前后对冲旋流燃煤锅炉CO和NO_x分布规律的试验研究  

Experimental Study on CO and NO_x Emission of a Swirl-opposed Coal-fired Boiler

作　　者：李德波[1] 沈跃良[1] 

机构地区：[1]广东电网公司电力科学研究院,广州510060

出　　处：《动力工程学报》2013年第7期502-506,554,共6页Journal of Chinese Society of Power Engineering

摘　　要：针对某电厂600MW超临界机组前后对冲燃煤锅炉CO排放质量浓度较高且局部易出现峰值、沿炉膛宽度方向左右侧偏差明显、在不同O2体积分数下变化较大的现象,通过现场试验分析了O2体积分数和燃尽风风量对CO和NOx排放质量浓度的影响,提出了降低CO排放质量浓度的调整控制措施.结果表明:该电厂前后对冲旋流燃煤锅炉的CO排放质量浓度较高是由于配风不均而造成的;关小侧燃尽风二次风挡板开度及燃尽风二次风和三次风挡板开度,有利于降低CO排放质量浓度;综合考虑CO和NOx排放质量浓度的变化趋势,运行O2体积分数为3.0%时较为合适.To solve the problems occurring in the swirl opposed coal-fired boiler of a 600 MW supercritical power unit, such as high and even peak mass concentration of CO in local area of the furnace, obvious deviation of CO mass concentration between left and right side along its width direction, and great changes of CO concentration under different conditions of oxygen volume fraction, etc. , corresponding countermeasures were proposed by analyzing the effect of oxygen volume fraction and overfire air volume on the CO and NO, mass concentration. Results show that the high mass concentration of CO is found to be caused by uneven air distribution, which can be improved by turning down the secondary air damper of the side air port, and the secondary and tertiary air damper of the after air port, comprehensively considering the varition tendency of CO and NOx mass concentration, the case of φ（O2）=3.0% is considered to be appropriate.

关 键 词：超临界机组 旋流燃煤锅炉 CO排放质量浓度 NOx排放质量浓度 试验研究 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]