Liquids are boiled from the base of a distillation column to generate vapours, which are returned to the column to drive the distillation separation. The heat supplied to the column by the reboiler at the base of the column is removed by the condenser at the top of the column.
We design kettle reboilers to allow heating fluid to pass through the tubes that are covered in the liquid, which needs to be distilled. Steam flows through the tube bundle and exits as condensate while the liquid from the base of the tower flows through the shell side. Any vapour that is created passes up to be collected, and the liquid by-product drops to the bottom of the kettle, making its way back to the tubes.
Fired reboiler is a pressure vessel filled with process fluids, and has tubes running through the vessel. The tubes heat up the process fluids as per the process requirements. A pump is required to circulate the column liquid through the heat transfer tubes.
Forced circulation reboilers
A forced circulation reboiler requires a pump to push the liquid to circulate through the reboilers. Depending on the process liquid, this is useful as the flow may be either once-through or recirculating. We can locate this reboiler type far from the main column.
There are two primary types of thermosiphon reboiler: vertical or horizontal. The kind of thermosiphon used will depend on the orientation of the heating fluid tubes and on the flow of the liquid. These reboilers work on a simple principle based on the difference of densities of liquid and vapour for recirculation between the outlet and inlet line. We don’t need an external pump to inject the vapour into the column.
As a recognised manufacturer of reboilers, we can help you to get the best equipment for your application.
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