How to maintain the cold pump in low-temperature methanol washing? The mechanical seal keeps leaking badly
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How to maintain the cold pump in low-temperature methanol washing? Our cold pump’s mechanical seal keeps leaking. The leakage is relatively less once the pump starts running, but it increases significantly shortly after it stops I hope some expert can give me some advice? How exactly should the mechanical seal of a cold pump be maintained?
What flushing protocol is being used? 11+52+62 (nitrogen)?
The methanol in the lean and rich streams resulting from low washing is generally not pure; there is often a lot of scaling inside the mechanical seals, and the elastic components tend to fail. Problems with the internal seals can cause alarms related to the liquid level or pressure in the white oil tank, and it’s time to carry out maintenance at that point. If the external seals also start to leak, methanol may leak into the environment. For routine maintenance, it’s necessary to ensure a proper supply of nitrogen as well as intact seals; close attention should be paid to the liquid level and pressure in the white oil tank. The vent line connected to the white oil tank must be kept open, and operations should be carried out according to the correct procedures
Please check what material the auxiliary seal is made of – is it not resistant to low temperatures? Please also describe the specific operating conditions. I’m not very sure. :lol