在敞焰无氧化加热炉里,为了得到无氧化气氛。天然气必须在过剩空气系数α≤0.5的情况下燃烧。但是在这种情况下,采用普通的套管式烧嘴燃烧天然气,会产生大量碳黑,恶化炉气成分,降低炉子经济性,并且使操作困难。因此,对于无氧化加热火焰炉,必须采用能保证煤气在燃烧时不产生碳黑的烧嘴。对金属无氧化加热炉而言,带环流圈的高热强度燃烧煤气的装置是有前途的结构。该装 In the open flame non-oxidizing furnace, in order to get an atmosphere without oxidation. Natural gas must be burned with the excess air factor α ≤ 0.5. However, in this case, burning natural gas with a common bushing burner produces a large amount of carbon black, deteriorates the composition of the furnace gas, reduces the furnace economy, and makes the operation difficult. Therefore, for the oxidation-free heating furnace, must be used to ensure that the gas does not produce carbon black combustion burner. In the case of metal-free furnaces, a device with a high thermal intensity for gas combustion with a circulator is a promising structure. The equipment