting plate 55 to rotate around the rotating rod 54 to a vertical position, so that the limiting plate 55 no longer contacts the collection box 52. This releases the limiting effect on the collection box 52, allowing it to be pulled out of the slot for easy disassembly and collection of the tea powder. During this process, the sealing component 6, when the limiting plate 55 rotates around the rotating rod 54 to a vertical position, drives the rotating shaft 87 to rotate synchronously. The adjusting blocking plate 88 rotates around the rotating shaft 87 to seal the bottom of the one-way valve 86. At this time, the adjusting blocking plate 88 does not seal the end of the exhaust pipe 84. The airbag 82 contracts, transporting its internal gas through the exhaust pipe 84 to the air guide box 85, and then through the air injection pipe 66 to the two fixed air pipes 64. Gas flows into the two corrugated hoses 65. As the amount of gas in the corrugated hoses 65 increases, the corrugated hoses 65 stretch and drive the sealing plates 63 to rotate around the shaft 62. This causes the two sealing plates 63 to rotate horizontally and block the discharge port 44. The coil spring deforms, which on the one hand prevents tea waste from continuously falling onto the bottom wall of the collection box 51 when the collection box 52 is disassembled, thus avoiding inconvenience in collecting and processing tea powder. On the other hand, it effectively prevents the gas in the separation chamber 41 from flowing with the outside gas through the collection box 51, which would cause nitrogen loss from the separation chamber 41 and reduce the oxygen content inside the pulverizer. This helps to ensure that the pulverizer is in a high-nitrogen and low-oxygen environment. During this process, the waste gas collected in the air bag 82 serves as the power source for the rotation of the sealing plates 63, achieving the effect of waste gas utilization. There is no need to add a power source to the sealing plates 63, thus reducing the energy consumption of the equipment.

[0060] After the tea powder collected in the collection box 52 is processed, the collection box 52 is inserted into the slot, and then the worm gear is rotated in the opposite direction to make the limiting plate 55 rotate around the rotating rod 54 to a horizontal position, so that the collection box 52 can be limited by the limiting plate 55. During this period, the adjusting blocking plate 88 blocks the end of the exhaust pipe 84, and the adjusting blocking plate 88 does not block the one-way valve 86. At this time, the two coil springs return to their natural state, and the two blocking plates 63 rotate around the rotating shaft 62 to reset, thereby canceling the blockage of the discharge port 44. The tea powder in the separation chamber 41 can then be discharged through the discharge port 44 and fall into the collection box 52. During this period, when the blocking plate 63 rotates around the rotating shaft 62 to reset, the corrugated hose 65 is compressed by force. The gas in the corrugated hose 65 flows back to the air guide box 85 through the fixed air pipe 64 and the air injection pipe 66, and then is discharged through the one-way valve 86.

[0061] By designing the cleaning component 92, during the tea pulverization process, when the drive shaft on the pulverizing chamber 12 rotates at high speed, driving the grading wheel to rotate at high speed, the reduction gearbox drives the rotating rod 921 to rotate, thereby causing the cleaning brush 922 to rotate around the rotating rod 921. During the rotation of the cleaning brush 922 around the rotating rod 921, it comes into contact with the oxygen content sensor 91, thereby cleaning the surface of the oxygen content sensor 91. This effectively prevents dust from adhering to the oxygen content sensor 91 during tea pulverization in the pulverizing chamber 12, which would reduce the sensitivity of the oxygen content sensor 91. This improves the accuracy of monitoring the oxygen content of the gas in the pulverizing chamber 12 and ensures the pulverization effect of selenium-rich tea in a high-nitrogen, low-oxygen environment.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultrafine pulverizer for producing tea-flavored selenium-enriched tablets, characterized in that, include: An airflow pulverizer includes a support base and a pulverizing chamber fixedly installed on the support base. The pulverizing chamber is equipped with a high-pressure air inlet pipe, a feed pipe, and a discharge pipe. The tea feeding assembly includes a storage bin installed on a support base, a feeding hopper connected to the top of the storage bin, a feeding pipe connected to the bottom of the storage bin, an isolation assembly inside the storage bin that can divide the storage bin into an independent upper cavity and a lower cavity, an airlock assembly for sealing or unsealing the bottom of the feeding hopper installed on the top wall of the storage bin, a one-way valve connected to the upper cavity installed on the side wall of the storage bin, and an oxygen content sensor installed on the top wall of the storage bin. The nitrogen delivery assembly is mounted on a support base and is connected to the high-pressure inlet pipe, the feed pipe, and the upper cavity. A tea powder separation component includes a separation chamber fixedly installed on a support base and connected to a discharge pipe. The separation chamber has a separation component inside, an exhaust hole at the top, and a discharge port at the bottom. The tea powder collection component is located below the separation chamber and connected to the discharge port. A sealing component is installed inside the tea powder collection component. The gas reflux assembly is mounted on the support base. One end of the gas reflux assembly is connected to the exhaust port, and the other end is connected to the nitrogen delivery assembly.

