【Help】Does anyone know anything about spray drying?
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Will the viscosity of the material before spray drying affect the particle size of the material after spraying?
Yes, I’ve seen this done before. To control viscosity, it’s usually necessary to regulate the temperature before spraying. The speed and temperature of the spray dryer can be part of a control loop (assuming that the maximum allowable concentration can be achieved), which helps to save energy.
When the temperature is low and the viscosity is high, the rotation speed of the spray centrifuge must be higher; otherwise, it is easy for the material to stick to the walls and the particle size will increase, and vice versa
When the speed of the sprayer is high, the material becomes very fluffy, especially when its temperature is high. However, during adjustment, it’s better to keep the speed high; it’s better to reduce it gradually rather than lowering it too much, as the material sticking to the walls can be extremely unpleasant to deal with. I’ve used this thing for a few months; feel free to ask me if you have any questions
Factors such as viscosity, feed rate, and exhaust gas temperature are key parameters that affect particle size.