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Cost Effective and Accurate pH Measurement in Limestone-Gypsum Flue Gas Desulfurization Systems

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Cost Effective and Accurate pH Measurement in Limestone-Gypsum Flue Gas Desulfurization Systems

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In limestone-gypsum flue gas desulfurization systems, the consumption of a desulfurization agent (lime) is controlled using online pH analyzers. Of great concern in the pH measurement is heavy lime scaling on the pH electrode. To ensure accurate measurements, frequent cleaning of the electrodes with acid is required, adding to both maintenance workload and cost.

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