CN112889939A - Process for preparing tea polyphenol - Google Patents
Process for preparing tea polyphenol Download PDFInfo
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- CN112889939A CN112889939A CN202011465883.5A CN202011465883A CN112889939A CN 112889939 A CN112889939 A CN 112889939A CN 202011465883 A CN202011465883 A CN 202011465883A CN 112889939 A CN112889939 A CN 112889939A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/06—Treating tea before extraction; Preparations produced thereby
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/166—Addition of, or treatment with, enzymes or microorganisms
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Abstract
The application provides a process for preparing tea polyphenol, which comprises the following steps: (1) tea leaf pretreatment: picking fresh tea leaves, spreading and airing, deactivating enzymes in the tea industry under microwave by using a de-enzyming and crushing device until the water content reaches 70-75%, and crushing standby tea leaves in a crusher to prepare tea powder for standby; (2) wall breaking: mixing the standby tea powder with a citric acid aqueous solution according to a ratio of 1 kg of tea powder to 20-40L, firstly performing microwave extraction, and then adding wood fiber hydrolase superfine powder for enzymolysis; adding pectinase superfine powder and xylanase superfine powder for enzymolysis, and boiling; (3) extraction: extracting the enzymatic hydrolysate obtained in the step (2) in a reaction kettle at 90-100 ℃ under the pressure of 0.5-0.8 MPa for 10-15 min, then extracting for 5-8 min under the ultrasonic power of 80-100W, filtering to remove residues, centrifuging the filtrate, and collecting the supernatant. The invention has simple preparation process, and the crusher provided by the invention can integrate fixation and crushing into a whole, is automatically operated and is convenient and quick to use.
Description
Technical Field
The application relates to the technical field of tea polyphenol processing, in particular to a process for preparing tea polyphenol.
Background
At present, the traditional methods for preparing tea polyphenol from tea leaves are mainly divided into the following three types: the solvent extraction method is characterized in that tea leaves are soaked by polar solvent, then the leaching solution is subjected to liquid-liquid extraction separation, and finally the product is obtained by concentration, the current industrial production mainly adopts the method, the yield of tea polyphenol is 5-10%, the product purity is 80-98%, the used solvent comprises acetone, diethyl ether, methanol, hexane, trichloromethane and the like, and the method has high production cost and is easy to cause pollution; the ion precipitation method uses metal to precipitate tea polyphenol, so that the tea polyphenol is separated from caffeine, heavy metal toxic to human bodies is used as a precipitator, and products produced by the method hardly meet the requirements of food and medicine industries; the column separation preparation method mainly comprises a gel column, an adsorption column and an ion exchange column method, and the key of the technology is column filling and leaching. Research shows that the column separation preparation method is adopted, the yield of the tea polyphenol is between 4% and 8%, the purity can reach 98%, but the column filling material is very expensive, and various and large amounts of organic solvents are required during leaching, so that the method is obviously not suitable for industrial production. The traditional methods all have some problems and disadvantages, and the product can not completely meet the requirements of food additives and the pharmaceutical industry in the aspects of safety, price and purity.
The prior art CN1482126A discloses a method for extracting tea polyphenol, which comprises the steps of tea extraction, tea water rough filtration, ultrafiltration pectin removal, nanofiltration or reverse osmosis dehydration concentration, vacuum concentration, sprayer drying to obtain powdery tea extract, decompression separation under the condition that carbon dioxide supercritical fluid pressure is 25-30MPa and temperature is 35-50 ℃ and water is used as an auxiliary solvent, separation analysis pressure is 5-6MPa, caffeine and extracted tea polyphenol in the powdery tea extract are removed, deionized water is used for dissolving the tea extract, ethyl acetate is used for extraction, high-purity tea polyphenol is prepared by desolventizing, spraying and drying, the product purity is more than 98%, the extraction rate is more than 10%, and the caffeine is less than 0.1%, however, the invention adopts a supercritical CO2 extraction technology, the operation pressure is high, the switch is frequent, the design experience and the effective design method are lacked, a sealing element cannot be used repeatedly, and no design method of the equipment exists in China, The production standard can not realize large-scale standardized production, tea polyphenol is oxidized or structurally damaged in the extraction process, and tea leaves are not treated in advance, and the natural polyphenol oxidase is contained in the tea leaves, so that the polyphenol oxidase can be released due to the damage of cells, and the yield and the quality of the tea polyphenol product are influenced.
