Affect The Distribution Pipe Structure Within The FCC Regenerator Air Distribution

The main contents of this paper is the distribution tube structure of the flow field in theregenerator, the calculating model of k-e model, entrance boundary conditions for speedentrance, exit boundary conditions for the natural flow. Selecting RSM turbulence model inFLUENT software distribution within the separator tube structure on numerical simulation,and the calculated results were compared with the experimental data, so as to ensure theaccuracy of the simulation results.Flow field is calculated using the FLUENT6.3fluidcalculation software to calculate. The gas flow field calculation results show that theregenerator air flow from import into the main air distribution tube45°spray nozzle obliquein the bottom of the regenerator to carry the catalyst upward movement, change, axialcross-section along the flow direction the speed difference decreasing. The main distributionpipe air continuous flow, and then into the main distribution manifold and nozzle, so along thedirection of gas flow, the axial velocity of the gas is continuously decreased.Effect of uniformair flow is the main factor nozzle distribution, main air distribution tube, pipe distribution. Inthis paper, by changing the nozzle distribution to ensure that the air flow distribution. Studyfound that, Within a certain range, blocking the nozzle number is less, the gas flow distributionmore uniform. In the original structure regional1and8small gas flow. Regional4and5largegas flow. Other area is relatively uniform. In each area number and the total blocking wall holenumber changed little. Change wall hole position for the change of gas flow.when the plughole number48, and distribution in the2-7region, each region flow is uniform, maximum andminimum value is2.82%. Main air distributor of regenerator in the uniform distribution of thegas, is to ensure that the catalyst bed is in the steady flow state of important premise,distributor running state directly affects the distribution of airflow in regenerator and theconcentration of the dilute phase distribution, thus affecting the regeneration efficiency of regenerator and catalyst loss rate. This paper, by means of numerical simulation, and systemicstudy of regenerator internal gas phase flow, through comparing different structure, which is akind of optimization is suitable for the main refinery wind distribution pipe structure, to ensuregood, fluidized bed air distribution and stable condition.