电厂锅炉优化改造试验分析
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摘要
为进一步提高锅炉效率,减少锅炉污染物排放,以某电厂锅炉为研究对象,对锅炉的空预器密封装置、水平烟道吹灰系统以及高压省煤器进行等进行整体优化,对锅炉进行化学清洗和保温处理,通过试验对优化前后对锅炉热效率及污染物排放进行对比。结果表明:与改造前相比,不同负荷下锅炉效率平均提高2.3%,同时供电煤耗降低;锅炉排烟温度降低,干烟气热损失减少;未燃尽率碳热损失及空预器漏风率也大幅降低,锅炉排放NOx浓度达到排放要求。此次优化改造达到了预期效果。
In order to improve boiler efficiency and reduce the emission of boiler pollutants, this paper take a power plant as the research object, the overall optimization of the boiler's air preheater seal device horizontal flue ash blower system and high-pressure economizer.were carried out, chemical cleaning and heat treatment were also carried out for bolier, and the thermal efficiency and pollutant discharge of the boiler ware tested before and after the optimization. Compared with that before the optimization, the efficiency of boiler is increased by 2.3% under different loads and the coal consumption is reduced at the same time. The unburned carbon heat loss and the air leakage rate of air preheater is also greatly reduced. The concentration of NOxdischarged from the boiler has reached the requirement. The optimized reform has achieved the expected effect.
In order to improve boiler efficiency and reduce the emission of boiler pollutants, this paper take a power plant as the research object, the overall optimization of the boiler's air preheater seal device horizontal flue ash blower system and high-pressure economizer.were carried out, chemical cleaning and heat treatment were also carried out for bolier, and the thermal efficiency and pollutant discharge of the boiler ware tested before and after the optimization. Compared with that before the optimization, the efficiency of boiler is increased by 2.3% under different loads and the coal consumption is reduced at the same time. The unburned carbon heat loss and the air leakage rate of air preheater is also greatly reduced. The concentration of NOxdischarged from the boiler has reached the requirement. The optimized reform has achieved the expected effect.
引文
[1]应明良,戴成峰,胡伟锋,等.600MW机组对冲燃烧锅炉低氮燃烧改造及运行调整[J].中国电力,2011,44(4):55-58.
[2]高继录,冷杰,许华,等.1000 MW机组干式排渣系统对锅炉效率影响的试验研究[J].热能动力工程,2012,27(5):578-581.
[3]焦同帅,阎维平,曹颖,等.CFB锅炉散热损失测算及估算对锅炉效率的影响研究[J].热力发电,2016,44(12):45-49.
[4]张国光,姜英.锅炉各种热损失对锅炉效率的影响程度分析[J].煤质技术,2009(4):46-49.
[5]王学栋,栾涛,程林,等.锅炉燃烧调整对NOx排放和锅炉效率影响的试验研究[J].动力工程,2008,28(1):19-23.
[6]李建锋,李斌,朱超,等.600 MW超临界火力发电机组锅炉能效诊断[J].锅炉技术,2013,44(4):14-18.
[7]韩义,贾瑞婷,蔡斌,等.330 MW级对冲燃煤锅炉不同低氮燃烧改造方案的效果分析[J].电站系统工程,2016,32(6):31-34.
[2]高继录,冷杰,许华,等.1000 MW机组干式排渣系统对锅炉效率影响的试验研究[J].热能动力工程,2012,27(5):578-581.
[3]焦同帅,阎维平,曹颖,等.CFB锅炉散热损失测算及估算对锅炉效率的影响研究[J].热力发电,2016,44(12):45-49.
[4]张国光,姜英.锅炉各种热损失对锅炉效率的影响程度分析[J].煤质技术,2009(4):46-49.
[5]王学栋,栾涛,程林,等.锅炉燃烧调整对NOx排放和锅炉效率影响的试验研究[J].动力工程,2008,28(1):19-23.
[6]李建锋,李斌,朱超,等.600 MW超临界火力发电机组锅炉能效诊断[J].锅炉技术,2013,44(4):14-18.
[7]韩义,贾瑞婷,蔡斌,等.330 MW级对冲燃煤锅炉不同低氮燃烧改造方案的效果分析[J].电站系统工程,2016,32(6):31-34.