Disclosure of Invention
The present application provides to improve the above-mentioned problems.
The invention is particularly such that:
a process for preparing tea polyphenol comprises the following steps:
(1) tea leaf pretreatment: picking fresh tea leaves, spreading and airing, deactivating enzymes in the tea industry under microwave by using a de-enzyming and crushing device until the water content reaches 70-75%, and crushing standby tea leaves in a crusher to prepare tea powder for standby;
(2) wall breaking: mixing the standby tea powder with a citric acid aqueous solution according to a ratio of 1 kg of tea powder to 20-40L, firstly performing microwave extraction, and then adding wood fiber hydrolase superfine powder for enzymolysis; adding pectinase superfine powder and xylanase superfine powder for enzymolysis, and boiling;
(3) extraction: extracting the enzymatic hydrolysate obtained in the step (2) in a reaction kettle at 90-100 ℃ under the pressure of 0.5-0.8 MPa for 10-15 min, then extracting for 5-8 min under the ultrasonic power of 80-100W, filtering to remove residues, centrifuging the filtrate, collecting the supernatant, and extracting with ethyl acetate;
(4) concentrating and drying: and (4) desolventizing and spray drying the extract liquor obtained in the step (3) to obtain the tea polyphenol product.
Furthermore, the water-removing crushing equipment comprises a processing box, wherein a central groove is formed in the middle of the processing box, a shaft groove is communicated with the bottom of the central groove, a double-shaft motor is installed in the central groove, one shaft of the double-shaft motor is rotatably connected into the shaft groove, and a second shaft of the double-shaft motor extends out of the processing box and is connected with a top box;
a plurality of unit boxes with bottom ends open are circumferentially distributed on the side surface of the top box, and microwave generators are mounted on the outer walls of the unit boxes;
the top of the inside of the treatment box is circumferentially provided with a fixation chamber corresponding to the unit box, the lower part of the fixation chamber is communicated with a crushing chamber, and an opening and closing mechanism is arranged in the treatment box to separate or communicate the fixation chamber and the crushing chamber;
one side of the inner wall of the crushing chamber is provided with an installation cavity, a crushing motor is arranged in the installation cavity, and an output shaft of the crushing motor is connected with a crushing mechanism positioned in the crushing chamber;
the bottom end of the crushing chamber is open, and the bottom of the treatment box is fixed with a blanking mechanism so as to open and close the bottom end of the crushing chamber.
Furthermore, the open bottom surface in bottom of unit box is used for laminating in the top surface of handling the case, and the bottom surface of unit box is provided with annular sealing washer, wherein has transparent through window on the casing of unit box.
Furthermore, a cavity is arranged in the treatment box and communicated with the shaft groove, and the number of the partition plates corresponding to the number of the fixation chambers is fixed on the outer side of a shaft of the double-shaft motor, wherein a shaft of the double-shaft motor rotates to drive each partition plate to rotate in the cavity, and when the partition plates are located at a specific position, the fixation chambers and the corresponding crushing chambers are separated.
Further, the separator is a glass plate or a ceramic plate.
Furthermore, the crushing mechanism comprises a rotating shaft in driving connection with an output shaft of the crushing motor and a plurality of crushing discs which are arranged on the outer side of the rotating shaft and distributed along the axial direction.
Furthermore, a plurality of guide chutes are formed in the outer wall of the rotating shaft along the axial direction, the crushing discs are disc-shaped cutters, sliding blocks in sliding fit with the guide chutes are fixed on the inner rings of the crushing discs, and adjacent crushing discs are connected through a telescopic mechanism movably sleeved on the outer side of the rotating shaft.
