摘要
选择性催化还原(SCR)烟气脱硝技术虽然应用广泛,但催化剂磨损、堵塞及还原剂与烟气混合不均等问题时有发生,CFD技术可多角度模拟现场情况,有助于问题的解决。对国内外燃煤电站SCR烟气脱硝CFD技术的研究进行了综述,在对文献进行梳理的基础上,阐述了计算流体力学CFD软件在SCR烟气脱硝模拟中的应用情况,其主要领域包括:流场模拟、组分浓度场模拟、气固两相流模拟、化学反应模拟等。指出合理均匀的流场是整个SCR系统经济安全运行的基础;耦合详细反应机理的SCR模型与锅炉燃烧、SNCR等模型的联合模拟是未来研究的重点。
Although the selective catalytic reduction （SCR） flue gas denitrification technology has been widely used, some problems still keep happening occasionally such as the wearing and the blockage of the catalyst, the uneven mixing of reducing agent with flue gas, etc. With the CFD technology the scenarios from multiple differentaspects can be simulated, which is helpful to resolve these problems. In this paper, the literatures on the progress of CFD-based SCR flue gas denitrification technology are summarized. On the basis of sorting out the literatures, the application of computational fluid dynamics CFD software in the simulation of SCR flue gas denitrification is expounded, which mainly includes the simulations of flow field,concentration field, gas-solid two-phase flow and chemical reactions. It is concluded that reasonable and uniform flow fields are the essential to the economic and security operation of the whole SCR system. The integrated simulations of SCR model coupled with detailed reaction kinetics model, furnace combustion model combined with SNCR model will capture more attention in the future studies.
出处
《中国电力》
CSCD
北大核心
2016年第8期157-161,共5页
Electric Power
关键词
燃煤电站
烟气脱硝
选择性催化还原
数值模拟
coal fired power plant
flue gas denitrification
SCR
numerical simulation
