某公司一期工程5万t/a甲醇装置于2003年建成投产,二期工程10万t/a甲醇装置于2005年建成投产。两套装置中共有甲醇水冷器5台,为甲醇装置中甲醇液化工段的关键设备。一期工程的2台甲醇水冷器在2003~2005两年的运行期内,先后多次出现管程泄漏,停车维修。由于没有解决根本问题,开车不久再次泄漏,最短一次运行期仅为20天;2005年末,二期的2台水冷器也开始发生泄漏,更换换热管束后,仍发生相同问题。如此频繁开停,严重影响系统产量, A company a project 50,000 t / a methanol plant put into operation in 2003, the second phase of 100,000 t / a methanol plant put into operation in 2005. There are 5 methanol water coolers in both sets of equipment, which is the key equipment of methanol liquefaction section in methanol plant. The first phase of the two methanol water coolers in the 2003-2005 two years of operation period, there have been many pipe leakage, parking maintenance. In the absence of a solution to the fundamental problem, it leaked again shortly after driving and the shortest operation period was only 20 days. In the late 2005 and the second phase, two water coolers also started to leak. The same problem still occurred after replacing the heat exchange tube bundle. So frequently open stop, seriously affect the system output,