旋流对冲燃烧锅炉整炉膛数值模拟与工程应用研究进展与展望  

Research Progress and Prospects of Numerical Simulation and Engineering Application of the Whole Furnace of Swirl Opposed Combustion Boiler

作　　者：刘鹏宇 李德波 刘彦丰[1] 冯永新 LIU Peng-yu;LI De-bo;LIU Yan-feng;FENG Yong-xin(Department of Power Engineering,North China Electric Power University,Baoding,China,071003;China Southern Grid Power Technology Co.,Ltd.,Guangzhou,China,510080)

机构地区：[1]华北电力大学动力工程系,河北保定071003 [2]南方电网电力科技股份有限公司,广东广州510080

出　　处：《热能动力工程》2022年第3期1-8,共8页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金(51376161)。

摘　　要：旋流对冲燃烧锅炉中常采用分级送风来实现低NO_(x)燃烧,会造成炉膛内O_(2)体积分数减小、还原性气体体积分数增大,极易诱发锅炉水冷壁高温腐蚀现象。为此综述了大型旋流对冲锅炉低NO_(x)燃烧技术所导致的高温腐蚀现象及贴壁风改造数值模拟研究现状,发现目前大型旋流对冲燃烧锅炉数值模拟中普遍存在使用未考虑灰层的焦炭燃烧模型及在全炉膛数值模拟中过度简化旋流燃烧器结构的问题,导致与工程实际的误差难以进一步降低,需要进一步开展单个旋流燃烧器和整炉膛数的值模拟工作,以探索旋流燃烧器内、外二次风旋流强度、风量等多回流区影响的规律和二次风量在主燃烧器区域和燃尽风区域分配对锅炉燃烧及污染物生成的影响规律。The staged air supply is often used in swirl opposed combustion boilers to realize low NO_(x) combustion,resulting in the reduction of O_(2) volume fraction and the increase of reducing gas volume fraction in the furnace,which is very easy to induce high-temperature corrosion of boiler water wall.Therefore,the high-temperature corrosion phenomena caused by low NO_(x) combustion technology of large-scale swirl opposed boiler and the research status of numerical simulation of closing-to-wall air transformation are summarized.It is found that the coke combustion model without considering the ash layer is widely used in the numerical simulation of large swirl opposed combustion boiler,and the structure of swirl burner is excessively simplified in the numerical simulation of the whole furnace,which make it difficult to further reduce the error with the engineering practice.As a result,it is necessary to further carry out the numerical simulation of single swirl burner and whole furnace chamber,so as to explore the influence law of swirl intensity and air volume of secondary air inside and outside the swirl burner on the multi backflow zone and the influence law of secondary air volume distribution in the main burner area and burnout air area on the boiler combustion and pollutant generation.

关 键 词：旋流对冲锅炉 低NO_(x)燃烧 高温腐蚀 贴壁风 燃烧调整 

分 类 号：TK224.1[动力工程及工程热物理—动力机械及工程]