Centrifugal separation device for cold separation liquid and its application in instant tea powder production

Abstract

This invention relates to the field of centrifugal separation technology, specifically to a cold precipitate centrifugal separation device and its application in the production of instant tea powder. The device includes: a base plate and a centrifugal tank fixed to the base plate, with a cover plate hinged to the top of the centrifugal tank; a filter tank rotatably installed inside the centrifugal tank, the outer circumferential wall of the filter tank having multiple circumferentially equidistant filter holes; a centrifugal assembly connected to the filter tank on the base plate; a rotary feeding mechanism disposed on the cover plate for guiding the cold precipitate into the filter tank for centrifugal separation; and a scraping assembly disposed on the cover plate, with a scraper connected to the scraper. The scraping assembly can control the movement of the scraper to break the continuous adhesive surface of the tea polysaccharide-containing filter cake and guide the material away from the filter tank, preventing the material from being re-adsorbed onto the screen due to residual centrifugal force or airflow disturbance.

Description

Technical Field

[0001] This invention relates to the field of centrifugal separation technology, specifically to a centrifugal separation device for cold precipitate and its application in the production of instant tea powder. Background Technology

[0002] Instant tea powder is a solid beverage that can be quickly dissolved in water, made from tea leaves through processes such as water extraction, filtration, concentration, and drying. In the preparation of instant tea powder, in order to control the caffeine content of the final product, a cooling precipitation technique is often used: the tea extract is subjected to low-temperature refrigeration to promote the precipitation of caffeine in the form of crystals, resulting in a solid-liquid mixture of cold precipitation liquid. Then, the caffeine crystals are separated from the liquid phase by centrifugation equipment, and the resulting solid can be used as a caffeine concentrate for subsequent blending.

[0003] Centrifugal separation is a routine unit operation for solid-liquid separation. Currently, flat-plate scraper discharge automatic centrifuges are commonly used equipment in industry to process similar materials. During the discharge stage, the scraper extends into the inner wall of the drum and scrapes off the filter cake trapped on the surface of the filter medium, thereby collecting the solid material.

[0004] However, in actual production, it was found that in addition to caffeine, the cold precipitate also contains water-soluble colloidal components naturally present in tea leaves, such as polysaccharides, pectin, and tea polyphenols. During the low-temperature precipitation process, these substances may partially adhere to the surface of caffeine crystals or fill the interstices between crystals, making the filter cake somewhat sticky. For this type of sticky crystalline filter cake, when using a conventional flat-blade scraper for unloading, the scraper is prone to increased cutting resistance when cutting into the filter cake, and the filter cake may locally curl up or stack at the leading edge of the blade, resulting in discontinuous scraping. At the same time, the sticky material scraped off may partially adhere to the back or side of the scraper, and return to the inner wall of the drum under the residual centrifugal force or airflow disturbance, causing product residue and partial blockage of the filter media. The residual filter cake not only reduces the yield of a single batch of products, but also increases the frequency and difficulty of equipment cleaning, affecting continuous production efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a centrifugal separation device for cold precipitate and its application in the production of instant tea powder, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a cold precipitate centrifugal separation device, comprising: a base plate, and a centrifugal tank fixed on the base plate, the top of the centrifugal tank being hinged to a cover plate; further comprising: a filter tank, rotatably installed inside the centrifugal tank, the outer circumferential wall of the filter tank having a plurality of filter holes equidistantly distributed circumferentially, and a centrifugal assembly connected to the filter tank being disposed on the base plate; a rotary feeding mechanism disposed on the cover plate for guiding the cold precipitate into the filter tank for centrifugal separation; a scraping assembly disposed on the cover plate, the scraping assembly having a scraper connected to it, the scraping assembly being able to control the movement of the scraper to perform a scraping action on the material adhering to the inner wall of the filter tank; the blade of the scraper having a plurality of equally distributed cutting teeth for splitting viscous crystals, and an inclined rod fixed to the scraper for forming an inclined channel and guiding the material to slide downwards in a predetermined direction.

[0007] As a further aspect of the present invention: the centrifugal assembly includes a first motor fixed on the base plate, and a first transmission rod rotatably mounted on the base plate and connected to the output shaft of the first motor.

[0008] As a further embodiment of the present invention: the centrifugal assembly further includes a connecting plate fixed inside the filter tank, a rotating rod fixed on the connecting plate, and a belt connected to the first transmission rod connected to the rotating rod.

