Discussion on the structure of the exhaust gas condenser for reduction
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The exhaust gas condenser has severe leakage, primarily occurring at the welds of the tube sheet; preliminary analysis suggests that this is caused by large temperature differences leading to cracking The structure of this condenser is: single tube sheet, straight tubes; the shell side contains water while the tube side contains exhaust gas, and there is no pre-cooling jacket. Currently, following the practices of other manufacturers, we intend to use the following structure; please share your opinions actively: double tube sheets, U-shaped tubes. Water flows in the shell side, while exhaust gas flows in the tube side. The materials used for those in direct contact with the exhaust gas will be 316L, while the rest will be carbon steel. Everyone, please share your thoughts on the structure of this condenser!
Is there an expansion joint? Can we use a cooler with an expansion joint instead?
Given that the temperature of the exhaust gas exiting the reduction furnace is particularly high, using just one heat exchanger is not suitable due to the large temperature difference; 2 or 3 heat exchangers can be used, arranged in series first and then in parallel.
Isn’t there air cooling before restoring the exhaust condenser? We had air-cooled ones before