CN105028726A - Selenium-enriched green tea production process - Google Patents
Selenium-enriched green tea production process Download PDFInfo
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- CN105028726A CN105028726A CN201510532020.8A CN201510532020A CN105028726A CN 105028726 A CN105028726 A CN 105028726A CN 201510532020 A CN201510532020 A CN 201510532020A CN 105028726 A CN105028726 A CN 105028726A
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- 244000269722 Thea sinensis Species 0.000 title claims abstract description 45
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 229910052711 selenium Inorganic materials 0.000 title claims abstract description 24
- 239000011669 selenium Substances 0.000 title claims abstract description 24
- 235000009569 green tea Nutrition 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 93
- 238000003892 spreading Methods 0.000 claims abstract description 93
- 230000007480 spreading Effects 0.000 claims abstract description 93
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 235000013616 tea Nutrition 0.000 claims abstract description 31
- 238000001035 drying Methods 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 14
- 239000003205 fragrance Substances 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 238000009835 boiling Methods 0.000 claims description 29
- 206010053615 Thermal burn Diseases 0.000 claims description 13
- 238000009960 carding Methods 0.000 claims description 9
- 238000005516 engineering process Methods 0.000 claims description 8
- 244000025254 Cannabis sativa Species 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 6
- 238000009461 vacuum packaging Methods 0.000 claims description 3
- 238000003306 harvesting Methods 0.000 claims description 2
- 230000036541 health Effects 0.000 abstract description 2
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- 235000014036 Castanea Nutrition 0.000 abstract 1
- 230000002860 competitive effect Effects 0.000 abstract 1
- 244000062793 Sorghum vulgare Species 0.000 description 9
- 239000004744 fabric Substances 0.000 description 9
- 235000019713 millet Nutrition 0.000 description 9
- 238000007599 discharging Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 8
- 239000007789 gas Substances 0.000 description 8
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- BGOFCVIGEYGEOF-UJPOAAIJSA-N helicin Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@H]1OC1=CC=CC=C1C=O BGOFCVIGEYGEOF-UJPOAAIJSA-N 0.000 description 3
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- 238000010943 off-gassing Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a selenium-enriched green tea production process. The production process comprises the steps of spraying an organic selenium solution to the surfaces of tea leaves through a spraying device at the initial stage of fifth stage of cooling until the water content of the tea leaves is increased to be 30%-35%, after the fifth stage of cooling, putting the tea leaves into a second drying device for second-stage drying processing, and after the second-stage drying processing, spreading the tea leaves on a sixth cooling device at room temperature for sixth stage of cooling for 30-35min, wherein the second-stage drying process comprises the steps of drying for 8-10min at 100-105 DEG C, and then drying at 85-90 DEG C until the water content of the tea leaves is reduced to be 5% or below. According to the green tea prepared by the process, the tea strips are unfolded and smooth, the color is dark green and bright, the green tea has chestnut fragrance, and has rich fragrance, the tea soup is dark green and bright, and is mellow and fresh, and the green tea is rich in organic selenium, thus being a competitive product in health green tea.
Description
Technical field
The present invention relates to Tea Production apparatus field, be specifically related to a kind of selenium-rich green tea production technology.
Background technology
Yuexi abounds with green tea, wherein famous with Yuexi Cuilan tea, and there are the following problems in current Yuexi Cuilan tea production:
1, because Urbanization Construction is implemented and the discharge of industrial waste gas, boundless and indistinct in air have a large amount of dusts and harmful substance, these harmful substances meeting sedimentation is attached on the surface of tea tree tender leaf, tender leaf is directly processed after being plucked, and people do not carry out cleaning (specialty sample tea except), therefore a large amount of harmful substance is drunk.At present, scald green grass or young crops and operate in the new process for processing of Yuexi Cuilan tea by adopting, to wash away the harmful substance on tealeaves surface, but boiling hot blue or green equipment used at present also cannot realize the abundant cleaning of tealeaves and tealeaves to carry out evenly scalding blue or green.
