Microwave Drying Machine There are two main drying methods: freezing method and adsorption method. Refrigeration dryer is a kind of equipment that manually cooling compressed air to remove water vapor, so as to obtain relatively dry compressed air. The principle of adsorptive dryer is that some adsorbents (such as alumina, molecular sieve, silica gel, etc.) with adsorptive properties are used to adsorb water in compressed air, so as to reduce dew point temperature of compressed air and achieve high quality compressed air.
Insect Microwave Drying Machine
It is a kind of mechanical equipment that uses heat energy to reduce material moisture.Drying the object. Dryer Moisture in material by heating(generally referred to as water or other volatile liquid components) vaporized and escaped to obtain solid materials with specified moisture content. The purpose of drying is to meet the needs of material use or further processing. For example, the wood drying before making wood models and wooden ware can prevent the products from deforming, and the drying of ceramic blanks before calcination can prevent the finished products from cracking. In addition, the dried materials are also convenient for transportation and storage, such as drying the harvested grain to a certain moisture content below, in order to prevent mildew. As natural drying is far from meeting the needs of production development, various mechanized dryers are more and more widely used.
In order to save energy, some materials with high moisture content, suspensions or solutions containing solid substances are usually dehydrated mechanically or evaporated by heating, then dried in a dryer to obtain dry solids.In the drying process, heat and mass (moisture) should be transferred simultaneously to ensure that the wet vapor partial pressure (concentration) on the surface of the material is higher than that in the external space, and that the temperature of the heat source is higher than that of the material.
The intergeneric wall transfers heat to the wet material, and the generated wet steam can be removed by vacuum suction, a small amount of purge gas or condensation on the surface of a cryogenic condenser set separately. This kind of dryer does not use drying medium, has high thermal efficiency and is not polluted, but its drying capacity is limited by the heat transfer area of metal wall, and its structure is complex, so it is often operated in vacuum. Radiation dryer uses various radiators to emit electromagnetic waves of a certain wavelength range, which are selectively absorbed by the surface of wet materials and then converted into heat for drying. High frequency electric field is used to dry wet materials with thermal effect. According to the movement of wet material, the dryer can be divided into fixed bed, stirring, spray and combination. According to the structure, the dryer can be divided into box dryer, conveyor dryer, drum dryer, vertical dryer, mechanical stirring dryer, rotary dryer, fluidized bed dryer, airflow dryer, vibrating dryer and spray dryer. And the combination dryer and so on. The future development of dryer will be based on in-depth study of drying mechanism and material drying characteristics, mastery of the optimal operating conditions for different materials, development and improvement of dryer; in addition, large-scale, high strength, high economy, as well as improvement of adaptability to raw materials and product quality are the basic trend of dryer development; at the same time, further research and development of new high efficiency and adaptability will be carried out. Special requirements of dryers, such as combination dryer, microwave dryer and far-infrared dryer.
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