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首页> 外文会议>European Conference on Industrial Furnace and Boilers >Deriving guidelines for the design of biomass grate furnaces with CFD analysis - a new Multifuel-Low-NO_x furnace as example
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Deriving guidelines for the design of biomass grate furnaces with CFD analysis - a new Multifuel-Low-NO_x furnace as example

机译：通过CFD分析推导生物量炉炉设计指南 - 一种新的多型低No_X炉作为示例

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摘要

IN the present work, guidelines for the design of grate furnaces in the typical size range of Austrian district heating plants (0.5 - 10.0 MW_(th)) were derived from CFD analysis. For this purpose, a case study systematically investigating all important parameters for a successful design of a Low-NO_x furnace was performed. The simulation of solid biomass combustion on the grate and turbulent-reactive flow in the combustion chamber was performed via forward coupling. An empirical model was applied for thermal decomposition of the solid fuel. The calculation results were used as boundary profiles for subsequent CFD simulations of the turbulent reactive flow in the furnace. CFD modelling was based on the Realizable k-e Model (turbulence), the Discrete Ordinates Model (radiation) and the Eddy Dissipation ' Model (turbulent combustion) in combination with a global 3-step reaction mechanism considering the species-CHU, CO, CO_2, H_2, H_2O and O_2. NO_X formation and reduction were not considered explicitly with a CFD postprocessor. The furnace was designed under Low-NO_X aspects, i. e., with air staging technology and a temperature controlled primary combustion zone obtained by flue gas recirculation.
机译：在目前的工作中，源自CFD分析衍生出奥地利区供热厂典型尺寸范围内的炉排炉（0.5-10.0mW_（Th））的设计指南。为此目的，进行了系统地研究成功设计低No_X炉的所有重要参数的案例研究。通过前耦合进行燃烧室中的炉排和湍流反应流的固体生物量燃烧的模拟。应用实证模型用于固体燃料的热分解。计算结果用作炉中湍流反应流动的后续CFD模拟的边界轮廓。 CFD建模基于可实现的KE模型（湍流），离散坐标模型（辐射）和涡流耗散的模型（湍流燃烧）与考虑到楚，CO，CO_2，CO，CO_2， H_2，H_2O和O_2。 NO_X形成和减少未明确地与CFD后处理器明确考虑。炉子在低NO_X方面设计，I。即，随着空气分期技术和通过烟气再循环获得的温度控制的初级燃烧区。

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