中美油罐VOCs排放核算公式参数敏感性研究

Study on the sensitivity of parameters of VOCs emission accounting formula for oil tank in China and America

介绍了中石化系统VOCs排放核算公式和美国环保署推荐公式,并对2种方法的优缺点进行了对比分析.结合油罐排放核算实例,分析了导致中美两种方法计算结果不同的原因,最终确定了VOCs年排放量核算结果为43.43t.利用了回归分析的方法,对中美核算公式的主要参数进行了敏感性研究,各参数拟合方程的R^2均接近于1,将t统计量P值显著性水平设置为0.05,结果表明,在计算浮顶罐VOCs排放时,中石化公式的敏感参数包括:粘附系数、风速、二次密封系数、密封系数和风速指数;EPA公式的敏感参数为内壁粘附系数、风速、静风边缘密封排放系数、有风情况下边缘密封排放系数和浮顶板密封长度系数,风速指数为非敏感参数.

Sinopec VOCs emission accounting formula and the EPA recommended formula were introduced,and the merits and faults of two methods were compared and analyzed.By the case study of tank emission accounting,the reasons that lead to the different results of the two kinds of method were analyzed,and the result of VOCs emission was determined as 43.43t/a.The method of regression analysis was utilized,and the sensitivity of the main parameters of the Sino-US accounting formula is studied,the R2 of each parameter fitting equation is close to 1,based on t test p value at a significance level of 0.05,and the following conclusions were obtained:in the calculation of floating roof tank VOCs emission,the sensitive parameters of Sinopec formula include adhesion coefficient,wind speed,secondary seal coefficient,seal coefficient and wind speed index;and the sensitive parameters of EPA formula were inner surface adhesion coefficient,wind speed,no edge sealing discharge coefficient,wind edge sealing emission coefficient and the floating roof sealing length coefficient,while the wind speed index was non-sensitive parameter.