Development And Research On The Catalytic Cracking Feed Nozzle With Composite Atomizing

In this paper, the experimental system was built and the experiments were conducted with the help of LS-2000 laser particle size analyzer. Six different parameter nozzles were designed, including exit-length, exit-width or exit-angle, etc. The experiment investigating of flow rate characteristics at different injecting pressure and different air-to-liquid mass flow rate ratio (ALR) was processed. Atomization characteristics experiments primarily focused on investigation of the influences to the structure parameters and the operating parameters. The experiments on the exit-structure pointed that there were crucial effects on exit transition structure and exit geometrical dimension, and gave some disciplines on exit-structure design. The nozzle which had spherical exit-structure had the proper atomization granularity and the worst effect of the conical exit-structure. There was no active role in atomization of the exit-structure that had small boundary. The Sauter Mean Diameter (SMD) had a declining tendency with the increasing L/D. There were fewer relations between the geometrical element of gas and liquid pipeline and the liquid mass flow became decrease with . The experimental studies discovered that the pressure drop was the atomization power, and the aim of research on the exit-structure was to change the pressure drop. The header of the nozzle atomization efficiency was higher than other sections, when this section's pressure loss reached 65% of the total pressure drop, the spraying efficiency of the nozzle up to be highest.