석탄 저장시설의 석탄비산먼지와 총 휘발성유기화합물의 분포 특성

Abstract

Coal dust scattering by the wind in the areas around outdoor coal storage facilities of steel mills and coal-fired power plants has been reported. We tried to address this issue by the indoorization of the outdoor coal yard, which will reduce the coal dust scattering. Thus, this study investigated the distribution characteristics of scattering coal dust and total volatile organic compounds, and recommended measures to improve the internal environment. The average concentration of coal dust above the ground by upper dust scattering was measured to be roughly twice as high as that closer to the ground. The highest concentration of dust particles was between 33 and 50 m above ground near the central deck. In addition, the dust concentration was always low in the north entrance area because of external ventilation provided by open door. However, the dust concentration was high in the southwest area, which lacked an entrance door and was further obstructed by mountain terrain. The concentration of total volatile organic compounds was estimated to be higher in the lower part of the coal storage than in the other areas, although there was no significant difference because it was typically extreme low concentration. Therefore, to improve the internal environment, the installation of an air purifier is recommended at the height of central deck in the southwest area of the indoor coal storage.