In this study, the emission of some hazardous pollutants including CO, CxHy, H2S, SO2, NOx and CO2 from six petrochemical incinerators (A to F) was studied in two different seasons, hot season (July 2015) and cold season (January 2016). The incinerators with various feeds and operating conditions are located in Petrochemical Special Economic Zone (PSEZ), south of Iran. Air pollutant dispersion model was implemented in this study to predict dispersion of each pollutant around the PSEZ. Measurement results showed that incinerators C and F had the lowest and the highest emission rate in hot and cold seasons, respectively. Also, according to the height of incinerator stacks, the incinerator F is the shortest incinerator that emits remarkable NOx with low flow rate which is an environmental issue. The air modeling indicated the influence of wind direction and also the effect of each incinerator on the concentration distribution of gasses. Almost all the pollutants specially CxHy were seen at high concentrations in the residential area around the PSEZ and affected the surrounding air quality. Since the wind direction in the whole year is mostly toward the north, east and south directions, most of the pollutants moved toward the residential areas.