Natural tea aroma component extraction and recovery equipment and extraction process thereof

Abstract

The invention relates to the technical field of extraction and recovery, in particular to natural tea aroma component extraction and recovery equipment and an extraction process thereof.The natural tea aroma component extraction and recovery equipment comprises an extraction tank, a gas temperature control box, a stirring and cleaning mechanism, a motor and a three-phase separation tank, a hinge frame is rotationally hinged to the outer wall of the extraction tank, and a tank cover is fixedly connected to the outer wall of the hinge frame; the gas temperature control box is arranged on the outer side of the extraction tank, and a gas inlet mechanism is arranged between the extraction tank and the gas temperature control box. The stirring and cleaning mechanism is used for effectively combining the functions of cleaning solid impurities remaining in tea leaves and stirring, the functions of stirring and cleaning are independent and combined by adjusting linkage between a rotating rod and a ball screw, energy is saved, the tank cover does not need to be manually opened for cleaning, the cleaning difficulty is reduced, and the cleaning efficiency is improved; impurity residues are prevented from interfering subsequent product preparation and production, and economic benefits of factories are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of extraction recovery machines, in particular to natural tea aroma component extraction recovery equipment and an extraction process thereof. Background Art

[0002] Aroma analysis and determination has long been a crucial topic in tea research, attracting extensive research efforts by tea researchers both domestically and internationally. To date, over 700 aroma compounds have been isolated from various teas, encompassing over ten major categories of compounds, including alcohols, aldehydes, ketones, vinegar, acids, and nitrogen. The first step in aroma research is extraction and separation, which directly impacts the qualitative and quantitative analysis of aroma. Aroma compounds in tea are present in low concentrations, complex compositions, and are volatile and unstable. During the extraction process, influenced by external conditions, they are susceptible to complex chemical reactions such as oxidation, condensation, polymerization, and group transfer. This results in the extracted essential oils failing to fully reflect the aroma characteristics of the tea itself, hindering accurate assessment of tea quality. Numerous methods for aroma extraction and separation have been investigated, primarily including atmospheric steam distillation with simultaneous extraction (SDE), vacuum distillation extraction (VDE), headspace adsorption (HAS), supercritical carbon dioxide extraction, vacuum steam distillation (SDRP), and column adsorption (TLA).

[0003] The existing supercritical carbon dioxide extraction method requires controlling the pressure and temperature of carbon dioxide to a supercritical fluid state to contact the aroma molecules. Slight stirring makes the contact more complete, effectively preventing the oxidation and escape of heat-sensitive components, and effectively protecting the aroma components of the tea from damage. However, after production, due to the closed environment of the device, after the extraction is completed, some tea impurities may be retained and adhered to the curved inner bottom wall of the extraction tank, resulting in the retention of some solid debris, which is more troublesome to clean. In addition, general extraction only distinguishes between the required substances and impurities in the fluid, and the gas is directly discharged, resulting in a certain amount of resource waste. Summary of the Invention

[0004] In order to solve the problems of troublesome cleaning of residual impurities and waste of gas resources after existing supercritical fluid extraction, the present invention provides a natural tea aroma component extraction and recovery equipment and an extraction process thereof.

[0005] The present invention provides a natural tea aroma component extraction and recovery device and its extraction process using the following technical solutions: A natural tea aroma component extraction and recovery device, comprising: An extraction tank, the outer wall of which is rotatably hinged to a hinged frame, and the outer wall of the hinged frame is fixedly connected to a tank cover; A gas temperature control box is provided outside the extraction tank, and an air intake mechanism is provided between the extraction tank and the gas temperature control box; A stirring and cleaning mechanism is provided on the inner side of the tank cover, and comprises a rotating rod, a stirring blade and a ball screw. The rotating rod and the ball screw are both rotatably connected to the tank cover, and a linkage adjustment mechanism is provided between the rotating rod and the ball screw. The stirring blade is fixedly connected to the outer bottom of the rotating rod, and a stop frame is provided on the outer sliding sleeve of the ball screw. A plurality of curved ribs are hingedly connected to the circumferential array of the outer wall of the stop frame. Through-hole folding plates are connected between the curved ribs. A main limit rod corresponding to one of the curved ribs is fixedly connected to the inner wall of the tank cover; a motor, which is fixedly connected to the articulated frame, and a first pulley set is connected between the output shaft of the motor and the rotating rod; A three-phase separation tank connected between the extraction tank and the air intake mechanism; A protective shell is fixedly connected to the inner wall of the tank cover, and the linkage adjustment mechanism is arranged in the protective shell.