2, in modern streamline Tea Production system, general employing cylinder completes to tealeaves, but easily there is the phenomenon of complete uneven, red stalk, Jiao Bianjiaoye in roller fixation, affect the quality of finished tea, also the technique adopting microwave de-enzyming to carry out alternative roller fixation is had, although microwave de-enzyming is even, but the brewed millet paste of its obtained finished tea is not as the mellow of roller fixation and freshly feel well, that is the poor quality of millet paste, be therefore necessary to take into account both that improve tea product and millet paste and a kind of mode that completes newly is provided.
Summary of the invention
Object of the present invention is just to provide a kind of selenium-rich green tea production technology, and it at least effectively can solve an above-mentioned problem, promotes the quality of tealeaves.
A kind of selenium-rich green tea production technology, comprises the following steps:
Spread: the fresh leaf of the first exhibition of harvesting is positioned over spread on device and carries out spreading until tealeaves color starts to turn dark, spread in process and stir fresh leaf;
Scald blue or green: the tealeaves after spreading is dropped into boiling hot blue or green process 50 ~ 55s in boiling hot blue or green device, and controlling hot water temperature is 95 ~ 98 DEG C, after boiling hot green grass or young crops, tea leaf conveying is delivered to airing device and dries;
One-level completes: after drying, tealeaves is put into roller fixation machine 130 ~ 140 DEG C of one-levels and to complete process 1.5 ~ 2min;
Spreading for cooling: the tealeaves after one-level being completed is put on the first spreading for cooling device, room temperature one-level spreading for cooling 5 ~ 10min;
Secondary completes: the tea leaf conveying after spreading for cooling is delivered to microwave green-killing device and carry out secondary and complete, secondary fixation time 1.2 ~ 1.25min, is placed in room temperature secondary spreading for cooling 5 ~ 8min on the second spreading for cooling device and recovers by tealeaves after secondary completes;
Reason bar: after secondary spreading for cooling, tealeaves is placed in the first carding machine and carries out one-level reason bar, the temperature of one-level reason bar is 50 ~ 60 DEG C, time 2 ~ 2.5min, one-level reason article to terminate rear room temperature and spreads carry out three grades of spreadings for cooling on the 3rd spreading for cooling device, three grades of spreading for cooling times are 5 ~ 8min, after three grades of spreadings for cooling, tealeaves is placed in the second carding machine and carries out secondary reason bar, the temperature of secondary reason bar is 40 ~ 50 DEG C, time 1 ~ 1.5min, secondary reason article to terminate rear room temperature and spreads carry out level Four spreading for cooling on the 4th spreading for cooling device, and the level Four spreading for cooling time is 8 ~ 10min;
Dry: after level Four spreading for cooling, tealeaves is placed in the first drying unit and carries out one-level oven dry, the temperature that one-level is dried is 100 ~ 105 DEG C, one-level oven dry reduces to less than 25% to tealeaves moisture content, one-level is dried and is terminated rear room temperature and spread carry out Pyatyi spreading for cooling on the 5th spreading for cooling device, the Pyatyi spreading for cooling time is 20 ~ 25min, initial stage of Pyatyi spreading for cooling is upgraded to 30 ~ 35% by flusher to tealeaves surface spraying Organic Selenium solution to the moisture content of tealeaves, after Pyatyi spreading for cooling, tealeaves is placed in the second oven dry and carries out secondary drying and processing, secondary drying and processing terminates rear room temperature and spreads carry out six grades of spreadings for cooling on the 6th spreading for cooling device, six grades of spreading for cooling times are 30 ~ 35min, secondary drying and processing is: first 100 ~ 105 DEG C of drying and processing 8 ~ 10min, and then 85 ~ 90 DEG C of oven dry to tealeaves moisture content reduce to less than 5%,
Slaking: after oven dry, tealeaves is placed in refrigerating chamber 1 ~ 3 DEG C refrigeration slaking 1 month;
Titian: the tealeaves after refrigeration slaking is put into fragrance extracting machine 80 ~ 85 DEG C of Titian 30 ~ 35min, and Titian terminates rear cooling and vacuum packaging.
