催化裂化油浆固含量测定方法研究进展

Research Progress on Solid Content Determination Methods of Catalytic Cracking Slurry Oil

催化裂化油浆是催化裂化装置的副产品,油浆固含量的高低直接影响油浆的高附加值利用及催化裂化装置的安全平稳运行。因此,油浆固含量的准确快速测定对其综合利用及生产监测均具有重要作用。目前,油浆固含量的测定尚无统一的权威标准。介绍了油浆固含量的几种主要测定方法,包括传统离心法、新型离心法、灰分法、炭化灼烧法、传统过滤法、滤膜抽滤法、显微镜法等,并通过对比每种方法的优劣,分析其适用的范围,为油浆脱固效率的考察及炼油厂催化裂化装置的安全平稳运行监测提供支持。滤膜抽滤法能够全面地反映固含物的组成成分,不受油浆性质限制,准确度高,且用时较短,可应用范围非常广泛;更重要的是,滤膜抽滤法还适用于脱固后油浆固含量的测定,能够较为真实地反映出油浆的脱固效果。

Catalytic cracking slurry oil is a byproduct from catalytic cracking units,of which the solid content directly affects the high value-added utilization of slurry oil and the safe and stable operation of catalytic cracking unit.Therefore,to accurately and rapidly determine the solid content of slurry oil is of great significance for its comprehensive utilization and production monitoring.At present,there is no unified authoritative standards for the determination of solid content in slurry oil.Several main methods for determining the solid content of catalytic cracking slurry oil are introduced,including traditional centrifugation method,new centrifugation method,ash method,carbonization burning method,traditional filtration method,membrane vacuum filtration method,and microscopic method.The application scope of each method is analyzed by comparing its advantages and disadvantages,which can provide support for the investigation of desolidification efficiency of slurry oil and the safe and stable operation monitoring of refinery catalytic cracking unit.It is pointed out that the membrane vacuum filtration method can comprehensively reflect the composition of solids,and is not limited by the properties of slurry oil,which can be widely applied due to its high accuracy and time-saving.More importantly,the membrane vacuum filtration method is also suitable for the determination of solid content in slurry oil after desolidification,which can accurately reflect the desolidification effect of slurry oil.