Flue gas desulfurization system purifies exhaust gases emitted from thermal power plants, iron and steel plants, and others by removing sulfur dioxide (SO2). Types of flue gas desulfurization system include the wet and dry types; today, the wet type is often used. The SO2 concentration is measured at its inlet and outlet to monitor the performance. Such exhaust gases contain much moisture and the gas temperatures are low from the system, which raises concerns about moisture interference and corrosion for the SO2 monitoring.
HORIBA's stack gas monitoring system achieves more stable measurement than conventional systems due to the adoption of a unique cross-flow modulation technique and an interference correction type detector. We also contribute to solving customers' issue by pursuing better maintainability under difficult measurement conditions by proposing sampling systems according to exhaust gas conditions such as changing the probe material and adding an SO3 scrubber.