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

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D H T M P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...

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

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 2.16×10⁹ 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.