CN210901229U - Production line of low-caffeine instant tea - Google Patents
Production line of low-caffeine instant tea Download PDFInfo
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- CN210901229U CN210901229U CN201921798213.8U CN201921798213U CN210901229U CN 210901229 U CN210901229 U CN 210901229U CN 201921798213 U CN201921798213 U CN 201921798213U CN 210901229 U CN210901229 U CN 210901229U
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Abstract
A production line of low-caffeine instant tea comprises a plant pulverizer, an ultrasonic extractor, a discharge centrifuge, a decaffeination device, a membrane filtration device and a spray drying machine set. The production line has simple flow and obvious decaffeination effect, and can ensure that the content of the caffeine in the instant tea product is lower than 1 percent, thereby reducing the harm of excessive caffeine intake to human bodies, expanding the applicable range of the instant tea and being suitable for all people. In addition, through improving traditional decaffeination device for the cooling water can carry out the heat exchange with the internal liquid of cauldron more fast, thereby improves the exothermic efficiency of caffeine adsorbent, and then improves caffeine adsorption effect, and be convenient for transportation and subsequent maintenance.
Description
Technical Field
The utility model relates to an instant tea preparation technical field especially indicates a production line of low caffeine instant tea.
Background
The instant tea is a solid beverage tea which can be quickly dissolved in water. Finished tea, semi-finished tea, tea by-products or fresh leaves are used as raw materials, and the raw materials are processed into granular, powdery or flaky novel beverage which is easy to dissolve in water and has no tea residue through the technical processes of extraction, filtration, concentration, drying and the like, and the beverage has the advantages of convenient drinking and carrying, no pesticide residue and the like.
The applicant filed a Chinese patent in 2019, 04.30.s.a.application for a production process of instant tea powder and a spray dryer discharging device (application number CN 201910363003.4) applied to the production process, the production process comprises the steps of crushing Tieguanyin tea leaves, extracting, centrifuging and ultrafiltering obtained extracting solution to obtain ultrafiltrate, concentrating and spray-drying the ultrafiltrate to obtain instant tea powder, packaging, and sterilizing the packaged instant tea powder by an irradiation sterilization method.
Although the patent can be used for preparing instant tea powder, the instant tea prepared by the traditional preparation process also contains a large amount of caffeine due to the caffeine contained in the tea leaves, and the high-dose caffeine intake can stimulate the central nerve, influence the sleep, increase the blood pressure, improve the prevalence rate of rheumatoid arthritis, cause mutation, cause premature delivery of infants and the like. Therefore, in order to expand the applicable range of the instant tea and make the instant tea suitable for all people, both sexes and children, the content of caffeine in the instant tea needs to be reduced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a production line of low caffeine instant tea, its main aim at overcome the defect that caffeine content is high in the current instant tea.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a production line of low-caffeine instant tea comprises
A plant pulverizer for pulverizing tea leaves into pulverized tea;
an ultrasonic extractor for mixing the crushed tea and water to make an extract;
a discharge centrifuge for filtering the extract to obtain a filtrate;
a decaffeination apparatus for decaffeinating the filtrate to produce a decaffeinated filtrate;
membrane filtration means for membrane filtering the decaffeinated filtrate to obtain a clear liquid;
a membrane concentration device for membrane concentration of the clear liquid to obtain a concentrated liquid;
a spray drying unit for drying the concentrate to obtain low caffeine instant tea powder.
Further, the ultrasonic extractor is an external circulation ultrasonic extractor.
Further, the discharging centrifuge is a scraper discharging centrifuge.
Further, the decaffeination device comprises an installation platform, a kettle body, an upper shell, a lower shell, a kettle cover, a stirring mechanism, a locking assembly and a water chiller, wherein the kettle cover is covered on the upper side of the kettle body, the stirring mechanism is used for stirring materials in the kettle body, a filtrate feeding hole and an adsorbent feeding hole are formed in the kettle cover, and a discharging hole is formed in the lower side of the kettle body; the outer side wall of the kettle body is provided with a water passing groove, a first annular water groove and a second annular water groove, the water passing groove is spiral from top to bottom, the upper end of the water passing groove is communicated with the first annular water groove, and the lower end of the water passing groove is communicated with the second annular water groove; the lower shell is covered on the lower part of the outer side wall of the kettle body in a threaded connection manner and supports the kettle body upwards, and the upper shell is covered on the upper part of the outer side wall of the kettle body; the locking assembly can press the upper shell towards the lower shell and lock and fix the upper shell and the lower shell on the mounting platform; the upper shell is provided with a first water delivery port communicated with the first annular water tank, the lower shell is provided with a second water delivery port communicated with the second annular water tank, and the first water delivery port and the second water delivery port are respectively communicated with a water outlet and a water inlet of the water cooling machine, so that water can flow in the first annular water tank, the water passing tank and the second annular water tank.
