Discuss the issue of temperature difference in shell-and-tube heat exchangers?
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The unit has several shell-and-tube heat exchangers, and recently their cooling performance has been poor; in some cases the temperature difference is too large, while in others it is too small. The tube side carries cooling water, while the shell side carries the medium. What are the reasons for excessive temperature differences, and what are the reasons for insufficient temperature differences?
A large temperature difference should be normal; a small pressure difference is probably due to scaling in the shell-side circulating water
On the roof, it’s time to clean the heat exchange tubes
The poor heat transfer performance of shell-and-tube heat exchangers is mainly due to scaling, corrosion, and the formation of sludge, which adhere to the heat exchange surfaces and block the heat exchange tubes, thereby reducing the heat transfer efficiency~~