低水气比工艺在Shell煤气变换节能改造中的应用

介绍合成氨原料路线“煤代油”改造工程中变换工艺流程，比较高、低水气比变换工艺的优缺点．高水气比变换工艺存在蒸汽消耗量大、催化剂床层超温等问题，2011年实施了低水气比变换工艺改造。改造后，变换工艺装置运行稳定，节能降耗效果显著。

LOW S/G RATIO PROCESS USED FOR ENERGY SAVING REVAMP IN CO SHIFT UNIT IN SHELL GASIFICATION

This paper gives an introduction to the CO shift process flow in feedstock ＂oil-to-coal＂ revamp project to produce synthetic ammonia. By comparing the advantages and disadvantages of low S/G ratio CO shift process with high S/G ratio process, it＇s found that high S/G ratio process has the disadvantages of large consumption of steam and overtemperature of catalyst bed. To solve the problems, a revamp by using low S/G ratio process was successfully conducted in 2011. Analyzing the catalyst selection and catalyst filling for low S/G ratio process, the revamped unit run steadily for four （4） months after commissioning, and presented remarkable results in energy saving and consumption reduction.