With the current growth of industrial demand, drying equipments become widely used equipments in many industries. The common rotary dryers on the market currents are triple drum dryer, sand dyrer, slag dryer machine, clay dryer and so on. Drying equipments are widely used in walks of industries in national production and people’s lives, bring great convenience for people’s life and production. According to different classification standards, drying equipments can also be divided into a lot of types.1. According to the drying equipments structure for classification: the dryer equipments can be divided into spray drying equipment, fluidized bed drying equipment, air drying euqipment, rotary drum dryer, various box-type dryers, belt-type dryer and so on.2. According to the drying equipment operation pattern for classification: according to the drying equipment operation pattern can be diveided into intermittent operation and continuous operation.3. According to heat-supply pattern for classification: the drying equipments can be divided into thermal convection drying equipment, conduction heating drying equipments and other dryer equipments.4. According to drying equipment operation pressure for classification: it can be diveded into atomospheric pressure and vacuum drying equipments.Professional rotary dryer manufacturer and supplier, Henan Fote Heavy Machinery Co., Ltd. has provide some advise for improving the rotary dryer working efficiency and choose appropriate drying equipment. Usually we have to consider the following factors.1. hot air temperature. Hot air temperature can also be called drying medium temperature. When Hot air temperature is higher, the more heat energy it contains, and at the same time, hot air relative humidity is lower, and the ability of absorbing water is strong. It is helpful to drying and the drying thermal efficiency is also high.2. the choice of heat source. The coal stove has indirect heating and direct heating. Among them, the indirect heating hot air is clean, but the efficiency is low, suitable for dry the material can"t be melt in smoke dust. And direct heating are dust pollution and affect the quality of products, but the thermal energy utilization is very full and has high thermal efficiency. It is the priority when the drying material mixed a small amount of smoke and little effect in the quality.3. the wet material types. Usually we will divide the material into three kinds, the capillary porous material, the colloidal material and Capillary porous colloid material. Welcome to visit Fote Machinery: [email protected] dung dryer: http://www.ftmmachine.com/products/mobile-crushing-station/84.html