[0006] By adopting the above technical solution, by effectively combining the cleaning of solid impurities remaining in the tea leaves with the stirring function, and by adjusting the linkage between the rotating rod and the ball screw, the independence and combination of the stirring and cleaning functions are realized, energy is saved and there is no need to manually open the can lid for cleaning, which reduces the difficulty of cleaning and improves the cleaning efficiency. The gas is separated and refluxed for reuse through the three-phase separation tank, thereby improving the utilization rate of resources.

[0007] Optionally, the tank cover is integrally fixed with a plurality of connecting flanges.

[0008] By adopting the above technical solution, it is convenient to add other protective gases.

[0009] Optionally, the air intake mechanism includes a gas cylinder and an intermediate storage tank, the gas cylinder and the intermediate storage tank are connected by a pipeline, an air intake pipe is detachably connected between the intermediate storage tank and one of the connecting flanges, and an exhaust fan is provided at the top of the gas temperature control box.

[0010] By adopting the above technical solution, the gas temperature in the gas cylinder and the intermediate storage tank is controlled, which facilitates the carbon dioxide to enter the extraction tank and quickly approach the supercritical fluid temperature, thereby improving work efficiency.

[0011] Optionally, the air inlet pipe is fixedly connected to a limiting tube on an outer wall at the same height as the main limiting rod, and is correspondingly arranged on the top side of one of the curved ribs.

[0012] By adopting the above technical solution, the bent ribs are assisted by the limiting tubes to form multi-point obstructions, thereby ensuring the contraction of the bent ribs.

[0013] Optionally, the baffle is a cylindrical structure with a through groove in the middle hollowed out to accommodate the movement of the stirring blade, and a plurality of through holes are provided through the outer wall of the baffle.

[0014] By adopting the above technical solution, the rotation of the stirring blade is facilitated, and the up and down movement of the baffle frame is facilitated.

[0015] Optionally, a connecting pipe is connected between the three-phase separation tank and the extraction tank, and a primary separation net for separating impurities and a secondary separation net for separating aroma components are provided in the three-phase separation tank. The primary separation net is close to the connecting pipe, and a reflux pipe and a serpentine coil pipe are connected between the three-phase separation tank and the gas cylinder. The serpentine coil pipe is arranged on the inner side of the gas temperature control box, and the serpentine coil pipe is connected to the gas cylinder.

[0016] By adopting the above technical solution, the aroma components, impurities and gases are separated and collected accordingly, thereby facilitating the recycling of the gases.

[0017] Optionally, a hydraulic rod is movably connected between the articulated frame and the outer wall of the extraction tank.

[0018] By adopting the above technical solution, the hydraulic rod controls the rotation of the articulated frame, thereby controlling the opening and closing of the tank cover.

[0019] Optionally, the bottom end of the extraction tank is fixedly connected to a discharge port, and a discharge valve is detachably connected to the discharge port.

[0020] By adopting the above technical solution, it is convenient to clean up and discharge solid debris after the extraction is completed.

[0021] Optionally, hard bristles are fixedly connected to the edge of the through-hole folded plate, and the bristles are in contact with the inner bottom wall of the extraction tank.

[0022] By adopting the above technical solution, the bristles scrape off the residues, thereby improving the cleaning quality.

[0023] Optionally, the linkage adjustment mechanism includes a driven gear, a driving gear and a second pulley group, the driven gear is coaxially fixedly connected to the ball screw, the driving gear is rotatably connected to the inner wall of the protective shell, the rotating rod passes through the driving gear, and the second pulley group is connected between the two ball screws, and a plurality of linkage tooth grooves are provided in the center of the driving gear, the top of the rotating rod is rotatably connected to the screw, and the bottom end of the screw is movably sleeved with a disc, the bottom end of the screw is fixedly connected to a connecting rod that is slidably connected to the inner wall of the rotating rod, the bottom end of the connecting rod is fixedly connected to a pushing block, and the inside of the rotating rod is slidably connected to a slider adapted to the linkage tooth groove, the pushing block and the slider are provided with oblique surfaces abutting each other, the bottom end of the slider is fixedly connected to a limiting block, and a reset spring is fixedly connected between the limiting block and the inner wall of the rotating rod.

