Effect of semi-continuous water washing on the combustion behaviors of agricultural organic solid waste  

作　　者：Xiangxi Wang Zhenzhong Hu Jinrong Ma Linlin Yi Jian Li Yanfeng Cheng Jianfei Ma Na An Feng Wang Xian Li Junjun Yan Bo Wei Yue Li Guangqian Luo Hong Yao 

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]Key Laboratory of Coal Clean Conversion and Chemical Process Autonomous Region,School of Chemical Engineering and Technology,Xinjiang University,Urumqi 830000,China [3]Xinjiang Xinye Energy Chemical Engineering Co.Ltd,Urumqi 830000,China

出　　处：《Carbon Resources Conversion》2023年第1期58-64,共7页碳资源转化（英文）

基　　金：the financial supports provided by the National Key Research and Development Program of China(2019YFC190252).

摘　　要：Combustion of agricultural organic solid waste(AOSW)was an ideal solution for their resource utilization in view of their massive annual production and great potential for reduction of fossil fuel utilization.However,high alkali and alkaline earth metals(AAEMs)content in the feedstock can arose severe fouling and slagging issues and thus prohibiting its vast utilization.In this study,a semi-continuous water washing method was proposed to preliminarily remove AAEMs from agricultural organic solid waste and its effects on the combustion behaviors of washed solid product were investigated.Results showed that the combustion index S were improved to 2.63×10-6,over 68%of the total ashes were removed from the cotton stalk,and 96.3%,89.0%and 74.7%of K,Na and Mg were effectively removed,respectively.Moreover,the softening temperature of low temperature ash from the washed sample was as high as 1450◦C,538◦C higher than the low temperature ash from the original sample;the base acid ratio and fouling index were improved from high slagging and fouling risk(1.7 and 90.8)of the original organic solid waste to low and medium risk(0.4 and 3.5),respectively.All these results signified the contributing effect of proposed semi-continuous water washing method on the combustion of agricultural organic solid waste.In a word,this study provided a promising method for fouling and slagging inhibition during the agricultural organic solid waste combustion.

关 键 词：Agricultural organic solid waste Semi-continue water washing Alkali and alkaline earth metals Fouling and slagging Combustion characteristics 

分 类 号：X712[环境科学与工程—环境工程]