金陵连续重整装置长周期运转的问题及对策

中国石油化工股份有限公司金陵分公司连续重整装置采用UOP超低压专利技术,设计规模1.0 M t/a。装置运行过程中发现因循环水质量差和流量小导致增压机冷却效果差;因重整产氢纯度低导致其中C2以上烃类在氢还原气氛下发生氢解反应;电阻丝局部积炭,热量传递效果变差;氧化镁绝缘层过热变薄失去绝缘效果,致使还原电加热器接地故障跳停;因抽提塔界面波动过大、溶剂脏、消泡剂泵故障、汽提塔负荷增大引起汽提塔冲塔等问题。提出了优化循环水流程、改造抽空器、引用PSA高纯度氢作为还原氢、降低抽提溶剂比、改变异构化轻烃流程等一系列措施,基本解决了制约装置长周期运行的问题。同时也指出了制约装置大负荷生产存在的＂瓶颈＂。

Problems affecting long-term operation of a continuous catalytic reformer and countermeasures

The 1.0 MM TPY continuous catalytic reformer in SINOPEC Jinling Company was designed with UOP's ultra-low pressure CCR process license.In the operation of the unit,the following problems have been found: cooling effect was poor due to the poor cooling water quality and small flowrate;Grounding system of reduction electric heater tripped because of lost insulation of overheated magnesium oxide insulation layer resulted from carbon deposition on resistance wire which reduced heat transfer when hydrogenolysis ...