Novel Kappa Measurement Technologies

Mathur Akhlesh, Hasegawa Masashi

doi:10.2524/jtappij.70.247

Pulp being an intermediate and commodity is always under pressure to contain costs, meet quality specifications and has the right environmental profile, irrespective of where a mill is on the cyclic profitability curve. Having sharper and smart eyes to the process not only allows pulp makers to optimize the unit operations but these sensors are providing continuous visibility to mill management and proven tools to tighten controls and take quick preventive actions before it is too late.<br>The whole Kraft fiberline process from cooking through to bleaching is designed to selectively remove lignin from wood chips to produce pulp that meets brightness and strength requirements and is produced in most cost efficient way. Traditionally, fiberline has been monitored & controlled using fiber kappa alone. Missing information on dissolved lignin has been one of the root causes of lack of implementation of fully automated process controls.<br>This paper focuses on new sensor technologies available today that measure lignin in various forms including dissolved lignin. Deployment of these sensors at key locations in fiberlines has demonstrated huge savings to mills in yield and chemical consumptions. These innovative measurement technologies have enabled optimum process control strategies for mills to operate and change gears quickly to remain on the sweet spot of optimum cost and productivity curves and that too with attractive payback. These smarter novel sensors are quickly gaining popularity among pulp makers as breath of fresh air and a differentiated approach to operate pulp mills today.

Novel Kappa Measurement Technologies

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