[0024] By adopting the above technical solution, the slider is engaged with the center linkage tooth groove of the driving gear to achieve synchronous rotation of the driving gear and the rotating rod, thereby achieving linkage between the rotating rod and the ball screw through the engagement between the driving gear and the driven gear. Conversely, when the slider is disengaged from the linkage tooth groove, the rotating rod is released from the linkage with the ball screw. It has high adjustability and is applicable to more scenarios. In addition, the mechanism has a simple structure and is easy to use.

[0025] Optionally, an extraction process for a natural tea aroma component extraction and recovery device comprises the following steps: Step 1: Add the raw materials. Add the tea leaves that need to be prepared with aroma into the extraction tank. The tea leaves must have been thoroughly cleaned, dried, and crushed before being added. Step 2: Extraction: The gas medium in the gas cylinder is passed into the extraction tank through the intermediate storage tank. At this time, the curved umbrella ribs are in an open state, changing the pressure and temperature in the extraction tank, so that the gas medium contacts with the tea aroma components to form a supercritical fluid. The gas medium enters the three-phase separation tank through the connecting pipe, and is purified and separated by the primary and secondary separation nets in the three-phase separation tank to extract the aroma components. Step 3: Gas reflux utilization: the separated gas enters the gas cylinder again through the reflux pipe and the serpentine coil pipe for secondary utilization; Step 4: Clean, control the rotating rod and the ball screw to work in conjunction, so that the rotating rod drives the ball screw to rotate, so that the baffle frame moves up, and the bent umbrella ribs are blocked by the main limit rod and the limit tube, completing the contraction of the through-hole folding plate, and scraping any remaining adhered tea leaves into the discharge pipe for discharge.

[0026] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The stirring and cleaning mechanism is used to effectively combine the cleaning of solid impurities remaining in the tea leaves with the stirring function. By adjusting the linkage between the rotating rod and the ball screw, the stirring and cleaning functions can be independent and combined, saving energy and eliminating the need to manually open the can lid for cleaning, reducing the difficulty of cleaning, improving cleaning efficiency, and preventing impurities from interfering with the preparation and production of subsequent products, thereby ensuring the economic benefits of the factory. 2. The gas is separated and refluxed through a three-phase separation tank for reuse, which improves resource utilization, saves energy and is environmentally friendly, and meets people's needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of a natural tea aroma component extraction and recovery device in this embodiment.

[0028] Figure 2 It is a front view structural schematic diagram of a natural tea aroma component extraction and recovery device in this embodiment.

[0029] Figure 3It is a schematic cross-sectional view of a natural tea aroma component extraction and recovery device in this embodiment.

[0030] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle.

[0031] Figure 5 yes Figure 4 Enlarged structural diagram at point B in the middle.

[0032] Figure 6 This is a schematic diagram of the expanded structure of the stirring and cleaning mechanism of a natural tea aroma component extraction and recovery device in this embodiment.

[0033] Figure 7 This is a schematic diagram of a partial cross-sectional structure inside a protective shell of a natural tea aroma component extraction and recovery device in this embodiment.

[0034] Figure 8 This is a partial structural diagram of the linkage adjustment mechanism of a natural tea aroma component extraction and recovery device in this embodiment.

[0035] Figure 9 This is a schematic diagram of the driving gear structure of a natural tea aroma component extraction and recovery device in this embodiment.