Furthermore, a driving mechanism for driving the crushing disc to slide along the rotating shaft is arranged on the inner wall of the crushing chamber.
Furthermore, the driving mechanism comprises a placing groove arranged on the inner wall of the crushing chamber, an electromagnet arranged in the placing groove and a pushing piece movably sleeved on the outer side of one end of the rotating shaft, a magnetic block is fixed on one side of the pushing piece close to the electromagnet, and the electromagnet is repelled with the magnetic block after being electrified.
Furthermore, telescopic machanism is including the sliding sleeve of cover establishing in the pivot outside, along a plurality of slots that the sliding sleeve axial was seted up, fix the spring at the slot middle part and install the spliced pole at the spring both ends respectively, the terminal of spliced pole of both sides respectively with adjacent broken dish side fixed connection.
The invention has the beneficial effects that:
when the tea leaf processing box works, the top of the fixation chamber of the processing box is open, tea leaves are placed into the fixation chambers, the double-shaft motor works before the tea leaves are placed, the first driving shaft rotates to drive the partition plates to separate the fixation chambers from the crushing chambers, the second driving shaft rotates when the double-shaft motor works after the tea leaves are placed into the fixation chambers, the top box is driven to rotate, each unit box covers the corresponding top opening of the fixation chamber, then the microwave generator works to dehydrate the tea leaves in the fixation chambers, and the microwave fixation is used for fixation, so that the effect is better.
After the tea leaves are completely enzyme-deactivated, the double-shaft motor works, the first driving shaft rotates to drive the partition plate to be accommodated in the cavity, the tea leaves fall into the crushing chamber, the crushing motor works to drive the crushing disc on the outer side of the rotating shaft to crush the tea leaves, the electromagnet is electrified to work to enable the electromagnet to repel the magnetic blocks, the pushing piece is driven to push the crushing disc on the rotating shaft to approach, the gap between the crushing discs is reduced, the crushing is more thorough, the crushing effect is convenient to adjust, the magnetic size of the electromagnet is changed by adjusting the intensity of current led into the electromagnet, and the moving distance of the pushing piece is changed, so that the purpose can be achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged view taken at A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of a portion of the crushing mechanism of the present invention;
FIG. 4 is a schematic top view of the processing chamber of the present invention;
FIG. 5 is a schematic cross-sectional view of a treatment tank according to the present invention;
FIG. 6 is a schematic diagram of a set-top box according to the present invention;
fig. 7 is a schematic structural view of a two-shaft motor according to the present invention;
fig. 8 is a perspective view of the crushing mechanism of the present invention.
Icon: the device comprises a processing box 1, an air cavity 2, a fan 3, a first air outlet 41, a second air outlet 42, a microwave generator 5, a cavity 6, a top box 7, a unit box 71, a double-shaft motor 8, a first shaft 81, a second shaft 82, a green removing chamber 9, a crushing chamber 10, a crushing mechanism 11, a crushing motor 12, a switching motor 13, a shaft groove 14, an installation cavity 15, a bottom plate 16, a central groove 17, a rotating shaft 18, a guide sliding groove 19, a crushing disc 20, a connecting piece 21, a sliding sleeve 22, a connecting column 23, a spring 24, a slot 25, an electromagnet 26, a placing groove 27, a pushing piece 28 and a magnetic block 29.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is usually understood by those skilled in the art, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Example (b):
a process for preparing tea polyphenol comprises the following steps:
(1) tea leaf pretreatment: picking fresh tea leaves, spreading and airing, deactivating enzymes in the tea industry under microwave by using a de-enzyming and crushing device until the water content reaches 70-75%, and crushing standby tea leaves in a crusher to prepare tea powder for standby;
(2) wall breaking: mixing the standby tea powder with a citric acid aqueous solution according to a ratio of 1 kg of tea powder to 20-40L, firstly performing microwave extraction, and then adding wood fiber hydrolase superfine powder for enzymolysis; adding pectinase superfine powder and xylanase superfine powder for enzymolysis, and boiling;
(3) extraction: extracting the enzymatic hydrolysate obtained in the step (2) in a reaction kettle at 90-100 ℃ under the pressure of 0.5-0.8 MPa for 10-15 min, then extracting for 5-8 min under the ultrasonic power of 80-100W, filtering to remove residues, centrifuging the filtrate, collecting the supernatant, and extracting with ethyl acetate;
(4) concentrating and drying: and (4) desolventizing and spray drying the extract liquor obtained in the step (3) to obtain the tea polyphenol product.
