摘要
以内蒙古某660MW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、SO_(2)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/m^(3),在550 MW负荷下SO_(2)排放浓度最高可降307.5 mg/m^(3)。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。
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/SO_(2)decreased by 8.5%,with peak reductions of 32.49 mg/m^(3)(NOx at 450 MW)and 307.5 mg/m^(3)(SO_(2)at 550 MW).The cattle manure co-firing technology demonstrates robust performance,offering a viable pathway for coal power decarbonization and manure valorization.
作者
卫翔
潘腾
田亚钊
律景春
杨富鑫
WEI Xiang;PAN Teng;TIAN Yazhao;LV Jingchun;YANG Fuxin(CHN Energy Beidian Shengli Energy Co.,Ltd.,Xilinhot,Inner Mongolia 026000;The School of Energy and Power Engineering of Xi'an Jiaotong University,Xi'an,Shaanxi 710000)
出处
《能源科技》
2025年第4期48-52,共5页
Energy Science and Technology
基金
国家能源集团科技创新项目(GDDL-24-31)。
关键词
超超临界
褐煤
牛粪
掺烧
燃烧特性
污染物排放
ultra-supercritical
lignite
cattle manure
co-firing
combustion characteristics
pollutant dis-charge
