高频电磁脉冲循环冷却水污垢处理与热阻监测系统

换热设备中循环冷却水系统在高温下容易产生污垢，不但会降低换热设备的换热效率，还会影响设备安全。通过模拟实际工业循环冷却水结构，搭建了微型循环冷却水实验平台，采用高频电磁脉冲对人工配置的碳酸钙循环冷却水溶液进行阻垢处理，观察空白实验组和不同频率的高频电磁脉冲处理组中水垢形成情况，并利用自行设计的热阻监测系统对管道热阻进行监测。实验结果表明：高频电磁脉冲对循环冷却水起到了很好的阻垢作用，主要表现为循环冷却水的电导率下降趋势和pH值上升趋势均变缓。根据模拟换热器的热阻监测结果显示，高频电磁脉冲处理组的热阻要小于空白实验组的热阻，并进一步证实了高频电磁脉冲的阻垢作用。

Dirt treatment by high-frequency electromagnetic pulse for circulating cooling water and thermal resistance monitoring system

The circulating cooling water systems of heat transfer equipment generates dirt easily in high temperatures. Dirt will not only reduce thermal efficiency of heat exchange equipment, but also affect the equipment safety. This paper sets up a platform of miniature water cycle based on the real structure of industrial circulating water, uses high-frequency pulse treatment method to act on calcium carbonate in circulating cooling water of manual configuration, observes the impaction of blank group and different frequencies of high frequency electromagnetic pulse groups on fouling in cooling water, and monitors the thermal resistance of cooling water by a designed thermal resistance monitoring system. The results show that the high-frequency electromagnetic pulse treatment plays a very good anti-scaling effect on circulating cooling water, because both the conductivity decline trend and pH rising trend of water becomes slow. According to the thermal resistance data of analog exchanger, thermal resistances of high frequency processing groups are less than that of blank group. Moreover, it further confirms the important role of anti-scaling for high-frequency electromagnetic pulse.