焦化蜡油两段提升管催化裂化研究

Study on conversion of coker gas oil by two-stage riser fluid catalytic cracking

关键词:  两段提升管催化裂化  焦化蜡油  催化裂化  产物分布

Key words:  two-stage riser fluid catalytic cracking  coker gas oil  catalytic crackingproduct distribution

摘要:

在两段提升管催化裂化实验装置上,以克拉玛依焦化蜡油为原料，考察了常规单段操作条件(反应温度、剂油比 和停留时间)对焦化螺油催化裂化转化性能的影响及相同转化率下焦化蜡油单段和两段反应产物分布的变化，同时， 还对比考察了焦化蜡油、减压错油单独进料和混合进料单段反应的差别。实验结果表明,与常规单段催化裂化技术相 比,两段提升管催化裂化技术在焦化蜡油催化裂化转化方面具有明显优势,相同转化率下，在大幅度提高轻油收率和液 收的同时,还会明显降低干气收率。此外，整体来看焦化错油、减压蜡油单独进料要明显优于混合进料。

Abstract:

In the two-stage riser fluid catalytic cracking (TSRFCC) experimental unit using Kelamayi coker gas oil (CGO) as feedstock, the effects of operation parameters, such as reaction temperature, catalyst-oil ratio and residence time, on the catalytic cracking conversion of CGO, and the change of product distribution between conventional FCC and TSRFCC under the same conversion were investigated. And the catalytic cracking reacts of CGO, VGO, and VGO blending with CGO were evaluated. The results show that compared with conventional FCC, under the same conversion, the yield of light oil and liquid yield could be increased significantly，and the yield of dry gas could be reduced using TSRFCC technology, which exhibited excellent advantages in the catalytic cracking of CGO. Furthermore, on the whole the catalytic cracking of CGO and VGO separately was superior to that of VGO blending with CGO,