Uređaj za vađenje šljunka iz filtra pročistača vode

Igrec, Ivan (2018) Uređaj za vađenje šljunka iz filtra pročistača vode. = Device for extraction of gravel from water purifier filter. Master's thesis (Bologna) , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Kostelac, Milan.

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Abstract (Croatian)

U Sisačko-moslavačkoj županiji, u gradu Petrinji nalazi se postrojenje tvrtke Vodoopskrba Kupa d.o.o. za filtriranje vode rijeke Kupe radi potrebe dobivanja pitke vode za opskrbu stanovništva gradova Siska, Petrinje i okolice. U postrojenju, u hali za filtriranje nalazi se 8 gravitacijskih pješčanih filtara (bazena), gdje se voda filtrira kroz sloj kvarcnog pijeska debljine 1 m. Izmjena pijeska trenutačno se obavlja ručnim izvlačenjem tj. uvlačenjem pijeska kolicima, pri čemu je postupak izmjene pijeska dosta spor. Cilj koji je postavljen na ovaj rad jest pronalaženje tehničkog rješenja uređaja za vađenje pijeska tj. nasipavanje novog pijeska kojim bi se smanjio fizički rad te ubrzala izmjena pijeska. U radu je razrađeno i konstruirano tehničko rješenje uređaja za vađenje iskorištenog pijeska iz mehaničkog bazenskog filtra te njegovo premještanje do vanjskog deponija. Također ponuđenim rješenjima pretpostavljeno je i dopremanje novog pijeska do bazenskog filtra te način usipavanja i raspodjele u bazen. Određen je i način premještanja uređaja između 8 filtracijskih bazena u hali. U 2. poglavlju rada opisan je postupak dobivanje pitke vode u postrojenju tvrtke Vodoopskrba Kupa d.o.o. te je predstavljeno samo postrojenje. U 3. poglavlju detaljno su definirani filtracijski bazeni i hala u kojoj su bazeni smješteni, nacrtani su bazeni i prikazane su sve bitne dimenzije i prostor koji stoji na raspolaganju za izvedbu budućeg konstrukcijskog rješenja. U 4. poglavlju definiran je cilj rada te su opisani zahtjevi na konstrukciju. Dodatno predstavljena su potencijalna mjesta za smještaj uređaja. U 5. poglavlju opisani su i predstavljeni transportni elementi i uređaji koji bi mogli biti korišteni konačnim tehničkim rješenjem. U 6. poglavlju predstavljeni su koncepti (moguća rješenja) za izvedbu uređaja za vađenje pijeska. U radu je predstavljeno 7 koncepata, te se na koncu odabrao koncept koji je najbolje odgovarao nametnutim zahtjevima. U 7. poglavlju izvršen je odabir koncepata, te je predstavljeno konačno rješenje konstrukcije uređaja i opisan njegov način funkcioniranja. U 8. Poglavlju izvršen je kontrolni proračun elemenata konstrukcije uređaja. Prikazani su svi dijelovi od kojih je uređaj sastavljen te je opisan način funkcioniranja, podešavanja i premještanja konstrukcije. Pojedini elementi konstrukcije kontrolirani su pomoću metode konačnih elemenata u programskom paketu Abaqus. U sklopu rada nacrtani su CAD modeli pomoću programa Catia V5, te je napravljena sklopna tehnička dokumentacija.

Abstract

The filtration plant of the water company Vodoopskrba Kupa d.o.o. that supplies the cities Sisak and Petrinja (Croatia) and their surroundings with potable water is located in Petrinja in the Sisak - Moslavina County. The filtration room within the plant contains eight gravity sand filters (basins) where the water is filtered by passing through one meter thick layer of quartz sand. The process of replacing the sand is currently done manually and therefore is slow and inefficient. The old and new sand are transported by means of trolleys. The main aim of this project is the development of a technical solution and the mechanism for replacing the filter media (sand) so as to reduce the physical work of the maintenance crew and to speed up the process.As a part of this project, the mechanism for replacing the sand has been developed. It enables the old sand to be extracted from the mechanical filter and conveyed to the nearby dumping ground while the new sand is delivered and distributed to the basin of the filter. This thesis provides a detail description of the steps involved in the design process, seven conceptual solutions were taken into account. Each of them has been elaborated and discussed and as a result, the best solution, that proceeded with detail design, was chosen. As the final outcome of the project, a technical solution for the replacing sand mechanism was proposed. Furthermore, the benefits, as well as disadvantages of the proposed solution, are discussed. As a part of the thesis, a way of transporting the mechanism between filter basins was also determined. Finally, comprehensive technical drawings were produced and can be found in the appendix of this manuscript.Chapter two gives a brief description of the water treatment plant and explains in detail the water purification process of the plant. Filter basins and the room where they are located are thoroughly defined in chapter three. This chapter also contains technical sketches of basins as well as the drawing of the space available for the mechanism. All essential dimensions are provided in these sketches. Chapter four outlines the main objective of this project and summarises the design requirements. Additionally, this chapter discusses several potentially suitable locations to position the mechanism. Transport features and equipment are introduced in chapter five where every potential piece of equipment used in the design is explained in detail.Seven conceptual designs, that are discussed in subsequent two chapters, were developed for this project. Based on the given requirements, the most suitable conceptual design was finally chosen in chapter 7. This chapter also contains detail description and the basic working principle of the chosen technical solution.Mathematical modelling and control calculations are described in chapter eight. All assembly parts are shown here along with working principle, adjustment and transportation methods of the mechanism that are also described in this chapter. All calculations are conducted analytically in a semi-empirical manner. The structural strength of some design features was calculated numerically using the commercial finite element method (FEM) based software ABAQUS. All CAD models and comprehensive technical documentation were produced in CATIA V5.

Item Type: Thesis (Master's thesis (Bologna))
Uncontrolled Keywords: trakasti transporter; spremnik pijeska; filtracijski bazen
Keywords (Croatian): belt conveyor; sand tank; water purifier pool
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 400 Department of IC Engines and Mechanical Handling Equipment > 430 Chair of Track-guided Rail and Levitated Vehicles
Date Deposited: 09 Jul 2018 06:42
Last Modified: 23 Jul 2018 09:10
URI: http://repozitorij.fsb.hr/id/eprint/8623

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