Patent ID: 7296542
Filing Date: 2007-11-20
Classification: F22B,F28F,Y02P

Abstract:
1. An apparatus for introducing hot gas into a heating surface tube of a waste heat boiler, the waste heat boiler also having a tube plate, the apparatus comprising: an outer tube connected to the tube plate; an inner tube disposed within the outer tube and spaced at a distance therefrom, the inner tube having an inner diameter, an inflow section, and an outflow section connected to the heating surface tube, the inflow section and at least part of the outflow section defining a conical region, the conical region having a conical-shape with a taper of less than 2°, a cross-section that becomes smaller from the inflow section to the outflow section, a length that is at least four times the inner diameter of the inner tube, and at least two different tapers; a rounded reversing cap connecting the inner tube to the outer tube, the reversing cap defining a gas inlet port for the hot gas; and a coolant transport tube disposed between the outer tube and the inner tube, the coolant transport tube extending to a distal end disposed proximate to the reversing cap.