Abstract

CLA 2000 Cooking Liquor Analyzer gives on-line information on cooking reactions during a cook. Alkali, total dissolved solids and lignin contents are measured during individual cooks in a batch digester house and from several circulations in a continuous digester. Mill trials show good correlations between CLA 2000 measurements and laboratory analyses. Using these measurements it is possible to predict kappa number values before the end of the cook in a batch digester or to alter cooking conditions in a continuous digester to obtain desired kappa number. In addition to kappa number prediction CLA 2000 can be utilised in alkali dosage and residual alkali control.