Further, be equipped with the external screw thread on the cauldron external side wall, be equipped with the internal thread with this external screw thread looks adaptation on the internal side wall of inferior valve, the external screw thread with cross the water channel and roughly form a pair of heliciform.
Furthermore, an upper annular support is arranged at the bottom of the outer side wall of the upper shell, an upper arc-shaped groove is formed in the upper annular support, a lower annular support is arranged at the top of the outer side wall of the lower shell, a lower arc-shaped groove is formed in the lower annular support, the locking assembly comprises a plurality of locking bolts, a screw hole matched with the locking bolts is formed in the mounting platform, rod portions of the locking bolts can penetrate through the upper arc-shaped groove and the lower arc-shaped groove which correspond to each other from top to bottom and are connected in the screw hole in a locking mode, and the upper annular support and the lower annular support are clamped between the mounting platform and the heads of the locking bolts.
Further, a plurality of lifting lugs arranged at intervals are arranged at the upper end of the kettle body, a plurality of insertion holes are formed in the lower end of the kettle cover, and when the kettle cover is arranged on the kettle body, the plurality of lifting lugs can be inserted into the plurality of insertion holes in a one-to-one correspondence manner.
Further, the stirring mechanism comprises a stirring shaft, a plurality of stirring blades and a driving motor arranged on the upper side of the kettle cover, and the stirring shaft is connected to the driving end of the driving motor and extends downwards into the kettle body; the plurality of stirring blades are positioned in the kettle body and are arranged on the stirring shaft at intervals.
Compared with the prior art, the utility model discloses the beneficial effect who produces lies in:
1. the production line has simple operation flow and obvious decaffeination effect, and can ensure that the content of the caffeine in the instant tea product is lower than 1 percent, thereby reducing the harm of excessive caffeine intake to human bodies, expanding the applicable range of the instant tea and being suitable for all people.
2. The utility model discloses in, through improving traditional decaffeination device, have following advantage: the water passing tank is arranged on the outer side wall of the kettle body, so that cooling water in the water passing tank can exchange heat with liquid in the kettle body more quickly, the heat release efficiency of the caffeine adsorbent is improved, and the caffeine adsorption effect is improved; secondly, the kettle body and the shell are designed in a split mode, so that batch manufacturing of manufacturers is facilitated, and among a plurality of components, a single component is light in weight and convenient to transport; thirdly, the split type design of cauldron body and casing can be convenient for the user later stage to the maintenance of crossing the basin, avoids crossing remaining incrustation scale influence heat exchange in the basin.
Drawings
Fig. 1 is a flow chart of the preparation process of the present invention.
Fig. 2 is a schematic structural view of the decaffeination apparatus of the present invention.
Fig. 3 is an enlarged schematic view of a in fig. 2.
Fig. 4 is a plan view of the decaffeination apparatus of the present invention.
Fig. 5 is a cross-sectional view of the kettle body in the present invention.
Fig. 6 is a schematic view of the kettle body and the kettle cover in a split manner.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
Refer to fig. 1. A preparation process of low-caffeine instant tea comprises the following steps:
1) crushing: crushing tea leaves to be processed by a plant crusher 1 to obtain crushed tea; in the embodiment, the tea leaves are Tie Guanyin tea leaves;
2) water extraction: putting the broken tea and water into an ultrasonic extractor 2 according to the proportion of 1:20 for extraction to obtain an extracting solution;
3) and (3) filtering: conveying the extracting solution to a discharge centrifuge 3 for filtering to obtain filtrate;
4) decaffeination: transferring the filtrate and the caffeine adsorbent to a decaffeination apparatus 4 to perform decaffeination to obtain decaffeinated filtrate; wherein the caffeine adsorbent is macroporous resin, the macroporous resin adsorbs caffeine as monomolecular layer, and the adsorption of caffeine is an exothermic process, and the adsorption capacity of the adsorbent is reduced when the temperature is increased;
5) and (3) ultrafiltration: transferring the decaffeinated filtrate to a membrane filtration device 5 for membrane filtration treatment to obtain a clear liquid;
6) concentration: conveying the clear liquid to a membrane concentration device 6 for membrane concentration treatment to obtain a concentrated solution;
7) spray drying: and conveying the concentrated solution to a spray drying unit 7 for drying treatment to obtain the low-caffeine instant tea powder.
