Study on the Influence of Oxygen-Enriched Combustion on Temperature Field and Flue Gas Composition of Hydrogen Reformer

Abstract

Oxygen-enriched combustion technology is a new energy-saving and emission-reduction technology. It is important to study the influence of oxygen-enriched combustion on the temperature field and flue gas composition in the furnace of hydrogen-making reformer to improve combustion efficiency and hydrogen yield. Considering the structural characteristics of 4×104m3/h top-burning atmospheric pressure heating hydrogen reforming furnace, a three-dimensional finite element model of the fluid in the furnace of hydrogen-making reformer is established by finite volume method, and the standard k-model, non-premixed combustion model is selected. The discrete coordinate radiation model were studied to study the influence of different oxygen-rich conditions on the temperature field and smoke composition of the hydrogen-making reformer. The results show that as the oxygen content in the combustion air increases, the fuel gas gradually burns. When the oxygen content is 32.5%, the oxygen-enriched combustion characteristics in the furnace of hydrogen-making reformer are obvious. Considering the cost of oxygen-enriched air and the treatment cost of flue gas, the comparison of oxygen-enriched air with 32.5% oxygen content is reasonable selected. The research results can provide theoretical guidance for the engineering application of oxygen-rich combustion technology in hydrogen-making reformer.