W火焰锅炉燃烧优化与改造技术研究和工程应用  

Investigations on the Combustion Optimization & Modification of W-Flame Boilers and Engineering Applications

作　　者：石践 陈玉忠 侯玉波 罗小鹏 

机构地区：[1]贵州电网有限责任公司电力科学研究院,贵州省贵阳市550002

出　　处：《中国电机工程学报》2016年第22期6187-6192,共6页Proceedings of the CSEE

摘　　要：结合数值模拟与现场试验对燃用低挥发分煤的W火焰锅炉所存在的燃烧稳定性和燃尽性能差等问题进行研究。针对3种主要类型W火焰锅炉技术特点,制定相应的改造及燃烧优化调整技术方案:对FW类型锅炉提出了高负荷时切除部分燃烧器的方法,并运用一种集成拱下风向调节和拱上配风优化的新技术;对MBEL类型发明一种改进型缝隙式燃烧器和拱下风导向技术;对B&W类型提出一种双调风旋流燃烧器二次风组合调整方法。上述方案实施后显著提高了W火焰锅炉燃烧稳定性和经济性,减少了污染物排放,在此基础上,提出一种以有限空间射流动量矩守恒为基础的W火焰锅炉稳燃、燃尽物理模型和优化设计准则。The issues such as W-flame boilers with poor combustion stability and poor burnout were investigated by using numerical simulations and experimental measurements. The modification and combustion optimization technology schemes were developed according to the technology characteristics of three types of W-flame boiler. For the Foster Wheeler（FW）-type boilers, some burners were closed at high boiler loads and a novel integrated scheme consisting of below-arch air direction adjustment and above-arch air distribution optimization was put forward. For the Mitsui Babcock Energy Ltd.（MBEL）-type boilers, a kind of new technology with the improved slit burners and below-arch secondary-air direction adjustment was proposed to improve the boiler performance. For the Babcock Wilcox（BW）-type boilers, a kind of dual channel swirl burner combining with above-arch secondary air adjustment method was used. And then, after application, the boiler combustion stability and economical performance are greatly improved, and the pollution emissions are reduced. Based on the above-mentioned work, a physical model and optimization design guidelines were proposed to improve the boiler performance according to limited space jet moment of momentum conservation.

关 键 词：W火焰锅炉 低挥发分煤 改造 优化调整 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]