Exxonmobil Research and Engineering Company

The University of British Columbia

Martha Salcudean

Kevin Reid

John R Grace

Jennifer McMillan

Konstantin Pougatch

Christine Hrenya

Amir Hossein Ahmadi-Motlagh

A computer implemented method simulates the behavior of a gas-solid mixture in a fluidized bed having a particulate comprising Geldart group A particles using a Eulerian model comprising, for each time step (a current time step) and for each cell: obtaining an initial value of an agglomerate diameter corresponding to the cell and corresponding to the beginning of the current time step; performing a force-balance procedure for the cell to determine a first agglomerate diameter corresponding to the cell and corresponding to the current time step, wherein performing the force-balance procedure comprises determining a plurality of forces for the cell based at least in part on the initial value of the agglomerate diameter; updating one or more drag relationships for the current time step based at least in part on the first agglomerate diameter; and performing a computational fluid dynamic (CFD) solve procedure to determine, for the current time, the any one or more of: one or more of: a gas velocity {right arrow over (V)}for the cell, a particle velocity {right arrow over (V)}for the cell, a gas pressure for the cell, a particulate pressure for the cell and a solid fraction &#x3b5;for the cell. Performing the CFD solve procedure is based at least in part on the updated drag relationships.

Methods and systems for simulating hydrodynamics in gas-solid fluidized beds

The liquid feed nozzle assemblies for a circulating fluid bed reactor comprise (i) a throttle body premixer to combine liquid feed with atomization steam to form a liquid feed/steam mixture comprising gas bubbles in liquid; (ii) a conduit connected to the premixer and to a discharge nozzle to convey a flow of the liquid/steam mixture created by the premixer to the nozzle body; (iii) a discharge nozzle connected to the flow conduit to shear the liquid feed/steam mixture to create liquid feed droplets of reduced size and (iv) a disperser at the outlet of the discharge nozzle to provide a spray jet of liquid feed having an increased surface area relative to a cylindrical jet. The nozzle assembles are particularly useful in fluid coking units using heavy oil feeds such a tar sands bitumen.

Fluid injection nozzle for fluid bed reactors

Growing community of inventors

Vancouver, Canada

Martha Salcudean