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74309d7132 Schematic diagram of typical coal-fired power plant steam generator highlighting the air preheater (APH) location. ISBN0-412-06401-4. Heat Exchangers: Selection, Rating and Thermal Design (2nd ed.). Another type of air preheater is the regenerator used in iron or glass manufacture. Cookies are required to use this site.
Wiley Interscience. Sometimes mild explosions may be detected in the control room by variations in the inlet and outlet temperatures of the combustion air. In certain cases the unburnt deposits may occur on the air preheater elements causing it to catch fire during normal operations of the boiler, giving rise to explosions inside the air preheater. Today due to technological advance many manufacturers may use their own patents. The seals allow the element to rotate through all the sectors, but keep gas leakage between sectors to a minimum while providing separate gas air and flue gas paths through each sector. In this RAPH, the dust laden, corrosive boiler gases have to pass between the elements of air preheater baskets. However, by far the most significant cause of dew point corrosion is the metal temperature of the tubes. Steam: Its Generation and Use (41st ed.). Homepage SlideShare Channels Popular Presentations .. Ambient air is forced by a fan through ducting at one end of the preheater tubes and at other end the heated air from inside of the tubes emerges into another set of ducting, which carries it to the boiler furnace for combustion.