Relationship between the horizontal thermosyphon reboiler and the bottom of the tower
Thread Content
This post was last edited by Dongfang168 on 2012-1-7 at 22:32. In previous courses on Principles of Chemical Engineering, it was taught that the liquid level in the reboiler should be equal to the liquid level at the bottom of the tower; the liquid in the reboiler vaporizes when heated, and liquid from the bottom of the tower flows into the reboiler to maintain this equal liquid level. So why is the position of the reboiler in companies much lower than that of the bottom of the tower? Where should the reboiler be located at the bottom of the tower?
I would like to know the answer to this question too; please, experts, help me out.
It might be that the reboiler has sufficient capacity to completely vaporize the liquid. It can also prevent the phenomenon of vapor entrapping liquid
A much lower level is normal; by the end of the period, all heat exchange tubes must be submerged. The horizontal type is suitable for applications with high flow rates and low pressure differences
1. This approach is merely a empirical one and has not been based on rigorous calculations; as a result, the gasification rate and circulation volume cannot be controlled precisely. Therefore, rigorous calculations are necessary under more demanding process conditions. Especially in vacuum reboilers, which are typically used for heat-sensitive materials, strict control is required over the circulation rate, vaporization rate, and the temperature of the liquid returning to the tower. Therefore, it is necessary to calculate the static head in order to determine the relative position of the reboiler and the liquid level in the tower bottom. 2. For the owner’s example, I guess it’s like this: the process requirements dictate a lower temperature at the tower, so it is necessary to keep the gasification rate within a low range; this results in a higher static pressure head, which in turn leads to the reboiler being placed at a lower position.