文献类型：期刊文献

英文题名：CFD simulation of MSW combustion and SNCR in a commercial incinerator

作者：Xia, Zihong[1];Li, Jian[1];Wu, Tingting[1];Chen, Caixia[1];Zhang, Xiaoke[2]

机构：[1]E China Univ Sci & Technol, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China;[2]Shanghai Environm Grp Co, Shanghai 200336, Peoples R China

年份：2014

卷号：34

期号：9

起止页码：1609

外文期刊名：WASTE MANAGEMENT

收录：;EI(收录号：20143318056767);WOS:【SCI-EXPANDED(收录号:WOS:000340990900007)】；

基金：This work is supported in part by China's National Science Foundation (NSFC) under grants (21276085, and 20876049), and Science and Technology Commission of Shanghai Municipality (Projects 10DZ1200105, and 13231201901). We acknowledge Ruina Zhang and Shanping Chen from Shanghai Institute for design and research in environmental engineering Co., Ltd. for helpful assistance on the test work presented in Fig. 9.

语种：英文

外文关键词：Municipal solid waste (MSW); SNCR; CFD modeling; Moving-grate incinerator

摘要：A CFD scheme was presented for modeling municipal solid waste (MSW) combustion in a moving-grate incinerator, including the in-bed burning of solid wastes, the out-of-bed burnout of gaseous volatiles, and the selective non-catalytic reduction (SNCR) process between urea (CO(NH2)(2)) and NOx. The in-bed calculations provided 2-D profiles of the gas-solid temperatures and the gas species concentrations along the bed length, which were then used as inlet conditions for the out-of-bed computations. The over-bed simulations provided the profiles of incident radiation heat flux on the top of bed. A 3-dimensional benchmark simulation was conducted with a 750 t/day commercial incinerator using the present coupling scheme incorporating with a reduced SNCR reduction mechanism. Numerical tests were performed to investigate the effects of operating parameters such as injection position, injection speed and the normalized stoichiometric ratio (NSR) on the SNCR performance. The simulation results showed that the distributions of gas velocity, temperature and NOx concentration were highly non-uniform, which made the injection position one of the most sensitive operating parameters influencing the SNCR performance of moving grate incinerators. The simulation results also showed that multi-layer injections were needed to meet the EU2000 standard, and a NSR 1.5 was suggested as a compromise of a satisfactory NOx reduction and reasonable NH3 slip rates. This work provided useful guides to the design and operation of SNCR process in moving-grate incinerators. Published by Elsevier Ltd.