CN112825942A - Preparation method of honeysuckle tea - Google Patents
Preparation method of honeysuckle tea Download PDFInfo
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Classifications
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- 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
- A23F3/34—Tea substitutes, e.g. matè; Extracts or infusions thereof
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- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Tea And Coffee (AREA)
Abstract
The invention provides a preparation method of honeysuckle tea, which comprises the following steps: picking up honeysuckle buds with anhydrous surfaces before blooming, heating the honeysuckle buds for 5 to 10 minutes by using normal pressure steam for deactivation of enzymes, uniformly distributing the honeysuckle buds on a drying sieve tray, putting the honeysuckle buds into an oven, drying the honeysuckle buds for 2 to 3 hours at the temperature of between 35 and 45 ℃ and under the condition that the relative humidity is lower than 50 percent, drying the honeysuckle buds for 2 to 3 hours at the temperature of between 45 and 55 ℃ and under the condition that the relative humidity is lower than 40 percent, finally drying the honeysuckle buds for 1 to 2 hours at the temperature of between 65 and 70 ℃ and under the condition that the relative humidity is lower than 30 percent, selecting and packaging the honeysuckle. The method combines temperature control and humidity control, realizes low-temperature dehydration and drying of the honeysuckle by dehumidifying internal circulating hot air, shortens the dehydration and drying time by about one third to one half, reduces the energy consumption by more than 40 percent, and has less fresh scent loss; the prepared honeysuckle tea has good appearance, water content, fresh fragrance and brewing and drinking effects.
Description
Technical Field
The invention belongs to the field of tea production, and particularly relates to a preparation method of honeysuckle tea.
Background
Honeysuckle, also known as honeysuckle, blooms in spring, turning white at the beginning and yellow at the end, so it is named.
The honeysuckle is a common traditional Chinese medicinal material, is cold in nature and sweet in taste, enters lung, heart and stomach channels, has the effects of clearing away heat and toxic materials, resisting inflammation, tonifying deficiency and treating wind, and is mainly used for treating diseases such as distending pain, epidemic febrile disease, fever, toxic heat, carbuncle and ulcer, tumors and the like. It has therapeutic effects on dizziness, thirst, hyperhidrosis, vexation, enteritis, bacillary dysentery, measles, pneumonia, encephalitis B, epidemic encephalitis, acute mastitis, septicemia, appendicitis, skin infection, carbuncle, furuncle, erysipelas, parotitis, and suppurative tonsillitis. Modern researches prove that the honeysuckle contains pharmacological active ingredients such as chlorogenic acid and luteolin glycoside, has stronger inhibitory power on various pathogenic bacteria such as hemolytic streptococcus, staphylococcus aureus and the like and upper respiratory infection pathogenic viruses and the like, can enhance immunity, resist early pregnancy, protect liver, resist tumor, diminish inflammation, relieve fever, stop bleeding (blood coagulation), inhibit intestinal absorption of cholesterol and the like, has very wide clinical application, and can be used for treating more than 40 diseases such as respiratory infection, bacillary dysentery, acute urinary infection, hypertension and the like by being compatible with other medicines.
The flos Lonicerae can be used alone or mixed with other common materials including some Chinese medicinal materials to make into tea, and can be drunk after soaking with boiling water to remove summer-heat and improve eyesight or treat some exogenous diseases, for example, flos Lonicerae, flos Chrysanthemi, radix Platycodi and Glycyrrhrizae radix can be drunk after soaking with water to prevent and treat pharyngolaryngitis and tonsillitis.
Generally, the better the quality, the better the efficacy and the higher the value of the honeysuckle, and the honeysuckle is more easily accepted as tea capable of being brewed and drunk; the purchase and sale price of honeysuckle as tea is generally obviously higher than that of the honeysuckle as medicinal materials. The best honeysuckle flower bud is rod-shaped, thick at the top and thin at the bottom, slightly bent, green and white in surface, thick and slightly hard in flower crown, fragrant in smell, sweet and slightly bitter in taste, and the flower bud and yellow stripe are not more than 5%; no black strips, black heads, branches and leaves, impurities, worm damage and mildew.
