Spray separators, desired droplet size

Stream. The swirl flow also increases the turbulence level which is conducive to good atomization. Okamoto et al. [12] applied the swirl technique to a dual-stream injector to enhance the spray atomization characteristics of an injector. This dualstream injector was fabricated by installing a special adapter on a swirl-type, singlestream injector. As the swirl number increases, the droplet size becomes smaller, and the separation of the two sprays is increased, thus increasing swirl, which enhances the desirable characteristics of the spray. From the standpoint of spray separatiOTi, the adapter is one of the basic requirements for the dual-stream injector. 

There are other comments to be made about this type of application. The liquid spray nozzle should supply liquid to the face of the mixing elements without appreciably wetting the vessel wall. A 30° full cone nozzle is typically used. Ideally, the spray should consist of droplets in the range 1000 to 2000 p-m range. A quick review of spay nozzle literature indicates that the appropriate spray nozzle for 44 gal/min of alkaline water would operate at about 100 psi pressure drop. Multiple nozzles could be used if a lower liquid-side pressure drop is desired. Fine atomization spray nozzles should be avoided since fine spray drops are difficult to separate in downstream mist eliminator equipment. A Alter or strainer should be installed on the liquid feed to prevent plugging the feed nozzle, especially if the nozzle orifice size is small. 

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