以某660 MW超超临界二次再热锅炉为研究对象，建立了热力计算分区模型，研究了烟气挡板调节、烟气再循环以及摆动燃烧器对再热汽温的影响，并通过响应面回归法得出不同工况下的再热汽温回归模型。研究结果表明：锅炉最大连续蒸发量（BMCR）工况下，一次再热侧挡板每增加1%，一次再热汽温升高1.1 ℃，二次再热汽温降低1.8 ℃；回归模型能准确预测在不同调温方式作用下的再热蒸汽温度，最大误差仅4.9 ℃；该模型给出了蒸汽温度的影响因素显著性排序，其中，烟气挡板开度的变化对再热汽温的影响最大。

With a 660 MW ultrasupercritical doublereheat boiler as the research object,a thermodynamic calculation model with divided cells is established.The influence of gas damper regulation,flue gas regulation and swinging burners on reheat steam temperatures are studied.Regression models of reheat steam under different loads are obtained by response surface analysis.The results show that: For every 1% jump of damper opening in front flue，the primary reheat steam temperature rises 1.1 ℃ and secondary reheat steam temperature drops 1.8 ℃ under boiler maximum continuous rating (BMCR) condition.The regression models can predict the reheat steam temperatures under different regulation methods,and the maximum of errors is only 4.9 ℃.The impact order of regulating methods is obtained by the model,and the variation of dampers opening has the greatest influence on the reheat steam temperatures.

TK222

国家重点研发计划(2017YFB0602102)