Abstract
Abstract
A sulfur recovery unit (SRU) thermal reactor is important equipment in a sulfur plant. Because its operating temperature is very high, the nitrogen oxides (NOx) produced by a SRU thermal reactor is one of the possible sources of air pollution. In this paper, NOx emission from a practical SRU thermal reactor is analyzed. Both the prototype thermal reactor and its modifications, including modifying the reactor geometry and using a vector wall are compared. Simulation results show that the SRU thermal reactor with a radius of curvature 1m at the zone 1 corner has the lowest NO emission. Compared with using a choke ring, the NO concentration at the reactor exit is higher using a vector wall.