循环流化床锅炉纯烧准东煤吹灰器选型及应用研究  

Study on Type Selection and Application of Sootblower for CFB Boiler Burning Pure Zhundong Coal

作　　者：资静斌 刘洪升 王学斌[3] 廖胜明[1] ZI Jing-bin;LIU Hong-sheng;WANG Xue-bin;LIAO Sheng-ming(School of Energy Science and Egnineering,Central South University,Changsha,410083,China;Hebei Chengyi Environmental Protection Equipment Co.Ltd.,Hengshui,053200,China;MOE Key Laboratory of Thermal-Fluid Science and Engineering,Xi′an Jiaotong University,Xi'an,710049,China)

机构地区：[1]中南大学能源科学与工程学院,湖南长沙410083 [2]河北诚毅环保设备有限公司,河北衡水053200 [3]西安交通大学热流科学与工程教育部重点实验室,陕西西安710049

出　　处：《热能动力工程》2020年第5期268-273,共6页Journal of Engineering for Thermal Energy and Power

摘　　要：新疆某化工厂45 t/h循环流化床锅炉纯烧准东煤,省煤器积灰严重,导致排烟温度超过200℃。以该锅炉省煤器为研究对象,分析了省煤器积灰特征并选择气能激波吹灰器进行改造,对比了改造前后的排烟温度。研究表明:省煤器迎风面和背风面积灰为疏松多孔结构,积灰粒径范围在5~10μm,呈椭球状或不规则球状,迎、背面灰分组成差异不大,主要由NaCl、MgO、CaSO4、CaCO3和SiO2等组成,省煤器管束底层黏附的积灰难以清理;气能激波吹灰器对未沉积成型疏松性积灰有效,能大幅度改善省煤器换热效果,排烟温度下降了约40℃。A 45 t/h circulating fluidized bed boiler at a chemical plant in Xinjiang burns pure Zhundong coal and has severe ash deposition on the economizer,resulting in the exhaust gas temperature exceeding 200℃.In this paper,the economizer of the boiler is taken as the research object and the characteristics of ash deposition in the economizer are analyzed.The gas-energy shock sootblower is selected for the retrofit,and the flue gas temperatures before and after the retrofit are compared.The results show that the ash in the windward and leeward areas of the economizer is porous and loose.The particle size ranges from 5 micron to 10 micron.It is ellipsoid or irregular spherical.There is little difference in ash composition between the windward and the backside of the economizer.There are mainly NaCl,MgO,CaSO4,CaCO3 and SiO 2.The ash deposited on the bottom of the economizer tube bundle is difficult to clean.The gas-energy shock sootblower is effective for unconsolidated formed loose ash deposit,which can greatly improve the heat transfer effect of economizer,and the exhaust temperature is decreased by about 40℃.

关 键 词：准东煤 循环流化床锅炉 沾污积灰 吹灰器 

分 类 号：TK284.4[动力工程及工程热物理—动力机械及工程]