Questions about falling film reboilers
Thread Content
Gentlemen, I would like to ask when a falling film reboiler is used? The pressure drop in falling film reboilers is generally very low (a few mbarA), but how high can it go? Why such a low pressure drop?
Wow, which expert can offer some advice?
Nucleated film evaporation is generally used in situations where the concentration is high and the viscosity is high (as film flow relies on gravity and the liquid’s wettability to the tube walls), as well as in cases with relatively low evaporation rates; however, it is not suitable for the evaporation of materials that tend to crystallize or form structures easily. Furthermore, when using a falling film evaporator, in order to ensure a uniform distribution of the liquid film along the tube walls, a distributor must be installed at the top of the evaporator. The reason for using low pressure in falling film is that solutions at low pressure evaporate more easily, which helps to save steam usage. As for exactly how much it can be reduced, it depends on the properties of your material