| 摘要 |
<p>A process and an apparatus are provided wich improve the ability of known processes to reduce pollutant concentration in combustion effluents. Distribution of pollution reducing agents within an effluent at the effective temperature window for effective gas phase reaction is greatly improved. A two-phase mixture having fine droplets of liquid, e.g. a NOx reducing agent such as aqueous solutions of urea or ammonia, dispersed in a gaseous component, ssuch as air, is injected into the effluent at sonic velocity to achieve a distribution of particles of sizes effective to uniformly reduce NOx within the zone of effective temperature while not producing a significant level of droplets so large that they survive beyond the temperature zone. Improvements in pollution reduction, chemical utilization, low secondary pollutant emission and reduced equipment fouling are achieved.</p> |
