循环流化床锅炉返料换热装置冷态试验研究  

Cold test on returning heat exchanger device used for circulating fluidized-bed boilers

作　　者：吉辉[1] 卢啸风[1] 陈娟[1] 亢银虎[1] 

机构地区：[1]重庆大学低品位能源利用技术及系统教育部重点实验室,重庆400044

出　　处：《化学工程》2011年第4期75-78,共4页Chemical Engineering(China)

基　　金：重庆大学211工程"三期建设"项目(S-09101)

摘　　要：针对一种工业循环流化床(CFB)装置专利技术,提出了新的返料换热装置方案。并在一个循环流化床冷模试验系统中,对返料换热装置气固流动特性与结构尺寸的关系进行了试验研究。通过改变回料换热室进出口结构尺寸,增设径向侧送风等,观察分析不同结构参数条件对回料系统内床料气固流动状况的影响。试验得到了回料室进口底流孔面积、返料口高度、立管径向侧风等结构参数与返料换热装置内的气固流动参数之间的定性和定量关系。Based on the patent technology of a small circulating fluidized bed（CFB） device,a new scheme of returning heat exchanger device was developed.And cold test on the relationship between the structure sizes and the gas-solid flow characteristics was studied in the CFB boiler model system.By changing the geometric dimensions of the inlet and outlet of back-feeding chamber,adding lateral air supply in radial direction,the gas-solid flow characteristics of back-feeding system in different structural parameters and operating conditions were analyzed.The results show that the qualitative and quantitative relationship between gas-solid flow characteristics in returning heat exchanger device and structural parameters of back-feeding chamber,such as the area of bottom orifice,height of returning orifice,lateral air supply for standpipe and so on.

关 键 词：外置式换热器 回料室 气固流动特性 立管压降 

分 类 号：TK229.66[动力工程及工程热物理—动力机械及工程]