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考虑储罐充装过程中储罐内空间电荷密度随填充时间的变化特性,建立了充装过程中立式柱形储罐内静电电势的动态分布计算模型.对比模型计算结果与文献中的实验测量数据,验证了模型的有效性.将该模型用于分析无输入管道、采用中间鹤管输入、采用底部管道输入3种情况下储罐内空间电势的动态分布规律,发现:3种情况下储罐内的空间最大电势、液面最大电势均随油品填充率先增加后降低;底部输入管道对储罐内静电电势分布的影响较小,中间输入鹤管可以显著降低储罐内的静电电势;采用中间鹤管输入时,保持油品流量恒定,空间电势最大值随鹤管直径增大而减小,流速恒定时空间电势最大值则随鹤管直径增大而增大.研究结果能够为储罐充装过程中输送条件、输送参数的选取提供指导,以降低充装过程中的静电风险.
Taking into account the variation of space charge density with the filling time in the process of filling the tank, a dynamic distribution calculation model of the electrostatic potential in the vertical column tank during filling is established. Comparing the calculated results with those in the literature The model was used to analyze the dynamic distribution of the space potential in the tank without input pipelines and the middle pipelines inputs and the bottom pipelines inputs. It was found that under the three conditions The maximum potential of the space and the maximum potential of the liquid in the tank firstly increase and then decrease with the filling rate of the oil. The influence of the input pipe at the bottom on the electrostatic potential distribution in the tank is small. The input of the middle crane tube can significantly reduce the electrostatic potential ; When the middle crane pipe was used for inputting, the flow of oil was kept constant, and the maximum value of space potential decreased with the increase of the diameter of crane pipe. The maximum value of space potential increased with the increase of crane pipe diameter at the same flow rate.The research results could be Conveyance conditions in the tank filling process, the selection of transport parameters to provide guidance to reduce the risk of static electricity filling process.