内热式沸腾干燥器换热管组研制

Research and Manufacture of Heat Transfer Tubes in Internal Heated Boiling Dryers

内热式沸腾干燥器是聚氯乙烯生产中关键核心设备，换热管组是该设备上主要部件。本文介绍了换热管组的结构和制造难度。较详细地说明了为解决难点所用工装的结构和使用方法及采取的工艺措施。

Internal heated boiling dryer is the key equipment in the production of the polyvinyl chloride, and the heat transfer tubes are the key part in this equipment. In this article, the structure of the tube set and difficult aspects in fabrication were introduced. Then, the methods and the structure of the tools to solve the problems were explained in detail.