管道中亚微米颗粒热泳脱除技术的研究  

Thermophoretic Deposition of Sub-micro Particles in Tube Flows

作　　者：周涛[1] 杨瑞昌[2] 胡雨[1] 赵磊[2] 王世超[1] 刘若雷[2] 傅涛[1] 

机构地区：[1]华北电力大学核热工安全和标准化所,北京102206 [2]清华大学热能工程系,北京100084

出　　处：《动力工程》2009年第6期576-579,584,共5页Power Engineering

基　　金：国家重点基础研究发展计划资助项目(2007CB209800);北京市自然基金资助项目(3092016);博士点基金资助项目(200800791005)

摘　　要：通过对设计的实验系统进行测量,得到了亚微米颗粒热泳沉积效率的计算公式.由实验验证:相对于长管,短管可充分利用速度温度正在发展流,从而获得更高的热泳沉积效率.利用逐步递进原则,设计了1种将短管作为热泳除尘段,并和过渡段交替连接的除尘装置.结果表明:在采用8段热泳段的情况下,总除尘率可达到约83.24%.说明利用该原则能设计出可行的脱除亚微米颗粒的除尘设备.From measurements of a designed experimental system, calculation formula for thermophoretic deposition efficiency of sub-micro particles was derived. Experimental results demonstrate that compared with long tube, short tube makes good use of simultaneous developing flow of velocity and temperature, and therefore produces higher deposition efficiency. Based on step-by-step principles, a precipitator, taking short tube as its thermophoretic deposition section, was designed, in which the thermophoretic deposition and transition section are alternatively arranged. Results show that when 8 such thermophoretic deposition sections are used, the total removal efficiency can reach 83.24%, indicating that it is possible to design applicable precipitators for removal of sub-micro particles based on the step-by-step principle.

关 键 词：除尘设备 热泳 沉积效率 短管 亚微米颗粒 

分 类 号：TK121[动力工程及工程热物理—工程热物理]