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蓄热式加热炉在煤气换向阀切换为抽烟气时,烧嘴内的残余煤气与高温烟气发生二次燃烧,导致烧嘴局部温度瞬间高于蓄热体的最高使用温度,在高温和氧化铁粉末的共同作用下会造成煤气烧嘴第1层蓄热体出现开裂、变形、气孔堵塞的现象。研究了在加热炉上增设一套烟气反吹系统以解决蓄热体局部过烧的问题。实际应用效果表明,该系统以低温烟气将煤气烧嘴及支管内的残余煤气置换到炉内进行燃烧,不仅能杜绝煤气在烧嘴内发生二次燃烧,有效地控制蓄热体温度,延长其使用寿命,还能大幅度降低烟气中CO的含量,减少化学能耗损失和环境污染。
Regenerative heating furnace When the gas switching valve is switched to smoking gas, the residual gas in the burner and the high temperature flue gas undergo secondary combustion, resulting in the local temperature of the burner instantaneously higher than the highest use temperature of the regenerator, The combined action of iron oxide powder will cause cracking, deformation and clogging of the first regenerator in the gas burner. A set of flue gas backflushing system was added to the heating furnace to solve the problem of local overheating of regenerator. The practical application shows that the system uses low temperature flue gas to displace the residual gas in the gas burner and the branch pipe into the furnace for combustion, which can not only prevent the secondary combustion of the gas in the burner, effectively control the temperature of the regenerator, Its service life, but also significantly reduce the CO content in the flue gas to reduce the loss of chemical energy consumption and environmental pollution.