Patent ID: 7931710

Claim:
A synthesis gas cooler for extracting heat from synthesis gas produced by a gasification process, comprising: a shell having a top end and a bottom end, an inlet provided at the center of said top end, and an outlet; a fluid-cooled inner flue contained within the shell for receiving synthesis gas, said inner flue having a body defined by an enclosure wall made of fluid cooled tubes; a fluid-cooled outer flue contained within the shell for receiving the synthesis gas from the inner flue, said outer flue being ring shaped, concentric with said inner flue and being at least two thirds a length of the inner flue; at least one radiant heat transfer surface, in addition to said inner flue enclosure wall, located within the inner flue for cooling the synthesis gas; means for conveying the synthesis gas from the outer flue to the outlet; wherein said inner and outer flues are independent so as to allow separation for maintenance and inspection; and wherein the at least one radiant heat transfer surface is comprised of fluid-cooled, wing wall surfaces internally suspended within the synthesis gas cooler so that a significant portion of the wing wall surfaces are exposed to the incoming synthesis gas, the wing wall surfaces being each comprised of a planar bank of tubes provided adjacent to one another, arranged along a vertical longitudinal axis of the synthesis gas cooler and provided with inlet and outlet manifolds which distribute a fluid conveyed through the wing walls.