मोबाइल को कंप्यूटर की तरह इस्तेमाल करे
BOILER PARTS (Water wall and Drum)
Boiler Parts : Water walls Almost all modern power boilers are equipped with water walls. In large boilers, water walls completely cover the interior surfaces of the furnace providing practically complete elimination of exposed refractory surface; Waterwalls serve as the only means of heating and evaporating the feed water supplied to the boiler from economizers . Waterwalls usually consists of tangential vertical tubes and are connected at the top and bottom to headers. These tubes receive water from the boiler drum by means of downcomers connected between drum and Waterwalls lower header (Bottom Ring Header). In a boiler approximately 50% of the heat released by combustion of fuel in the furnace is absorbed by Waterwalls. Heat so absorbed by the Waterwalls is used in evaporation of water supplied to the boiler. The evaporated steam supplied to Boiler Drum again by mean of riser tubes from top header of water wall. W/W Top Header water wall of a thermal powe...
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