2. The ultrafine pulverizer for producing tea-flavored selenium-enriched tablets according to claim 1, characterized in that: The airlock assembly includes a fixed frame, a blocking plate, a telescopic rod, and an electric push rod. The fixed frame is fixedly installed on the inner top wall of the storage bin for sealing the bottom of the feed hopper. The top of the fixed frame has a through hole connected to the feed hopper. An installation cavity is provided on the fixed frame and on one side of the through hole. A horizontal telescopic rod is symmetrically fixed in the installation cavity. A blocking plate is movably inserted horizontally through one side of the installation cavity for sealing the through hole. The blocking plate is fixedly connected to the telescopic ends of the two telescopic rods. An electric push rod is fixedly installed in the installation cavity for driving the blocking plate to slide. The isolation assembly includes an isolation hopper fixedly installed in the middle of the inner wall of the storage hopper. The isolation hopper has a guide port in the middle and an airlock assembly two for sealing or unsealing the guide port is fixedly installed at the bottom of the isolation hopper.

3. The ultrafine pulverizer for producing tea-flavored selenium-enriched tablets according to claim 2, characterized in that: The nitrogen delivery assembly includes a first delivery pipe, a three-way diverter pipe, a second delivery pipe, and a booster pump. The booster pump is fixedly installed on the support base. The first delivery pipe is fixedly installed on the support base. The end of the first delivery pipe is fixedly connected to the three-way diverter pipe. The other two ends of the three-way diverter pipe are respectively connected to the end of the feed pipe and the air inlet of the booster pump. The end of the high-pressure air inlet pipe is connected to the air outlet of the booster pump. A first solenoid valve is fixedly installed on the first delivery pipe. The second delivery pipe is connected through the first delivery pipe and on the side of the first delivery pipe away from the three-way diverter pipe. The other end of the second delivery pipe passes through the storage bin and is connected to the interior of the upper cavity. A second solenoid valve is fixedly installed on the second delivery pipe.

4. The ultrafine pulverizer for producing tea-flavored selenium-enriched tablets according to claim 1, characterized in that: The separation component includes a filter bag fixedly installed on the top wall of the separation chamber, with the filter bag covering the outside of the exhaust port. A horizontal plate is fixedly installed inside the separation chamber below the filter bag. A vibrating plate is fixedly connected to the bottom of the filter bag, and a connecting spring is fixedly installed on the top of the horizontal plate and connected to the bottom of the vibrating plate.

