Problems with the methanol-water separation tower in low-temperature methanol washing
Thread Content
Problems with the methanol-water separation tower in low-temperature methanol washing: Our methanol-water separation tower experiences significant fluctuations and cannot be controlled stably. I wonder how it is for others?
The methanol-water separation tower mentioned by the poster is a common problem in the industry. In 2004, relevant personnel at Jiujiang Large Fertilizer raised the issue of the methanol-water separation tower. The tower suffers from issues such as corrosion, blockages, and overloading, which cause large fluctuations in its operation. As a result, the water content in the circulating methanol often exceeds the specified limits, which in turn exacerbates corrosion and blockages within the system, creating a vicious cycle. These tower trays generally use bubble-type trays (floating valves, guided floating valves, sieve trays, differential floating valves). . . ), it is not suitable for the operating conditions of the methanol-water separation tower.
If it was normal before, analyze the changes in the composition of the shift gas entering the methanol wash
It would be best to include a trend chart; there are large fluctuations, and it’s not possible to maintain stability – the scope for imagination is too wide
Our operation is stable, without any fluctuations as mentioned above. It’s the tower wall that has been corroded and penetrated
Stabilizing the tower temperature and pressure will make things much better
First, set the temperature manually to a certain level, then identify the cause of the fluctuations. What should be done if no cause can be found?
Generally, it’s the tray that’s blocked; start the tower once to check whether the tray is blocked or not. If there are still fluctuations, check whether your regeneration tower is clogged.