600MW锅炉掺烧低灰熔点煤燃烧器改造方案研究
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摘要
对影响锅炉结渣及NO_x排放的因素进行了分析,针对某660MW锅炉提出了提高低灰熔点煤掺烧比例和降低NO_x排放浓度的燃烧器优化方案。燃烧器优化方案分为燃烧器小改、大改两种,并对两个方案进行了技术和经济比较,推荐燃烧器小改方案。燃烧器优化改造后,低灰熔点煤的掺烧比例将提高至70%左右,锅炉NO_x排放浓度小于200mg/m~3,提高了煤种适应性,降低了电厂运行成本。
The influencing factors of boiler slagging and NO_x emission were analyzed. A 660 MW boiler burners were optimized to increase the blending ratio of coal with low ash-melting point and decrease the NO_x emission. The burner optimization schemes were divided into two types: the small and large burner retrofit scheme. It was also compared technological and economical feasibility among the two schemes, the small burner retrofit scheme was recommended solution. After the optimization of the burner, the blending ratio of coal with low ash-melting point would increase to about 70%, concentration of boiler NO_x emission was less than 200 mg/m~3, enhancing the coal applicability and reducing the power plant operating costs.
The influencing factors of boiler slagging and NO_x emission were analyzed. A 660 MW boiler burners were optimized to increase the blending ratio of coal with low ash-melting point and decrease the NO_x emission. The burner optimization schemes were divided into two types: the small and large burner retrofit scheme. It was also compared technological and economical feasibility among the two schemes, the small burner retrofit scheme was recommended solution. After the optimization of the burner, the blending ratio of coal with low ash-melting point would increase to about 70%, concentration of boiler NO_x emission was less than 200 mg/m~3, enhancing the coal applicability and reducing the power plant operating costs.
引文
[1]曾汉才.燃烧与污染[M].武汉:华中理工大学出版社,1992.
[2]张建文,吴蓓玲,张维侠,等.锅炉负荷变化对NOx排放浓度的影响[J].发电设备,2010(5):343-346.
[3]李文学,张东杰,黄宣,等.配煤掺烧比对发电厂综合成本影响的定量分析和优化计算[J].电力科技与环保,2016,32(1):50-53.
[4]李泽伯,许利峰,赖积海,等.330MW贫煤锅炉改烧神华煤技术改造及经济性分析[J].电力科技与环保,2017,33(4):58-60.
[2]张建文,吴蓓玲,张维侠,等.锅炉负荷变化对NOx排放浓度的影响[J].发电设备,2010(5):343-346.
[3]李文学,张东杰,黄宣,等.配煤掺烧比对发电厂综合成本影响的定量分析和优化计算[J].电力科技与环保,2016,32(1):50-53.
[4]李泽伯,许利峰,赖积海,等.330MW贫煤锅炉改烧神华煤技术改造及经济性分析[J].电力科技与环保,2017,33(4):58-60.