Referring to fig. 1, further, the de-enzyming and crushing device includes a processing box 1, a central groove 17 is arranged in the middle of the processing box 1, a shaft groove 14 is arranged at the bottom of the central groove 17 in a communicating manner, a double-shaft motor 8 is installed in the central groove 17, a first shaft 81 of the double-shaft motor 8 is rotatably connected in the shaft groove 14, and a second shaft 82 of the double-shaft motor 8 extends out of the processing box 1 and is connected with a top box 7;
referring to fig. 1, a plurality of unit boxes 71 with open bottom ends are circumferentially distributed on the side surface of the top box 7, and a microwave generator 5 is mounted on the outer wall of each unit box 71;
referring to fig. 1, a water-removing chamber 9 corresponding to the unit box 71 is circumferentially arranged at the top in the processing box 1, crushing chambers 10 are respectively communicated below the water-removing chamber 9, and an opening-closing mechanism is arranged in the processing box 1 to separate or communicate the water-removing chamber 9 and the crushing chambers 10;
referring to fig. 1, a mounting cavity 15 is formed in each of the inner walls of a crushing chamber 10, a crushing motor 12 is disposed in each mounting cavity 15, and an output shaft of each crushing motor 12 is connected with a crushing mechanism 11 located in the crushing chamber 10;
referring to fig. 1, the bottom end of the crushing chamber 10 is open, and a discharging mechanism is fixed at the bottom of the processing box 1 for opening and closing the bottom end opening of the crushing chamber 10.
Referring to fig. 1, 4, 5 and 6, further, the bottom surface of the unit box 71 with the open bottom end is used for being attached to the top surface of the processing box 1, and the bottom surface of the unit box 71 is provided with an annular sealing ring, wherein a transparent through window is arranged on the casing of the unit box 71.
Referring to fig. 1 and 7, further, a cavity 6 is disposed in the processing box 1, the cavity 6 is communicated with the shaft groove 14, and the number of the partition boards corresponding to the number of the fixation chambers 9 is fixed on the outer side of a first shaft 81 of the double-shaft motor 8, wherein the first shaft 81 of the double-shaft motor 8 drives the partition boards to rotate so as to drive the partition boards to rotate in the cavity 6, and the partition boards are located at a specific position to partition the fixation chambers 9 and the corresponding crushing chambers 10.
Referring to fig. 1, further, the separator is a glass plate or a ceramic plate.
Referring to fig. 1 and 3, further, the crushing mechanism 11 includes a rotating shaft 18 drivingly coupled to an output shaft of the crushing motor 12, and a plurality of crushing discs 20 mounted on an outer side of the rotating shaft 18 and axially distributed.
Referring to fig. 3 and 8, further, a plurality of guide sliding grooves 19 are axially formed in an outer wall of the rotating shaft 18, the crushing discs 20 are disc-shaped cutters, sliding blocks in sliding fit with the guide sliding grooves 19 are fixed on inner rings of the crushing discs 20, and adjacent crushing discs 20 are connected through a telescopic mechanism movably sleeved on an outer side of the rotating shaft 18.
Referring to fig. 2, further, a driving mechanism for driving the crushing disk 20 to slide along the rotating shaft 18 is installed on the inner wall of the crushing chamber 10.
