A falling film evaporator is an industrial apparatus used to concentrate solutions, particularly when heat-sensitive materials are involved. This equipment operates by distributing a thin film of liquid over the inner surface of vertical tubes. The liquid enters from the top and flows downward, forming a film that evaporates due to the heat applied to the outer surface of the tubes. The vapor is subsequently collected and condensed, leaving behind a more concentrated liquid solution. Due to the high surface area and short contact time with heat, falling film evaporators are highly efficient and ideal for processing heat-sensitive materials, ensuring minimal thermal degradation and energy consumption.