重整装置预加氢进料/产物换热器内漏分析与判断

Analysis and diagnosis for leaks in pre-hydrotreating feed/effluent heat exchanger of catalytic reformer

介绍了一种通过比较预加氢反应器进料与生成油换热器、汽提塔进料与塔底油换热器、汽提塔进料与分馏塔塔底油换热器以及预加氢进料与分馏塔顶油换热器油样中总硫含量的变化来分析与判断预加氢进料换热器内漏的方法。正常生产情况下,预加氢精制油中总硫的含量应该是比较低的。如果精制油中总硫质量分数超过0.5%,则或是催化剂活性下降,或是相关换热器发生内漏。利用这一特点,可进行预加氢进料/产物换热器内漏的分析与判断。此方法在中国石化青岛炼化预加氢装置上的运用情况表明,结果准确、简便,行之有效。

A method is presented for the analysis and diagnosis of the pre-hydrotreating feed/product heat exchanger leak through the analysis of the changes of sulfur content in pre-hydrotreating feed/product heat ex- changer, stripping tower feed/bottom oil heat exchanger, stripping tower feed/bottom oil of fractionating tower heat exchanger, pre-hydrotreating feed/overhead oil of fractionating tower heat exchanger. In normal operating conditions, the total sulfur in pre-hydrotreated oil is lower. If sulfur in pre-hydrotreated oil exceeds 0.5 m%, it indicates that either the catalyst activity has fallen down or the leakage has occurred in the heat exchangers. The commercial application of this method in the pre-hydrotreating unit of Qingdao Refining ＆ Chemical Co. , Ltd proves that it is an effective and dependable and easy means for diagnosing heat exchanger leaks.