换热器管外水垢双向循环流态化周期清洗  

Periodic fouling removal of circulating fluidization

作　　者：刘桂英[1,2] 彭德其[1] 俞天兰[1] 俞秀民[1] 刘桂英 

机构地区：[1]湖南工业大学机械清洗研究所 [2]长沙理工大学

出　　处：《冶金能源》2005年第4期39-41,50,共4页Energy For Metallurgical Industry

基　　金：国家九五重点推广计划项目(编号96050403A);湖南省教育厅资助项目(编号04C114)的研究成果。

摘　　要：提出了分区切换送气,双向交替内循环流动的三相流态化立式传热设备壳程在线清洗方法,并且用有机玻璃建造了由40根32×3×2000传热管组成的大型立式试验台。采用色水法对其不同深度的截面速度场进行试验观测,结果表明:一根布气管可以带动每侧的两排传热管区域的流态化清洗;清洗气体的消耗量设计算式为23.8(D2Nd2);清洗气体的压力为壳程液体静压的1.10倍。这种清洗技术不仅结构简单,设备费用几乎不增加,操作方便,清洗费用低廉,而且污垢清洗均匀性好,速度快,无污染。It is quite difficult to remove of shell side in vertical shell-tube heat exchangers.Based on this,an online cleaning technology has been developed which utilizes the internal circulation of three-phase fluidization that flows in the opposite two direction by turn driven by feeding air.A large vertical pesiglass experimental set is designed and built which has 40 heat transfer tubes of 32mm×3mm×2000mm.the speed field in cross-section at different depth was tested through color water.The experiments show that the there-phase fluidization can be produced in the area of 2-3 tube layers of each side with one tube of air holes.The amount of needed air V is calculated through the equation V=23^8(D2-Nd2),the feed air pressure is equal to 1^1 times static pressure of shell-side liquid.Using this cleaning technique,not only the structure simple,there is no extra cost,the operation is convenient and the cleaning cost is low;but also fouling can be removed evenly and quickly without any pollution.

关 键 词：循环流态化 换热器管 双向 周期 水垢 三相流态化 内循环流动 清洗方法 传热设备 有机玻璃 试验观测 液体静压 清洗技术 设备费用 操作方便 污垢清洗 传热管 试验台 速度场 布气管 计算式 消耗量 均匀性 无污染 壳程 立式 

分 类 号：TK172.4[动力工程及工程热物理—热能工程]