[0009] As a further embodiment of the present invention: the rotary feeding mechanism includes a second motor fixed on the cover plate, a second transmission rod rotatably mounted on the cover plate and connected to the output shaft of the second motor, and a centrifugal disc fixed at the end of the second transmission rod.

[0010] As a further embodiment of the present invention: the rotary feeding mechanism further includes a conical cover fixed on the centrifugal disc, the outer circumferential wall of the conical cover having a plurality of through holes distributed equidistantly around the circumference, a flow guide cover sleeved on the conical cover fixed on the cover plate, and a feed pipe connected to the flow guide cover fixed on the cover plate.

[0011] As a further embodiment of the present invention: the scraping assembly includes a controller fixed on the cover plate, a support rod slidably installed inside the controller, and the support rod being fixedly connected to the scraper.

[0012] As a further embodiment of the present invention: the support rod is hollow, a plurality of air blowing pipes are fixed on the scraper at equal intervals, the air blowing pipes are connected to the support rod, and an air supply pipe connected to the support rod is fixed on the cover plate.

[0013] The application of the cold precipitate centrifugal separation device in the production of instant tea powder utilizes the aforementioned cold precipitate centrifugal separation device.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention achieves efficient scraping and smooth discharge of viscous filter cake through the coordinated cooperation of the scraping assembly's cutting teeth, inclined bar guidance, and air blowing assistance. Regarding the scraper teeth, they first contact and cut into the upper edge of the filter cake during the scraping process. By dividing the continuous adhesive layer into discontinuous strips, the teeth effectively disrupt the overall lifting tendency of the filter cake, reducing peeling resistance. Simultaneously, the discontinuous structure of the teeth reduces the actual contact area between the scraper and the filter cake, concentrating the scraping force at the tooth tip, increasing local pressure, and facilitating the cutting into viscous materials. Furthermore, when the scraper contacts the filter cake, the scraping... The blade itself is tilted at multiple angles, so that the blade does not push directly against the direction of rotation of the filter tank, but cuts at an angle, which effectively reduces cutting resistance and prevents the filter cake from being crushed or pushed into a clump. The tilted entry of the blade also provides an outward component force to the crystals, making the crystals similar to being scooped up, which helps to effectively separate the crystals from the inner wall of the filter tank and reduce residue. At the same time, the peeled crystals naturally slide down the inclined surface of the blade and with the help of the inclined channel on the inclined rod, without lingering on the blade surface and causing secondary accumulation. This achieves the effect of scraping and falling at the same time, with smooth material falling, and effectively prevents the material from overflowing to the sides or climbing up along the back of the blade.

[0015] Finally, the air supply pipe delivers clean gas to the air blowing pipe through the hollow support rod. The airflow creates local turbulence at the root of the blade, which can blow off the crystals that have been cut off by the blade but are still attached to the gap between the blades, preventing these crystals from adhering to the filter cake again. It can also form an air curtain on the back of the blade to prevent sticky materials from accumulating and forming scale on the back of the blade. At the same time, the downward blowing direction provides auxiliary power to peel off the crystals, making them slide down faster. Attached Figure Description

[0016] Figure 1 A schematic diagram of an embodiment of a centrifugal separation device for cold precipitate and its application in the production of instant tea powder; Figure 2 A schematic cross-sectional view of the centrifugal separation device for cold precipitation liquid and its application in the production of instant tea powder in one embodiment; Figure 3 for Figure 2 Enlarged structural diagram at point A; Figure 4 A schematic diagram illustrating the connection relationship between the scraping assembly and part of the rotary feeding mechanism in one embodiment of a centrifugal separation device for cold precipitate and its application in the production of instant tea powder; Figure 5 A schematic diagram of the structure of some scraping components and scrapers in one embodiment of a centrifugal separation device for cold precipitate and its application in the production of instant tea powder; Figure 6A schematic diagram of the tilt angle of the scraper in a top view of an embodiment of a centrifugal separation device for cold precipitate and its application in the production of instant tea powder; Figure 7 This is a schematic diagram of the tilt angle of the scraper in a side view of one embodiment of a centrifugal separation device for cold precipitation liquid and its application in the production of instant tea powder.

