Welcome to visit Beijing Songyuan Huaxing official website!
E-mail: sales@bjsyhx.com.cn
Product List
Breaking News
What are the advantages of a laboratory freeze dryer used in a laboratory over conventional methods?
The laboratory freeze dryer uses the physical principle to freeze the moisture in the compressed air to below the dew point, so that it can be precipitated from the air....
Analysis on the drying principle of freeze dryer
I believe everyone is familiar with freeze dryers. Such a machine that integrates freezing and drying has been favored by most experiments. The principle of freeze drying of freeze dryers is actually not complicated. Freezing and drying are divided into two processes. ...
How to properly maintain an industrial vacuum freeze dryer?
Industrial vacuum freeze dryer is composed of refrigeration system, vacuum system, heating system, electrical instrument control system. ...
What is the control system of industrial vacuum freeze dryer?
The control system of industrial vacuum freeze dryer is the command mechanism of the whole machine....
Analysis of periodic inspection and maintenance methods of pilot freeze dryer
Repair and eliminate the leakage and failure of the refrigeration system, vacuum system and heating system, and check whether the indicators of the pilot freeze dryer are in a normal state;...
Contact Us
Beijing Songyuan Huaxing
Service Line:+86-13161061291
Song Yuan:+86-13161061291
Address:C706 Changyin Building, NO.88 Yongding Road, Haidian District, Beijing, China
Your Location: Home >> News >> Technical support >> Analysis of technical problems of freeze-dried fruits

Analysis of technical problems of freeze-dried fruits

Release Date: 2018/11/20 17:20:56 .
Browse: 403

  Analysis of technical problems of freeze-dried fruits
  Fruit is a kind of food with high added value, and freeze-dried fruit will have a very broad market prospect. However, at present, the development of freeze-dried fruits using freeze-drying machines has encountered bottlenecks. The reasons for this are mainly the following three reasons.
  First, the difference between different fruits is relatively large
  There are many kinds of fruits, even if they are similar fruits, if the growing environment is different, the climate will be different, which will cause great differences. Therefore, the technical parameters of the fruit freeze-drying process are difficult to categorize and set a unified standard process. If different kinds of fruits have different enzymes, their color protection process is very different, and the fruit is also very particular. The different thickness of the plate will cause the quality of the dried products after zui to be different. Choose a specific freeze-drying process for different fruits.
  Second, the freeze-drying process takes a long time and consumes a lot of energy
  Vacuum freeze drying is considered to be a dry method that is expensive for zui. The cost of vacuum freeze-dried food is about 5 to 7 times that of hot air drying, 7 to 8 times that of quick-frozen food, and 7 times that of spray drying. The pre-freezing energy consumption in the vacuum freeze-drying process only accounts for 4% to 14%, and the total energy consumption of the vacuum pump, heating plate and cold trap during the drying process accounts for 86% to 96%. Due to the high investment cost of equipment and high energy consumption in the production process, some manufacturers are discouraged and restrict the practical application and development of freeze-drying technology.
  Third, the appropriate technical parameters are more difficult to determine the parameters of the vacuum freeze-drying process, which has a decisive impact on the quality of freeze-dried fruit. The freeze-drying process, including pre-freezing, primary drying, secondary drying and storage stages, is a fairly complex heat and mass transfer process; and these processes are closely related to the nature of the fruit. Therefore, it is necessary to determine a variety of thermophysical properties of fruits, to understand the factors affecting heat and mass transfer during the freeze-drying process, in order to develop a reliable procedure, using an optimized freeze-drying control process to produce high-quality freeze-dried products.
  However, the freeze-dried fruit is fast-frozen, vacuum-dehydrated, preserves the original color, aroma, taste, nutrients and the appearance of the original material, and has good rehydration, and does not contain any additives, it is ideal. High-end foods that are natural and hygienic. As food safety issues become more serious, the space for subsequent development is beyond imagination. 

share to:
Songyuan Freeze Dryer logo
Address:C706 Changyin Building, NO.88 Yongding Road, Haidian District, Beijing, China
Email:sales@bjsyhx.com.cn Facebook:SYHXfreezedryer