分离层数对多层分离结构旋风分离器性能的影响  

Effects of separation layer on the performance of multi-layer cyclone separators

作　　者：陈伟[1] 冯健美[1] 韩济泉 彭学院[1] CHEN Wei;FENG Jian-mei;HAN Ji-quan;PENG Xue-yuan(School of Energy and Power Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安交通大学能源与动力工程学院

出　　处：《高校化学工程学报》2019年第6期1378-1385,共8页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(51976154)

摘　　要：为提高旋风式油气分离器在变工况下的分离效率,提出了多层分离结构的旋风分离器,对该结构的分离性能进行了数值模拟和实验研究。在入口气速较大时(12~13 m·s^-1),三种不同分离结构的旋风分离器分离效率基本相同,但对于出口处直径为2~5μm的小油滴数量,具有三层分离结构的旋风分离器的比单层分离结构的旋风分离器减少了77.2%~51.0%;在入口气速较小时(7~8m·s^-1),具有三层分离结构的旋风分离器分离效率比单层分离结构的旋风分离器提高约24.1%。在所有测试工况下,三层分离结构的旋风分离器的压力损失比单层分离结构的旋风分离器降低了35%~45%。上述研究结果表明,三层分离结构的旋风分离器压力损失小,低负荷时分离效率高,高负荷时对较小油滴分离效果好,即三层分离结构的旋风分离器在变工况时均保持较高的分离性能。In order to improve the efficiency of cyclone separators under variable working conditions, a cyclone separator with a multi-layer cylinder structure was proposed. Numerical simulation and experiments on its separation performance were studied. When the inlet velocity was high(12~13 m·s^-1), the separation efficiency of the three different structures was basically consistent. However, for oil droplets with diameters of 2 ~5 μm, the number of oil droplets at the outlet of the three-layer cylinder separator were reduced by 77.2%~51.0%. When the inlet velocity was relatively low(7~8 m·s^-1), the separation efficiency of the three-layer cylinder separator was increased by 24.1%. The pressure loss of the three-layer cylinder separator decreased by 35%~45% compared with the cyclone separator with a single layer structure under studied conditions. The results show that the three-layer cyclone separator has low pressure loss, high separation efficiency under low loading and good separation efficiency of smaller oil droplets under high loading. This study indicates that the cyclone separator with a three-layer separation structure maintains high separation performance under variable working conditions.

关 键 词：多层分离 旋风分离器 数值模拟 分离效率 

分 类 号：TH138.82[机械工程—机械制造及自动化]