气烧石灰竖窑工艺特点及改进

Process Features and Improvement on Gas Burning Lime Upright Stove

与焦炭竖窑相比 ,气烧石灰竖窑具有窑内气流量大、石灰活性度高、室内温度均匀、温度易控制、对燃气选择要求不高、热耗高等特点。济钢对气烧石灰窑进行改进 ,将圆柱型窑形改为矩形 +弓形 ,并重新设计了出灰机结构 ,在除尘烟道上串联增设了空气、煤气换热器 ,使石灰的生、过烧率低于 7% ,减少了出灰机的断齿、断轴现象 ,而且节约了煤气。

Compared with coke upright stove, gas burning lime upright stove has the features of greater gas flow in stove, higher lime activity, uniform temperature, temperature control being easy, the requirement for selection on gas being low and higher consumption of heat. The gas burning lime upright stove is improved at Jigang. The cylinder form was changed as rectangular plus arcuate forms, the structure of lime discharge machine was redesigned, the air and gas heat exchangers are connected in series in dedusting flue. The rate of raw and over burning of lime is less than 7%, the breakages of tooth and shafts on lime discharge machine are decreased and gas is saved.