Spraying Slurries: Impact Of Slurry Properties On Spray Characteristics And Agglomerate Formation In Fluidized Beds, Joshua Idowu

Electronic Thesis and Dissertation Repository

Abstract

Fluid Coking^TM is a process that upgrades Alberta’s heavy oil. The recycle stream in the process contains unwanted fines which could affect the interaction between the liquid feed and the bed particles and the tendency to form agglomerates. Agglomeration leads to lower product yields and vessel damage.

The impacts of slurry solids on spray stability and angle were measured in open air while the impacts on agglomerate stability and liquid distribution were studied in a fluidized bed. Particle properties were varied to understand the impact of the solids on agglomerates.

In open air, it was observed that the …

Effect Of Local Bed Hydrodynamics On The Distribution Of Liquid In A Fluidized Bed, Lingchao Li

Electronic Thesis and Dissertation Repository

In an industrial Fluid CokerTM, liquid bitumen is injected into a bed of hot coke particles through spray nozzles, grouped in several banks at different vertical positions. The main objective of this thesis is to determine whether significant improvements in liquid-solid contact could be achieved by optimizing the location of the spray nozzles. In the coker regions where bitumen is injected, the gas is a mixture of product vapors and steam. Steam introduced at different levels rises through the coker: the stripping steam is injected near the bottom, then the attrition steam above the stripper and finally the bitumen atomization …

Effect Of Spray Jet Interactions On The Liquid Distribution In A Fluidized Bed, Helal Elkolaly

Electronic Thesis and Dissertation Repository

Many processes use spray nozzles to introduce liquid into a fluidized bed. One such process is the Fluid Coking Process which is used to upgrade bitumen. Poor liquid distribution in a Fluid Coker proves detrimental as agglomerates form which introduce mass and heat transfer limitations. The main objective of this thesis is to determine the effect of interacting spray jets on the liquid distribution in a Fluid Coker. This was accomplished by using a low temperature experimental model of Fluid Coking to estimate the liquid distribution. Preliminary screening of nozzle positions was accomplished by the use of conductance measurements. A …

Effect Of Temperature And Successive Sprays On Liquid Distribution In Fluidized Beds, Liliana Andrea Pardo Reyes

Electronic Thesis and Dissertation Repository

Liquid injection in gas-solid fluidized beds is used in several industrial processes including food additive production, manufacturing of fertilizers, intermediate processing of pharmaceutical capsules and oil refining (i.e., Fluid Coking^TM and Fluid Catalytic Cracking (FCC)). Good quality in the liquid distribution on the fluidized particles is fundamental in these processes either to ensure uniformity in the formation of desirable agglomerates, or to minimize their formation when undesirable. In the Fluid Coking process, for example, improving the liquid distribution and minimizing agglomerate formation will result in increasing the overall yield of the process and avoid operability problems.

A new experimental …