OCR Text |
Show Overall System NOx Removal Efficiency, E1 (%) 100 ,....----l __ - __ - .... - __ - __ - __ f----11I----I_---1I1-- . E2=100% 80 6400 -- .- , // •.- .. )I( 20 - *' ////8 ,/ ,/ /' ,.- ..... ~ -* , '- oo~ -----~2-0 ------4-0 -----~60- -----~80- -----~10 0 Recycled NOx Removal Efficiency in Combustor, E3 (%) Figure 2. NOx Removal Efficiency --E2= 90% -+ E2= 80% -.E2= 70% ~ E2=60% -Er E2=50% ~ The overall system NOx removal efficiency (El) is mainly dependent on and the N Ox adsorption efficiency in the adsorber ~ and the recycled N Ox reduction efficiency in the combustor <EJ). The relationship between these three efficiencies can be derived as shown in Equation (1) and Figure 2. EI = (1 ) Figure 2 is a plot of the overall system NOx removal efficiency versus the recycled NOx reduction efficiency in the combustor with varied NOx adsorption efficiency. -It shows that, for a given NOx adsorption efficiency, the more recycled NOx reduced in the combustor, the higher the NOx removed from the overall system. The overall system NOx removal efficiency also increases with the adsorption efficiency when the NOx destruction efficiency in the furnace is flXed . In a practical system, if the design 4 |