Nature Environment and Pollution Technology

Xiangming Zeng ¹, Dekai Tang ¹

Affiliations
1 Marine Engineering Department, Shanghai Maritime University, Shanghai, 201306, CN

Abstract

Selective Catalyst Reduction (SCR) is currently the most practical method for NOx reduction of marine diesel engines. The effective use of urea depends very much upon the configuration and structure of the nozzle. This paper simulated the operation of the urea nozzle of the marine SCR system in ANSYS fluent, and utilized the Euler-Lagrange discrete phase model to calculate the droplet movement of different injection models. The simulation results show that the droplet hardly impinged on the exhaust pipe wall and the Sauter Mean Diameter (SMD) of the urea solution droplet uniformity is the best when the injection angle is at 120°.

Keywords

Urea Nozzle Optimization, Injection Angle, NOx Reduction, SCR.

Full Text