双室蒸发分离室内流动及蒸发过程的数值模拟

发布时间：2018-01-06 10:13

本文关键词：双室蒸发分离室内流动及蒸发过程的数值模拟　出处：《化学工程》2016年03期 　论文类型：期刊论文

【摘要】：掌握双室双管程蒸发器分离室内汽液二相流动及蒸发过程特性是其进一步结构优化的基础,应用STARCCM+软件对分离室内隔离板上平衡孔的形状和位置对汽液二相流动及蒸发过程的影响进行了数值模拟。模拟结果表明:分离室内隔离板上平衡孔较佳的形状为圆形孔,其适宜的设置位置为距分离室底部与距汽液入口处距离之比在2∶3—2∶1之间。设置在该区域时,分离室内流场均匀,流动阻力损失较小,推动力较大;在平衡孔形状及位置较佳的情况下,分离室一内液位高于分离室二,隔离板两侧温度分布相对比较均匀,并能够建立起稳定的温度差和浓度差,在分离室上方汽液能够实现较好的分离;模拟结果进一步证实了双室双管程蒸发器实际操作的可行性。
[Abstract]:It is the basis of further structural optimization to master the characteristics of vapor-liquid two-phase flow and evaporation process in a two-chamber double-side evaporator. The influence of the shape and position of the balancing hole on the vapor-liquid two-phase flow and evaporation process in the isolator is simulated by STARCCM software. The simulation results show that:. The better shape of the balance hole on the isolation board is a circular hole. The suitable position is that the ratio of the distance between the bottom of the separation chamber and the entrance of the vapor liquid is between 2: 3-2: 1. The flow field in the separation chamber is uniform, the loss of flow resistance is small, and the driving force is larger. When the shape and position of the balanced hole is better, the liquid level in the separation chamber is higher than that in the second one, the temperature distribution on both sides of the isolation plate is relatively uniform, and the stable temperature difference and concentration difference can be established. Better separation can be achieved above the separation chamber. The simulation results further confirm the feasibility of practical operation of double chamber and double pipe evaporator.
【作者单位】：天津大学仁爱学院化工系;河北工业大学化工学院;河北工业大学海水资源高效利用化工技术教育部工程研究中心;
【分类号】：TQ051.62
【正文快照】： 3.海水资源高效利用化工技术教育部工程研究中心,天津300130)传统蒸发器[1-3]一般采用多效串联操作的模式,在其中的每一效中分设一个加热室和一个分离室,当被蒸发物料的黏度随浓度变化较大时,总传热系数将随着蒸发的进行有较大下降。对此,国内外学者对其进行了广泛的研究,Cela

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