四角切圆煤粉锅炉燃烧工况评判方法研究

Study of Methods for Evaluating and Judging the Combustion Conditions of a Tangentially Corner-fired Boiler

针对现有锅炉燃烧工况评判方法不足的实际情况,结合某300MW四角切圆煤粉锅炉实炉运行工况,在确定各影响因素之间具有较强相关性后,用主成分分析法提取相关因子。再按各因子的方差贡献率加权相加并计算得分,用因子变量代替原有变量评价各影响因素作用的大小,依此得到的综合评价结果可正确反映锅炉的实际运行工况。与现有锅炉燃烧工况评判方法相比,避免了各因素之间不可比性给评判决策造成的困难。使应用此方法运行具有了明显的优越性。

In the light of the actual situation that the currently available methods for evaluating and judging the combustion conditions of a boiler are insufficient and in combination with the actual operating conditions of a 300 MW tangentially corner-fired pulverized coal boiler,a main component analytic method was used to extract correlative factors after a relatively strong correlation has been confirmed being present among various influencing factors.Subsequently,the factors were weighted as per their mean square deviation contribution rates and added up to calculate the scores.Factor variables were used to replace the original variables for evaluating the magnitudes of the roles played by various influencing factors.The comprehensive evaluation results thus obtained can correctly reflect the actual operating conditions of the boiler.Compared with the currently available methods for evaluating and judging the combustion conditions of a boiler,the above-mentioned method can avoid the difficulty for evaluation,judgement and policy-making caused by the incomparability of various factors,making the operation realized by using the method in question enjoy a conspicuous superiority.