摘要
国内外选择性催化还原(SCR)脱硝系统烟气流场优化仅限于通过数值和物理模拟来优化设计导流板,最终效果参差不齐。根据机组运行期间SCR脱硝系统入口烟气流场均匀性检测结果,机组停运期间脱硝烟道内部检查情况,进行脱硝系统入口氨烟混合扰流发生器的设计及数值模拟,选择最佳的氨烟混合扰流发生器进行安装施工,项目实施后进行喷氨优化调整,实现SCR脱硝系统烟气流场优化,降低脱硝液氨耗量,减少硫酸氢铵的生成,减轻空气预热器的堵塞,减轻脱硝催化剂的磨损和堵塞。为存在此类问题的其他同类型机组电厂解决上述问题提供可借鉴经验和技术支撑。
The optimization for flue gas field of international and domestic SCR denitration systems is limited to the optimizing of deflector design through numerical and physical simulations,and the results are unstable.Based on the uniformity detection for flue gas field at SCR denitration inlet during operation,and the internal inspection for denitration flue duct during shutdown,the design and numerical simulation for ammonia-smoke mixed flow spoiler at denitration inlet were executed,and the optimum flow spoiler was selected and installed.The ammonia injecting adjustment was made after the project,and the flow field of SCR denitration system was optimized.The project reduced the ammonia consumption for denitration and the production of NH 4HSO 4,also alleviate the blockage of air preheaters and the wear and blockage of the denitration catalyst.At the same time,it provides reference and technical support for other similar units in solving the problems above.
作者
林青
LIN Qing(Huadian Xinxiang Power Generation Company Limited,Xinxiang 453635,China)
出处
《华电技术》
CAS
2019年第12期58-62,共5页
HUADIAN TECHNOLOGY
作者简介
林青(1985—),男,河南郑州人,工程师,从事火力发电厂技术管理方面的工作,E-mail:linqing3@chd.com.cn。
