What to note in daily operations for centrifeller spray dryers.

The so-called centrifo spray drying tower is the use of centrifeller atomization to dry certain liquid materials, is currently one of the widely used dryers in industrial production.
spray drying is a widely used process in liquid process forming and drying industry.
suitable for the production of powdery, granular products in solutions, emulsions, suspensions and pumpable lake-like liquid raw materials.
so spray drying is an ideal process when particle size distribution, residual moisture content, build-up density, and particle shape meet precise criteria.
Centrifus spray dryer in daily operations need to pay attention to the following things: (1) first turn on the centrifell fan, then turn on the electric heating, and check whether there is a leak, such as normal can be carried out tube body preheating, because the hot air preheating determines the evaporation capacity of the drying equipment, without affecting the quality of the dried material, should be as high as possible to increase the air intake temperature; The valve at the mouth of the unit must be closed, so as not to cool the air into the drying chamber, reduce the preheating efficiency, (3) when the drying chamber inlet temperature reaches the target 180 degrees C to 220 degrees C, open the centrifulation nozzle, when the nozzle reaches a high speed, open the feed pump, add the material fluid, the feed volume should be small to large, otherwise it will produce a mucous wall phenomenon, until adjusted to the appropriate amount.
The concentration of the liquid should be based on the drying nature of the material temperature to ensure good flow of the finished product after drying, (4) the temperature and humidity of the dry finished product, depending on the exhaust temperature, in the course of operation, to ensure that the exhaust temperature is a constant is extremely important, depending on the size of the feed, the amount of feed regulation is stable, the export temperature is not changed.
if the solid content and flow of the liquid change, the outlet temperature will also change, (5) the product temperature is too low, can reduce the amount of feeding to improve the outlet temperature.
the temperature of the product is too high, the opposite is the case.
For heat-sensitive materials with lower product temperatures, the volume can be increased to reduce the exhaust temperature, but the humidity of the product will be increased accordingly; Change, in the exchange pollinator, must first close the above butterfly valve can be carried out, (7) if the dry finished product has moisture absorption, cyclone separator and its pipes, pollinator parts of the application of insulation material wrap, so as to avoid dry finished product moisture absorption.
addition, for materials with low thermal sensitivity and softening point, when the exhaust temperature is too high, the material is softened and the cooling air volume needs to be increased.
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