针对电化学除垢系统处理工业循环冷却水时能耗高的问题,采用锯齿板状阴极使系统能耗低至6.82 kW·h/(kg CaCO₃)。实验和数值模拟结果表明,系统能耗降低是因为锯齿板状阴极的尖端区域水垢的沉积速率快、垢层与阴极结合力弱,使得垢层容易脱落;同时垢层覆盖锯齿状阴极尖端区域后,垢层沉积反应逐渐由尖端区域向平缓区域转移,大大延长了阴极失活时间,使得电化学除垢系统能耗降低。因此,通过尖端区域和平缓区域的协同作用,可以有效缓解阴极失活导致的高能耗问题。

High energy consumption is a main problem in using electrochemical descaling system to treat with industrial circulating cooling water.A serrated cathode can help the system to reduce the energy consumption to as low as 6.82 kW·h/kg CaCO₃.Experimental and numerical simulation results show that the decrease of energy consumption of the system is due to high scale deposition reaction rate at the tip of the serrated cathode,which reduce the adhesion between scale layer and cathode.The scale layer easily falls off from cathode surface,which is beneficial to cathode regeneration.In addition,after the scale layer covers tip area,the deposition reaction of the scale layer gradually shifts from tip area to flat area,which greatly delays cathode's deactivation and reduces the energy consumption of the electrochemical descaling system.The high energy consumption problem caused by cathode deactivation can be effectively solved through the synergy of tip region and flat area.

黄亚鹏(1997-),男,硕士研究生,研究方向为电化学除垢,hyp20192020@163.com。