Tea leaf refining production line

Abstract

This utility model relates to a tea refining production line, comprising: a circular sieve machine, a toothed cutter, an air separator, and a straight sieve unit. The circular sieve machine has a first circular sieve outlet, a second circular sieve outlet, a third circular sieve outlet, and a feed inlet. The circular sieve machine is used to separate tea leaves into three specifications based on size: long tea, standard tea, and tea dust. Long tea, standard tea, and tea dust are sequentially output from the first circular sieve outlet, the second circular sieve outlet, and the third circular sieve outlet, respectively. The feed inlet is used to allow tea leaves to enter the circular sieve machine. The toothed cutter has an inlet and an outlet. The inlet is connected to the first circular sieve outlet. The toothed cutter is used to receive and cut the long tea leaves output from the first circular sieve outlet, and the outlet is connected to the inlet. The air separator is used to receive the standard tea leaves output from the second circular sieve outlet and perform air separation on the standard tea leaves. The straight sieve unit is used to receive and continuously convey the tea dust output from the third circular sieve outlet, and during continuous conveying, it grades the tea dust according to size.

Description

Technical Field

[0001] This utility model relates to the field of tea processing technology, and more specifically, to a tea refining production line. Background Technology

[0002] Tea refining refers to the process of further processing tea leaves after initial processing, such as sieving and removing impurities, to improve purity, optimize quality, and standardize specifications. In traditional production lines, circular sieves or other sieving equipment separate tea leaves of different sizes. Operators collect tea leaves that are of acceptable size and those that are too large. Specifically, operators feed the tea leaves of acceptable size sequentially into equipment such as air separators for further refining, while the oversized tea leaves are fed into equipment such as toothed cutters for cutting. The cut tea leaves are then fed back into the circular sieve, and the sieving and air separation steps are repeated to improve the utilization rate of the tea raw materials. On the other hand, operators regularly clean up tea dust that is too small to ensure the smooth progress of refining each batch of tea.

[0003] However, traditional tea refining production lines rely on manual operation, resulting in low production efficiency. Furthermore, the cleaning of tea dust may not be timely, and the accumulation of tea leaves can affect the smooth operation of the production line, further impacting production efficiency. On the other hand, tea dust that is cleaned up regularly may not be effectively utilized in subsequent processes, leading to resource waste. Utility Model Content

[0004] The purpose of this utility model is to provide a tea refining production line, which solves the technical problem of how to improve production efficiency and reduce the waste of tea dust.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0006] This utility model provides a tea refining production line, comprising: a circular sieve machine having a first circular sieve outlet, a second circular sieve outlet, a third circular sieve outlet, and a feed inlet; the circular sieve machine is used to sieve tea leaves into three specifications according to size: large long tea leaves, standard tea leaves of acceptable size, and small tea dust; and the long tea leaves, standard tea leaves, and tea dust are output sequentially from the first circular sieve outlet, the second circular sieve outlet, and the third circular sieve outlet, respectively; the feed inlet is used to allow tea leaves to enter the circular sieve machine; a toothed cutter having an inlet and an outlet; the inlet is connected to the first circular sieve outlet; the toothed cutter is used to receive and cut the long tea leaves output from the first circular sieve outlet through the inlet, and the outlet is connected to the inlet; an air classifier unit for receiving the standard tea leaves output from the second circular sieve outlet and performing air classification on the standard tea leaves; and a straight sieve unit for receiving and continuously conveying the tea dust output from the third circular sieve outlet, and grading the tea dust according to size during continuous conveying.

[0007] In some embodiments of this application, the tea refining production line further includes a feeding hopper, a toothed cutting elevator, a toothed cutting conveyor, and a circular screen elevator; the feeding hopper is used to feed the primary processed tea leaves; the toothed cutting elevator is used to lift the long tea leaves output from the first circular screen outlet to the feeding port of the toothed cutting machine; the toothed cutting conveyor is used to receive and transport the cut long tea leaves output from the outlet of the toothed cutting machine; the circular screen elevator is used to receive the primary processed tea leaves fed by the feeding hopper and the cut long tea leaves transported by the toothed cutting conveyor, and lift the primary processed tea leaves and the cut long tea leaves to the feeding port of the circular screen.

