Method for preparing ultrafine black tea powder by wet-process grinding

A technology of wet pulverization and black tea powder, which is applied in the field of tea pulverization and pulverization to prepare superfine black tea powder, which can solve the problems of high energy consumption, easy loss of nutrients, and poor wettability of tea powder in the drying process of fresh tea, and achieve spray Easy drying, low cost, and improved lubricating taste

Active Publication Date: 2015-02-04
SHENBAO INDAL CORP SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The whole leaf drying process of fresh tea leaves consumes a lot of energy;
[0006] 2. Nutrients are easily lost during the drying process of fresh leaves;
[0007] 3. The water-insoluble dietary fiber of dried tea leaves is tough, and the ultra-grinding process is noisy, time-consuming and labor-intensive;
[0008] 4. The finished tea powder after dry crushing has poor wettability, and it is prone to clumping and difficult to soak.

Method used

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  • Method for preparing ultrafine black tea powder by wet-process grinding

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1) Raw materials: select 10kg of fresh tea leaves grown in the year;

[0044] 2) Withering: adopt natural withering, the thickness of the fresh tea leaves is 4cm, the withering temperature is 25°C, the time is 9 hours, and lightly loosen once during the withering period;

[0045] 3) Kneading: Use the 6CR-55 kneading machine to sequentially knead, lightly knead, heavy knead, and empty knead, and knead for 5 minutes at each stage;

[0046] 4) Primary crushing: Preliminary crushing of the kneading leaves with a rotor kneading and cutting machine, and passing through an 8-mesh sieve.

[0047] 5) Fermentation: Put the first crushed leaves in the fermentation room, break up the tea leaves and lay them flat, the thickness is controlled at 6cm, the indoor temperature is 28°C, the relative humidity is above 90%, and the fermentation time is 30min. The fermented leaves are red in color and have a strong floral and fruity aroma. The fermentation time can be extended appropriatel...

Embodiment 2

[0054] 1) Raw materials: select 10kg of fresh summer tea leaves grown in the year;

[0055]2) Withering: adopt natural withering, the thickness of the fresh tea leaves is 4cm, the withering temperature is 30°C, the time is 16 hours, and lightly loosen twice during the withering period;

[0056] 3) Kneading: Use the 6CR-55 kneading machine to knead for 5 minutes, lightly knead for 5 minutes, heavy knead for 10 minutes, and empty for 5 minutes. After the re-kneading stage was extended to 10 minutes, the color quality of tea powder products was higher.

[0057] 4) Primary crushing: the kneading leaves are preliminarily crushed to below 8 mesh with a rotor kneading and cutting machine, and passed through an 8 mesh sieve. The rotor kneading and cutting machine can crush the kneading leaves by connecting two in series.

[0058] 5) Fermentation: Put the first crushed leaves in the fermentation room, break up the tea leaves and lay them flat, the thickness is controlled at 6cm, the ...

Embodiment 3

[0065] 1) Raw materials: select 10kg of fresh summer tea leaves grown in the year;

[0066] 2) Withering: adopt natural withering, the thickness of the fresh tea leaves is 3cm, the withering temperature is 20°C, the time is 16 hours, and lightly loosen twice during the withering period;

[0067] 3) Kneading: Use the 6CR-55 kneading machine to knead for 5 minutes, lightly knead for 5 minutes, heavy knead for 10 minutes, and empty for 5 minutes.

[0068] 4) Primary crushing: the kneading leaves are preliminarily crushed to below 8 mesh with a rotor kneading and cutting machine, and passed through an 8 mesh sieve. The rotor kneading and cutting machine can crush the kneading leaves by connecting two in series.

[0069] 5) Fermentation: Put the first crushed leaves in the fermentation room, break up the tea leaves and lay them flat, the thickness is controlled at 6cm, the indoor temperature is 26°C, the relative humidity is above 90%, and the fermentation time is 60min. The ferm...

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Abstract

The invention provides a method for preparing ultrafine black tea powder by wet-process grinding. The method comprises the following steps: withering, rolling and primarily grinding fresh tea leaves and then fermenting; carrying out microwave enzyme deactivation to keep primarily-formed tea powder color and luster, and aroma of the tea leaves; mixing the cooled primarily-grinded leaves with a cellulase-pectase solution to prepare a tea water mixed liquid; grinding the tea water mixed liquid for 2-3 times at intervals by using a pipeline type high-shearing grinding machine; carrying out beta-CD burying on the crushed tea pulp; and then carrying out high-temperature instant sterilization, and spraying and drying to obtain the ultrafine black tea powder. The method for preparing the ultrafine black tea powder has low energy consumption and small noises; and the prepared ultrafine black tea powder has less loss of nutrition ingredients, fine powder, good color and luster, good wettability and excellent mouth feel.

Description

technical field [0001] The invention relates to tea pulverizing technology, in particular to a method for pulverizing and preparing superfine black tea powder, which belongs to the technical field of tea deep processing. Background technique [0002] Ultrafine tea powder is rich in functional ingredients such as polyphenols, caffeine, amino acids, vitamins, tea pigments, tea polysaccharides, crude fiber, chlorophyll, and minerals. The ultra-fine tea powder has very small particles, which can be directly drunk or added to various foods. It is easily digested and absorbed by the stomach, and can maximize the physiological effects of tea. [0003] At present, most of the processing of ultrafine tea powder is to process fresh tea leaves into dry tea first, and then use a pulverizer to pulverize them. The main pulverization methods include ball mill pulverization, jet pulverization, impact pulverization and vibration mill pulverization Processing methods. [0004] These technol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/06A23F3/18
Inventor 彭永华李静张啟陈悦水罗龙新
Owner SHENBAO INDAL CORP SHENZHEN
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