甲醇合成催化剂失活问题分析与处理

介绍了Shell粉煤气化制甲醇工艺中甲醇合成系统流程及生产运行情况。对合成塔催化剂运行情况进行了总结;就催化剂失活、更换频率过快问题进行了分析;并对合成回路系统进行了一系列改造:在现有合成塔上并联1台新的合成塔,分担现有合成塔一部分负荷,以降低现有合成塔催化剂生产强度,降低床层热负荷,增强催化剂抗中毒能力,延长催化剂寿命。结果表明:改造后,降低了经济运行成本,每年直接节省334万元,且确保了装置的长周期、高负荷稳定运行。

Analysis and Processing of Deactivation Problems of Catalyst Used in Methanol Synthesis

The Shell coal gasification process in the methanol synthesis process and the system production operation were introduced.Catalyst for methanol synthesis reactor operation was summarized.The problem of catalyst deactivation and the too fast change frequency were analyzed.In order to solve the above problems,a series of reformation in synthesis loop system were made.In existing synthesis tower in parallel,a new synthetic tower shared synthesis tower part load in order to reduce the catalyst production strength in the existing synthetic tower,cut down bed heat load,enhance catalyst poisoning resistance and extend the life of the catalyst.Results showed that after modification,the economic cost was reduced and 3.34 million yuan each year was directly saved.The stable operation of the devices in high load and a long period were ensured.