基于SNCR和分级燃烧技术的分解炉脱硝数值模拟研究  

Numerical Simulation of Denitration of Calciner Based on SNCR and Staged Combustion Technology

作　　者：陈作炳[1] 沈伟强 陈响 CHEN Zuobing;SHEN Weiqiang;CHEN Xiang(School of Mechanical and Electronic Engineering,Wuhan University of Technology,Wuhan 430070,China;Suzhou Sinoma Construction Co.Ltd.,Kunshan 215300,China)

机构地区：[1]武汉理工大学机电工程学院,湖北武汉430070 [2]苏州中材建设有限公司,江苏昆山215300

出　　处：《数字制造科学》2020年第4期289-293,共5页

摘　　要：以某6000 t/d的NST型分解炉为研究对象,通过建立该类型分解炉的物理数学模型,进而对其内部流场、温度场、NOx生成特性进行了模拟研究,提出了一种新的脱硝方案。研究表明,由于煤粉在主燃烧室附近被喷入的浓度较高,燃烧后会在其内形成大量NOx,且其生成浓度与煤粉用量成正比,随着气固两相流向上流动,所产生的氮氧化物在流动的带动及扩散作用下会较均匀的分布在分解炉内。数字模拟的结果表明,综合SNCR技术和分级燃烧技术的优点后,分解炉脱硝的效果得到很好的提升,为分解炉的脱硝工艺提供了一个新的理论参考。This paper focuses on a 6000 t/d NST type calciner.A physical-mathematical model of the calciner is established.Flow field,temperature field,and NOx generation characteristics are simulated.A new denitration scheme is proposed.Due to the high concentration of pulverized coal injected near the main combustion chamber,a large amountof NOx will be formed in it after combustion,thereby resulting in the fact that concentration is proportional to the amount of pulverized coal.With the upwards flow of the gas-solid two-phase stream,the generated nitrogen oxides will be evenly distributed in the calciner because of flow and diffusion.The result of digital simulation shows that the denitration of calciner has been distinctly improved after combining the advantages of SNCR technology and staged combustion technology.It provides a new theoretical reference for the denitration process of the calciner.

关 键 词：SNCR 分级燃烧 分解炉 数值模拟 NOX脱除 

分 类 号：X781.5[环境科学与工程—环境工程]