CN105285179A - Boiling water enzyme deactivating method of fresh tea leaf - Google Patents
Boiling water enzyme deactivating method of fresh tea leaf Download PDFInfo
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- CN105285179A CN105285179A CN201510806140.2A CN201510806140A CN105285179A CN 105285179 A CN105285179 A CN 105285179A CN 201510806140 A CN201510806140 A CN 201510806140A CN 105285179 A CN105285179 A CN 105285179A
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Abstract
The invention relates to a boiling water enzyme deactivating method of fresh tea leaf, and belongs to the technical field of tea processing. The method comprises three steps: fresh tea leaf picking and transportation, boiling water enzyme deactivation, and spray cooling. Specifically the method comprises the following steps: picking fresh tea leaves, delivering the picked fresh tea leaves to a boiling and blanching machine by a material delivering machine; adding water into the boiling and blanching machine according to a ratio of fresh tea leaf to water of 1:0.9-1.1, then carrying out enzyme deactivation at a temperature of 90 to 100 DEG C for 115 to 125 seconds, wherein the speed of enzyme deactivation is 1.0 to 1.5 r/min, water is supplemented for every 20 seconds, and the added water accounts for 0.5 to 0.8% of the weight of the fresh tea leaves for each time; and immediately spray-cooling the obtained tea by a spray-cooling machine. The provided method has the advantages that the operation is simple, and the pesticide residue can be effectively removed. An energy-saving, high efficient and environment-friendly enzyme deactivating technology is provided for tea deep processing and effective component extraction of fresh tea leaf. The method has a wide application prospect.
Description
Technical field
The invention belongs to Tea Processing technical field, be specifically related to a kind of boiling water fixing method of tea fresh leaves.
Background technology
Completing is the critical process of green tea shape and quality responses.Complete mode: fried green, steaming green grass or young crops, baking, bubble green grass or young crops, radiation complete.Ge Chancha state of the current world generally uses as fried green method.
Conventional process techniques drum-type machine completes and adopts stove fire directly to heat the cylindrical shell of rotation, and tealeaves to be thrown turn by the centrifugal force of friction and barrel body rotation in cylindrical shell in cylinder, and absorbs heat and reach the object that completes.The shortcoming of the method is: the first, and tealeaves in cylinder drains by fan by this machine, has a large amount of dust and is discharged in air, to environment; The second, in the process that completes, tealeaves constantly can make tealeaves fragmentation with cylindrical shell friction, and cause wastage of material, product quality is not high; 3rd, drums inside is easy to clean not, easily causes secondary pollution, affects product quality.Therefore how overcoming the deficiencies in the prior art is problems that current Tea Processing technical field needs solution badly.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, provide a kind of boiling water fixing method of tea fresh leaves of energy-conservation, efficient, environmental protection, the method, while guarantee material quality, reduces production cost, shortens the production time.
Except as otherwise noted, percentage of the present invention is percetage by weight.
The technical solution used in the present invention is as follows:
A boiling water fixing method for tea fresh leaves, comprises the following steps:
Step (1), the harvesting of tea fresh leaves and conveying: after tea fresh leaves is plucked, send in boiling blanching machine with material conveyor by tea fresh leaves;
Step (2), boiling water completes: compare for 1:0.9-1.1 by tea fresh leaves and water quality, water is joined in boiling blanching machine, complete 115-125s at 90 DEG C-100 DEG C, and the speed completed is 1.0-1.5r/min, simultaneously, in the process of completing, every 20s, add a water in boiling blanching machine, the quality at every turn adding water is the 0.5-0.8% of tea fresh leaves quality;
Step (3), spraying cooling: the tealeaves spraying cooler obtained that completes through step (2) boiling water is carried out spray-chilling to room temperature, namely completes and complete;
The method of described spray-chilling is that every 2-3min sprays once, each 10-20s, and spray-water temperature is 8-10 DEG C;
The spray pressure of described spray-chilling is 0.15-0.2MPa, and flow is 8-10L/h.
Further, the material conveyor preferably described in step (1) is mesh bag material conveyor.
Further, preferably step (2) is 1:1 by tea fresh leaves with completing with water quality ratio, and joined by water in boiling blanching machine, complete 120s at 90 DEG C, and the speed completed is 1.2r/min.
Further, preferably, step (2) is 1:1 by tea fresh leaves with completing with water quality ratio, and joined by water in boiling blanching machine, complete 120s at 95 DEG C, and the speed completed is 1.5r/min.
