CT6系列催化剂在硫磺回收装置的长周期工业应用

Long period industrial application of CT6 series catalysts in sulfur recovery unit

关键词:  硫磺回收  催化剂  长周期  达标排放

Key words:  sulfur recovery  catalyst  long period  standard emission

摘要:

介绍了CT6-4B抗漏氧保护催化剂、CT6-8钛基硫磺回收催化剂、CT6-2B硫磺回收催化剂和CT6-5B尾气加氢水解催化剂在中国石油四川石化有限责任公司两套5×10⁴ t/a硫磺回收装置的长周期工业应用情况。自开工以来的6年运行时间中,在单套硫磺回收装置高负荷运行、高温掺和阀多次故障、开停工期间反应器飞温、比值分析仪频繁故障等异常工况下,催化剂均能正常使用,硫磺回收装置运行正常,Claus段回收率在96.5%以上,有机硫水解率在99%以上,总硫回收率在99.96%以上,保证了尾气排放值远低于GB 31570-2015《石油炼制工业污染物排放标准》的规定,可为同类装置的催化剂选型和装置改造提供参考。 

Abstract:

This paper introduced the long period industrial application of CT6-4B anti-oxygen leakage protection catalyst, CT6-8 titanium base sulfur recovery catalyst, CT6-2B sulfur recovery catalyst and CT6-5B tail gas hydrogenation catalyst in the 2 sets of 50 000 ton per year sulfur recovery unit of China Petroleum Sichuan Petrochemical Company Limited. During the 6 years operation time since initial operation, under the abnormal conditions of single set of high load operation of sulfur, failures of high-temperature mixing valve, runaway of the reactor during start-up and shutdown, frequent failure of ratio analyzer, the catalysts met the requirements and all parameters of the device were normal. The sulfur recovery rate of Claus was above 96.5%, the organic sulfur hydrolysis rate was above 99%, and the total sulfur recovery rate was above 99.96%, which ensured that the tail gas emission value was far lower than the requirement of GB 31570-2015 Emission Standard of Pollutants for Petroleum Refining Industry. It can provide a reference for the catalysts selection and plant modification of similar devices.