Types Of Boiler• Fire Tube Boiler• Packaged Boiler• Water Tube Boiler• Fluidized Bed Boiler• Stoker Fired Boiler• Pulverized Fuel Boiler
Fire Tube Boiler • Comparatively small steam capacities (12,000 kg/hour). • Low to medium steam pressures. • It is operated by oil, gas or solid fuels.
Water Tube Boiler • Used in high steam demand and pressure. • Capacity Range - 4,500 – 120,000 kg/hour • Lower tolerance in water quality
Packaged Boiler • It comes in complete package. • Main Features • High heat transfer • Good combustion efficiency • High thermal efficiency • Faster evaporation • Good convective heat transfer • Classified based on number of passes
FCB• Sand is suspended in high velocity air stream• Combustion temperature 840° – 950° C• Capacity - 0,5 T/hr to 100 T/hr• Fuels: coal, washer rejects, rice husk, biogases and agricultural wastes
Stoke Fired Boilersa) Spreader stokers• Coal is first burnt in suspension.• Flexible.• Widely Used Boiler.
Stoke Fired Boilersb)Traveling Grate Stoker • Coal is burnt on moving steel grate • Coal gate controls coal feeding ratio
Pulverized Fuel Boiler• Combustion temperature - 1300 -1700 °C• Benefits: Quick response to load changes and high pre- heat air temperatures
Glow Worm Boilers• Glow worm boilers are highly demanded now a days. Every industry is asking for this boiler.
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