Abstract:

Research of mode of air distribution and total air volume for a 330MW boiler in a certain power plant,were carried out to analysis the influence of mode of air distribution and total air volume variation on concentration of NO_x emission and economical operation of the boiler. Result of the test showed that under the constant Unit load, change the air distribution mode, under 250MW load, the efficiency of the boiler at working condition T2 is similar to that of the boiler at working condition T1, concentration of NO_x emission decreased by 40mg/m³, under 300MW load, the efficiency of the boiler at working condition T4 is 0.28% higher than that of the boiler at working condition T3, concentration of NO_x emission decreased by 20mg/m³.Under the condition that the unit load and other operation parameters are basically invariable,change the total air volume,under 300MW load, the efficiency of the boiler at working condition T6 is 0.19% higher than that of the boiler at working condition T5, concentration of NO_xemission decreased by 40mg/m³. Under 250MW load, the efficiency of the boiler at working condition T9 is 0.16% higher than that of the boiler at working condition T7, concentration of NO_xemission increased by 40mg/m³. Under 190MW load, the efficiency of the boiler at working condition T12 is 0.24% higher than that of the boiler at working condition T10, concentration of NO_x emission decreased by 60mg/m³.

Key words: mode of air distribution, total air volume, concentration of NO_x emission, economical operation of the boiler, efficiency of the boiler

摘要：

针对某电厂330MW锅炉进行了配风方式及总风量的研究，分析了配风方式及总风量的变化对NO_x排放浓度和锅炉经济性的影响。结果表明：在机组负荷一定的条件下，改变配风方式，当机组负荷为250MW时，工况T2与工况T1的锅炉效率相差不多，NO_x排放浓度下降了40mg/m³；当机组负荷为300MW时，工况T4比工况T3的锅炉效率高了0.28%，NO_x排放浓度下降了20mg/m³。在机组负荷及其他运行参数基本不变的条件下，改变总风量，当机组负荷为300MW时，工况T6比工况T5的锅炉效率高了0.19%，NO_x排放浓度下降了40mg/m³；当机组负荷为250MW时，工况T9比工况T7的锅炉效率高了0.16%，NO_x排放浓度升高了40mg/m³。当机组负荷为190MW时，工况T12比工况T10的锅炉效率高了0.24%，NO_x排放浓度下降了60mg/m³。

关键词: 配风方式, 总风量, NO_x排放浓度, 锅炉经济性, 锅炉效率