Further, preferably, the method for the spray-chilling described in step (3) is that every 2.5min sprays once, each 15s, and spray-water temperature is 9 DEG C; The spray pressure of described spray-chilling is 0.17MPa, and flow is 9L/h.
Further, preferably, the method for the described spray-chilling described in step (3) is that every 2.8min sprays once, each 12s, and spray-water temperature is 8-10 DEG C; The spray pressure of described spray-chilling is 0.17MPa, and flow is 8.8L/h.
relative to prior art, the present invention has following remarkable advantage:
1, the boiling water adopted in the present invention completes and spraying cooling all can take away impurity and the pesticide residue on tealeaves surface, greatly improves the quality of products.
When 2, completing in the present invention adopt water temperature and the time be fixing, allow all materials by same treatment method, products quality guarantee, avoid baking complete and roller fixation time, the uncontrollability of the temperature that completes and fixation time.
3, the present invention is completed by boiling water, and the tealeaves that makes to complete limbers up, and increases water content of tea, is convenient to follow-up defibrination and extracts, reduce mechanical wear, ensure recovery rate.
4, the present invention adopts spraying cooler to complete the rapid spraying cooling of tealeaves obtained to boiling water, can at utmost retain tealeaves inclusion, keep the CF of tealeaves, well retain the original fragrance of tealeaves and fresh tasty and refreshing sense simultaneously.
5, the inventive method can be produced by continuous-flow type, and economize energy, efficiency is high.
6, the inventive method 80% production water outlet direct reuse is to producing, and the sewage concentration liquid of other 20% water outlet reuse 15%, 5% after advanced treating directly burns, and whole production technology achieves zero-emission, and protection of the environment and saving water resource, reduce costs.
7, method of operating of the present invention is simple, to operating personnel without special technical requirement.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
It will be understood to those of skill in the art that the following example only for illustration of the present invention, and should not be considered as limiting scope of the present invention.Unreceipted concrete technology or condition person in embodiment, according to the technology described by the document in this area or condition or carry out according to product description.Agents useful for same or the unreceipted production firm person of instrument, being can by buying the conventional products obtained.
Embodiment 1
A boiling water fixing method for tea fresh leaves, comprises the following steps:
Step (1), the harvesting of tea fresh leaves and conveying: after tea fresh leaves is plucked, get tea fresh leaves 87.8kg material conveyor and sent into by tea fresh leaves in boiling blanching machine;
Step (2), boiling water completes: be 1:1 by tea fresh leaves with completing with water quality ratio, and joined by water in boiling blanching machine, complete 120s at 90 DEG C, and the speed completed is 1.2r/min;
Step (3), spraying cooling: the tealeaves spraying cooler obtained that completes through step (2) boiling water is carried out spray-chilling to room temperature, namely completes and complete;
The method of described spray-chilling is that every 2min sprays once, each 10s, and spray-water temperature is 8 DEG C;
The spray pressure of described spray-chilling is 0.15MPa, and flow is 8L/h.
Embodiment 2
A boiling water fixing method for tea fresh leaves, comprises the following steps:
Step (1), the harvesting of tea fresh leaves and conveying: after tea fresh leaves is plucked, get tea fresh leaves 100kg material conveyor and sent into by tea fresh leaves in boiling blanching machine;
Step (2), boiling water completes: be 1:1 by tea fresh leaves with completing with water quality ratio, and joined by water in boiling blanching machine, complete 120s at 95 DEG C, and the speed completed is 1.5r/min;
Step (3), spraying cooling: the tealeaves spraying cooler obtained that completes through step (2) boiling water is carried out spray-chilling to room temperature, namely completes and complete;
The method of described spray-chilling is that every 3min sprays once, each 20s, and spray-water temperature is 10 DEG C;
The spray pressure of described spray-chilling is 0.2MPa, and flow is 10L/h.
Embodiment 3
A boiling water fixing method for tea fresh leaves, comprises the following steps:
Step (1), the harvesting of tea fresh leaves and conveying: after tea fresh leaves is plucked, get tea fresh leaves 92.5kg material conveyor and sent into by tea fresh leaves in boiling blanching machine;
Step (2), boiling water completes: be 1:0.9 by tea fresh leaves with completing with water quality ratio, and joined by water in boiling blanching machine, complete 115s at 96 DEG C, and the speed completed is 1.0r/min;
Step (3), spraying cooling: the tealeaves spraying cooler obtained that completes through step (2) boiling water is carried out spray-chilling to room temperature, namely completes and complete;
The method of described spray-chilling is that every 2.5min sprays once, each 15s, and spray-water temperature is 9 DEG C;
The spray pressure of described spray-chilling is 0.17MPa, and flow is 9L/h.
