CN110859233A - Production method of tea extract - Google Patents
Production method of tea extract Download PDFInfo
- Publication number
- CN110859233A CN110859233A CN201911357261.8A CN201911357261A CN110859233A CN 110859233 A CN110859233 A CN 110859233A CN 201911357261 A CN201911357261 A CN 201911357261A CN 110859233 A CN110859233 A CN 110859233A
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- CN
- China
- Prior art keywords
- tea
- extraction
- countercurrent
- extractor
- primary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 241001122767 Theaceae Species 0.000 title claims abstract description 53
- 239000000284 extract Substances 0.000 title claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000000605 extraction Methods 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000002904 solvent Substances 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims abstract description 8
- 230000008569 process Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 5
- 235000011389 fruit/vegetable juice Nutrition 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000010298 pulverizing process Methods 0.000 claims description 2
- 229940092665 tea leaf extract Drugs 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- 238000001125 extrusion Methods 0.000 abstract description 2
- 239000012466 permeate Substances 0.000 abstract description 2
- 239000000796 flavoring agent Substances 0.000 description 5
- 235000019634 flavors Nutrition 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 1
- 125000004403 catechin group Chemical group 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000003205 fragrance Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- 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
- A23F3/18—Extraction of water soluble tea constituents
-
- 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
- A23F3/163—Liquid or semi-liquid tea extract preparations, e.g. gels, liquid extracts in solid capsules
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Dispersion Chemistry (AREA)
- Tea And Coffee (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
The invention provides a production method of tea extract, which uses two continuous countercurrent extractors to carry out two-stage countercurrent extraction, and dry tea is subjected to crushing, primary extraction, filter pressing and secondary extraction. The method adopts twice countercurrent extraction, adds a filter pressing procedure between the two countercurrent extractions, further destroys the internal structure tissue of the tea by extrusion, makes the soluble substance components more easily permeate and dissolve into the solvent, uses two units for extraction, increases the concentration difference of the extracted liquid, and makes the yield of the effective components reach more than 90%.
Description
Technical Field
The invention relates to the field of tea processing, in particular to a production method of a tea extracting solution.
Background
With the understanding of people on tea and health, the application field of tea is gradually expanded, and the tea deep processing technology is mature day by day. In the process of extracting the effective components of the tea, a plurality of methods are adopted in the prior art, and the most common method is a countercurrent extraction method. The invention discloses a tea polyphenol extraction and recycling method with the application number of CN201610049481.4, and provides a continuous countercurrent extraction method, wherein tea raw materials subjected to picking and screening pretreatment are put into an extraction groove by a feeding device, move along the groove under the pushing of a scraper and a spiral mechanical force, are fully contacted with water for extraction, and are discharged after being squeezed at a discharging section; after the extraction solvent enters the extraction tank, the extraction solvent flows from high to low under the action of gravity, and the tea extract is discharged from an overflow port, namely catechin residues. The method only adopts one-time countercurrent extraction, and has low utilization rate of effective components in tea.
Disclosure of Invention
The invention provides a production method of tea extract, two-stage countercurrent extraction is carried out by two countercurrent extractors which are continuously arranged, and the utilization rate of active ingredients in tea is high.
The invention is realized by the following technical scheme:
a production method of tea extract uses two continuous countercurrent extractors to carry out two-stage countercurrent extraction, and comprises the following steps:
a) pulverizing, wherein the dried tea leaves are pulverized to 10-80 meshes;
b) primary extraction: storing the crushed tea in a storage bin, feeding the crushed tea into a primary countercurrent extractor through a quantitative mechanism, flowing to the other end of the primary countercurrent extractor under the action of a spiral push plate, and drawing out tea residue from a material and residue remover for a fixed extraction time; preheating a solvent by a preheater, adding the preheated solvent from the other end of the primary countercurrent extractor, flowing to the tea adding end, and flowing out from an overflow port;
c) and (3) filter pressing: filter-pressing the taken out tea residues through a juice extractor to form secondary tea residues;
d) and (c) secondary extraction, namely adding the secondary tea leaves into a secondary countercurrent extractor, and repeating the steps b) and c).
Preferably, the temperature of the preheater is adjustable, and the adjusting range is 50 ℃ to 90 ℃.
Preferably, in the step b), the tea extract flowing out of the overflow port is conveyed to a condensing tank, and the condensing temperature is 30 ℃.
