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http://dx.doi.org/10.12925/jkocs.2013.30.2.320

Study on Computational Fluid Dynamics(CFD) Simulation for De-NOx in the incinerator at Taebaek city  

Kim, Ji-Hyun (Dept. of Environmental Engineering, College of Engineering, Kangwon National University)
Park, Young-Koo (Dept. of Environmental Engineering, College of Engineering, Kangwon National University)
Publication Information
Journal of the Korean Applied Science and Technology / v.30, no.2, 2013 , pp. 320-332 More about this Journal
Abstract
The feed air to MSW incinerator influences on the residence time of combustion gas, removal of unburnt ash and exiting gas temperature. Thus the secondary air volume could present sufficient residence time which can maintain the exiting temperature over $850^{\circ}C$. The secondary air also relates directly with the turbulence in the inside of combustion chamber, which finally provide the stable combustion condition. The present study designed a modern incinerator for a field scale, and evaluation of the potential amount of primary air based on the daily combustible quantity. From the evaluated primary air volume, the secondary air flow rate could be estimated, and its dynamic behavior was verified. In addition, the obtained air volume enables to find an optimum operation condition of the combustion. As a result of the CFD simulation, the air ratio 75 : 25 between primary and secondary air amount was optimum ratio than design criteria 72 : 28. And the flow velocity ratio of front-back of secondary air jet nozzle was found excellent at 1 : 3. In addition, the result of applied to the plant, the removal efficiency of NOx and CO generation would concentration of CO.
Keywords
Incinerator; air flow rate; CFD; removal efficiency; Fluent;
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