Reboiler disengagement space

The kettle unit used in the reboiling service usually has an internal weir to maintain a fixed liquid level and tube coverage. The bottoms draw-off is from the weir section. The reboiling handled in horizontal thermosiphon units omits the disengaging space because the liquid-vapor mixture should enter the distillation tower where disengaging takes place. The chiller often keeps the kettle design but does not use the weir because no liquid bottoms draw off when a refrigerant is vaporized. 

Ketde horizontal reboilers consist of either a U-bundle or a shell and tube bundle inserted into an enlarged shell. The enlarged shell provides disengaging space for the vapor outside and above the liquid, which is usually held by level control at the top level of the tube bundle or possibly a few in. below the top of the tubes. The heating medium is inside the tubes. 

Low boilup rate and decrease in steam pressure steam trap blowing, see Section 5.1. Low boilup rate, pressure increase in reboiler and surges ]foaming] /inerts/leaks/ undersized reboUer/diameter of vent line too small/top tubes not covered with liquid/high liquid level that floods the vapor disengagement space/inlet feed maldistribution/inadequate vapor disengagement. 

Total height of packing Spacing between beds (9)(4 ft) Disengaging and distribution Reboiler... 

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