Drying is the process of water evaporation in materials under natural conditions or under artificial control, which can be divided into two categories: natural drying and artificial drying. Natural drying is dry, dried and dried materials. Although the drying method is very economic, but there are many shortcomings, such as the slow drying process, the water is difficult to be very low, and the material is easily polluted. Artificial drying refers to the use of a device under manual control to reduce the moisture content of materials to very low, it can overcome the shortcomings of natural drying. Artificial drying is often used in modern industrial production, so it develops rapidly and is adopted by various industries.
  There are many artificial drying methods, generally by heating can be divided into convective drying, heat conduction drying, radiation drying, dielectric heating drying four categories. At present, the drying technology and equipment in our country have been developed to four generations. That is, the first generation is box type, bed type drying, the second generation is spray and drum drying, the third generation is freezing and osmotic pressure dehydration, the fourth generation is microwave or radio frequency drying and combination drying. Each generation of drying technology and equipment has their own characteristics, suitable for drying all kinds of materials, and the effect is different. At present, the four generation of drying technology and equipment are in use.
  In modern industrial production, the treatment of all kinds of materials is not the same, some only need dry, some need mixed drying, some need mixing, granulating and so on, so the equipment should be selected according to the dry material and treatment. Drying equipment is developing towards multi-functional and multi fields. The fluidized bed drying granulator produced by Jiangsu Changzhou quality drying equipment Co., Ltd. can complete four kinds of operation, such as mixing, granulating, coating and drying. It meets the requirements of GMP, and is used in food, pharmaceutical, chemical and other industries.