ABB Analytical – pH/ORP Limestone Scrubber pH Measurement Application Industry: Power Flue Gas Desulfurization pH measurement Wet limestone scrubbers are by far the most common technology for removing sulfur dioxide from coal fired, power station flue gas. As shown in the diagram, the flue gas from the furnace first passes through an electrostatic precipitator to remove fly ash. In the scrubber, the lime or limestone (calcium hydroxide or c

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