In a dry moving bed type adsorption tower using a granular adsorbent, for example, for removing SO.sub.x and NO.sub.x from waste gases, the granular adsorbent entering the adsorption tower is previously rinsed with a gas in a feed pipe for the adsorbent, thereby avoiding the need to install a dust collector...http://www.google.es/patents/US4744804?utm_source=gb-gplus-sharePatente US4744804 - Dust pre-removal method in a dry moving bed type adsorption tower
Dust pre-removal method in a dry moving bed type adsorption tower
