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International Society for Industrial Process Tomography

8th World Congress on Industrial Process Tomography

A CAD Pilot Unit Design and Simulation of Circulating Two Phase Flow for Parameters Determinetion by Gamma Transmission Measurements

Vieira E. Bertony1*, Barbosa E. Santos2, Dantas C.C1, Cruz Filho A.J.1, Moura A.E.1, Silvio B. Melo1, Emerson A. O. Lima3

1* Department of Nuclear Energy, Federal University of Pernambuco - UFPE, Recife, PE, Brazil eudes.bertony.vieira@hotmail.com

1 Department of Nuclear Energy, Federal University of Pernambuco - UFPE, Recife, PE, Brazil ccd@ufpe.br

1 Department of Nuclear Energy, Federal University of Pernambuco - UFPE, Recife, PE, Brazil antonio.jcf.@gmail.com

1 Department of Nuclear Energy, Federal University of Pernambuco - UFPE, Recife, PE, Brazil alexelton@gmail.com

1 Federal University of Pernambuco - UFPE, Recife, PE, Brazil sbm@sin.ufpe.br

2 Federal University of Paraíba - UFPB, Campina Grande, PB, Brazil enivaldo.santos@ufcg.edu.br

3 State University of Pernambuco - UPE, Recife, PE, Brazil emathematics@gmail.com

ABSTRACT

The velocity distribution of the two phase flow air and FCC – Fluid Catalytic Cracking catalyst along riser was simulated in 3D pilot unit design. The pilot cold FCC type unit was brought into a Solidworks 3D CAD – Computed Aided Design environment and flow simulation by accessing CFD – Computational Fluid Dynamic analysis capability of this software. Experimental setup is a CPU-Cold Pilot Unit riser with 6.7 m high and 0.092 m in diameter and return column of same size connected by the separation vase on the top. Such CPU geometry is designed for the circulating two phase flow and was built from acrylic transparent material. Air and FCC catalyst circulating under steady state operational conditions as it is required by fluid dynamic models hypothesis. Three test sections are installed along riser to monitoring and evaluating CPU operational conditions by the pressure and gamma transmission measurements. Simulation in the 3D CAD environment produced velocity distribution of air flow and solid particle following experimental conditions as density and particle diameter. Equations Initial conditions are under experimental setup limits as air velocity input and riser pressure output that are fixed for several geometry simulations. Solidworks 3D CAD fluid dynamic simulations allowed visualizing velocity distribution along riser more realistic than just numerical simulation that can be much influenced by maximum and minimum values. The flexibility to carry out geometry design simplified experimental tests by optimizing the required installation and helped theoretical analysis visualizing velocity distribution. CFD simulations in ANSYS CFX software was validate by gamma transmission measurement and compared to 3D CAD simulations in order to have a better understanding of CPU fluid dynamics.

Keywords: velocity in riser, CAD design and simulation, cold model FCC type, fluid dynamic parameters, gamma ray transmission

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