热力发电2025，Vol.54Issue(4)：61-67,7.DOI:10.19666/j.rlfd.202408185
掺烧煤矸石对减轻生物质燃烧结渣性能的影响
Effect of coal gangue blending on mitigating slagging performance of biomass combustion
摘要
Abstract
Biomass contains a high content of alkali metal elements,which can cause serious slagging problems during the combustion process.Coal gangue is a kind of bulk solid waste,and its resource utilization is an urgent need.In order to solve the problem of biomass combustion slagging and coal gangue utilization,coal gangue was used as an additive and mixed with sunflower straw for combustion.Physical and chemical characterization of the burned ash samples were carried out using thermogravimetric analysis(TG-DTG),inductively coupled plasma spectrometry(ICP-AES),and ash melting point tester.The effects of temperature and ratio on the combustion performance and slagging of mixed fuels were also investigated.The research results show that,during the combustion of sunflower straw,the addition of a small amount of gangue significantly increased the alkali metal content in the ash.More of these metals were converted into high-melting-point silica-aluminates,which were fixed in the ash samples,while the gaseous alkali metal content decreased.As a result,the tendency for slagging during combustion was reduced.At the same time,the sunflower straw reduced the ignition point and burnout temperature of the gangue,thereby promoting its combustion.The synergistic effect was obvious.When the proportion of coal gangue was 20%,the flammability index of the fuel reached 9.36×10-4%/(min·℃),and the comprehensive combustion characteristics index reached 42.6×10-7%/(min2·℃3).The combustion performance was optimal,with a softening temperature of 1 470℃,and the tendency for slagging was significantly reduced.关键词
葵花秸秆/煤矸石/混合燃烧/结渣/熔融特性Key words
sunflower straw/coal gangue/co-combustion/slagging/melting characteristics引用本文复制引用
朱愉洁,韩元,柳少卿,贾相如..掺烧煤矸石对减轻生物质燃烧结渣性能的影响[J].热力发电,2025,54(4):61-67,7.基金项目
内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司2023年院自筹(一批)科技项目(2023-ZC-11) Inner Mongolia Power(Group)Co.,Ltd.Inner Mongolia Power Research Institute Branch 2023 Self-raised(Batch)Science and Technology Project(2023-ZC-11) （集团）
