适合于正三角形排列布管的螺旋折流板换热器  

A Novel Helix Baffled Heat Exchanger Suitable for Tube Bundle Arrangement with Equilateral Triangles

作　　者：陈亚平[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《石油化工设备》2008年第6期1-5,共5页Petro-Chemical Equipment

基　　金：国家自然科学基金项目(50776016)

摘　　要：螺旋折流板换热器中流体以螺旋运动方式冲刷管束,克服了弓形折流板换热器中蛇形流动存在的局部压力损失、流动死角以及弓形缺口处部分管束支撑跨距过大易产生共振而造成振动破坏等缺点。针对绝大多数管壳式换热器都是正三角形排列布管的特点,在1/4椭圆-扇形螺旋折流板基础上改进设计出三分椭圆螺旋折流板。三分椭圆螺旋折流板可按特定布管方式的自然间隔来分块,也可以采用1/3分区布管。此方案可以应用于几乎所有目前采用弓形折流板的正三角形排列布管的换热器场合,且管孔的定位划线和制造加工工艺容易实现。In helix baffled heat exchangers the shell side fluid sweeps tube bundle with spiral di-rection. It can overcome the disadvantages with conventional segmental baffles of low heat transfer efficiency due to the flow stagnation in the so-called “stagnation regions”, higher pressure drop due to local losses with sudden turnings of the zigzagged serpentine flows,and short service time related to the vibration in some tubes with double span supports. The heat exchangers with trisection ellipse helix baffles are designed for tube bundle arrangement with equilateral triangles,and it is a modification at the bases of scheme with quadrant ellipse/sector baffles,which is suitable for tube bundle arrangement with squares. The trisection ellipse helix baffles are divided either along the interval between the rows of tube bundle of an integrated tube arrangement or just precise trisection. The novel heat exchangers with trisection ellipse helix baffles can be used in many application cases,and the manufacture technique of positioning and drilling the inclined holes on the baffles is simple and easy to realize.

关 键 词：螺旋折流板换热器 三分椭圆折流板 正三角形排列 倾斜角 

分 类 号：TQ051.501[化学工程]