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pH Measurement in Flue Gas Desulfurization Systems That Use Magnesium Hydroxide Slurry

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pH Measurement in Flue Gas Desulfurization Systems That Use Magnesium Hydroxide Slurry

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In flue gas desulfurization systems that use magnesium hydroxide (Mg(OH)2) slurry, the consumption of the desulfurization agent (Mg(OH)2) is controlled by using online pH analyzers. A great concern in the pH measurement is heavy staining of the pH electrodes by the Mg(OH)2 slurry. To ensure accurate measurement, frequent cleaning of the electrodes with an acid is required, adding to both maintenance workload and cost.

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