300 MW循环流化床锅炉SNCR脱硝仿真模拟  

Simulation of SNCR Denitrification in a 300 MW Circulating Fluidized Bed Boiler

作　　者：高贵君 罗红玉 GAO Guijun;LUO Hongyu(Guojiawan Power Plant,Shenhua Shendong Electric Power Co.,Ltd.,Yulin 719300,China;Beijing Xinye Technology Co.,Ltd.,Beijing 100080,China)

机构地区：[1]神华神东电力有限责任公司郭家湾电厂,陕西榆林719300 [2]北京新叶科技有限公司,北京100080

出　　处：《科技创新与生产力》2025年第1期87-91,共5页Sci-tech Innovation and Productivity

摘　　要：针对某300 MW循环流化床锅炉SNCR脱硝过程进行CFD仿真模拟,获得了锅炉出口到旋风分离器出口的速度和氨浓度分布及变化规律。结果显示:烟气进入旋风分离器后被快速加速,最高速度达110 m/s,并呈中心区速度低、靠近壁面区速度高的趋势;尿素溶液经喷枪喷入烟道后,快速蒸发为氨气,并在整个旋风分离器内迅速扩散。随着喷射速度的增加,整个反应区内的氨浓度增加,当喷射速度从60 m/s增加至90 m/s的过程中,氨浓度分布规律发生变化。CFD simulation is conducted on the SNCR denitrification process of a 300 MW circulating fluidized bed boiler,and the velocity and ammonia concentration distribution and variation patterns from the boiler outlet to the cyclone separator outlet are obtained.The results show that after entering the cyclone separator,the flue gas is rapidly accelerated,with a maximum velocity of 110 m/s and a trend of low velocity in the central area and high velocity near the wall area;after the urea solution is sprayed into the flue through a spray gun,it quickly evaporates into ammonia gas and diffuses rapidly in the cyclone separator.As the injection velocity increases,the ammonia concentration in the entire reaction zone increases.When the injection velocity increases from 60 m/s to 90 m/s,the distribution pattern of ammonia concentration changes.

关 键 词：循环流化床锅炉 SNCR脱硝 仿真模拟 流速 氨浓度 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]