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Show II) Nlb/Nox rat i 0 .. ... . . .... .. . . ... ..... 1. 2 1-5) Catalytic denitrification lIethod 1) Theory of NOx removal This is the method in which the flue gas at the temperature below 570°F (300~) with ammonia gas is passed through a catalyst and NOx is decomposed to harmless H20 and N2 according to the following reaction formula: 4NO + 4NH3 + 02 ~ 4N2 + 6H 20 2H02 + 4Hlh + 02 ~ 3H 2 + mbO 2) Test systems of catalytic denitrifi cat ion i ) Flow Figs . 1-31 and 1-32 show the flow of t es t system used in the test equipment at two exi s ting plants : A Plant B Plan t 400ton /24h x 3 furna ces 100 to n / 2~h x 2 furn aces ii) Outl in e of l es t quipment and t es t. p('r iod The Outline of test equipment and t s t peri od are as shown be low: Configuration of catalyst Composition of cata lyst Quantity of flue gas (Hm3/H) SV value (h - 1) Flue gas tell-perature ( ~ ) . Test period B Plant ---- -- -- Honeycomb Pe I lel Ti-V Ti-V 350 300 8,800 2,600 250-270 250-270 From Dec. 1981 to present 1 (test IS st III be JOg cont inued) 1 2 f\ Pl:=tnt - - ---- - --- - - - lIoncyeomb Pe II et Ti-V Ti-V 500 250 3,700 2,780 280, 250 280, 250 From Jan. 1984 to Mar. 1 1986 |