Fluid dynamics simulation and pilot test for polycarbonate liquid-liquid separator

doi:10.3969/j.issn.0438-1157.2013.06.029

CIESC Journal ›› 2013, Vol. 64 ›› Issue (6): 2109-2116.DOI: 10.3969/j.issn.0438-1157.2013.06.029

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Fluid dynamics simulation and pilot test for polycarbonate liquid-liquid separator

CHENG Huanong^1,2, LIU Qunshan¹, WANG Bingqiang¹, ZHENG Shiqing^1,2, FU Zhenbo³

1. Research Center of Computer and Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China;
2. Polyurethane Research Center of China North Industries Group Corporation, Qingdao 266042, Shandong, China;
3. Gansu Yinguang Chemical Industry Group Co., Ltd., Baiyin 730900, Gansu, China

Received:2012-09-18 Revised:2013-01-08 Online:2013-06-05 Published:2013-06-05
Supported by:
supported by the Foundation of China North Industries Group Corporation(20103702001902,20103702001578,20103702001622).

聚碳酸酯液液分离器的流体力学模拟和中试试验

程华农^1,2, 刘群山¹, 王炳强¹, 郑世清^1,2, 付振波³

1. 青岛科技大学计算机与化工研究所,山东青岛 266042;
2. 兵器集团公司聚氨酯研发中心, 山东青岛 266042;
3. 甘肃银光化学工业集团有限公司,甘肃白银 730900

通讯作者: 程华农(1974—),男,博士,副研究员。
作者简介:程华农(1974—),男,博士,副研究员。
基金资助:
兵器工业集团科技开发项目(20103702001902,20103702001578,20103702001622)。

Abstract

Abstract: The calculated Sauter average drop size of the dispersed phase is 330 μm in the liquid-liquid static settlement experiment for the polycarbonate mixture.The liquid-liquid separation process is simulated and analyzed using mixture multiphase flow model.Different types of coalescence plates are compared, including parallel plates, corrugated plates and inclined plates.The results show that inclined plates are more suitable to the polycarbonate liquid-liquid separation.For the water-oil volume ratio of 0.6, the optimal parameters for the inclined plates are:inclined angle 20°, board length 0.8 m, and plate spacing 40 mm.The maximal flow rate in the separator is 5.3×10^-3 m·s^-1.According to the calculation results, a polycarbonate liquid-liquid separator is designed and applied in the pilot scale test, which presents a good separation effect.The concentration of water/oil phases is close to the solubility.The maximal material flow rate in the actual liquid-liquid separator is 3.9×10^-3 m·s^-1.The common disc centrifuges can be replaced by the designed static separators, reducing the cost of equipment and operation greatly.

Key words: polycarbonate, liquid-liquid separator, inclined plate, fluid dynamics

摘要： 对聚碳酸酯混合液,通过液液间歇沉降实验得到分散相液滴的Sauter平均粒径为330 μm。采用Mixture多相流模型对聚碳酸酯液液静态分离器进行了模拟和分析。对平行板、波纹板和斜板进行了比较,得出斜板更适合聚碳酸酯液液分离。考察了斜板长、板间距、倾斜角度、入口流量对液液分离效果的影响,得出对于水油相体积比为0.6的物料,最优的聚结板参数为斜板倾角20°、板长0.8 m、板间距40 mm、筒内最大流速5.3×10^-3 m·s^-1。设计了聚碳酸酯液液分离器,进行了中试试验,水油两相出口浓度接近各自的溶解度值,筒内最大流速为3.9×10^-3 m·s^-1,结果表明该分离器起到了很好的液液分离效果,可以取代原有的碟片离心机设备,降低了设备和操作费用。

关键词: 聚碳酸酯, 液液分离器, 斜板, 流体力学

CLC Number:

TQ028.4

CHENG Huanong, LIU Qunshan, WANG Bingqiang, ZHENG Shiqing, FU Zhenbo. Fluid dynamics simulation and pilot test for polycarbonate liquid-liquid separator[J]. CIESC Journal, 2013, 64(6): 2109-2116.

程华农, 刘群山, 王炳强, 郑世清, 付振波. 聚碳酸酯液液分离器的流体力学模拟和中试试验[J]. 化工学报, 2013, 64(6): 2109-2116.

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Fluid dynamics simulation and pilot test for polycarbonate liquid-liquid separator

聚碳酸酯液液分离器的流体力学模拟和中试试验

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