[0036] Description of reference numerals: 1. Extraction tank; 11. Tank cover; 12. Connecting flange; 13. Articulated frame; 14. Hydraulic lever; 15. Discharge valve; 2. Gas temperature control box; 21. Gas cylinder; 22. Intermediate storage tank; 23. Inlet pipe; 231. Limiting pipe; 24. Exhaust fan; 3. Mixing and cleaning mechanism; 31. Rotating rod; 32. First pulley assembly; 33. Mixing blade; 34. Ball screw; 35. Stop frame; 36. Bending rib; 37. Pass Perforated plate; 38. Brush; 39. Main limit rod; 4. Motor; 5. Three-phase separation tank; 51. Primary separation net; 52. Secondary separation net; 53. Reflux pipe; 54. Connecting pipe; 55. Serpentine coil pipe; 6. Protective shell; 61. Driven gear; 62. Driving gear; 63. Second pulley set; 64. Screw; 65. Connecting rod; 66. Push block; 67. Slider; 68. Limit block; 69. Return spring. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1 - Figure 9 The present invention is described in further detail.

[0038] The embodiment of the invention discloses a natural tea aroma component extraction and recovery device and an extraction process thereof.

[0039] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0040] Reference Figure 1 - Figure 9 , a natural tea aroma component extraction and recovery device, comprising: The extraction tank 1 has an outer wall rotatably hinged with an articulated frame 13, and the outer wall of the articulated frame 13 is fixedly connected to the tank cover 11. A heater and a pressure controller are installed in the extraction tank 1. The prior art will not be described in detail. A gas temperature control box 2 is provided outside the extraction tank 1, and an air intake mechanism is provided between the extraction tank 1 and the gas temperature control box 2; The stirring and cleaning mechanism 3 is arranged on the inner side of the tank cover 11. The stirring and cleaning mechanism 3 includes a rotating rod 31, a stirring blade 33 and a ball screw 34. The rotating rod 31 and the ball screw 34 are both rotatably connected to the tank cover 11. A linkage adjustment mechanism is provided between the rotating rod 31 and the ball screw 34 to control the linkage or release of the linkage between the rotating rod 31 and the ball screw 34. The stirring blade 33 is fixedly connected to the outer bottom of the rotating rod 31. A stop frame 35 is provided on the outer sliding sleeve of the ball screw 34. A plurality of curved umbrella ribs 36 are hingedly connected to the outer wall of the stop frame 35 in a circumferential array. The curved umbrella ribs 36 are connected with through-hole folding plates 37. A main limit rod 39 corresponding to one of the curved umbrella ribs 36 is fixedly connected to the inner wall of the tank cover 11; The motor 4 is fixedly connected to the hinge frame 13, and a first pulley set 32 ​​is connected between the output shaft of the motor and the rotating rod 31; A three-phase separation tank 5, which is connected between the extraction tank 1 and the air intake mechanism; The protective shell 6 is fixedly connected to the inner wall of the tank cover 11 , and the linkage adjustment mechanism is arranged in the protective shell 6 .

[0041] Specifically, during the extraction, tea raw materials are added to the extraction tank 1, the tank cover 11 is tightly closed, and the gas medium in the gas cylinder 21, for example, carbon dioxide, is passed into the extraction tank 1 through the intermediate storage tank 22. At this time, each curved umbrella rib 36 is in an open state, and the solid raw material is covered on the inner side of the through-hole folding plate 37. The pressure controller and heater in the extraction tank 1 are used to change the pressure and temperature in the extraction tank 1, so that the carbon dioxide reaches the critical temperature Tc (31.3°C) and the critical pressure Pc (7.15MPa), and the supercritical fluid and the tea aroma are separated. The gas components come into contact with each other and enter the three-phase separation tank 5 from the connecting pipe 54. The three-phase separation is carried out in the three-phase separation tank 5 to extract the aroma components. The solid impurities remaining in the tea leaves are effectively combined with the stirring function. The linkage between the rotating rod 31 and the ball screw 34 is adjusted by the linkage adjustment mechanism to realize the independence and combination of the stirring and cleaning functions, saving energy and eliminating the need to manually open the tank cover 11 for cleaning, reducing the difficulty of cleaning, improving the cleaning efficiency, and separating the gas through the three-phase separation tank 5 to reflux for reuse, thereby improving resource utilization.

[0042] Reference Figure 1 Specifically, in the embodiment of the present invention, a plurality of connecting flanges 12 are integrally fixedly connected to the tank cover 11 .

[0043] In the embodiment of the present invention, it is convenient to add other protective gases during operation.

