Waste air cleaning device

Device for thermally and/or catalytically cleaning waste air that contains combustible constituents, wherein said device comprises a combustion chamber (114), at least two receptacles (102) containing heat storage mass (106), through which gases are able to flow, for heating the waste air (untreated gas) to be cleaned before it is introduced into the combustion chamber (114) and for heating the heat storage mass (106) with the cleaned waste gas (clean gas) arriving from the combustion chamber (114), an untreated gas channel (128) for feeding the untreated gas to the receptacles (102) and a clean gas channel (156) for discharging the clean gas from the receptacles (102), wherein each receptacle (102) contains at least one inlet opening (126) through which untreated gas is introduced into the receptacle (102) from an untreated gas channel (128) and at least one outlet opening (152) through which clean gas is discharged from the receptacle (102) into the clean gas channel (156), and wherein the inlet opening (126) leads into a precombustion chamber (118) arranged between the inlet opening (126) and the heat storage mass (106) of the receptacle (102), characterized by the fact that the surface normal (136a) of at least one inlet opening (126) of at least one heat storage mass receptacle (102) is oriented transverse to the mean flow direction (138) through the heat storage mass (106) of the receptacle (102), and by the fact that the precombustion chamber (118) has a section (122) with a cross section that widens toward the heat storage mass (106).