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重油催化裂化装置是炼油工业中重要的二次加工过程,是重油轻质化的重要手段。催化装置加工的原料油中含硫、氮等杂质,这些腐蚀性物质在反应后大部分进入分馏塔顶油气和顶循系统造成设备腐蚀泄漏;产品质量下降;影响安全生产造成维修成本上升。本文对分馏塔塔顶油气及顶循环系统腐蚀状况进行阐述和分析,并且介绍了目前的防腐措施。
Heavy oil catalytic cracking unit is an important secondary processing in the oil refining industry and an important means of heavy oil light-weighting. Catalytic device processing of raw oil containing sulfur, nitrogen and other impurities, most of these corrosive substances in the reaction after the top fractionation tower into the top oil and gas and equipment caused by corrosion caused by leakage of equipment; product quality decline; affecting the safety of production caused by rising maintenance costs. This paper elaborates and analyzes the corrosion status of top oil and gas and overhead circulation system in fractionator, and introduces the current anti-corrosion measures.