330 MW循环流化床锅炉低氮燃烧改造

Low NO_x Combustion Transformation for a 330 MW CFB Boiler

分析了330 MW级循环流化床锅炉氨水耗量大、成本高的原因,针对性地提出了低氮燃烧改造方案,包括加强配煤掺烧、分离器提效改造、布风板阻力优化改造等,改造后各负荷下床温、床温偏差、分离器入口烟温、氨水耗量几项主要指标均有明显改善,实现了降低氨水成本的目标,给同类型机组低氮燃烧改造提供了较好的借鉴。

Firstly, the reasons of high aqueous ammonia consumption and high cost of 330 MW CFB boiler were analyzed,then the transfornation scheme for low NOxcombustion was proposed,including strengthening the co-combustion of blended coal, improving the efficiency of the separator, and optimizing the air distributor. The main indexes, including the bed temperature, the bed temperature deviation, the smoke temperature at the separator inlet and the aqueous ammonia consumption were obviously improved after the transformation. The goal of reducing the cost of ammonia water was thus achieved, which provides good references for the low NOx combustion transformation of the same type unit.