In technique scheme, by being used in conjunction of microwave green-killing device and roller fixation device, when scalding blue or green, cleaning is carried out to tealeaves and elementary completing carries out fixation; Roller fixation carries out one-level and completes shaping for tea aroma and promote non-enzymatic chemical reaction, promotes millet paste quality, makes millet paste mellow, fresh refreshing, makes tealeaves develop into Li Xiang simultaneously; Microwave de-enzyming carries out secondary and completes, and carries look and Bao Se for tealeaves, make the color of finished tea dark green, moisten bright.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of microwave de-enzyming machine;
Fig. 3 is the structural representation of boiling hot blue or green machine;
Fig. 4 is the structural representation of hot-water line;
Fig. 5 is the structural representation of boiling hot blue or green carrier pipe;
Fig. 6 is the schematic diagram of foraminous conveyer feed end;
Fig. 7 is inner bellows structural representation;
Fig. 8 is the schematic diagram of foraminous conveyer discharge end;
Fig. 9 is the structural representation of cloth materials and parts;
Figure 10 is that hot water circuit utilizes schematic diagram.
Detailed description of the invention
In order to make objects and advantages of the present invention clearly understand, below in conjunction with embodiment, the present invention is specifically described.Should be appreciated that following word only in order to describe one or more concrete embodiments of the present invention, considered critical is not carried out to the protection domain that the present invention specifically asks." heart yearn " described below all refers to the center line of these parts.
The invention provides a kind of selenium-rich green tea production equipment, as shown in Figure 1, comprise sequentially before and after be connected spread device G1 for what spread tealeaves, blue or green boiling hot blue or green device 10 is scalded for carrying out tealeaves, for the airing device 20 dried tealeaves, for carrying out the roller fixation device G2 that one-level completes to tealeaves, for carrying out the first spreading for cooling device T1 of one-level spreading for cooling to tealeaves, for carrying out the microwave green-killing device W10 that secondary completes to tealeaves, for carrying out the second spreading for cooling device T2 of secondary spreading for cooling to tealeaves, for carrying out the first carding machine G3 of one-level reason bar to tealeaves, for carrying out the 3rd spreading for cooling device T3 of three grades of spreadings for cooling to tealeaves, for carrying out the second carding machine G4 of secondary reason bar to tealeaves, for carrying out the 4th spreading for cooling device T4 of level Four spreading for cooling to tealeaves, for carrying out the first drying unit G5 of one-level oven dry to tealeaves, for carrying out the 5th spreading for cooling device T5 of Pyatyi spreading for cooling to tealeaves, for carrying out the second drying unit G6 of secondary oven dry to tealeaves, for carrying out the 6th spreading for cooling device T6 of six grades of spreadings for cooling to tealeaves, for carrying out the refrigerating chamber G7 refrigerating slaking to tealeaves, and for carrying out the fragrance extracting machine G8 of Titian to tealeaves, first, second, third and fourth, five, six spreading for cooling devices be bamboo sieve form, 5th spreading for cooling device T5 is positioned on spreading for cooling table top, the top of spreading for cooling table top is provided with the flusher G9 for spraying Organic Selenium solution to tealeaves, and flusher G9 is connected with Organic Selenium solution reservoir G91.Roller fixation device G2, first and second carding machine, first and second drying unit, fragrance extracting machine, refrigerating chamber all can adopt the existing tea machine equipment with identical function to use, and between neighboring devices, tealeaves conveying can adopt conveyer belt and/or manually transport; Flusher G8 adopts general sprayer unit, makes Organic Selenium solution can uniformly spray surface at tealeaves.By being used in conjunction of microwave green-killing device W10 and roller fixation device G2, when scalding blue or green, cleaning being carried out to tealeaves and elementaryly to complete, fixation is carried out to tealeaves; The roller fixation one-level of carrying out in short-term completes shaping for tea aroma and promotes non-enzymatic chemical reaction, promotes