Traditionally, high-quality honeysuckle tea is generally prepared by drying buds to be opened in the shade or airing the buds under a low-light condition. Because of centralized large-area planting, a large amount of drying of high-quality honeysuckle tea cannot be realized by drying in the shade or airing under a low-light condition, so that a low-temperature dehydration drying technology is developed and applied, but the existing low-temperature dehydration drying technology is usually more focused on temperature control, and the attention degree on humidity control is usually not enough, so that the rationality of a honeysuckle dehydration drying process and the appearance and quality of a dehydrated and dried honeysuckle tea product are influenced.
In the prior art, moisture released in the honeysuckle drying process is removed by continuously discharging moisture-containing airflow; since the low temperature dehydration stage is long and the moisture concentration of the moisture-containing gas stream discharged at low temperature is low, the discharge amount of the low temperature moisture stream is large, resulting in excessive fragrance loss.
Disclosure of Invention
In order to solve the technical problems, the invention provides a preparation method of honeysuckle tea, which comprises the following steps:
(1) picking up honeysuckle buds with anhydrous surfaces before blooming;
(2) deactivating enzyme of flos Lonicerae bud by heating with atmospheric steam for 5-10 min;
(3) uniformly distributing the de-enzymed honeysuckle on a drying sieve tray, loading the drying sieve tray on a truck, and pushing the truck into a drying box;
(4) setting the drying box conditions to 35-45 ℃ and the relative humidity to be lower than 50%, and drying for 2-3 hours under the conditions;
(5) setting the temperature of the drying box to be 45-55 ℃ and the relative humidity to be lower than 40%, and drying for 2-3 hours under the condition;
(6) setting the drying box conditions to be 65-70 ℃ and the relative humidity to be lower than 30%, and drying for 1-2 hours under the conditions;
(7) and discharging the dried honeysuckle, selecting and packaging to obtain the honeysuckle tea.
Wherein, the surface waterless in the step (1) means that no visible moisture such as dew and rainwater exists on the surface of the flower buds before the honeysuckle is picked, or the visible moisture such as the dew and the rainwater is aired to be dry, so as to avoid uneven or incomplete steam de-enzyming.
And (3) when the honeysuckle is subjected to water removing in the step (2), the honeysuckle is distributed on the mesh belt or the sieve tray to a thickness of 3-10 mm. The purpose of the enzyme deactivation is to kill the activity of biological enzyme in the honeysuckle, and avoid the bud phase, the change of flavor and the loss of useful components in the low-temperature drying process. The useful components in flos Lonicerae mainly include chlorogenic acid, flavone and linalool.
In the step (3), the distribution thickness of the honeysuckle on the drying sieve tray is 3-15 mm.
In the steps (4) to (6), the temperature of the drying box can be realized by heating hot air circulating in the drying box through circulating hot water by a heat exchanger; the circulating hot water is supplied by a hot water boiler and/or a solar water heater, and can also be realized by heating hot air circulating in the drying box through an air energy heat pump heat exchanger, wherein the electric heating efficiency of the air energy heat pump can reach more than 3.0 generally, and the energy consumption cost of the two methods is lower.
In the steps (4) to (5), the humidity of the circulating air in the drying box can be controlled by a compression refrigeration dehumidifier arranged outside the drying box, the electrothermal efficiency of the dehumidifier can reach more than 8 under the temperature condition, and the circulating air returns to the drying box after heat exchange and temperature rise because the circulating air has already passed through the counter-flow heat exchange of the precooling heat exchanger before the low-temperature heat exchanger of the compression refrigeration dehumidifier.
In the step (6), the humidity of the circulating air in the drying box can be controlled by an air-cooling heat exchange dehumidifier arranged outside the drying box, low-temperature air subjected to heat exchange dehumidification through a precooling heat exchanger and the air-cooling heat exchange dehumidifier is subjected to counter-current heat exchange before an air-cooling heat exchanger of the air-cooling heat exchange dehumidifier, and the circulating air returns to the drying box after the heat exchange temperature is raised.
