Simulation of heat transfer and fluid flow of hot oil in radiation section of an industrial furnace considering coke deposition

Amini, Elham; Peyghambarzadeh, S.M.; Zarrinabadi, Soroush; Hashemabadi, Seyed Hassan

doi:10.1007/s10973-021-10847-7

Cited by 2 publications

(2 citation statements)

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“…Afterwards, some models for both light and heavy HC feedstocks were presented. [8][9][10][11] High coil temperatures, high precursor concentrations, and low concentration of inhibitor agents at the end section of reactor outlet leads to the highest amount of coke formed in this area. Niaei et al [12] reported coke thickness of up to 12.5 mm over 1750 operation hours in the studied naphtha furnace, where the maximum thickness occurs in the last 10% of the reactor length.…”

Section: Introductionmentioning

confidence: 99%

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Coke deposition and run length in industrial naphtha thermal cracking furnaces via a quasi‐steady state coupled CFD model

et al. 2022

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Mathematical modelling of the thickness of the coke layer growing over months in millisecond cracking reactors is a dilemma in computational fluid dynamics (CFD) simulation. To address the time scale issue, a quasi-steady state (QSS) approach was employed through a comprehensive coupled reactor/ firebox CFD model in the current study. The model was applied to predict the time-dependent behaviour of coke deposition and to determine the appropriate operating conditions for maximum olefin yields over an industrial furnace run length. A novel algorithm was designed to overcome the complexity of QSS simulation of the CFD model, which is a combination of reactive turbulence flow, combustion, and radiation models. The furnace parameters were studied as a function of two variables: the dilution steam-to-feed ratio and the liberated heat by the burners. The results indicated that the run length can be extended by up to 20% while retaining the main product yields. This study offers practical suggestions to maximize the run length in the operation.

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Section: Introductionmentioning

confidence: 99%

“…For decades, radiative transfer equation (RTE) models in fireboxes were mostly simulated utilizing Hottel's zonal method, [11,13,14,19,20,32,33] but some firebox simulations solved the RTE models in conjunction with CFD models. [16,17,26,28] Due to the growing coke layer inside the tubes, steam cracking is a dynamic process.…”

Section: Introductionmentioning

confidence: 99%