millet paste quality, makes millet paste mellow, fresh refreshing, makes tealeaves odor type develop into Li Xiang shape simultaneously; Microwave de-enzyming carries out secondary and completes, and carries look and Bao Se for tealeaves, make the color of finished tea dark green, moisten bright.Microwave green-killing device specifically adopts as shown in Figure 2, comprise the 3rd casing and run through the 3rd casing carries out horizontal feed the 3rd conveyer belt W11 to tealeaves, horizontally disposed air gathering plate W13 and air distribution plate W14 is provided with in 3rd casing, air gathering plate W13 and air distribution plate W14 is placed in the upper of the 3rd conveyer belt W11, downside, air gathering plate W13 and air distribution plate W14 is orifice plate and forms, microwave generator W12 is provided with between 3rd conveyer belt W11 and air distribution plate W14, the upper roof of the 3rd casing and lower diapire arrange collection air port W15 and air outlet W16 respectively, be connected by air delivery pipe between collection air port W15 and air outlet W16, air delivery pipe is provided with dehumidifier and the 3rd blower fan.Due to when microwave de-enzyming, the moisture in tealeaves can distribute, and is therefore extracted to remove by the steam of generation by arranging the 3rd blower fan, simultaneously by dried hot-air delivering in the 3rd casing, economize energy and promote the dehydration rate of tealeaves.Microwave generator W12 is arranged between the 3rd conveyer belt W11 and air distribution plate W14 in addition, steam can be avoided the impact of circuit, guarantee equipment reliability of operation and increasing the service life, the 3rd conveyer belt W11 selects the plastics guipure of food-grade to form, avoids absorbing microwave and guarantee food security.
Scald blue or green device 10 as Fig. 3, shown in 4, comprising vertical shape arranges for adding the hopper 12 of tealeaves and installing the frame 11 of hopper 12, internal face at the bottom of the bucket of hopper 12 is hemispheric arcwall face, the center of curvature of arcwall face is positioned at hopper oral area side, the lowest part of arcwall face is provided with discharging interface 122a, hopper 12 rotates around its heart yearn and is fixed in frame 11, hopper 12 is connected with its first driving mechanism carrying out rotating of driving, the oral area of hopper 12 is provided with hot-water line 121, hot-water line 121 is that the body of inverted cone zigzag shape is formed, the lower end of hot-water line 121 is shutoff shape, the hypomere of hot-water line 121 to be plugged in hopper 12 and hot-water line 121 be positioned at hopper 12 pipe shaft on interval set out water hole 121a, the water outlet direction of apopore 121a is the interior sidewall surface pointing to hopper 12 obliquely, the downside of hopper 12 is provided with boiling hot blue or green carrier pipe 13, the upper end and the discharging interface 122a that scald blue or green carrier pipe 13 form to be rotatably assorted around the heart yearn of hopper 12 and are connected, boiling hot blue or green carrier pipe 13 and hot-water line 121 are fixed in frame, the upper end of hot-water line 121 is connected with hot-water cylinder and is connected, adjacent upper on hot-water line 121, lower two-layer apopore 121a is that interleaved shape is arranged.
Scald in blue or green device 10 by tealeaves being dropped in hopper 12, because the first driving mechanism drives hopper 12 together to rotate, the tealeaves fallen into like this in hopper 12 will enter boiling hot blue or green carrier pipe 13 with hot water is together spiral helicine from discharging interface 122a outflow, tealeaves can not be detained in hopper 12, ensure that all tealeaves can enter boiling hot blue or green carrier pipe 13 fast, the every sheet tealeaves entering boiling hot blue or green carrier pipe 13 is all surrounded by hot water and evenly carries out scalding green grass or young crops, thus improve boiling hot blue or green effect and shorten the boiling hot blue or green time, above-mentioned boiling hot blue or green machine is adopted to carry out scalding green grass or young crops to tealeaves, the time that tealeaves scalds green grass or young crops only needs 50 ~ 60s, avoid tealeaves to cross like this and scald blue or green and owe boiling hot blue or green, improve the color and luster of tealeaves and avoid the stripping of the benefit materials such as Tea Polyphenols, promote tea matter, simultaneously also very thorough to the cleaning of tealeaves.
