污泥与煤共热解过程中磷元素的挥发规律研究-燃料化学学报-中国.PDF

第40卷 第6期 燃摇 料摇 化摇 学摇 学摇 报 Vol.40 No.6 2012年6月 Journal of Fuel Chemistry and Technology Jun. 2012 文章编号:0253鄄2409(2012)06鄄0666鄄06 污泥与煤共热解过程中磷元素的挥发规律研究 张摇 强,吴摇 颜,李伟锋,刘海峰 (华东理工大学 煤气化教育部重点实验室,上海摇 200237) 摘摇 要:污泥灰分中磷元素含量明显高于煤,其中主要的晶体态含磷化合物为磷酸铁钙和少量的磷酸铝。 利用高频加热反应 装置考察了污泥鄄神府煤混合物快速热解过程中磷元素挥发规律。 结果表明,污泥鄄神府煤混合物热解后磷元素主要存在于热 解焦中。 磷元素挥发比例随污泥添加比例的增加先升高后降低,随热解温度的升高而增加。 热解温度不高于1100 益时,混 合物中以有机磷的挥发为主,磷元素挥发比例不高于3.2%。 热解温度高于1200 益后无机磷中磷元素挥发明显,1300 益下 最高有33.0%的磷元素随热解气体挥发出。 关键词:污泥;煤;热解;磷 中图分类号:X705摇 摇 文献标识码:A Volatilization of phosphorus during co鄄pyrolysis of sewage sludge and coal ZHANG Qiang,WU Yan,LI Wei鄄feng,LIU Hai鄄feng (Key Laboratory of Coal Gasification of EducationMinistry of China, East China University of Scicence and Technology,Shanghai摇 200237,China) Abstract:The phosphorus content of sewage sludge ash is higher than that of Shenfu coal, and its main phosphoric crystalline minerals are calcium iron phosphate and a certain amount of aluminum phosphate. The volatilization of phosphorus during co鄄pyrolysis of sewage sludge and Shenfu coal was studied with a high frequency furnace reactor in laboratory scale. It has been found that after pyrolysis most of the phosphorus in fuels is deposited in char. The volatilization ratio of phosphorus increases at first and then decreases with the increase of sewage sludge ratio in fuels. And it monotonically increases with the pyrolysis temperature. Organophosphoruscompoundsmake up the main part of volatized phosphoruswhen pyrolysistemperature isless than 1100 益 and itsvolatilization ratio islower than3.2%. Inorganic phosphorusdoesnot volatilize obviously until 1200 益,and the highest volatilization ratio of phosphorusis33.0% at 1300 益. Key words:sewage sludge;c