锅炉低负荷工况下脱硝系统投运率提高的改造技术

对通过分级省煤器改造来提高超临界锅炉低负荷工况下脱硝系统投运率的改造案例进行了研究。通过持续2个月的运行监控表明，运用分级省煤器改造来保证低负荷工况下NOx的持续超低排放、脱硝系统的安全稳定投运方案切实可行，且锅炉排烟温度进一步降低，为目前国内众多采用SCR工艺进行烟气脱硝的电厂升级改造提供了可靠的参考依据。

Retrofit for SCR Equipment Operation Rate Improvement under Low Load Conditions on 600-MW Supercritical Boiler

In this paper, the case study is conducted on the first economizer retrofit project which is for the improvement of the SCR equipment operation rate under low load conditions on a supercritical boiler. The continuous two-month operation monitoring shows that the project is feasible in ensuring the SCR operation rate under low load conditions, and furthering lowering the exhaust gas temperature at the same time. The project provides a reliable reference for upgrading the SCR denitrification equipments in other power plants.