【摘要】 以内蒙古某660 MW超超临界燃褐煤机组为研究对象，开展了国内首例大型煤电掺烧牛粪试验。试验选用压块牛粪和粉末牛粪与褐煤掺烧，评估了磨煤机对褐煤-牛峰混合燃料的适应性，分析了掺混压块牛粪对制粉性能的影响；研究了不同负荷时，多台磨煤机掺烧压块牛粪对燃烧特性、飞灰可燃物及污染物排放的影响规律。结果表明：制粉系统兼容性较好，磨煤机可耐受≤20%的掺烧比例，单台磨煤机掺烧15%时给煤量不能超过70 t/h，掺烧20%时不能超过60 t/h。燃烧性能良好，单台磨煤机掺烧排烟温度提高1℃～2.5℃，多台磨煤机掺烧提高3.2℃～3.6℃，炉渣未检测到残余碳，飞灰含碳量增幅<0.12%。降碳减污效果显著，掺烧后NOx、SO₂减排幅度达8.5%，在450 MW负荷下NOx排放浓度最高可降32.49 mg/m³，在550 MW负荷下SO₂排放浓度最高可降307.5 mg/m³。牛粪掺烧技术在该机组上展现出良好的综合效能，为燃煤机组降碳及牛粪资源化利用提供了参考。更多还原

【Abstract】 This study conducted China’s first large-scale trial of cattle manure co-firing in a 660 MW ultrasupercritical lignite-fired boiler in Inner Mongolia. Two forms of cattle manure（briquettes and powder） were tested. The coal mill’s grinding capability for biomass-coal mixtures was evaluated, and the impacts of briquette co-firing on pulverizing performance were analyzed. Under varying loads, multi-mill co-firing effects on combustion characteristics, fly ash combustibles, and pollutant discharge was investigated. Results show:The pulverizing system exhibited good compatibility, tolerating ≤20% co-firing ratio. Single-mill co-firing at 15% required coal feed rates <70 t/h, while 20% required <60 t/h. Combustion performance remained stable: flue gas temperature increased by 1-2.5℃（single mill） or 3.2-3.6℃（multi-mill）; slag carbon content stayed at 0%, with fly ash carbon increase <0.12%. Significant decarbonization and emission reduction: NOx/SO₂ decreased by 8.5%, with peak reductions of 32.49 mg/m³（NOx at 450 MW） and 307.5 mg/m³（SO₂ at550 MW）. The cattle manure co-firing technology demonstrates robust performance, offering a viable pathway for coal power decarbonization and manure valorization.更多还原