Tea fixation

The ultimate purpose of the green tea fixation method is to inactivate the enzyme activity, taking into account both water loss and shape. Taking shape (straight, flat, curly, granule) as the guide and adopting different fixing methods to finish green is the key to achieve high-efficiency green tea fixation production.

1. Potential problem

(1) The use of dehumidification of the drum tea fixation machine is not clear.

(2) The solidification effect is not obvious after the green needle tea shaping is finished.

(3) There is a large amount of steam in steam fixing, and the smell of water is prominent.

(4) Steam-heated tea fixation, due to the uneven thickness of the leaf layer, local scorch, which affects the subsequent processing.

(5) Timely cooling treatment for tea leaf after tea fixaton is ignored.

(6) The long-term accumulation and resurgence brought about by the overweight of the tea fixation lead to the deterioration of the quality.

2. Solution

(1) The use of the dehumidification device in the dehydration process is adjusted according to the tea enzymatic effect. When the enzymatic degree is not enough, the dehumidification shall be stopped, and the hot and humid steam shall be used for smothering to achieve supplementary tea enzymatic. On the contrary, if the effect of tea enzymatic is better, the action time of damp-heat steam should be reduced to avoid the effect of damp-heat and insufficient loss of green gas.

(2) The needle tea roasting machine usually has the function of shaping. After the fixation of the strips, the parameters such as the temperature and the inclination angle of the equipment should be adjusted according to the performance of the equipment, so as to prolong the frying time and realize the shape shaping.

(3) Adjust the amount of steam to meet the requirements of tea fixation while avoiding the effect of damp heat caused by excessive steam.

(4) Control the uniformity and thickness of the withering tea leaf

(5) The tea leaves after fixation should be cooled in time to avoid accumulation. In this link, cooling and screening equipment can be used to achieve cooling and screening effects.

(6) Avoid over tea fixation and the deterioration of accumulation quality caused by long-term accumulation and resurgence.

In view of the characteristics of low temperature and high humidity in the spring tea season, our company has also improved the above series of green tea enzymatic machines. Make them more suitable for the production of spring tea.