Patent ID: 9192891
Filing Date: 2015-11-24
Classification: B01D,C09C,F23J

Abstract:
1. A method of reducing NOx emissions in the incineration of tail gas comprising: introducing tail gas into a combustor having a combustor temperature for incinerating the tail gas, wherein the tail gas comprises NO wherein the combustor comprises a vessel having a top, bottom, at least one tail gas inlet near the top of the vessel, at least one diluent inlet, an exhaust gas outlet near the bottom of the vessel, wherein gas flows generally in a top-to-bottom direction through the vessel; and introducing diluent into the combustor for controlling the combustor temperature to a temperature of from about 950° C. to about 1100° C., wherein the diluent is introduced in a top 33% of vessel height of the combustor, and wherein the diluent comprises at least one of (i) 25% or more on a gravimetric rate basis of total flue gas discharged from at least one process unit located downstream of said combustor, or (ii) flue gas from a tail gas burner or carbon black dryer.