Green tea processing technique with combination microwave water removal and freeze drying

Abstract

The invention discloses a green tea processing technique with the combination of microwave water removal and freeze drying. The green tea processing technique comprises the following steps of: putting graded fresh leaves into a microwave water-removing machine for water removal; shaping the leaves after the water removal; putting the well-shaped tea leaves into a freeze drier for freeze drying; and after the drying, increasing the fragrance of the tea leaves by using far infrared rays to finally prepare the finished product of the tea leaves. The prepared green tea is obvious in bitterness removal, is yellow, green and bright in color and luster, and has flat, straight, green, moist, fresh, alive and uniform strips; and the product has high rehydration, and the content can be dissolved out easily during tea brewing. The green tea processing technique has high automatic control level, performance reliability, process coherence and stability, and is energy-saving and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of tea processing, and in particular relates to a process for processing green tea by combining microwave deenzyming and freeze-drying. Background technique [0002] The production of traditional famous and high-quality tea has a low degree of mechanization, many production links, labor and energy consumption, and safety and sanitation cannot be guaranteed. [0003] The traditional greening of tea leaves is conducted to the tea leaves through a heating roller, which is prone to uneven heating and easy to dry outside and damp inside. It is easy to produce burnt leaves, burnt edges and debris, which seriously affects the quality of tea. However, in the traditional de-enzyming and drying method, the tea stays in the drum de-enzyming machine and dryer for a long time, and the nutritional components are lost more. [0004] There are also some manufacturers who have adopted microwave deenzyming technology, but t...

AI Technical Summary

Problems solved by technology

[0005] The invention discloses a green tea processing technology which combines microwave de-enzyming and freeze-drying to de-enzyme and dry tea leaves. By adopting the process of the invention, the water content after microwave de-enzyming is reduced to about 50%, which reduces the heat load of subsequent freeze-drying. It solves the problem of incomplete dehydration by microwave alone, and overcomes the shortcomings of low speed, long time and high energy consumption of single-use freeze-drying; the green tea produced has obvious bitterness and astringency, bright yellow-green color, flat and straight, green tea Moisten fresh and even, the product has good rehydration, and the content is easy to dissolve when brewing tea