金屬冶煉爐循環水的重要性

In most metal smelting furnaces, the furnace body and the power cabinet have two independent water systems, an internal circulation system, an external circulation system, internal closed-circuit deionized water, and include a water-to-water heat exchanger, rectification Silicon, reactors, filter capacitors, inverter silicon, and resonance capacitors are all connected to this system. Since the internal water system circulates in the DC high voltage, the internal cooling water will generate electric ions under the action of the pipeline DC high voltage. After a period of time, the concentration of electric ions will gradually increase. When the concentration of electric ions exceeds the required value, the high DC voltage will corrode the copper joints through the cooling water with high concentration of ions, resulting in the situation seen in the photo below. If the water connector corrodes and breaks during use of the power supply, the pressurized cooling water will spray out, causing major equipment accidents, and the cooling water with high concentration of electric ions will reduce the insulation of the system, which is more likely to cause damage to the thyristor Therefore, the conductivity of the cooling water should be checked regularly, and it must be less than 10us/cm. If the conductivity is greater than 100us/cm, replace the circulating cooling water in all power cabinets, and it is recommended to replace it every six months.

在使用閉式水冷時還有一個問題需要注意。 水冷系統應裝有排氣閥。 但在實際使用中，大多安裝了不帶排氣閥的水冷系統。 爐子長期不用時，氣體很容易進入分水器。 當金屬冶煉爐重新啟動時，部分氣體會滯留在部件的分水器和冷卻水箱中，無法排出，導致該部件出現故障。 循環水冷卻導致溫度過高而燒壞元件。 因此，不帶排水閥的水冷系統長期不使用，重新啟動。 必須鬆開水分離器最高點的水夾，以排出剩餘氣體。