锌灰泵的设计与建模仿真分析

发布时间：2018-07-14 20:04

【摘要】：针对热镀锌除渣困难的问题,上海宝钢公司设计了锌灰泵,旨在改善除渣条件,减少热镀锌过程中锌渣对钢板表面质量的影响。简述了锌灰泵制造与使用的意义,对锌灰泵进行了理论分析,基于气液两相流和湍流模型理论作数学建模,采用VOF模型作数值模拟,并对仿真结果进行分析,验证了锌灰泵利用虹吸原理实现清除锌渣的过程;并分析了锌灰泵在工作过程中内部流场的分布,发现锌灰泵出口喷出锌液锌渣速度受通入氮气的质量流量和压力的影响:当通入氮气流量较小时,锌液锌渣的喷出质量流量合理且喷溅范围较小;当通入氮气压力很大时,由于加速度的影响,使得出口处以氮气为主,因而喷出的锌液锌渣质量非常少,能量损失很大。通过分析得到了合适的通入氮气的初始状态,验证了该设备的合理性和实用性。
[Abstract]:In order to improve the slag removal conditions and reduce the influence of zinc slag on the surface quality of steel plate, Shanghai Baosteel Company designed zinc ash pump to solve the problem of hot galvanizing slag removal. The significance of manufacture and use of zinc ash pump is briefly described. The theoretical analysis of zinc ash pump is made. Based on the theory of gas-liquid two-phase flow and turbulence model, the mathematical model is built, and the VOF model is used as numerical simulation, and the simulation results are analyzed. The process of removing zinc slag by using siphon principle of zinc ash pump is verified, and the distribution of flow field inside zinc ash pump is analyzed. It is found that the velocity of zinc slag ejected from the outlet of zinc ash pump is affected by the mass flow and pressure of nitrogen: when the nitrogen flow rate is small, the mass flow rate of zinc slag is reasonable and the spatter range is small, and when the nitrogen pressure is high, Due to the effect of acceleration, nitrogen is mainly applied to the outlet, so the zinc slag ejected from the liquid zinc is of very little mass and energy loss. The proper initial state of nitrogen was obtained by analysis, and the rationality and practicability of the equipment were verified.
【作者单位】：宝钢股份公司冷轧厂;东北大学机械工程与自动化学院;
【分类号】：TG173;TH38

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