330MW机组燃用神华煤优化改造

Equipment optimization for burning Shenhua coal in a 330 MW coal-fired unit

天津国电津能热电有限公司2×330 MW机组锅炉在掺烧神华煤过程中出现了严重结渣现象,为此电厂对燃用神华煤的2号锅炉燃烧系统进行了重新设计和调整,并在易结渣区域增加了26支吹灰器。优化改造后,锅炉结渣明显改善,空气预热器入口烟气温度降低11℃;飞灰含碳量和CO生成量基本不变,SCR装置入口NOx生成质量浓度降低30 mg/m^(3),锅炉效率升高0.3%,停炉检查发现炉膛区域和屏区结渣明显减轻。

Serious slagging occurred in 2×330 MW unit boilers of Tianjin Guodian Jinneng Thermal Power Plant when burning Shenhua coal.To solve this problem,the power plant redesigned and adjusted the combustion system of No.2 boiler,and added 26 steam soot-blowers in the slagging area.After the optimization,the slagging situation was dramatically eased,the flue gas temperature at inlet of the air preheater decreased by 11℃,the carbon content in fly ash and quantity of CO produced had little change basically,the mass concentration of NOx at the SCR denitration system inlet decreased by 30 mg/m^(3),and the boiler efficiency increased by 0.3%.It was found that the slagging in the furnace area and the platen area was significantly reduced after boiler shutdown.