Injection and shutdown of hydrogenation high-pressure air-cooling corrosion inhibitors
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What is generally used as a basis for injecting or stopping the injection of corrosion inhibitors in the high-pressure air coolers of hydrogenation units? Is it appropriate to decide whether to inject corrosion inhibitors based on process anti-corrosion parameters such as the iron ion content in high-sulfur wastewater?
If it is a corrosion inhibitor, then iron ions are the determining factor. Our system has a process for injecting demineralized water before air cooling, and the corrosion inhibitor is injected from that source
Generally, conventional gasoline and diesel do not contain corrosion inhibitors; however, corrosion inhibitors are necessary in the hydrogenation processes for wax oil or residue
Generally, only water is injected; the corrosion inhibitor should be added in the heavy oil hydrogenation unit
Many devices were originally designed with injection, but most have been changed to water injection
Our facility adds both water and high-pressure corrosion inhibitors; the decision to use corrosion inhibitors is made based on tests of iron ion levels, with the key parameters provided by the corrosion inhibitor manufacturers
However, the new hydrogenation unit in our facility only uses pre-cooling water injection, without the addition of high-pressure corrosion inhibitors; only a bypass system is used for injecting low-pressure corrosion inhibitors
The iron ion concentration in our highly acidic water is very high