Separation tank after the reactive product air cooler in continuous reforming; corrosion of 304 foam breaker mesh
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In the liquid separation tank located after the reactor product air cooler in continuous reforming, the 304 foam-breaking mesh has become corroded and damaged; it breaks easily when pulled, having lost its toughness. What type of corrosion is this?
In the liquid separation tank behind the air cooler of the continuous reforming reaction products, the 304 foam-breaking mesh has become corroded and broken; it breaks easily when pulled, having lost its toughness. Generally, this situation is intergranular corrosion, as the liquid separation tank contains substances such as CO2, H2S, and H2O, creating an acidic environment inside the tank that facilitates intergranular corrosion.
It was meant to be a cover-up; I’ve learned this. Is this serious situation due to poor selection of materials? ? ?
That’s not my opinion; there’s basically no CO2 or H2S, so it should be intergranular corrosion caused by chloride ions.
After pre-hydrogenation of the feed naphtha, the sulfur content in the refined naphtha feed to the continuous reforming reactor system is generally less than 0.2 ppm； To maintain the water-chlorine balance, the water content in the recycled hydrogen is generally kept at around 20 ppm. Therefore, it is unlikely that the foam-breaking mesh in the liquid separator after the reaction product air cooler is suffering from H2S corrosion; rather, it should be chlorine corrosion.
I tend to agree with the view that chlorine causes corrosion.