The spray dryer consists of three stages, using the fine spray of the spray dryer or any liquid feed in the atomization process, the spray contact and the suspended hot gas passing through a flow, allowing the liquid to evaporate and removing the dry solid, in the similar shape and size of the atomized droplets. Finally, the gas flow is divided into dry powder substances and collected. Eliminating the drying gas is now considered to meet environmental requirements and will then be emitted into the air, or it can be redistributed within the system.
  The key options of atomization can be used in various types of spraying, including centrifugal, acoustic atomizing nozzles and air.
  The particle size distribution is almost constant on the medium, and in any given method, the method is used for atomization. The roofing medium itself may change from as small as possible to 15 microns to 250 microns, but it is greatly dependent on the amount of energy that has been sent to the liquid. In addition, mass flow, solid content, viscosity and surface tension have a direct impact on the particle size, but not on the degree of circumferential speed of the wheel. Therefore, the increase of the feed rate may also increase the size of the particles, but the use of a variable speed centrifugal atomizer can be convenient for the size of the specified correction.
  Another common type of jet atomizing nozzle is hydraulic pressure. Here, the fluid is pressurized through the pump and then forced to pass through the hole to divide the droplets in the liquid. The pore size ranges from about 0.5 to 3 mm. The result is that a simple nozzle is defined as the whole feed of about 700 kg / h, which is also dependent on the solid content and the finite order of the holes in the viscosity, pressure, size.
  Discarding all the query results through the throttle in the smaller droplets and reducing the increase in the size of any given feed flow, the nozzle needs to replace a smaller hole. It also requires greater pressure from the pump in order to obtain the right quantity through the flow of the ejector. Some large systems can have as many as 50 nozzles, which makes it difficult to control the size of particles.
  The third main method used for small spray dryer system is the dual flow pneumatic atomization. Atomization is achieved by creating an environmental interaction between the first fluid and the second fluid which is normally compressed into the air. In this case, neither the pressure of the air nor the requirement of the liquid is very high. Perhaps, a typical range of 200 to 350 thousand PPA can be done. The size of the particles is controlled by changing the overall proportion of the compressed air flow of the liquid flow.
  This type of atomization a great benefit can be attributed to the lowering of the velocity level of the liquid in the departure from the nozzle, which also leads to the flight path, requiring shorter drying time. In this connection, the dual fluid nozzle process becomes suitable for use in laboratory and pilot scale equipment.