| 摘要 |
The invention relates to a burner arrangement for industrial furnaces (10) with narrow radiant tubes (20) in particular. The burner arrangement according to the invention has at least one radiant heating tube (22). The burner arrangement has a first regenerator (48), which is arranged on a first end (24), and a second regenerator (50), which is arranged on a second end (26) of the radiant heating tube (22), the first regenerator (48) and the second regenerator (50) being connected to a valve arrangement (54). The valve arrangement (54) has a first operating state and a second operating state for alternatively applying combustion air to the radiant heating tube (22) via one regenerator (48, 50) and discharging exhaust gases via the respective other regenerator (48, 50). At least one inner tube (34) is arranged within the radiant heating tube (22), said inner tube extending at least partly along the radiant heating tube (22). The inner tube (34) is connected to a fuel supply line (76) and has exit openings (46) which are arranged on the inner tube (34) along the length of the inner tube (34) and which connect the interior of the inner tube to the radiant heating tube (22) volume located outside of the inner tube. By dispensing fuel in stages and optionally using the locally present excess air, the formation of NOx is largely prevented. |
