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Boiler AIR AND FLUE GAS SYSTEM
"We talked before about At this article we will make a focus ** air and flue gas SYSTEM at boiler." -The Boiler air and flue gas system c**sists of combusti** air system, gas recirculati** system and flue gas system. -The combusti** air system c**sists of two forced draft fans, two steam coil air heaters and two air heaters. Two 60% capacity centrifugal forced draft fans are provided to supply the combusti** air to the windbox and after air port with adequate flow rate and pressure for combusti**. The forced draft fan draws air from the atmosphere through the inlet silencer, and discharges air to the steam coil air heater, the air heater and the windbox. Modulating inlet vane of the centrifugal forced draft fan c**trols the combusti** air flowing to the boiler wind box and after air port. Air heater inlet air damper creates the suitable backpressure for seal air supply through the forced draft fan outlet c**necting air duct. -Combusti** air flow is measured by flow element located at the outlet of air heater. Two 50% capacity, bi-sector, vertical shaft regenerative type air heaters are provided to heat combusti** air using flue gas from the ec**omizer. To achieve in-furnace NOx reducti**, two-stage combusti** system using the after air port dampers is applied. Part of the combusti** air is supplied to the after air ports for two-stage combusti**. The after air port damper (4 dampers) c**trol shall be modulated to maintain the optimum two-stage combusti** at each load.
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مشكووووووووووووووووووووووووووووووور
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#3
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مشكور على الكتاب
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العلامات المرجعية |
الكلمات الدلالية (Tags) |
boiler, flue, system |
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المواضيع المتشابهه | ||||
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