Blow-off and Concentration if Boiler Water

Abstract

The feed water treatment before it is fed to boilers is mostly practised. rencently, but for small or middle type boilers the treatment to soften the boiler water is more used. In both cases, it is necessary to saoften the boiler water by blowing-off. The concentration of boiler water is a problem of boiler in its handling. Here, the boiler handling may be exressed in terms of a sequence of 3 steps considered chiefly on blowing-off of boiler water, and the concentration ratio of boiler water and feed water is solved. Next, by the representation of the continuous process of water feeding, steam generation and blowing-off of boiler water, the concentration ratio of boiler and feed water are obtained. The continuous process assumed shows nearly the actual boiler operation on the concentration ratio from the relations above. So the nomographs and charts of this expression will be made to be used by the boiler engineers. In the present paper the differences of the above expressions are discussed and numerical expamples are given.