OFEN MIT EINEM STRAHLROHRBRENNER MIT ZWEISTUFIGER BRENNSTOFFZUFUHR.

摘要

The present invention relates to a low NOx radiant tube burner. The radiant tube burner consists of; a primary combustion chamber (6) which is located outside of the furnace (14) and having an injection outlet (21) of the combustion gas located approximately more inside of the furnace (14) than the bung of the radiant tube (1), a primary fuel nozzle (4) which injects primary fuel into the primary combustion chamber (6), and a secondary fuel nozzle (7) which is surrounded with refractory material and injects secondary fuel into the radiant tube (1) from the area adjacent to the injection outlet (21). Approximately the total amount of the combustion air is supplied into the primary combustion chamber (6) with primary fuel under a high excess air ratio creating primary combustion. The low concentration of oxygen remaining in the primary combustion gas combined with the secondary fuel creates secondary combustion.