Patent ID: 7510395

Claim:
Device for mixing and introducing gases, liquids or mixtures of gases and liquids into a hot reaction space, said device comprising at least one metal tube having a longitudinal axis and having an open reaction space end, and a feed end, which feed end is connected to an apparatus providing a means for feeding feed substances into the metal tube, characterized in that the outer surface of the metal tube is surrounded by a layer of heat insulating refractory material which extends in the direction of the longitudinal axis of the metal tube from the open reaction space end of the metal tube end, the open reaction space end having a wall thickness in a range of 0.1 to 3 mm, the wall thickness at the open reaction space end having a reduced thickness that has decreased continuously from an actual wall thickness of the metal tube for fast heat removal of heat absorbed at the open reaction space end of the metal tube to prevent overheating thereof.