Experimental And Numerical Simulation Study On Atomizer Performance In Coke Cooling Process Of Delayed Coking

This paper focus on coke cooling process of delayed coking unit, through the experiment and numerical simulation research of airblast atomizer in the big blow, preliminary to com-plete the development of cold coke atomization nozzle. Using COMSOL numerical simula-tion software, this paper adopt the porous medium coke layer structure model, through tran-sient numerical simulation, we draw the distribution of speed, pressure and temperature in the coke drum. Through constructing the experiment equipment, this paper carries out cold ex-periment and numerical simulation study of high pressure jet atomization nozzle performance. The results of the study show that there are split and broken and collision polymerization ef-fects in the nozzle atomization process. Under a certain water flow rate, when the inlet pres-sure is heavier, the gas flow rate becomes greater, and in contrast, the atomized droplet size is smaller. Under a certain inlet pressure, when the liquid flow rate is higher, the atomized parti-cle size is larger. Otherwise, the atomized particle size becomes smaller with gas liquid ratio decreasing, and the decreasing trend more and more slow, finally the best gas liquid ratio is ALR=0.2. On this basis, in this paper, the preliminary design the airblast atomizer, which is suitable for the industrial production in the delayed coking process. Thermal state numerical simulation show that the vaporization of the spray mist torch rate is between17-20%.