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The new generation of on-line wet end analyzers Papermakers have long recognized how important the charge of fibers and additives is for understanding and controlling the interactions of wet end chemistry. Towards this end, Mütek continues to advance the instrumentation technology and application knowledge for measuring and controlling the charge characteristics of wet end fiber suspensions. Mütek now introduces the Particle Charge Titrator PCT 20 - the first instrument of a new generation of on-line analyzers for enhanced wet end control. The PCT 20, a state-of-the-art on-line charge analyzer, is the result of 12 years experience in charge measurement and control. It features independent, active module technology as well as outstanding signal processing, a newly designed measuring cell with proven cleaning technology. Mütek’s new instrument thus increases measurement repeatability, reduces maintenance considerably, provides a new graphical user interface, and offers optional features for measuring pH, conductivity and turbidity in filtrate. On top of that, the new analyzer now samples from up to four process positions throughout the wet end – from either the thick stock or the thin stock, using the Thick Stock Sampler TSS – or directly from white water, without a TSS. These sampling capabilities are unique to the Mütek charge measurement concept for providing accurate and repeatable filtrate extraction from all process positions. The PCT 20 provides a new tool for controlling charge in the wet end. Commonly, it is used for controlling the incoming furnish charge level with a fixing agent so that other downstream additives are applied more efficiently and economically. In certain cases, charge measurement alone does not provide overall information about the process. Modules for turbidity in filtrate, pH and conductivity measurement fill this gap and provide additional information necessary for coagulant control and process monitoring. These control strategies provide substantial cost savings to the mill. Costly functional additive consumption is reduced while still achieving desired paper qualities. Other chemical control loops, such as retention aid addition for white water consistency control, are stabilized. PI |
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