Two-Substance Nozzles

Two-substance nozzles rely on a second medium (compressed air, gas or steam) to supply the energy required for atomisation. The flow speed of the second medium breaks the liquid down into fine droplets. Consequently, the liquid that is being atomised only has to travel at a relatively low flow speed itself. This results in very fine atomisation even in the case of highly viscous liquids or suspensions. Depending on its viscosity, density and surface tension, the liquid that is being atomised can be supplied using suction, a downward slope or pressure. Within certain limits, some two-substance nozzles can also act as injectors. Depending on their design, two-substance nozzles can be categorised as internal-mix or external-mix nozzles.