| 液-液同向流中冰浆的形成 |
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| 引用本文： | 彭正标,袁竹林,梁坤峰,蔡杰.液-液同向流中冰浆的形成[J].中国化学工程学报,2008,16(4):552-557. |
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| 作者姓名： | 彭正标 袁竹林 梁坤峰 蔡杰 |
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| 作者单位： | School of Energy and Environment, Southeast University, Nanjing 210096, China |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | A new technique for ice slurry production was explored. Multiple small water-drops were formed in another immiscible chilled liquid by a single-nozzled atomizer and frozen in the fluidized bed by direct contact heat transfer. Experiments were conducted to investigate the dynamic behaviors of the ice crystal making system. The results demonstrate that the ice crystals could be produced continuously and stably in the vertical bed with the circulating coolant of initial temperature below -5℃. The size distribution of the ice crystals appears non-uniform, but is more similar and more uniform at lower oil flow rate. The mean ice crystal size rests seriously with the jet velocity and the oil flow rate. It decreases with decreasing the oil flow rate, and reaches the maximum at an intermediate jet velocity at about 16.5 m.s y. The ice crystal size is also closely related to the phenomenon of drop-coalescing, which can be alleviated considerably by reducing the flow rate or lowering the temperature of the carrier oil. However, optimization of liquid-liquid atomization is a more effective approach to produce fine ice crystals of desired size.
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| 关 键 词： | ice slurry drop-coalescing ice crystal size distribution liquid-liquid atomization |
| 收稿时间： | 2007-9-24 |
| 修稿时间： | 2007-9-24
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Ice slurry formation in a cocurrent liquid-liquid flow |
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| PENG Zhengbiao,YUAN Zhulin,LIANG Kunfeng,CAI Jie.Ice slurry formation in a cocurrent liquid-liquid flow[J].Chinese Journal of Chemical Engineering,2008,16(4):552-557. |
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| Authors: | PENG Zhengbiao YUAN Zhulin LIANG Kunfeng CAI Jie |
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| Affiliation: | School of Energy and Environment, Southeast University, Nanjing 210096, China |
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| Abstract: | A new technique for ice slurry production was explored.Multiple small water-drops were fonlned in another immiscible chilled liquid by a single-nozzled atomizer and frozen in the fluidized bed by direct contact heat transfer.Experiments were conducted to investigate the dynamic behaviors of the ice crystal making system.The results demonstrate that the ice crystals could be produced continuously and stably in the vertical bed with the circulating coolant of initial temperature below-5℃.The size distribution of the ice crystals appears non-uniform,but is more similar and more uniform at lower oil flow rate.The mean ice crystal size rests seriously with the jet velocity and the oil flow rate.It decreases with decreasing thle oil flow rate,and reaches the maximum at an intermediate jet velocity at about 16.5 m·s-1.The ice crystal size is also closely related to the phenomenon of drop-coalescing,which can be alleviated considerablv by reducing the flow rate or lowering the temperature of the carrier oil.However,optimization of fiquid-liquid atomization is a more effective approach to produce fine ice crystals of desired size. |
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| Keywords: | ice slurry drop-coalescing ice crystal size distribution liquid-liquid atormzation |
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