Patent ID: 7241363

Claim:
A method for decreasing scaling in a digester having an upright generally cylindrical vessel having a top end and a bottom end, the method comprising the steps of: a. extracting a first quantity of cooking liquor having a first concentration of dissolved calcium therein from a first location intermediate said top and bottom ends of the digester without circulating the first quantity of cooking liquor of dissolved calcium back into the digester, b. extracting a second quantity of cooking liquor having a second concentration of dissolved calcium therein from the digester at a second location spaced apart from said first location and downstream therefrom, said second concentration of dissolved calcium being less than said first concentration of dissolved calcium; and c. reintroducing at least a portion of said second quantity of cooking liquor to the digester at a third location at, about or below the first location to replace a portion of the first quantity of cooking liquor.