Oxygen-isolating microwave fixation method for high-quality tea

A microwave killing green, high-quality technology, which is applied in the field of tea processing, can solve the problems of unfavorable tea preservation, affecting tea quality, and reducing the aging speed, and achieves the advantages of reducing the generation of organic free radicals, improving the appearance quality, and reducing the aging speed. Effect

Active Publication Date: 2016-04-27
江苏南大耐雀生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Purpose of the invention: In order to overcome the high-temperature deactivation process of tea leaves in the prior art, oxygen will produce non-enzymatic oxidation on polyphenols, amino acids, vitamins and other substances in tea leaves, which will affect the quality of tea leaves. At the same time, thermal oxygen catalysis The generation of organic free radicals stimulates the aging of tea leaves, which is unfavorable to the freshness of tea leaves. The present invention prop

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  • Oxygen-isolating microwave fixation method for high-quality tea
  • Oxygen-isolating microwave fixation method for high-quality tea
  • Oxygen-isolating microwave fixation method for high-quality tea

Examples

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Example Embodiment

[0030] Example 1:

[0031] An oxygen-isolating microwave-sterilizing method for high-quality tea, comprising the following steps:

[0032] (1) Please refer to figure 1 , adopt the microwave fixing device with the inflating and protecting gas device 2 and the vacuuming device 3 to carry out the microwave fixing of tea leaves;

[0033] (2) setting the temperature in the microwave drying warehouse 1 to be 150°C, and preheating the microwave drying warehouse 1;

[0034] (3) after the temperature in the microwave-killing warehouse 1 reaches the set temperature and is stable, put 2.0kg of fresh leaves of Longjing green tea into the microwave-killing warehouse 1, and immediately seal the microwave-killing warehouse 1;

[0035] (4) adopt the vacuuming device 3 to vacuumize the microwave drying warehouse 1 to below absolute pressure 0.01MPa, and adopt the inflatable protective gas device 2 to fill nitrogen in the microwave curing warehouse 1 to the absolute pressure in the microwave ...

Example Embodiment

[0038] Example 2:

[0039] An oxygen-isolating microwave-sterilizing method for high-quality tea, comprising the following steps:

[0040] (1) Please refer to figure 1 , adopt the microwave fixing device with the inflating and protecting gas device 2 and the vacuuming device 3 to carry out the microwave fixing of tea leaves;

[0041] (2) setting the temperature in the microwave drying warehouse 1 to be 120 °C, and preheating the microwave drying warehouse 1;

[0042] (3) after the temperature in the microwave-killing warehouse 1 reaches the set temperature and stabilizes, put 3.0kg of fresh leaves of Longjing green tea into the microwave-killing warehouse 1, and immediately seal the microwave-killing warehouse 1;

[0043] (4) adopt vacuum pumping device 3 to evacuate the degree of vacuum in the microwave drying warehouse 1 to below absolute pressure 0.01MPa, and adopt the inflatable protective gas device 2 to fill carbon dioxide in the microwave drying warehouse 1 to the absol...

Example Embodiment

[0046] Example 3:

[0047] An oxygen-isolating microwave-sterilizing method for high-quality tea, comprising the following steps:

[0048] (1) Please refer to figure 1 , adopt the microwave fixing device with the inflating and protecting gas device 2 and the vacuuming device 3 to carry out the microwave fixing of tea leaves;

[0049] (2) setting the temperature in the microwave drying warehouse 1 to be 180 °C, and preheating the microwave drying warehouse 1;

[0050] (3) after the temperature in the microwave-killing warehouse 1 reaches the set temperature and stabilizes, put 3.0kg of fresh leaves of Longjing green tea into the microwave-killing warehouse 1, and immediately seal the microwave-killing warehouse 1;

[0051] (4) The vacuuming device 3 is used to evacuate the microwave drying chamber 1 to an absolute pressure below 0.01MPa, the protective gas device 2 is used to fill the microwave drying chamber 1 with nitrogen for protection, and nitrogen is continuously suppli...

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Abstract

The invention discloses an oxygen-isolating microwave fixation method for high-quality tea. A theoretical basis and an implementation scheme of oxygen-isolating fixation of tea are put forward initially, in the microwave fixation process, inert protective gas is injected after oxygen isolation, oxygen is isolated while fixation is guaranteed, non-enzymatic oxidation of tea polyphenol, amino acid, vitamins and other nutritional substances in tea is avoided, and meanwhile, production of organic free radicals is substantially reduced; the tea subjected to fixation with the oxygen-isolating microwave fixation method retain nutritional substances in fresh leaves, such as tea polyphenol, amino acid, vitamins and the like, appearance quality such as the appearance, the soup color and the like of the tea is remarkably improved, the finished tea products with low free radical content as an interior characteristic has a longer guarantee period, the ageing speed is greatly reduced, besides, the operation cost is low, the operation is convenient and industrial production can be realized.

Description

technical field [0001] The invention relates to the field of tea processing, in particular to an oxygen-isolated microwave greening technology for high-quality tea. Background technique [0002] Tea is rich in nutrients and curative ingredients that are beneficial to human health. With the rapid development of society and the improvement of people's living standards, people's consumption levels are also increasing, and the demand for high-grade high-quality tea is increasing. For the processing of tea, greening is an important process in the process of tea processing. The quality of greening directly affects the subsequent process of tea, and has a great impact on the shape, color and quality of finished tea. Greening is mainly to rapidly heat up the fresh leaves by heating, inactivate the activity of enzymes (mainly polyphenol oxidase PPO and peroxidase POD), prevent the enzymatic oxidation of polyphenols, and evaporate part of the water at the same time, so that the leaf q...

Claims

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Application Information

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IPC IPC(8): A23F3/06
CPCA23F3/06
Inventor 杨永安魏元刚钟慧易铭金显友
Owner 江苏南大耐雀生物技术有限公司
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