It consists of three stages, using a fine spray of spray drying equipment or any liquid feed that is dropped during the atomization process, spray contact and suspending hot gas through a stream, allowing liquid to evaporate and remove dry solids, in a similar Atomized droplets of shape and size. Finally, in the passing gas stream, the dry powder material is divided and collected. The omission of dry gas is now considered to meet environmental requirements and will then be emitted within the air, or it can be redistributed within the system.
Another common type of spray atomizing nozzle is hydraulic pressure. Here, the fluid is pressurized by a pump and then forced through a hole to divide the fine droplets in the liquid. The size of the pores ranges from about 0.5 to 3 mm. As a result, a simple nozzle is defined as an entire feed of about 700 kg / h, which is also dependent on the viscosity, pressure, size of the pores and the limited order of solids.
Discarding all of the results of the query through the orifice in smaller droplets and reducing the pressure on the size of the particles for any given feed stream, the nozzle needs to replace a smaller hole. This also requires more pressure from the pump in order to get the correct amount of flow through the injector. There can be as many as 50 nozzles in some large systems, making it difficult to control the size of the particles.
A third method primarily used in small spray drying equipment systems is in two-fluid pneumatic atomization. Where atomization is achieved, an environment interaction is created by the first fluid and the second fluid being compressed 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 kPa can do the job. The size of the particles is controlled by changing the overall proportion of the flow of compressed air flowing through the liquid.
The benefit of this type of atomization can be attributed to the reduced speed level of the liquid leaving the nozzle, which also results in a flight path that requires shorter drying times. In connection with this, the process of two-fluid nozzles has become suitable for use in laboratory and pilot scale drying equipment.