Tea machinery is the foundation of the tea industry, and the two complement each other. The development of the tea industry drives the development of tea machinery, and every step of the tea machinery can play an important role in promoting the tea industry.
What are the people most afraid of drinking tea? First of all, nothing more than oolong tea has bitterness, astringency and miscellaneous taste. Secondly, it is the best tea. It is not the taste after drinking the tea season. Nowadays, these two problems can be easily solved by using the tea microwave freeze-drying sterilization equipment developed by Anxi Yunhe Machinery Co., Ltd.
The tea microwave freeze-drying sterilization equipment developed by Anxi Yunhe Machinery Co., Ltd. was officially mass-produced in May this year. Using this equipment to kill and dry tea, not only can effectively remove the bitterness, cockroaches and miscellaneous taste of oolong tea, it can preserve the original juice and original flavor of tea, and retain nutrients such as vitamins and chlorophyll. The shelf life of tea can also be preserved. It is even more rare to extend it to one year or so. And this set of equipment is also suitable for green tea processing.
Recently, the reporter came to Anxi Yunhe Machinery Co., Ltd., the general manager of the company, Lin Qingjiao, showed the reporter a set of two-machine microwave microwave freeze-sterilizer. "The innovation of our equipment lies in microwave and The application of vacuum freeze drying technology." Lin Qingjiao said.
Microwave killing takes only 3 minutes
The use of vacuum drying equipment to treat tea is a major reform of tea machinery. At present, vacuum drying equipment generally uses electric heating, diesel heating, alcohol heating, etc. to supplement the sublimation heat. These methods are carried out by conduction because of the vacuum. In the state, there is almost no convection phenomenon and convective heat transfer mode, and the use of conduction to supplement the sublimation heat makes the time required for drying prolonged, the speed is slow, the energy consumption is large, and the processing cost is increased.
"We have been working on the use of microwaves in the production of tea machinery since 2001." Lin Qingjiao said that they are interested in the transparency of the medium. When heating objects, they do not need any media. The characteristic of simultaneous heating inside and outside the object. Coincidentally, at that time, the Tea Department of the College of Horticulture of Fujian Agriculture and Forestry University also had a group of experts studying the application of microwave in tea machinery. After the two sides met, they quickly decided on the related issues of cooperative development.
"The advantage of microwave sterilization is that it is fast and efficient, and because of the short time, the organic matter loss of tea is also less, so the quality of tea will be guaranteed, and the tea will not be astringent because of the production time is too long." Say. So how fast is the speed of microwave killing? According to domestic and foreign data, its speed and efficiency are 4 to 20 times that of conventional heating methods. Specifically, the fermented tea leaves are sterilized by microwaves, which can be completed in 3 minutes. At present, no other related equipment has been found to achieve this speed.
"Space Food Processing Law" to make oolong tea
After successfully introducing microwave into the tea killing machine, Lin Qingjiao began to think about how to better preserve the nutrition and freshness of tea. After reviewing a lot of information, he decided to try vacuum freeze drying technology.
Vacuum freeze-drying (English "Freeze Dried", referred to as "FD"), began in the early 20th century. As early as during World War II, the wounded on the battlefield required a large amount of plasma, which was a big headache because it was not easy to transport and store. The FD technique is used to dehydrate the plasma, which is light and easy to carry. When necessary, physiological saline can be injected to activate the cells and fresh plasma is delivered to the wounded. Later, FD was widely used in biomedical and aerospace industries. In the 1960s, the United States applied this technology to produce freeze-dried food as an astronaut space food. In the 1970s, with the acceleration of industrialization, FD products and equipment entered the era of industrial production, and were mainly used in medicine, beverages, and food. And low temperature dehydration and drying of agricultural and sideline products. Since this technology was recognized by the public as an astronaut space food processing law, everyone also referred to FD as the "space food processing law."
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