摘要：

针对电化学除垢技术效率低的问题，系统研究了高效复合网状阴极电化学除垢的机理。研究结果表明：屏蔽效应使得外层网上的析氢反应强于内层网上的析氢反应，沉积反应优先发生在外层网。快速析出的氢气泡作为软模板，不仅可使水垢以枝晶形态生长，还使得外层网具有自清洁作用，大大延长了阴极的失活时间。同时，内层网增加了阴极的反应面积，在提高除垢速率的同时降低了阴极面积需求。

关键词: 电化学除垢, 循环冷却水, 阴极, 屏蔽效应, 碳酸钙垢

Abstract:

In view of the low efficiency of electrochemical descaling technology, the electrochemical descaling mechanism of high-efficient composite mesh cathode was systematically investigated. Results revealed that the shielding effect made the hydrogen evolution reaction on the outer nets stronger than that on the inner nets, and the deposition reaction occurred preferentially on the outer nets. As soft models, the rapidly evolved hydrogen bubbles not only caused the scale to grow in a dendritic shape, but also made the outer nets self-cleaning, which greatly prolonged the cathode deactivation time. At the same time, the inner nets increased the reaction area of the cathode, which increased the descaling rate and reduced the cathode area requirement.

Key words: electrochemical descaling, circulating cooling water, cathode, shielding effect, calcium carbonate scale

中图分类号: 

• TK268.+2