煤基烯烃系统甲醇回收塔问题分析

Problem analysis of methanol recovery tower for coal-based olefins system

通过对甲醇回收塔进料量、循环甲醇、阀位、塔顶压力和塔底温度等工况参数对比分析,并采用GC-MS、XPS和焙烧等手段对结焦物进行表征,发现引起甲醇回收塔出现塔顶压力高、塔底灵敏板温度提温困难、废水中COD含量超标等现象的原因主要集中于超负荷运行和塔盘结焦。

The operating parameters of methanol recovery tower are compared and analyzed, such as feed quantity, circulating methanol, valve position, top pressure, bottom temperature and so on. The coke is characterized by GC-MS, XPS and roasting. It is confirmed that the overloaded operation and eoking tray are the main reasons for the abnormal phenomena in methanol recovery tower, such as tower top pressure, difficuhy in raising temperature for sensitive plate, COD content exceeded in wastewater,etc..