5. The ultrafine pulverizer for producing tea-flavored selenium-enriched tablets according to claim 1, characterized in that: The tea powder collecting assembly includes a collecting box fixedly installed on a support base. The top of the collecting box is fitted outside the discharge port and is fixedly connected to the separation chamber. A sealing assembly is installed inside the collecting box. A slot communicating with the inside is opened on one side of the collecting box and below the sealing assembly. A collecting box with an open top is inserted into the slot. A bracket is fixedly installed on the side wall of the collecting box. A horizontal rotating rod is rotatably installed on the bracket. A limiting plate that can abut against the collecting box is fixedly connected to the end of the rotating rod. A worm gear assembly connected to the rotating rod is installed on the bracket. The sealing assembly includes a mounting frame fixedly installed on the inner side wall of the collection box. A horizontally oriented rotating shaft is symmetrically fixed inside the mounting frame. A sealing plate is rotatably connected to the outside of the rotating shaft. A coil spring is fixedly connected between the rotating shaft and the sealing plate. When both sealing plates are horizontal, the sides of the two sealing plates that are close to each other fit together and seal the discharge port. Fixed air pipes are symmetrically fixedly installed on the mounting frame on the side of the two rotating shafts that are far apart from each other. A corrugated hose is fixedly connected to the bottom of the fixed air pipe. The bottom of the corrugated hose is fixedly connected to the top of the sealing plate. The other ends of both fixed air pipes penetrate the side wall of the collection box, and the ends of both fixed air pipes are fixedly connected to the same air injection pipe.

6. The ultrafine pulverizer for producing tea-flavored selenium-enriched tablets according to claim 3, characterized in that: The gas reflux assembly includes a vacuum pump fixedly installed on a support base. The inlet end of the vacuum pump is connected to the exhaust port through a connecting pipe one, and the outlet end is fixedly connected to a connecting pipe two. A one-way valve two is fixedly installed at the other end of the connecting pipe two. A connecting pipe three, which is connected to a three-way diverter pipe, is fixedly connected to the connecting pipe two. An exhaust pipe is connected through the exhaust pipe, and a solenoid valve three is fixedly installed on the exhaust pipe.

7. The ultrafine pulverizer for producing tea-flavored selenium-enriched tablets according to claim 3, characterized in that: A cooling pipe is fixedly connected to the end of the high-pressure intake pipe, and the high-pressure intake pipe is connected to the outlet of the booster pump through the cooling pipe.

8. The ultrafine pulverizer for producing tea-flavored selenium-enriched tablets according to claim 7, characterized in that: The support is equipped with an exhaust gas collection assembly for collecting exhaust gas discharged from the one-way valve, and the exhaust gas collection assembly is connected to the air injection pipe. The exhaust gas collection assembly includes a fixed base fixedly mounted on a support seat. An air bladder is installed inside the fixed base. An air inlet pipe and an exhaust pipe are connected through the top of the air bladder. The other end of the air inlet pipe is sleeved outside a one-way valve and fixedly connected to the side wall of the storage bin. An air guide box is fixedly mounted on the support seat. The end of the exhaust pipe is connected through the side wall of the air guide box. A vent hole communicating with the interior of the air guide box is opened at the top of the air guide box. A one-way valve communicating with the interior of the air guide box is fixedly mounted at the top of the air guide box. A horizontal rotating shaft is rotatably mounted on the air guide box. The rotating shaft is coaxially fixedly connected to a rotating rod. One end of the rotating shaft extends into the air guide box and is fixedly connected to an adjusting plug. The adjusting plug can block the one-way valve or the exhaust pipe. An air injection pipe is connected through the air guide box. A pressure relief valve is fixedly mounted on the air bladder.

9. The ultrafine pulverizer for producing tea-flavored selenium-enriched tablets according to claim 8, characterized in that: A mounting hole is provided at the top of one side of the grinding chamber. A mounting block for sealing the mounting hole is fixedly installed on the grinding chamber. An oxygen content sensor is fixedly installed on the mounting block inside the grinding chamber. An exhaust port communicating with the interior of the grinding chamber is provided on the side wall of the grinding chamber. A vent shell for sealing the exhaust port is fixedly installed on the grinding chamber. A vent pipe is connected through the vent shell. A solenoid valve is fixedly installed on the vent pipe. The other end of the vent pipe is connected through the air inlet pipe. A filter plate for sealing the interior is fixedly installed inside the vent shell.

10. The ultrafine pulverizer for producing tea-flavored selenium-enriched tablets according to claim 9, characterized in that: The mounting block is equipped with a cleaning component for cleaning the oxygen content sensor, which includes a rotating rod rotatably mounted on the mounting block, and a cleaning brush that can contact the oxygen content sensor is fixedly mounted at the end of the rotating rod.

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