Classification of drying equipment

Now, there are many kinds of drying equipment, in order to facilitate the distinction, people will be drying equipment into a variety of categories, drying equipment, there are many ways to classify, summed up in the following categories:

1, according to the operation mode classification

   According to the operation mode of drying equipment can be divided into two categories: intermittent operation and continuous operation. But some drying equipment can have intermittent and continuous two kinds of operation, and some drying equipment can only have one kind.

2、Classified according to operating pressure

   According to the operating pressure, it can be divided into two categories: normal pressure type and vacuum type. Atmospheric pressure drying equipment can use any one or several forms of heat transfer at the same time, while the vacuum drying equipment is characterised by conduction heat transfer and radiation heat transfer mostly, most of them are mainly generated intermittently, and the vacuum drying equipment is mainly used to deal with heat-sensitive materials and materials with solvent recovery.

3、Classification according to the state of the material to be dried

   The common state of the material to be dried can be divided into block, strip, granular, paste, cake, fibre, solution or slurry, etc. In many cases, the original state of the material determines the shape of the drying equipment.

4、Classification according to the type of drying medium used

   Convection heat transfer can be divided into air, flue gas, inert gas, superheated steam for drying medium drying equipment. Conduction heat transfer can be divided into thermal oil, steam, hot water and so on.

5、Classified according to the heat transfer method

   According to the classification of heat transfer can be divided into convection heat transfer drying equipment, conduction heat transfer drying equipment, other such as radiation heat transfer and a variety of heat transfer drying equipment.

6、Classified according to the structure of drying equipment

   According to the structure of drying equipment can be divided into fluidised bed dryer, rotary cylinder dryer, belt dryer, spray dryer, airflow dryer, various box dryer, drum dryer and so on.

7、Classification according to the heat transfer process of drying equipment

   A classification method, the drying equipment is divided into two categories, five small categories. Two categories are adiabatic drying process and non-adiabatic drying process. Adiabatic drying process can be divided into two categories: one is a small particle material drying, such as air dryer, spray dryer, moving bed dryer, spray dryer and rotary circular dryer, etc.: the second is a lump material dryer, such as multi-layer and belt dryer, box dryer in the tunnel dryer, etc.. Non-adiabatic drying process can be divided into three subcategories: vacuum drying, conduction heat transfer drying, radiation heat transfer drying, which is characterised by non-adiabatic system.