INFLUENCE OF OVER-FIRED AIR ADJUSTMENT IN BOILER FOR IMPORTED ULTRA-SUPECRITICAL 600 MW UNIT UPON NOx EMISSION AND ECONOMIC EFFICIENCY IN OPERATION OF THE BOILER
LIU Qi1, L Guo-qiang1, YU Cun-xi1, et al. INFLUENCE OF OVER-FIRED AIR ADJUSTMENT IN BOILER FOR IMPORTED ULTRA-SUPECRITICAL 600 MW UNIT UPON NOx EMISSION AND ECONOMIC EFFICIENCY IN OPERATION OF THE BOILER[J]. Thermal power generation, 2009, 38(9): 52-53.
LIU Qi1, L Guo-qiang1, YU Cun-xi1, et al. INFLUENCE OF OVER-FIRED AIR ADJUSTMENT IN BOILER FOR IMPORTED ULTRA-SUPECRITICAL 600 MW UNIT UPON NOx EMISSION AND ECONOMIC EFFICIENCY IN OPERATION OF THE BOILER[J]. Thermal power generation, 2009, 38(9): 52-53.DOI:
超超临界600MW机组锅炉燃尽风调整对NOx排放及锅炉经济性的影响
摘要
某电厂超超临界600MW机组锅炉飞灰可燃物含量较高
实测空气预热器进口CO含量高达3276μL/L
锅炉效率实测值90.96%
低于锅炉设计效率(93.3%)。对此
进行了关小U附加风门
L附加风门和燃尽风门以及开大周界风门的燃烧调整。调整后
飞灰可燃物含量降低了约50%
烟气中CO含量大幅降低
锅炉效率提高超过2个百分点。
Abstract
With regard to the boiler for ultra-supercritical 600 MW unit in one power plant
the unburned combustibles content in fly ash is higher
the actually measured CO content at inlet of the air preheater is up to 3 276 μL/L
the measured value of boiler efficiency is 90.96%
being less than the designed value of 93.3%.For this
combustion adjustment has been carried out under three operating conditions.After adjustment
the content of unburned combustibles in fly ash decreases 50%
the CO content in flue gas reduces by a big margin
and the boiler efficiency enhances by 2 percentage points.