王斯民¹,叶树沛¹,肖娟¹,王家瑞¹,文键²

• 1:西安交通大学 化学工程与技术学院，陕西 西安 710049
• 2:西安交通大学 能源与动力学院，陕西 西安 710049

摘要(Abstract)：

有研究表明对入炉前的水煤浆进行预热可以提高其气化效率，今利用数值模拟方法，采用非牛顿流体Bingham模型，计算并比较螺旋折流板换热器和弓形折流板换热器预热水煤浆时的流动换热性能。研究螺旋折流板换热器用于水煤浆预热的可行性以及螺旋角、搭接度对其流动换热性能的影响。结果表明：以单位压降的温升作为流动换热综合性能评价指标，螺旋折流板换热器更适于预热水煤浆。对螺旋折流板换热器，螺旋角和搭接度的变化对壳侧温升影响不大，而螺旋角的增大或搭接度减小能使壳侧压降明显降低。大螺旋角和小搭接度的换热器用于水煤浆预热时的流动换热性能更好。在螺旋角18°~40°、搭接度0%~50%，40°螺旋角，0%搭接度的螺旋折流板换热器的流动换热性能最好。研究结果可为选择水煤浆预热器的型式和结构参数提供参考。

关键词(KeyWords)： 水煤浆预热;Bingham模型;管壳式换热器;螺旋折流板;弓形折流板;数值模拟;非牛顿流体

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（51676146）；中央高校基本科研业务费专项资金（xjj2018202）。

作者(Author): 王斯民¹,叶树沛¹,肖娟¹,王家瑞¹,文键²

DOI: 10.3969/j.issn.1003-9015.2019.01.009

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