Energy conservation

Blowdown is a basic energy loss in steam boiler, because high temperature water is rejected, as to de-concentrate the dissolved solids.

Our attempt has to be to decrease BD, as to minimize energy loss.

According the material balance, the quantity of BD is:

                            X

(g)      BD = S * --------              

                        NC - X                

And this relationship can be modified to:                

                             1

(l) BD / S =  -------------------            

                        [NC / X] - 1

which represents the corresponding BD quantity as a function of NC and X.

The relationship of losses according to the material balance is:

                         X*(NC-1)

(j)        L = S * ----------------  

                         NC - X                       

Combining above equations we conclude::

(m)   BD/S = [L/S] / [NC - 1]

Which correlates BD/S and L/S, to NC, means correlates operational parameters to water analysis. This correlation is presented to the following graph.

[Back] [ Main ] [ Up ]