Patent ID: 7886994

Claim:
A nozzle for the introduction and metered addition of a treatment medium ( 9 ) into the exhaust gas stream during combustion processes, in which a treatment medium ( 9 ) and a carrier medium ( 10 ) can be mixed together and sprayed out jointly, wherein the nozzle exhibits an outer casing element ( 2 ) and an inner displacement body ( 1 ) to form a nozzle gap ( 14 ), wherein the inner displacement body ( 1 ) is cylindrical, and the outer casing element ( 2 ) is a round tubular element, said inner displacement body ( 1 ) having a length L 2 , partially extending into the outer casing element ( 2 ) over a length L 1 and partially protruding from the outer casing element ( 2 ) to form the nozzle gap ( 14 ); and the nozzle gap spanning the entire length L 1 ; and the cross section of the nozzle gap ( 14 ) being constant along the length of the inner displacement body ( 1 ), wherein the displacement body ( 1 ) exhibits a mixing chamber ( 18 ) inside the casing element ( 2 ) and a tapered area ( 3 ) in the transitional area between the mixing chamber ( 18 ) and nozzle gap ( 14 ), and the mixing chamber ( 18 ) communicates with a pressure chamber for the carrier medium ( 10 ), out of which the carrier medium ( 10 ) flows to the nozzle gap ( 14 ).