Influence of bell structure of coke dry quenching furnace on coke distribution
The problem of coke particle size segregation in the coke dry quenching(CDQ)furnace can seriously affect the gas-solid heat transfer efficiency.Based on the discrete element method(DEM),this study investigates the actual material surface shape,particle size distribution,and particle size segregation phenomenon generated during the coke loading process of a steel plant's coke dry quenching furnace.Reasonable optimization is carried out on the material surface of the coke dry quenching furnace to improve the particle size distribution of the stacked material surface.The results show that compared to the inclination angle of the bell and the angle between the dividing plate,the direction of the beam has a greater impact on the shape and particle size uniformity of the material surface.Due to the diversion effect of the bell beam on coke particles,it is easy to form inclined stacking material surfaces,resulting in uneven distribution of coke particles.After the direction of the rotating beam is parallel to the opening of the coke pot,the inclining effect of the material surface is weakened,and the segregation of coke particle size is reduced.Under the optimized conditions of 40°-60° inclination angle of the material bell,30°-60° angle of the dividing plate,and beam direction,the maximum reduction in material height difference is 70.8％,and the maximum reduction in standard deviation is 49.4％,especially at larger angles,the effect is significant,which helps the gas flow uniformly in the packed bed.
discrete element modelingcoke dry quenchingpacked bedstacked shapeparticle size distributionnumerical simulation
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