准东煤与稻壳混烧中颗粒物的生成特性

发布时间：2018-04-01 06:24

本文选题：颗粒物　切入点：PM_　出处：《中国电机工程学报》2016年16期

【摘要】：煤与生物质混烧是一种减少发电过程中污染物及温室气体排放的有效手段,随着雾霾问题的日益突出,在此过程中特别需要关注其颗粒物的排放问题。在沉降炉中开展了一种典型准东煤与稻壳混烧过程中颗粒物的生成特性研究。实验温度为1300℃,稻壳与准东煤的混配比例分别为7.5%、12.5%和20%。燃烧生成的颗粒物被低压撞击器(LPI)收集,其成分使用SEM-EDS进行测定。实验结果表明,准东煤燃烧时亚微米颗粒物(PM_1)的主要成分是Na、Mg、Ca、Fe、S,PM_(1-10)主要成分是Ca,而稻壳的PM_1主要成分是K、Cl、P,PM_(1-10)的主要成分是Si。在稻壳比例为12.5%和20%时,混烧减少了单位灰质量的PM_1生成量,原因在于2种燃料中的矿物质与燃烧过程中释放的易气化元素(Na,Mg,K)有交互作用。混烧时单位灰质量的超微米颗粒物(PM_(1-10))的生成量与2种燃料单独燃烧生成的PM_(1-10)的线性加和相当,且随着稻壳比例的增加而减少。
[Abstract]:Coal and biomass burning is an effective means to reduce pollutants and greenhouse gas emissions in the process of power generation, with the haze problems, emissions in this process should pay special attention to the particles in the furnace was carried out. The settlement of a typical coal and rice husk formation characteristics of particles in the process of mixing and burning. The temperature is 1300 DEG C, mixing ratio of rice husk and coal were 7.5%, 12.5% and 20%. burning particles generated by low pressure impactor (LPI) collection, its composition was determined using SEM-EDS. The experimental results show that coal combustion of submicron particles (PM_1) is the main component of Na. Mg, Ca, Fe, S, PM_ (1-10) is the main component of Ca and PM_1, the main ingredients of the rice husk is K, Cl, P, PM_ (1-10) is the main component of Si. in rice husk ratio was 12.5% and 20%, reducing the production of PM_1 mixed burning ash quality unit, because the 2 The release of fuel in the combustion process of the minerals and volatile elements (Na, Mg, K) interaction. Mixed coarse burning ash quality unit (PM_ (1-10)) separate combustion of PM_ production and 2 kinds of fuel (1-10) of the linear additive, and with the increase of rice shell ratio decrease.

【作者单位】：煤燃烧国家重点实验室(华中科技大学);青岛市黄岛区城市建设局工程建设管理中心;
【基金】：国家重点基础研究发展计划项目(973项目)(2013CB228501) 国家国际科技合作专项项目(2015DFA60410) 国家自然科学基金项目(51520105008)~~
【分类号】：X701

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