均苯四甲酸二酐； 重力热管换热器； 应用；
Pyromellitic Dinahydride Anhydride; Gravity Heat Pipe Heat Exchanger; Application;
介绍了重力热管换热器的工作原理、结构和传热特性，以及重力热管换热器在均苯四甲酸二酐生产中的应用情况。
The working principles, structure, and heat transfer characteristics of the gravity heat pipe heat exchangers, and their application in production of pyromellitic dianhydride anhydride were presented.
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