列管式换热器是乙炔法生产聚氯乙烯的关键设备,其中的管子——管板接头在支行中由于应力和介质腐蚀的共同作用,导致接头破损失效,影响了正常生产,针对这一问题,对结构设计和制造工艺、焊接工艺诸方面,进行了相应的改进。1、换热器基本结构及工况条件列管式换热器的材质为16MnR, Tube heat exchanger is the key equipment for the production of PVC by the acetylene process. The pipe-tube plate joint in the branch, due to the combined effect of stress and medium corrosion, causes the connector to break down and damage the normal production, Problems, structural design and manufacturing processes, welding processes, etc., made the corresponding improvements. 1, the basic structure of heat exchanger and working conditions Tube heat exchanger material is 16MnR,