[0008] In some embodiments of this application, the circular screen and the air classifier are arranged sequentially in a first direction, and the straight screen, the circular screen, and the toothed cutter are arranged sequentially in a second direction, with the first and second directions perpendicular to each other. The feed inlet is located at the top of the circular screen and at the end of the circular screen away from the air classifier in the first direction. The first, second, and third circular screen outlets are all located at the end of the circular screen close to the air classifier in the first direction, and the first and third circular screen outlets are respectively located on two opposite sidewalls of the circular screen in the second direction. The second circular screen outlet is located on the endwall of the circular screen facing the air classifier. The circular screen and the toothed cutter conveyor both extend along the first direction, and the circular screen elevator and the toothed cutter elevator both extend along the second direction and are arranged side by side at intervals in the first direction.

[0009] In some embodiments of this application, the straight sieve unit includes a straight sieve machine and a straight sieve elevator. The straight sieve machine extends along the first direction and is provided with a sieve inlet and five sieve outlets. The sieve inlet is located at the top of the straight sieve machine and at the end of the straight sieve machine in the first direction that is close to the circular sieve machine. The five sieve outlets are arranged sequentially along the extension direction of the straight sieve machine and are respectively used to output five different sizes of tea powder. Four of the sieve outlets are located on the side wall of the straight sieve machine, and the other sieve outlet is located on the end wall of the straight sieve machine at the end away from the circular sieve machine in the first direction. The straight sieve elevator is used to lift the tea powder output from the outlet of the third circular sieve to the sieve inlet of the straight sieve machine.

[0010] In some embodiments of this application, the tea refining production line further includes an electrostatic precipitator and a metal detector. The electrostatic precipitator is used to receive the standard tea after it has been air-sorted by the air classifier and to adsorb the light impurities therein. The metal detector is used to receive the standard tea after it has been electrostatically adsorbed by the electrostatic precipitator and to adsorb the metallic impurities therein.

[0011] In some embodiments of this application, the tea refining production line further includes a vibrating feeder for vibrating feeding to the electrostatic unit; the air classifier unit includes an air classifier feed elevator, an air classifier, a cyclone dust collector, and an air classifier discharge elevator. The air classifier is provided with an air classifier inlet, an air inlet, and an air classifier outlet. The air classifier feed elevator is used to lift the standard tea output from the outlet of the second circular sieve to the air classifier inlet of the air classifier. The air classifier discharge elevator is used to lift the air-classified standard tea output from the air classifier outlet to the vibrating feeder. The cyclone dust collector is used to provide airflow to the air inlet to perform air classification on the standard tea in the air classifier.

[0012] In some embodiments of this application, the tea refining production line further includes a bagging elevator and a vibrating screen. The bagging elevator is used to receive the standard tea output by the metal detector and lift it to the vibrating screen, which is used to sieve the standard tea.

[0013] As can be seen from the above technical solution, the embodiments of this utility model have at least the following advantages and positive effects:

[0014] In this embodiment of the tea refining production line, the primary tea leaves enter a circular screen through the feed inlet and are sieved into three specifications: long tea, standard tea, and tea dust. Long tea leaves exit from the first circular screen outlet and enter a toothed cutter through the feed inlet for cutting. After cutting, the tea leaves exit through the toothed cutter outlet and return to the circular screen through the feed inlet for secondary sieving. This cycle of cutting the long tea leaves sieved by the circular screen and returning them to the circular screen for the next sieving continues until the circular screen no longer sieves long tea leaves. Standard tea leaves exit from the second circular screen outlet and enter an air separator. The air separator separates impurities and light debris from the standard tea leaves using airflow, further improving the purity of the standard tea leaves. Tea dust enters the straight sieve unit through the outlet of the third circular sieve, preventing accumulation within the circular sieve and ensuring smooth production line operation. During continuous tea dust conveying, the straight sieve unit grades the tea dust according to its size, facilitating efficient utilization of the resources based on different usage needs and reducing waste. This tea refining production line integrates a circular sieve, a toothed cutter, an air separator, and a straight sieve unit, reducing manual operation, significantly improving production efficiency, and ensuring consistency in quality and specifications across batches. Long tea, standard tea, and tea dust exit from different circular sieve outlets and enter their respective equipment, allowing subsequent processes after separation of these three types of tea to be executed simultaneously, further enhancing production efficiency. Attached Figure Description

[0015] The various objectives, features, and advantages of this invention will become more apparent from the following detailed description of a preferred embodiment of the production line, taken in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0016] Figure 1 This is a schematic diagram of the structure of a tea refining production line shown according to an exemplary implementation of the production line.

