Of such factors some may be related to the feed properties such as its chemical nature, density, viscosity, diffusivity, pour and cloud. In industry, periodic heat exchanger cleaning is the most effective and widely used mitigation technique. Expresstm, novel heat exchanger analysis software for heat exchanger fouling in the preheat train of a crude oil distillation unit. It has extensive domestic and industrial applications. Uop and ucl are compared, using equation 1, to estimate the real time fouling factor for each heat exchanger. Refereed proceedings 2011 heat exchanger fouling and cleaning. The conference is intended to facilitate innovative thinking and to explore theoretical and practical approaches to address the challenges associated with heat exchanger fouling. Industrial perspective on fouling research fouling mitigation. Fouling mitigation and cleaning chemical, mechanical and physical techniques. The course will provide details on the maintenance aspects of several heat exchanger types in relation to process and mechanical design. Fouling of heat exchangers in processing industries is a chronic operating problem.
Fouling mitigation using helixchanger heat exchangers. Since 90% of refinery fouling is caused by only six basic causes, most fouling causes can be quickly identified by using tests or indicators for the diagnosis and investigation steps. The main objective of this work is to develop a semiempirical model for heat exchanger fouling the available experimental data are analyzed and then used to establish the proposed model. On the other side, a very frequent cleaning of heat exchanger can be much costly in maintenance and lost of production. For example, fouling in crude oil exchangers affected by the following variables. While the general fouling mitigation strategy will solve any refinery fouling problem, it makes sense to keep in mind the most common causes. The same can be done for the heat load, giving the heat exchanger efficiency, as defined in equation 2. Heat exchanger fouling and cleaning vii, july 1 6, 2007, tomar, portugal also, an output information template is filled up with the results of the execution to be retrieved.
Industrial heat exchanger operation and maintenanceto minimize fouling and corrosion 3 easy steps to complete the course. This handbook presents the most important technologies concerning the reduction of fouling in heat exchangers and the appropriate technologies of removal and cleaning. Heat exchanger fouling and estimation of remaining useful life. Keeping heat exchanger tubes continuously clean and providing optimal heat exchange maintains process ef. Fouling is usually distinguished from other surfacegrowth phenomena in that it occurs on a surface of a component, system, or plant performing a defined and useful function and that. Fouling resistances imply a higher heat transfer area needed in the design to guarantee that the heat exchanger will attain the needed heat load according to the process specifications during the entire period between cleaning shutdowns. If the fouling resistance presents an asymptotic page 5 of 35 acs paragon plus environment. Fouling is the accumulation of unwanted material on solid surfaces to the detriment of function. Heat exchanger fouling and cleaning conference 2017. Online cleaning technique for mitigation of biofouling in heat. Have you ever considered to apply ultrasonic scale preventer to remove and prevent fouling in heat exchanger. In contrast, efficient mechanical and chemical fouling mitigation and cleaning techniques have found their way into regular plant operation through a mainly. Dear friends and colleagues of the heat transfer fouling community.
For that, a followup on the fouling resistance in heat. Influence of fouling on heat exchanger effectiveness in a. Oily wastewater is also generated during heat exchanger cleaning. The initiation period and the roughness delay time for particulate fouling are very small 4. Fouling and fouling mitigation on heat exchanger surfaces 511 surface reacts with the fluid and become corro ded 15. In this way, an accurate optimization technique of cleaning.
Paul watkinson, engineering conferences international, kloster irsee, germany, june 5 10, 2005. Costs due to overdesign, additional fuel consumption and maintenance, loss of production, etc. This handbook presents, now in the 2nd completely worked over and enlarged edition, the most important technologies concerning the reduction of fouling in heat exchangers beginning with constructional disposition, prevention measures and the appropriate technologies of removal and cleaning. The proceedings cover various aspects of heat exchanger fouling along with updated stateofart fouling mitigation and cleaning strategies.
However these are still some probelms in cost, shut down for cleaning and environmental matters. Wilson memberdepartment of chemical engineering, university of cambridge, uk british sugar, bury st edmunds, ukfouling of heat exchangers in the food. Due to the custom nature of all xchanger heat exchangers, this manual discusses the characteristics and procedures that are common to all exchangers. Cost effective fouling control in cooling water intake systems with environmental and operational benefits. Visit for state specific information including ohios required. Warranty and service contact information is also included. Spirelf, online mechanical cleaning omc and turbulence promonotion devices 158 turbotal, turbotal. The present eproceedings as well as those from the previous conference in 2003 can be obtained free of charge from the following homepage of engineering conferences international symposium series. Now, 2 months after we cleaned it up, we are noticing. Aa, bg, c, d, hp, hr, lc, and tv series heat exchangers. This unique and comprehensive text considers all aspects of heat exchanger fouling from the basic science of how surfaces become fouled to very practical ways of mitigating the problem and from mathematical modelling of different fouling mechanisms to practical methods of heat exchanger cleaning.
