催化裂化柴油深度加氢装置改造后的运行问题分析及解决措施

中国石化石家庄炼化分公司2号汽柴油加氢装置于2017年进行质量升级改造,采用中国石化石油化工科学研究院的SSHT技术,新增1台加氢反应器。装置加工以催化裂化柴油和焦化汽油为主的汽柴油原料,经深度加氢脱硫后生产硫质量分数小于10g/μg的柴油和石脑油。装置改造后出现一些运行问题,主要包括反应系统温升偏高、冷油中断、反应器径向温差偏大、高压分离器液位波动、柴油产品色度不合格等。通过对以上问题进行原因分析,提出了近期和远期的解决措施,保证了装置生产稳定和产品质量合格,为同类装置的设计和操作提供了经验数据。

PROBLEMS AND MEASURES OF DEEP HYDROTREATING OPERATION OF FCC DIESEL AFTER UNIT REVAMPING

The 2# gasoline and diesel hydrotreating unit in SINOPEC Shijiazhuang Refining & Chemical Company was revamped and upgraded by using the SSHT technology developed by SINOPEC Research Institute of Petroleum Processing. The upgraded unit with a new added hydrotreating reactor used FCC diesel and coker naphtha as feedstocks to produce diesel and gasoline with mass fraction of sulfur of less than 10 μg/g through deep hydrodesulfurization. However some problems occurred during the operation, including the temperature rise of the reaction system on the right side, interruption of the cold oil, large radial temperature difference of the reactor, fluctuation of the liquid level of the high-pressure separator, and the unqualified color of the diesel product. To solve these problems, the short-term and long-term solutions were proposed to ensure the stable production and quality of the products.