两段提升管催化裂解-催化裂化柴油深度加氢回炼耦合工艺的过程集成与参数优化

PROCESS INTEGRATION AND PARAMETERS OPTIMIZATION OF HEAVY OIL TWO-STAGE RISER CATALYTIC CRACKING COUPLED WITH DEEP HYDROGENATION OF LIGHT CYCLE OIL

加强环烷基重油深加工具有极其重要的工业和经济意义。以环烷基秦皇岛原油减压蜡油馏分(350~500℃)为原料,提出了两段提升管催化裂解与催化裂化柴油(LCO)深度加氢处理耦合的DHTMP新工艺。基于中试试验数据,对以生产低碳烯烃和轻质芳烃为目的产物的DHTMP工艺进行了模拟和优化,得到了优化的操作参数。采用优化的操作参数,即一段和二段提升管反应器出口温度分别为520℃和540℃,DHTMP工艺得到汽油和液化气产率之和超过83%。此外,DHTMP工艺的经济性良好,对于加工能力2.0 Mt/a装置,其财务净现值为2.16×10^(9)元,内部收益率为21.57%。碳排放分析结果表明,创造每百万元生产总值,DHTMP工艺排放二氧化碳70.08 t。

Enhancing the deep processing of naphthenic-base heavy oil has extremely important industrial and economic significance.Based on the Qinhuangdao naphthenic-base heavy oil,a novel heavy oil to petrochemicals process integrated with light cycle oil(LCO)deep hydrotreating and two-stage-riser for maximizing propylene(DHTMP)is carried out,simulated,and optimized.Based on the pilot test data,the DHTMP process for the production of low-carbon olefins and BTX was simulated and optimized,and the optimized operating parameters were obtained.Using the optimized operating parameters,i.e.the outlet temperatures of the first and second riser reactors are 520℃and 540℃respectively,and the total yield of gasoline and LPG obtained by DHTMP process exceeds 83%.Furthermore,the DHTMP process exhibits favorable performances from the economic level.The DHTMP process has better net present value of 2.16×10^(9) CNY,and internal rate of return of 21.56%for a unit with capacity of 2.0 Mt/a.The results of carbon emission analysis show that the DHTMP process emits 78.08 tons of carbon dioxide per million yuan of total output value.