Abstract
In this paper, a direct burning coal-fired hot flue gas furnace is taken as the research object. By using the SIMPLEC algorithm and the pressure based implicit solver in the analysis software FLUENT, the temperature, velocity and pressure distribution cloud chart and the CH4, CO, O2 and CO2 content distribution clouds are obtained by the numerical simulation of the gas solid two phases in the direct burning hot flue gas furnace. Through analysis, the high temperature zone in the hot flue gas furnace is the combustion area in the combustion chamber. There is a large amount of volatile matter in this area. The volatiles burn up a lot of oxygen rapidly and release carbon dioxide and heat. At the primary settlement, the radiation temperature of the reflected arch is higher, and more burnt particles are settled. The hot smoke flow in the whole hot flue gas is under negative pressure, and the flow is smoother. The flow in the furnace is relatively gentle, and the flow velocity and turbulence energy are large at the two turns. After the secondary sedimentation, the temperature gradually decreases and the output hot flue gas is substantially clean.
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