The water content of the honeysuckle tea obtained in the step (7) can be lower than 12%, the insect egg infectious microbe viruses are killed, and the honeysuckle tea is free from insects and mildew after being hermetically packaged, stable in quality and long in quality guarantee period of more than one year.
Compared with the existing low-temperature dehydration drying technology which does not pay attention to the humidity control technology, the method combines temperature control and humidity control, realizes low-temperature dehydration drying of the honeysuckle by dehumidifying internal circulating hot air, shortens the dehydration drying time by about one third to one half, basically prevents hot air from being discharged outwards, reduces the energy consumption by more than 40 percent, and has less fragrance loss; the dried honeysuckle has good appearance, water content, fresh flavor, brewing and drinking effects and strong fragrance, and meets the quality requirements of the honeysuckle tea.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Examples
The honeysuckle tea is prepared by the following steps:
(1) picking up honeysuckle buds with no dew, rain and other visible water on the surface before blooming;
(2) deactivating enzyme of picked flos Lonicerae bud in a water-removing machine, wherein the distribution thickness on the mesh belt is about 8mm, and the water-removing condition is heating with steam at 100 deg.C under normal pressure for about 8 min;
(3) uniformly distributing the water-removed honeysuckle on a drying sieve tray, wherein the distribution thickness of the drying sieve tray is about 12mm, loading the drying sieve tray on a truck, and pushing the truck into a drying box;
(4) setting the conditions of the drying oven at 40 ℃ and 50% relative humidity, and drying for 2.5 hours under the conditions;
(5) setting the temperature of the drying oven to be 50 ℃ and the relative humidity to be 40%, and continuously drying for 2.5 hours under the conditions;
(6) setting the conditions of the drying oven at 67 ℃ and 30% relative humidity, and continuing drying for 2 hours under the conditions;
(7) and discharging the dried honeysuckle, selecting and packaging to obtain the honeysuckle tea.
The temperature of the drying box is realized by heating hot air circulating in the drying box through circulating hot water by a heat exchanger, and the hot air is basically not discharged outwards; the circulating hot water is supplied by a hot water boiler and a solar water heater.
In the steps (4) to (5), the humidity of the circulating air in the drying box is controlled by a compression refrigeration dehumidifier arranged outside the drying box, the electrothermal efficiency of the dehumidifier can reach more than 8 under the temperature condition, and the circulating air returns to the drying box after heat exchange and temperature rise because the circulating air has already passed through the counter-flow heat exchange of the precooling heat exchanger before the low-temperature heat exchanger of the compression refrigeration dehumidifier.
In the step (6), the humidity of the circulating air in the drying box is controlled by an air-cooling heat exchange dehumidifier arranged outside the drying box, low-temperature air subjected to heat exchange dehumidification through a precooling heat exchanger and the air-cooling heat exchange dehumidifier is subjected to counter-current heat exchange before an air-cooling heat exchanger of the air-cooling heat exchange dehumidifier, and the circulating air returns to the drying box after heat exchange and temperature rise.
The dried honeysuckle obtained in the step (6) has good appearance, water content, fresh flavor, brewing and drinking effects and strong fragrance, and meets the quality requirements of the honeysuckle tea.
Comparative example
And (4) basically repeating the dehydration drying process in the steps (4) to (6), wherein the total hot air circulation is basically the same as that in the embodiment, and the difference is that the internal hot air circulation rate is about 65 percent, the external discharge rate is about 35 percent, cold air is automatically supplemented before hot water heat exchange, and the relative humidity of the circulating hot air is not controlled by a compression refrigeration dehumidifier or an air cooling heat exchange dehumidifier. As a result, the drying time under the three temperature conditions of the steps (4) to (6) is required to be prolonged by 1 to 1.2 hours; the quality and the water content of the dried honeysuckle obtained in the step (6) are basically the same as those of the honeysuckle obtained in the embodiment, but the honeysuckle has slightly poor fresh flavor and brewing drinking effect.
