May 26, 2019   3:19 a.m. Dušan
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Bc. Patrik Furda
Identification number: 82077
University e-mail: xfurdap [at] stuba.sk
 
2831T00  Chemical Engineering I-CHEI
FCFT I-CHEI den [term 2, year 1]
Master type of study, full-time, attendance method form
1st year of study / 2nd semester of study
Study group no.: 36

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Basic information

Basic information about a final thesis

Type of thesis: Bachelor thesis
Thesis title:Proposal of Model Fluid Catalytic Cracking Unit Energy System
Written by (author): Bc. Patrik Furda
Department: Institute of Chemical and Environmental Engineering (FCFT)
Thesis supervisor: Ing. Miroslav Variny, PhD.
Opponent:Ing. Ján Janošovský, PhD.
Final thesis progress:Final thesis was successfully defended.


Additional information

Additional information about the final thesis follows. Click on the language link to display the information in the desired language.

Language of final thesis:Slovak

Slovak        English

Title of the thesis:Proposal of Model Fluid Catalytic Cracking Unit Energy System
Summary:The Fluid Catalytic Cracking Unit (FCC) belongs to the most important units in a standard refinery. The unit converts heavier feedstock from prevenient processing while producing a wide range of products, of which gasoline, C3 and C4 fraction rank as the most important. Amongst the general characteristics of a FCC unit belong high energetic requirements in means of power input for compression units as well as production of significant amounts of latent heat contained in products. This heat is mostly utilized in production of superheated 3,5 MPa 350 °C steam which is subsequently used in powering of the main compression units. The main aim of this thesis is to formulate a complex, flexible and reliable mathematic model primarily able to provide information on the material flows' properties, main compression units' power input and the FCC unit's steam generation capacity with the unit operating at design operation parameters and secondly able to evaluate the impact of alteration of the operation parameters on the unit's superheated steam production and consumption and thus to assess whether it is necessary to import the steam from the steam network or whether it is possible to operate as a steam exporter. Using the proposed mathematic model a case study was realized. The study analyzed the changes in steam production and consumption with the feedstock ranging from 85 t/h to 135 t/h and reactor temperature ranging from 520 °C to 550 °C. Results of the study express the possibility of exporting 6 t/h of superheated stream to the steam network in a wide range of operation parameters. Thus the FCC unit can be considered a stable superheated steam exporter. In favour of economization of the steam production a heat exchanger improvement was proposed according to the results provided by the mathematic model. The heat exchanger would preheat supply water utilizing the latent heat of products. This proposal expects a capital expense of 510 000 € and payback period of less than three years.
Key words:compression unit power input, mathematic model, superheated steam

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