[0044] Reference Figure 1 、 Figure 3 and Figure 4 Specifically, in the embodiment of the present invention, the air intake mechanism includes a gas cylinder 21 and an intermediate storage tank 22. The gas cylinder 21 and the intermediate storage tank 22 are connected by a pipeline. An air intake pipe 23 is detachably connected between the intermediate storage tank 22 and one of the connecting flanges 12. An exhaust fan 24 is provided at the top of the gas temperature control box 2. The air intake pipe 23 is fixedly connected to the outer wall at the same height as the main limit rod 39 with a limit tube 231, and is correspondingly arranged on the top side of one of the curved ribs 36.

[0045] In the embodiment of the present invention, the temperature of the gas in the gas cylinder 21 and the intermediate storage tank 22 is controlled to facilitate the entry of carbon dioxide into the extraction tank 1 and quickly approach the supercritical fluid temperature, thereby improving work efficiency. The curved ribs 36 are assisted by the limiting tubes 231 and cooperate with the main limiting rods 39 to form multi-point obstructions to ensure the contraction of the curved ribs 36.

[0046] Reference Figure 1 - Figure 6Specifically, in the embodiment of the present invention, a connecting pipe 54 is connected between the three-phase separation tank 5 and the extraction tank 1. A primary separation net 51 for separating impurities and a secondary separation net 52 for separating aroma components are provided in the three-phase separation tank 5. The primary separation net 51 is close to the connecting pipe 54. A reflux pipe 53 and a serpentine coil pipe 55 are connected between the three-phase separation tank 5 and the gas cylinder 21. The serpentine coil pipe 55 is provided on the inner side of the gas temperature control box 2, and the serpentine coil pipe 55 is connected to the gas cylinder 21.

[0047] In the embodiment of the present invention, during use, the aroma components, impurities and gases are separated and collected accordingly, thereby facilitating the recycling of the gases.

[0048] Reference Figure 1 Specifically, in the embodiment of the present invention, a hydraulic rod 14 is movably connected between the hinged frame 13 and the outer wall of the extraction tank 1, and the baffle frame 35 is a cylindrical structure with a through groove in the middle for accommodating the movement of the stirring blade 33. A plurality of through holes are provided through the outer wall of the baffle frame 35.

[0049] In the embodiment of the present invention, the through hole facilitates the circulation of the fluid during the stirring process, and the hydraulic rod 14 controls the rotation of the hinge frame 13 to control the opening and closing of the tank cover 11.

[0050] Reference Figure 5 Specifically, in the embodiment of the present invention, the bottom end of the extraction tank 1 is fixedly connected to a discharge port, and a discharge valve 15 is detachably connected to the discharge port. The edge of the through-hole folding plate 37 is fixedly connected to hard bristles 38, and the bristles 38 are in contact with the inner bottom wall of the extraction tank 1.

[0051] In the embodiment of the present invention, the bristles 38 scrape off the residues to improve the cleaning quality.

[0052] Reference Figure 7 - Figure 9 The second pulley set 63 is connected to the inner wall of the protective shell 6, and the driven gear 61 is coaxially fixedly connected to the ball screw 34. The driving gear 62 is rotatably connected to the inner wall of the protective shell 6. The rotating rod 31 passes through the driving gear 62, and the second pulley set 63 is connected between the two ball screws 34. A plurality of linkage tooth grooves are provided in the center of the driving gear 62. A screw 64 is rotatably connected to the top of the rotating rod 31, and a disc is movably sleeved on the bottom end of the screw 64. The bottom end of the disc is fixedly connected to a connecting rod 65 that is slidably connected to the inner wall of the rotating rod 31. The bottom end of the connecting rod 65 is fixedly connected to a pushing block 66. The inside of the rotating rod 31 is slidably connected to a slider 67 that is adapted to the linkage tooth groove. The pushing block 66 and the slider 67 are provided with oblique surfaces that abut each other. The bottom end of the slider 67 is fixedly connected to a limiting block 68. A return spring 69 is fixedly connected between the limiting block 68 and the inner wall of the rotating rod 31.

