采用填料强化的鼓泡塔直接接触换热性能研究

摘要

以正戊烷-水为物系，进行了采用填料强化的鼓泡塔直接接触蒸发换热实验。实验采用顺流操作，考察了分散相流量、温差以及分布器孔径对体积换热系数和汽化高度的影响。实验得出：在戊烷流量为23.868 L/h，分布器孔径为2.5 mm时加填料的鼓泡塔的体积换热系数约为未加填料的2倍；在一定的操作条件下，加填料的鼓泡塔中汽化高度随分散相流量和分布器孔径的增大而增加，随温差的增大而减小；加填料的鼓泡塔中体积换热系数随分散相流量的增加而增加，随分布器孔径的增大而减小，与温差成负幂指数关系。

	Service

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	Email Alert
	RSS
	作者相关文章
	魏世超
	黄群武
	蒋丽红
	王一平
	付海玲

关键词：直接接触式换热；填料；体积换热系数；汽化高度

Abstract：

An experiment was carried out to study direct contact evaporative heat transfer performance with n-pentane and water in spray column with packing. Downstream operation was applied. The effects of pentane flow rate, temperature difference and distributor aperture on volumetric heat transfer coefficient and evaporative height were investigated. The results show that volumetric heat transfer coefficient in spray column with packing is twice as much as that without packing when pentane flow rate of 23.868 L/h and distributor aperture of 2.5 mm. Besides, evaporative height with packing increases with an increase of pentane flow rate and aperture distributor, a decrease of temperature difference. Volumetric heat transfer coefficient with packing increases with pentane flow rate increasing, distributor aperture reducing and has an exponential relation with temperature difference.

Keywords： direct contact heat transfer； packing； volumetric heat transfer coefficient； evaporative height

Received 2015-03-03;

Corresponding Authors: 黄群武,E-mail:huangqw@tju.edu.cn。 Email: huangqw@tju.edu.cn

About author: 魏世超(1988-),男,硕士研究生,研究方向为多相流动和传热、太阳能利用技术。

引用本文:

魏世超, 黄群武, 蒋丽红, 王一平, 付海玲.采用填料强化的鼓泡塔直接接触换热性能研究[J]. 化学工业与工程, 2017,34(1): 84-89

Wei Shichao, Huang Qunwu, Jiang Lihong, Wang Yiping, Fu Hailing.Direct Contact Heat Transfer Performance in Spray Column with Packing[J]. Chemcial Industry and Engineering, 2017,34(1): 84-89

[1] 章学来, 卢家才,李瑞阳, 等. 直接接触式换热技术的研究进展[J]. 能源技术, 2001, 22(1):1-5 Zhang Xulai, Lu Jiacai, Li Ruiyang, et al. The research advancement of direct contact heat transfer technology[J]. Energy Technology, 2001, 22(1):1-5(in Chinese)
[2] 章学来, 卢家才, 李瑞阳, 等. 直接接触式换热技术的研究进展(续)[J]. 能源技术, 2001, 22(2):53-55 Zhang Xuelai, Lu Jiacai, Li Ruiyang, et al. The research advancement of direct contact heat transfer technology[J]. Energy Technology, 2001, 22(2):53-55(in Chinese)
[3] 靳登超, 王双平, 夏玉莲. 不互溶液体间直接接触传热的研究进展[J]. 化学工业与工程, 2009, 26(6):542-546 Jing Dengchao, Wang Shuangping, Xia Yulian. Progress in direct-contact heat transfer between immiscible liquids[J]. Chemical Industry and Engineering, 2009, 26(6):543-546(in Chinese)
[4] Sideman S, Gat Y. Direct contact heat transfer with change of phase:Spray-Column studies of a three-phase heat exchanger[J]. AIChE Journal, 1966,12(2):296-303
[5] Sideman S, Isenberg J. Direct contact heat transfer with change of phase:Bubble growth in three-phase systems[J]. Desalination, 1967, 2(2):207-214
[6] Song M, Steiff A, Weinspach P M. Nusselt number for direct contact evaporation of a moving ellipsoidal drop in an immiscible liquid[J]. Chemical Engineering Communications, 1996, 145(1):73-87
[7] Song M, Steiff A, Weinspach P M. Parametric analysis of direct contact evaporation process in a bubble column[J]. International Journal of Heat and Mass Transfer, 1998, 41(12):1749-1758
[8] Song M, Steiff A, Weinspach P M. Direct-Contact heat transfer with change of phase:A population balance mode[J]. Chemical Engineering Science, 1999, 54(17):3861-3871
[9] Siqueiros J, Bonilla O. An experimental study of a three-phase, direct-contact heat exchanger[J]. Applied Thermal Engineering, 1999, 19(5):477-493
[10] Celata G P, Cumo M, D'Annibale F, et al. Direct contact evaporation of nearly saturated R114 in water[J]. International Journal of Multiphase Flow, 1996, 38(8):1495-1504
[11] Robert F B. Direct-Contact heat transfer[C]//Adrian Bejan and Allan D. Kraus. Heat transfer handbook. NewYork:Wiley-Interscience, 2003
[12] Li Y, Klausner J F, Mei R, et al. Direct contact condensation in packed beds[J]. International Journal of Heat & Mass Transfer, 2006, 49(25):4751-4761
[13] Alnaimat F, Klausner J F, Mei R. Transient analysis of direct contact evaporation and condensation within packed beds[J]. International Journal of Heat and Mass Transfer, 2011, 54:3381-3393
[14] Sideman S, Hirsch G, Gat Y. Direct contact heat transfer with change of phase:Effect of the initial drop size in three-phase heat exchangers[J]. A1ChE Journal, 1965, 11(6):1081-1087
[15] Seetharamu K N, Battya P. Direct contact evaporation between two immiscible liquids in a spray column[J]. Journal of Heat Transfer, 1989, 111(3):780-785