[0017] The annotations in the attached figures are explained as follows:

[0018] 1. Circular screen; 11. First circular screen outlet; 12. Second circular screen outlet; 13. Third circular screen outlet; 14. Feed inlet;

[0019] 2. Toothed cutter; 21. Feed inlet;

[0020] 3. Air classifier unit; 31. Air classifier feed elevator; 32. Air classifier; 321. Air classifier inlet; 322. Air inlet; 323. Air classifier outlet; 33. Cyclone dust collector; 34. Air classifier discharge elevator;

[0021] 4. Straight screen unit; 41. Straight screen; 411. Screen inlet; 412. Screen outlet; 42. Straight screen elevator;

[0022] 5. Feed hopper;

[0023] 6. Toothed lifting machine;

[0024] 7. Tooth-cutting leveling conveyor;

[0025] 8. Circular screen elevator;

[0026] 9. Electrostatic discharge unit;

[0027] 10. Metal detector;

[0028] 20. Vibrating feeder;

[0029] 30. Bagging elevator;

[0030] D1, first direction; D2, second direction. Detailed Implementation

[0031] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0032] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0033] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0034] Please see Figure 1 The tea refining production line provided in one embodiment of this utility model mainly includes a circular sieve machine 1, a toothed cutter 2, an air classifier unit 3, and a straight sieve unit 4. The circular sieve machine 1 has a first circular sieve outlet 11, a second circular sieve outlet 12, a third circular sieve outlet 13, and a feed inlet 14. The circular sieve machine 1 is used to sieve the tea leaves inside into three specifications according to their size: large long tea leaves, standard tea leaves of acceptable size, and small tea dust. The long tea leaves, standard tea leaves, and tea dust are sequentially output from the first circular sieve outlet 11, the second circular sieve outlet 12, and the third circular sieve outlet 13, respectively. The feed inlet 14 is used to allow tea leaves to enter the circular sieve machine 1. The toothed cutter 2 has an inlet 21 and an outlet. The inlet 21 is connected to the first circular sieve outlet 11. The toothed cutter 2 is used to receive and cut the long tea leaves output from the first circular sieve outlet 11 through the inlet 21, and the outlet is connected to the inlet 14. The air classifier unit 3 is used to receive the standard tea leaves output from the second circular sieve outlet 12 and perform air classification on the standard tea leaves. The straight sieve unit 4 is used to receive and continuously convey tea dust output from the third circular sieve outlet 13, and to grade the tea dust according to its size during the continuous conveying process.

[0035] In the tea refining production line of this embodiment, the primary processed tea leaves enter the circular screen 1 through the feed inlet 14 and are sieved into three specifications: long tea, standard tea, and tea dust. Long tea leaves are output from the first circular screen outlet 11 and enter the toothed cutter 2 through the feed inlet 21 for cutting. After cutting, the tea leaves are output from the toothed cutter 2 and return to the circular screen 1 through the feed inlet 14 for secondary sieving. This cycle of cutting the long tea leaves sieved by the circular screen 1 and returning them to the circular screen 1 for the next sieving is repeated until the circular screen 1 no longer sieves long tea leaves. Standard tea leaves are output from the second circular screen outlet 12 and enter the air separator 3. The air separator 3 separates impurities and light debris from the standard tea leaves through airflow, further improving the purity of the standard tea leaves. Tea dust enters the straight sieve unit 4 from the third circular sieve outlet 13, preventing tea dust from accumulating inside the circular sieve 1 and ensuring smooth operation of the production line. Furthermore, the straight sieve unit 4, during continuous tea dust conveying, can grade the tea dust according to its size, facilitating efficient utilization of the tea dust resources according to different usage needs and reducing waste. This tea refining production line, through the integration of the circular sieve 1, toothed cutter 2, air separator 3, and straight sieve unit 4, reduces manual operation, significantly improves production efficiency, and ensures consistency in quality and specifications across batches of tea. Long tea, standard tea, and tea dust are output from different circular sieve outlets and enter their respective equipment, allowing subsequent processes after sieving of long tea, standard tea, and tea dust to be executed simultaneously, further improving production efficiency.

