The falling film evaporators are industrial devices that are used for heat sensitive component solutions. These are a special kind of heat exchanger. In simple words, falling film evaporators are the device used by industries for evaporation and concentration. These evaporators are used by the concentration and evaporation industries for the evaporation and condensation of the water, solutions in the pharmaceutical, organic solvents, food, light industries, chemical, and other industries. The falling film evaporators are majorly the collection of an evaporator, a separator, a preheater, a condenser, and a condensate tank. The falling film evaporators are generally made of 4-8m of tubes confined in steam jackets. One of the most important tasks is to divide the solution in an orderly manner while using the falling film evaporators.