Each drying device has its specific application range, and each material can find several drying devices that meet the basic requirements, but only one of them is suitable. Such as improper selection, user besides take unnecessary one-time high purchasing cost, but also in the whole period of using pay a heavy price, such as low efficiency, high energy consumption, high operation cost, product quality is poor, and even could not run normally and so on.
The following is the general principle of the selection of the drying device. It is hard to say which or which are the most important. The ideal selection must be based on its own conditions, and sometimes the compromise is necessary.
Applicability -- -- -- -- -- -- -- 1. The first drying device must be able to apply to specific materials, and meet the basic requirements of the drying material, good processing including material (feed, transportation, fluidization, dispersion, heat transfer, discharge, etc.), and can satisfy the processing, to take off the water, the basic requirement of product quality, etc.
2. The drying rate of high - just the drying rate, only when the convective drying materials are highly fragmented in hot air, the critical moisture content is low, fast drying speed, and with is convection drying, drying methods different critical moisture content is also different, thus the drying rate are also different.
3. The energy consumption is low ------ different drying methods have different energy consumption indexes, and the thermal efficiency of general conduction drying can theoretically reach 100%, and only about 70% of the flow drying can be achieved.