中文摘要：

某新建活性焦联合脱硫脱硝脱汞反应塔在试运行过程中运行阻力大,且脱硫脱硝效率较低。为提升反应塔的性能,以原设备为几何模型,采用CFD方法进行模拟优化。针对影响设备压降和脱硫性能的入口气流均匀性问题,模拟对比了4种导流板方案,考察板间距和圆弧板半径对气流均布的影响。同时为提高喷氨均匀性,结合烟气在过渡气室的流动情况提出了2种喷氨格栅加密方案。模拟结果表明：板间距和圆弧板半径都相同的导流板方案均布气流的效果最好,烟气在活性焦脱硫层的气流均匀性提升了11.48%,同时设备的压降降低了451 Pa。合理的喷氨格栅加密方案使氨气分布均匀性提升了34.88%。反应塔的压降模拟结果与现场实测数据吻合较好,模拟结果对设备的优化设计和实际运行有指导作用。

英文摘要：

One integrated desulfurization and denitrification tower filled with activated coke experienced issues involving high pressure loss and low desulfurization and denitrification efficiencies during a trial operation period. In order to improve the performance of this system, an industrial prototype of the tower was developed and opti- mized conditions were assessed by using the CFD method in this work. Four types of guide plates with different plate distances and arc plates were simulated for the optimization work, which focused on the velocity distribution in the entrance area. Meanwhile, more dense and reasonable arrangements of the ammonia injection grids were studied in an attempt to improve the uniformity of the ammonia distribution. The simulated results indicated that the guide plate with the same plate distance and arc plate were superior to other layouts. The velocity uniformity was improved by 11.48% , and the total pressure loss decreased by 451 Pa. The optimized ammonia injection grid increased the uniformity of the ammonia distribution by 34. 88%. The simulation results for the pressure loss agreed well with the industrial measurements. This study may shed light on ways to improve the operation of inte- grated desulfurization and denitrification towers, which represent promising prospects for industrial applications.