加氢裂化装置加工高硫蜡油的情况分析

AN ANALYSIS OF A HYDROCRACKING UNIT PROCESSING HIGH SULFUR WAX OIL

分析了中国石化上海高桥分公司1.4 Mt/a加氢裂化装置加工高硫原料后生产运行中出现及可能出现的问题。从加工高硫原料对工艺、设备和产品质量的影响方面对装置运行现状进行分析,并提出相应的对策。加氢裂化装置经过适当改造即可加工硫质量分数不大于1.96%的原料,但应进一步优化原料,力求原料结构搭配合理,避免集中加工高硫、高酸原料,防止原料的硫含量急剧上升。应定期监测重点部位管道的均匀腐蚀减薄量及非均匀腐蚀(裂纹、应力腐蚀等)情况,尤其在日常生产中,应加强管线设备的测厚工作。在加氢裂化装置原料硫含量提高时,应跟踪尾油的硫含量,为适当提高裂化反应器后处理催化剂的反应温度提供根据。

In this paper, the operation status of the 1.4 Mt/a hydrocracking unit at SINOPEC Shang hai Gaoqiao Company is discussed including matters occurred and might happen. The effect of process- ing high sulfur feed on the process conditions, equipment corrosion and product quality is analyzed, so that, some suggestions for maintaining long-term production are put forward. It can be seen that with appropriate revamping, this unit could process feed having sulfur mass fraction below 1.96%, yet it should avoid processing high sulfur and high acid feeds heavily, optimization of feed constitution is ap- preciated. Monitoring the corrosion of pipeline and equipment should be carried on routinely. When pro- cessing high sulfur feed, the sulfur content of tail oil should be checked more often to provide reference data for increasing the temperature of post treating catalyst.