摘要
燃煤发电在我国造成的环境压力日渐凸显,SCR作为脱硝效率最理想的烟气脱硝方法而被火电厂普遍采用。利用数值模拟的方法对某300MW燃煤锅炉配套的SCR脱硝系统进行导/混流结构优化研究。结果表明,导/混流优化后的方案与原始方案相比,能使反应器首层催化剂入口的烟气速率分布、浓度分布的相对标准偏差分别降至8.66%、4.54%,烟气入射角±7°,均达到工程要求;可为燃煤锅炉SCR脱硝系统设计及优化提供参考依据。
By using the numerical simulation method, the paper makes a study on diversion/mixed-fow structure opti-mization in SCR denitration system formed by a certain 300MW coal-fred boiler. The result shows that in comparison of diver-sion/mixed-fow optimization program with the original program, the speed distribution of fue gas in the catalyzer inlet of the reactor and the relative standard deviation of concentration distribution reduce respectively 8.66% and 4.54%, and an angle±7° of incidence of fue gas meets the engineering requirement. It can provide references for the design and optimization of SCR denitration system in coal-fred boiler.
出处
《中国环保产业》
2017年第11期58-64,共7页
China Environmental Protection Industry
关键词
烟气脱硝
SCR法
数值模拟
结构优化
fue gas denitration
SCR process
numerical simulation
structure optimization