Particulate fouling effect on heat exchanger performance. Fouling mitigation using helixchanger heat exchangers bashir i. Extensive technical literature is available on heat exchanger design, operation and maintenance, but it is widely scattered throughout the industrial bulletins, industrial design codes and standard, technical journals, etc. Heat exchanger fouling problem refining, hydrocarbons. Such as, pres ence of sulfur in fuel can cause corrosion in. A mechanical device for continous online mitigation 166 of tubular heat exchanger fouling 3. And the heat exchanger plate is the core component of the heat exchanger, if the cleaning methods are not scientific, it will directly cause various economic losses, and even malignant accidents may be happened. Study of the fouling deposit in the heat exchangers of. In tube self cleaning heat exchanger ballbrush type cleaning systems. Volume 32, 2011 issue 34 submit an article journal homepage. Kazi and others published fouling and fouling mitigation on heat exchanger surfaces find, read and cite all the research you need on researchgate.
The fouling materials can consist of either living organisms or a nonliving substance inorganic andor organic. The factors that govern fouling in heat exchangers are many and varied. Heat exchanger fouling mitigation and cleaning technologies. On the other side, a very frequent cleaning of heat exchanger can be much. The decreasing price of oil and the increasing cost of energy force engineers to continuously face the challenges of designing highly effective equipment, developing innovative enhancements for heat transfer, and reducing equipment size. Physical water treatment for the mitigation of mineral fouling in coolingtower water applications, young i. The cleaning agent and corrosion inhibitor should be selected according to the material of heat exchanger and the chemical cleaning agent should be determined. Heat exchanger fouling and estimation of remaining useful life tutpol ardsomang1, j. Pdf fouling and fouling mitigation on heat exchanger. Fouling is a resistance to energy transfer between fluids in pro cess equipment 1.
In most industrial fields, lots of trial for fouling removal has been focused to chemical methods and some of trials had good results. This conference provides a collaborative forum for addressing the tremendous challenges engineers face due to the fouling of heat exchangers. It reduces the heat recovery and restricts the fluid flow in a heat exchanger by. Increasing the heat transfer area of the heat exchanger. Proven dramatic results show it can help companies save thousands of hours of cleaning and millions of dollars in costs every year. Generally speaking, heat exchangers are liable to fouling where the unwanted deposition of microorganisms severely deteriorates heat transfer performance. Heat exchanger fouling and cleaning conference series. Heat exchanger fouling and cleaning challenges and opportunities. After 7 successful conferences on heat exchanger fouling and cleaning organised through engineering conference international eci in california 1995, italy 1997, canada 1999, switzerland 2001, new mexico 2003, germany 2005 and portugal 2007, we have decided to take on the administration of the. Chemical fouling cleaning chemical fouling cleaning is to add acids or alkalis into the fluids to minish the adhesive force between fouling and surface so as to remove the fouling. Heat exchanger fouling problem posted in refining, hydrocarbons, oil, and gas.
Petrosync heat exchanger fouling mitigation technology. The problems that restrict the efficient operation of equipment are described and the costs. Cleaning schedule optimization of heat exchanger networks. Fundamentals and applications 2003 santa fe, new mexico, usa 18 22 may 2003. However, the changes in the operating conditions requires to reducing the propensity of fouling involved, in most cases, a reduction in the amount of heat. Written by experts from germany, uk and the usa, this book is a reliable adviser for engineers, managers, technicians and students who want to. Furthermore, the general and scientific fundamentals of heat transfer are explained. Technologies for biofouling control and monitoring in desalination. Heat exchangers play a crucial role in most chemical, food processing and power generating processes. If heat exchanger tubes surfaces resisted fouling or could be cleaned during operation, significant reductions in green gas emissions, water and cost could be achieved. Heat exchanger is equipment used to transfer heat from one fluid to another. The calculation of the calenderandtube heat exchanger is based on empirical models validated on the laboratory scale. Heat exchanger fouling and cleaning challenges and. The corrosion products can foul the surface provided it is not dissolved in the solu tion after formation.
Fouling and fouling mitigation on heat exchanger surfaces. It was developed over a period of more than five years in close collaboration with the oil industry fouling working party, a team of oil refiners, heat transfer equipment manufacturers and chemical suppliers. In fact, fouling has been recognised for a in fact, fouling has been recognised for a long time, and research on heat exchanger fo uling was. Fouling and fouling mitigation on heat exchanger surfaces 509 fig. Optimization of operating conditions for mitigating. Fouling during the use of seawater as coolant the development of a user guide, s. Heat exchanger fouling and cleaning the conference. Optimization of scheduling of cleaning in heat exchanger. Over 90% of all heat exchangers suffer from fouling. This model accounts for the effects of flow conditions on fouling. However, when doing an extrapolation at industrial scale, errors become significant because of the nonlinearities of the thermophysical properties and the transfer coefficients along the heat exchanger. The fouling mitigation strategy proposed in this work is able to reduce the severity of the fouling process by changing the operating conditions of the affected heat exchanger networks. Plate heat exchanger cleaning service provider hfm. Deposition process fouling in a waterintube heat exchanger.
765 469 1288 607 1155 122 1157 1465 1199 519 1335 537 1001 342 1419 997 1231 1514 1119 1089 795 667 458 404 1081 724 893 237 628 872 649