再生烟气氧含量对硫转移助剂使用效果的影响

在中型催化裂化装置上考察了不同硫含量的催化裂化原料的再生烟气氧含量对硫转移助剂使用效果的影响。结果表明,对于高硫原料,产物硫分布受再生烟气氧含量的影响更大些;随着再生烟气氧含量的增加,再生烟气的SO_2含量明显降低,烟气中的硫化物经反应主要转移到反应系统的气相之中,污水中的硫化物质量分数略有增加,而油品中的硫化物质量分数略有降低。在使用硫转移助剂时,工业装置可通过适度调整再生烟气氧含量的变化来有效调节再生烟气SO_2的排放,减少环境污染。

INFLUENCE OF OXYGEN CONTENT IN REGENERATOR FLUE GAS ON THE PERFORMANCE OF SULFUR TRANSFER AGENTS

The influence of oxygen content in the flue gas of regenerator on the performance of sulfur transfer agents was investigated on a pilot-scale FCC unit by using feedstocks having various sulfur contents. The experimental results indicated that the oxygen content of regenerator flue gas had a significant effect on the sulfur distributions of FCC products when using sulfur transfer agents, especially for high sulfur feedstocks. With the increase of oxygen content in regenerator flue gas, the SO2 content in flue gas decreased significantly, the sulfur containing compounds in flue gas were transferred to the gas phase of the reaction system mainly, the sulfur content in sewage increased and the sulfur content of light oils decreased slightly. When using sulfur transfer agents, by adjusting the oxygen content in the regenerator flue gas could effectively control the discharge of SO2 and thus reduce the environmental pollution.