[0036] It is conceivable that the standard tea output from the second circular screen outlet 12 into the air separator 3 can be the standard tea obtained by screening the primary processed tea leaves through the circular screen 1, or it can be the standard tea obtained by screening the cut long tea leaves through the circular screen 1. Similarly, the tea dust output from the third circular screen outlet 13 into the straight screen 4 can be the tea dust obtained by screening the primary processed tea leaves through the circular screen 1, or it can be the tea dust obtained by screening the cut long tea leaves through the circular screen 1.

[0037] In a specific embodiment, the tea refining production line also includes a feed hopper 5, a toothed cutting elevator 6, a toothed cutting conveyor 7, and a circular screen elevator 8. The feed hopper 5 is used to feed the primary processed tea leaves. The toothed cutting elevator 6 is used to lift the long tea leaves output from the first circular screen outlet 11 to the feed inlet 21 of the toothed cutting machine 2. The toothed cutting conveyor 7 is used to receive and transport the cut long tea leaves output from the outlet of the toothed cutting machine 2. The circular screen elevator 8 is used to receive the primary processed tea leaves fed from the feed hopper 5 and the cut long tea leaves transported by the toothed cutting conveyor 7, and lifts the primary processed tea leaves and the cut long tea leaves to the feed inlet 14 of the circular screen 1.

[0038] The initial tea leaves are fed into the feed hopper 5 and lifted by the circular screen elevator 8 to the feed inlet 14 of the circular screen 1 for screening. The screened long tea leaves are then fed into the toothed cutter 2 by the toothed cutter elevator 6 for cutting. The cut long tea leaves are then conveyed to the circular screen elevator 8 by the toothed cutter conveyor 7, and finally fed into the circular screen 1 for secondary screening by the circular screen elevator 8. Thus, the feed hopper 5 serves as the starting point of the production line, and the toothed cutter elevator 6, the toothed cutter conveyor 7, and the circular screen elevator 8 connect the circular screen 1 and the toothed cutter 2, thereby ensuring the continuity and smoothness of the production line.

[0039] In a specific embodiment, the circular screen 1 and the air classifier unit 3 are arranged sequentially in the first direction D1, and the straight screen unit 4, the circular screen 1, and the toothed cutter 2 are arranged sequentially in the second direction D2, with the first direction D1 and the second direction D2 being perpendicular to each other. The feed inlet 14 is located at the top of the circular screen 1, at the end of the circular screen 1 away from the air classifier unit 3 in the first direction D1. The first circular screen outlet 11, the second circular screen outlet 12, and the third circular screen outlet 13 are all located at the end of the circular screen 1 close to the air classifier unit 3 in the first direction D1, and the first circular screen outlet 11 and the third circular screen outlet 13 are respectively located on two opposite side walls of the circular screen 1 in the second direction D2, while the second circular screen outlet 12 is located on the side wall of the circular screen 1 facing the air classifier unit 3. The circular screen 1 and the toothed cutter conveyor 7 both extend along the first direction D1, and the circular screen elevator 8 and the toothed cutter elevator 6 both extend along the second direction D2, and are arranged side by side at intervals in the first direction D1.

[0040] The arrangement of the circular screen 1, air classifier 3, straight screen 4, and toothed cutter 2 in the production line ensures a clear material flow path between long tea, standard tea, and tea dust, eliminating cross-interference. The position of each circular screen outlet ensures a tight connection between the circular screen 1, air classifier 3, toothed cutter 2, and straight screen 4, reducing material retention, unnecessary conveying and lifting, and lowering the energy consumption of the production line. The layout of the circular screen 1, toothed cutter conveyor 7, circular screen elevator 8, and toothed cutter elevator 6 optimizes the production line space, making the equipment arrangement more compact and thus saving production space.