Tealeaves scalds the blue or green time can by arranging the boiling hot length of blue or green carrier pipe 13 and the flow velocity of hot water controls, and it is consistent with the optimal transport flow in boiling hot blue or green carrier pipe 13 that the hot water in hopper 12 injects flow.From boiling hot blue or green carrier pipe 13 lower end, out tealeaves is separated by foraminous conveyer (screen cloth) with hot water, and after being separated, tealeaves dries rapidly and carries out next step operation.
Further scheme is, scalding blue or green carrier pipe 13 is that spiral helicine insulating tube is formed, as shown in Figure 5.Spiral helicine insulating tube can reduce the length of boiling hot blue or green carrier pipe 13, avoids tealeaves to block in boiling hot blue or green carrier pipe 13.In addition, can arrange gripper shoe at the periphery wall of hopper 12, gripper shoe is set up and is fixed in frame 11, gripper shoe consists of to be rotatably assorted with frame 11 ball connector and is connected, first driving mechanism can be motor and forms, and hopper 12 is connected with motor by belt, and motor drives hopper 12 to rotate.
For airing device 20, its technical scheme taked is as Fig. 6, 7, shown in 8, airing device 20 comprises horizontally disposed foraminous conveyer, feed end and the corresponding layout of the lower end discharging mouth of pipe 131 of scalding blue or green carrier pipe 13 of foraminous conveyer, scalding to be provided with between blue or green carrier pipe 13 and foraminous conveyer makes tealeaves evenly drop down onto cloth materials and parts 24 on foraminous conveyer along the bandwidth direction of foraminous conveyer, the middle part of foraminous conveyer is positioned at bellows 25, and foraminous conveyer comprises, first of lower layout, two guipures 21, 22, first, two guipures 21, water leg 23 is provided with between 22, water leg 23 layout corresponding with the blanking port of cloth materials and parts 24, bellows 25 are that the casing of strip is formed, the vacancy portion passed for foraminous conveyer is offered at the two ends of casing, the bottom of bellows 25 arranges air inlet pipe interface 251, the top of bellows 25 sets out air pipe interface 252, horizontally disposed air distribution plate 253 and gas collection plate 254 is also provided with in bellows 25, air distribution plate 253 and gas collection plate 254 are orifice plate and form, gas collection plate 254 is positioned at the upside of the first guipure 21, air distribution plate 253 is positioned at the downside of the second guipure 22, in bellows 25 first, two guipures 21, also first is provided with between 22, two tracheae 20a, 20b, first, two tracheae 20a, 20b lays respectively at two edge (two edge of throughput direction) of foraminous conveyer and arranges (that is first respectively along the throughput direction of foraminous conveyer, two tracheae 20a, the length direction of 20b is consistent with the throughput direction of foraminous conveyer), first, two tracheae 20a, the pipe shaft of 20b is arranged at intervals with the first air nozzle, the outgassing direction of the first air nozzle points to the middle part of foraminous conveyer obliquely, and first, two guipures 21, the 3rd tracheae 20c is also provided with between 22, 3rd tracheae 20c is positioned at the discharge end of foraminous conveyer and the width along foraminous conveyer is arranged, the pipe shaft of the 3rd tracheae 20c is arranged at intervals with the second air nozzle, the outgassing direction of the second air nozzle points to the side away from foraminous conveyer obliquely, air inlet pipe interface 251 and first, two, three tracheaes are all connected with the air outlet of the second blower fan.
Drop down onto on foraminous conveyer because tealeaves can not directly impact, therefore needing, cloth materials and parts 24 are set and carries out buffering cloth, prevent tealeaves impaired and tealeaves is evenly arranged at the bandwidth direction of foraminous conveyer.By passing into thermal current in the air inlet mouth of pipe aweather case 25, thermal current makes the tealeaves of foraminous conveyer stir dehydration by being uniformly distributed of cloth materials and parts, makes tealeaves rapid airing.The setting of first and second tracheae 20a, 20b be drop and increase tealeaves when preventing tealeaves from stirring on the first guipure from the edge of guipure stir effect, shorten tealeaves flash-off time.The air-flow that 3rd air nozzle is formed can make tealeaves depart from from foraminous conveyer, enters subsequent processing.As arranged the first conveyer belt 26 at the blanking end of foraminous conveyer, the upper strata belt body of the first conveyer belt 26 takes the shape of the letter U, first conveyer belt 26 and foraminous conveyer interlaced arrangement, the tealeaves fallen from foraminous conveyer like this drops down onto in the first conveyer belt 26, is delivered to subsequent processing carries out other and operate by the first conveyer belt 26.
