| 摘要 |
<p>Particulate matter in a gaseous stream is electrically charged prior to its introduction into a granular bed filter comprising material which may become electrically conducting at the high gas temperature used, such that the filter collection efficiency is enhanced by resulting electrical image charge forces. As shown, the particle charging means 38 is located in the gas flow path prior to the whole of the filter bed chamber 8. Alternatively, the charging means may be located between two stages of the filter bed. <IMAGE></p> |
