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Show Flow design is illustrated in Figure 12, and the specifications which are different from the first scenario are I isted below. Total Stoichiometric Ratio Exhaust Gas Treatment(Dry+Wet) Exit Temperature 1. 40 55°C Reheater Exit Temperature Wet Exhaust Gas Volume 150°C(See Note Below) 157, 620Nm3/h Note: This is the temperature for white plume prevention only Power Generated: 16, 570KW; Overal I thermal Efficiency: 16.5% Naturai Gas 1--'---------l O2 I 6% I I .----....., NOXI 50ppm I Refuse (MSW) I Gas Cleaning Reheater~-~ I Equipment I .I 26at~ L_l I 295 rC 17. OOOKW I I Steam rL® :..- ______ J Turbine~ I I I Condenser c$r= : I I L ~ 25a~a_ J Figure 12 FLOW DIAGRAM FOR MSW FIRED POWER PLANT - WITH REBURNING 3.3 NATURAL GAS REBURNING & REPOWERING POWER GENERATION Stack There are several ways in combining a gas turbine generation with natural gas reburning system. The selection depends on the degree of importance you attach to the plant as a power generating entity. Assumption was made that the mainstay of this plant is power generation by the boi ler. That is, the exhaust gas from the gas turbine ia used to raise the temperature of the superheated steam from the MSW burning boi ler , and its exhaust is again used as the secondary air for the boi ler and to prevent white plume of the exhaust gas from the stack. With this scenario, the capacity of gas turbine is I imited by the capacity of the boi ler, and the total power generation capacity is kept within this parameter. We bel ieve that this nevertheless has one of the highest net power generation efficiency among the combined generation systems, 1 2 |