| 氯化铵回收的三效降膜蒸发系统的(火用)分析 |
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| 引用本文： | 郑艳梅,韩郁林,李鑫钢,赵景利.氯化铵回收的三效降膜蒸发系统的(火用)分析[J].天津大学学报(自然科学与工程技术版),2007,40(3):377-380. |
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| 作者姓名： | 郑艳梅 韩郁林 李鑫钢 赵景利 |
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| 作者单位： | [1]天津大学化工学院精馏技术国家工程研究中心,天津300072 [2]中国华北石油管理局计量中心站,河北任丘062552 [3]河北工业大学化工学院,天津300130 |
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| 摘 要： | 利用黑箱和灰箱模型对氯化铵回收三效降膜蒸发系统进行了火用]分析，找到了系统火用]损的关键，即二次蒸汽的消耗引起的外部火用]损．对各效蒸发器采用白箱模型，分析了蒸发器火用]损的主要环节，结果表明，对于一、二、三效蒸发器，传热温差引起的火用]损率分别为77．64％、68．59％和75．87％，降低传热温差引起的火用]损是提高蒸发系统效率的主要途径．由于浓缩热引起的火用]损也是不容忽视的，应提高系统的真空度，采用低温蒸发路线．
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| 关 键 词： | 降膜蒸发系统 [火用]分析 氯化铵回收 |
| 文章编号： | 0493-2137（2007）03-0377-04 |
| 修稿时间： | 2006-11-082006-12-20 |
Exergy Analysis of Three-Effect Falling-Film Evaporation System for Ammonium Chloride Recycle |
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| ZHENG Yan-mei,HAN Yu-lin,LI Xin-gang,ZHAO Jing-li.Exergy Analysis of Three-Effect Falling-Film Evaporation System for Ammonium Chloride Recycle[J].Journal of Tianjin University(Science and Technology),2007,40(3):377-380. |
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| Authors: | ZHENG Yan-mei HAN Yu-lin LI Xin-gang ZHAO Jing-li |
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| Institution: | 1. National Engineering Research Center for Distillation Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; 2. China National Petroleum Corporation Huabei Petroleum General Measure Station, Hebei Renqiu 062552, China;3. School of Chemical Engineering and Technology, Hebei Technology University, Tianjin 300130, China |
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| Abstract: | Through the exergy analysis of three-effect falling-film evaporation system for ammonium chloride recycle by black box model and grey box model, the main links losing exergy most were found. The external losing exergy mainly concentrated on the consumption of secondary steam. The main links of losing exergy was analyzed by white box model in each evaporator. The results indicate that the losing exergy rates caused by the difference in temperature heat transfer were 77.64%,68.59% and 75.87%, in the first, second and third evaporator, respectively. The method to increase efficiency of evaporation system is to reduce the losing exergy of the difference in temperature heat transfer. As the concentrated heat can also cause the losing exergy, the vacuum degree should be increased and the evaporation system should operate in low temperature condition. |
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| Keywords: | falling-film evaporation system exergy analysis ammonium chloride recycle |
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