A reboiler is a heat exchanger used in distillation processes to provide the necessary heat for vaporizing liquid at the bottom of a distillation column. It plays a crucial role in maintaining column efficiency by supplying consistent heat, ensuring proper separation of components. Common types include kettle reboilers, thermosiphon reboilers, and forced circulation reboilers, each selected based on process requirements. Typically constructed from materials like stainless steel or carbon steel, reboilers use steam, hot oil, or other heating fluids as energy sources. Proper design, operation, and maintenance are essential to prevent fouling, improve heat transfer efficiency, and ensure long-term reliability in industries such as oil refining, petrochemicals, and chemical processing.