Preferential baffle reboiler-Part 2

摘要

Distillation towers consume ~30% of the energy in a refinery or petrochemical facility.The reboiler is the stomach of the distillation tower that consumes the energy to separate the components.Any improvement in design or operational flexibility will save the energy and profitability of the plant.Two main types of reboilers are in use:a circulating(conventional)re-boiler and a once-through reboiler.Part 1 of this article,which delivered a brief introduction of the preferential baffle reboiler and its working principle,was published in the April issue.If designed accurately a preferential baffle reboiler(baffle with hole)or baffle with underflow can provide benefits;otherwise,it can show detrimental effects.Part 2 will describe the design of the preferential baffle reboiler with the help of hole size,shape of the hole,and elevation of the hole in the baffle.It also provides recommendations and guidelines for optimum design.In this type of preferential baffle reboiler,the elevation,shape and diameter of the hole are all important.