摘要
某330 MW火电厂的SCR脱硝系统催化剂局部区域磨损严重。经实际调研,发现催化剂磨损较为严重区域位于距离前墙约1m左右处和紧靠后墙处。为探讨其原因,对烟道内烟气流动和飞灰颗粒的分布特征进行数值模拟研究,并以第一层催化剂前烟气速度大小、烟气中灰颗粒的浓度来定量表征含尘烟气对催化剂层磨损的作用情况,模拟结果与实际考察结果有较好的一致性。在进一步对原因分析的基础上提出了初步改进方案建议,为企业SCR脱硝系统的流场优化改造提供了技术支撑。
In the 330 MW thermal power plant, the SCR denitrification system have partially seriously worn problem. By investigating the catalyst wear condition, found that the catalyst located I m from the front wall and near the rear wall wore more seriously. To explore the causes, the flow characteristics of flue gas and fly ash particles are numerically simulated. The catalyst wear situation was quantitatively characterized by the flue gas velocity and the concentration of the ash particles above the first catalyst layer. The simulation results show good agreement with the actual results. Based on the simulation results, this paper puts for- ward some proposals for the preliminary improvement scheme, which provides technical sup- port for the further optimization of the SCR system.
出处
《锅炉技术》
北大核心
2018年第1期10-16,21,共8页
Boiler Technology
基金
山西省科技重大专项资助项目(MD2014-03
MD2015-01)
NSFC-山西省联合基金重点项目(U1610254)
山西省重点研发计划(国际合作)(201603D421041)
