炼油企业常减压蒸馏系统碳素流动分析及CO_2减排

Study on carbon flow analysis and CO_2 emission research of the atmospheric and vacuum distillation system in the oil refinery enterprise

炼油企业常减压蒸馏系统不仅是重要的石油加工环节,也是CO_2排放的主要工序之一。基于元素流分析方法,分析了炼油企业"三塔两炉"的常减压蒸馏系统的碳素流动过程,以某炼油企业生产数据为例,分析了影响该系统CO_2排放的主要影响因素,并运用数学规划方法分析了燃料消耗量、过量空气系数、燃料碳氢比和燃烧效率4个因素对常压蒸馏子系统和减压蒸馏子系统的CO_2排放影响。结果表明:常压蒸馏子系统是常减压蒸馏系统中主要的CO_2排放子系统,约占系统总CO_2排放量的62.84%;燃料消耗量和燃料碳氢比是影响常减压蒸馏系统碳排放的主要因素,常压炉和减压炉的碳排放量随着加热炉燃料消耗量的增加和输入燃料碳氢比的增大而增大。

The atmospheric and vacuum distillation system（AVDS）is one of the most import processes and the main CO_2 emissions part in the oil refinery enterprise. Carbon flow model was established based on substance flow analysis（SFA）. The main influence factors affecting the CO_2 emissions were analyzed based on the production data. Four factors, including fuel consumption, excess air coefficient,the C/H ratio of fuel and combustion efficiency,were discussed. The results showed that the main subsystem of CO_2 emissions was the atmospheric distillation subsystem（ADS）and the CO_2 emissions accounted for about 62.84% of AVDS. The main factors influencing the CO_2 emissions were the consumption and C/H ratio of fuel for AVDS. The CO_2 emissions increased with increasing consumption and C/H ratio of fuel for both atmospheric furnace and vacuum furnaces.