A COMPACT FIRE TUBE BOILER

摘要

A compact fire tube boiler (200) comprises: a first heat transfer zone (202) having a furnace (212) which receives flue gases having a pressure between 500-2000 mmWC and combusts a fuel therein, to generate flue gas at a temperature between 1300-1400 °C, wherein, in the first heat transfer zone (202), 30-35% of heat is extracted; a second heat transfer zone (206) having convective tubes (222) principally adapted to transfer the hot flue gases from the first heat transfer zone (202) to a third heat transfer zone (204) while extracting only 10-15% of heat therefrom; and the third heat transfer zone (204) which is the main convective pass having convective tubes (224), extracts 55-60% of heat therein. The compact fire boiler (200) reduces power consumption by 60-80% and footprint by 30%.