Referring to fig. 2, further, the driving mechanism includes a placement groove 27 opened on the inner wall of the crushing chamber 10, an electromagnet 26 disposed in the placement groove 27, and a pushing member 28 movably sleeved on the outer side of one end of the rotating shaft 18, a magnetic block 29 is fixed on one side of the pushing member 28 close to the electromagnet 26, and the electromagnet 26 repels the magnetic block 29 after being energized.
Referring to fig. 3, further, the telescoping mechanism includes a sliding sleeve 22 sleeved outside the rotating shaft 18, a plurality of slots 25 formed along an axial direction of the sliding sleeve 22, springs 24 fixed in a middle portion of the slots 25, and connecting columns 23 respectively installed at two ends of the springs 24, and ends of the connecting columns 23 at two sides are respectively fixedly connected with side surfaces of the adjacent crushing discs 20.
When the invention works, the top opening of the green removing chamber 9 of the processing box 1 is opened, tea leaves are put into each green removing chamber 9, before the tea leaves are put, the double-shaft motor 8 works, the first driving shaft 81 rotates to drive each partition plate to separate the green removing chamber 9 and the crushing chamber 10, after the tea leaves are put into the green removing chamber 9, the second driving shaft of the double-shaft motor works to drive the top box 7 to rotate, so that each unit box is covered at the top opening of the corresponding green removing chamber 9, then the microwave generator works to dehydrate the tea leaves in the green removing chamber 9, after the green removing is finished, the double-shaft motor 8 works, the first driving shaft 81 rotates to drive the partition plates to be accommodated in the cavity 6, the tea leaves fall into the crushing chamber 10, at the moment, the crushing motor 12 works to drive the crushing disc 20 on the outer side of the rotating shaft 18 to crush the tea leaves, the electromagnet 26 is electrified to work to repel the magnetic block 29, so as to drive the pushing piece 28 to push the, the gap between the crushing discs 20 is reduced, so that the crushing is more thorough, the crushing effect is convenient to adjust, the magnetic size of the electromagnet 26 is changed by adjusting the intensity of the current led into the electromagnet 26, and the moving distance of the pushing piece 28 is changed, so that the purpose can be achieved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A process for preparing tea polyphenol is characterized by comprising the following steps:
(1) tea leaf pretreatment: picking fresh tea leaves, spreading and airing, deactivating enzymes in the tea industry under microwave by using a de-enzyming and crushing device until the water content reaches 70-75%, and crushing standby tea leaves in a crusher to prepare tea powder for standby;
(2) wall breaking: mixing the standby tea powder with a citric acid aqueous solution according to a ratio of 1 kg of tea powder to 20-40L, firstly performing microwave extraction, and then adding wood fiber hydrolase superfine powder for enzymolysis; adding pectinase superfine powder and xylanase superfine powder for enzymolysis, and boiling;
(3) extraction: extracting the enzymatic hydrolysate obtained in the step (2) in a reaction kettle at 90-100 ℃ under the pressure of 0.5-0.8 MPa for 10-15 min, then extracting for 5-8 min under the ultrasonic power of 80-100W, filtering to remove residues, centrifuging the filtrate, collecting the supernatant, and extracting with ethyl acetate;
(4) concentrating and drying: and (4) desolventizing and spray drying the extract liquor obtained in the step (3) to obtain the tea polyphenol product.
2. The process for preparing tea polyphenol as claimed in claim 1, wherein the de-enzyming and crushing equipment comprises a treatment box (1), a central groove (17) is formed in the middle of the treatment box (1), a shaft groove (14) is formed in the bottom of the central groove (17) in a communicating mode, a double-shaft motor (8) is installed in the central groove (17), a first shaft (81) of the double-shaft motor (8) is rotatably connected into the shaft groove (14), and a second shaft (82) of the double-shaft motor (8) extends out of the treatment box (1) and is connected with a top box (7);
a plurality of unit boxes (71) with bottom ends open are circumferentially distributed on the side surface of the top box (7), and microwave generators (5) are mounted on the outer walls of the unit boxes (71);
a green removing chamber (9) corresponding to the unit box (71) is arranged at the inner top of the treatment box (1) in the circumferential direction, crushing chambers (10) are communicated below the green removing chamber (9), and an opening and closing mechanism is arranged in the treatment box (1) to separate or communicate the green removing chamber (9) and the crushing chambers (10);
one side of the inner wall of the crushing chamber (10) is provided with a mounting cavity (15), a crushing motor (12) is arranged in the mounting cavity (15), and an output shaft of the crushing motor (12) is connected with a crushing mechanism (11) positioned in the crushing chamber (10);
the bottom end of the crushing chamber (10) is open, and the bottom of the treatment box (1) is fixed with a blanking mechanism for opening and closing the bottom end opening of the crushing chamber (10).
