CN113995028A

CN113995028A - Green tea production process

Info

Publication number: CN113995028A
Application number: CN202111501099.XA
Authority: CN
Inventors: 庄书; 张祖梅; 汪义顺; 张祖国
Original assignee: Yuexi Haifu Ecological Agriculture Development Co ltd
Current assignee: Yuexi Haifu Ecological Agriculture Development Co ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-02-01

Abstract

The invention relates to a green tea production process, which comprises the following operation steps: spreading picked fresh leaves to release green grass air, putting the tea leaves into a tea carding and tea carding machine to be enzyme-deactivating and tea carding treatment after spreading treatment, putting the tea leaves into an electric oven to be subjected to primary drying treatment after the enzyme-deactivating and tea carding treatment, performing resuscitation treatment on the tea leaves after the primary drying treatment, putting the tea leaves into a bamboo skin drying cage to be subjected to secondary drying treatment by adopting charcoal fire after the resuscitation treatment to obtain dry tea. The technical scheme provided by the invention has the advantages that the whole operation process is simpler, the small and medium-sized tea factories can have implementation conditions, and the implementation equipment cost is low. Adopts full spreading treatment, fully disperses the green grass flavor of the tea leaves, and improves the aroma and the taste of the dry tea. Through the combination of hot-blast and electrical heating for the tealeaves completes more fully thorough, can show the odor type and the color and luster that promote tealeaves simultaneously. Through multi-stage drying treatment and recovery treatment, the moisture in the tea leaves is redistributed, so that the flavor of the tea soup brewed from the tea leaves is more lasting and full-bodied.

Description

Green tea production process

Technical Field

The invention belongs to the field of tea production, and particularly relates to a green tea production process.

Background

In the mountain area of the Yuexi county, the forest coverage rate in the county is high, the mountain is clear and elegant, and the quality of the locally produced green tea is good, so that the tea lovers are deeply discussed. However, local tea production is mainly finished by respective processing and production of farmers, and tea quality is easy to be different. The analysis finds that the following reasons mainly exist, one of which is that the existing tea machine equipment has corresponding defects, so that the tea leaves cannot be uniformly processed; secondly, the operating conditions of farmers are different, so that the tea leaves cannot be reliably processed. Therefore, it is necessary to solve this problem.

Disclosure of Invention

The object of the present invention is to provide a green tea manufacturing process which can be used to solve the above technical problems.

The technical scheme adopted by the invention is as follows:

a green tea production process comprises the following operation steps: spreading picked fresh leaves to release green grass air, putting the tea leaves into a tea carding and tea carding machine to be enzyme-deactivating and tea carding treatment after spreading treatment, putting the tea leaves into an electric oven to be subjected to primary drying treatment after the enzyme-deactivating and tea carding treatment, performing resuscitation treatment on the tea leaves after the primary drying treatment, putting the tea leaves into a bamboo skin drying cage to be subjected to secondary drying treatment by adopting charcoal fire after the resuscitation treatment to obtain dry tea.

The further scheme is as follows: the electric heating mode is adopted to heat the groove pot, and the hot air auxiliary mode is adopted to carry out the water-removing and strip-tidying treatment on the tea.

Spreading the tea leaves by using a bamboo plaque, turning the tea leaves for 2-3 times during spreading treatment, wherein the spreading treatment time is 2-3 hours, and the spreading treatment temperature is 30-32 ℃.

Sieving the tea before spreading, and selecting fresh leaves with one bud and one leaf and two leaves with one bud for subsequent processing.

And during the water-removing and carding treatment, the temperature of the groove wall of the carding groove is controlled to be 220-250 ℃, the temperature of hot air is controlled to be 200-230 ℃, and the time of the water-removing and carding treatment is 4-6 min.

The temperature of the primary drying treatment is 120-150 ℃, the primary drying treatment is carried out until the moisture content of the tea leaves is reduced to 15-20%, the temperature of the secondary drying treatment is 80-100 ℃, and the secondary drying treatment is carried out until the moisture content of the tea leaves is reduced to 3-5%.

The recovery treatment comprises the steps of spreading the tea leaves subjected to the primary drying treatment on a bamboo plaque, and humidifying air by using a humidifying device to enable the water content of the tea leaves to be increased to 20-30%.

