生物质与煤矸石(煤系高岭土)共燃行为及固定碱金属特性研究  

Study on Co-combustion Behaviour of Biomass with Gangue(Coal Kaolin)and Retention Characteristics of Alkali Metals

作　　者：李昊 刘海玉[1] 乔晓磊[1] 谢玉婷 金燕[1] LI Hao;LIU Haiyu;QIAO Xiaolei;XIE Yuting;JIN Yan(School of Electrical and Power Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学电气与动力工程学院,太原030024

出　　处：《动力工程学报》2024年第5期703-709,共7页Journal of Chinese Society of Power Engineering

基　　金：山西省重点研发计划资助项目(201903D321075)。

摘　　要：采用热重(TG)分析和电感耦合等离子体发射光谱仪(ICP-OES)研究了秸秆和煤矸石单独燃烧和共燃烧过程中的燃烧特性以及秸秆中碱金属元素的固留特性,采用Coats-Redfern积分法对秸秆和煤矸石共燃烧过程进行了动力学特性分析。结果表明:秸秆与煤矸石的混燃过程中存在强烈的交互作用,其中煤矸石掺混比例为10%时燃烧特性最优,混燃时随着煤矸石的添加,混合物的固定碳燃烧反应活化能降低且交互作用改变了燃烧过程中的反应机理;煤矸石质量分数为10%时对碱金属的释放抑制效果最好,在该比例下碱金属K、Na分别在1 000℃与1 100℃时的固定效果最优。Using thermogravimetric(TG)technique and inductively coupled plasma emission spectrometer(ICP-OES),the combustion characteristics of individual straw and coal gangue and their co-combustion characteristics,the retention characteristics of alkali metal elements in straw were investigated,and the kinetic characteristics of the co-combustion process of straw and coal gangue were analyzed using the Coats-Redfern integral method.Results show that in the co-combustion process of straw and gangue,there is a strong interaction,in which the best combustion characteristics are achieved with the gangue mixing ratio of 10%.With the increase of coal gangue addition,the combustion reaction activation energy of the fixed carbon in the mixtures decreases and the interaction gives rise to a change of reaction mechanism in the combustion process;the best inhibition effect for the release of alkali metals is attained with the gangue mass fraction of 10%,meantime the best retention effect of alkali metals K and Na is also attained at 1000℃and 1100℃,respectively.

关 键 词：生物质 煤矸石 共燃行为 固定碱金属 

分 类 号：TK16[动力工程及工程热物理—热能工程]