Shulou(Shulou.com)05/31 Report--

Hello everyone, Lin Fei to answer the above questions, how much is the frozen dryer, many people do not know the principle of the frozen dryer, now let's take a look at it!

1. Introduction: vacuum freeze dryer is widely used. Bian Xiao takes the tea vacuum freeze dryer as an example to introduce to you. China has a long history of tea culture. Since ancient times, our ancestors have mastered the method of making tea. In modern times, with the progress of technology, we have made great progress in the first-class tea-making technology, especially the arrival of the machine age, which has greatly improved the efficiency of tea-making. Today, Benshaw will introduce you to a vacuum freeze dryer for tea. Let's get to know it together.

2. Working principle: the tea in the appropriate processing stage is sent into the vacuum freeze-drying chamber of the tea vacuum freeze-dryer, first cooled to-18-10, and then limited heating is carried out in the high vacuum state, so that the moisture in the processed tea is directly sublimated from solid ice to gaseous water vapor, and the water vapor is evaporated, so as to achieve the purpose of removing water and drying.

3. In the process of vacuum freeze-drying of tea, the internal and external temperature of tea strip is always controlled at a low level, so that the aroma and nutrients can be preserved to the maximum extent. The dried tea can maintain its original flavor, bright green color and good color, aroma, taste and shape. The drying is uniform and sufficient, and the moisture content of dried tea can even reach less than 3%, which significantly improves the processing quality of tea and prolongs the shelf life of the product. At the same time, because the water in the tea has been frozen before evaporation and drying, many spongy micropores are left in the tea leaves after sublimation, which can hardly be seen by the naked eye. When the tea is brewed, the water will easily seep into the micropores of the tea, which is beneficial to the dissolution of the effective components.

4. operation process: put the tea to be dried one by one into the vacuum drying chamber, close the drying room door, open the refrigeration, open the vacuum, turn on the oil pump, turn on the electric heating, set the temperature, set the time, end the drying, stop the vacuum pump, stop the oil pump, release the vacuum, release the tea, defrost, and proceed to the next step.

5. Application: the conclusion of the study shows that in the comparative experiment between vacuum freeze drying and traditional hot air drying, the oolong tea prepared by vacuum freeze drying has fresh and rich aroma, mellow taste, bright yellow and green color and good quality. it is obviously better than traditional hot air drying.

6. according to the comprehensive evaluation, the quality of vacuum freeze-dried tea is the best, and that of frozen tea is slightly better than that of dry tea. At the same time, it is also found that among the three kinds of dry tea products, vacuum freeze-dried tea has the best appearance compactness. It is found that during the drying process, the particles formed by kneading are scattered, which makes the finished tea particles loose. However, in the process of vacuum freeze drying, the rolled tea particles are in the shape of shrinkage, which is beneficial to the tight knot of finished tea particles, thus reducing the kneading times of Oolong tea particles.

7. The above is Bian Xiao's introduction of the working principle of the tea vacuum freeze dryer and the effect of today's first-class application. I believe that after reading, you have a very clear understanding of the relevant information of the tea vacuum freeze dryer. The emergence of vacuum freeze dryer has greatly improved the efficiency of tea production. At the same time, through the test, it is found that the taste of tea made by vacuum freeze drying mechanism is very good, which is better than the traditional production method. Today's lecture is over. I hope it helps you.

At the end of this article, I hope it will be helpful to you.

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