Reboiler (also weighing the boiling device) as the name suggests is to make the liquid once again vaporization. Its structure is similar to the condenser, but one is used to cool, and then the boiling device is used to heat vaporization. 

One of the heat exchangers is a special heat exchanger, which can exchange heat and has a vaporization space. The liquid level of the material and the liquid level in the distillation column are in the same height. From the bottom line of the tower to provide liquid phase into the re boiling device. The liquid phase of 25-30% is usually evaporated in the. Is the vaporization of two-phase flow is sent back to the fractionation tower and return tower in the gas phase component to on the tray, and liquid phase group points out back to the bottom of the tower. 

Material in the reboiler heat expansion and vaporization, smaller density, thus leaving vaporization space, smooth return to the tower, return to the tower of gas-liquid two-phase, opposite the gas passing through the tray fluid to meet fall to the bottom of the tower. Due to the static pressure difference, the bottom of the tower will continue to add to the evaporation of the part of the liquid level.