Embodiment 4
A boiling water fixing method for tea fresh leaves, comprises the following steps:
Step (1), the harvesting of tea fresh leaves and conveying: after tea fresh leaves is plucked, get tea fresh leaves 95kg material conveyor and sent into by tea fresh leaves in boiling blanching machine;
Step (2), boiling water completes: be 1:1.1 by tea fresh leaves with completing with water quality ratio, and joined by water in boiling blanching machine, complete 125s at 100 DEG C, and the speed completed is 1.3r/min;
Step (3), spraying cooling: the tealeaves spraying cooler obtained that completes through step (2) boiling water is carried out spray-chilling to room temperature, namely completes and complete;
The method of described spray-chilling is that every 2.8min sprays once, each 12s, and spray-water temperature is 8-10 DEG C;
The spray pressure of described spray-chilling is 0.17MPa, and flow is 8.8L/h.
detect
Embodiment 1-embodiment 4 of learning from else's experience method obtains tealeaves as sample, and get traditional tealeaves that baking completes, roller fixation obtains as sample, carry out each active principle, the residual detection of agriculture by national standard, testing result as shown in Table 1 and Table 2 simultaneously.
The every active principle testing result of above embodiment and conventional method comparative result are in table 1.
Table 1
Table 2
| Complete mode | Enzyme inhibition rate, % | The residual clearance of agriculture, % |
| The tea fresh leaves do not completed | 41% | - |
| Embodiment 1 | 8% | 80.49 |
| Embodiment 2 | 8% | 80.49 |
| Embodiment 3 | 8.2% | 80 |
| Embodiment 4 | 8.1% | 80.24 |
| Baking completes | 37% | 9.76 |
| Roller fixation | 35% | 14.63 |
As seen from the results in Table 1: boiling water completes compared with the mode that to complete with tradition, and in the tealeaves that completes, tea polysaccharide, Tea Polyphenols and theanine content are more or less the same.But caffeine content obviously reduces, caffeine content can be reduced 45%-50% by the present invention, due to certain sensitive crowds such as caffeine is languisher for partial nerve, pregnant woman, the elderly, children, after drinking the tealeaves containing higher caffeine content, insomnia, impatient, uncomfortable or other symptom can be caused.Therefore, fixing method of the present invention contributes to the problem of drinking tea solving certain sensitive crowd, significant to expansion Tea Consumption market.
According to national Specification, enzyme inhibition rate should more than 50%, and be more than or equal to this numerical value, genus exceeds standard.Inhibiting rate is lower, and agriculture is residual lower.In table 2, the tea enzyme that completes inhibiting rate does not all exceed standard, but tea fresh leaves middle peasant is residual the highest, and the tealeaves agriculture after boiling water completes is residual minimum, and the residual clearance of agriculture is 80.49% compared with tea fresh leaves.Prove that boiling water completes and effectively can remove the residues of organophosphate pesticides on tealeaves surface.Meanwhile, the tealeaves that the residual clearance of the agriculture of embodiment of the present invention product completes higher than traditional baking all far away, roller fixation obtains.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (6)
1. a boiling water fixing method for tea fresh leaves, is characterized in that, comprise the following steps:
Step (1), the harvesting of tea fresh leaves and conveying: after tea fresh leaves is plucked, send in boiling blanching machine with material conveyor by tea fresh leaves;
Step (2), boiling water completes: compare for 1:0.9-1.1 by tea fresh leaves and water quality, water is joined in boiling blanching machine, complete 115-125s at 90 DEG C-100 DEG C, and the speed completed is 1.0-1.5r/min, simultaneously, in the process of completing, every 20s, add a water in boiling blanching machine, the quality at every turn adding water is the 0.5-0.8% of tea fresh leaves quality;
Step (3), spraying cooling: the tealeaves spraying cooler obtained that completes through step (2) boiling water is carried out spray-chilling to room temperature, namely completes and complete;
The method of described spray-chilling is that every 2-3min sprays once, each 10-20s, and spray-water temperature is 8-10 DEG C;
The spray pressure of described spray-chilling is 0.15-0.2MPa, and flow is 8-10L/h.