[0017] In the diagram: 1. Base plate; 2. Centrifuge tank; 201. Discharge pipe; 3. Cover plate; 4. Cylinder; 5. First motor; 6. First transmission rod; 7. Belt; 8. Rotating rod; 9. Connecting plate; 10. Filter tank; 11. Flow guide; 12. Feed pipe; 13. Second motor; 14. Second transmission rod; 15. Centrifuge disc; 16. Conical cover; 1601. Through hole; 17. Controller; 18. Support rod; 19. Scraper; 1901. Blade; 1902. Diagonal rod; 20. Air blowing pipe; 21. Air supply pipe. Detailed Implementation

[0018] 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, and 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.

[0019] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0020] Please see Figures 1-7In this embodiment of the invention, the cold precipitate centrifugal separation device includes: a base plate 1 and a centrifugal tank 2 fixed on the base plate 1, with a cover plate 3 hinged to the top of the centrifugal tank 2; it also includes: a filter tank 10, rotatably installed inside the centrifugal tank 2, the outer circumferential wall of the filter tank 10 having a plurality of filter holes equidistantly distributed circumferentially, and a centrifugal assembly connected to the filter tank 10 being provided on the base plate 1; a rotary feeding mechanism, provided on the cover plate 3, for guiding the cold precipitate into the filter tank 10 for centrifugal separation; and a scraping assembly, provided on the cover plate 3, with a scraper 19 connected to the scraping assembly, the scraping assembly being able to control the movement of the scraper 19 to perform a scraping action on the material adhering to the inner wall of the filter tank 10; the blade of the scraper having a plurality of equally distributed cutting teeth for splitting viscous crystals, and an inclined rod fixed on the scraper for forming an inclined channel and guiding the material to slide down in a predetermined direction.

[0021] Specifically, the preparation of instant tea powder requires the extraction and enrichment of natural caffeine from tea leaves using cold precipitation and a combination of membrane technologies. The preparation of the caffeine concentrate includes: tea leaf grinding: grinding tea leaves to a certain particle size and passing them through a 10-20 mesh sieve; tea leaf mixing: mixing the ground tea leaves with pure water at a specific material-to-liquid ratio and stirring thoroughly; extraction and enrichment: extracting the mixture to enrich caffeine, obtaining a caffeine-rich extract; cold precipitation: refrigerating the extract at low temperatures to precipitate caffeine; centrifugation: separating the precipitated solid, which is a caffeine-rich product. Regarding the preparation of tea concentrate... The process includes tea extraction: tea leaves are extracted with pure water at a specific material-to-water ratio and time; tea infusion centrifugation and filtration: the tea infusion is centrifuged and filtered through a ceramic membrane to obtain tea extract; subsequently, the obtained caffeine concentrate is added to the obtained tea concentrate, and under continuous stirring at 40-60℃, the caffeine concentrate is fully dissolved and evenly dispersed in the tea concentrate to form a homogeneous caffeine-tea concentrate complex; finally, the above caffeine-tea concentrate complex is spray-dried, with the inlet air temperature controlled at 160-190℃ and the outlet air temperature controlled at 80-100℃, and the powder collected at the bottom of the drying tower is obtained as high-caffeine instant tea powder.

[0022] Centrifugation of the cold precipitate is a crucial step in caffeine production. During centrifugation, a cylinder 4 is mounted on the substrate 1. Under the action of the cylinder 4, the cover plate 3 is tightly fitted to the top of the centrifuge tank 2. Through the cooperation of the centrifugal assembly and the rotating feeding mechanism, the filter tank 10 is rotated, and the cold precipitate is guided into the filter tank 10. Under centrifugation, solid-liquid separation occurs, and the filtered product adheres to the inner wall of the filter tank 10, gradually forming a filter cake. When the filter cake thickness reaches a set value, it needs to be scraped. At this time, the scraping assembly moves, driving the scraper 19 to the scraping position. Subsequently, the filter tank 10 rotates slowly, and under the action of the scraper 19, the filter cake is scraped, allowing the separated product to leave the filter tank 10 and be collected. After scraping is completed, the cold precipitate can be centrifuged again.

[0023] Please see Figure 1 , Figure 2 The centrifugal assembly includes a first motor 5 fixed on the base plate 1, a first transmission rod 6 rotatably mounted on the base plate 1 and connected to the output shaft of the first motor 5, and a connecting plate 9 fixed inside the filter tank 10. A rotating rod 8 is fixed on the connecting plate 9, and a belt 7 connected to the first transmission rod 6 is connected to the rotating rod 8.

