Discussion on the injection method of corrosion inhibitors at the tower top
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Generally, corrosion inhibitors are injected at the tops of distillation columns in atmospheric and vacuum distillation units. What do the nozzles used for injecting these corrosion inhibitors look like? In what manner should corrosion inhibitors be injected into the overhead oil and gas pipelines to ensure proper protection of these pipelines? Corrosion in the overhead pipelines of our plant under normal pressure conditions is quite severe; we would appreciate it if experts could offer their guidance.
This post was last edited by ai444099439 on 2015-7-2 09:27. It doesn’t contain nozzles; the injection pipes extend deep inside. Inside there is a distributor with its edges cut at a 45-degree angle – in other words, the pipes are cut diagonally at 45 degrees, following the direction of fluid flow! It can be taken out for inspection when maintaining one’s own device, and there are relevant design standards for this! You can look up the corresponding standard requirements! Severe corrosion in the overhead pipeline of an atmospheric pressure tower requires investigating the problem from multiple aspects! The injection of corrosion inhibitors and similar substances can have a certain effect, but the fundamental issue remains electrodialysis-based desalination and dehydration. If the desalination problem is resolved, corrosion will be significantly reduced! Additionally, pipeline corrosion is a problem related to dew point corrosion; solutions need to be considered in light of the tower top temperature as well as the material of the equipment! The corrosion inhibitor injection port can have an impact, but it’s not the main issue!