前后墙对冲旋流燃烧锅炉炉膛结渣试验研究和改造实践  

Experimental Study on Slagging Mechanism in an Opposite Firing Boiler and the Countermeasures

作　　者：党林贵 陈国喜 王春玉[2] 李敏[2] 崔二光 许明峰[2] 

机构地区：[1]河南省锅炉压力容器安全检测研究院,郑州450016 [2]国网河南省电力公司电力科学研究院,郑州450052

出　　处：《动力工程学报》2015年第10期781-785,共5页Journal of Chinese Society of Power Engineering

基　　金：国家质检总局科技计划资助项目(2012QK127)

摘　　要：采用冷态试验和数值模拟方法研究了前后墙对冲旋流燃烧锅炉炉膛结渣的形成原因,通过现场检查和焦渣形貌观察确定了炉膛结渣的部位主要在燃烧器周边区域.冷态试验结果表明燃烧器出口气流发散是炉膛结渣的主要原因,数值模拟结果进一步表明燃烧器扩锥角度偏大导致了燃烧器出口气流的发散,在燃烧器出口新增加扩锥以减小扩锥角度可以预防结渣,改造后锅炉结渣明显减轻,机组运行安全性显著提高.Cold tests and numerical simulation were conducted to study the causes leading to slagging in an opposite firing boiler with swirl burners, which was found to be formed mainly in the area surrounding the burners through site and macro-morphology inspection, and was subsequently found to be caused by outlet airflow divergence through cold tests. Simulation results proved the outlet airflow divergence to be resul- ted from large cone expansion angle, which could be solved by adding a new cone to reduce the angle. By taking appropriate countermeasures, the boiler slagging is obviously alleviated and the safety of unit operation is remarkably improved.

关 键 词：前后墙对冲旋流燃烧锅炉 结渣 改造 冷态试验 数值模拟 

分 类 号：TK227[动力工程及工程热物理—动力机械及工程]