[0041] In a specific embodiment, the straight sieve unit 4 includes a straight sieve 41 and a straight sieve elevator 42. The straight sieve 41 extends along the first direction D1 and is provided with an inlet 411 and five outlets 412. The inlet 411 is located at the top of the straight sieve 41 and at one end of the straight sieve 41 in the first direction D1, close to the circular sieve 1. The five outlets 412 are arranged sequentially along the extension direction of the straight sieve 41 and are used to output tea powder of five different sizes. Four outlets 412 are located on the side wall of the straight sieve 41, and the other outlet 412 is located on the end wall of the straight sieve 41 in the first direction D1, away from the circular sieve 1. The straight sieve elevator 42 extends along the second direction D2 and is used to lift the tea powder output from the third circular sieve outlet 13 to the inlet 411 of the straight sieve 41.

[0042] The straight sieve 41 separates tea dust into five different sizes through five sieve outlets 412, achieving fine grading of the tea dust and providing a foundation for subsequent targeted utilization. The extension direction of the straight sieve 41 and the straight sieve elevator 42, as well as the arrangement of the inlet sieve 411 and the five outlet sieves 412 on the straight sieve 41, further optimize the production line space and improve the compactness of the equipment layout. It should be noted that the five outlet sieves 412 are arranged from the end of the straight sieve 41 closest to the circular sieve 1 to the end furthest from the straight sieve 41, with the tea dust output from the previous outlet 412 being coarser than that output from the next outlet 412.

[0043] In a specific embodiment, the tea refining production line also includes an electrostatic precipitator 9 and a metal detector 10. The electrostatic precipitator 9 is used to receive the standard tea after air separation by the air separator 3 and adsorb light impurities such as hair and paper scraps. The metal detector 10 is used to receive the standard tea after electrostatic adsorption by the electrostatic precipitator 9 and adsorb metallic impurities. By introducing the electrostatic precipitator 9 and the metal detector 10, this tea refining production line achieves automated removal of light and metallic impurities from the standard tea, further improving the purity and food safety of the standard tea.

[0044] In a specific embodiment, the tea refining production line also includes a vibrating feeder 20, which is used to vibrate and feed the electrostatic unit 9. The air classifier unit 3 includes an air classifier feed elevator 31, an air classifier 32, a cyclone dust collector 33, and an air classifier discharge elevator 34. The air classifier 32 is provided with an air classifier inlet 321, an air inlet 322, and an air classifier outlet 323. The air classifier feed elevator 31 is used to lift the standard tea output from the second circular sieve outlet 12 to the air classifier inlet 321 of the air classifier 32. The air classifier discharge elevator 34 is used to lift the air-classified standard tea output from the air classifier outlet 323 to the vibrating feeder 20. The cyclone dust collector 33 is used to provide airflow to the air inlet 322 to perform air classification on the standard tea in the air classifier 32.

[0045] The air classifier unit 3, through the close cooperation of the air classifier 32 and the cyclone dust collector 33, realizes the automated air classification of standard tea. The introduction of the air classifier feed elevator 31, the air classifier discharge elevator 34 and the vibrating feeder 20 ensures the continuity and smoothness of material flow between the circular screen 1, the air classifier unit 3 and the electrostatic unit 9, and reduces material retention.

[0046] In a specific embodiment, the tea refining production line also includes a bagging elevator 30 and a vibrating screen. The bagging elevator 30 receives the standard tea output from the metal detector 10 and lifts it to the vibrating screen, which is used to sieve the standard tea. The bagging elevator 30 and the vibrating screen work together to sieve the finished product before bagging, further improving the uniformity of the standard tea and the product quality.

[0047] It should be noted that the circular screen 1, straight screen 41, air separator 32, cyclone dust collector 33, toothed cutter 2, electrostatic generator 9, metal detector 10, flat conveyor and various elevators involved in the above embodiments can adopt the existing structures disclosed in the prior art.

