School of Mechanical & Electrical Engineering, Wuhan Institute of Technology, Wuhan 430000, China E-mail:
Water Sci Technol. 2021 Nov;84(9):2432-2445. doi: 10.2166/wst.2021.436.
In order to promote the application of electrochemical water softening technology in industrial circulating cooling water systems, electric field type, cathode structure and solution residence time are selected for optimization analysis of an electrochemical water softening device. The experimental results show that the water softening performance per unit area of mesh cathode is better than that of a plate cathode. In addition, the softening amount per unit area of the mesh cathode can be further increased when the high-frequency (HF) power supply is applied. When the HF power supply is applied, the softening amount per unit area is 158.58 g/m·h more than when the direct current power supply is applied. In order to explore the growth mechanism of calcium carbonate, micro-analysis technology and high-speed bubble photography technology are used. The results show that the bubbles escape along the longitudinal direction of the electrode plate, and the main growth direction of calcium carbonate growth is consistent with the escape direction of the bubble; that is, the bubbles grow along the longitudinal direction of the electrode plate. The special structure of the diamond-shaped mesh cathode facilitates the growth of calcium carbonate crystals.
为促进电化学水软化技术在工业循环冷却水中的应用，对电化学水软化装置进行了电场类型、阴极结构和溶液停留时间的优化分析。实验结果表明，网阴极单位面积的水软化性能优于板阴极。此外，当应用高频（HF）电源时，网阴极的单位面积软化量可以进一步增加。当应用 HF 电源时，单位面积的软化量比应用直流电源时多 158.58 g/m·h。为了探究碳酸钙的生长机制，采用微观分析技术和高速气泡摄影技术。结果表明，气泡沿着极板的纵向方向逸出，碳酸钙生长的主要方向与气泡的逸出方向一致，即气泡沿着极板的纵向方向生长。菱形网阴极的特殊结构有利于碳酸钙晶体的生长。