[0053] When the rotating rod 31 is in motion, the drive gear 62 is engaged with the driven gear 61, and the linkage between the rotating rod 31 and the ball screw 34 is achieved. At this time, the return spring 69 is in a compressed state. On the contrary, when the rotating rod 31 needs to move alone, the screw 64 is rotated in the opposite direction. Under the action of the return spring 69, the slider 67 is retracted into the rotating rod 31 and disengaged from the drive gear 62.

[0054] Specifically, in an embodiment of the present invention, an extraction process of a natural tea aroma component extraction and recovery device includes the following steps: Step 1: Add raw materials. Add the tea raw materials that need to be prepared with aroma into the extraction tank 1. The tea raw materials have been thoroughly cleaned, dried, crushed, and other processing steps before being added; Step 2: Extraction: The gaseous medium in the gas cylinder 21 is passed into the extraction tank 1 through the intermediate storage tank 22. At this time, the curved umbrella ribs 36 are in the open state, changing the pressure and temperature in the extraction tank 1, so that the gaseous medium contacts with the tea aroma components to form a supercritical fluid. The gaseous medium then enters the three-phase separation tank 5 through the connecting pipe 54, and is purified and separated by the primary separation net 51 and the secondary separation net 52 in the three-phase separation tank 5, thereby extracting the aroma components. Step 3: Gas reflux utilization: the separated gas re-enters the gas cylinder 21 through the reflux pipe 53 and the serpentine coil pipe 55 for secondary utilization; Step 4: Cleaning, control the rotating rod 31 and the ball screw 34 to work in conjunction, so that the rotating rod 31 drives the ball screw 34 to rotate, so that the baffle 35 moves up, and the bent umbrella rib 36 encounters the main limit rod 39 and the limit tube 231 to complete the contraction of the through-hole folding plate 37, and the tea leaves that may remain adhered are scraped into the discharge pipe for discharge.

[0055] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A natural tea aroma component extraction and recovery device, characterized in that: include: An extraction tank (1) has an outer wall rotatably hinged with a hinged frame (13), and the outer wall of the hinged frame (13) is fixedly connected to a tank cover (11); A gas temperature control box (2) is arranged outside the extraction tank (1), and an air intake mechanism is provided between the extraction tank (1) and the gas temperature control box (2); A stirring and cleaning mechanism (3) is arranged on the inner side of the tank cover (11), the stirring and cleaning mechanism (3) comprises a rotating rod (31), a stirring blade (33) and a ball screw (34), the rotating rod (31) and the ball screw (34) are both rotatably connected to the tank cover (11), a linkage adjustment mechanism is provided between the rotating rod (31) and the ball screw (34), the stirring blade (33) is fixedly connected to the outer bottom of the rotating rod (31), the outer sliding sleeve of the ball screw (34) is provided with a retaining frame (35), the outer wall of the retaining frame (35) is hinged with a plurality of curved umbrella ribs (36) in a circumferential array, the curved umbrella ribs (36) are connected with through-hole folding plates (37), and the inner wall of the tank cover (11) is fixedly connected with a main limit rod (39) corresponding to one of the curved umbrella ribs (36); A motor (4) is fixedly connected to the hinge frame (13), and a first pulley assembly (32) is connected between the output shaft of the motor and the rotating rod (31); A three-phase separation tank (5) connected between the extraction tank (1) and the air intake mechanism; A protective shell (6) is fixedly connected to the inner wall of the tank cover (11), and the linkage adjustment mechanism is arranged in the protective shell (6).

2. The natural tea aroma component extraction and recovery equipment according to claim 1, characterized in that: The tank cover (11) is integrally fixedly connected with a plurality of connecting flanges (12).

3. The natural tea aroma component extraction and recovery equipment according to claim 2, characterized in that: The air intake mechanism comprises a gas cylinder (21) and an intermediate storage tank (22), the gas cylinder (21) and the intermediate storage tank (22) are connected via a pipeline, an air intake pipe (23) is detachably connected between the intermediate storage tank (22) and one of the connecting flanges (12), an exhaust fan (24) is provided at the top of the gas temperature control box (2), a limiting pipe (231) is fixedly connected to the outer wall of the air intake pipe (23) at the same height as the main limiting rod (39), and is correspondingly provided on the top side of one of the curved ribs (36).

