What is Boiler Water Carry-over?
Boiler water carry-over is the contamination of the steam with boiler-water solids. There are four common types of boiler-water carry-over. In one bubbles or froth actually build up on the surface of the boiler-water and pass out with the steam. This is called foaming and can be compared to the stable foam found on beer. In the second type small droplets of water in the form of spray or mist are thrown up into the steam space by the bursting of the rising steam bubbles at the steam release sur-face. This is sometimes called 疎quaglobejection・and is like ginger ale or champagne where no stable foam is formed but drop-lets of liquid are ejected from the liquid surface. The third condition of carry-over, called priming, is a sudden surge of boiler-water that carries over with the steam, similar to the effects produced in uncapping a bottle of charged water. stem contamination may also occur from leakage of water through im-properly designed or installed steam separating equipment in a boil
