Coupling selective catalytic reduction process inside a coke oven regenerator: The influence of mixing parameters on NO reduction

Many coking plants have adopted the process of preheating flue gas to apply medium and low temperature selective catalytic reduction (SCR) denitrification technology, which increases NOx treatment cost, fuel consumption, generates secondary pollutants. Based on unique distribution characteristics coke oven regenerator, this work proposes a method for synergizing SCR inside regenerator remove NOx. A 3-D numerical model synergy between heat storage reaction was constructed study influence mixing parameters (atomization angle, injection velocity, nozzles number) NO NH3 distribution. The validity verified. results showed that uneven near layer small coating area limited efficiency. Increasing number more beneficial than velocity atomization angle improving uniformity efficiency, achieving maximum efficiency 37.1% (reduced 251.6 mg/m3). Further research found capacity co-operative cannot exceed 36% without changing thermal brick structure. When inlet concentration is less 235 mg/m3, ensures outlet meets national emission standards.