Concrete is operating as, as shown in Figure 9, cloth materials and parts 24 comprise the coaming plate 243 of drapery panel and the setting of drapery panel periphery, drapery panel is that a folding shape plate body is formed, the height of folding shape plate body reduces gradually along the throughput direction of foraminous conveyer, the width of folding shape plate body increases gradually along the throughput direction of foraminous conveyer, folding shape plate body comprises the first plate body 241 and the second plate body 242 that the throughput direction along foraminous conveyer is arranged successively, second plate body 242 is arranged to concordant blade-like compared with the side of low side, second plate body 242 is 3 ~ 5 ° with angle formed by horizontal plane, first plate body 241 is 5 ~ 8 ° with angle formed by horizontal plane, scald the lower end charging mouth of pipe and the corresponding layout of the first plate body 241 of blue or green carrier pipe 13, the boiling hot blue or green heart yearn of the carrier pipe 13 lower end discharging mouth of pipe 131 and the angle of the first plate body 241 are 8 ~ 10 °, scald the lower end discharging mouth of pipe 131 of blue or green carrier pipe 13 and be arranged to horn-like (that is the lower end discharging mouth of pipe 131 be arranged to cross section that is horn-like and the lower end discharging mouth of pipe 131 be elliposoidal) that cross section is elliposoidal.Above-mentioned drapery panel can make tealeaves be uniformly distributed along the width of foraminous conveyer, improves follow-up tealeaves and dries effect.The control of above-mentioned angle is necessary, its can make tealeaves smooth-going drop down onto on foraminous conveyer, prevent tealeaves and foraminous conveyer from clashing into, tealeaves is made to be stuck in mesh interior or broken, found by great many of experiments optimization, adopt above-mentioned angle to implement, the breakage rate of tealeaves can be down to less than 0.8%, greatly improves tea leaf quality.Cloth materials and parts 24 are by connector and support Joint.
Because tealeaves is in boiling hot blue or green process, the impurity on tealeaves surface and pesticide residue can be in the hot water molten, in order to energy-conservation, general hot water and thermal current repeat to recycle, therefore, the present invention adopts scheme as shown in Figure 10 to implement: the delivery port of water leg 23 is connected with rough filtering device 10A, the delivery port of rough filtering device 10A is connected with organic matter removal device 10B, the delivery port of organic matter removal device 10B is connected with heater 10C, the delivery port of heater 10C is connected with hot-water cylinder 10D, and the delivery port of hot-water cylinder 10D is connected with hot-water line and is connected; The escape pipe interface of bellows is connected with the first blower fan 20A, the gas outlet of the first blower fan is connected with dehydrating unit 20B, the gas outlet of dehydrating unit 20B is connected with heater 20C, the gas outlet of heater 20C is connected with the second blower fan 20D, and the gas outlet of the second blower fan 20D is connected with the air inlet pipe interface of bellows.Rough filtering device 10A can be general net filtration device, and for removing some larger impurity, organic matter removal device 10B is mainly used for removing the pesticide residue in water body, can be charcoal absorption filter or other conventional pesticides removal devices; Heater 10C heats hot water, makes the water temperature of hot water meet tealeaves and scalds blue or green demand, realized the conveying of hot water between rough filtering device 10A, organic matter removal device 10B, heater 10C, hot-water cylinder 10D, hopper by the pump housing.Thus realize energy-conservation basis ensureing scalding continuously of tealeaves is blue or green.Dehydrating unit 20B for removing the moisture in thermal current, the demand that heater 20C dries to meet tealeaves for the temperature improving thermal current.
