介绍了苯酐装置系统中增加部分冷凝器的流程，操作讨论了加部分凝冷器前后的经济效益。
The flow sheet and operation in phthalic anhydride plant system after the adding partial condensator were introduced.
苯酐冷凝器是苯酐精制生产最重要的换热器之一，其主要失效形式为应力腐蚀。
Phthalic Anhydride condenser is one of the most important heat exchangers in Phthalic Anhydride refining production, and its main failure mode is stress corrosion.
结果表明，装置系统改造能提高切换冷凝器的寿命，提高苯酐收率。
It was showed that the plant system modification could prolong condensator life and enhance the yield of phthalic anhydride.
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