一氧化碳变换装置改造总结

某合成氨企业一氧化碳变换装置原设计采用高水气比耐硫变换工艺,针对该装置在试生产中出现的问题,进行原因分析并提出相应的优化改造措施。改造后,预变换催化剂使用寿命由6个月延长至2年,中压蒸汽消耗从134 t/h降至101 t/h,装置出口变换气中CO体积分数由0.45%(干基)降至设计值0.40%(干基),吨氨消耗粗煤气量由2 115 m3(标态,干基)降至2 106 m3(标态,干基),达到节能降耗、长周期稳定运行的目的。

Sum-Up of Renovation of Carbon Monoxide Shift Converter

In a certain ammonia plant the original design of the carbon monoxide shift converter is based on the sulfur-resistant conversion process with a high water-gas ratio,and in view of the problems in trial production of the converter causes are analyzed and relevant optimized renovation measures proposed.After the reform the service life of the pro-conversion catalyst prolongs from 6 months to 2 years,the consumption of medium-pressure steam reduces from 134 t/h to 101 t/h,the CO volume fraction of the exit shifted gas drops from 0.45%(dry basis) to the designed value of 0.04%(dry basis),and the consumption of crude gas decrease from 2 115 m3(standard conditions,dry basis) per ton of ammonia to 2 106 m3(standard conditions,dry basis),meeting the aim of energy saving and decrease in consumption and stable operation in a long period.