摘要
根据垃圾烟气脱酸系统优化的需要,使用计算流体力学的方法建立了垃圾焚烧电厂喷雾干燥脱酸系统的数值计算模型,通过联合求解烟气动量、能量、湍流和组分方程,浆滴运动方程,浆滴蒸发和脱酸模型,得到了脱硫效率和脱氯效率模型。利用该模型计算得出了脱硫率和脱氯率随入口污染物浓度、烟气流速、石灰浆浓度、化学计量比的变化曲线,以及沿反应塔高度的变化曲线,并与实验结果进行了对比。结果表明:该模型能够预测脱硫率和脱氯率随各参数的变化趋势,且计算值与实验值吻合较好,模型误差在5%以内。该模型为垃圾烟气脱酸系统的参数调整提供了参考。
For optimizing the flue gas cleaning systems, a model was developed by computational fluid dynamics to simulate the flue gas cleaning by the spray dryer of a waste incineration power plant. In this model, the momentum, energy, turbulence and composition equations of flue gas, the momentum equation of slurry droplets, and evaporation and cleaning models of droplets were solved together. The efficiencies of desulp- hurization and dechlorination were obtained. The effect of pollutants concentration entering the spray dryer, gas velocity, slurry concentration, and stoichiometric ratio on the removal efficiencies of HCl and SO2 were investigated by this model. The removal profiles of them along the reactor＇s height were presented. And these simulation results were compared with the experimental data. Results show that the model can be used to evaluate the removal efficiencies of HCl and SO2 of the gas cleaning system with an error less than 5% between simulated results and measured values. This model can be referenced in adjusting parameters of the flue gas cleaning system of a waste incineration power plant.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2008年第5期17-22,共6页
Proceedings of the CSEE
关键词
垃圾焚烧
喷雾干燥
计算流体力学
脱硫
脱氯
waste incineration
spray dryer
computational fluid dynamics
desulphurization
dechlofination
