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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Dijagnostika oštećenja i procena preostalog životnog veka cevi etilenskih peći / Failure diagnostics and remaining lifeprediction of ethylene furnace tube

Kucora Ištvan 29 September 2016 (has links)
<p>Disertacija je posvećena problemima<br />o&scaron;tećenja cevi pirolitičkih peći u fabrici etilena,<br />kao i metodima procene preostalog ţivotnog<br />veka cevi peći, uop&scaron;tava teorijska i praktična<br />istraţivanja koja su sprovedena za vreme<br />trajanja doktorskih studija.<br />Peć za pirolizu benzina je uzeta kao tipičan<br />primer za proučavanje preostalog ţivotnog veka<br />na osnovu prikupljenih podataka o cevima peći,<br />kao &scaron;to su: redukcija debljine zida, povećanje<br />spoljnjeg prečnika, tvrdoća i metalografska<br />istraţivanja, itd., a eksperimentalni rezultati su<br />dobiveni iz pripremljenih isečaka cevi peći.<br />Razmatra se veliki kompleks pitanja povezan<br />sa problemom tačnosti procene ţivotnog veka.<br />Iako otkaz cevi peći nije veliki bezbednosni<br />problem, procena preostalog ţivotnog veka cevi<br />je značajna zbog u&scaron;tede tro&scaron;kova koji proizilaze<br />iz optimizacije procesnih parametara ili<br />redukcije frekvence ispitivanja i prevazilaţenja<br />neplaniranih zastoja.</p> / <p>The dissertation is devoted to<br />problems of pyrolysis furnace tubes<br />damage in ethylene plant, and methods of<br />assessment of the furnace tube remaining<br />life, generalizes the theoretical and<br />practical research that is conducted during<br />the doctoral studies.<br />Furnace for the gasoline pyrolysisis<br />taken as a typical example for the study of<br />the remaining life based on data collected<br />on the furnace tube, such as the reduction<br />of wall thickness, increasing the outer<br />diameter, hardness and metallographic<br />testing, etc.., and experimental results<br />were obtained from prepared furnace tube<br />slices.<br />Discusses the major issues associated<br />with the complex problem of the accuracy<br />of life expectancy. Although furnace tube<br />failure isn&rsquo;t a major security problem, the<br />tube remaining life estimation is important<br />because of cost savings resulting from the<br />optimization of process parameters or<br />reducing the frequency of tests and<br />overcome unplanned downtime.</p>

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