Combined operation of low-temperature methanol washing
Thread Content
After the combined operation of low-temperature methanol washing, nitrogen purging is required. Which areas need to be purged? Is it still necessary to recycle methanol for water removal?
It is best to use nitrogen for drying for as long as possible; after drying is complete, methanol should be used to remove any remaining moisture from the system!
After the methanol washing process is completed while driving, nitrogen should be used to drive out any remaining water inside the system~! Be careful of some turns and dead corners to prevent too high water levels in the system~! After that, a methanol washing cycle is established to use a methanol-water separation tower to separate the residual water in the system~! During operation, the water content in methanol should be reduced as much as possible, in order to minimize corrosion of the equipment when the ammonia content in methanol is insufficient
Whether it is purging or carrying out methanol circulation, the main goal is to ensure that the water content in the system meets the specified standards! ! ! Just doing this one thing will be enough!
It mainly prevents high water content. . More rows should be arranged for backwashing and dead corners. Multiple permutations.
Only purge with N2, mainly in the dead corners. It is best to purge with N2 until it is dry
http://bbs.hcbbs.com/viewthread.php?tid=446577&highlight=%CB%AE%C1%AA%D4%CB http://bbs.hcbbs.com/viewthread.php?tid=429118&highlight=%CB%AE%C1%AA%D4%CB They can definitely be combined into one thread.
I don’t think it’s necessary to use methanol circulation for water removal anymore. When drying with nitrogen, attention should be paid to the drainage lines and various dead zones. After nitrogen drying is completed, how much water remains in the system? The required water content for low-temperature methanol washing is less than 2%; to meet this standard, about 25 tons of water would be needed. It seems unlikely that there could be such an amount of water in the system. In my opinion, this is not possible. Based on what some companies that are already in operation have experienced, they continue to function even when the water content exceeds the specified limits. Furthermore, when using methanol circulation for water removal, so much methanol is circulated and then discharged there, making it difficult to handle it later on. Moreover, it seems that those in the same industry who drive vehicles generally don’t take this step. Of course, from a technical perspective, it’s better to do it rather than not, but from an economic standpoint, I don’t think it’s necessary.