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Combustion Evaluation: Sources and Control Devices
VI BCR* AUTOMATIC "PACKAGED" BOILER This unit is a complete steam or hot water generating system, incorporating a water- cooled vibrating grate as the firing mechanism (Figure 6). Coal is delivered from the storage bin to a hopper from which it travels on the vibrating grate to the fuel bed.
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Boilers
Fire-Tube Boiler (~1800) The fire tube boiler, the oldest design, is made so the products of combustion pass through tubes surrounded by water in a shell. The furnace/flame volume can either be inside or external to the shell that contains the water. The upper steam capacity of fire tube boilers is about 20,000 Ibm/hr, and the peak pressure
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