Emission Behaviors of Submicron Particles(PM_(1))Generated by the Combustion of Sesame Stalk after Combined Water Washing and Carbonization Pretreatment  

作　　者：Tianyu Liu Chang Wen Wenyu Wang Kai Yan Yongjun Xia Rui Li Juan Liu Yang Zhang 

机构地区：[1]State Key Laboratory of Coal Combustion,School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan,430074,China [2]Department of New Energy Science and Engineering,School of Energy and Power Engineering,Huazhong University of Science and Technology,Wuhan,430074,China [3]China-EU Institute for Clean and Renewable Energy,Huazhong University of Science and Technology,Wuhan,430074,China [4]State Grid Jiangxi Electric Power Science Research Institute,Nanchang,330096,China

出　　处：《Energy Engineering》2021年第3期473-485,共13页能源工程（英文）

基　　金：the National Key Research and Development Program of China(No.2016YFB0600605);Hubei Province Technology Innovation Project(No.2018AHB017);National Natural Science Foundation of China(No.52076091).

摘　　要：Pretreatment before biomass combustion is significant for its efficient utilization and that combined water washing and carbonization can be efficient.An agricultural processing residues sesame stalk was selected and carried out two pretreatments separately,i.e.,water washing-torrefaction(W-T)and torrefaction-water washing(T-W),to explore the effect on the fuel properties,combustion characteristics and particulate matter(PM)emission.The obtained biochar was also combusted under air and oxy50(CO_(2):O_(2)=50:50)conditions for the sake of investigating the effect of pretreatment and combustion atmosphere.The results indicate that,W-T and T-W both not only have great effect on the improvement of fuel properties but also reduce the content of water-soluble elements like K,Cl,etc.Due to the difference in hydrophobicity,the biochar obtained by W-T have the optimal fuel properties.At the same time,the pretreatment also hinder the combustion in a certain extent in which the comprehensive combustion characteristics(SN)show a downward trend.Furthermore,both two pretreatments have obvious benefit on the reduction of PM_(1)emission and W-T have the best effect related to the higher removal efficiency of inorganic elements(especially K+Na+Cl+S).Under oxy50 condition,the oxygen concentration and combustion temperature is higher,improving the sulfation of K and vaporization of Ca,P and Mg which result in weakening in the pretreatment reduction effect on PM_(1)emission.

关 键 词：Biomass TORREFACTION water washing OXY-FUEL PM_(1) 

分 类 号：TK1[动力工程及工程热物理—热能工程]