Patent ID: 7036529

Claim:
An arrangement for mixing a first gas flow and a second gas flow comprising: a line for the first flow; a supply part having an inlet for the second flow in the line, in order to achieve the mixing; a streamlined body arranged to be displaced in a longitudinal direction of the line at the inlet in order to achieve a variable venturi effect and in this way a variable suction effect and mixture of the mixed flow, the streamlined body penetrating a plane perpendicular to a longitudinal axis of the supply part at the inlet; and an actuator which displaces the body forwards and backwards in the line; wherein the streamlined body and the supply part define a venturi therebetween, and wherein the supply part has a cross-sectional area that decreases in the direction of flow in the line up to the inlet, such that the venturi has a throat proximate to the inlet independently of the position of the streamlined body in order to achieve maximal throttling in the line in close proximity to the inlet independently of the position of the body, in order to minimize the need for throttling and accompanying pressure losses.