Waste heat boiler deskbook by V Ganapathy

By V Ganapathy

Covers the layout and alertness of waste warmth boilers for business, cogeneration and municipal good waste purposes. genuine existence case reviews reduction realizing the specification, operation and alertness of waste warmth boilers. additionally contains brief minimize equipment for sizing gear and crucial info on warmth and fabric balances. Environmental issues together with NOx and CO emissions are provided. an essential reference for engineers, experts and executives fascinated by specifying, working, engineering, advertising and comparing waste warmth boilers or warmth restoration steam turbines.

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Fired Furnace fired Gas Inlet Temp. 5 800 - 1000 UNFIRED HRSGs When the plant steam requirements are such that the energy in the exhaust gases is adequate, an unfired HRSG is selected. Typical gas temperature entering the HRSG ranges from 800° to 1050°F, depending on the gas turbine used. Figure 1-7a shows a two-gas pass design with a superheater, evaporator and economizer. This design occupies a small floor space. The evaporator tube bundle is divided into two portions by using a baffle plate.

56%. 45 MMBtu/h. RECENT TRENDS AND THEIR IMPACT ON HRSG DESIGNS With improvements in firing temperature in the gas turbine to 2400-2500°F range and higher pressure ratio, the exhaust gas temperature is likely to be higher, on the order of 1050 to 1150°F. This may necessitate a larger HRSG with additional heat recovery surfaces and possible reheaters, as in conventional utility boilers, which can improve the combined cycle efficiency by 2 to 3%. Gas turbines are also being used with solid fuels such as coal and wood.

95 8 hexane· ? 5 9 hydrogen. 0 14 hydrogen sulfide· EXHAUST GAS FLOW·L3IH,TEMP·F=? 0 ? ALYSIS·%VOL OF C02,H20,N2,02=? 2 BURNER DUTY·BTU/H,FINAL TEMP·FHnput zero for the unknown}=? 5 3 propane· 0 4 butane- 0 5 isobutane· 0 6 pentane· 0 7 isopentane. 0 8 hexane- 0 9 hydrogen. 5 13 water vapor· Q 14 hydrogen sulfide· 1 If the fuel input to the burner in Btu/h is known, the fuel quantity is obtained and the flue gas analysis and quantity are computed. The final enthalpy is obtained and, through an iterative process, the corresponding temperature is found.

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