Multi-Stage Evaporators are industrial systems used for concentrating solutions by evaporating the solvent (usually water) from a mixture. They operate by using multiple evaporation stages, where the vapor from one stage is used to heat the next stage, improving energy efficiency. The solution is progressively evaporated in each stage, typically under reduced pressure, to avoid excessive heat and preserve the quality of the product. Multi-stage evaporators are widely used in industries like food processing, chemicals, pharmaceuticals, and wastewater treatment to concentrate liquids, such as juices, syrups, or brine, while minimizing energy consumption. They are valued for their high efficiency, reduced operational costs, and ability to handle large volumes.