365 / 2018-12-05 19:28:43

Experimental Study on Sludge Co-Combustion in a Coal-fired Power Plant/燃煤电站锅炉耦合污泥焚烧的试验研究

Pulverized coal fired boiler； Sludge blending； Combustion characteristic； Flue gas pollutants/煤粉炉；污泥掺烧；燃烧特性；烟气污染物

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Based on a co-combustion project with sewage sludge in a 300MW coal-fired power plant in southern China, an experiment study focused on the influence of sludge blending on coal-fired boiler units was conducted. The influences of mixed fuel on the operation of the coal-fired boiler were studied by analyzing the combustion characteristics, combustion conditions and flue gas emissions of dry sludge with different moisture content. The results show that when the sludge is dried to 30% moisture content and the mixing ratio is less 2%, the theoretical furnace combustion temperature decreases by only 1.63 ℃ and the theoretical flue gas flow increases by 0.08%. Compared with the designed coal, the concentration of SO2 in the flue gas increased by 2.11% after incineration, while the pollutants in the tail gas passed through the tail gas purification system were far below the emission limits, which had no significant impact on the actual operation of coal-fired boilers.
针对某南方电厂300MW燃煤锅炉耦合干化污泥焚烧处置工程，对污泥掺烧对燃煤锅炉机组的影响进行试验研究。通过分析不同含水率下干化污泥掺烧后燃烧特性、燃烧工况和烟气排放等变化特性，研究混合燃料对原煤粉锅炉运行的影响。结果表明，在污泥干化到含水率为30%、掺烧比例小于2%时，理论炉膛燃烧温度仅下降1.63℃，理论烟气流量增加0.08%。相比于设计煤种，焚烧后烟气SO2浓度增加2.11%，而尾气中污染物经过电厂的尾气净化系统后远低于排放限值，对燃煤锅炉的实际运行无明显影响。