Abstract:

Petrochemical industry is the basis of modern industry,and the recirculating cooling water system is an essential part of the refining enterprise. The medium leakage of cooling water heat exchangers will seriously affect the normal production and operation,and even cause the device shutdown or other serious consequences. Medium leakage of heat exchangers is often accompanied by obvious apparent characteristics. The leaked medium and its apparent characteristics of recirculating cooling water system in petrochemical enterprises were summarized, as well as the changes in water quality. The logic, methods, and treatment measures for detecting medium leakage were outlined. Taking the sudden leakage in a petrochemical enterprise as an example, the apparent characteristics, leakage detection process, and treatment measures of recirculating cooling water system in refining and chemical units were analyzed. Based on the analysis of specific leakage cases, it was concluded that oil content and COD method was more effective to detect recirculating cooling water system leakage in refining units. Meanwhile, turbidity method could be used as an approach for early and rapid determination of leakages. VOC method could quickly determine whether there was medium leakage in recirculating cooling water system of chemical units.

Key words: cooling water, petroleum refining, leakage, technology of leakage detection

摘要：

石油化工行业是现代工业的基础，循环冷却水系统是炼化企业必不可少的组成部分。冷却水换热器一旦出现物料泄漏情况会严重影响企业的正常生产运行，甚至造成装置停车等严重后果。换热器物料泄漏往往伴随比较明显的表观特征，总结了炼化企业循环冷却水系统泄漏物料及其表观特征和水质变化情况，概述了循环冷却水系统物料泄漏后的查漏逻辑、方法以及处理措施。以某石化企业生产运行过程中突发泄漏情况为例，分析了炼油装置和化工装置循环冷却水系统物料泄漏的表观特征、查漏流程及处理措施。通过对具体泄漏情况的分析得出，采取油含量、COD法检测炼油装置冷却水系统泄漏较为有效，同时浊度法可作为提前快速判断泄漏的基础方法，采取VOC法能快速判断化工装置循环冷却水系统是否存在物料泄漏。

关键词: 循环冷却水, 石油炼化, 泄漏, 查漏技术

CLC Number: 

• TQ085