Measurement and modeling of pollutants in cement plant using Screen View model: case study, Zaveh cement factory

In the present study, first CO, CO2, NOx, HC, H2S, and dust were measured in different parts of Zaveh cement plant and then modeling of pollutants in different stability conditions up to 50 km of the plant in the Screen View software was investigated. The highest concentration of dust in the preheater outlet was 93 mg/m3 (less than the Iranian emission standard). The results of the Screen View model to simulate the emission of preheater gas pollutants indicate that the maximum concentration of NOx pollutant in the unstable state is 58.6 μg/m3 up to a distance of 3.5 km from the source. The maximum output concentration of the preheater (12.7 μg/m3) in unstable weather conditions is less than the standard clean air standard and finally covers a range of 3 to 30 km. Dust from cement silo and mills stack due to the presence of a preheater structure as a barrier and the creation of a downwash zone downstream of these two stack, caused dust pollution around the distance of 200, 220, and 350 meters.