旋流对冲燃烧锅炉中常采用分级送风来实现低NOx燃烧，会造成炉膛内O2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NOx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 NOx 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 NOx 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.

TK224.1

国家自然科学基金（51376161）