络合铁脱硫(CTS)工艺运行问题分析及改进措施

ANALYSIS OF PROBLEM IN OPERATION OF COMPLEX IRON DESULFURIZATION(CTS)PROCESS AND IMPROVEMENT MEASURES

介绍了中国石油四川石化有限责任公司硫磺回收装置尾气提标单元应用的络合铁脱硫(CTS)工艺技术;阐述了工艺运行过程中出现的影响装置长周期安全环保运行的各项问题的改进措施,包括使用高效脱硫溶剂、CTS反应器升级改造、更换CTS单元循环溶液助剂、过滤机滤布优化调整和含硫尾气技术改造等。通过上述各项改进措施的实施,进入反应器的H 2S浓度显著降低,反应器积硫粉突破的次数明显减少,循环溶液的各项质量明显提升,过滤机硫粉滤出量较改造前增加3倍,外排烟气实现长期超低达标排放。上述改进措施实施后较为彻底地解决了CTS单元各项运行问题,装置运行关键参数稳定,总硫收率提高,保证了硫磺回收装置安全环保长周期运行,可作为同类装置技术改造的参考。

The technology of complex iron desulfurization(CTS)applied in the tail gas upgrading unit of the sulfur recovery joint plant of PetroChina Sichuan Petrochemical Co.,Ltd.was introduced.This paper expounded the improvement measures for the problems that affected the operation cycle,safety and environmental protection of the plant were described,including the use of high efficiency desulfurization solvent,CTS reactor upgrading,replacement of CTS unit circulating solution additives,filter cloth optimization and technological transformation of sulfur-containing tail gas.Through the implementation of the above improvement measures,the mass concentration of H 2S entering the reactor was significantly reduced,the number of breakthrough times of sulfur accumulation in the reactor was significantly reduced,the quality of the circulating solution was significantly improved,the amount of sulfur powder filtered out of the filter increased by 3 times as compared with that before modification,and the exhaust gas achieved long-term ultra-low emission standard.After the implementation of the above improvement measures,the problems in the operation of the CTS unit were completely solved,the key parameters of the device were stable,the total sulfur recovery rate was significantly increased,and the sulfur device was safe and environmentally friendly for a long period of operation,which could be used as a reference for the technical transformation of similar devices.