600MW电站锅炉烟气含氧体积分数优化策略研究

以某600Mw燃煤机组为例，在调节烟气含氧体积分数的基础上，增加一次风配比、二次风配比和燃尽风风门开度调整试验，分析了烟气含氧体积分数对锅炉经济性的影响，并对烟气含氧体积分数进行优化，提出了有关优化策略．结果表明：在400Mw、500Mw和600Mw3种负荷下，最佳运行烟气含氧体积分数分别为3．8％、3．2％和2．3％，可以有效降低发电成本和风机电耗，提高锅炉整体热经济参数及降低NOx排放质量浓度，为锅炉安全运行和节能减排提供依据．

Study on Optimization of Flue Gas Oxygen Content for a 600 MW Coal-fired Boiler

Taking a 600 MW coal-fired power unit as an example, the influence of flue gas oxygen content upon economic efficiency of the boiler was analyzed based on adjustment tests of the oxygen content, the primary air ratio, the secondary air ratio and the opening degree of overfire air damper, after which some strategies were put forward and taken for optimization of the flue gas oxygen content. Results show that for the load of 400 MW, 500 MW and 600 MW, corresponding optimum oxygen content in flue gas is re spectively 3.8%, 3.2% and 2.3%, under which condition, the power generation cost, the fan power con sumption rate and the NO, emission concentration are to be lowered, resulting in increased overall thermo economic parameters of the boiler. This may serve as a reference for safety operataion, energy conservation and emission reduction of similar coal-fired boilers.