Özet:

In order to meet our ever-increasing energy needs, it may not be convenient to directly use the coal reserves, which are abundant in our country, because it is difficult to transport, requires large volumes of combustor, leaves wastes such as ash and slag, and especially due to the high pollutant emissions. Gases obtained from coal exposed to heat treatment in an oxygen-free environment, on the other hand, would be more appropriate to consume because it is easy to transport, requires a simple and small burner, and requires less air during combustion, and especially forms less pollutant emissions. In this study, the premixed combustion performance and emission characteristics of coke oven gas, which is a by-product of coal coking, were numerically investigated. A premixed burner pre-mixing the fuel and air, and introducing the mixture to the combustion chamber was used to burn the coke oven gas. The fuel-air mixture was consumed as premixed at excess air ratios of λ=1,2 and λ=1,5 under lean combustion conditions. In the study presented, the amount of fuel corresponding to a power of 10 kW was introduced to the combustion chamber. The experimental setup in which the measurements were made was modeled as three-dimensional through a commercial code ANSYS-Fluent. Combustion modeling was carried out by integrating the Eddy Dissipation Concept into the combustion model by creating 21, 27, 78, 162 and 239-step reactions for the coke oven gas and end-of-combustion NO_X estimations with the help of GRI-Mech 3.0 chemical kinetics as a combustion model. P-1 was chosen as the radiation model, and 3 different turbulence models were used to determine the effect of the turbulence model. The obtained temperature and NO_X profiles were compared with the experimental data and it was determined that there was a satisfactorily good agreement, it was seen that the 162-step reaction was sufficient.

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