[0024] Please see Figures 1-4 The rotary feeding mechanism includes a second motor 13 fixed on the cover plate 3. A second transmission rod 14 connected to the output shaft of the second motor 13 is rotatably mounted on the cover plate 3. A centrifugal disc 15 is fixed at the end of the second transmission rod 14. The rotary feeding mechanism also includes a conical cover 16 fixed on the centrifugal disc 15. The outer circumferential wall of the conical cover 16 has a plurality of through holes 1601 distributed equidistantly in a circle. A guide shroud 11 sleeved on the conical cover 16 is fixed on the cover plate 3. A feed pipe 12 connected to the guide shroud 11 is fixed on the cover plate 3.

[0025] In detail, the guide shroud 11 is fitted onto the opening at the upper end of the conical shroud 16, ensuring that the cold precipitate in the feeding cavity formed by the conical shroud 16 and the centrifugal disc 15 can only be discharged through the through hole 1601 under centrifugal action. During centrifugal separation of the cold precipitate, caffeine needs to be extracted at a low temperature. Once caffeine extraction is complete, the first motor 5 can be activated, driving the first transmission rod 6 to rotate. This, in turn, drives the rotating rod 8 via the belt 7. Under the action of the rotating rod 8, the filter tank 10 is controlled to rotate at the required centrifugal speed via the connecting plate 9. Simultaneously, the second motor 13 operates, driving the centrifugal disc 15 via the second transmission rod 14. The filter 10 rotates in the opposite direction to the filter tank 10, causing the conical shroud 16 to rotate synchronously. In this state, the cold precipitate can be conveyed into the feed pipe 12, which passes through the guide shroud 11, allowing the cold precipitate in the feed pipe 12 to enter the feeding cavity formed by the conical shroud 16 and the centrifugal disc 15, and fall onto the centrifugal disc 15. Since the centrifugal disc 15 is continuously rotating and is inclined, under the action of centrifugal force, the cold precipitate is accelerated through the surface of the centrifugal disc 15 and moves along the inclined surface of the centrifugal disc 15 towards the inner wall of the conical shroud 16, and finally passes through multiple through holes 16 evenly distributed in a circle on the outer circumference of the conical shroud 16. 01 is thrown out. Due to the opposite rotation direction of the centrifugal disc 15 and the filter tank 10, the cold precipitate impacts the inner wall of the filter tank 10 at a high relative speed. The highest point of the cold precipitate thrown out is below the top of the filter tank 10, and the lowest point is above the bottom of the filter tank 10. At the same time, the filter tank 10 is in a state of continuous high-speed rotation driven by the first motor 5. Therefore, the cold precipitate thrown out from the conical cover 16 will evenly impact the entire circumferential direction of the inner wall of the filter tank 10, forming a feed area evenly distributed along the axial direction of the filter tank 10. Under the action of centrifugal force, the liquid in the cold precipitate is thrown out through the filter holes on the outer circumference of the filter tank 10 and enters the centrifugal tank 2. The liquid is discharged and collected through the discharge pipe 201 installed at the bottom of the centrifuge tank 2 in the discharge chamber formed between the filter tank 10 and the centrifuge tank 2; while the caffeine crystals in the cold precipitate are trapped on the inner wall of the filter tank 10 and gradually form a filter cake; as the solid-liquid separation process continues, the thickness of the filter cake on the inner wall of the filter tank 10 gradually increases. When the filter cake thickness reaches the set value, it indicates that the filtration efficiency of the filter tank 10 has begun to decrease and the filter cake needs to be peeled off. At this time, the cold precipitate is stopped from being fed to the feed pipe 12, the second motor 13 is stopped, the centrifuge disc 15 stops rotating, and the centrifuge tank 10 is controlled to rotate slowly in preparation for entering the scraping process.

[0026] Please see Figure 2 , Figure 4 , Figure 5The scraping assembly includes a controller 17 fixed on the cover plate 3. A support rod 18 is slidably installed inside the controller 17. The support rod 18 is fixedly connected to the scraper 19. The support rod 18 is hollow. A plurality of air blowing pipes 20 are fixed on the scraper 19 and are evenly distributed. The air blowing pipes 20 are connected to the support rod 18. An air supply pipe 21 connected to the support rod 18 is fixed on the cover plate 3.