4. The natural tea aroma component extraction and recovery equipment according to claim 1, characterized in that: The baffle (35) is a cylindrical structure, with a through slot in the middle being hollowed out to accommodate the movement of the stirring blade (33), and a plurality of through holes are provided through the outer wall of the baffle (35).

5. The natural tea aroma component extraction and recovery equipment according to claim 1, characterized in that: A connecting pipe (54) is connected between the three-phase separation tank (5) and the extraction tank (1). A primary separation net (51) for separating impurities and a secondary separation net (52) for separating aroma components are provided in the three-phase separation tank (5). The primary separation net (51) is close to the connecting pipe (54). A reflux pipe (53) and a serpentine coil pipe (55) are connected between the three-phase separation tank (5) and the gas cylinder (21). The serpentine coil pipe (55) is provided inside the gas temperature control box (2) and is in communication with the gas cylinder (21).

6. The natural tea aroma component extraction and recovery equipment according to claim 1, characterized in that: A hydraulic rod (14) is movably connected between the hinged frame (13) and the outer wall of the extraction tank (1).

7. The natural tea aroma component extraction and recovery equipment according to claim 1, characterized in that: The bottom end of the extraction tank (1) is fixedly connected to a discharge port, and a discharge valve (15) is detachably connected to the discharge port.

8. The natural tea aroma component extraction and recovery equipment according to claim 1, characterized in that: The edge of the through-hole folded plate (37) is fixedly connected with hard bristles (38), and the bristles (38) are in contact with the inner bottom wall of the extraction tank (1).

9. The natural tea aroma component extraction and recovery equipment according to claim 1, characterized in that: The linkage adjustment mechanism includes a driven gear (61), a driving gear (62) and a second pulley set (63), wherein the driven gear (61) is coaxially fixedly connected to the ball screw (34), the driving gear (62) is rotatably connected to the inner wall of the protective shell (6), the rotating rod (31) passes through the driving gear (62), the second pulley set (63) is connected between the two ball screws (34), a plurality of linkage tooth grooves are provided at the center of the driving gear (62), a screw (64) is rotatably connected to the top of the rotating rod (31), and the screw ( 64) A disc is movably sleeved at the bottom end, and the bottom end of the disc is fixedly connected to a connecting rod (65) that is slidably connected to the inner wall of the rotating rod (31), and the bottom end of the connecting rod (65) is fixedly connected to a pushing block (66), and the inside of the rotating rod (31) is slidably connected to a slider (67) that is adapted to the linkage tooth groove, and the pushing block (66) and the slider (67) are provided with mutually abutting beveled surfaces, and the bottom end of the slider (67) is fixedly connected to a limiting block (68), and a return spring (69) is fixedly connected between the limiting block (68) and the inner wall of the rotating rod (31).

10. The extraction process of the natural tea aroma component extraction and recovery equipment according to claim 1, characterized in that: The steps include: Step 1: Adding raw materials: Add the tea raw materials to be prepared with aroma into the extraction tank (1). The tea raw materials are fully washed, dried, crushed and other processing steps before being added; Step 2: Extraction, the gas medium in the gas cylinder (21) is passed into the extraction tank (1) through the intermediate storage tank (22), at which time each curved umbrella rib (36) is in an open state, changing the pressure and temperature in the extraction tank (1), so that the gas medium contacts with the tea aroma components to form a supercritical fluid, and enters the three-phase separation tank (5) through the connecting pipe (54), and is purified and separated by the primary separation net (51) and the secondary separation net (52) in the three-phase separation tank (5), thereby extracting the aroma components; Step 3: gas reflux utilization, the separated gas re-enters the gas cylinder (21) through the reflux pipe (53) and the serpentine coil pipe (55) for secondary utilization; Step 4: Cleaning, controlling the rotating rod (31) and the ball screw (34) to be linked, so that the rotating rod (31) drives the ball screw (34) to rotate, so that the blocking frame (35) moves up, and the bent umbrella rib (36) encounters the main limit rod (39) and the limit tube (231) to block, completing the contraction of the through-hole folding plate (37), and scraping the tea leaves that may remain adhered to the material into the discharge pipe for discharge.

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