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Definition of Boilers

Definition of Boilers. Boiler Vessel that heats water to become hot water or steam At atmospheric pressure water volume increases 1,600 times Hot water or steam used to transfer heat to a process. Types of Boilers. Fire Tube Boiler Water Tube Boiler Packaged Boiler

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Definition of Boilers

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  1. Definition of Boilers • Boiler • Vessel that heats water to become hot water or steam • At atmospheric pressure water volume increases 1,600 times • Hot water or steam used to transfer heat to a process

  2. Types of Boilers • Fire Tube Boiler • Water Tube Boiler • Packaged Boiler • Fluidized Bed (FBC) Boiler • Stoker Fired Boiler • Pulverized Fuel Boiler • Waste Heat Boiler • Thermic Fluid Heater (not a boiler!)

  3. Boilers for Various Applications

  4. Boilers • Babcock and Wilcox • Benson • Cochran • Cornish • Lamont • Lancashire • Stirling • Velox

  5. Boilers based on Firing 1. Fire Tube Boiler is • Relatively small steam capacities (12,000 kg/hour) • Low to medium steam pressures (18 kg/cm2) • Operates with oil, gas or solid fuels (Light Rail Transit Association)

  6. Type of Boilers 2. Water Tube Boiler is • Used for high steam demand and pressure requirements • Capacity range of 4,500 – 120,000 kg/hour • Combustion efficiency enhanced by induced draft provisions • Lower tolerance for water quality and needs water treatment plant (Your Dictionary.com)

  7. Assessment of a Boiler Heat Balance Balancing total energy entering a boiler against the energy that leaves the boiler in different forms 12.7 % Heat loss due to dry flue gas BOILER 8.1 % Heat loss due to steam in flue gas 1.7 % 100.0 % Heat loss due to moisture in fuel 0.3 % Fuel Heat loss due to moisture in air 2.4 % Heat loss due to un-burnts in residue 1.0 % Heat loss due to radiation & other unaccounted loss 73.8 % 73.8 % Heat in Steam

  8. Mountings and Accessories • Fitting and devices which are necessary for the safety and control are knows as boiler mountings • Fitting or devices which are provided to increase the efficiency of the boiler and help in the smooth working of the plant are knows as boiler accessories

  9. Fittings - Safety • Water level indicators • Safety valves • Combined high steam and low water safety valve • Fusible plug

  10. Fittings - Control • Pressure gauge • Junction or stop valve • Feed check valve • Blow-off cock • Man hole and Mud Box

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