Microwave Theory and Application of powdered dry sterilization 

 Uses: powder, granular materials dehydration. Conventional heating, such as flame, hot air, electric, steam drying is the principle of heat conduction, the heat from the interior to be heated outside of the pass, gradually make the body temperature is raised, known external heating. To achieve the required temperature of the center will take some time, poor thermal conductivity of the time required for longer objects. The traditional drying methods for a long time, power consumption, heat is not uniform, flip up and down, labor intensive, and microwave energy drying characteristics, microwave can penetrate both inside and outside the object within the heating, frequency of 2450MHZ, 2.4 billion per second 5 million times in the oscillation of water molecules are also 24 million 5 million times in the oscillation, the molecular heat of friction between each other, their own heat. Therefore, chemical products can be widely used in the dry powder material dehydration. For example: cobalt oxalate, lithium hydroxide, nickel hydroxide, the pure nectar, APT, lithium cobalt oxide, etc., the water content from 40% to 0.5% after drying, drying time of only 5 to 6 minutes, the drying temperature can be controlled at 80 ℃ ~ 90 ℃. 

 Microwave drying characteristics: 
 1, the selective heating. Because the microwave absorption of water molecules is best, so most of the high water content, water absorption of microwave power over the lower part. This is the selective heating characteristics, the use of this feature can be uniform heating and uniform drying. 
 2, energy efficient. Microwave is a direct function of the material were thus no additional heat loss, and the corresponding air furnace will not heat the container, so the high thermal efficiency, the production environment is significantly improved, compared with the far-infrared heating can save 30% . 
 3, time is short, and high efficiency. Microwave heating is to be heated as heating element object itself, does not require heat transfer process. Microwave penetration from all directions inside and outside the object within a very short period of time while making the object to achieve uniform heating, greatly reducing the drying time. 
 4, easy to control, and advanced technology. Compared with the conventional method, which means that the use of equipment; no thermal inertia, operational flexibility; microwave power adjustable, the transmission speed is adjustable. In microwave heating, drying, no water, no emissions, is a safe and sound tech.