مدل‌های تشکیل رسوب‌ نمکی در مبدل‌های حرارتی و روش‌های رسوب‌زدایی آن

نوع مقاله : مقاله مروری

نویسندگان

دانشگاه تبریز

چکیده

در این‌تحقیق، به بررسی مشکلات رسوب محلول­های نمک، مدل­های بررسی تشکیل رسوب و روش­های رسوب­زدایی این ترکیبات از مبدل­ها پرداخته شد. محلول‌های نمک، به‌طور گسترده‌ای در بسیاری از فن آوری­های صنعتی استفاده می‌شود، لذا محدودیت اصلی معرفی بسیاری از فن­آوری­های بخار- مایع دما بالا1، برای استفاده در محلول­های نمکی، مشکلات ناشی از رسوب آن­ها در مبدل­های حرارتی است. روش­های رسوب­زدایی این سیال­ها شامل رسوب­زدایی برون‌خط و برخط می­باشد که در این بین، هریک دارای معایب و مزایای مخصوص به‌خود است. در عمل، بسته به شرایط مختلف، ضوابط متعددی تعیین‌کنندۀ مزایا و معایب هر یک از روش‌ها است. هم‌چنین کاهش رسوب بر اساس طراحی سیستم مبدل حرارتی، برای این این سیال­ها نیز می­تواند مشکلات ناشی از رسوب را تا حدی برطرف نماید. از روش­های نوین در رسوب­زدایی می­توان به شوک حرارتی، استفاده از پرتابه­ها، جت آب و رسوب­زدایی هیدرومکانیکی اشاره کرد.

کلیدواژه‌ها


عنوان مقاله [English]

Solid Salt Sedimentation in Heat Exchangers and the Sedimented Salt Removing Methods

نویسندگان [English]

  • S. Zeinali Heris
  • M. Norouzi Gaz-koh
University of Tabriz
چکیده [English]

In the present study, the problems of salt solution sedimentation on heat exchangers, their modelling procedure, and the heat exchanger fouling removal methods based on the related published investigation are reported. The salt solutions are used in many technological industries, and the sedimentation of stable salts is the main limitation of using them, especially in the high-temperature liquid-vapor system. The methods of these salts removing is online and offline fouling cleaning. Each of these methods has their advantageous and disadvantageous. In the practical application, there are multiple criteria considering different conditions. Although, based on the heat exchanger design condition, the solid salt sedimentation decrement can be improved the system fouling problems.

کلیدواژه‌ها [English]

  • Heat Exchanger
  • Sediment
  • Offline Fouling Method
  • Online Fouling Method
  • Salt Solution
[1]      Bott, T. R., "Fouling of Heat Exchangers", Elsvier Science Publications, 546 p, (1995),
[2]      McCoy, J. W., "The chemical treatment of cooling water", Chemical Publishing Company, 312 p, (1983).
[3]      Ramesh, K., Sekulic, D. P., "Fundamental of Heat Exchanger Design", John Wiley and Sons Inc, 570 p, (1995).
[4]      Cowan, J. C., Weintritt, D. J., "Water-Formed Scale Deposits", Gulf Publications, 596 p, (2013).
[5]      Misyura, S. Y., Morozov,V. S., Volkov, R. S., Vysokomornaya, O. V., "Temperature and velocity fields inside a hanging droplet of a salt solution at its streamlining by a high-temperature air flow", Int J Heat Mass Transf, 129: 367–379, (2019).
[6]      Shahidzadeh, N., Desarnaud, J., "Damage in porous media: role of the kinetics of salt (re)crystallization", Eur Phys J Appl Phys, 60: 242- 245, (2012).
[7]      Schmid, J., Zarikos, I., Terzis, A., Roth, N., Weigand, B., "Crystallization of urea from an evaporative aqueous solution sessile droplet at sub-boiling temperatures and surfaces with different wettability", Exp Therm Fluid Sci, 91: 80–88, (2018).
 
 
 
