化工学报2023，Vol.74Issue(10)：4129-4139,11.DOI:10.11949/0438-1157.20230805
换热管内插螺旋阻垢性能及污垢微观特征
Scale-resisting properties and microscopic characteristics of the spiral insert of heat exchange tube
彭德其 1张寓川 1武洋 1俞天兰 2谭卓伟 1吴淑英 1陈莹 1唐明成 3彭建国3
作者信息
- 1. 湘潭大学机械工程学院,湖南 湘潭 411105
- 2. 湖南工业大学机械工程学院,湖南 株洲 412007
- 3. 株洲宏大高分子材料有限公司,湖南 株洲 412007
- 折叠
摘要
Abstract
In order to study the scale-resisting properties and scale-resisting mechanism of spirals inserted in tubes,the effects of three spirals inserted into heat exchange tubes at different flow rates on fouling thermal resistance and total heat transfer coefficient were experimentally studied.Meanwhile,the particle size and porosity of fouling were quantitatively characterized from a microscopic perspective to obtain the microstructure distribution of fouling.The results show that,under the experimental conditions,with the increase of flow velocity,the fouling resistance of the interpolation spiral decreases by 63%,the heat transfer coefficient decreases by more than 20%,and the interpolation spiral with a pitch of 20 mm has the best scaling performance.The particle size and porosity of dirt gradually increase from the near wall area to the surface area,and there is a clear crystal transition feature between the dirt layers.The porosity of the surface area and transition area of the fouling layer increases with the increase of flow velocity,and the change of the internal structure of the fouling by the characteristics of the interpolation spiral flow field is the fundamental reason for the difference in scale-resisting properties.关键词
结垢/内插螺旋/阻垢性能/显微结构/传热/孔隙率Key words
fouling/spiral insert/scale-resisting properties/microstructure/heat transfer/porosity分类
能源科技引用本文复制引用
彭德其,张寓川,武洋,俞天兰,谭卓伟,吴淑英,陈莹,唐明成,彭建国..换热管内插螺旋阻垢性能及污垢微观特征[J].化工学报,2023,74(10):4129-4139,11.
