Development History and Development Trend of Dryer

- May 08, 2019 -

< P > Since ancient times, human beings have struggled with nature to survive. People are accustomed to using solar energy and natural ventilation to dry grain for storage. Although this method is energy-saving and environmentally friendly, its production efficiency is low. If we encounter wet and rainy weather, we have to collect grain manually, which wastes a lot of labor. Dryers cannot enter the countryside because they are expensive and the income of grain is extremely low.

With the development of the times, more and more people go out to work in the countryside, instead of working at sunrise and sunset as before. The rational distribution of labor force and the centralized use of land will become a trend of China's development. The past year's income in the countryside can not only support the family, but also fill in some articles for the family and so on. Now, after a year of hard work, the traditional wheat and maize income is just enough to feed and clothe. How ironic it is for the society that the house price in the city keeps rising and the family's income can't afford to buy a square house. So people choose to go out to work, the concentration of land use rights will also become a sign of social progress. The centralization of land, the production of crops, the efficiency of traditional air-drying is very low, so dryer instead of traditional air-drying is a trend. With the development of production technology, more and more drying equipments appear. Manual controllable heat source and mechanical ventilation dehumidification gradually replace the old method, and the effect is becoming more and more prominent. According to the operating pressure of the dryer, it can be divided into two types: normal pressure drying equipment and vacuum drying equipment. In this paper, the industrial control network will focus on the analysis of the development of vacuum drying equipment.

What is a vacuum drying equipment?

Vacuum drying equipment is specially designed for drying heat sensitivity, easy decomposition and oxidizable substances, which can fill inert gas into the interior, especially for some articles with complex components. Oxygen content is low when drying under low pressure, which can prevent oxidative deterioration of dried materials, and can dry flammable and explosive dangerous goods; can vaporize moisture in materials at low temperature, and can easily dry heat-sensitive materials; can recover valuable and useful ingredients in dried materials; can prevent the discharge of toxic and harmful substances in dried materials, and can become an environmental protection type of "green" drying. The first continuous vacuum freeze drying equipment in China was developed by Shenyang Institute of Refrigeration Technology in 2000. The vacuum chamber adopts rectangular structure, and there are separators between the inlet and outlet silos and the drying silos. There are automatic weighing systems in the inlet and outlet silos, which can judge the drying rate, water output and final drying degree of freeze-dried food. Two external water catchers work alternately to achieve continuous water catching and ice melting. After more than ten years of development,

drying equipment industry in China has begun to enter a mature stage, which can better meet the actual needs of users in various fields. In view of the advantages of "green" vacuum drying equipment, its application is increasingly widespread. In the field of food and drug drying, the demand for larger vacuum drying equipment will gradually increase, and the market prospects are very huge. However, on the overall level, the development of vacuum drying equipment is relatively slow, and the technical level and use concept are relatively backward. The development of vacuum drying equipment is unbalanced

In the field of crop drying, continuous vacuum drying equipment plays an important role, but the amount of grain drying is very large, continuous drying equipment must be used, and the cost of vacuum drying is too high, so the frequency of using vacuum drying equipment in agriculture is not high.

In the field of food drying, food raw materials are abundant, and the output of products requiring freeze-drying is very large. Continuous freeze-drying equipment for food appeared earlier than vacuum drying equipment. CONRAD-800 type continuous freeze-drying equipment was produced by Danish ATLAS Company in 1985 for the production of freeze-dried coffee, which also means that vacuum drying equipment has no advantage in time. From the above, we can see that the development of vacuum drying equipment is not balanced. Especially for our domestic products, it is more necessary to strengthen research and development in technology. At the same time, it is also necessary to expand the promotion of products, so that consumers can understand and deeply understand the products, so that their use can be more comprehensive. Henan Microwave Equipment Co., Ltd. specializes in the production of dryer equipment, drying equipment, pharmaceutical drying equipment, chemical drying equipment, microwave equipment, electric oven and so on. It is the only professional manufacturer engaged in the development and production of super-large industrial microwave dryer equipment in China. Official website: , free hotline: 400-779-7276.

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