摘要
利用实沸点蒸馏装置将长庆重油催化裂化原料切割成不同性质的窄馏分,并利用小型固定流化床反应装置对其进行催化裂化反应性能考察,发现在VR(>500℃)中含有约20%的优质反应原料。进一步考察了在不同分级点下(500、540℃)对原料进行分区反应,并与常规混合进料进行比较,发现在相同的掺渣率下,分区进料均可以提高轻质油收率,降低焦炭+干气产率。通过提高分级切割点到540℃,分区进料可以进一步优化产物分布,且随着掺渣率的增加,趋势更加明显。
Changqing heavy oil was cut into different fractions by true boiling point distillation(TBP distillation),and the catalytic cracking reaction performance of different narrow fractions was investigated in fixed fluidized bed reactor.The results showed that VR(>500℃) contain about 20% of high-quality fraction.The distribution of products of separated feeding in different fraction cut point was also investigated,and compared with mixed feeding.The comparison result demonstrates that separated feeding can enhance the yield of light oil,and reduce the yield of coke+dry gas under different fraction cut point.By improving the fraction cut point to 540℃,the product distribution of separated feeding can be further optimized than 500℃,and with increasing of the residue blending ratio,the trend is more evident.
出处
《现代化工》
CAS
CSCD
北大核心
2010年第S2期274-277,279,共5页
Modern Chemical Industry
关键词
分区进料
混合进料
分级点
催化裂化
separated feeding
mixed feeding
fractionation cut point
catalytic cracking
