防污染的自消应力高纯度气体低温换热器的设计  

Design of the high-purity gas cryogenic heat exchanger which can eliminate stress by itself and prevent its medium from being polluted

作　　者：陈树军[1] 汪荣顺[1] 石玉美[1] 

机构地区：[1]上海交通大学制冷和低温工程研究所,上海200240

出　　处：《低温与超导》2007年第4期293-297,共5页Cryogenics and Superconductivity

基　　金：2003年上海市科委重大项目"面向空间领域的若干科学与关键技术"(03DZ14014);科技部2004年"国际科技合作重点项目计划"项目(2004CB720703)资助

摘　　要：该设计解决了低温工程与低温技术等领域所使用的高纯度气体介质换热的要求,具有显著的经济效益和社会效益。其换热器是由四个管壳式热交换器串联组合而成,壳体呈窄矩形,换热管采用U形换热管,四个管壳式热交换器呈方阵置放在低温换热器筒体内。低温换热器采用的材料是0Cr18N i9/304,该种材料的透气性小、耐磨损、抗腐蚀能力强和性能稳定,防止了气体被污染。另外在低温下,考虑了材料的热胀冷缩所产生的应力,使应力能够自行消除,提高了它的密封性能,最终使低温换热器密封性能好,防止了气体被污染,保证了气体的高纯度。Heat exchange of high- purity gas medium is solved in cryogenic engineering and cryogenic technology, which can bring evi- dently economic and social benefits. The heat exchanger is made of 4 shell - and - tube exchangers that are series - wound. The shell of 4 shell - and - tube exchangers is narrow rectangle and tube is U - shape. They are arrayed in the cylinder of cryogenic heat exchanger. The material used in cryogenic heat exchanger is 0Cr18Nig/304. It has many good characteristics, such as the small permeability, the wearability, the high corrosion resistance and the steady performance, which can prevent the gaseous medium from being polluted. Moreover, the stress produced by heat expansion and cold shrink of the material is considered. It can be voluntarily eliminated, which can enhance sealing property of heat exchanger. Eventually make cryogenic heat exchanger having good sealing property and prevent its gaseous medium from being polluted, which can make sure the high purity of the gaseous medium.

关 键 词：低温换热器 防污染 高纯度气体 管壳式换热器 自消应力 

分 类 号：TB657.5[一般工业技术—制冷工程]