All spreading for cooling devices all can adopt bamboo plaque or bamboo sieve to form.
The concrete technology adopting the said equipment to produce green tea is:
A kind of selenium-rich green tea production technology, comprises the following steps:
Spread: the just fresh leaf of exhibition (bud one leaf, two leaves and a bud) of plucking is positioned over to spread on device to be carried out spreading until tealeaves color starts to turn dark, spreads in process and stirs fresh leaf;
Scald blue or green: the tealeaves after spreading is dropped into boiling hot blue or green process 50 ~ 55s in boiling hot blue or green device, and controlling hot water temperature is 95 ~ 98 DEG C, after boiling hot green grass or young crops, tea leaf conveying is delivered to airing device and dries;
One-level completes: after drying, tealeaves is put into roller fixation machine 130 ~ 140 DEG C of one-levels and to complete process 1.5 ~ 2min;
Spreading for cooling: the tealeaves after one-level being completed is put on the first spreading for cooling device, room temperature one-level spreading for cooling 5 ~ 10min, makes tealeaves recover, and non-enzymatic chemical reaction occurs, development odor type and fragrance;
Secondary completes: the tea leaf conveying after spreading for cooling is delivered to microwave green-killing device and carry out secondary and complete, secondary fixation time 1.2 ~ 1.25min, power 12KW (microwave output power), is placed in room temperature secondary spreading for cooling 5 ~ 8min on the second spreading for cooling device and recovers by tealeaves after secondary completes;
Reason bar: after secondary spreading for cooling, tealeaves is placed in the first carding machine and carries out one-level reason bar, the temperature of one-level reason bar is 50 ~ 60 DEG C, time 2 ~ 2.5min, one-level reason article to terminate rear room temperature and spreads carry out three grades of spreadings for cooling on the 3rd spreading for cooling device, three grades of spreading for cooling times are 5 ~ 8min, after three grades of spreadings for cooling, tealeaves is placed in the second carding machine and carries out secondary reason bar, the temperature of secondary reason bar is 40 ~ 50 DEG C, time 1 ~ 1.5min, secondary reason article to terminate rear room temperature and spreads carry out level Four spreading for cooling on the 4th spreading for cooling device, and the level Four spreading for cooling time is 8 ~ 10min;
Dry: after level Four spreading for cooling, tealeaves is placed in the first drying unit and carries out one-level oven dry, the temperature that one-level is dried is 100 ~ 105 DEG C, one-level oven dry reduces to less than 25% to tealeaves moisture content, one-level is dried and is terminated rear room temperature and spread carry out Pyatyi spreading for cooling on the 5th spreading for cooling device, the Pyatyi spreading for cooling time is 20 ~ 25min, initial stage of Pyatyi spreading for cooling is upgraded to 30 ~ 35% by flusher to tealeaves surface spraying Organic Selenium solution to the moisture content of tealeaves, after Pyatyi spreading for cooling, tealeaves is placed in the second oven dry and carries out secondary drying and processing, secondary drying and processing terminates rear room temperature and spreads carry out six grades of spreadings for cooling on the 6th spreading for cooling device, six grades of spreading for cooling times are 30 ~ 35min, secondary drying and processing is: first 100 ~ 105 DEG C of drying and processing 8 ~ 10min, and then 85 ~ 90 DEG C of oven dry to tealeaves moisture content reduce to less than 5%, the fountain height of Organic Selenium solution using organic selenium content in obtained selenium-enriched tea leaf be 0.23 ~ 0.25mg/kg as control foundation, to be rich selenium distiller's yeast through cooking process remove to prepare with distilled water after alcohol, peculiar smell Organic Selenium solution obtains, can avoid after process in this manner impacting the fragrance of tealeaves, color and luster and millet paste mouthfeel because spraying organic selenium solution.
Slaking: after oven dry, tealeaves is placed in refrigerating chamber 1 ~ 3 DEG C refrigeration slaking 1 month (oxygen barrier of trying one's best during refrigeration slaking or by Control for Oxygen Content very low);
Titian: the tealeaves after refrigeration slaking is put into fragrance extracting machine 80 ~ 85 DEG C of Titian 30 ~ 35min, and Titian terminates rear cooling and vacuum packaging.
