全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

CaSO_4于换热面上结垢过程的控制机理分析

Keywords: CaSO4,结垢,对流传质,表面反应

Full-Text   Cite this paper   Add to My Lib

Abstract:

为了掌握结垢过程的控制机理,通过分析CasO4在换热面上的结垢过程,得到控制结垢过程的阻力关系式.计算结果表明,流速越大,过饱和度越小,结垢过程越易为表面反应所控制.流速越小,过饱和度越大,结垢过程越易为对流传质所控制,且往往发生在液壁温差较大,壁温较高的情况下.垢层生长过程中,在恒壁温条件下,由对流传质与表面反应共同控制的结垢过程转变为只由表面反应控制结垢过程.在恒热流条件下,控制机理没有变化.

References

[1]  STEINHAGEN R, STEINHAGEN H M, MAANI K. Problems and costs due to heat exchanger fouling in New Zealand industries[J]. Heat Transfer Engineering, 1993, 14(1): 19-30.
[2]  LEE S H. A study of physical water treatment technology to mitigate the mineral fouling in heat exchanger [D]. Michigan: Drexel University, 2002.
[3]  RITTER R B. Crystalline fouling studies[J]. Trans ASME, 1983, 105: 374-378.
[4]  NANCOLLAS G H, ERALP A E, GILL S. Calcium sulphate scale formation: a kinetic approach[J]. Soc Petroleum Eng J, 1978, 18: 133-138.
[5]  NAJIBI S H,STEINHAGEN H M,JAMIALAHMADI M.Calcium sulphate scale formation during sub-cooled flow boiling [J].Chem Eng Sci, 1997, 52: 1265-1284.
[6]  HELALIZADEH A, STEINHAGEN H M, JAMIALAHMADI M. Mixed salt crystallisation fouling [J]. Chem Eng Process, 2000, 39: 29-43.
[7]  MARSHAL WL, SLUSHER R. Aqueous systems at high temperature[J]. J Chem Eng Data, 1960, 9: 187-191.
[8]  INCROPERA F P,DEWITT D P. Fundamentals of heat and mass transfer[M]. 4th Edition. New York: Wiley, 1996.
[9]  BOHNET M.Fouling of heat transfer surfaces[J].Chem Eng Tech, 1987, 10: 113-125.
[10]  BIRD R B,STEWART W E,LIGHTFOOD E N. Transport phenomena[M]. New York: Wiley, 1960.
[11]  ANDRITSOS N. Calcium carbonate deposit formation under isothermal conditions[J].The Canadian Journal of Chemical Engineering, 1996, 74: 911-919.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133