Effect of flow patterns in the recirculation catalyst standpipe on the performance of FCC high-efficiency regenerator

Peng, Wei; Wei, Yaodong; Liu, Yansheng; Han, Shengxian; Bao, Binyang

doi:10.1016/j.ces.2021.117154

Cited by 6 publications

(1 citation statement)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the pressure balance relationship, as eq shows, we can evaluate the pressure drops of both valves. For example, when the pressure drop of valve 1 is set as 20 kPa, the pressure drop of valve 2 is 9.73 kPa p regenerator + p combustor + p valve 0.25em 1 = p disengager + p riser + p valve 0.25em 2 …”

Section: Simulation Methods and Settingmentioning

confidence: 99%

Hydrodynamic Full-Loop Simulation of an Industrial Fluid Catalytic Cracking Fluidized Bed System with Mechanical Valves

Wu,

Liu,

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Circulating fluidized bed (CFB) systems are the core unit of many chemical and energy processes. Realizing a full-loop CFB system simulation can help one understand system operation laws for achieving optimal production. This study realizes a full-loop simulation of a 1.20 Mt/a industrial reaction− regeneration CFB system by applying mesoscale drag and constructing a mechanical valve pressure regulation model. The effects of the energyminimization multiscale (EMMS)-based drag models are investigated by analyzing the solid concentration, full-loop pressure balance, and mass flow rate. Then, the flow characteristics of the single-riser and full-loop simulations are compared. It is found that the single-riser simulation predicts a wider frequency distribution of solid concentration (average value ≈1.6 Hz), while the full-loop simulation captures a dominating frequency at a much lower value (≈0.1 Hz), indicating that the above two kinds of simulations reveal significantly different mechanisms in particle conveying and dynamic behavior of mesoscale structures.

show abstract