| 海水冷却水析晶污垢分析及其生长模型 |
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| 引用本文： | 杨大章,柳建华,鄂晓雪,姜林林.海水冷却水析晶污垢分析及其生长模型[J].化工进展,2015,34(8):3179-3182. |
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| 作者姓名： | 杨大章 柳建华 鄂晓雪 姜林林 |
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| 作者单位： | 1.上海理工大学能源与动力工程学院, 上海 200093;2.上海市动力工程多相流动与传热重点实验室, 上海 200093 |
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| 基金项目： | 上海市教育委员会重点学科资助项目，上海市科委建设项目(13DZ2260900)。 |
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| 摘 要： | 海水冷却水广泛应用于沿海地区的石油、化工、电力和船舶领域,但是海水容易引起严重的析晶结垢,从而降低换热效率和运行能耗。本文对海水析晶污垢的形成过程进行了静态实验研究,通过XRD分析了海水析晶污垢的组成,结果显示污垢主要成分为CaSO4·2H2O和Mg(OH)2。本文提出了海水析晶污垢的生长模型,推导了污垢生长曲线关联式m=ke-bt+M0,拟合了80℃时不同表面粗糙度试片的海水析晶污垢生长关联式和生长曲线,拟合最大相对误差15.7%。海水析晶污垢生长关联式和生长曲线显示,海水析晶结垢的诱导期、污垢生长速率和结垢量与海水中成垢离子的晶体生长活化能、过饱和度以及换热试片的表面粗糙度有关,试片的粗糙度越小,海水析晶结垢的诱导期越长,生长速率越慢。
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| 关 键 词： | 结晶 结垢 动力学模型 海水 |
| 收稿时间： | 2015-01-12 |
Composition analysis and kinetic modeling of crystallization fouling in cooling seawater |
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| YANG Dazhang,LIU Jianhua,E Xiaoxue,JIANG Linlin.Composition analysis and kinetic modeling of crystallization fouling in cooling seawater[J].Chemical Industry and Engineering Progress,2015,34(8):3179-3182. |
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| Authors: | YANG Dazhang LIU Jianhua E Xiaoxue JIANG Linlin |
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| Affiliation: | 1 School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;2 Shanghai Key Laboratory of Multiphase Flow and Heat Transfer of Power Engineering, Shanghai 200093, China |
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| Abstract: | Cooling seawater is used generally in petrochemical industry, power generation and shipping, however crystallization fouling of seawater would deteriorate heat transfer and increase energy consumption. The experiments of crystallization-fouling by seawater were conducted under static condition. The crystallization fouling composition was analyzed by XRD, and the results showed that seawater fouling was CaSO4·2H2O and Mg(OH)2. A crystallization-fouling growth model was proposed as m=ke-bt+M0, and the experimental data of different roughness metal at 80℃ was fitted to the correlation with maximum relative error of 15.7%. The crystallization-fouling correlation and the growth curve showed that induction period, growth rate and mass of seawater crystallization-fouling were closely related to fouling-ions properties, super-saturation and metal surface roughness. When roughness of metal decreased, induction period of crystallization fouling became longer and grown rate became lower. |
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| Keywords: | crystallization fouling kinetic modeling seawater |
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