Abstract: The sulfur recovery unit of PetroChina Sichuan Petrochemical Co., Ltd. adopts hydrogenation reduction absorption process and dedicated hydrogenation catalyst for tail gas treatment. A comparison was made between the low temperature hydrogenation catalyst CT6-13 and the conventional hydrogenation catalyst CT6-5B in terms of physical properties, loading methods, presulfuration, and technical performance. An in-depth comparison and analysis of the application of CT6-5B and CT6-13 in the tail gas hydrogenation reactor showed that the use of CT6-13 catalyst has significant energy-saving and consumption-reducing effects. The tail gas emission meets the design requirements of total sulfur not exceeding 50 μL/L and SO2 emission concentration not exceeding 100 mg/m³. With the support of efficient desulfurizer CT8-26 and flue gas washing technology, it is possible to achieve standard emission during the start-up process and ultra-low emission of SO2 during daily operation (less than 5 mg/m³). While saving energy and reducing consumption, it also solves the green production during start-up and abnormal conditions and the bottleneck problem of long-term operation of the tail gas incinerator in the sulfur recovery unit.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">sulfur recovery tail gas, CT6-13, low temperature hydrogenation catalyst, loading method, presulfuration, reactor bed temperature, sulfur dioxide, ultra-low emission

摘要： 中国石油四川石化有限责任公司硫磺回收装置采用加氢还原吸收工艺及专用加氢催化剂进行尾气处理。将低温加氢催化剂CT6-13与常规加氢催化剂CT6-5B从物性、填充方法及预硫化、技术性能等方面进行了对比。深入对比分析CT6-5B和CT6-13在尾气加氢反应器的应用情况，发现采用CT6-13催化剂，节能降耗效果明显，尾气排放满足总硫不大于50 μL/L、SO2排放浓度不大于100 mg/m³的设计要求。配套高效脱硫剂CT8-26及烟气洗涤技术，可实现开工过程尾气达标排放及日常运行过程尾气SO2排放浓度不大于5 mg/m³的超低排放。在节能降耗的同时解决了开停工及异常工况下的绿色生产及制约硫磺回收装置尾气燃烧炉长周期运行瓶颈问题。

关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">硫磺回收尾气, CT6-13, 低温加氢催化剂, 填充方法, 预硫化, 反应器床层温度, 二氧化硫, 超低排放