Numerical and Experimental Analysis of Plasma-Chemical Hybrid Process for Emission Control of Fossil-Fuel Fired Glass Melting Furnace

Plasma-chemical hybrid exhaust gas treatment technology is a combined method of plasma and chemical processes, and is expected to be an exhaust gas treatment technology that is difficult to adapt to existing catalyst methods for NOx treatment. It is necessary to efficiently oxidize NO with ozone by forming a local cooling region with water spray for the adjustment of high-temperature exhaust gas in the plasma processes. As a practical application of the plasma-chemical hybrid process (PCHP) for the treatment of glass-melting furnace exhaust gas, this study reports on an efficient oxidation method for NO using simulation and experimental results. In particular, to apply PCHP to various reactor, simulation is performed under three different flow conditions and the results of temperature distributions and NO oxidation efficiencies are compared with experimental results. As a result, the formation of a local cooling region is confirmed by both experiments and simulations for every gas flow condition with water spraying, and both results showed good agreement. In both experiments and simulations, NO oxidation efficiencies increase with increasing ozone cooling water flow rates. At the highest flow rate of 19800 m
³
/h, the experimental and simulation results were 70% and 67%, respectively. Although the local cooling region decreases as the gas flow rate increases, the NO oxidation efficiency increases because the NO mass is large enough to be efficiently oxidized by ozone.