Claims (7)
1. A preparation method of honeysuckle tea comprises the following steps:
(1) picking up honeysuckle buds with anhydrous surfaces before blooming;
(2) deactivating enzyme of flos Lonicerae bud by heating with atmospheric steam for 5-10 min;
(3) uniformly distributing the de-enzymed honeysuckle on a drying sieve tray, loading the drying sieve tray on a truck, and pushing the truck into a drying box;
(4) setting the drying box conditions to 35-45 ℃ and the relative humidity to be lower than 50%, and drying for 2-3 hours under the conditions;
(5) setting the temperature of the drying box to be 45-55 ℃ and the relative humidity to be lower than 40%, and drying for 2-3 hours under the condition;
(6) setting the drying box conditions to be 65-70 ℃ and the relative humidity to be lower than 30%, and drying for 1-2 hours under the conditions;
(7) and discharging the dried honeysuckle, selecting and packaging to obtain the honeysuckle tea.
2. The preparation method of the honeysuckle tea according to claim 1, wherein the surface water-free in step (1) means that dew and rain are not present on the surface of the flower buds of the honeysuckle before picking, or the dew and rain are dried by airing.
3. The preparation method of the honeysuckle tea as claimed in claim 1, wherein the honeysuckle is distributed with a thickness of 3-10mm on a mesh belt or a sieve tray when the honeysuckle is de-enzymed in the step (2).
4. The preparation method of the honeysuckle tea as claimed in claim 1, wherein the honeysuckle on the drying sieve tray in the step (3) is distributed with a thickness of 3-15 mm.
5. The preparation method of the honeysuckle tea according to claim 1, wherein in the steps (4) to (6), the temperature of the drying oven is realized by heating hot air circulating in the drying oven through circulating hot water by a heat exchanger; the circulating hot water is supplied by a hot water boiler and/or a solar water heater, or is realized by heating hot air circulating in the drying box through an air energy heat pump heat exchanger.
6. The preparation method of the honeysuckle tea according to claim 1, wherein in the steps (4) to (5), the humidity of the circulating air in the drying box is controlled by a compression refrigeration dehumidifier arranged outside the drying box, the dehumidifier comprises a low-temperature heat exchanger for evaporating and absorbing heat of a refrigerant and a precooling heat exchanger, the circulating air firstly passes through the counterflow heat exchange of the precooling heat exchanger before the low-temperature heat exchanger, and the circulating air returns to the drying box after the condensing dehumidifying air exchanges heat and is heated.
7. The preparation method of the honeysuckle tea according to claim 1, wherein in the step (6), the humidity of the circulating air in the drying oven is controlled by an air-cooling heat exchange dehumidifier arranged outside the drying oven, the dehumidifier comprises a low-temperature heat exchanger for absorbing heat and cooling air and a precooling heat exchanger, the precooling heat exchanger exchanges heat with the low-temperature air for heat exchange and dehumidification of the air-cooling air in a countercurrent mode before the air-cooling heat exchanger, and the air-cooling heat exchanger returns to the drying oven after the heat exchange and the temperature rise.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102356794A (en) * | 2011-10-16 | 2012-02-22 | 重庆市秀山红星中药材开发有限公司 | Processing method of honeysuckle tea |
| CN104782834A (en) * | 2015-04-03 | 2015-07-22 | 广西大学 | Honeysuckle flower processing method |
| CN107712200A (en) * | 2017-11-14 | 2018-02-23 | 徐天骄 | Lonicera flower tea preparation technology |
| CN108887439A (en) * | 2018-07-26 | 2018-11-27 | 安徽元亨利园林绿化有限公司 | A kind of production method of honeysuckle tea |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102356794A (en) * | 2011-10-16 | 2012-02-22 | 重庆市秀山红星中药材开发有限公司 | Processing method of honeysuckle tea |
| CN104782834A (en) * | 2015-04-03 | 2015-07-22 | 广西大学 | Honeysuckle flower processing method |
| CN107712200A (en) * | 2017-11-14 | 2018-02-23 | 徐天骄 | Lonicera flower tea preparation technology |
| CN108887439A (en) * | 2018-07-26 | 2018-11-27 | 安徽元亨利园林绿化有限公司 | A kind of production method of honeysuckle tea |
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Application publication date: 20210525 |