Hot air is distributed in the tea leaf carding groove from the notches at the two sides of the tea leaf carding groove downwards in an inclined mode to carry out enzyme deactivation and tea leaf carding treatment on the tea leaves.

A hot air pipe is arranged at the joint of the notches of the groove walls of the adjacent strip tidying grooves, and hot air is blown into the strip tidying grooves on the two outer sides of the hot air pipe through a first air outlet and a second air outlet which are respectively arranged on the hot air pipe to perform enzyme deactivating and strip tidying treatment.

The hot air delivered by the hot air source is distributed uniformly by adopting the air distribution pipeline, so that the hot air in each hot air pipe is uniformly distributed, and the tea leaves in each tea strip tidying groove are uniformly de-enzymed and tidied.

The technical scheme provided by the invention has the advantages that the whole operation process is simpler, the small and medium-sized tea factories can have implementation conditions, and the implementation equipment cost is low. Adopts full spreading treatment, fully disperses the green grass flavor of the tea leaves, and improves the aroma and the taste of the dry tea. Through the combination of hot-blast and electrical heating for the tealeaves completes more fully thorough, can show the odor type and the color and luster that promote tealeaves simultaneously. Through multi-stage drying treatment and recovery treatment, the moisture in the tea leaves is redistributed, so that the flavor of the tea soup brewed from the tea leaves is more lasting and full-bodied.

Drawings

FIG. 1 is a schematic structural diagram of a water-removing and carding machine;

FIG. 2 is a rear view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a right side view of FIG. 1;

FIG. 5 is a schematic structural view of the air distributing duct, the hot air duct and the carding groove;

FIG. 6 is a side view of FIG. 5;

FIG. 7 is a cross-sectional view A-A of FIG. 6;

FIG. 8 is an enlarged view at X in FIG. 7;

the correspondence between reference numerals and components is specifically as follows:

100-frame, 110-swing bracket, 111-connecting rod, 112-abutting piece, 120-turnover bracket, 121-carding groove, 122-hot air pipe, 123-movable plate, 124-fixed plate, 125-discharging groove, 126-first shaft body, 127-tension spring, 128-adjusting piece, 129-sliding guide rod, 12 a-first air outlet, 12 b-second air outlet, 131-air supply pipe, 132-transition pipe, 133-air distribution pipe, 134-first sealing piece, 135-second sealing piece, 136-first partition plate, 137-second partition plate, 13 a-second area, 13 b-first sub-chamber, 13 c-second sub-chamber, 141-second roller, 142-first roller, 143-first connecting piece, 144-second connecting piece, 145-floating spring, 146-fold.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the invention will now be described in detail with reference to the following examples. It is to be understood that the following text is merely illustrative of one or more specific embodiments of the invention and does not strictly limit the scope of the invention as specifically claimed. As used herein, the terms "parallel" and "perpendicular" are not limited to their strict geometric definitions, but include tolerances for machining or human error, reasonable and inconsistent.

Fresh leaves picked before and 5 days after Qingming in Yuexi are used as raw materials, tea leaves are screened, and fresh leaves with one bud and one leaf and two leaves with one bud are selected and reserved for subsequent processing. Spreading the tea leaves by using a bamboo plaque to remove green grass smell, turning the tea leaves for 2-3 times during spreading treatment, wherein the spreading treatment time is 2-3 hours, and the spreading treatment temperature is 30-32 ℃. After spreading, putting the tea leaves into a tea tidying and enzyme deactivating machine for enzyme deactivating and carding treatment, wherein during the enzyme deactivating and carding treatment, the temperature of the groove wall of a carding groove is controlled to be 220-250 ℃, the temperature of hot air is controlled to be 200-230 ℃, and the time of the enzyme deactivating and carding treatment is 4-6 min. After the tea leaves are subjected to the water-removing and strip-tidying treatment, the tea leaves are placed in an electric oven to be subjected to primary drying treatment, the temperature of the primary drying treatment is 120-150 ℃, the primary drying treatment is carried out until the water content of the tea leaves is reduced to 15-20%, the tea leaves are subjected to resuscitation treatment after the primary drying treatment, the resuscitation treatment is that the tea leaves subjected to the primary drying treatment are spread on a bamboo plaque, and a humidifying device is adopted for humidifying, so that the water content of the tea leaves is increased to 20-30%. And after the recovery treatment, putting the tea leaves into a bamboo skin drying cage, and performing secondary drying treatment by using charcoal fire to obtain dry tea, wherein the temperature of the secondary drying treatment is 80-100 ℃, and the secondary drying treatment is performed until the water content of the tea leaves is reduced to 3-5%.

