20.500.12556/DKUM-40835 Večkriterijsko odločanje pri optimizaciji rekonstruiranega obrata za površinsko zaščito kovin Multicriteria decision-making in optimization of retrofitted plant for metal surface protection V podjetjih kovinsko predelovalne industrije potekajo procesi površinske zaščite kovin, ki obremenjujejo okolje z emisijami hlapnih organskih spojin (HOS). V magistrski nalogi je predlagan pristop za večkriterijsko odločanje pri rekonstrukcijah procesov površinske zaščite z upoštevanjem različnih vidikov BAT tehnik, tj. tehnološkega, ekološkega, ekonomskega, kakovostnega in socialnega vidika. Podjetje, v katerem smo izvajali raziskavo, je v sklopu rekonstrukcije zamenjalo postopek razmaščevanja z uporabo topil s postopkom železo-fosfatiranja. V ta namen je bila zgrajena nova razmaščevalna komora in obstoječa predelana v komoro za konvekcijsko sušenje. Izvedena je bila zamenjava energenta (kurilno olje) z zemeljskim plinom vključno z instalacijo dodatnih cevovodov. Za rekonstruiran proces smo razvili mešano-celoštevilski linearni optimizacijski model, ki optimira porabo surovin, emisije HOS in celotne stroške ob pogoju, da zakonsko predpisana ciljna emisija HOS ni presežena. Optimiran rekonstruiran proces ima za 28 % nižje skupne stroške kot pred rekonstrukcijo in bistveno nižje emisije HOS od ciljnih. Neto sedanja vrednost naložbe je pozitivna in doba vračanja 1,4 leta. Kakovost končnih izdelkov je višja zaradi bistveno izboljšane korozijske obstojnosti. In the metal processing industry, the processes of metal surface protection produce the emissions of volatile organic compounds (VOC) which represent serious environmental burdens. An approach is presented in this Master thesis for multicriteria decision-making in retrofitting the coating processes by taking into account various aspects of BAT techniques, i.e. the technological, ecological, economic, quality, and social aspects. Within the reconstruction process, the company under study has replaced a solvent-based degreasing process by an iron-phosphating process. A new degreasing chamber was built, while the existing one was rebuilt to convective drying chamber. The existing energy source (heating oil) was replaced by natural gas, and the additional pipelines were installed. A Mixed-Integer Linear Programming optimization model was developed for the retrofitted process in order to optimize the consumption of raw materials, VOC emissions, and the total cost, subject to the constraint that the legally prescribed target VOC emission must not be exceeded. The total cost of optimized retrofitted process is 28 % lower than before the reconstruction. VOC emission is considerably lower than the target one. Net present value is positive, while the payback time amounts to 1,4 years. The quality of final products is improved due to the substantially increased corrosion stability. Površinska zaščita kovin emisije hlapne organske spojine mešano-celoštevilsko linearno programiranje. Metal Surface Protection Mixed-Integer Linear Programming Emissions Volatile Organic Compounds. true true false [A. Roter] Slovenski jezik Angleški jezik Magistrsko delo 2013-06-20 16:40:43 2013-07-16 13:58:14 2022-05-03 03:06:27 2021-04-24 03:14:37 2013 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 628.4:551.51:519.852(043) 17015830 URN:SI:UM:DK:DGGYXO5W MAG_Roter_Ambroz_2013.pdf MAG_Roter_Ambroz_2013.pdf 1 B955475614C389A45797B764A0AA3A21 118214cfcd97a002178b02617697fafd85e6561fa6555223d5ba13c804a73676 16f56fc8-7c0a-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=56497 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0