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  2. Air preheater - Wikipedia

    en.wikipedia.org/wiki/Air_preheater

    The purpose of the air preheater is to recover the heat from the boiler flue gas which increases the thermal efficiency of the boiler by reducing the useful heat lost in the flue gas. As a consequence, the flue gases are also conveyed to the flue gas stack (or chimney ) at a lower temperature, allowing simplified design of the conveyance system ...

  3. Flued boiler - Wikipedia

    en.wikipedia.org/wiki/Flued_boiler

    In the flued boiler, any sediment fell past the furnace flue and settled out at the bottom of the boiler shell, where it had less effect. [ 5 ] In model engineering , the Cornish boiler, particularly when fitted with Galloway tubes ( see Lancashire Boiler, below ), is an excellent choice for gas-fired boilers and model steam boats.

  4. Staged combustion - Wikipedia

    en.wikipedia.org/wiki/Staged_combustion

    Retrofitting over-fire air on an existing boiler involves water-wall tube modifications to create the ports for the secondary air nozzles and the addition of ducts, dampers, and the wind-box. This technique is currently used in 116 pulverized coal-fired units on a total capacity of 50 gigawatt electrical (GW e) as a standalone measure.

  5. Flue - Wikipedia

    en.wikipedia.org/wiki/Flue

    A flue is a duct, pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors. Historically the term flue meant the chimney itself. [1] In the United States, they are also known as vents for boilers and as breeching for water heaters and modern

  6. Industrial furnace - Wikipedia

    en.wikipedia.org/wiki/Industrial_furnace

    The fluid to be heated passes through the tubes and is thus heated to the desired temperature. The gases from the combustion are known as flue gas. After the flue gas leaves the firebox, most furnace designs include a convection section where more heat is recovered before venting to the atmosphere through the flue gas stack. (HTF=Heat Transfer ...

  7. Draft (boiler) - Wikipedia

    en.wikipedia.org/wiki/Draft_(boiler)

    In a water boiler, draft is the difference between atmospheric pressure and the pressure existing in the furnace or flue gas passage. [1] Draft can also be referred to as the difference in pressure in the combustion chamber area which results in the motion of the flue gases and the air flow.

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