Catalysis - Two reactors - Hot spots - Temporary treatment measures
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To address hot spots that occur in catalytic converters, the following solutions can be used: A: Blow steam at the hot spot to lower its temperature; B: Enclose it in a box to allow for ventilation and cooling. C: Steel plate reinforcement. D: Using industrial air to cool down the hot spots. My question is: why is steam used for cooling? Wouldn’t using industrial air be better? Can Plan B really work?
Steam will be used for cooling, and it is necessary to consider this from the perspective of industrial stress!
For example, when a red-hot iron plate is placed in ice water, it deforms due to the temperature difference – this is the phenomenon of stress! Steam is chosen over air because it has a temperature difference with the material, but this difference is smaller than that with air, resulting in lower stress!
We now use method C: steel plate reinforcement. Wind and steam are generally not used for cleaning, as hot spots occur when there are problems with the lining inside. Without the protection of a lining, the steel plate is not wear-resistant and leaks occur very quickly
But the steam blown will spray small water droplets, isn’t that even worse?
Even for steam protection here, superheated steam is used. By bringing water with you, you are essentially quenching certain parts of the metal surface, and that’s not necessarily a good thing! There’s another phenomenon I’m not sure if you’ve noticed: the cooling steam for the smoke gas wheel generally gets preheated outside the housing before entering! Its function is also to prevent the impact of steam carrying water on the equipment. Maybe I’m being a bit picky, but it’s better to avoid it if possible, what do you think? If nothing else works, one has to choose the lesser of two evils!