How to prevent vacuuming in the bottom pump of a atmospheric and vacuum distillation unit! ?
Thread Content
As the title suggests—how to prevent vacuuming in the bottom pump of a atmospheric and vacuum distillation unit! ?
This is calculated during the device design. It mainly relies on the height of the tower; the pressure head generated by the material at the bottom of the tower is greater than the net positive suction head of the pump.
Design the outlet flow rate of the liquid-controlled control pump based on the bottom liquid level. It comes included as part of this atmospheric and vacuum distillation design.
During the design, care was taken to ensure there is sufficient height from the bottom of the tower; when the new pressure reduction unit was installed, its height was increased by 2 meters compared to the original design (the original pressure reduction tower was shorter, while the new one is approximately 7 meters tall). Personal suggestions regarding operations: 1 is to seal the oil supply to prevent water ingress or pressure fluctuations ； 2 is to properly control the backflow at the middle section during operation, in order to prevent light components from reaching the bottom of the tower.
1. Stabilize various parameters in the pressure reduction system, such as vacuum level, top temperature, bottom temperature of the tower, and reflux rate, to prevent fluctuations in the quality of the oil at the tower bottom due to variations in system operation. 2. Ensure the quality of pump maintenance to prevent the pump from being evacuated due to air leakage through the seals.
In addition to the methods mentioned above, it is possible to maintain a stable vacuum, or reduce the vacuum level slightly while appropriately raising the outlet temperature of the furnace. Another method is to ensure a certain pressure at the pump outlet. We’ve encountered it too; no, we resolved it. It’s by using the above methods that it can be completed without any investment. Another utterly stupid method is to dig a hole.