为设计大型无氧化环形加热炉,我院于去年开始进行了能将空气予热到高温的金属蓄热器的试验工作。蓄热器内筒采用耐热钢材料,内径为170mm,内装满由φ2.5mm,直径铁铬铝丝绕成的螺旋管,内筒外侧用50mm厚陶瓷纤维绝热。试验过程中蓄热器进口烟气温度分别控制在900℃、1000℃、1100℃、1150℃,废气量为180Nm~3/h,换向时间分别为15秒、30秒、45秒,空气量在90Nm~3/h到180Nm~3/h间变化。试验结果表明,空气予热温度与烟气进口温 In order to design a large non-oxidizing toroidal heating furnace, our institute started the experiment of metal heat accumulator that can heat the air to high temperature last year. Heat accumulator inner cylinder with heat-resistant steel material, an inner diameter of 170mm, filled with φ2.5mm, diameter iron chrome wire wound spiral tube, the inner cylinder 50mm thick ceramic fiber insulation. During the test, the inlet flue gas temperature of regenerator was controlled at 900 ℃, 1000 ℃, 1100 ℃, 1150 ℃, and the exhaust gas volume was 180 Nm ~ 3 / h respectively. The reversing times were 15 seconds, 30 seconds and 45 seconds respectively. In the 90Nm ~ 3 / h to 180Nm ~ 3 / h between changes. The experimental results show that air preheating temperature and flue gas inlet temperature