油页岩热解煤气粗苯精制的分离序列研究

SIMULATION AND ANALYSIS OF SEPARATION SEQUENCES FOR CRUDE BENZENE FROM OIL SHALE RAW COKE OVEN GAS

为提高从油页岩热解煤气中回收的粗苯产品的经济效益,研究了对回收的粗苯进行精制的分离序列,模拟常规精馏序列和热耦合精馏序列分离粗苯的过程并计算其能耗和热力学效率.结果表明,在轻组分含量较高的粗苯精制分离序列中,完全热耦合精馏序列仍然具有较好的节能效果.其能耗比常规精馏序列中能耗最小的直接分离序列节能约35%,热力学效应也由7.4%提高到11.6%.

To enhance the economic effectiveness of the crude benzene recovered from oil shale raw coke oven gas,this paper study the separation sequences for the crude benzene,simulate the process of conventional sequences and thermally coupled distillation sequences and calculate energy consumption and thermally efficiency of these separation sequences.The result shows that thermally coupled distillation sequences is the most effective energy-saving separation sequence to separate the crude benzene mixture in which light component is the major fraction.Compared with the direct sequence of conventional distillation,the result of energy consumption analysis indicates that thermally coupled distillation sequence could save energy up to 35% and its thermodynamic efficiency is enhanced from 7.4% to 11.6%.