Preferably, the total time of the two-stage countercurrent extraction is between 35 and 60 minutes and is inversely related to the extraction temperature.
Preferably, the extraction temperature of the secondary countercurrent extractor is higher than that of the primary countercurrent extractor.
Preferably, the spiral plates of the first-stage countercurrent extractor and the second-stage countercurrent extractor are all integrally formed, each spiral plate is the same in shape, the gap between each spiral plate and the cylinder wall is smaller than 5mm, a plurality of small holes are formed in each spiral plate, and the hole diameter is smaller than 5 mm.
Preferably, a sine pump is adopted at a feed inlet of the primary countercurrent extractor for spraying.
The process method adopts twice countercurrent extraction, adds a filter pressing procedure between the two countercurrent extractions, further destroys the internal structure tissue of the tea by extrusion, and makes the soluble substance components more easily permeate and dissolve into the solvent, and uses two units for extraction, thereby further increasing the concentration difference of the extracted liquid and leading the yield of the effective components to reach more than 90%.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In this embodiment, two countercurrent extraction units are designed to synthesize and extract the production line. Crushing dried tea leaves into proper granularity of about 10-80 meshes, feeding the tea leaves into a turnover storage bin, feeding the tea leaves into a countercurrent extraction machine through a quantifying mechanism, and spraying the tea leaves which just enter the machine at a feed inlet by using a sine pump so as to enable the tea leaves to sink into hot water quickly in order to prevent floating; under the action of the spiral plate, the solvent is pushed from one end to the other end, and the solvent is preheated by the preheater to the process temperature and flows to the end quantitatively from the other end, so that the whole extraction, dissolution and leaching processes form a completely opposite operation process, the extraction process obtains the maximum concentration gradient, the higher extraction yield is obtained, and the better economic benefit is obtained.
Tea leaves are extracted through the first machine groove, under the action of the spiral plate, tea leaves are slowly pushed to the tail end of the first machine groove, after being extracted in the process set time, the tea leaves are extracted through the material drawing and residue discharging device, the tea leaves are extruded through the juice extruding machine, the tea leaves enter the second machine groove after cell tissues are damaged, the tea leaves are extracted once, the internal structure tissues of the tea leaves are extruded, the tea leaves are further damaged, soluble substance components are enabled to be more easily permeated and dissolved into a solvent. Two machine sets are used for extraction, and the concentration difference of the extracted liquid is further increased. The yield of the effective components reaches more than 90 percent.
In order to prevent the color and flavor of the extract from being damaged, the embodiment of the invention also provides some preferable schemes:
1. the extraction temperature is lower than a proper value and can be adjusted at 50-90 ℃.
2. The extraction time is shorter, and is adjustable within 35-60 minutes.
3. The liquid is fed in two stages, so that the temperature of the extracting solution is doubled, the extracting solution is subjected to heat exchange and cooled to about 30 ℃ immediately after being filtered, and the secondary steam is rapidly condensed by enlarging and adding a channel for the secondary steam of a condenser, thereby being an important measure for keeping the flavor.
4. Optimizing a countercurrent extractor: the spiral plates are molded and manufactured, each spiral plate is pressed into the same shape, the gap between each spiral plate and the cylinder wall is reduced, and the gap is ensured to be less than 5mm or about 5 mm; the aperture of the spiral plate is properly reduced, so that the tea leaves are pushed forward as much as possible in the extraction process, and the tea leaves are reduced from remaining in the machine groove. Prolonged exposure to heat is also a major cause of flavor impact.
5. When the extraction time is 50 minutes, the yield is 400Kg, and in order to make the flavor and color better, the extraction temperature is reduced to 65 ℃ and the extraction time is prolonged to 60 minutes. When the extraction time is (15 × 2) min, the temperature can be raised to 85 deg.C, and the extract can be cooled immediately after 15 min to ensure constant flavor, fragrance and color, and yield. Or the temperature difference extraction method can be implemented by using a first machine tank with a lower temperature and a second machine tank with a higher temperature. The temperature, extraction time and solvent amount can be properly adjusted according to the process requirements, and the optimal extraction effect can be achieved. The yield of the product can also be improved by properly increasing the solvent amount.
In the preferred embodiment of the invention, the pressure of the filter pressing is generally selected to be 0.5-0.7MPa, and the time is controlled to be about 5-8 minutes.
