| 摘要 |
The present invention relates to a method and an apparatus for cleaning extensive air volumes containing low concentrations of pollutants of hydrocarbons, with which method and apparatus the hydrocarbons are caught during a first phase in an active carbon or a metal filter alternatively a honeycombed vessel surface covered by active carbon or any other adsorbent, whereafter during the consecutive phase the caught hydrocarbons are released and converted in a conventional catalyst (11) to carbondioxid and water. The apparatus comprised of one filter (1) mounted in a ventilation system for the process air, which by use of a trottle (8) can be sealed off from the process air and thereby create mainly a closed circuit, where the filter (1) is converted to a mixing chamber (16) connected to a heating battery (10) which in turn is connected to a catalyst (11) for further transport of the cleaned air mixture via an inlet (17) containing a fan (12) and a heating battery (13) and back to the filterbeds existing in mixing chamber (16) in order to recondition the same. |
