| 摘要 |
<p>Methods and devices for simultaneously removing major pollutants (e.g., fly ash, nitrogen oxides and sulfur oxides) from flue gases and other gas streams requiring purification are disclosed. The untreated gas is passed through a cross-flow structure (10) which includes a porous wall (20) treated with a chemically-active substance. As the gas flows through the porous wall (20), particulate pollutants, such as fly ash, are trapped. At the same time, non-particulate pollutants, such as nitrogen oxides, sulfur oxides and hydrogen sulfide, react with the active substance and are converted to species which can be absorbed to the walls of the cross-flow structure. The non-particulate pollutants can also be converted to harmless reaction products and released into the environment.</p> |
