超超临界旋流燃烧锅炉低NO_x高效燃烧试验研究  

Experimental Study on Low NO_x and High Efficiency of a Ultra-supercritical Boiler with Swirl Burner

作　　者：岳峻峰[1] 邹磊[1] 张恩先[1] 贾涛[1] 

机构地区：[1]江苏方天电力技术有限公司,江苏南京211102

出　　处：《锅炉技术》2015年第6期46-51,68,共7页Boiler Technology

摘　　要：针对某厂660 MW超超临界燃煤锅炉,通过变O_2体积分数、变不同层燃烧器风量分配方式、变内二次风量、变同层燃烧器风量分配方式和变燃尽风量等试验对其进行了性能优化研究。结果表明:投产后锅炉炉渣碳质量分数和CO排放体积浓度较高,但通过高O_2体积分数运行、开大内二次风量和设置合理的外二次风配风方式及燃尽风风门开度,可有效降低炉渣碳质量分数和CO排放体积浓度,其中内二次风量的影响最大;在各影响因素中,运行O_2体积分数和燃尽风量大小对NO_x排放影响最大。通过综合优化调整,锅炉性能得到明显改善,各项主要性能参数均达到或优于设计值。The 660 MW coal-fired ultra-supercritical boiler with swirl burners arranged in front and back walls, designed and made by DG, was put into production in a power plant. The boiler performance optimization tests were carried out by changing O2 volumetric fraction, different level burners＇ air-distribution, inner secondary air flow rate, same level burners＇ air-distribution, OFA（over fire air） flow rate. The test results showed that the slag carbon mass fraction and CO volume concentration were high, which could be effectively reduced by increasing operation 02 volumetric fraction and inner secondary air flow rate, setting the reasonable modes of outer secondary air distribution and proper position of OFA damper. In the above influence factors, inner secondary air flow rate has the most important effect on decreasing the slag carbon mass fraction and CO volume concentration, and the effects of operation O2 volumetric fraction and OFA flow rate on NOx emissions are maximum. After the comprehensive optimization, boiler performance was significantly improved, and its main performance parameters were achieved or exceeded than the design ones.

关 键 词：超超临界锅炉 旋流燃烧器 NO_X排放 灰渣碳质量分数 CO体积浓度 燃烧调整 

分 类 号：TK229.6[动力工程及工程热物理—动力机械及工程]