Abstract: Oxidizable components in an exhaust air or gas flow are burnt by a burner in a combustion chamber enclosed in a housing. For this purpose the exhaust air is distributed into inlet ends of heat exchanger pipes which have outlet ends near the burner. The arrangement is such that the exhaust air carrying oxidizable components flows through the heat exchanger pipes while the exhaust air freed of oxidizable components flows around the heat exchanger pipes. In order to permit effective heat expansions and contractions of the heat exchanger pipes, these pipes have an L-configuration with radially inwardly extending legs having inlet ends connected into perforations in a jacket forming an exhaust air distribution chamber, and with substantially axially extending legs having outlet ends leading close to the burner. An air inlet leads centrally into the distribution chamber and a cleaned air outlet leads out of the housing.

Abstract: In a method and apparatus for cleaning a gas flow that carries oxidizable pollutants in varying concentrations, the temperature within the combustion apparatus is maintained substantially constant by admixing controllable proportions of the gas to be cleaned and/or fresh air to the combustion flow. However, admixing prior to introducing the gas to be cleaned into the combustion flow is avoided by performing the admixing at a location near the exit end of a flue gas mixing pipe. This mixing location permits maintaining the combustion chamber temperature constant or at its rated level while simultaneously keeping the temperature of the flow control device at acceptable levels. The flue gas mixing pipe is arranged downstream and coaxially with a burner so that the admixing takes place after the combustion or carrier flow has already passed the burner at the entrance to the combustion chamber.

Abstract: An apparatus for burning pollutants in a carrier gas flow such as exhaust gases, is constructed as a compact unit. For this purpose a radial blower for the supply of the carrier gas which carries the pollutants is arranged directly in an inlet chamber of the gas cleaning apparatus. The inlet port of the inlet chamber is connected through a duct to the suction inlet of the radial blower. The compression outlet of the radial blower leads into a ring gap which in turn opens radially into the inlet chamber. For this purpose, the radial blower is enclosed by a blower housing which is arranged concentrically at one end of the housing opposite the burner arranged at the other end of the housing. The drive motor for the radial blower is mounted directly on the outside to an end wall of the housing of the apparatus.