Control of the make-up cooking liquor, as well as initial and resulting alkali concentration, affects the uniformity of pulp produced. During the cooking process, residual alkali strength fluctuates with changes in chip composition, species, wood moisture, and the uniformity of concentration of the make-up chemicals.
Measurement of effective alkali concentration inside the digester has never been done before. The present methods require a filtered side stream which add delay and error. Savcor, together with Andritz has utilized its long experience in electrochemical measurements inside the digesters and developed an accurate in-situ alkali measurement.
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