分布式能源2026，Vol.11Issue(3)：14-22,9.DOI:10.16513/j.2096-2185.DE.26110061
无烟煤中低负荷燃烧结渣特性及成分演化的实验研究
Experimental Study on Slagging Characteristics and Composition Evolution of Anthracite Coal at Low to Medium Loads
摘要
Abstract
This study investigates the ash deposition behavior of anthracite during combustion,which significantly affects boiler safety and efficiency due to slagging tendencies.A pilot-scale one-dimensional settling furnace system was employed to conduct combustion experiments under varied operating conditions,including different loads,primary/secondary air ratios,and excess air coefficients.Ash samples were analyzed by fusion tests,scanning electron microscope(SEM),X-ray diffraction(XRD),X-ray fluorescence spectroscop(XRF),and laser sizing.Results show ash composition(C,O,Si,Al)and crystalline phases(quartz,mullite,hematite)remain stable.Increasing the load from 0.2 MW to 0.3 MW raises the ash deformation temperature from 1 259℃to 1 312℃,while the slagging index increases from 1 268 to 1 319,indicating a significantly enhanced slagging tendency.When the mass ratio of primary air to secondary air is increased from 2/8 to 4/6,the unburned carbon content in ash increases from approximately 37.5%to 40%,and the median particle size enlarges from 22 μm to about 28 μm,resulting in a pronounced promotion of ash deposition.Excess air coefficient had limited impact on fusibility and slagging.Ash exhibited a bimodal size distribution:fine particles form an adhesive layer,while coarse particles deposit by impaction,jointly accelerating slagging.The results demonstrate that boiler load dominates slagging behavior,with air distribution affecting burnout and particle characteristics.This study provides pilot-scale experimental data and mechanistic insights for slagging prediction and combustion optimization of anthracite-fired boilers under wide-load operation.关键词
无烟煤燃烧/一维沉降炉中试实验/灰渣特性/矿物转化/结渣倾向Key words
anthracite coal combustion/one-dimensional settling furnace pilot-scale experiment/ash characteristics/mineral transformation/slagging tendency分类
能源科技引用本文复制引用
葛文韬,陈猛,王晨宇,穆林,东明,王储..无烟煤中低负荷燃烧结渣特性及成分演化的实验研究[J].分布式能源,2026,11(3):14-22,9.基金项目
国家重点研发计划项目(2024YFB4104801) （2024YFB4104801）
国家自然科学基金项目(52306283) （52306283）
中央高校基本科研业务费资助项目(DUT24RC(3)073) This work is supported by National Key Research and Development Program of China(No.2024YFB4104801),National Natural Science Foundation of China(No.52306283),and Fundamental Research Funds for the Central Universities(No.DUT24RC(3)073). （DUT24RC(3）