The structure of the tea leaf fixation and carding machine for implementing tea leaf fixation and carding treatment in the operation is shown in figures 1-8, and is an improvement on the existing overturning discharging type fixation and carding machine. The water-removing and carding machine comprises a machine frame 100, and a swing bracket 110 and a turnover bracket 120 which are arranged on the machine frame 100, wherein carding grooves 121 are arranged on the turnover bracket 120 in an arrayed manner, one side edge of the turnover bracket 120 is rotatably installed on the swing bracket 110 through a first shaft body 126 which is horizontally arranged, the length direction of the carding grooves 121 is vertical to the first shaft body 126, and the swing bracket 110 is installed on the machine frame 100 in a sliding manner along the length direction of the first shaft body 126. The rack 100 is provided with a driving disc which is rotatably installed, a rotating shaft of the driving disc is arranged horizontally and perpendicular to the first shaft body 126, a connecting rod 111 is arranged between the driving disc and the swing bracket 110, one end of the connecting rod 111 is hinged with the swing bracket 110, the other end of the connecting rod 111 is eccentrically hinged with the driving disc, and the driving disc is connected with a first driving motor through a first transmission assembly. The overturning bracket 120 is provided with a strip-shaped movable plate 123 and a strip-shaped fixed plate 124, the upper side edge part of the movable plate 123 is provided with a second shaft body, the second shaft body is rotatably installed on the overturning bracket 120, the fixed plate 124 is fixedly installed on the overturning bracket 120, two ends of the second shaft body are respectively provided with an adjusting piece 128, the adjusting piece 128 is formed by an L-shaped rod piece and comprises a first body section and a second body section, the first body section and the second shaft body are fixedly connected and vertically arranged, the second body section and the second shaft body are arranged in parallel, the swinging bracket 110 is provided with a leaning piece 112 for leaning against the second body section, the leaning piece 112 is formed by a short rod which is vertically and fixedly installed on the swinging bracket 110, the adjusting piece 128 and the swinging bracket 110 are connected through a tension spring 127, when the overturning bracket 120 is horizontally arranged, the movable plate 123 and the fixed plate 124 block two ends of the strip arranging groove 121 to prevent tea leaves from moving out, and when the overturning bracket 120 is obliquely arranged, the movable plate 123 and the carding groove 121 are separated so that the tea leaves can be moved out of the carding groove 121 from the end on the side where the movable plate 123 is disposed. A discharging chute 125 for discharging and guiding the tea leaves is arranged outside the movable plate 123. The other side of the turning bracket 120 is provided with a sliding guide rod 129, the sliding guide rod 129 is fixedly installed at the side of the fixed plate 124, the rack 100 is provided with a first driving shaft which is rotatably installed and is parallel to the first shaft body 126, the first driving shaft is fixedly provided with a folding member 146, the other end of the folding member 146 is hinged with the lower end of a first connecting member 143, the upper end of the first connecting member 143 is provided with a first installing member, the first installing member is provided with two first rollers 142 which are rotatably installed, the first connecting member 143 is provided with two first installing blocks and two second installing blocks which are arranged at intervals along the body length direction, the first installing blocks are positioned above the second installing blocks, the first installing blocks and the second installing blocks are provided with a second connecting member 144 which is slidably (floatingly) installed, the second connecting member 144 is provided with a first limiting member and a second limiting member, the first limiting member is positioned at the outer side (upper side) of the first installing block, the second locating part is located between the first and second installation blocks, a floating spring 145 is arranged (sleeved) on the body part of the second connecting part 144 between the first installation block and the second locating part, the floating spring 145 orders the second locating part and the second installation block to be close to each other, a second installation part is arranged at the upper end of the second connecting part 144, a second roller 141 is arranged on the second installation part, the first and second rollers are respectively arranged on the upper and lower sides of the sliding guide rod, a groove used for wrapping the sliding guide rod 129 is arranged on each of the first and second rollers, and the second roller 141 is located between the two first rollers 142 and used for clamping and rolling matching the sliding guide rod 129. The first driving shaft is connected with a second driving motor through a second transmission assembly.

