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Thanks for all replies. I wish to ask you an objective question from those who have experience with hot spots with sponge coke. We all know that hot spots could happen as in the cited case of very low drum temperatures in cases feed interruption e.g. But in the case of normal operation and just a decrease of COT so that the drum inlet temperature were in the order of 896 F, considering proper cooling and quenching were latter implemented (to facilitate understanding the situation), would hot spots be able to happen? If not, what would be this minimum temperature in that coking reactions supression were in the region that hot spots could be expected?

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