Abstract: Fuel oil leakage of heat exchanger is a general question in the circulating water system of Chinas petrochemical industry. The hidden leakage in the heat exchanger of circulating water system makes it difficult to be discovered in time when it leaks. Thus it leads to a large amount of oil spill, the corrosion of water cooling equipment, and potential hazards of systems normal operation and safe production. Therefore, it is very important to develop one technology for safe production of the units and the long period operation of system that can promptly distinguish the leakage material and leakage spot. According to the vector angle method, programmings with VB6.0 that can auto analyze two liquid spectrograms and calculate the similarity. The results show that this method can evaluate the similarity of liquid chromatography very well and it can be used for the leakage detection of the refinery circulating water system.

Key words: Similarity , Chromatograph chart , Three λ-B spline curves

摘要： 循环水系统内换热器中的油料泄漏在国内石化企业中是一个普遍存在的问题。由于循环水系统中
换热器内漏的隐蔽性,泄漏时不能及时发现,从而造成油品的大量泄漏,造成对水冷设备的腐蚀,潜在地危害系统的
正常运行,并给安全生产带来重大隐患。因此,研制一种能够及时识别泄漏物质及泄漏点的技术,对装置的安全生
产以及长周期运行尤其重要。根据向量夹角法,用VB6.0编程自动完成分析两个液相谱图间的色谱峰匹配并计算
相似度。结果表明,此方法能较好地定量评价液相图谱间的相似性,可应用于炼油厂循环水系统的漏点检测。

关键词: 相似度 , 色谱图 , 三次λ-B样条曲线