换热器折流板间距和换热管排布形式对管板热应力影响分析  

Analysis on the Influence of Baffle Spacing and Tube Arrangement on Thermal Stress of Tube Sheet in Heat Exchangers

作　　者：于春柳[1] 任金平[1] 廖武平 YU Chun-liu;REN Jin-ping;LIAO Wu-ping(College of Chemistry and Chemical Engineering,Longdong University,Qingyang 745000,China)

机构地区：[1]陇东学院化学化工学院,庆阳745000

出　　处：《当代化工》2020年第11期2574-2578,共5页Contemporary Chemical Industry

基　　金：2019年甘肃省高等学校创新能力提升项目(项目编号:2019B-156);陇东学院青年科技创新基金项目(项目编号:XYBY140211)

摘　　要：管板作为固定管板式换热器的关键部件,其热应力是影响换热器的换热性能和使用寿命的主要因素。本文通过数值模拟方法,采用Ansys Workbench软件对某型号换热器管板进行有限元分析,研究不同折流板间距和换热管排布形式对应的管板的位移场、温度场和应力场分布。结果表明:折流板间距180mm时管板上的最大热应力大于折流板间距108 mm和77 mm时管板上的最大热应力;3种管板排布形式的最大等效应力从小到大依次为正方形(67.273 MPa)、转正三角形(74.359 MPa)和转正方形(78.136 MPa),在实际的换热器设计中可考虑选择正方形布管方式。通过分析,揭示了折流板间距和换热管排布形式对管板热应力的影响规律,为换热器结构优化设计提供一定理论基础。As one of key parts of fixed tube sheet heat exchanger,thermal stress of tube sheet is the main factor affecting the heat transfer performance and service life of the heat exchanger.In this paper,the finite element analysis of a heat exchanger’s tube sheet was carried out by means of numerical simulation,so the displacement field,temperature field and stress field distributions of the tube sheet corresponding to different baffle spacing and heat exchange tube arrangement were studied by Ansys Workbench software.The results showed that the maximum thermal stress on the tube sheet was greater when baffle spacing was 180 mm than those when baffle spacing was 108 mm or 77 mm.The order of the maximum equivalent stress of the three types of tube sheet arrangement was square(67.273 MPa)<rotated triangle(74.359 MPa)<rotated square(78.136 MPa).Through the analysis,the influence rule of baffle spacing and heat exchange tube arrangement on the thermal stress of tube sheet was revealed,which could provide some theoretical basis for the optimization design of heat exchanger structure.

关 键 词：换热器 管板 折流板间距 换热管排布形式 热应力 

分 类 号：TQ051.5[化学工程]