摘要
金陵石化1.50Mt/a加氢裂化装置采用单段串联部分循环加氢工艺,以直馏蜡油和焦化蜡油的混合油为原料,产品方案是最大量生产优质中间馏分油。该装置2014年11月停工更换催化剂,精制段采用FF-26精制剂,而裂化段首次应用FC-16B级配FC-14组合裂化剂。在装置满负荷运行期间,精制反应器入口温度不断提高,而温升却在下降,重石脑油和尾油的硫、氮含量逐渐增高,说明精制剂活性下降,而随着裂化温度的提升,产品液体收率逐渐增加,中间馏分油整体收率未有明显变化,但航煤和柴油的液体收率比却不断下降,说明裂化剂的活性和选择性降低。变压器油的倾点逐渐升高,证明级配裂化剂的异构性能逐渐降低。在一定范围内,通过提高精制和裂化反应温度,虽能补偿精制催化剂活性的衰减,但级配催化剂的裂解和异构化能力却不能恢复,导致目标产品收率降低、能耗增加,装置盈利能力下降。针对延缓FC-16B级配FC-14催化剂失活、提高装置运行时间等问题,提出建议。
The 1.5Mt/a hydrocracking unit at SINOPEC Jinling Company adopts single-stage partial-cycling hydrocracking process ,which uses the mixture of straight run gas oil and coker gas oil as the feed to maximize the production of middle distillate.In November 2014,the unit was shut down for catalyst replacement. The refining section used FF-26,and the cracking section used FC-16B grading FC-14 combination catalyst for the first time.During the full-load operation of the unit,the inlet temperature of refining reactor gradually increased,while the temperature rise kept falling.The sulfur and nitrogen content of heavy naphtha and tail oil increased gradually,indicating that the activity of refining catalyst was declining.However,with the increase of cracking temperature ,the yield of liquid product increased gradually ,the overall yield of middle distillates showed no significant change,but the yield proportion of jet fuel to diesel oil was declining,showing that the activity and selectivity of cracking catalyst was decreased The pour point of transformer oil gradually increased ,proving that the isomerization performance of the grading cracking catalyst gradually decreased.Within a certain range ,the activity decay of refining catalyst can be compensated by increasing the temperature of refining and cracking reactions,but the cracking and isomerization performance of grading catalyst cannot restored.As a result,the yield of desired product was lowered,the energy consumption was increased and the profitability of unit was decreased.Some suggestions are put forward for slowing down the deactivation of FC- 16B grading FC-14 catalyst and prolonging the operation cycle of the unit
出处
《中外能源》
CAS
2017年第4期68-74,共7页
Sino-Global Energy
关键词
加氢裂化
级配催化剂
中间馏分油
选择性
活性
hydrocracking
catalyst grading
middle distillate
selectivity
activity
作者简介
姜维，硕士，助理工程师，2014年毕业于浙江工业大学工业催化专业．主要从事加氢裂化装置生产操作。E-mail：83863584@qq．com
