Patent ID: 7036461

Claim:
Waste heat boiler for a Claus system, having a steam generator chamber surrounded by a pressure-resistant mantle ( 14 ), a long tube bundle ( 18 ) of heat exchanger tubes, which extend through the steam generator chamber and are inserted into tube plates ( 19 ) that delimit the steam generator chamber, at both ends, at least one additional tube bundle ( 20 ) of shorter heat exchanger tubes, which are also inserted into the tube plate ( 19 ) at their exit-side end, and open into an in-flow chamber ( 21 ) at their entry-side end, and a head piece ( 22 ) that follows the tube plate ( 19 ) at the exit-side end and is subdivided into sections, whereby a hot process gas that exits from a combustion chamber ( 2 ) flows through the long tube bundle ( 18 ), whereby the in-flow chamber ( 21 ) is disposed within the steam generator chamber, and has a cooler process gas ( 10 ) from a catalyst stage ( 4 ) of the Claus system applied to it, whereby a tube bundle ( 18 , 20 ) is assigned to each section of the head piece ( 22 ), in each instance, and whereby devices for conducting condensed sulfur away are connected to the sections.