Flash separators are used for handling condensate and flash steam recovery. It uses a tangential inlet and cyclonic action to instantly separate steam and condensate. These are available in many different sizes depending upon the condensate requirements.
Flash tank is a pressure vessel, often vented to atmosphere that contains steam produced from hot condensate under pressure that enters the tank. It allows high-pressure condensate to flash and to reduce pressure steam. Flash tank is used to reduce and cool the steam to low pressure before re-introducing it to the boiler, condensate receiver, or discharge directly from the system. And this tank is employed in condensate return system. It may be either vertical or horizontal.
In flash/falling film evaporators, the liquid film falls by gravity in the vertical evaporation surface, while heat is transferred through the wall by condensing the steam. The mixture of liquid/vapor exits the bottom of the tube or plate and enters a vapor/liquid separator, from which concentrated liquid is pumped out and water vapors are directed to a condensing system. Falling film evaporators can be operated with very low temperature differences between the heating media and the boiling liquid, and they also have very short product contact times, typically just a few seconds per pass. These characteristics make the falling film evaporator particularly suitable for heat-sensitive products.