Method for jointly drying Chuzhou chrysanthemum flowers by steam fixation and heat pump microwaves

Abstract

The invention discloses a method for jointly drying Chuzhou chrysanthemum flowers by steam fixation and heat pump microwaves. The method comprises the following steps: selecting damage-free and disease-free Chuzhou chrysanthemum flowers, grading according to sizes and colors, cleaning the Chuzhou chrysanthemum flowers, filtering to remove water for later use; placing the Chuzhou chrysanthemum flowers in a fixation tray, performing fixation by using saturated vapor, placing the Chuzhou chrysanthemum flowers in a drying tray, performing dehumidification drying in a heat pump drying oven; placing the Chuzhou chrysanthemum flowers in a softening device to ensure that petals and buds of the Chuzhou chrysanthemum flowers are consistent in water, placing the Chuzhou chrysanthemum flowers in a microwave dryer; and sorting and packaging the dried Chuzhou chrysanthemum flowers. The method is high in heat pump heat efficiency and little in energy consumption, short in Chuzhou chrysanthemum flower drying period which is within 10h, and high in working efficiency; the Chuzhou chrysanthemum flowers are dried under a low-temperature environment which does not exceed 50 DEG C, the obtained Chuzhou chrysanthemum flower product has a good flower type, yellowish color and little nutritional ingredient loss; the aerobic bacterial count of the finished Chuzhou chrysanthemum flowers is less than 3000cfu, so that the finished Chuzhou chrysanthemum flowers are safe and sanitary.

Description

technical field [0001] The invention belongs to the field of agricultural product processing, and in particular relates to a method for drying green chrysanthemums by combining steam with heat pump and microwave. Background technique [0002] Chu Ju ( Chuju Chrysanthemum morifolium ) is the inflorescence head of the genus Chrysanthemum in the family Asteraceae, which can be used as tea or medicine after drying. It is a characteristic agricultural product in Anhui Province and has passed the certification of China's famous brand agricultural products and geographical indication products. [0003] Chu chrysanthemum often adopts natural drying, hot air drying, microwave drying and other methods. Chu chrysanthemum is a heat-sensitive material. During processing, volatile components will be lost when heated, and flavonoids will be easily oxidized. The natural drying method is simple and easy to implement, but the required drying time is too long, and it is easily restricted by ...

AI Technical Summary

Problems solved by technology

The natural drying method is simple and easy to implement, but the drying time required is too long, and it is easily restricted by natural conditions, which affects the quality of dried chrysanthemums, and even causes mildew and rot.

Patent 200910185783.4 proposes a sulfur-free steam-heating and hot-air combined drying method for chrysanthemum chrysanthemums. The hot-air drying temperature is above 60°C. The resulting product has yellow color, large loss of volatile oil components, and poor product shape. At the same time, in actual production, hot-air drying is difficult. To reduce the water content of chrysanthemum to less than 15%, the chrysanthemum needs to be exposed to the sun or dried by secondary hot air to make the chrysanthemum reach a safe moisture content.

Patent 200910185784.9 proposes the coupling drying method of chrysanthemum with sulfur-free microwave killing and drying, patent 201110132725.2 proposes a microwave vacuum drying method for chrysanthemum, and patent 201110085727.0 proposes a microwave vacuum heat pump combined drying method for chrysanthemum, but microwaves directly dry chrysanthemum Flowers are prone to petal scorch, petals and stamens are easy to scatter, etc. At the same time, microwaves require a lot of power to remove a large amount of water, and the machine itself generates serious heat, which is not conducive to industrial production.

Chu chrysanthemum stamens are large and thick, so it is difficult to dry quickly; Chu chrysanthemum petals are narrow, long and thin, and easy to lose water; these two characteristics of Chu chrysanthemum make it difficult to dry Chu chrysanthemum at one time, which limits the development of Chu chrysanthemum drying technology

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