[0027] Furthermore, the controller 17 is composed of a drive motor and an electromagnet. A keyway is formed on the rotating shaft of the controller 17, and a key is fixed on the support rod 18. The cooperation between the key and the keyway allows the support rod 18 to rotate synchronously with the rotating shaft of the controller 17 and to slide axially along the shaft. This is an application of existing technology and will not be elaborated upon in this application; please refer to... Figure 6 , Figure 7 The support rod 18 is composed of two rod sections, one vertically distributed and the other horizontally distributed. The scraper 19 is inclined at multiple angles. In one inclined angle, the angle between the direction of the scraper 19 and the tangential direction of the filter tank 10 is α, with the angle α between 30° and 60°, allowing the scraper 19 to scrape the filter cake in an inclined cutting direction. In another inclined angle, the angle between the scraper 19 and the axial section of the filter tank 10 is β, with the angle β between 30° and 60°, allowing the scraper 19 to provide a downward force on the product when scraping the filter cake, thereby guiding the product away from the filter tank 10. Please refer to [link to relevant documentation]. Figure 7The inclined rod 1902 is set at an angle, with its two ends defined as points B and C respectively. Taking the blade as the reference plane, point B of the inclined rod 1902 is close to the upper edge of the scraper 19, and point C is close to the lower root of the scraper 19. The air blowing pipe 20 is located on the back of the working surface of the scraper 19, and its air blowing direction is inclined downward and points towards the edge of the scraper 19. The main component of the cold precipitate is caffeine, and it usually also contains other substances such as polysaccharides and tea polyphenols. When centrifuging the cold precipitate, it needs to be cooled and allowed to stand first to allow the caffeine to precipitate. Then, centrifugation is performed. The caffeine will adhere to the inner wall of the filter tank 10 in a crystalline state, while the polysaccharides and tea polyphenols will be coated. On the surface of caffeine crystals, the separated product is in a viscous crystalline state. When the scraper 19 scrapes the filter cake, the viscous crystals may accumulate at the leading edge of the blade and be re-adsorbed onto the screen under the residual centrifugal force and airflow disturbance, resulting in incomplete scraping and subsequent product loss and chamber contamination. During centrifugation, the controller 17 controls the scraper 19 to detach from the filter tank 10 via the support rod 18. When centrifugation is complete and the filter cake reaches the set thickness, scraping is required. At this time, the controller 17 controls the scraper 19 to descend into the filter tank 10 via the support rod 18 and rotates it at a certain angle so that the scraper 19 adheres to the surface of the filter cake. In this state, the scraper 19 can contact the filter cake with an inclined cutting posture, providing a downward force to the scraped crystals. This means the scraper 19's blade doesn't push directly against the rotation direction of the filter tank 10, but rather cuts at an angle, effectively reducing cutting resistance and preventing the filter cake from being crushed or clumped together. The inclined cutting also provides an outward force to the crystals, making them appear as if they are being scooped up, helping to completely separate the crystals from the inner wall of the filter tank 10 and reducing residue. Simultaneously, the detached crystals naturally slide downwards along the inclined blade, preventing secondary accumulation above the blade surface, thus achieving a smooth scraping and falling effect. Subsequently, the filter... As the tank 10 rotates slowly, the multiple teeth 1901 on the blade of the scraper 19 first contact and cut into the upper edge of the filter cake. Due to the polysaccharides and tea polyphenols in the cold precipitate, the filter cake is in a sticky crystalline state. A straight blade edge can easily cause the filter cake to roll up or stack along the leading edge of the blade. However, the teeth 1901 effectively break the overall lifting of the filter cake by dividing the continuous adhesive layer into discontinuous strips, thus reducing the peeling resistance. At the same time, the inclined bar 1902 can guide and constrain the movement direction of the sticky crystals, so that the peeled sticky crystals move along the inclined channel formed by the inclined bar 1902, preventing the material from overflowing to both sides or climbing up along the back of the blade, and ensuring that the product can smoothly slide down and detach from the inner wall of the filter tank 10.During the scraping process, the air supply pipe 21 continuously delivers clean gas to each air blowing pipe 20 through the hollow support rod 18. The air blowing pipe 20 is located on the back side of the working surface of the scraper 19, and its air outlet direction is inclined downward and points towards the root of the cutting teeth 1901. Under the action of airflow, it can not only form turbulence behind the blade to prevent sticky materials from accumulating and forming scale on the back of the blade body, and provide a blowing force to peel crystals downward, but also blow off the crystals embedded in the gaps of the cutting teeth 1901, preventing these crystals from adhering to the filter cake again. As the scraper 19 moves in the vertical direction and the yaw angle is adjusted, the filter cake can be gradually scraped off completely. After scraping is completed, the controller 17 controls the scraper 19 to detach from the filter tank 10 again through the support rod 18. At this time, feeding and centrifugal separation can be performed again.