The hot air pipes 122 are disposed at the notches of the two groove walls of the strip tidying groove 121, a row of first air outlets 12a and a row of second air outlets 12b are disposed on the hot air pipes 122, and the first air outlets and the second air outlets respectively distribute hot air into the two adjacent strip tidying grooves 121 on the outer sides. The turning support 120 is further provided with an air distribution pipeline 133, the swing support 110 is provided with a transition pipe 132, the hot air source comprises a blower and an air supply pipe 131 arranged on the rack 100, an electric heater is arranged in the air supply pipe 131, the transition pipe 132 and the air distribution pipeline 133 are both arranged along the length direction of the first shaft 126, the outlet end of the air supply pipe 131 is inserted into the transition pipe 132 and the transition pipe 132 are assembled in a sliding manner, one end of the air distribution pipeline 133 close to the transition pipe 132 is provided with an air inlet end, one end of the air distribution pipeline 133 far away from the transition pipe 132 is provided with a blocking shape, a first partition plate 136 is arranged in the pipe cavity of the air distribution pipeline 133, the pipe cavity of the air distribution pipeline 133 is divided into a first area and a second area by the first partition plate 136, the first partition plate 136 is a long strip-shaped plate body, the length direction of the first partition plate 136 is consistent with the length direction of the first shaft 126, and the plate surface of the first partition plate 136 is arranged perpendicular to the hot air supply pipe 122, one end of the hot air pipe 122 is set to be blocked, the other end of the hot air pipe 122 passes through the pipe wall of the air distribution pipeline 133 and extends into the first area, the pipe body section of the hot air pipe 122 arranged on the air distribution pipeline 133 is marked as a pipe distribution section, the first area and the second area are in a mutually isolated state in the pipe distribution section, a second partition plate 137 is arranged in the first area, the second partition plate 137 divides the first area into a first sub-chamber and a second sub-chamber which are mutually isolated along the length direction of the air distribution pipeline 133, the second partition plate 137 and the first partition plate 136 are vertically arranged, the end part of the first partition plate 136 and the end part of the blocked section of the air distribution pipeline 133 are separately arranged to form a communicated vacancy part, the second sub-chamber 13c and the second area 13a are communicated and connected through the communicated vacancy part, the hot air pipe 122 is a round pipe, the end surface of the end part of the round pipe 122 arranged in the first area is marked as an A end surface, the A end surface and the body length direction of the hot air pipe 122 are arranged in an included angle, the outer contour shape of the end face A is oval, the long axis of the oval and the plane of the central line of the hot air pipe 122 are arranged in parallel with the first shaft body 126, the hot air pipe 122 with the end part inserted in the first sub-chamber 13b is the first-class hot air pipe 122, the hot air pipe 122 with the part inserted in the second sub-chamber 13c is the second-class hot air pipe 122, the two ends of the long axis of the oval on the first-class hot air pipe 122 are respectively marked as an a1 end and an a2 end, the a1 end is arranged close to the strip arranging groove 121 than the a2 end, and the distance between the a1 end and the air inlet end is smaller than the distance between the a2 and the air inlet end; two ends of the major axis of the ellipse on the second type of hot air duct 122 are respectively marked as a b1 end and a b2 end, the b1 end is closer to the carding groove 121 than the b2 end, and the distance between the b1 end and the air inlet end is larger than the distance between the b2 end and the air inlet end, when the turnover bracket 120 is in a horizontal arrangement state, the outlet end of the transition pipe 132 is connected with the air inlet end of the air distribution pipe 133 in a forward-extending manner. Transition pipe 132 is along its length direction movable mounting on swing bracket 110, transition pipe 132 is connected with the accent pipe electric cylinder or the adjustment cylinder that adjusts it and remove, the exit end of transition pipe 132 is provided with first sealing member 134, the air inlet end of dividing wind pipeline 133 is provided with second sealing member 135, first, two sealing members realize when leaning on between transition pipe 132 and the handing-over department of dividing wind pipe, divide wind pipeline 133 to be square pipeline, fixed plate 124 and the plate that divides wind pipeline 133 fixed assembly constitute.

The hot air pipes 122 are arranged at the notches on the two side walls of the strip-forming groove 121, and hot air is blown into the strip-forming groove 121 on the two outer sides of the hot air pipes 122 through the first air outlet and the second air outlet which are respectively arranged on the hot air pipes 122 to perform enzyme deactivating and strip-forming treatment. The air distributing pipeline 133 is adopted to distribute the hot air sent out by the hot air source uniformly, so that the hot air in each hot air pipe 122 is uniformly distributed, and the tea leaves in each tea strip tidying groove 121 are uniformly subjected to water removing and tea strip tidying treatment.

