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    • 7. 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。
    • 8. 发明授权
    • Adsorption method
    • 吸附法
    • US3980454A
    • 1976-09-14
    • US545089
    • 1975-01-29
    • Yukio HishinumaZensuke TamuraSyunzi Enomoto
    • Yukio HishinumaZensuke TamuraSyunzi Enomoto
    • B01D53/04C01B17/775
    • B01D53/04C01B17/775B01D2253/102B01D2257/302B01D2259/40092
    • A contaminant, such as sulfur dioxide, is removed from a fluid, such as hot exhaust gas, by passing it through beds of material for removing the contaminants, such as activated carbon for adsorbing the sulfur dioxide as sulfur trioxide; periodically, the bed is regenerated by discontinuing the passage of process fluid therethrough and passing through the bed a regenerating fluid, such as water, with quantities of the regenerating fluid being successively passed through the bed with corresponding decreasing amounts of contaminants, such as sulfuric acid within the water, in the respective quantities of regenerative fluid. At least one further bed of material is regenerated with substantially the same regenerative fluid in substantially the same succession of concentrations, but out of phase so that a quantity of regenerative fluid of one contaminant concentration is passed completely through only one bed of material prior to its passing through another bed of material. Preferably, after passing through one bed of material, the regenerative fluid is of the next highest concentration and passes through another bed of material in the sequence of the next highest concentration.
    • 通过使其通过用于除去污染物的材料床(例如用于以二氧化硫吸附二氧化硫的活性炭)将诸如二氧化硫的污染物从诸如热废气的流体中除去; 周期性地,通过停止工艺流体的通过并通过床将再生流体例如水再生,使再生流体的量连续地通过床,同时减少量的污染物例如硫酸 在水中,各自的再生流体的量。 基本上相同的再生流体基本上以相同的一系列浓度再生至少一个另外的材料床,但是异相再生,使得一个污染物浓度的再生流体的量在其之前仅通过一个材料床 穿过另一张床。 优选地,在通过一个材料床之后,再生流体具有下一个最高浓度,并且以下一个最高浓度的顺序通过另一个材料床。