The green tea that above-mentioned technique is produced, bar shaped is unfolded neat and well spaced, and the dark green profit of color and luster is bright, and odor type is Li Xiang, gives off a strong fragrance, and soup look dark green is bright, and millet paste is mellow fresh refreshing, and being rich in Organic Selenium, is fine work in health care green tea.
The above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; to know in the present invention after contents; under the premise without departing from the principles of the invention; can also make some equal conversion to it and substitute, these convert on an equal basis and substitute and also should be considered as belonging to protection scope of the present invention.
Claims (1)
1. a selenium-rich green tea production technology, comprises the following steps:
Spread: the fresh leaf of the first exhibition of harvesting is positioned over spread on device and carries out spreading until tealeaves color starts to turn dark, spread in process and stir fresh leaf;
Scald blue or green: the tealeaves after spreading is dropped into boiling hot blue or green process 50 ~ 55s in boiling hot blue or green device, and controlling hot water temperature is 95 ~ 98 DEG C, after boiling hot green grass or young crops, tea leaf conveying is delivered to airing device and dries;
One-level completes: after drying, tealeaves is put into roller fixation machine 130 ~ 140 DEG C of one-levels and to complete process 1.5 ~ 2min;
Spreading for cooling: the tealeaves after one-level being completed is put on the first spreading for cooling device, room temperature one-level spreading for cooling 5 ~ 10min;
Secondary completes: the tea leaf conveying after spreading for cooling is delivered to microwave green-killing device and carry out secondary and complete, secondary fixation time 1.2 ~ 1.25min, is placed in room temperature secondary spreading for cooling 5 ~ 8min on the second spreading for cooling device and recovers by tealeaves after secondary completes;
Reason bar: after secondary spreading for cooling, tealeaves is placed in the first carding machine and carries out one-level reason bar, the temperature of one-level reason bar is 50 ~ 60 DEG C, time 2 ~ 2.5min, one-level reason article to terminate rear room temperature and spreads carry out three grades of spreadings for cooling on the 3rd spreading for cooling device, three grades of spreading for cooling times are 5 ~ 8min, after three grades of spreadings for cooling, tealeaves is placed in the second carding machine and carries out secondary reason bar, the temperature of secondary reason bar is 40 ~ 50 DEG C, time 1 ~ 1.5min, secondary reason article to terminate rear room temperature and spreads carry out level Four spreading for cooling on the 4th spreading for cooling device, and the level Four spreading for cooling time is 8 ~ 10min;
Dry: after level Four spreading for cooling, tealeaves is placed in the first drying unit and carries out one-level oven dry, the temperature that one-level is dried is 100 ~ 105 DEG C, one-level oven dry reduces to less than 25% to tealeaves moisture content, one-level is dried and is terminated rear room temperature and spread carry out Pyatyi spreading for cooling on the 5th spreading for cooling device, the Pyatyi spreading for cooling time is 20 ~ 25min, initial stage of Pyatyi spreading for cooling is upgraded to 30 ~ 35% by flusher to tealeaves surface spraying Organic Selenium solution to the moisture content of tealeaves, after Pyatyi spreading for cooling, tealeaves is placed in the second oven dry and carries out secondary drying and processing, secondary drying and processing terminates rear room temperature and spreads carry out six grades of spreadings for cooling on the 6th spreading for cooling device, six grades of spreading for cooling times are 30 ~ 35min, secondary drying and processing is: first 100 ~ 105 DEG C of drying and processing 8 ~ 10min, and then 85 ~ 90 DEG C of oven dry to tealeaves moisture content reduce to less than 5%,
Slaking: after oven dry, tealeaves is placed in refrigerating chamber 1 ~ 3 DEG C refrigeration slaking 1 month;
Titian: the tealeaves after refrigeration slaking is put into fragrance extracting machine 80 ~ 85 DEG C of Titian 30 ~ 35min, and Titian terminates rear cooling and vacuum packaging.
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