【摘要】 采用CFD仿真模拟技术,对高温袋式除尘联合SCR脱硝的不同组合结构形式进行内部烟气流动和混合过程进行仿真模拟和优化,根据速度云图、压力云图和流线图等综合分析,结合成熟的电除尘结构及蜂窝催化剂设计计算;设计了高温电袋除尘联合SCR脱硝一体化装备,并在1200 t/d水泥窑尾烟气治理项目上进行工程化应用。结果表明:NOx排放浓度稳定<30 mg/Nm~3,脱硝效率达到97%以上、氨逃逸浓度<2.5 mg/Nm~3、一体化装备进出口总差压<1300Pa,袋区压差稳定在900 Pa,氨水耗量由0.8 m~3/h降低至0.2 m~3/h,对比新增一体化装备前后的生产成本,每吨水泥熟料产量综合运行成本节省4.9元,年综合运营成本节省215万元。在解决环保问题的同时,还带来了一定的经济效益。研究成果为水泥行业烟气多污染物治理技术路线升级提供了重要技术支撑和参考。更多还原

【Abstract】 CFD simulation technology is used to simulate and optimize the internal flue gas flow and mixing process of different combinations of high-temperature bag filter combined with SCR denitrification. Combined with the mature electrostatic precipitator structure and honeycomb catalyst design and calculation. the integrated equipment of high temperature electrostaticfabric dust removal combined with SCR denitrification was designed, and the engineering application was carried out in the 1200t/d cement kiln tail gas treatment project. The results showed that the NOxemission concentration was stable and below 30 mg/Nm~3, the denitrification efficiency was above 97%, the ammonia escape concentration was below 2. 5 mg/Nm~3, the total differential pressure at the inlet and outlet of the integrated equipment was less than 1300 Pa, and the differential pressure in the bag area was stable at 900 Pa. Ammonia consumption decreased from 0. 8 m~3/h to 0. 2 m~3/h. Compared with the production cost before and after the addition of integrated equipment, the comprehensive operating cost of cement clinker output was saved 4. 9 yuan per ton, and the annual comprehensive operating cost was saved 2. 15 million yuan. While solving the problem of environmental protection, it also brings some economic benefits. The research results have provided important technical support and reference for the upgrading of the flue gas multi-pollutant control technology route in the cement industry.更多还原