Apparatus for cleaning pollutant-laden waste gas

An apparatus for cleaning pollutant-laden waste gas by regenerative thermal afterburning having two towers containing heat-retaining packing and connected at their upper ends via a combustion space, a channel (29) for supplying loaded gas to be cleaned and a channel (23) for removing clean gas which are adapted to be connected with the two towers by shut-off devices operated by control units for alternately supplying loaded gas and removing clean gas, which comprises:

• each tower (1, 2) being divided into at least two heat-retaining chambers (14 to 16, and 17 to 19) by partitions (10 and 11, 12 and 13) extending from the bottom to the top of the tower, the heat-retaining chamber of one tower being connected to the opposite heat-retaining chamber of the other tower by one switching chamber (26, 27, 28) in each case, the switching chambers (26, 27, 28) being disposed between the two channels (29, 23) for supplying loaded gas and removing clean gas, and each switching chamber (26, 27, 28) being adapted to be connected alternately with said loaded gas supply channel (29) and the clean gas removal channel (23) by the shut-off device operated with the control units.