The utility model discloses process operation flow is simple to the decaffeination effect is showing, can make the caffeine content in the instant tea product be less than 1%, thereby has reduced the harm of excessive caffeine of ingesting to the human body, has enlarged the applicable face of instant tea, and is suitable for all ages and both sexes.
Reference is made to fig. 1, 2, 3, 4, 5 and 6. A production line of low-caffeine instant tea comprises
A plant pulverizer 1 for pulverizing tea leaves into pulverized tea;
an ultrasonic extractor 2 for mixing the crushed tea and water to make an extract;
a discharge centrifuge 3 for filtering the extract to obtain a filtrate; the discharge end of the ultrasonic extractor 2 and the feed end of the discharge centrifuge 3 can be communicated through a transmission pipeline;
a decaffeination device 4 for decaffeinating the filtrate to produce a decaffeinated filtrate; the filtrate feed inlet 451 of the decaffeination device 4 and the discharge end of the discharge centrifuge 3 can be communicated through a transmission pipeline;
a membrane filtration device 5 for performing membrane filtration on the decaffeinated filtrate to obtain a clear liquid; the feed end of the membrane filtering device 5 is communicated with the discharge hole 421 of the decaffeination device 4 through a transmission pipeline;
a membrane concentration device 6 for performing membrane concentration on the clear liquid to obtain a concentrated liquid; the feed end of the membrane concentration device 6 is communicated with the discharge end of the membrane filtration device 5 through a transmission pipeline;
and the spray drying unit 7 is used for drying the concentrated solution to obtain the low-caffeine instant tea powder, and the feeding end of the spray drying unit 7 and the discharging end of the membrane concentration device 6 can be communicated through a transmission pipeline.
Wherein the ultrasonic extractor is an external circulation ultrasonic extractor. The ultrasonic wave has the characteristics of cavitation phenomenon, mechanical vibration, thermal effect and the like, the cavitation phenomenon can generate instant pressure of thousands of times, so that micro bubbles in an extraction medium are compressed and burst, the extracted raw material and cell walls are crushed, the dissolution of natural medicinal components is accelerated, the diffusion of the dissolved components is further enhanced by the mechanical vibration and the thermal effect, the medicinal components quickly reach the concentration balance in the extraction medium, the extraction cost can be greatly reduced, the product quality is improved, and the ultrasonic wave is the most promising extraction technology in the current leaching extraction. The external circulation ultrasonic extractor is developed on the basis of traditional ultrasonic extraction and can be used for actual amplification production, and generally comprises an ultrasonic kettle, an extraction kettle, an ultrasonic generator, a circulating delivery pump and the like.
The discharging centrifugal machine is a scraper discharging centrifugal machine. The scraper discharge centrifuge can automatically realize the working procedures of feeding, separation, washing, dewatering, liquid discharge, discharging, net washing and the like under the full-speed operation. The device has the characteristics of novel structure, stable operation, high automation degree, low labor intensity, large production capacity, good washing effect, low moisture content of filter cakes and the like. Is suitable for separating suspension containing solid phase with particle size of more than 0.015mm and concentration in 25-60%. The principle is that the scraper discharge centrifuge main motor drives the sleeved inner and outer rotary drums to rotate at full speed, materials are introduced into the rotary drums through the feeding pipes, liquid phase substances pass through the filter cloth and the filter holes of the wall of the inner rotary drum and are discharged out of the inner rotary drum under the action of centrifugal force, are collected in a gap between the inner rotary drum and the outer rotary drum, pass through the through hole of the siphon chamber, enter the siphon chamber, and are pumped out of the machine through the siphon device. The solid phase is trapped in the inner rotary drum to form an annular filter cake layer. The feed is stopped after the feed reaches a predetermined volume and further separated, at which point washing may be performed. After washing and separation, the scraper automatically rotates to scrape the solid phase matter off and discharge the solid phase matter out of the machine through the conveying screw, and then the net is automatically washed to start the next cycle.
