【作者】 蒋少青； 俞秀民； 支校衡；

【Author】 JIANG Shaoqing, YU Xiuming, ZHI Xiaoheng Changsha University of Science and Technology, 410076; Mechanical Clean Institute, Hunan University of Technology, 412008, Chengzhou Vocational Technical college, 423000)

【机构】 长沙理工大学； 郴州职业技术学院；

【摘要】 针对卧式列管换热器管外污垢清洗难题,提出了壳程双循环三相流态化在线清洗的新技术。用有机玻璃建造了直径500mm、长2000mm、传热管直径32 mm大型试验装置。采用水、河沙对传热管外的污垢进行清洗试验研究。结果表明:两侧布气管设置逆水方向斜喷气孔的结构和切换通气清洗的操作方法,不但可以实现管外三相流态化清洗液在横截面的正反旋转方向的循环流动,而且可以实现流态化粒子的轴向循环流动,达到清洗均匀、快速、经济的目的。依据试验结果,提出了清洗气体需要量的计算式为和结构优化设计的数据。这一清洗技术已经在工业成功应用,结构简单,操作简便,成本十分低廉。更多还原

【Abstract】 To solve the problem that it is difficult to remove the fouling on the outside wall of heat transfer tubes, the online-cleaning technology has been developed with double circulation of three-phase fluidization in shell side. A large pesiglass experiment model is built, in which each heat transfer tubes of 32mm diameter is 2000mm long and the inside diameter of the shell is 500mm. Water and sands are used to remove the fouling on outside tube wall in the experiments. The experiments show that two holes-tube can not only make the three-phase fluidized-bed to circulate in two opposite directions respectively in the cross section but also make it circulate in the longitudinal section. This can guarantee the fouling be removed evenly and quickly through the tubes. Though the experiments, the calculation formula of the amount of air in need is proposed and the data of structure optimization are given. This cleaning technology has been used in industry successfully. The structure is simple and the cost is low.. The operation is easy and convenient.更多还原