| 三相循环流化床蒸发器防除垢机理 |
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| 引用本文： | 张少峰,李修伦,刘明言,林瑞泰. 三相循环流化床蒸发器防除垢机理[J]. 化工学报, 2002, 53(5): 454-456 |
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| 作者姓名： | 张少峰 李修伦 刘明言 林瑞泰 |
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| 作者单位： | 天津大学化工学院 |
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| 基金项目： | 国家“九五”重点科技攻关项目 |
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| 摘 要： | 引 言结垢是蒸发器加热壁面上经常遇到的问题 .垢层严重地降低了换热效率 ,使传热过程迅速恶化 ,蒸发器的防、除垢问题受到人们的普遍重视 .张利斌、李修伦等[1] 研究了汽液固三相循环流化床蒸发器沸腾传热和防、除垢性能 ,本文进一步考察该蒸发器的防、除垢机理 ,并对其进行了分析 .1 汽液固三相流剪应力“混相流”模型根据文献 [1],蒸发管内的汽液固三相流动呈现“混相流”的特性 ,因此为便于分析及突出问题的基本特征 ,假设 :(1)温度场引起的物性变化忽略不计 ;(2 )蒸发管内的汽液两相流动视为均相流动 ,蒸汽的惟一效果是改变了“流体…
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| 关 键 词： | 流化床 蒸发器 防除垢 三相流 混相流 |
| 文章编号： | 0438-1157(2002)05-0454-03 |
| 修稿时间： | 2002-01-08 |
MECHANISMS ON PREVENTING AND CLEANING FOULING IN THREE-PHASE CIRCULATING FLUIDIZED BED EVAPORATOR |
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| ZHANG Shaofeng,LI Xiulun,LIU Mingyan,LIN Ruitai. MECHANISMS ON PREVENTING AND CLEANING FOULING IN THREE-PHASE CIRCULATING FLUIDIZED BED EVAPORATOR[J]. Journal of Chemical Industry and Engineering(China), 2002, 53(5): 454-456 |
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| Authors: | ZHANG Shaofeng LI Xiulun LIU Mingyan LIN Ruitai |
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| Abstract: | A model of "mixed phase flow" for preventing and cleaning fouling on inside tube wall by increasing three phase flow shearing stress was presented.The model can be used to study the mechanisms of preventing and cleaning fouling in the three phase circulating fluidized bed evaporator.The individual effects of operational parameters on three-phase flow shearing stress were studied.A saturated bittern solution was chosen as the work material.The fouling period of the saturated bitten could be prolonged effectively by increasing the amount of solid particles. |
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| Keywords: | fluidized bed evaporator preventing and cleaning fouling three-phase flow mixed phase flow |
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