Economiser (Water Pre-heater)

The economiser uses flue gas heat to pre-heat feed water before it enters the boiler, improving efficiency and reducing fuel costs. Hot flue gas flows outside the heat exchange tubes, water flows inside and absorbs heat, and feed water temperature can increase by 20–60°C. The equipment is manufactured from ASTM A192 or A106 GrB standard cast steel tubes, designed to maximize heat exchange efficiency between hot flue gas and water, ensuring high thermal performance and long-term durability in harsh operating environments. Dai Dong Quang provides economisers with new designs or reverse engineering from existing equipment, suitable for direct replacement without changing the system structure.