2. the boiling water fixing method of tea fresh leaves according to claim 1, is characterized in that, the material conveyor described in step (1) is mesh bag material conveyor.
3. the boiling water fixing method of tea fresh leaves according to claim 1, is characterized in that, step (2) is 1:1 by tea fresh leaves with completing with water quality ratio, and joined by water in boiling blanching machine, complete 120s at 90 DEG C, and the speed completed is 1.2r/min.
4. the boiling water fixing method of tea fresh leaves according to claim 1, is characterized in that, step (2) is 1:1 by tea fresh leaves with completing with water quality ratio, and joined by water in boiling blanching machine, complete 120s at 95 DEG C, and the speed completed is 1.5r/min.
5. the boiling water fixing method of tea fresh leaves according to claim 1, is characterized in that, the method for the spray-chilling described in step (3) is that every 2.5min sprays once, each 15s, and spray-water temperature is 9 DEG C; The spray pressure of described spray-chilling is 0.17MPa, and flow is 9L/h.
6. the boiling water fixing method of tea fresh leaves according to claim 1, is characterized in that, the method for the described spray-chilling described in step (3) is that every 2.8min sprays once, each 12s, and spray-water temperature is 8-10 DEG C; The spray pressure of described spray-chilling is 0.17MPa, and flow is 8.8L/h.
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| CN201510806140.2A CN105285179A (en) | 2015-11-20 | 2015-11-20 | Boiling water enzyme deactivating method of fresh tea leaf |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107912576A (en) * | 2017-12-06 | 2018-04-17 | 王占菊 | The production method of rheum officinale tea |
| CN108094615A (en) * | 2017-12-12 | 2018-06-01 | 巫山县德林旅游开发有限公司 | A kind of wild forsythia leaf tea production method |
Citations (7)
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| CN1078100A (en) * | 1987-07-07 | 1993-11-10 | 广西壮族自治区桂林茶叶研究所 | A kind of manufacture method of broken green tea |
| CN2389481Y (en) * | 1999-09-03 | 2000-08-02 | 中国农业科学院茶叶研究所 | Tea caffeine removing machine |
| CN101189991A (en) * | 2006-11-20 | 2008-06-04 | 尹福生 | Preparation method of low-caffeine green tea |
| CN101449716A (en) * | 2007-12-09 | 2009-06-10 | 王世清 | Fresh tea caffeine removing device |
| CN102726554A (en) * | 2012-06-30 | 2012-10-17 | 中国农业科学院茶叶研究所 | Preparation method of low-caffeine green tea, low-caffeine green tea and tea product of low-caffeine green tea |
| CN104222341A (en) * | 2014-09-12 | 2014-12-24 | 周望 | Method and device for preparing green tea by adopting boiling fixation manner and green tea prepared by using method and device |
| CN204047864U (en) * | 2014-09-12 | 2014-12-31 | 周望 | The poach mode of completing is adopted to prepare the device of green tea |
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2015
- 2015-11-20 CN CN201510806140.2A patent/CN105285179A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1078100A (en) * | 1987-07-07 | 1993-11-10 | 广西壮族自治区桂林茶叶研究所 | A kind of manufacture method of broken green tea |
| CN2389481Y (en) * | 1999-09-03 | 2000-08-02 | 中国农业科学院茶叶研究所 | Tea caffeine removing machine |
| CN101189991A (en) * | 2006-11-20 | 2008-06-04 | 尹福生 | Preparation method of low-caffeine green tea |
| CN101449716A (en) * | 2007-12-09 | 2009-06-10 | 王世清 | Fresh tea caffeine removing device |
| CN102726554A (en) * | 2012-06-30 | 2012-10-17 | 中国农业科学院茶叶研究所 | Preparation method of low-caffeine green tea, low-caffeine green tea and tea product of low-caffeine green tea |
| CN104222341A (en) * | 2014-09-12 | 2014-12-24 | 周望 | Method and device for preparing green tea by adopting boiling fixation manner and green tea prepared by using method and device |
| CN204047864U (en) * | 2014-09-12 | 2014-12-31 | 周望 | The poach mode of completing is adopted to prepare the device of green tea |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107912576A (en) * | 2017-12-06 | 2018-04-17 | 王占菊 | The production method of rheum officinale tea |
| CN108094615A (en) * | 2017-12-12 | 2018-06-01 | 巫山县德林旅游开发有限公司 | A kind of wild forsythia leaf tea production method |
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