Convective recirculation effect on the selective non-catalytic reduction behavior in an industrial furnace

Abstract

Selective non-catalytic reduction (SNCR) has become an important technique for reducing NOx emissions in industrial furnaces. The occurrence of convective recirculation can cause significant changes in SNCR performance. This paper presents the results of a study performed by Computational Fluid Dynamics (CFD) considering: (i) changes of initial NO X ; (ii) injection plan and (iii) NH 3 /NO molar ratio. The simulations have demonstrated that the convective recirculation (resultant from different injection plans and high temperature gradients) of flue gas assumes a role of vital importance for performance analysis of existing plants and the potential NO X reduction in furnaces during the design phase.

Simulating Leakage Impact on Steel Industrial System Functionality

“…With a leak as a source term, a single-pressure two-fluid flow has been established by [3][4][5], with mass balance equations on the focus. The model has been proposed to simulate a stratified-pattern two-phase flow, considering a horizontal pipe prone to leakage.…”