因悬浮床加氢裂化反应器中存在着分别以加氢反应和裂化反应为主要反应的两个分段 ,即加氢段和裂化段 ,所以提出了两段悬浮床加氢裂化的概念。让原料在同一个反应器中进行两个反应 ,适当提高加氢段的温度 ,降低裂化段的温度 ;或者让原料在较小的高温反应器中实现加氢 ,在较大的反应器中实现裂化。在裂化段前可注入适当的抑焦剂。探讨了两段悬浮床加氢裂化提高渣油的转化率 ,降低甲苯不溶物产率的原理 The concept of hydrocracking in two-stage suspension bed is proposed because there are two sections in the hydrocracking reactor of hydrocracking reactor, which are the main reaction of hydrogenation reaction and cracking reaction, namely hydrogenation section and cracking section. Let the raw materials in the same reactor two reactions, the appropriate increase in hydrogenation temperature, reduce the temperature of the cracking section; Or the raw material in a smaller high-temperature reactor to achieve hydrogenation in a larger reactor to achieve Cracking. In the cracking section before injection of appropriate coke inhibitor. The principle of hydrocracking in two-stage suspension bed to improve the conversion rate of residual oil and reduce the yield of toluene insolubles was discussed