关键词: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">喉管式, 催化裂化, 原料喷嘴, 雾化性能, 预混室, 速度云图, 压力云图, 雾滴粒径分布

Abstract: Through cross-validation of nozzle atomization experiments and simulation values, the internal flow and atomization of the throat-type nozzle were analyzed, and an applicable simulation model was established. The results show that under the test and simulation conditions, the nozzle outlet spray presents a fan-shaped spray with even distribution; the spray droplet size distribution is unimodal, and the simulated result of the Sauter Mean Diameter (67.2 μm) has a deviation of -13.8% from the experimental result (78.0 μm), and the simulated result of the average velocity (55.1 m/s) has a deviation of 11.8% from the experimental result (49.3 m/s), indicating high accuracy of the model. Simulation studies found that the liquid phase undergoes primary atomization in the premixing chamber and secondary atomization in the throat, and is then sprayed out through the nozzle outlet with a reduced particle size to 67.2 μm. This outcome provides a basis for the structural optimization and improved design of the throat-type nozzle.

Key words: font-family:-apple-system, blinkmacsystemfont, ", font-size:14px, background-color:#FFFFFF, ">throat-type nozzle, catalytic cracking, feed nozzle, atomization performance, premixing chamber, velocity cloud map, pressure cloud map, droplet size distribution