The spray dryer is a kind of continuous atmospheric pressure dryer. During the use of the equipment, the liquid material is sprayed into mist, so that the hot air can be contacted and dried. It is mainly used to dry some heat-sensitive products. Liquids and viscous liquids are also used for drying fuels and soap powders etc.
The biggest advantage of the spray dryer is energy saving. The specific energy saving measures are mainly reflected in the following aspects:
Increase the temperature of the drying medium out of the air inlet. According to the statistics of the test data, it is found that if the temperature of the drying medium at the feed inlet is appropriately increased, the thermal efficiency can be effectively improved. The level of increasing temperature needs to be decided according to the nature of the product.
Lower the outlet air temperature. When the outlet air temperature is too high, it is undoubtedly not conducive to energy saving and emission reduction. After statistics, we found that it is more economical to lower the outlet air temperature than to increase the inlet air temperature. The adjustment of the outlet air temperature needs to refer to the moisture content of the material.
Reduce evaporative load. The evaporation load of the spray dryer is too large, indicating that the solid content in the material is low. This will greatly reduce the thermal efficiency of the dryer. Appropriately increase the solid content of the feed liquid to reduce the evaporation load of the spray dryer.
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