Due to the accumulation of sediment, not only the heat exchange of the shell-and-tube heat exchanger is invalid, but also the tube bundle is corroded, and a gap is formed between the tube end and the tube sheet, which eventually leads to the tube-and-tube heat exchanger tube bundle, tube sheet, shell, and head. Damage, severely, the two fluids mix and destroy normal operation, or even need to be replaced with new equipment. These are the hazards of the shell-and-tube heat exchanger, then how should we maintain the shell-and-tube heat exchanger and Maintenance?
1. Install a filtering device at the inlet of the fluid of the shell-and-tube heat exchanger and carry out water treatment. Reduce the biological slime, scale and corrosion of the circulating water in the shell-and-tube heat exchanger.
2. Remedying the failure of the connection between the tube bundle and the tube sheet, re-expansion, welding and expansion welding.
3. For pipes that have been leaked, the pipe blocking method can be used as an emergency repair measure. Under normal circumstances, the total number of pipes should not exceed 10%. When there are more pipes, the pipe should be replaced.
4. Master the maintenance system for the degree of dirt, dirt and dirt.
5. When the ambient temperature is lower than 0 °C, the water in the shell-and-tube heat exchanger should be drained to avoid cracking.
6. Perform necessary chemical cleaning on the shell-and-tube heat exchanger.
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