Air dispersion uses gas guidance from the perforated plates or vane channels to create a pressure drop and, therefore, equalize the flow in all directions. This gas is thoroughly mixed into the air dispersant, and no temperature gradient is critical in the introduction tube.
Air dispersion uses gas guidance from the perforated plates or vane channels to create a pressure drop and, therefore, equalize the flow in all directions. This gas is thoroughly mixed into the air dispersant, and no temperature gradient is critical in the introduction tube. Therefore, it is important that the inherently produced mixed gas stream is used by any type of water heater, or between the mixing section placement heater and the air disperser. Air dispersers are typically built on top of the drying chamber and the atomizing device is placed at or near the air disperser. This arrangement allows for the instant and complete mixing of heated drying gases and mist clouds. In order to fully understand the dry characteristics of the spray characteristics, it is necessary to inspect the mechanism for drying in a single droplet. In general, there are many small particles suspended in a sphere of liquid. When the droplet is in contact with the hot gas for the first time, rapid evaporation occurs. Dissolving a substance in a liquid forms a thin shell on the surface of the sphere. Although evaporation makes the particles themselves cool, the particles will start to heat as the concentration of the liquid decreases. Evaporation then only requires the liquid to diffuse to the surface of the sphere as soon as possible. The drying process at this stage is called primary drying or diffusion rate limiting.
Fortunately, this stage occurs when the dryer's drying gas is cooler at the dryer outlet temperature. Therefore the solids in each particle are not heated to the outlet temperature of the dryer, even though the protease-specific centrifugal spray dryer can be quite high. The final dry powder will be at a temperature about 20 ° C lower than the air outlet temperature. Plexing equipment extrusion equipment http://
The thermal energy of the hot air is used to evaporate the cooling air to pneumatically transport the dried particles to the system. The contact time of the hot air and the spray droplets are only a few seconds, during which the drying reaches and the temperature drops. The dried granules did not reach the temperature of the dry air. This allows efficient drying of heat sensitive materials without thermal decomposition.
The turbulence inside the protease-specific centrifugal spray dryer, which is very dry, also causes some particles to be exposed to elevated temperatures. This can sometimes result in loss of activity or modification of additives such as binders. Therefore, the test work is recommended for each formulation, and the optimal combination of inlet and outlet temperatures needs to be established relative to further processing of powder activity and performance.
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