Device for introducing hot gas into a heating surface pipe of a waste heat boiler

Abstract

A device for introducing hot gas into a heating surface tube of a waste heat boiler having an outer tube connected to the boiler wall, in particular to the tube plate, has an inner or inlet tube that is connected to the outer tube by a rounded reversing cap to form an inlet port for the hot gas. The inner tube is surrounded by the outer tube at a distance and has an inflow section and an outflow section connected to the heating surface tube. The device further has a coolant transport tube, between the outer tube and the inner tube, that extends to the vicinity of the reversing cap. The inflow section and at least part of the outflow section of the inlet tube are conical in design, where the taper is less than 2° and the cross-section of the conical region of the inlet tube becomes smaller as it approaches the outflow section. The length of the conical region is at least four times the inner diameter of the inlet tube, and the conical region of the inlet tube is designed with at least two different tapers.

Dependencies are inferred from the claim text.