3. The process for preparing tea polyphenol as claimed in claim 2, wherein the bottom surface of the unit box (71) with the bottom end open is used for being attached to the top surface of the treatment box (1), the bottom surface of the unit box (71) is provided with an annular sealing ring, and a transparent penetrating window is arranged on the shell of the unit box (71).
4. The process for preparing tea polyphenol as claimed in claim 2, wherein a cavity (6) is arranged in the treatment box 1, the cavity (6) is communicated with the shaft groove (14), and the outer side of a first shaft (81) of the double-shaft motor (8) is fixed with partition plates corresponding to the number of the fixation chambers (9), wherein the first shaft (81) of the double-shaft motor (8) drives the first shaft (81) to rotate so as to drive each partition plate to rotate in the cavity (6), and when the partition plates are located at a specific position, the fixation chambers (9) and the corresponding crushing chambers (10) are partitioned.
5. The process of claim 4, wherein the spacer is a glass plate or a ceramic plate.
6. A process for preparing tea polyphenol according to claim 4, wherein the crushing mechanism (11) comprises a rotating shaft (18) in driving connection with the output shaft of the crushing motor (12), and a plurality of crushing discs (20) which are arranged outside the rotating shaft (18) and distributed along the axial direction.
7. The process for preparing tea polyphenol according to claim 4, wherein a plurality of guide chutes (19) are formed in the outer wall of the rotating shaft (18) along the axial direction, the crushing discs (20) are disc-shaped cutters, slide blocks which are in sliding fit with the guide chutes (19) are fixed on the inner rings of the crushing discs (20), and adjacent crushing discs (20) are connected through a telescopic mechanism which is movably sleeved on the outer side of the rotating shaft (18).
8. A process for preparing tea polyphenol according to claim 7, wherein the inner wall of the crushing chamber (10) is provided with a driving mechanism for driving the crushing disc (20) to slide along the rotating shaft (18).
9. The process for preparing tea polyphenol according to claim 8, wherein the driving mechanism comprises a placing groove (27) arranged on the inner wall of the crushing chamber (10), an electromagnet (26) arranged in the placing groove (27), and a pushing member (28) movably sleeved on the outer side of one end of the rotating shaft (18), wherein a magnetic block (29) is fixed on one side of the pushing member (28) close to the electromagnet (26), and the electromagnet (26) is repelled with the magnetic block (29) after being electrified.
10. The process for preparing tea polyphenol as claimed in claim 7, wherein the telescoping mechanism comprises a sliding sleeve (22) sleeved outside the rotating shaft (18), a plurality of slots (25) axially formed along the sliding sleeve (22), a spring (24) fixed in the middle of the slot (25), and connecting columns (23) respectively installed at two ends of the spring (24), and the tail ends of the connecting columns (23) at two sides are respectively fixedly connected with the side surfaces of the adjacent crushing discs (20).
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| CN108690097A (en) * | 2018-04-23 | 2018-10-23 | 浙江师范大学 | A kind of extracting method of tea polyphenols |
| CN108477349A (en) * | 2018-06-26 | 2018-09-04 | 无锡市茶叶品种研究所有限公司 | A kind of production equipment and production method of fresh tea beverage |
| CN111841791A (en) * | 2020-07-29 | 2020-10-30 | 安徽砀山海升果业有限责任公司 | Composite fruit tea beverage crushing device and fruit crushing method |
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