Evaluation of Sulfur Oxide Emissions at Integrated Steel Mill in using Optical Remote Sensing (SkyDOAS)

Abstract

Solar Occultation Flux (SOF) is based on the Solar Infrared (IR) spectrum. The equipment measures vertically integrated concentrations along the wind and crosswinds of pollutants and provides total emissions. Flux is calculated as an estimate of contaminants excluding inflow from the windward side. In addition to SOF systems, UV/visible systems (SkyDOAS) are used for SO2 measurements. SkyDOAS measures scattered light in the zenith and does not utilize direct solar light in contrast to the SOF instrument. In this study, the total amount of sulfur oxide (SO2) emissions from the integrated steel mill located in Chungcheongnam-do was measured six times from December 20 to September 21 and compared with the emission data presented by the workplace. The average emission at a workplace was 322 kg/hr, and the equipment measurement results showed that the emission was twice as high as 638 kg/hr on average. For more accurate measurement, LIDAR will be used to improve the accuracy of wind direction and wind speed, and if only pollutants emitted from the workplace are measured and compared by minimizing emission interference from the outside, it will be possible to effectively manage the workplace.