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;
该均苯四甲酸二酐具有在运输、储存和使用期间不会引起堵塞等的粒子性 质。
The pyromellitic dianhydride has particle properties not causing plugging, etc. during its transportation, storage and use.
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.
气相氧化法是将空气与汽化后的均四甲苯混合进入含有催化剂的氧化反应器进行氧化反应，反应产物经换热冷却后，均苯四甲酸二酐直接从气相中凝华捕集。
In the method of air phase oxidation the mixed gas that boiling 1,2,4,5-tetramethyl benzene is combined with air is carried into oxidation reactor and reacts and then product gas is cooled.
气相氧化法是将空气与汽化后的均四甲苯混合进入含有催化剂的氧化反应器进行氧化反应，反应产物经换热冷却后，均苯四甲酸二酐直接从气相中凝华捕集。
In the method of air phase oxidation the mixed gas that boiling 1,2,4,5-tetramethyl benzene is combined with air is carried into oxidation reactor and reacts and then product gas is cooled.
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