| 摘要 |
Method and device for scrubbing air containing noxious substances, utilizing absorption and catalytic substances. The object of the invention is to purify air from noxious substances it contains by utilizing simultaneously absorption and catalytic masses, the usefull life of said masses being substantially long. This result can be achieved by this method because the air (which is led to the filter) heavy with noxious substances with, for example, So<u2>u, NO<u2>u, NO and CH links, is first subjected to a partial oxidization in a layer of soda lime, and then in a layer of catalyzer, for example hopkalite, preferably from NO into NO<u2>u; the air is then circulated through the activated carbon layer and warmed up on a heating installation, and then fed to a second catalytic layer, for example in order to change CO into CO<u2>u, the hopkalite layer being preferably followed by a cooling zone through which the purified air is brought back into the cabin. The absorption and catalytic layers are set in succession according to the temperature raise they are subjected to. The noxious substances contained in the air intake (1), which consist for example in SO<u2>u, NO<u2>u, NO, CO and HC, are changed into SO<u3>u and NO into NO<u2>u by adding ozonized air (10) and purified by the absorption and catalytic masses by means of the HC links. Ozonized air is added through a bypass (10) to the air to be purified, or fed directly to an ozonizer (11), ozonization being preferably made electrically. |