According to the scheme provided by the invention, the tea making process is unified, the whole operation process is simpler, the implementation conditions of small and medium-sized tea factories can be met, and the implementation equipment cost is low. Adopts full spreading treatment, fully disperses the green grass flavor of the tea leaves, and improves the aroma and the taste of the dry tea. The electric heating strip tidying groove 121 can enable the strip tidying groove 121 to be heated uniformly, and non-uniformity of traditional gas heating is avoided. Through the combination of hot-blast and electrical heating for the tealeaves completes more fully thorough, can show the odor type and the color and luster that promote tealeaves simultaneously. Through multi-stage drying treatment and recovery treatment, the moisture in the tea leaves is redistributed, so that the flavor of the tea soup brewed from the tea leaves is more lasting and full-bodied. And secondly, the tea leaf de-enzyming and carding machine is improved, so that de-enzyming and carding treatment of the tea leaves is balanced, and the quality of the tea leaves is ensured.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention. Structures, devices, and methods of operation not specifically described or illustrated herein are generally practiced in the art without specific recitation or limitation.

Claims

1. A green tea production process comprises the following operation steps: spreading picked fresh leaves to release green grass air, putting the tea leaves into a tea carding and tea carding machine to be enzyme-deactivating and tea carding treatment after spreading treatment, putting the tea leaves into an electric oven to be subjected to primary drying treatment after the enzyme-deactivating and tea carding treatment, performing resuscitation treatment on the tea leaves after the primary drying treatment, putting the tea leaves into a bamboo skin drying cage to be subjected to secondary drying treatment by adopting charcoal fire after the resuscitation treatment to obtain dry tea.

2. The green tea production process according to claim 1, characterized in that: the electric heating mode is adopted to heat the groove pot, and the hot air auxiliary mode is adopted to carry out the water-removing and strip-tidying treatment on the tea.

3. The green tea production process according to claim 2, characterized in that: spreading the tea leaves by using a bamboo plaque, turning the tea leaves for 2-3 times during spreading treatment, wherein the spreading treatment time is 2-3 hours, and the spreading treatment temperature is 30-32 ℃.

4. The green tea production process according to claim 3, characterized in that: sieving the tea before spreading, and selecting fresh leaves with one bud and one leaf and two leaves with one bud for subsequent processing.

5. The green tea production process according to claim 1, characterized in that: and during the water-removing and carding treatment, the temperature of the groove wall of the carding groove is controlled to be 220-250 ℃, the temperature of hot air is controlled to be 200-230 ℃, and the time of the water-removing and carding treatment is 4-6 min.

6. The green tea production process according to claim 1, characterized in that: the temperature of the primary drying treatment is 120-150 ℃, the primary drying treatment is carried out until the moisture content of the tea leaves is reduced to 15-20%, the temperature of the secondary drying treatment is 80-100 ℃, and the secondary drying treatment is carried out until the moisture content of the tea leaves is reduced to 3-5%.

7. The green tea production process according to claim 1, characterized in that: the recovery treatment comprises the steps of spreading the tea leaves subjected to the primary drying treatment on a bamboo plaque, and humidifying air by using a humidifying device to enable the water content of the tea leaves to be increased to 20-30%.

8. The green tea production process according to claim 2, characterized in that: hot air is distributed in the tea leaf carding groove from the notches at the two sides of the tea leaf carding groove downwards in an inclined mode to carry out enzyme deactivation and tea leaf carding treatment on the tea leaves.

9. The green tea manufacturing process of claim 8, wherein: a hot air pipe is arranged at the joint of the notches of the groove walls of the adjacent strip tidying grooves, and hot air is blown into the strip tidying grooves on the two outer sides of the hot air pipe through a first air outlet and a second air outlet which are respectively arranged on the hot air pipe to perform enzyme deactivating and strip tidying treatment.

10. The green tea production process according to claim 9, characterized in that: the hot air delivered by the hot air source is distributed uniformly by adopting the air distribution pipeline, so that the hot air in each hot air pipe is uniformly distributed, and the tea leaves in each tea strip tidying groove are uniformly de-enzymed and tidied.