脱硬海水与海水传热系数的对比研究 |
作者:杨雁鸣,马敬环,刘莹 |
单位: 天津工业大学环境与化学工程学院,天津 300160 |
关键词: 海水淡化;脱硬预处理;传热系数;水平管降膜 |
DOI号: |
分类号: TQ021.3 |
出版年,卷(期):页码: 2013,33(4):78-81 |
摘要: |
本文分别用经过脱硬预处理的海水和传统预处理的海水(以下称海水)进行水平管降膜蒸发实验。实验结果表明,在沸点低于70℃时,随着沸点的升高,两者的传热系数都逐渐增大,但脱硬后海水的传热系数略高于海水;在沸点高于70℃时,脱硬后海水的传热系数远远大于海水。也就是说,脱硬后海水可以在高温时也达到很高的传热系数,从而为脱硬预处理与多效蒸发系统相结合提供了实验与设计基础。 |
In this paper, seawater with simple pretreatment and seawater with softening pretreatment were used to horizontal tube falling film evaporation experiments respectively. Experimental results showed that these two heat-transfer coefficients gradually increased with boiling point ,and the heat-transfer coefficient of seawater with softening pretreatment was slightly higher than seawater’s when the boiling point was below 70℃; The heat-transfer coefficient of seawater with softening pretreatment was much higher than the seawater’s when the boiling point was above 70 ℃. In a word, seawater with softening pretreatment could achieve high heat-transfer coefficient at high temperatures. The experiment provided the experimental and designed base for the combination of softening pretreatment and multiple effect evaporation system. |
基金项目: |
全国中小企业创新基金项目(NO.2011-BK120026)资助 |
作者简介: |
杨雁鸣(1988~),女,山西长治人,硕士研究生,从事热膜耦合海水淡化综合利用技术与高含盐废水处理。 E-mail: yanming8871@163.com |
参考文献: |
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