深井阳极阴极保护技术优化设计研究

Research on Optimization Design of the Anodic and Cathodic Protection Technology for Deep Wells

深井阳极技术具有性能稳定、电流分布均匀等优点,广泛应用于储罐底板阴极保护工程。基于深井阳极技术施工难度和经济性因素,提出了研究确定合理的深井阳极埋深的需求。根据经典带电圆盘电流密度分布假设,考虑土壤和沥青砂基础的不均匀性,提出了求解储罐底板阴极保护电位的新方法。研究了不同深井阳极埋深对应的储罐底板保护电位分布情况,得出结论:针对单个储罐和单支深井阳极的情形,合理的深井阳极埋深范围是25~45 m,储罐电位分布较均匀,可有效避免电流流失和储罐欠保护问题。

Because of the advantages of stable performance and even current distribution, deep well anodic technique is widely used in cathodic protection engineering of tank bottom plate.Based on the deep well anode construction technology difficulty and economic factors, the necessity of determining the reasonable deep well anode depth is proposed. According to the classical current density distribution hypothesis of charged discs, and considering the uniformity of soil and asphalt sand foundation, a new method for solving the tank bottom cathodic protection potential is put forward. Tank bottom cathodic protection potential distribution corresponding to different deep well anode depth is studied and it is concluded that the reasonable deep well anode depth range is25 m to 45 m for the single tank and anode, and uniform tank bottom potential distribution can avoid current wastage and tank under protection problem.