Desuperheaters reduce the temperature of superheated steam to its saturation point for optimal heat transfer and efficiency.
In many manufacturing processes, steam is initially superheated and distributed at high-pressure to prevent the formation of condensate droplets. In the case of turbine applications, droplets can cause significant damage to turbine blades. In downstream applications cooler steam is needed. Desuperheaters inject cooling water to cool the steam to its saturation point for optimum heat transfer in these applications.
SPRAY TYPE
Cooling water direct injection
Max turndown ratio 2:1
Low pressure drop
Constant steam load applications
Simple, low cost
VENTURI TYPE
Jet port injection
Max turndown ratio 10:1
High-pressure drop
No high-pressure steam or cooling water needed
EJECTOR ATOMIZING TYPE
Atomized mixing chamber
Max turndown ratio 50:1
Medium pressure drop
Optional control package
1.5X process steam pressure required