Alternate cooling and heating circulation withering process based on black tea processing

The present invention discloses a black tea processing-based hot and cold alternate circulation withering process, which comprises: 1, laying fresh tea leaves on a placing plate, and carrying out natural withering; step 2, placing the tea leaves in a hollow withering barrel; 3, an air cooler is started, and primary cold air treatment is conducted on the tea leaves; 4, turning off the air cooler and turning on the air heater to perform primary hot air treatment on the tea leaves; the step 3 and the step 4 alternately and circularly work; the problem that tea leaves and the interiors of the tea leaves are heated unevenly and are thin and soft due to the fact that the internal heating change amplitude of the tea leaves is too large due to continuous high temperature or low temperature is solved. 本发明公开了基于红茶加工的冷热交替循环的萎凋工艺，包括以下步骤：步骤一：将新鲜的茶叶铺设在放置板上，进行自然萎凋；步骤二：将茶叶放置在镂空的萎凋桶中；步骤三：打开冷风机，对茶叶进行一次冷风处理；步骤四：关闭冷风机打开热风机，对茶叶进行一次热风处理；步骤三和步骤四交替循环工作；本发明防止茶叶会因持续的高温或低温使其内部的受热变化幅度过大，使得茶叶之间以及茶叶的内部受热不均，出现稀软的问题。