Modelling of gaseous pollutants emissions in circulating fluidized bed combustion of municipal refuse
Modelling of gaseous pollutants emissions in circulating fluidized bed combustion of municipal refuse
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DOI：
10.1016/s0016-2361(98)00060-x
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发表时间：
1998-10-01
期刊：
影响因子：
7.4
通讯作者：
Delfosse, L
中科院分区：
文献类型：
--
作者：
Desroches-Ducarne, E;Dolignier, JC;Delfosse, L
本文对城市生活垃圾在循环流化床燃烧器中焚烧过程中气态污染物（CO、NO、N_2O、SO_2、HCl）的生成和破坏进行了模拟研究。为了描述轴向空隙率分布，使用计算床层密度作为床层高度的指数函数的模型。床层被分为底部的气体和固体完全混合的稠密区和上面的被认为是活塞流的稀区。该模型包括废物颗粒的脱挥发分，焦炭和挥发性物质的燃烧，酸性气体回收钙，NO和N2O的形成和还原均相和非均相反应。研究了不同操作参数（温度、过量空气、钙添加、废物水分和空气分级）的影响，并将计算结果与10 cm i. d的CFB中试装置上测量的排放物进行了比较。4米的高度。预测结果与实验数据吻合较好。(C)1998爱思唯尔科技有限公司版权所有。
This paper presents a modelling study of gaseous pollutants (CO, NO, N2O, SO2, HCl) formation and destruction during the incineration of municipal solid waste in a circulating fluidized bed combustor. To describe axial voidage profiles, a model which calculates the bed density as an exponential function of the bed height is used. The bed is divided into a dense region at the bottom where gas and solids are perfectly mixed and a dilute zone above considered as a plug flow. The model includes devolatilization of waste particles, combustion of char and volatile matters, acid gas recapturing by calcium, NO and N2O formation and reduction by homogeneous and heterogeneous reactions. The impact of different operating parameters (temperature, excess air, calcium addition, waste moisture and air stagement) was studied and the results of calculations were compared with the emissions measured on a CFB pilot plant of 10 cm i.d. and 4 m height. The predictions are in good agreement with experimental data. (C) 1998 Elsevier Science Ltd. All rights reserved.