In the preferred embodiment of the present invention, the solvent is typically demineralized water.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A production method of tea extract is characterized in that two-stage countercurrent extraction is carried out by two countercurrent extractors which are continuously arranged, and comprises the following steps:
a) pulverizing, wherein the dried tea leaves are pulverized to 10-80 meshes;
b) primary extraction: storing the crushed tea in a storage bin, feeding the crushed tea into a primary countercurrent extractor through a quantitative mechanism, flowing to the other end of the primary countercurrent extractor under the action of a spiral push plate, and drawing out tea residue from a material and residue remover for a fixed extraction time; preheating a solvent by a preheater, adding the preheated solvent from the other end of the primary countercurrent extractor, flowing to the tea adding end, and flowing out from an overflow port;
c) and (3) filter pressing: filter-pressing the taken out tea residues through a juice extractor to form secondary tea residues;
d) and (c) secondary extraction, namely adding the secondary tea leaves into a secondary countercurrent extractor, and repeating the steps b) and c).
2. The method of claim 1, wherein the temperature of the preheater in step b) is adjustable within a range of 50 ℃ to 90 ℃.
3. The method for producing tea extract according to claim 1, wherein in the step b), the tea extract flowing out of the overflow port is transferred to a condensing tank, and the condensing temperature is 30 ℃.
4. A process as claimed in claim 1 wherein the total time of the two stages of counter current extraction is from 35 to 60 minutes and is inversely related to the extraction temperature.
5. The method of claim 1, wherein the secondary counter-current extractor extracts at a temperature higher than the primary counter-current extractor.
6. The method for producing tea leaf extract as claimed in claim 1, wherein the spiral plates of the first stage counter-current extractor and the second stage counter-current extractor are integrally formed, each spiral plate has the same shape, the gap between the spiral plate and the wall of the barrel is less than 5mm, and the spiral plate is provided with a plurality of small holes with a diameter of less than 5 mm.
7. The method of claim 1, wherein the feeding port of the primary counter-current extractor is sprayed with a sine pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911357261.8A CN110859233A (en) | 2019-12-25 | 2019-12-25 | Production method of tea extract |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911357261.8A CN110859233A (en) | 2019-12-25 | 2019-12-25 | Production method of tea extract |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110859233A true CN110859233A (en) | 2020-03-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911357261.8A Pending CN110859233A (en) | 2019-12-25 | 2019-12-25 | Production method of tea extract |
Country Status (1)
| Country | Link |
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| CN (1) | CN110859233A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111772009A (en) * | 2020-06-30 | 2020-10-16 | 湖北采花茶业有限公司 | Method for preparing instant black tea by using green tea dust |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2112624A (en) * | 1982-01-05 | 1983-07-27 | Unilever Plc | Extracting plant material |
| CN101385492A (en) * | 2008-10-16 | 2009-03-18 | 深圳市深宝华城食品有限公司 | Instant tea powder and processing method thereof |
| CN102657271A (en) * | 2012-04-28 | 2012-09-12 | 江南大学 | Automatic multi-stage countercurrent extraction method of tea infusion |
| CN202890381U (en) * | 2012-11-06 | 2013-04-24 | 易晓食品(衢州)有限公司 | Tea water countercurrent extraction system device |
| CN203861958U (en) * | 2014-04-08 | 2014-10-08 | 浙江茗皇天然食品开发有限公司 | Horizontal reversed current tea leaves extracting device |
-
2019
- 2019-12-25 CN CN201911357261.8A patent/CN110859233A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2112624A (en) * | 1982-01-05 | 1983-07-27 | Unilever Plc | Extracting plant material |
| CN101385492A (en) * | 2008-10-16 | 2009-03-18 | 深圳市深宝华城食品有限公司 | Instant tea powder and processing method thereof |
| CN102657271A (en) * | 2012-04-28 | 2012-09-12 | 江南大学 | Automatic multi-stage countercurrent extraction method of tea infusion |
| CN202890381U (en) * | 2012-11-06 | 2013-04-24 | 易晓食品(衢州)有限公司 | Tea water countercurrent extraction system device |
| CN203861958U (en) * | 2014-04-08 | 2014-10-08 | 浙江茗皇天然食品开发有限公司 | Horizontal reversed current tea leaves extracting device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111772009A (en) * | 2020-06-30 | 2020-10-16 | 湖北采花茶业有限公司 | Method for preparing instant black tea by using green tea dust |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200306 |
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