石化企业装置VOCs无组织排放测算技术研究OA

To address the challenge of accurately quantifying volatile organic compounds(VOCs)fugitive emissions from typical process units in petrochemical enterprises,a calculation method was developed based on a mass flux model.Initially,a monitoring plane perpendicular to the prevailing wind direction was constructed downwind of the target unit to acquire multi-point monitoring data reflecting pollutant dispersion characteristics.By employing a two-dimensional Gaussian function,the area-averaged concentration of the dispersion plume across the monitoring plane was calculated and subsequently integrated with real-time meteorological data to es-tablish the emission quantification approach.Furthermore,to verify the accuracy of the proposed method,pen-tane gas release simulation experiments were conducted at a testing facility in northern China,utilizing typical petrochemical emission configurations-specifically point,surface,and bulk sources-as target release sources.Experimental results demonstrated that under conditions where the prevailing wind direction was approximately perpendicular to the monitoring plane,the average wind speed exceeded 1 m/s,and the monitoring plane suffi-ciently covered the dispersion plume,the average quantitative errors of the calculation method for the point,are-a,and volume source leakage scenarios were 6.50%,16.94%,and 13.69%,respectively.