Each dryer has its specific scope of application, and each of these materials are to be found several kind of device can satisfy the basic requirement of dry, but for only one. 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.
Below are the general principles of the dryer selection, it is hard to say which one or which a few is important, the ideal selection must be according to their own conditions of emphasis, sometimes compromise is necessary.
1.Applicability -- -- -- 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. Low consumption -- -- -- energy consumption index of different by different drying methods and general conduction to the thermal efficiency of drying theory, convection drying can only around 70%.
4. Save investment -- -- -- to complete the same function of drying device, sometimes the cost difference, should choose the person chooses.
5. Low operating costs - equipment depreciation, energy consumption, labor, maintenance, spare parts cost... Such as low operating cost as much as possible.
6. Give preference to simple structure, a sufficient supply of spare parts, high reliability, long life drying device.
7. According to environment protection, good working conditions, high safety.
8. Good selection before make the material drying experiments, a thorough understanding of similar materials have been used drying device (strengths and weaknesses), often help the appropriate selection.
9. Do not rely solely on past experience, pay attention to absorb new technology, more listen to the opinions of the experts.
