Patent ID: 8360340

Claim:
A method for selective-recirculating spraying a liquid comprising the steps of: providing a body ( 1 ) with an internal channel ( 2 ) capable of creating a laminar unidirectional gas flow having a direction, said internal channel ( 2 ) having an intake end for entering said gas flow, and a discharge end for exiting said gas flow; a liquid feed pipe ( 6 ) for supplying said liquid into said internal channel ( 2 ), said liquid feed pipe ( 6 ) having an end furnished with a spray nozzle ( 3 ) placed within said internal channel ( 2 ) at a predetermined angle to said direction of the gas flow, said spray nozzle ( 3 ) producing a spray conical distribution of liquid particles of different sizes, wherein a specific sector of the spray conical distribution corresponds to a specific particle size; a collector ( 4 ) for collecting particles of the liquid of a predetermined size, said collector ( 4 ) is disposed in a predetermined sector of said spray conical distribution with respect to the predetermined size of particles at the discharge end of said internal channel ( 2 ); a returning pipe ( 5 ) having a first end connected to said collector ( 4 ) and a second end substantially associated with said spray nozzle ( 3 ) for re-spraying the liquid; inputting said gas flow into said intake end of the internal channel ( 2 ); inputting said liquid via said spray nozzle into the internal channel ( 2 ); collecting particles of the liquid of said predetermined size; and returning the collected particles of the liquid of said predetermined size to said spray nozzle ( 3 ) for re-spraying.