[8]      Kuznetsov, G. V., Piskunov, M. V., Volkov, R. S., Strizhak, P. A., "Unsteady temperature fields of evaporating water droplets exposed to conductive, convective and radiative heating", Appl Therm Eng, 131: 340–355, (2018).
[9]      Awad, M. M., "Fouling of heat transfer surfaces", In: Heat transfer- theoretical analysis,experimental investigations and industrial systems, Ed:  Belmiloudi, A, pp: 505-542, (2011).
[10]    Muller-Steinhagen, H., Malayeri, M. R., Watkinson, A. P., "Heat transfer fouling:mitigation and cleaning strategies", Heat Transfer Eng, 26(1):1–4, (2006).
[11]    Wang, Y., "Composite fouling of calcium sulfate and calcium carbonate in a dynamic seawater reverse osmosis unit", thesis of Chemical Engineering and Industrial Chemistry of University of New South Wales ,Sydney, Australia, (2005).
[12]    Hasson, D., Zahavi, J., "Mechanism of calcium sulphate scale deposition on heat transfer surfaces", Ind Eng Chem Fundamen, 9 (1): 1–10, (1970).
[13]    Middis, J., Paul, S. T., Müller-Steinhagen, H., M, Duffy, G. G., "Reduction of heat transfer fouling by the addition of wood pulp fibers", Heat Transfer Eng, 19(2): 36-44, (2007).
[14]    Karabelas, A. J., Yiantsios, S. G., Thonon, B., Grillot, J. M., "Liquid-side fouling of heat exchangers, An integrated R and D approach for conventional and novel designs", Appl, Therm, Eng, 17(8-10): 727-737, (2007).
[15]    Mwaba, M. G., Rindt, C. C., Van-Steenhoven, A. A., Vorstman, M. A. G., "A semi-empirical correlation for crystallization fouling on heat exchange surfaces", Appl, Therm, Eng, 26: 440-447, (2006).
[16]    Kern, D. Q., Seaton, R. A., "A theoretical analysis of thermal surface fouling", Br, Chem, Eng, 4(5): 258–262, (1959).
[17]    Somerscales, E. F. C., "Fundamentals of corrosion fouling", Exp Therm and Fluid Sci, 14(4): 335-355, (1997).
[18]    Muller-Steinhagen, H., Malayeri, M. R., Watkinson, A. P., "Heat exchanger fouling: mitigation and cleaning strategies", Heat Transfer Eng, 32(3–4):189–196, (2011).
[19]    Pogiatzis, T. A., Ishiyama, E. M., Paterson, W. R., Vassiliadis, V. S., Wilson, D. I., "Identifying optimal cleaning cycles for heat exchangers subject to fouling and ageing", Appl Energy, 9: 60–66, (2012).
[20]    Fernandez, S., Pedro, J., Pinar, G., Vicente Quiles, A., GinesnViedma, P. A., "Performance evaluation of a zero-fouling reciprocating scraped-surface heat exchanger", Heat Transfer Eng, 32(3): 331-338, (2011).
[21]    Esawy, M., Malayeri, M. R., Muller-Steinhagen, H., "Crystallization fouling of finned tubes during pool boiling: effect of fin density", J Heat and Mass Transfer, 46: 1167–1176, (2010).
[22]    Klaren, D. G., de Boer, E. F., "Achievements and potential of self- cleaning heat exchangers using untreated natural seawater as a coolant", Proceedings of the ECI Conference on Heat Exchanger Fouling and Cleaning–VII, eds, H, M¨uller-Steinhagen, M, R, Malayeri, and A, P, Watkinson, ECI Symposium Series, vol, RP5, Tomar, Portugal, 262–274, (2007).
[23]    Garrett-Price, B. A., "Fouling of heat exchangers:characteristics, costs, prevention, control and removal", Noyes Publications, Park Ridge, New Jersey, (1985).
[24]    Muller-Steinhagen, H., Malayeri, M. R., Watkinson, A. P., "Recent advances in heat exchanger fouling research, mitigation, and cleaning techniques", Heat Transfer Eng, 28(3): 173-176, (2007).
[25]    Wiehe, I. A., "The oil compatibility model and crude oil compatibility", Energ Fuel, 14: 56–59, (2000).
[26]    Evangelidou, M., "Crystallization fouling of structured tubes during pool boiling heat transfer", Diploma thesis, University of Stuttgart, Stuttgart, Germany, (2010).
[27]    Waite, T. D., Fagan, J. R., "Summary of biofouling control alternatives", in Condenser Biofouling Control, ed, J, Garey, AnnArbor Science, AnnArbor, MI, (1980).
[28]    Ferreira, C. M., Simoes, M. C., Pereira, M. S., Bastos, O. C., Nunes, M., Coelho, L. F. M., "Control of biofouling of industrial surfaces using microparticles carrying a biocide", Proceedings of EUROTHERM International Conference on Heat Exchanger Fouling and Cleaning VIII– 2009, eds, H, M¨uller-Steinhagen, M, R, Malayeri, and A, P, Watkinson, Schladming, Austria, June 14–19, 378–383, (2009).
[29]    Hamed, O. A., Mardouf, K. B., Al-Omran, A., "Impact of interruption of antiscalant dosing or cleaning balls circulation during MSF plant operation", Desalination, 208: 192–203, (2007).
[30]    Al-Bakeri, F., El Hares, H., "Optimization of sponge ball cleaning system operation and design in MSF plants", Desalination, 92: 353–375, (2013).
[31]    Malayeri, M. R., Jalalirad, M. R., "Abatement of deposit formation in aqueous systems using various projectiles", Desalin Water Treat, 55(11): 2931-2938, (2014).
[32]    Malayeri, M. R., Jalalirad, M. R., "Mitigation of crystallization fouling in a single heated tube using projectiles of different sizes and hardness", Heat Transfer Eng, 35 (16-17): 1418-1426, (2014).
[33]    Jalalirad, M. R., Malayeri, M. R., "A criterion for the selection of projectiles for cleaning tubular heat exchangers", in: M,R, Malayeri, H, Muller- Steinhagen, A,P, atkinson (Eds,), Proceedings of the International Conference on Heat Exchanger Fouling and Cleaning, 332–338, (2013).
[34]    Jalalirad, M. R., Malayeri, M. R., "Preimesser, on-line cleaning of tubular heat exchangers in water service systems using projectiles", Desalin Water Treat, 51: 780–785, (2013).
[35]    Abd-Elhady, M. S., Jalalirad, M. R., Malayeri, M. R., "Optimum rate of injection of spherical projectiles in tubular heat exchangers", in: M,R, Malayeri, H, Müller-Steinhagen, A,P, Watkinson (Eds,), Proceedings of the Eurotherm International Conference on Heat Exchanger Fouling and Cleaning, Budapest, Hungary,339–345, June 9–14, (2013).