Specialized ammonia injection grid with the dual purpose of suppressing noise
AssigneeHoneywell International Inc.
InventorChristopher Ferguson
Life of this patent
Estimating the term…
Abstract
An ammonia injection grid covered with sound adsorption material for a selective catalytic reduction (SCR) system that provides uniform distribution of ammonia to the SCR catalyst in NOX reduction systems and provides noise suppression for heat recovery steam generation systems, packaged boilers, simple cycle catalyst systems and fired heaters for superior operational efficiency. The ammonia injection grid covered with sound adsorption material includes an injection tube having at least one nozzle for injecting ammonia into a flow of flue gas. The ammonia injection grid also includes a corrugated turbulence enhancer covered with sound adsorption material associated with the injection tube to generate turbulent wake to enhance turbulent mixing and noise suppression.
Claims38
An ammonia injection grid, comprising:
- an injection tube and sound adsorption material, said injection tube having at least one nozzle for injecting ammonia into a flow of flue gas, wherein said injection tube extends generally transverse to the flow of flue gas and said sound adsorption material being situated along the external surface of said injection tube such that the sound adsorption material allows said nozzle to inject ammonia into the flow of flue gas while providing noise suppression.
An ammonia injection grid for a selective catalytic reduction (SCR) system, comprising:
- sound adsorption material;
- a plurality of elongated, circular injection tubes, each injection tube having a plurality of nozzles for injecting ammonia into a flow of flue gas wherein each injection tube extends generally transverse to the flow of flue gas and wherein said injection tubes having said sound adsorption material being situated along the external surface of said injection tubes such that the sound adsorption material allows said nozzles to inject ammonia into the flow of flue gas;
- a plurality of corrugated turbulence enhancers associated with a downstream side of each injection tube to generate turbulent wake to enhance turbulent mixing of the injected ammonia and flue gas and wherein each said corrugated turbulence enhancer having said sound adsorption material being situated along the external surface of said corrugated turbulence enhancer to enhance noise suppression;
- and
- a header in fluid communication with each injection tube for supplying the ammonia wherein said header having said sound adsorption material being situated along the external surface of said header to enhance noise suppression.
Dependencies are inferred from the claim text.