[0048] Although the present invention has been described with reference to several typical implementations, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described implementations are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A tea refining production line for refining tea, characterized in that, include: The circular sieve machine has a first circular sieve outlet, a second circular sieve outlet, a third circular sieve outlet, and a feed inlet. The circular sieve machine is used to sieve tea leaves into three specifications according to their size: large long tea, qualified standard tea, and small tea dust. The long tea, standard tea, and tea dust are output sequentially from the first circular sieve outlet, the second circular sieve outlet, and the third circular sieve outlet, respectively. The feed inlet is used to allow tea leaves to enter the circular sieve machine. A toothed cutter has an inlet and an outlet. The inlet is connected to the outlet of the first circular screen. The toothed cutter is used to receive and cut long tea leaves output from the outlet of the first circular screen through the inlet, and the outlet is connected to the inlet. The air classifier unit is used to receive the standard tea output from the outlet of the second circular sieve and to perform air classification on the standard tea; The straight sieve unit is used to receive and continuously convey tea dust output from the outlet of the third circular sieve, and to grade the tea dust according to its size during the continuous conveying process.

2. The tea leaf refining production line according to claim 1, characterized in that, It also includes a feed hopper, a toothed elevator, a toothed conveyor, and a circular screen elevator; The feed hopper is used to feed in pre-processed tea leaves; The toothed elevator is used to lift the long tea leaves output from the outlet of the first circular screen to the inlet of the toothed elevator; The toothed flat conveyor is used to receive and transport the cut long tea leaves output from the outlet of the toothed cutter; The circular screen elevator is used to receive the primary processed tea leaves fed into the feed hopper and the cut long tea leaves conveyed by the toothed flat conveyor, and to lift the primary processed tea leaves and cut long tea leaves to the feed inlet of the circular screen.

3. The tea leaf refining production line according to claim 2, characterized in that, The circular screen and the air classifier are arranged sequentially in the first direction, and the straight screen, the circular screen and the toothed cutter are arranged sequentially in the second direction, with the first direction and the second direction being perpendicular to each other; The feed inlet is located at the top of the circular screen and at the end of the circular screen away from the air classifier unit in the first direction. The first circular screen outlet, the second circular screen outlet, and the third circular screen outlet are all located at the end of the circular screen close to the air classifier unit in the first direction. The first circular screen outlet and the third circular screen outlet are respectively located on two opposite side walls of the circular screen in the second direction. The second circular screen outlet is located on the end wall of the circular screen facing the air classifier unit. The circular screen and the toothed flat conveyor both extend along the first direction, and the circular screen elevator and the toothed elevator both extend along the second direction, and are arranged side by side at intervals in the first direction.

4. The tea leaf refining production line according to claim 3, characterized in that, The straight sieve unit includes a straight sieve machine and a straight sieve elevator. The straight sieve machine extends along the first direction and has an inlet and five outlets. The inlet is located at the top of the straight sieve machine and at the end of the straight sieve machine in the first direction closer to the circular sieve machine. The five outlets are arranged sequentially along the extension direction of the straight sieve machine and are used to output tea powder of five different sizes. Four of the outlets are located on the side wall of the straight sieve machine, and the other outlet is located on the end wall of the straight sieve machine at the end away from the circular sieve machine in the first direction. The straight sieve elevator is used to lift the tea powder output from the outlet of the third circular sieve to the inlet of the straight sieve machine.

5. The tea leaf refining production line according to claim 1, characterized in that, It also includes an electrostatic generator and a metal detector. The electrostatic generator is used to receive the standard tea after it has been air-separated by the air classifier and to adsorb the light impurities therein. The metal detector is used to receive the standard tea after it has been electrostatically adsorbed by the electrostatic generator and to adsorb the metallic impurities therein.

6. The tea leaf refining production line according to claim 5, characterized in that, It also includes a vibrating feeder for vibrating feeding of materials to the electrostatic unit; The air separation unit includes an air separation feed elevator, an air separator, a cyclone dust collector, and an air separation discharge elevator. The air separator is equipped with an air separation inlet, an air inlet, and an air separation outlet. The air separation feed elevator is used to lift the standard tea output from the outlet of the second circular sieve to the air separation inlet of the air separator. The air separation discharge elevator is used to lift the air-separated standard tea output from the air separation outlet to the vibrating feeder. The cyclone dust collector is used to provide airflow to the air inlet to perform air separation on the standard tea inside the air separator.

7. The tea leaf refining production line according to claim 5, characterized in that, It also includes a bagging elevator and a vibrating screen. The bagging elevator is used to receive the standard tea output by the metal detector and lift it to the vibrating screen, which is used to sieve the standard tea.

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