Refer to fig. 2, 3, 4, 5 and 6. The decaffeination device 4 comprises a mounting platform 41, a kettle body 42, an upper shell 43, a lower shell 44, a kettle cover 45 covering the upper side of the kettle body 42, a stirring mechanism 46 for stirring the materials in the kettle body 42, a locking assembly 47 and a water cooler 48, wherein the kettle cover 45 is provided with a filtrate feeding hole 451 and an adsorbent feeding hole 452, and the lower side of the kettle body 42 is provided with a discharging hole 421; the outer side wall of the kettle body 42 is provided with a water passing groove 421, a first annular water groove 422 and a second annular water groove 423, the water passing groove 421 is spiral from top to bottom, the upper end of the water passing groove 421 is communicated with the first annular water groove 422, and the lower end of the water passing groove 421 is communicated with the second annular water groove 423; the lower shell 44 is covered on the lower part of the outer side wall of the kettle body 42 in a threaded connection way and supports the kettle body 42 upwards, and the upper shell 43 is covered on the upper part of the outer side wall of the kettle body 42; the locking assembly 47 can press the upper shell 43 towards the lower shell 44 and lock and fix the upper shell 43 and the lower shell 44 on the mounting platform 41; the upper shell 43 is provided with a first water delivery port 431 communicated with the first annular water tank 422, the lower shell 44 is provided with a second water delivery port 441 communicated with the second annular water tank 423, and the first water delivery port 431 and the second water delivery port 441 are respectively communicated with a water outlet 481 and a water inlet 482 of the water cooler 48, so that water can flow in the first annular water tank 422, the water passing tank 421 and the second annular water tank 423. The utility model discloses a to traditional decaffeination device improve, have following advantage: the water passing tank is arranged on the outer side wall of the kettle body, so that cooling water in the water passing tank can exchange heat with liquid in the kettle body more quickly, the heat release efficiency of the caffeine adsorbent is improved, and the caffeine adsorption effect is improved; secondly, the kettle body and the shell are designed in a split mode, so that batch manufacturing of manufacturers is facilitated, and among a plurality of components, a single component is light in weight and convenient to transport; thirdly, the split type design of cauldron body and casing can be convenient for the user later stage to the maintenance of crossing the basin, avoids crossing remaining incrustation scale influence heat exchange in the basin.
In particular, the method of manufacturing a semiconductor device,
refer to fig. 2, 3, 4, 5 and 6. An external thread 424 is arranged on the outer side wall of the kettle body 42, an internal thread (not shown) matched with the external thread 424 is arranged on the inner side wall of the lower shell, and the external thread and the water passing groove form a double-spiral shape. When the lower shell 44 is covered on the lower part of the outer side wall of the kettle body 42, the inner side wall of the lower shell 44 is attached to the outer side wall of the kettle body 42, meanwhile, when the upper shell 43 is covered on the upper part of the outer side wall of the kettle body 42, the inner side wall of the upper shell 43 is attached to the outer side wall of the kettle body 42, the first water delivery port 431 is communicated with the water inlet 482 of the water cooler 48, and the second water delivery port 441 is communicated with the water outlet 481 of the water cooler 48, so that cooling water passes through the second water delivery port 441 and then sequentially flows through the second annular water tank 423, the water passing tank 421 and the first annular water tank 422 and then flows back to the water cooler from the first.
The first annular water channel 422 and the second annular water channel 423 are both horizontally arranged, and the purpose of the first annular water channel 422 is to enable the second water delivery port 441 of the second annular water channel 423 to be communicated with the first water delivery port 431 even if the upper shell 43 and the lower shell 44 rotate by a certain angle relative to the kettle 42.
