沿江炼油厂渣油加氢装置长周期运行及优化对策

OPTIMIZING MEASURES FOR LONG TERM OPERATION OF VRDS UNITS IN REFINERIES ALONG THE YANGTZE RIVER

针对沿江炼油厂渣油加氢装置原料硫含量低、氮含量较高、金属Ni?V比高以及金属Fe和Ca含量高等特点,中国石化石油化工科学研究院提出了一系列解决方案:增设原油预脱钙措施,开发容垢能力更高的保护剂和残炭前身物加氢转化能力更强的催化剂,开发有针对性的催化剂级配技术,开发高效的反应物流分配技术,在部分炼油厂实施RICP工艺。工业应用结果表明,所开发的集成技术可充分发挥保护反应器的容垢能力和整体催化剂的活性,有利于沿江炼油厂渣油加氢装置的长周期运转。

The feeds of VRDS units in refineries along the Yangtze River are characterized by high nitrogen,low sulfur,high Ni/V ratio and large Fe,Ca content. A series of solutions were developed by the Research Institute of Petroleum Processing,SINOPEC and commercialized successfully. A crude decalcification facility was added and a guard catalyst with higher capability for FeS and CaS deposition was developed to solve the problem of high Fe, Ca content. Meanwhile a catalyst with higher HDCCR conversion for the low sulfur and high nitrogen content feed was applied. For realizing a longer cycle- length, a suitable catalyst grading technology,a high efficient flow distribution technology and the RICP process in some refineries were practiced. The results show that coke-make decreases dramatically, which is beneficial to the longer cycle-length. Key