Air atomizing spray nozzle assembly
AssigneeSpraying Systems Co.
InventorDaniel A. Vidusek
Life of this patent
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Abstract
A spray nozzle assembly particularly adapted for directing a finely atomized slurry of hydrated lime for removing sulfur dioxide from flue gases. The nozzle assembly includes a nozzle body having a first pre-atomizing and mixing chamber into which pressurized liquid and air flow streams are directed for breaking down and pre-atomizing the liquid, an orifice plate at the downstream end of the first pre-atomization and mixing chamber for restricting the fluid flow into a second chamber defined by the orifice plate and spray tip, and a spray tip having a plurality of circumferentially spaced discharge orifices through which atomized liquid particles in the second chamber discharge in a substantially conical cloud-like spray pattern of finely atomized particles.
Claims30
A spray nozzle assembly comprising a nozzle body defining a first pre-atomization and mixing chamber, means defining an air inlet orifice through which a pressurized air stream is directed into said first chamber, means defining a liquid inlet orifice through which a pressurized liquid stream is directed into said first chamber and with the assistance of said pressurized air stream is broken down into pre-atomized liquid particles, an end wall at a downstream end of said first chamber formed with a reduced diameter orifice, a spray tip on an end of said body, said spray tip and end wall defining a second atomizing and mixing chamber into which pre-atomized liquid particles from said first chamber are directed via said end wall orifice, said spray tip having an uninterrupted end wall impingement surface area in axial alignment with and of larger area than said reduced diameter orifice against which pre-atomized liquid particles passing through said reduced diameter orifice are directed, and said spray tip having a plurality of discharge orifices disposed about said uninterrupted impingement surface area through which atomized liquid particles in said second chamber discharge as a spray pattern of finely atomized particles.
A spraying system for removing sulfur dioxide from flue gases comprising a flue through which gases containing sulfur dioxide are directed, a nozzle assembly including a nozzle body which defines a first pre-atomizing and mixing chamber, means for directing a pressurized air stream into said first chamber, means for directing a liquid stream of lime slurry into said first chamber which with the assistance of said pressurized air stream is broken down into pre-atomized liquid particles, an end wall at a downstream end of said first chamber formed with a reduced diameter orifice, a spray tip on an end of said body, said spray tip and end wall defining a second atomizing and mixing chamber into which pre-atomized liquid particles from said first chamber are directed via said end wall orifice, said spray tip having an end wall impingement surface area in axial alignment with said reduced diameter orifice against which pre-atomized liquid particles passing through said reduced diameter orifice are directed, and said spray tip having a plurality of discharge orifices disposed about said impingement surface area through which atomized liquid particles in said second chamber discharge into said flue as a spray in which a substantial portion of the particles are less than 100 microns in diameter.
A spray nozzle assembly comprising a nozzle body defining a first pre-atomization and mixing chamber, means defining an air inlet orifice through which a pressurized air stream is directed into said first chamber, means defining a liquid inlet orifice through which a pressurized liquid stream is directed into said first chamber and with the assistance of said pressurized air stream is broken down into pre-atomized liquid particles, an end wall at a downstream end of said first chamber formed with a reduced diameter orifice, a spray tip on an end of said body, said spray tip and end wall defining a second atomizing and mixing chamber into which pre-atomized liquid particles from said first chamber are directed via said end wall orifice, said second chamber having a diameter at least twice the diameter of said end wall orifice, and said spray tip having a plurality of discharge orifices through which atomized liquid particles in said second chamber discharge as a spray pattern of finely atomized particles.
Dependencies are inferred from the claim text.