为探究超声波对高炉循环冷却水的阻垢效应，采用正交试验方法研究超声频率、功率和循环水流速对高炉循环冷却水Ca2+浓度的影响。结果表明：影响主次顺序为超声频率＞循环水流速＞超声功率；阻垢效果最佳组合参数为超声频率30kHz，循环水流速0.6m/s，超声功率为400W（100W/cm2换能器与循环水管接触面积），此条件下作用8h Ca2+浓度为84.2mg/L，阻垢效果明显；对超声波作用下模拟水样的电导率与时间的关系进行了曲线拟合；当超声功率为400W时，运行8h后的实际能耗为3.571kW·h，效率最高，达到89.6%。
In order to probe anticlogging effect of ultrasonication for circulation water of blast furnace, the effect of ultrasonic frequency, powder and velocity of circulating water on Ca2+ concentration was investigated using the orthogonal method. The results show that the primary factor is ultrasonic frequency; the secondary factor is velocity of circulating water and the last one is ultrasonic powder. Under the condition of ultrasonic frequency of 30kHz, velocity of circulating water of 0.6m/s and ultrasonic power of 400W, the best anticlogging effect can be obtained (the contact area between energy converter and circulating water pipe is 100W/cm2). For example, the Ca2+ concentration can reach 84.2mg/L after 8 hours. The regression function of electric conductivity to time under ultrasonication is obtained. The energy consumption is 3.571kW·h in 8 hours test and the efficiency is 89.6%.
参考文献
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