Refer to fig. 2, 3, 4, 5 and 6. The bottom of the outer side wall of the upper housing 43 is provided with an upper annular support 432, the upper annular support 432 is provided with an upper arc-shaped groove 433, the top of the outer side wall of the lower housing 44 is provided with a lower annular support 442, the lower annular support 442 is provided with a lower arc-shaped groove 443, the locking assembly 47 comprises a plurality of locking bolts 471, the mounting platform 41 is provided with screw holes 411 matched with the locking bolts 471, a rod portion 4711 of each locking bolt 471 can penetrate through the upper arc-shaped groove 433 and the lower arc-shaped groove 443 which correspond to each other up and down and is connected in the screw holes 411 in a locking manner, and the upper annular support 432 and the lower annular support 442 are clamped between the mounting platform 41 and a head portion 4712 of each. In addition, an elastic sealing ring 444 may be provided on the top of the lower housing 44, so that the upper housing 43 can be abutted against the lower housing 44 through the elastic sealing ring.
The lower part of the inner side wall of the lower shell 44 is arc-shaped corresponding to the lower part of the outer side wall of the kettle body, and a through hole is arranged at the center of the lower part of the inner side wall of the lower shell 44 in the arc-shaped shape for the discharge port 421 to pass through. The upper shell 43 has an inner ring side with an inner convex portion 434, the lower side of the inner convex portion 434 is provided with an elastic sealing ring, and the inner convex portion 434 is downward against the upper end of the kettle body.
Further, fig. 2, 3, 4, 5, and 6 are referred to. A plurality of lifting lugs 425 arranged at intervals are arranged at the upper end of the kettle body 42, a plurality of insertion holes (not shown) are formed at the lower end of the kettle cover 45, when the kettle cover 45 is covered on the kettle body 42, the plurality of lifting lugs 425 can be inserted into the plurality of insertion holes in a one-to-one correspondence manner, and the outer peripheral side of the kettle cover 45 can be contacted with the inner peripheral side of the inner convex part 434. The purpose of setting up lug 425, one is that the stability when improving kettle cover 45 lid and establishing, and another is convenient for the navigation to hang and gets the cauldron body and carry out dismouting etc..
Refer to fig. 2, 3, 4, 5 and 6. The stirring mechanism 46 comprises a stirring shaft 461, a plurality of stirring blades 462 and a driving motor 463 arranged on the upper side of the kettle cover 45, wherein the stirring shaft 461 is connected with the driving end of the driving motor 463 and extends downwards into the kettle body 42; the stirring blades 462 are disposed in the kettle 42 and spaced apart from each other on the stirring shaft 461.
Refer to fig. 1. Membrane filtration is a precise separation technique that can achieve molecular-scale filtration, which is a technique that performs two-phase separation using selective permeability of membrane pores. The pressure difference between two sides of the membrane is used as driving force to make solvent, inorganic ions, small molecules and the like permeate the membrane to intercept particles and macromolecules. The membrane filtration unit 5 is generally composed of a stock solution tank (for containing the decaffeinated filtrate delivered by the decaffeination unit), a bag filter, an intermediate tank, a microfiltration membrane module, a filtrate tank (for containing the clear solution obtained after filtration).
The membrane concentration is a technology for realizing high-efficiency purification and concentration by reforming the traditional process. It utilizes the difference of molecular weight of effective component and liquid to implement directional separation so as to attain the goal of concentration. Compared with the traditional heating concentration, the method has the advantages of low energy consumption, normal temperature operation, small influence on products and the like. The membrane concentration device 6 generally consists of a raw liquid tank (for containing the clear liquid transferred by the membrane filtration device), a Ro membrane module, and a concentrated liquid storage tank (for containing the clear liquid obtained after concentration).
The spray drying unit 7 is a centrifugal spray dryer, and the working principle of the centrifugal spray dryer is as follows: the air passes through the filter and the heater and enters an air distributor at the top of the centrifugal spray dryer, and the hot air uniformly enters the dryer in a spiral shape. The feed liquid is pumped to the centrifugal atomizer on the top of the dryer from the feed liquid tank through the filter, so that the feed liquid is sprayed into tiny foggy liquid drops, the feed liquid and hot air are in parallel flow contact, moisture is rapidly evaporated, the feed liquid is dried into a finished product in a short time, the finished product is discharged from the bottom of the drying tower and the cyclone separator, and waste gas is discharged by the fan.
The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.
