【摘要】 针对某1 000 MW超超临界机组旋流对冲锅炉存在的CO排放质量浓度高、排烟温度高、锅炉效率低于设计值等问题,结合锅炉二次风箱的结构特点,通过数值模拟分析及现场试验对燃烧器配风进行优化调整。结果表明:优化后锅炉在1 000 MW和750 MW负荷下,CO排放质量浓度分别由2 822 mg/m~3、1 795 mg/m~3下降至146 mg/m~3、106 mg/m~3,排烟温度分别下降11.7 K、12.5 K,锅炉效率分别上升1.34百分点、1.19百分点,优化效果显著。更多还原

【Abstract】 To solve the problems occurring in the swirl-opposed firing boiler of a 1 000 MW ultra-supercritical unit, such as high emission mass concentration of CO, high temperature of exhaust gas and low efficiency of boiler, etc., optimization and adjustment were conducted on the air distribution mode based on simulation analysis and on-site test results, considering structural features of the boiler secondary air box. Results show that at the unit load of 1 000 MW and 750 MW after optimization, the CO emission reduces from 2 822 mg/m~3 and 1 795 mg/m~3 to 146 mg/m~3 and 106 mg/m~3 respectively, with exhaust gas temperature being reduced by 11.7 K and 12.5 K, and boiler efficiency being increased by 1.34% and 1.19%, indicating obvious optimization effectiveness of the boiler.更多还原