Shell and tube heat exchanger
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If there is an internal leak in a shell and tube heat exchanger, will the temperature of sulfur trioxide at the outlet increase or decrease? What happens if it gets blocked? If the export increases by 60 degrees, what could be the possible reasons?
In a shell-and-tube heat exchanger, the gas with a higher temperature, namely the SO3 conversion gas coming out of the converter, flows through the tube side, while the gas with a lower temperature, namely the SO2 gas coming from the absorption tower, flows through the shell side. If there is a leak in the tube side of the heat exchanger, the outlet SO3 temperature should increase. If it gets blocked, the temperature should drop. An increase in temperature could also be due to a problem with the bypass valve of the heat exchanger. Additionally, consider the temperature of the SO2 gas at the outlet of the absorption tower. This is my personal opinion for reference only.
If it gets blocked, won’t the heat exchange efficiency decline? Won’t the temperature of the outlet pipe rise?
I’m not quite sure why the temperature rises when it’s missing; could you please explain it to me? Thank you
Sulfur dioxide flows in the shell side, with a pressure higher than that of sulfur trioxide in the tube side. The temperature is lower than that of sulfur trioxide. If the temperature is missed, shouldn’t it be lower?
How is it possible that the pressure in the shell side is higher than that in the tube side? The sulfur dioxide in the shell side comes from the absorption tower, while the sulfur trioxide in the tube side comes from the converter. Which one has a higher pressure?
The original poster’s reasoning has some issues; if there is an internal leak in the heat exchanger, the poster can make a judgment based on changes in the temperature of the converter bed or the parameters of the exhaust gas. The fact that the flue gas temperature has risen by 60 degrees, as mentioned by the poster, basically indicates that the heat exchanger is blocked!
To be more specific, if the flue gas temperature rises by 60 degrees and the heat exchanger leaks, just how severe would that leakage have to be? It’s likely that the operating parameters of the conversion process will get out of control!
When there is leakage, it occurs from the side with higher pressure to the side with lower pressure; in the case of blockage, it has little impact on the heat exchange efficiency, only increasing the system resistance.