Claims (8)
1. A production line of low-caffeine instant tea is characterized in that: comprises that
A plant pulverizer for pulverizing tea leaves into pulverized tea;
an ultrasonic extractor for mixing the crushed tea and water to make an extract;
a discharge centrifuge for filtering the extract to obtain a filtrate;
a decaffeination apparatus for decaffeinating the filtrate to produce a decaffeinated filtrate;
membrane filtration means for membrane filtering the decaffeinated filtrate to obtain a clear liquid;
a membrane concentration device for membrane concentration of the clear liquid to obtain a concentrated liquid;
a spray drying unit for drying the concentrate to obtain low caffeine instant tea powder.
2. A low-caffeine instant tea production line as claimed in claim 1, wherein: the ultrasonic extractor is an external circulation ultrasonic extractor.
3. A low-caffeine instant tea production line as claimed in claim 1, wherein: the discharging centrifugal machine is a scraper discharging centrifugal machine.
4. A low-caffeine instant tea production line as claimed in claim 1, wherein: the decaffeination device comprises an installation platform, a kettle body, an upper shell, a lower shell, a kettle cover, a stirring mechanism, a locking assembly and a water chiller, wherein the kettle cover is covered on the upper side of the kettle body, the stirring mechanism is used for stirring materials in the kettle body, a filtrate feeding hole and an adsorbent feeding hole are formed in the kettle cover, and a discharging hole is formed in the lower side of the kettle body; the outer side wall of the kettle body is provided with a water passing groove, a first annular water groove and a second annular water groove, the water passing groove is spiral from top to bottom, the upper end of the water passing groove is communicated with the first annular water groove, and the lower end of the water passing groove is communicated with the second annular water groove; the lower shell is covered on the lower part of the outer side wall of the kettle body in a threaded connection manner and supports the kettle body upwards, and the upper shell is covered on the upper part of the outer side wall of the kettle body; the locking assembly can press the upper shell towards the lower shell and lock and fix the upper shell and the lower shell on the mounting platform; the upper shell is provided with a first water delivery port communicated with the first annular water tank, the lower shell is provided with a second water delivery port communicated with the second annular water tank, and the first water delivery port and the second water delivery port are respectively communicated with a water outlet and a water inlet of the water cooling machine, so that water can flow in the first annular water tank, the water passing tank and the second annular water tank.
5. A low-caffeine instant tea production line according to claim 4, further comprising: the outer side wall of the kettle body is provided with an external thread, the inner side wall of the lower shell body is provided with an internal thread matched with the external thread, and the external thread and the water passing groove approximately form a double-spiral shape.
6. A low-caffeine instant tea production line according to claim 4, further comprising: the locking assembly comprises a plurality of locking bolts, a screw hole matched with the locking bolts is formed in the mounting platform, rod parts of the locking bolts can penetrate through the upper arc-shaped groove and the lower arc-shaped groove which correspond up and down and are connected in the screw hole in a locking mode, and the upper annular support and the lower annular support are clamped between the mounting platform and the heads of the locking bolts.
7. A low-caffeine instant tea production line according to claim 4, further comprising: the kettle cover is characterized in that a plurality of lifting lugs are arranged at intervals at the upper end of the kettle body, a plurality of insertion holes are formed in the lower end of the kettle cover, and the plurality of lifting lugs can be inserted into the plurality of insertion holes in a one-to-one correspondence mode when the kettle cover is arranged on the kettle body.
8. A low-caffeine instant tea production line according to claim 4, further comprising: the stirring mechanism comprises a stirring shaft, a plurality of stirring blades and a driving motor arranged on the upper side of the kettle cover, and the stirring shaft is connected to the driving end of the driving motor and extends downwards into the kettle body; the plurality of stirring blades are positioned in the kettle body and are arranged on the stirring shaft at intervals.
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| CN201921798213.8U CN210901229U (en) | 2019-10-24 | 2019-10-24 | Production line of low-caffeine instant tea |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110651863A (en) * | 2019-10-24 | 2020-01-07 | 福建安溪铁观音集团股份有限公司 | Preparation process and production line of low-caffeine instant tea |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110651863A (en) * | 2019-10-24 | 2020-01-07 | 福建安溪铁观音集团股份有限公司 | Preparation process and production line of low-caffeine instant tea |
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