【大型锅炉NOx生成机理及燃烧器火焰脱硝数值模拟的研究】朱全利.pdf

Dissertation SubmittedtotheDegreeEvaluatingCommitteeof HuazhongUniversityofScienceandTechnology for theDegreeofDoctorofPhilosophyinEngineering Research of Mechanisms of Nitrogen OxideFormation in Pulverized coal Flames and Numerical Simulation of LowNOxPulverizedcoalCombustioninLarge-scaleBoiler B

华中理工大学博士学位论文本文还对旋流煤粉燃烧器火焰脱硝机理进行了分析研究,并对-台双调风旋流燃烧器锅炉火焰脱硝进行了数值模拟。研究了旋流强度、径向浓淡比和采用OFA对炉内燃烧过程以及NOx生成特性的影响规律.最后,本文在一台300M燃用贫煤锅炉上进行了NOx排放特性的试验研究。在实炉上,研究了影响煤粉燃烧过程中NOx排放特性的主要因素。研究表明,过剩空气系数变化时对NOx生成量的影响较人:当OFA的风量增加和上摆时,NOx排放量降低而飞灰可燃物含量增加。另外,煤粉量分配采用下多上少时NOx排放量减少。

华中理工大学博士学位论文 The NOx emission characteristics of a wall-fired boiler were studiedyet.The flow and NOx emissions ofa300Mw boiler with duel-air register swirl burnershave been simulated.The effects of swirl number.radial dense-dilute concentration ratio as well as OFA and its position on NOx eimissio