1.The
capacity of adapting to drying material, e.g. whether the dry can
achieve the required drying degree; the uniformity degree of
drying products
2.No
damage to products quality. Because some products require
maintaining crystal shape, color; some require no deformation or
cracking in drying process.
3.Thermal
efficiency level (In general, making good use of drying device
can have high thermal efficiency, in contrary, it is low). And
this is the main technical and economic indicator of
drying.