[0028] By coordinating the scraper 19, the inclined bar 1902, and the air blower, the scraper 1901 can quickly guide the crystals to fall through the inclined channel after the viscous crystals are separated, thus ensuring the orderly discharge of the material. At the same time, the air blower can disperse the residual particles of the scraper 1901, preventing the scraper 1901 from being stuck by the viscous material and losing its cutting ability. In this way, when processing cold precipitate containing viscous substances such as polysaccharides and tea polyphenols, the scraper 19 will not be encapsulated by the gelatinous crystals and become ineffective, shortening the scraping time and improving the crystal harvest rate.

[0029] The application of the cold precipitate centrifugal separation device in the production of instant tea powder utilizes the aforementioned cold precipitate centrifugal separation device.

[0030] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A centrifugal separation device for cold precipitation liquid, comprising: The system comprises: a substrate and a centrifuge tank fixed on the substrate, the centrifuge tank having a cover plate hinged to its top; characterized in that it further comprises: a filter tank rotatably installed inside the centrifuge tank, the outer circumferential wall of the filter tank having a plurality of filter holes equidistantly distributed circumferentially, and a centrifugal assembly connected to the filter tank being disposed on the substrate; a rotary feeding mechanism disposed on the cover plate for guiding the cold precipitate into the filter tank for centrifugal separation; and a scraping assembly disposed on the cover plate, the scraping assembly having a scraper connected to it, the scraping assembly being able to control the movement of the scraper to perform a scraping action on the material adhering to the inner wall of the filter tank; the scraper having a plurality of equally distributed cutting teeth on its blade for separating viscous crystals, and a slanted rod fixed to the scraper for forming an oblique channel and guiding the material to slide downwards in a predetermined direction.

2. The centrifugal separation device for cold precipitation liquid according to claim 1, characterized in that, The centrifugal assembly includes a first motor fixed on the base plate, and a first transmission rod rotatably mounted on the base plate and connected to the output shaft of the first motor.

3. The centrifugal separation device for cold precipitation liquid according to claim 2, characterized in that, The centrifugal assembly also includes a connecting plate fixed inside the filter tank, a rotating rod fixed on the connecting plate, and a belt connected to the first transmission rod connected to the rotating rod.

4. The centrifugal separation device for cold precipitation liquid according to claim 1, characterized in that, The rotary feeding mechanism includes a second motor fixed on the cover plate, a second transmission rod rotatably mounted on the cover plate and connected to the output shaft of the second motor, and a centrifugal disc fixed at the end of the second transmission rod.

5. The centrifugal separation device for cold precipitate according to claim 4, characterized in that, The rotary feeding mechanism also includes a conical cover fixed on the centrifugal disc. The outer circumferential wall of the conical cover has a plurality of through holes distributed equidistantly around the circumference. A flow guide cover fitted on the conical cover is fixed on the cover plate, and a feed pipe connected to the flow guide cover is fixed on the cover plate.

6. The centrifugal separation device for cold precipitation liquid according to claim 1, characterized in that, The scraping assembly includes a controller fixed to the cover plate, and a support rod is slidably installed inside the controller. The support rod is fixedly connected to the scraper.

7. The centrifugal separation device for cold precipitate according to claim 6, characterized in that, The support rod is hollow, and multiple air blowing pipes are fixed on the scraper at equal intervals. The air blowing pipes are connected to the support rod, and an air supply pipe connected to the support rod is fixed on the cover plate.

8. The application of a cold precipitate centrifugal separation device in the production of instant tea powder, characterized in that, The centrifugal separation device described in any one of claims 1-7 is used.

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