Drying refers to the process of evaporating water in the material under natural conditions or under artificial control conditions. Generally, it can be divided into natural drying and artificial drying. Dry naturally is dried, air-dried, and dried material. Although this kind of drying method is very economic, but there are many insufficiencies, such as slow drying process, moisture is difficult to drop to very low, and the material is easily contaminated. Artificial drying refers to the use of a device that allows the moisture content of the material to drop to a very low level under manual control, which overcomes the disadvantages of natural drying. Artificial drying is often used in modern industrial production, and it has developed rapidly and is used by various industries.
There are many methods for artificial drying. Generally, heating methods can be divided into convection drying, thermal drying, radiation drying, and dielectric heating and drying. At present, China's drying technology and equipment have been developed to four generations, namely the first generation of box-type, bed-type drying, the second generation of spray, roller drying, the third generation of freeze and osmotic drying dehydration, the fourth generation of microwave or radio RF drying, combined drying. Each generation of drying technology and equipment has its own characteristics, suitable for all types of materials, drying, the effect is also different. At present four generations of drying technology and equipment are in use.
In modern industrial production, various types of materials are handled in different ways. Some require only drying, others require mixing and drying, and some require mixing, granulation, etc. Therefore, it is necessary to use dry materials and methods of processing. Select device. Drying equipment develops in the direction of multi-functional and multi-domains. The fluidized-bed drying granulator produced by Jiangsu Changzhou Pinzheng Drying Equipment Co., Ltd. can complete the four operations of mixing, granulating, coating and drying. It conforms to the GMP requirements and is applied in the food, pharmaceutical and chemical industries.
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