聚偏氯乙烯聚合釜损伤及检验技术探讨

Discussion on Damage and Inspection Technology of Polyvinylidene Chloride Polymerizer

选择1台聚偏氯乙烯(PVDC)聚合釜作为检测对象,结合《NB/T 47013-2015承压设备损伤模式识别》对聚合釜的损伤和失效模式进行分析,认为氯化物应力腐蚀开裂是造成聚合釜内壁产生裂纹的典型损伤,而内表面渗透无损检测是最有效的检测方法。渗透检测结果发现,该反应釜内表面存在大量裂纹,经使用单位及时整改处理,避免了使用过程中物料泄漏,保证了装置的安全运行。

A polyvinylidene chloride(PVDC)polymerizer was selected as the test object,and the damage and failure modes of the polymerizer were analyzed in combination with NB/T 47013-2015 damage pattern recognition of pressure equipment.It is considered that chloride stress corrosion cracking is a typical damage that causes cracks in the inner wall of the polymerizer,and the inner surface penetration nondestructive testing is the most effective detection method.The penetration test results showed that there were a large number of cracks on the inner surface of the reactor.After timely rectification and treatment by the user,the material leakage during use was avoided,and the safe operation of the device was ensured.