Patent ID: 7442034

Claim:
An apparatus for cleaning a surface within a vessel, the apparatus comprising: an elongate combustion conduit extending from an upstream end to a downstream end associated with an aperture in a wall of the vessel and positioned to direct a shock wave toward said surface; and means for movably supporting the combustion conduit at one or more locations along a length of the combustion conduit, the means comurising one or more hangers wherein: the one or more hangers engage first portions of the combustion conduit; the one or more hangers couple the conduit to a support structure, the structure being separate from the furnace wall, and a second portion of the combustion conduit downstream of the first is held relative to the vessel so as to vertically move with the vessel due to thermal expansion of the vessel, the one or more hangers compliantly accommodating such vertical movement relative to said support structure.