煤与小麦秸秆及污泥燃烧及成灰特性实验研究  

Co-Combustion and Ash Formation Characteristics of Coal,Wheat Straw and Sludge

作　　者：张涛 袁天霖 杨琨 王长安[2] 车得福[2] Zhang Tao;Yuan Tianlin;Yang Kun;Wang Chang’an;Che Defu(Shanghai Power Equipment Research Institute Co.,Ltd.,Shanghai 200240,China;State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]上海发电设备成套设计研究院有限责任公司,上海200240 [2]西安交通大学动力工程多相流国家重点实验室,西安710049

出　　处：《燃烧科学与技术》2024年第6期580-589,共10页Journal of Combustion Science and Technology

基　　金：国家电投科技资助项目(KYB12022HB01).

摘　　要：通过热重分析法实验研究探讨了烟煤耦合不同含碳废弃物时的燃烧特征参数变化规律,并进一步对掺混燃料的成灰特性进行了深入分析.实验结果表明:当小麦秸秆掺混比低于50%时,增加小麦秸秆掺混比例可以降低着火与燃尽温度,改善烟煤的燃烧特性;而当小麦秸秆掺混比增加超过50%时,燃尽温度相比低秸秆掺混比例有较大幅度升高,灰熔点有所上升,灰中矿物质的赋存形态更加复杂,从单一的SiO_(2)为主演变为以Si、Al、Mg、K等的氧化物为主.增加污泥的掺混比例,样品中水含量有所提高,燃尽温度与燃烧反应性指数降低,灰样中块状颗粒所占比例提高,聚团现象明显,Fe、Ca、Mg元素占比明显上升,矿物质成分从以SiO_(2)为主逐渐演变为以Fe_(2)O_(3)和复杂的铁盐为主,碱性氧化物比例有所升高.In this paper,thermogravimetric analysis was used to study the variation of characteristic parameters of bituminous coal blended with different carbon-containing wastes.Meanwhile,the ash formation characteristics of blended fuels were experimentally studied.The results show that the combustion characteristics of bituminous coal can be improved and the ignition and burnout temperature can be reduced by appropriately increasing the blending ratio of wheat straw.When the blending ratio increases beyond 50%,the burnout temperature of blended fuels increases significantly compared with that of the low straw blending ratio,and the melting point also increases.The minerals in the ash becomes more complex,evolving from being primarily composed of SiO_(2) to being dominated by oxides of Si,Al,Mg,K and others.Increasing the blending ratio of sludge leads to a higher water content in the sample and reduced burnout temperature and combustion reactivity index.The lump particles in the ash sample of high sludge proportion are more easily observed,and the agglomeration phenomenon is obvious.The contents of Fe,Ca and Mg elements increase significantly when the sludge increases in the blended fuels,which means that the proportion of basic oxides increases,and that the main mineral changes from SiO_(2) to Fe_(2)O_(3) and complex iron salts.

关 键 词：含碳废弃物 碳减排 燃烧特性 成灰特性 

分 类 号：TK6[动力工程及工程热物理—生物能]