Fire tube boiler also called shell boiler, the flue gas flows in fire tubes or smoke tubes, and heat the water, steam or the steam-water mixture outside the tubes. Compare with the water tube boilers, fire tube boilers have relatively smaller steam capacity, between 0.5~20t/h, and working pressure is between 0.7-1.6Mpa. This fire tube boiler has compact structure and convenient operation, strong load adaptability, lower water quality requirement.
Water tube boiler refers to the boiler that water, steam or the steam-water mixture flows in the tubes, and fire or the smoke are combustion and flow outside the flues. Compare with fire tube boilers, water tube boilers has the features of larger steam capacity and pressure, better heat transfer property and higher combustion efficiency, otherwise, the requirement on water quality is higher.
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