通过操作条件的优化和调整,降低常压中段回流量,提高塔顶回流量,改变常四线馏出口位置,提高汽提蒸汽量,以改善分馏效果,使常压塔柴油收率提高;降低常四线量,提高减顶温度,降低减一线量,以提高减顶柴油收率,使减一线由馏出蜡油改为馏出柴油。减压各侧线产品方案也发生较大变化。 Through the optimization and adjustment of operating conditions, the mid-atmospheric reflux can be reduced, the reflux at the top of the column can be increased, the outlet position of the normal four-wire distillation can be changed, the amount of steam stripped can be increased, the fractionation efficiency can be improved, the yield of diesel oil can be increased, Often four lines, increase the reduction in temperature, reduce the amount of a minus line, in order to increase the yield of diesel, reducing the first line from distillate to distillate diesel. Decompression of the product sidelines have also undergone major changes.