330 MW燃煤发电机组除尘系统节能优化

Energy-Saving Optimization on the Dust Collection System of a 330 MW Power Plant

燃煤发电机组除尘系统完成超低排放改造后,在保证电除尘器除尘效率的同时,还需对其电耗进行优化。在除尘系统的节能优化中,性能试验不可或缺。以某330 MW燃煤机组除尘系统为例,在100%、75%和50%负荷时,设计了10种工况,给出不同工况时各电场的充电比、火花率、平均二次电压和平均二次电流,最终测试不同工况下电除尘器除尘效率、电耗及厂用电率。研究结果表明:机组高负荷运行时,提高电除尘器前部电场电源参数值可以显著提高除尘效率,而适度提高末电场的电源参数值,可以有效降低粉尘的最终排放浓度。

After the ultra-low emission transformation, it is of great significance to optimize the electricity consumption of dust collection system in coal-fired power plants with the dust emission control still maintained at the certain level simultaneously. Performance testing is an indispensable part of this energy-saving optimization. In this paper, experimental researches on the energy-saving optimization of the dust collection system under 10 operation conditions with different combinations of charging ratio, spark rate, average secondary current and average secondary voltage have been done in a 330 MW coal-fired power plant. It is discovered from the testing results regarding several basic principles of dust collection system optimization that raising parameters of the first field will lead to significantly higher dust collection efficiency, while increasing the parameter values of the last field properly will significantly lower down the final emission concentration.