基于循环流化床垃圾焚烧炉的实际工况，验证碳酸氢钠对约400℃的烟道气中二GFDA1英合成的抑制能力。实验结果表明，循环流化床形式的垃圾焚烧炉烟道气中的二GFDA1英浓度变化较大；在烟道气流量约为25万m³/h、温度约为400℃工况下，烟道内形成二GFDA1英的抑制率随着碳酸氢钠喷射量的增加而增加，当碳酸氢钠的喷射速率达到1.1 t/h时，二GFDA1英的抑制率达到约90%；当碳酸氢钠连续喷射时间不低于2 h且喷射量不低于0.7 t/h，烟道内二GFDA1英的抑制率高于60%。

To inhibit the formation of dioxins in flue gas from the circulating fluidized bed (CFB) used in the waste incineration process,a pilot-scale equipment with NaHCO₃ spraying into the 400℃ flue gas is developed.The experimental results show that the concentration of dioxins in flue gas from CFB varies greatly.The inhibitory effect of NaHCO₃ on the formation of dioxin increases with the increasing flow rate of NaHCO₃ when the flow rate of flue gas is 250 000 m³·h^-1 with a temperature of 400℃.The inhibitory effect can approach about 90% if the flow rate of NaHCO₃ reaches at 1 100 kg·h^-1.Given the requirements of the project,the inhibitory effect on the formation of dioxin exceeds 60% when the duration of NaHCO₃ spraying into the flue gas is not less than 2 hours,with a flow rate not less than 700 kg·h^-1.

龙宝玉(1983-),男,硕士,工程师,研究方向为水和大气污染控制及资源化,13585624128@163.com