Steps for switching the vacuum tower reboiler

When switching the reboiler of the vacuum distillation column, it is best to first establish a vacuum in the backup reboiler and ensure that it is completely empty before gradually opening the liquid inlet manual valve of the backup reboiler to slowly introduce liquid into the reboiler. Once the reboiler is filled with liquid, the previously used reboiler is shut down and the backup reboiler is switched in. The advantage of doing this is that it prevents situations such as loss of control over the liquid level and alternating mixing of liquid and gas phases during the switching process, thereby ensuring the stability and safety of the production process. .

The specific steps are as follows: 1. Close the inlet manual valve of the reboiler currently in use； 2. Open the vent valve at the top of the reboiler to allow the gas inside the reboiler to escape ； 3. Slowly open the manual valve at the inlet of the standby reboiler to allow the oil inside the reboiler to gradually flow into the standby reboiler ； 4. Also close the top exhaust valve to prevent gas from entering the standby reboiler ； 5. When the liquid level in the standby reboiler reaches the set height, close the inlet manual valve of the standby reboiler ； 6. Open the vent valve at the top of the backup reboiler to create a negative pressure ； 7. Check again to ensure that the manual valve at the inlet of the standby reboiler is tightly closed, in order to prevent air leakage ； 8. The outlet valve of the standby reboiler can be opened to connect the standby reboiler to the vacuum distillation column, thereby replacing the original reboiler.