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    • 6. 发明授权
    • Apparatus for elimination of nitrogen oxides from combustion waste gases
    • 用于从燃烧废气中去除氮氧化物的装置
    • US4003711A
    • 1977-01-18
    • US514130
    • 1974-10-11
    • Yukio HishinumaHidetoshi AkimotoZensuke TamuraFumito Nakajima
    • Yukio HishinumaHidetoshi AkimotoZensuke TamuraFumito Nakajima
    • B01D53/86B01D53/94B01J8/18B01J27/00B01J27/043B01J27/28B01J38/48F23J15/00B01J8/12B01J23/94F01N3/15
    • B01J23/94B01D53/9413B01J38/485F23J15/00B01D2251/2062B01D2255/20707B01D2255/20738
    • Nitrogen oxides (NOx) are removed from combustion waste gases by injecting gas (NH.sub.3) into the combustion waste gases in the presence of a metallic catalyst to deoxidize the nitrogen oxides to nitrogen and water, within a reaction tower having the catalysts moving through the reaction tower, so that thereafter the dust may be separated from the catalysts and the catalysts may be regenerated continuously, so that the regenerated catalysts may be returned to the reaction tower. The catalyst moves in a substantially closed path, and preferable downwardly through the reaction tower, with the ammonia gas and combustion waste gases moving in cross current through the reaction tower, with mixing being enhanced by a plurality of angled baffle plates. Regeneration is accomplished by washing the catalysts, particularly ferrous catalysts with water to remove ferric sulfates, thereafter providing ferrous sulfates on the surface of the ferrous catalysts, and thereafter heating the catalysts with combustion gases separate from the ammonia gases, to dry the catalysts prior to their moving into the portion of the reaction tower having therein the mixed ammonia gas and combustion waste gases.
    • 通过在催化剂移动通过反应的反应塔内,在金属催化剂的存在下将气体(NH 3)注入到燃烧废气中以将氮氧化物氧化成氮和水,从而从燃烧废气中除去氮氧化物(NOx) 塔,从而可以将灰尘与催化剂分离,并且可以连续再生催化剂,使得再生催化剂可以返回到反应塔。 催化剂在基本上封闭的路径中移动,并且优选向下通过反应塔,氨气和燃烧废气在交叉电流中移动通过反应塔,混合通过多个成角度的挡板增强。 通过用水洗涤催化剂,特别是含铁催化剂以除去硫酸亚铁,然后在亚铁催化剂的表面上提供硫酸亚铁,然后用与氨气分离的燃烧气体加热催化剂,将催化剂干燥,然后在 它们进入其中具有混合氨气的反应塔部分和燃烧废气。